1. The utility model provides an inside and outside footpath test fixture which characterized in that includes:

the test device comprises a fixed disc, a fixing piece, a supporting rod, an inner diameter test rod, a first outer diameter test rod and a second outer diameter test rod;

the top surface of the fixed disc is fixed with a fixing piece, and the middle part of the bottom surface of the fixed disc is vertically inserted with a supporting rod;

the inner diameter testing rod penetrates through the fixed disc and is obliquely fixed on the fixing piece, and an included angle between the inner diameter testing rod and the supporting rod is an acute angle;

the inner diameter testing rods are uniformly distributed on the fixed disc;

the middle parts of the first outer diameter testing rod and the second outer diameter testing rod are fixed in a crossed mode, and the first outer diameter testing rod and the second outer diameter testing rod are connected to the supporting rod in a sliding mode;

the surface of the inner diameter test rod and the surface of the outer diameter test rod are respectively marked with scales.

2. The inner and outer diameter test tool according to claim 1, characterized in that:

the first outer diameter testing rod comprises a first connecting piece and an outer diameter sub-testing rod;

the outer diameter sub test rod is fixed at two ends of the first connecting piece;

the second outer diameter testing rod comprises a second connecting piece and the outer diameter sub testing rod;

the outer diameter sub test rods are fixed at two ends of the second connecting piece;

and a through hole is formed in the middle of the second connecting piece, and the first connecting piece penetrates through the through hole and is vertically fixed with the second connecting piece.

3. The inner and outer diameter test tool according to claim 2, characterized in that:

the outer diameter sub test rod comprises a first telescopic rod, a second telescopic rod and a third telescopic rod;

the first telescopic rod is hollow and has an opening at one end, a first limiting block is arranged at the top of the inner surface of the first telescopic rod close to the opening, and the second telescopic rod is arranged in the first telescopic rod;

the second telescopic rod is hollow and is provided with an opening at one end, a first sliding block is arranged at the bottom of the outer surface of the first telescopic rod close to the tail end position so that the second telescopic rod can slide in the first telescopic rod, a second limiting block is arranged at the top of the second telescopic rod and is used for being matched with the first limiting block to position the second telescopic rod, a third limiting block is arranged at the top surface of the inner surface of the first telescopic rod close to the opening position, and a third telescopic rod is arranged in the second telescopic rod;

the bottom of the position, close to the tail end, of the outer surface of the third telescopic rod is provided with a second sliding block, so that the third telescopic rod can slide inside the second telescopic rod, and the top of the third telescopic rod is provided with a fourth limiting block used for being matched with the third limiting block to position the first telescopic rod.

4. The inner and outer diameter test tool according to claim 2, characterized in that:

two ends of the first connecting piece are provided with openings, the two ends of each opening are respectively an opening upper edge and an opening lower edge which are tilted outwards, and a telescopic structure is fixed inside each opening;

the telescopic structure comprises a first rivet, a second rivet, a connecting ring and a spring;

the first rivet and the second rivet are both of I-shaped structures;

the connecting ring is hollow, two ends of the connecting ring are open, and the width of the hollow part of the connecting ring is greater than the length of two ends of the pin;

one end of the first rivet sequentially penetrates through the upper edge of the opening and the opening at one end of the connecting ring and is clamped in the connecting ring, and the other end of the first rivet is clamped on the outer surface of the upper edge of the opening;

one end of the second rivet sequentially penetrates through the lower edge of the opening and the opening at the other end of the connecting ring and is clamped in the connecting ring, and the other end of the second rivet is clamped on the outer surface of the lower edge of the opening;

the spring is sleeved on the outer surface of the connecting ring, one end of the spring abuts against the inner surface of the upper edge of the opening, and the other end of the spring abuts against the inner surface of the lower edge of the opening.

5. The inner and outer diameter test tool according to claim 4, characterized in that:

one end of the outer diameter sub testing rod, which is connected with the first connecting rod, is provided with a hollow clamping groove;

the upper edge of the opening and the lower edge of the opening are clamped into the hollow clamping groove after being compressed, so that the outer diameter testing rod is fixed with the first connecting rod.

6. The inner and outer diameter test tool according to claim 1, characterized in that:

the internal diameter test pole is including adorning the fastener, it establishes to adorn the fastener the internal diameter test pole is close to the position of the stiff end of internal diameter test pole, adorn the fastener with the mounting is connected, so that the internal diameter test pole with fixed disk relatively fixed.

7. The inner and outer diameter test tool set forth in claim 6, wherein:

the fixing piece is fixed in the middle of the top surface of the fixed disc;

the fixing piece comprises a base and four clamping grooves uniformly fixed on the base, the four clamping grooves are obliquely arranged, and the vertexes of the four clamping grooves are the middle points of the base;

the clamping piece is triangular and is fixed by a screw after being inserted into the clamping groove;

or, the number of the fixing pieces is four, the fixing pieces are fixed on the top surface of the fixed disk far away from the circle center and are uniformly distributed on the fixed disk;

the middle part of the fixing piece is provided with a vertical clamping groove;

the clamping piece is in a strip shape, one end of the clamping piece is connected with the fixed end of the inner diameter testing rod, and the other end of the clamping piece is clamped in the vertical clamping groove.

8. The inner and outer diameter test tool according to claim 1, characterized in that:

the device also comprises a speed reducing mechanism;

the speed reducing mechanism comprises a supporting frame, a steel wire, a pulley and a speed reducing block;

the supporting frame is provided with a plurality of pulleys in a hanging manner, and the steel wires are sequentially hung on the pulleys;

one end of the steel wire penetrates through the middle part of the outer diameter testing rod and is connected with the speed reducing block.

9. The inner and outer diameter test tool according to claim 1, characterized in that:

and the support rod is provided with a plurality of pin holes for inserting limit pins to block the falling of the outer diameter testing rod.

10. The inner and outer diameter test tool according to claim 1, characterized in that:

the angle of the acute angle is 30-45 degrees.

Background

A large number of sealing round gaskets with different specifications for sealing comprise inner diameters, outer diameters and sealing gasket thicknesses, and the acceptance requirements are required to be consistent with those of O-shaped rings.

Since the dimensions of the O-ring include inner diameter and cross-sectional diameter, the cross-sectional diameter can be measured with a thickness gauge. The prior patent only contains an inner diameter testing device generally, but is a special optical automatic testing device generally, and has higher price; manual test equipment has some limitations in the test range or has no direct reading.

The sealing circular pad has the advantages that the size is inner diameter, outer diameter and thickness, only the thickness can be measured by a thickness gauge, and the testing state is a natural non-stressed state, so that the inner diameter and the outer diameter testing tool need to be designed to meet the size requirement. Most of the prior patents can not realize the simultaneous testing of the inner diameter and the outer diameter, and equipment capable of simultaneously carrying out the inner diameter and the outer diameter has certain limitation or can not directly read in the testing range.

Aiming at the problem that the inner diameter and the outer diameter can not be measured simultaneously in the prior art, an effective solution is not provided at present.

Disclosure of Invention

In order to solve the problems, the invention provides an inner diameter and outer diameter testing tool, which is characterized in that an inner diameter testing rod and an outer diameter testing rod are fixed together, and the inner diameter and the outer diameter of a sealing circular gasket are measured simultaneously when the sealing circular gasket falls down, so that the problem that the inner diameter and the outer diameter cannot be measured simultaneously in the prior art is solved.

In order to achieve the above object, the present invention provides an inner and outer diameter testing tool, comprising: the test device comprises a fixed disc, a fixing piece, a supporting rod, an inner diameter test rod, a first outer diameter test rod and a second outer diameter test rod; the top surface of the fixed disc is fixed with a fixing piece, and the middle part of the bottom surface of the fixed disc is vertically inserted with a supporting rod; the inner diameter testing rod penetrates through the fixed disc and is obliquely fixed on the fixing piece, and an included angle between the inner diameter testing rod and the supporting rod is an acute angle; the inner diameter testing rods are uniformly distributed on the fixed disc; the middle parts of the first outer diameter testing rod and the second outer diameter testing rod are fixed in a crossed mode, and the first outer diameter testing rod and the second outer diameter testing rod are connected to the supporting rod in a sliding mode; the surface of the inner diameter test rod and the surface of the outer diameter test rod are respectively marked with scales.

Further optionally, the first outer diameter testing rod comprises a first connecting piece and an outer diameter sub-testing rod; the outer diameter sub test rod is fixed at two ends of the first connecting piece; the second outer diameter testing rod comprises a second connecting piece and the outer diameter sub testing rod; the outer diameter sub test rods are fixed at two ends of the second connecting piece; and a through hole is formed in the middle of the second connecting piece, and the first connecting piece penetrates through the through hole and is vertically fixed with the second connecting piece.

Further optionally, the outer diameter sub-test rod comprises a first telescopic rod, a second telescopic rod and a third telescopic rod; the first telescopic rod is hollow and has an opening at one end, a first limiting block is arranged at the top of the inner surface of the first telescopic rod close to the opening, and the second telescopic rod is arranged in the first telescopic rod; the second telescopic rod is hollow and is provided with an opening at one end, a first sliding block is arranged at the bottom of the outer surface of the first telescopic rod close to the tail end position so that the second telescopic rod can slide in the first telescopic rod, a second limiting block is arranged at the top of the second telescopic rod and is used for being matched with the first limiting block to position the second telescopic rod, a third limiting block is arranged at the top surface of the inner surface of the first telescopic rod close to the opening position, and a third telescopic rod is arranged in the second telescopic rod; the bottom of the position, close to the tail end, of the outer surface of the third telescopic rod is provided with a second sliding block, so that the third telescopic rod can slide inside the second telescopic rod, and the top of the third telescopic rod is provided with a fourth limiting block used for being matched with the third limiting block to position the first telescopic rod.

Further optionally, two ends of the first connecting piece are provided with openings, two ends of each opening are respectively an opening upper edge and an opening lower edge which are tilted outwards, and a telescopic structure is fixed inside each opening; the telescopic structure comprises a first rivet, a second rivet, a connecting ring and a spring; the first rivet and the second rivet are both of I-shaped structures; the connecting ring is hollow, two ends of the connecting ring are open, and the width of the hollow part of the connecting ring is greater than the length of two ends of the pin; one end of the first rivet sequentially penetrates through the upper edge of the opening and the opening at one end of the connecting ring and is clamped in the connecting ring, and the other end of the first rivet is clamped on the outer surface of the upper edge of the opening; one end of the second rivet sequentially penetrates through the lower edge of the opening and the opening at the other end of the connecting ring and is clamped in the connecting ring, and the other end of the second rivet is clamped on the outer surface of the lower edge of the opening; the spring is sleeved on the outer surface of the connecting ring, one end of the spring abuts against the inner surface of the upper edge of the opening, and the other end of the spring abuts against the inner surface of the lower edge of the opening.

Further optionally, a hollow clamping groove is formed at one end of the outer diameter sub-testing rod, which is connected with the first connecting rod; the upper edge of the opening and the lower edge of the opening are clamped into the hollow clamping groove after being compressed, so that the outer diameter testing rod is fixed with the first connecting rod.

Further optionally, the internal diameter test pole is including adorning the fastener, it establishes to adorn the fastener the internal diameter test pole is close to the position of the stiff end of internal diameter test pole, adorn the fastener with the mounting is connected, so that the internal diameter test pole with fixed disk relatively fixed.

Further optionally, the number of the fixing pieces is one, and the fixing pieces are fixed in the middle of the top surface of the fixed disc; the fixing piece comprises a base and four clamping grooves uniformly fixed on the base, the four clamping grooves are obliquely arranged, and the vertexes of the four clamping grooves are the middle points of the base; the clamping piece is triangular and is fixed by a screw after being inserted into the clamping groove; or, the number of the fixing pieces is four, the fixing pieces are fixed on the top surface of the fixed disk far away from the circle center and are uniformly distributed on the fixed disk; the middle part of the fixing piece is provided with a vertical clamping groove; the clamping piece is in a strip shape, one end of the clamping piece is connected with the fixed end of the inner diameter testing rod, and the other end of the clamping piece is clamped in the vertical clamping groove.

Further optionally, the device further comprises a speed reducing mechanism; the speed reducing mechanism comprises a supporting frame, a steel wire, a pulley and a speed reducing block; the supporting frame is provided with a plurality of pulleys in a hanging manner, and the steel wires are sequentially hung on the pulleys; one end of the steel wire penetrates through the middle part of the outer diameter testing rod and is connected with the speed reducing block.

Further optionally, the support rod is provided with a plurality of pin holes for inserting limit pins to block the outer diameter test rod from falling.

Further optionally, the acute angle is 30 ° to 45 °.

The technical scheme has the following beneficial effects: the inner diameter and the outer diameter test tools are arranged, the inner diameter and the outer diameter of the sealing circular pad can be measured simultaneously, the size range which can be measured by the tools can be adjusted according to requirements, and the measurement requirements of the sealing circular pads with various sizes are met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an inner and outer diameter test tool provided in an embodiment of the present invention;

FIG. 2 is a schematic side view of an outer diameter test rod according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an outer diameter sub-test rod according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first connecting element according to an embodiment of the present invention;

FIG. 5 is a side view of a first connector according to an embodiment of the present invention;

FIG. 6 is a schematic view of a first rivet structure provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a link structure provided by an embodiment of the present invention;

FIG. 8 is a schematic side view of an outer diameter sub test rod according to an embodiment of the present invention;

FIG. 9 is an enlarged view of the top structure of the inner and outer diameter testing fixture provided in the embodiment of the present invention;

FIG. 10 is a schematic structural view of a fastener provided in accordance with an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a fixing tray provided in an embodiment of the present invention;

FIG. 12 is a schematic view of a card fitting structure provided by an embodiment of the invention;

FIG. 13 is a schematic view of a fixing member and a fixing plate according to another embodiment of the present invention after being assembled;

FIG. 14 is a schematic view of a card-receiving structure according to another embodiment of the present invention;

fig. 15 is a schematic structural view of a speed reducing mechanism provided in the embodiment of the invention;

fig. 16 is a schematic structural view of an inner and outer diameter testing tool according to another embodiment of the present invention.

Reference numerals: 1-fixed disc 101-45 degree inclined plane through hole 2-fixed piece 201-base 202-clamping groove 203-vertical clamping groove 3-support bar 4-inner diameter test bar 401-clamping piece 5-first outer diameter test bar 501-first connecting piece 5011-opening upper edge 5012-opening lower edge 5013-connecting ring 5014-spring 5015-first rivet 5016-second rivet 6-second outer diameter test bar 601-second connecting piece 7-outer diameter test bar 701-first telescopic rod 7011-first limiting block 702-second telescopic rod 7021-second limiting block 7022-first sliding block 7023-third limiting block 703-third telescopic rod 7031-fourth limiting block 7032-second sliding block 704-hollow clamping groove 8-support frame 9-pulley 10-speed reduction block 11-steel wire.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides an inner and outer diameter testing tool, as shown in figure 1, comprising: the testing device comprises a fixed disc 1, a fixing piece 2, a supporting rod 3, an inner diameter testing rod 4, a first outer diameter testing rod 5 and a second outer diameter testing rod 6; a fixing piece 2 is fixed on the top surface of the fixed disc 1, and a support rod 3 is vertically inserted in the middle of the bottom surface of the fixed disc 1; the inner diameter testing rod 4 penetrates through the fixed disc 1 and is obliquely fixed on the fixing piece 2, and an included angle between the inner diameter testing rod 4 and the supporting rod 3 is an acute angle; the inner diameter testing rods 4 are multiple, and the multiple inner diameter testing rods 4 are uniformly distributed on the fixed disc 1; the middle parts of the first outer diameter testing rod 5 and the second outer diameter testing rod 6 are fixed in a crossed manner, and the first outer diameter testing rod 5 and the second outer diameter testing rod 6 are connected to the supporting rod 3 in a sliding manner; the surfaces of the inner diameter test rod 4 and the outer diameter test rod are marked with scales.

As shown in fig. 1, in the present embodiment, the inner diameter test bars 4 are provided in four, and one inner diameter test bar 4 is provided on the fixed disk 1 every 90 °. The top of fixed disk 1 is provided with mounting 2, and internal diameter test pole 4 one end is passed fixed disk 1 slope and is fixed on mounting 2, makes four internal diameter test poles 4 all fix on mounting 2 with the same inclination, guarantees that sealed circular gasket can steadily landing on internal diameter test pole 4.

The bottom surface of the middle part of the fixed disc 1 is fixedly connected with a support rod 3, and the support rod 3 is perpendicular to the fixed disc 1. On bracing piece 3 slidable is connected with two external diameter test bars, and first external diameter test bar 5 passes 6 middle parts of second external diameter test bar and fixes, and first external diameter test bar 5 fixes on bracing piece 3 with 6 mutually perpendicular and middle part hookup location slidable of second external diameter test bar to make first external diameter test bar 5 and second external diameter test bar 6 landing downwards simultaneously. The first outer diameter testing rod 5 and the second outer diameter testing rod 6 are both in a horizontal state when in use, so that the sealing circular gasket can stably fall down in a horizontal state. When the sealing pad falls from the top, the outer diameter test rod falls by the pressure of the sealing pad. In the testing process, if the sealing circular gasket falls to a certain position and does not fall, the reading of the inner diameter testing rod 4 and the reading of the outer diameter testing rod at the stop position of the sealing circular gasket are recorded, so that the inner diameter data and the outer diameter data of the sealing circular gasket can be obtained simultaneously, and the problem that the inner diameter and the outer diameter of the sealing circular gasket cannot be measured simultaneously in the prior art is solved.

As an alternative implementation manner, fig. 2 is a schematic side structure view of an outer diameter testing rod according to an embodiment of the present invention, and as shown in fig. 2, the first outer diameter testing rod 5 includes a first connecting member 501 and an outer diameter sub-testing rod 7; the outer diameter sub-test rod 7 is fixed at two ends of the first connecting piece 501; the second outer diameter testing rod 6 comprises a second connecting piece 601 and the outer diameter sub testing rod 7; the outer diameter sub-test rod 7 is fixed at two ends of the second connecting piece 601; a through hole is formed in the middle of the second connecting piece 601, and the first connecting piece 501 penetrates through the through hole and is vertically fixed with the second connecting piece 601.

As shown in fig. 2, the first outer diameter test rod 5 is composed of a first connector 501 and outer diameter sub test rods 7 connected to both ends of the first connector 501. Similarly, the second outer diameter testing rod 6 is composed of a second connecting piece 601 and an outer diameter sub testing rod 7 connected with two ends of the second connecting piece 601. During installation, the first connecting piece 501 firstly passes through the through hole of the second connecting piece 601, so that the first connecting piece 501 and the second connecting piece 601 are installed and clamped, and at this time, the first connecting piece 501 and the second connecting piece 601 are in a vertical state. Then, the outer diameter sub-test rods 7 are fixed at the two ends of the first connecting piece 501 and the two ends of the second connecting piece 601, so as to complete the assembly of the first outer diameter test rod 5 and the second outer diameter test rod 6. As an alternative embodiment, the second connecting member 601 is connected to the outer diameter sub test rod 7 at both ends by screws.

Before measurement, the first outer diameter testing rod 5 and the second outer diameter testing rod 6 are pushed to the top end of the supporting rod 3.

As an optional implementation manner, fig. 3 is a schematic structural diagram of an outer diameter sub-test rod 7 provided in an embodiment of the present invention, and as shown in fig. 3, the outer diameter sub-test rod 7 includes a first telescopic rod 701, a second telescopic rod 702, and a third telescopic rod 703; the first telescopic rod 701 is hollow and has an opening at one end, a first limit block 7011 is arranged at the top of the inner surface of the first telescopic rod 701, which is close to the opening, and the second telescopic rod 702 is arranged inside the first telescopic rod 701; the second telescopic rod 702 is hollow and has an opening at one end, a first sliding block 7022 is arranged at the bottom of the outer surface of the first telescopic rod 701, which is close to the tail end, so that the second telescopic rod 702 slides inside the first telescopic rod 701, a second limiting block 7021 is arranged at the top of the outer surface of the first telescopic rod 701, and is used for being matched with the first limiting block 7011 to position the second telescopic rod 702, a third limiting block 7023 is arranged on the top surface of the inner surface of the first telescopic rod 701, which is close to the opening, and a third telescopic rod 703 is arranged inside the second telescopic rod 702; the bottom of the outer surface of the third telescopic rod 703, which is close to the tail end, is provided with a second sliding block 7032, so that the third telescopic rod 703 slides inside the second telescopic rod 702, and the top is provided with a fourth limit block 7031, which is used for positioning the first telescopic rod 701 in cooperation with the third limit block 7023.

As shown in fig. 3, the outer diameter sub-test rod 7 is a telescopic structure to meet the measurement requirements of sealing round gaskets with different sizes. The base state is a state in which only the first telescopic link 701 is provided, and in this state, the third telescopic link 703 is housed in the second telescopic link 702, and the second telescopic link 702 is housed in the first telescopic link 701. When the second telescopic rod 702 and the third telescopic rod 703 are both retracted, the free ends of the first telescopic rod 701, the second telescopic rod 702 and the third telescopic rod 703 are flush.

The other state is a state in which the second telescopic rod 702 is extended, in this state, the third telescopic rod 703 is accommodated inside the second telescopic rod 702, the second telescopic rod 702 contains a scale portion which is entirely extended out of the first telescopic rod 701, and the start scale of the second telescopic rod 702 is continuous with the end scale of the first telescopic rod 701. In addition, the free end of the second telescopic rod 702 in this state is flush with the free end of the third telescopic rod 703.

The third state is a state in which the second telescopic rod 702 and the third telescopic rod 703 are extended, in this state, the second telescopic rod 702 includes a scale portion and is entirely extended out of the first telescopic rod 701, the third telescopic rod 703 includes a scale portion and is entirely extended out of the second telescopic rod 702, a start scale of the second telescopic rod 702 is continuous with an end scale of the first telescopic rod 701, and a start scale of the third telescopic rod 703 is continuous with an end scale of the second telescopic rod 702.

The first telescopic rod 701 has an open end and a hollow interior. The inner space of the first telescopic rod 701 is used for accommodating the second telescopic rod 702, and a first limit block 7011 is fixed at the top of the position, close to the opening, of the inner surface of the first telescopic rod 701. The outer surface of the first telescopic rod 701 is marked with scales.

The second extension rod 702 has an open end and a hollow interior. The inner space of the second telescopic rod 702 is used for accommodating the third telescopic rod 703, the top of the outer surface of the second telescopic rod, which is close to the tail end, is provided with a second limit block 7021, when the second telescopic rod 702 is pulled out of the first telescopic rod 701, the first limit block 7011 blocks the second limit block 7021, so that the second telescopic rod 702 cannot continue to extend out of the inner part of the first telescopic rod 701, and the second telescopic rod 702 is positioned. The first sliding block 7022 is arranged at the bottom of the outer surface of the second telescopic rod 702, and the first sliding block 7022 facilitates the second telescopic rod 702 to slide back and forth inside the first telescopic rod 701. In addition, a third limit block 7023 is fixed on the top of the inner surface of the second telescopic rod 702 near the opening. The outer surface of the second extension pole 702 is marked with scales.

The third telescopic rod 703 is accommodated inside the second telescopic rod 702, a fourth limit block 7031 is arranged at the top of the outer surface of the third telescopic rod, which is close to the tail end of the third telescopic rod 703, and when the third telescopic rod 703 is pulled out of the second telescopic rod 702, the third limit block 7023 blocks the fourth limit block 7031, so that the third telescopic rod 703 cannot extend out of the inside of the second telescopic rod 702 continuously, and the third telescopic rod 703 is positioned. The second sliding block 7032 is arranged at the bottom of the outer surface of the third telescopic rod 703, and the second sliding block 7032 facilitates the third telescopic rod 703 to slide back and forth inside the second telescopic rod 702.

As an alternative implementation manner, fig. 4 is a schematic structural diagram of a first connector 501 according to an embodiment of the present invention, as shown in fig. 4, two ends of the first connector 501 are open, an upper opening edge 5011 and a lower opening edge 5012 that are tilted outward are respectively arranged at two ends of the opening, and a retractable structure is fixed inside the opening; the telescopic structure includes a first rivet 5015, a second rivet 5016, a connection ring 5013, and a spring 5014; the first rivet 5015 and the second rivet 5016 are both in an I-shaped structure; the connecting ring 5013 is hollow and has two open ends, and the width of the hollow part is larger than the length of the two ends of the pin; one end of the first rivet 5015 sequentially penetrates through the opening upper edge 5011 and an opening at one end of the connecting ring 5013 and is clamped in the connecting ring 5013, and the other end of the first rivet 5015 is clamped on the outer surface of the opening upper edge 5011; one end of the second rivet 5016 sequentially penetrates through the lower opening edge 5012 and the opening at the other end of the connecting ring 5013 and is clamped in the connecting ring 5013, and the other end of the second rivet 5016 is clamped on the outer surface of the lower opening edge 5012; the spring 5014 is sleeved on the outer surface of the connecting ring 5013, one end of the spring abuts against the inner surface of the opening upper edge 5011, and the other end of the spring abuts against the inner surface of the opening lower edge 5012.

As shown in fig. 4, the opening at both ends of the first connecting member 501 is provided with a retractable structure. Fig. 5 is a side view schematically illustrating a first connector 501 according to an embodiment of the present invention, as shown in fig. 4 and 5, in this embodiment, a telescopic structure is composed of a connection ring 5013, a first rivet 5015, a second rivet 5016, and a spring 5014. Fig. 6 is a schematic structural view of the first rivet 5015 according to an embodiment of the present invention, and as shown in fig. 6, the first rivet 5015 has an "i" shape, and the second rivet 5016 has an "i" shape, which is the same as the first rivet 5015. Fig. 7 is a schematic structural view of a connection ring 5013 according to an embodiment of the present invention, and as shown in fig. 7, the connection ring 5013 has a structure that both ends are opened and the interior is hollow. One end of the first rivet 5015 penetrates through the upper edge 5011 of the opening and the opening at the upper end of the connecting ring 5013 and is clamped in the connecting ring 5013, and the other end of the first rivet is clamped on the outer surface of the opening edge; the second rivet 5016 has one end passing through the opening lower edge 5012 and the lower end opening of the connection ring 5013 and fitted to be caught in the connection ring 5013 and the other end fitted to be caught on the outer surface of the opening lower edge 5012. Additionally, a spring 5014 is sleeved outside the connecting ring 5013 and has one end disposed against the inner surface of the upper edge 5011 of the opening and the other end disposed against the inner surface of the lower edge 5012 of the opening.

In practical application, the upper edge 5011 of the opening and the lower edge 5012 of the opening are compressed at the same time to compress the spring 5014, so that the size of the opening is reduced, and the clamping of the first connector 501 is facilitated. Wherein the opening upper edge 5011 and the opening lower edge 5012 are in an extreme compression state when they are compressed to both ends of the connection ring 5013.

As an optional implementation manner, fig. 8 is a schematic side structure view of the outer diameter sub-test rod 7 according to the embodiment of the present invention, and as shown in fig. 8, a hollow clamping groove 704 is formed at one end of the outer diameter sub-test rod 7, which is connected to the first connection rod; the opening upper edge 5011 and the opening lower edge 5012 are compressed and then clamped into the hollow clamping groove 704, so that the outer diameter test rod is fixed to the first connecting rod.

As shown in fig. 8, one end of the outer diameter testing rod is provided with a hollow slot 704, the hollow slot 704 is in a shape of a Chinese character 'tu', one end of the first connector 501 enters the hollow slot 704 by compressing the upper opening edge 5011 and the lower opening edge 5012 of the first connector 501, and after the upper opening edge 5011 and the lower opening edge 5012 are released, the upper opening edge 5011 and the lower opening edge 5012 are tilted towards two sides, so that the outer diameter testing rod 7 can be clamped inside the hollow slot 704, and the purpose of connecting two ends of the first connector 501 with the outer diameter testing sub-rod 7 can be achieved.

As an optional implementation manner, the inner diameter testing rod 4 includes a clamping piece 401, the clamping piece 401 is arranged at a position where the inner diameter testing rod 4 is close to the fixed end of the inner diameter testing rod 4, and the clamping piece 401 is connected with the fixing piece 2, so that the inner diameter testing rod 4 and the fixing disc 1 are relatively fixed.

The inner diameter test rod 4 is fixed with a chucking member 401 through a portion of the fixed plate 1, and the chucking member 401 is fixed at a position near the fixed end. The clamping piece 401 is connected to the fixing piece 2, and the assembling requirement is met.

As an alternative embodiment, the fixing member 2 is one and is fixed in the middle of the top surface of the fixed disk 1; the fixing part 2 comprises a base 201 and four clamping grooves 202 uniformly fixed on the base 201, wherein the four clamping grooves 202 are obliquely arranged, and the vertexes are the midpoints of the base 201; the clamping piece 401 is triangular and is fixed by a screw after being inserted into the clamping groove 202; or, the number of the fixing pieces 2 is four, the fixing pieces are fixed on the top surface of the fixed disk 1 far away from the circle center, and the fixing pieces are uniformly distributed on the fixed disk 1; the middle part of the fixing piece 2 is provided with a vertical clamping groove 203; the clamping piece 401 is in a strip shape, one end of the clamping piece is connected with the fixed end of the inner diameter testing rod 4, and the other end of the clamping piece is clamped in the vertical clamping groove 203; wherein, the clamping piece 401 and the inner diameter testing rod 4 form a preset angle.

As an alternative implementation manner, fig. 9 is an enlarged view of a top structure of an inner and outer diameter testing fixture provided in an embodiment of the present invention, fig. 10 is a schematic structural view of a fixing element 2 provided in an embodiment of the present invention, and as shown in fig. 9 and fig. 10, a base 201 of the fixing element 2 is fixed in the middle of a fixed disk 1. The number of the clamping grooves 202 is four, and the four clamping grooves are arranged in one-to-one correspondence with the four inner diameter test rods 4. The top ends of the four card-receiving slots 202 meet at a point, making the card-receiving slots 202 in an inclined configuration. Fig. 11 is a plan view of the fixed disk 1 according to the embodiment of the present invention, and as shown in fig. 11, the fixed disk 1 is provided with a 45 ° inclined through hole 101, and the fixed end of the inner diameter test rod 4 passes through the 45 ° inclined through hole 101. Fig. 12 is a schematic structural view of a card-holding member 401 according to an embodiment of the present invention, as shown in fig. 12, the card-holding member 401 is triangular, a screw hole is provided in the middle, and after the inner diameter testing rod 4 passes through the fixing disc 1, the triangular card-holding member 401 is fixed on the card-holding groove 202 of the fixing member 2 to fix the inner diameter testing rod 4. As an alternative embodiment, semicircular clamping grooves are arranged on two sides inside the clamping groove 202 of the fixing piece 2, and the semicircular clamping grooves are matched with the semicircular bulges at the corresponding positions of the inner diameter test rod 4 to realize clamping of the inner diameter test rod 4. So can be when not using this frock, demolish internal diameter test rod 4 from mounting 2, make internal diameter test rod 4 free fall, convenient storage.

As an alternative implementation manner, fig. 13 is a schematic structural view of the fixing element 2 and the fixed disk 1 provided in another embodiment of the present invention after being assembled, as shown in fig. 13, the fixing elements 2 are uniformly distributed in four directions of the fixed disk 1, the fixed disk 1 is provided with 45 ° inclined plane through holes 101, and the fixed end of the inner diameter test rod 4 passes through the 45 ° inclined plane through holes 101. Fig. 14 is a schematic structural view of a card holder 401 according to another embodiment of the present invention, as shown in fig. 14, the card holder 401 is a strip shape, and the strip-shaped card holder 401 is inserted into the vertical slot 203 to fix the inner diameter test rod 4. Since the fixing member 2 is spaced apart from the 45 ° slope through hole 101 and the fixing member 2, the inner diameter side rod can be obliquely fixed. As an optional implementation manner, semicircular clamping grooves are formed in two sides of the interior of the vertical clamping groove 203, and the semicircular clamping grooves are matched with the semicircular protrusions at the corresponding positions of the inner diameter testing rod 4 to clamp the inner diameter testing rod 4. So can be when not using this frock, demolish internal diameter test rod 4 from mounting 2, make internal diameter test rod 4 free fall, convenient storage.

As an alternative implementation manner, fig. 15 is a schematic structural diagram of a speed reducing mechanism provided in the embodiment of the present invention, and as shown in fig. 15, the speed reducing mechanism is further included; the speed reducing mechanism comprises a supporting frame 8, a steel wire 11, a pulley 9 and a speed reducing block 10: a plurality of pulleys 9 are hung on the supporting frame 8, and the steel wires 11 are sequentially hung on the pulleys 9; one end of the steel wire 11 penetrates through the middle part of the outer diameter testing rod and is connected with the speed reducing block 10.

As shown in fig. 15, the speed reducing mechanism includes a plurality of pulleys 9, wherein the pulleys 9 include fixed pulleys and/or movable pulleys, and are connected with the speed reducing block 10 through the steel wires 11, and the outer diameter testing rod is connected in series to the speed reducing mechanism through the support rod 3, so as to delay the falling speed of the outer diameter testing rod and improve the measurement accuracy. As an optional implementation mode, the middle part of the outer diameter testing rod is provided with a through hole for the steel wire 11 to pass through, the top of the supporting rod 3 is provided with a wire passing block, and the bottom of the supporting rod is provided with a wire fixing block to prevent the outer diameter testing rod from moving.

As an optional implementation manner, a plurality of pin holes are formed in the support rod 3, and are used for inserting limit pins to block the outer diameter test rod from falling.

When sealed circular gasket stopped the whereabouts, the external diameter test rod was because there is the action of gravity in addition, consequently can continue the whereabouts, for making the external diameter test rod can accurate reading, need move up the external diameter test rod until hugging closely the lower surface of sealed circular gasket through external force, insert the whereabouts trend of spacing pin in order to prevent the external diameter test rod at the lower part bracing piece 3 of external diameter test rod this moment, and then to the external diameter reading of sealed circular gasket.

As an alternative embodiment, the acute angle is 30 ° to 45 °.

The first embodiment is as follows: as shown in fig. 1, the inner and outer diameter testing tool comprises a fixed disc 1, a fixing piece 2, a support bar 3, an inner diameter testing bar 4, a first outer diameter testing bar 5 and a second outer diameter testing bar 6. Wherein, bracing piece 3 is pegged graft perpendicularly in 1 bottom surface middle part of fixed disk, and mounting 2 is fixed in 1 top surface middle part of fixed disk, evenly distributed four 45 inclined plane through-holes 101 on 1 circumference of fixed disk, and 45 inclined plane through-holes 101 are passed to 4 one end of internal diameter test bar, and its triangle dress fastener 401 is fixed with the dress draw-in groove 202 of 2 slopes of mounting, and every internal diameter test bar 4 is 30 with the angle of bracing piece 3 this moment. First external diameter test rod 5 passes second external diameter test rod 6 and vertical fixation, and middle part slidable dress card is in bracing piece 3 to first external diameter test rod 5 can the landing simultaneously with second external diameter test rod 6. Wherein, the inside diameter test rod 4, the first outside diameter test rod 5 and the second outside diameter test rod 6 are all marked with corresponding scales. The inner and outer diameter test tool in the embodiment can measure the sealing circular gasket with the inner diameter of 0-phi 350 mm.

The use method of the inner and outer diameter test tool in the embodiment is as follows: before the test, with fixed disk 1 and bracing piece 3 fixed connection, internal diameter test rod 4 slant passes fixed disk 1. The four inner diameter test rods 4 are fixed on the fixing piece 2 after the tips of the four inner diameter test rods 4 are aligned to form a point, and at the moment, the angle between the inner diameter test rods 4 and the supporting rod 3 is 30 degrees.

Insert spacing pin to bracing piece 3 according to the approximate size of being surveyed the round pad, lift first external diameter test bar 5 and second external diameter test bar 6 to highest position, will await measuring the round pad and fill up to the internal diameter test bar 4 outside, let its free fall and drive first external diameter test bar 5 and the whereabouts of second external diameter test bar 6, because first external diameter test bar 5, the 6 combined action of second external diameter test bar, being surveyed the round pad and will keeping the horizontality whereabouts, until unable because of gravity whereabouts, at this moment, the internal diameter can directly be read, and the external diameter test bar can slowly drop, stop until being blockked by the spacer pin, read the reading of external diameter test bar this moment.

The second embodiment is as follows: as shown in fig. 16, compared with the first embodiment, the difference is that the size of the fixing plate 1 in this embodiment is larger, and four fixing members 2 are provided, corresponding to the 45 ° inclined through holes 101. The inner diameter test rod 4 passes through the 45-degree inclined plane through hole 101, and the strip-shaped clamping piece 401 of the inner diameter test rod is fixed with the vertical clamping groove 203 of the fixing piece 2. The angle between each inner diameter test rod 4 and the support rod 3 is 45 degrees. The inner and outer diameter test tool can measure a sealing circular pad with the inner diameter of 300-1000 mm.

The use method of the inner and outer diameter test tool in the embodiment is as follows: before the test, with fixed disk 1 and bracing piece 3 fixed connection, internal diameter test rod 4 slant passes fixed disk 1. Four inner diameter test rods 4 are fixed on the fixing piece 2, and at the moment, the angles between the inner diameter test rods 4 and the supporting rod 3 are 45 degrees.

Insert spacing pin to bracing piece 3 according to the approximate size of being surveyed the round pad, lift first external diameter test bar 5 and second external diameter test bar 6 to highest position, will await measuring the round pad and fill up to the internal diameter test bar 4 outside, let its free fall and drive first external diameter test bar 5 and the whereabouts of second external diameter test bar 6, because first external diameter test bar 5, the 6 combined action of second external diameter test bar, being surveyed the round pad and will keeping the horizontality whereabouts, until unable because of gravity whereabouts, at this moment, the internal diameter can directly be read, and the external diameter test bar can slowly drop, stop until being blockked by the spacer pin, read the reading of external diameter test bar this moment.

In addition, the measuring range of the tool in the first embodiment partially coincides with that of the tool in the second embodiment, so that the influence on the measuring precision caused by the deformation of the bottom end of the testing rod due to the overweight of the sealing ring and the round pad is avoided, when the diameter of the section of the sealing ring or the thickness of the round pad exceeds 3mm in specific use, the tool with the measuring range of phi 300-phi 1000mm is selected, and otherwise, the tool with the measuring range of 0-phi 350mm can be selected.

The technical scheme has the following beneficial effects: the inner diameter and the outer diameter test tools are arranged, the inner diameter and the outer diameter of the sealing circular pad can be measured simultaneously, the size range which can be measured by the tools can be adjusted according to requirements, and the measurement requirements of the sealing circular pads with various sizes are met.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.