1. The utility model provides an erecting tool of oil blanket pressure equipment, includes the cap, has seted up the cavity on the cap, has placed oil blanket circle in the cavity, its characterized in that: the mould also comprises an outer sleeve, wherein a first pit is formed in the middle of the bottom surface of the outer sleeve, an inner sleeve is arranged in the first pit, and the inner sleeve elastically pushes the first pit for demoulding;

the inner sleeve penetrates through the oil seal ring, and the bottom surface of the outer sleeve is attached to the end surface of the oil seal ring.

2. The oil seal press-fitting mounting tool according to claim 1, wherein: a first through hole is formed in the top wall of the first pit in the outer sleeve, an annular top block protrudes from the bottom surface of the outer sleeve, and the bottom surface of the top block is attached to the end face of the oil seal ring;

the pull rod is also provided with threaded holes on two end faces;

a second pit is formed in the top surface of the inner sleeve in a sunken mode, a second through hole penetrating through the whole is formed in the bottom surface of the second pit, and the outer surface of the inner sleeve is sunken to form an annular first step;

the locking gasket is provided with a third through hole;

the bolt penetrates through the first through hole to be fixedly connected with one end of the pull rod in a threaded manner, the pull rod is sleeved with a pressure spring, the pull rod is inserted into the inner sleeve in a penetrating manner, the pressure spring is pressed against the bottom surface of the second pit, the upper surface of the locking gasket is attached to the lower surface of the outer sleeve, and the screw penetrates through the third through hole to be fixedly connected with the other end of the pull rod in a threaded manner; the lip edge of the oil seal ring is arranged between the top block and the inner sleeve.

3. The oil seal press-fitting mounting tool according to claim 2, characterized in that: the edge of the bottom surface of the outer sleeve is provided with an annular second step; the edge of the first step is provided with an inclined avoiding surface.

4. The oil seal press-fitting mounting tool according to claim 2, characterized in that: the inner wall of the first pit is provided with an air hole penetrating the whole body.

5. The oil seal press-fitting mounting tool according to claim 4, wherein: the inner wall of the first pit is sunken to form an annular first groove, and the air hole is formed in the first groove.

6. The oil seal press-fitting mounting tool according to claim 2, characterized in that: the outer surface of the outer sleeve is recessed with an annular second groove.

Background

At present, step-by-step assembly is generally adopted in the assembly of oil seals in the field of automobile manufacturing, namely: step one, completing press fitting of an interference fit surface; in the second step, the assembly of the seal (shaft or bore) is completed. Under the production scene that assembly needs to be completed in one step, certain direction requirements are provided for the assembly direction of the sealing element: the oil seal is required to be assembled in a forward direction (namely, the sealing lip is led in preferentially in the assembling process, alpha is more than 90 degrees, see figure 1), and the oil seal lip is prevented from being damaged.

However, in the actual production, the oil seal ring cannot be assembled forwardly due to the shape of the cavity on the shell cover, and only can be assembled reversely; firstly, righting the oil seal ring on a cavity of a shell cover, and then extruding the oil seal ring by a hydraulic device to be embedded into the shell cover; in the pressing process, the lip edge of the bulge is firstly extruded, so that the problems of lip edge damage, cracking, flanging and the like can be caused; the flexible assembly convenience and the equipment purchasing cost are greatly limited.

Disclosure of Invention

The invention aims to provide an installation tool for press mounting of an oil seal, which is matched with an oil seal ring structure to protect the oil seal ring and is assembled into a shell cover in a 'reverse' manner.

In order to solve the technical problem, the invention aims to realize that:

an installation tool for press mounting of an oil seal comprises a shell cover, an outer sleeve and a first concave pit, wherein a cavity is formed in the shell cover, an oil seal ring is placed in the cavity, a first concave pit is formed in the middle of the bottom surface of the outer sleeve, an inner sleeve is arranged in the first concave pit, and the inner sleeve elastically pushes the first concave pit for demolding; the inner sleeve penetrates through the oil seal ring, and the bottom surface of the outer sleeve is attached to the end surface of the oil seal ring.

On the basis of the above scheme and as a preferable scheme of the scheme: a first through hole is formed in the top wall of the first pit in the outer sleeve, an annular top block protrudes from the bottom surface of the outer sleeve, and the bottom surface of the top block is attached to the end face of the oil seal ring; the pull rod is also provided with threaded holes on two end faces; a second pit is formed in the top surface of the inner sleeve in a sunken mode, a second through hole penetrating through the whole is formed in the bottom surface of the second pit, and the outer surface of the inner sleeve is sunken to form an annular first step; the locking gasket is provided with a third through hole; the bolt penetrates through the first through hole to be fixedly connected with one end of the pull rod in a threaded manner, the pull rod is sleeved with a pressure spring, the pull rod is inserted into the inner sleeve in a penetrating manner, the pressure spring is pressed against the bottom surface of the second pit, the upper surface of the locking gasket is attached to the lower surface of the outer sleeve, and the screw penetrates through the third through hole to be fixedly connected with the other end of the pull rod in a threaded manner; the lip edge of the oil seal ring is arranged between the top block and the inner sleeve.

On the basis of the above scheme and as a preferable scheme of the scheme: the edge of the bottom surface of the outer sleeve is provided with an annular second step; the edge of the first step is provided with an inclined avoiding surface.

On the basis of the above scheme and as a preferable scheme of the scheme: the inner wall of the first pit is provided with an air hole penetrating the whole body.

On the basis of the above scheme and as a preferable scheme of the scheme: the inner wall of the first pit is sunken to form an annular first groove, and the air hole is formed in the first groove.

On the basis of the above scheme and as a preferable scheme of the scheme: the outer surface of the outer sleeve is recessed with an annular second groove.

Compared with the prior art, the invention has the outstanding and beneficial technical effects that:

compared with the prior art, the mounting tool for press mounting of the oil seal is composed of an outer sleeve, an inner sleeve, a pull rod, a pressure spring and a locking gasket, and is simple in structure and reliable in mounting quality.

The top block on the outer sleeve is used for jacking the oil seal ring and pre-installing and fixing effects; the inner sleeve plays a role in stripping materials, is elastically matched in the first concave pit, and further realizes complete assembly of the oil seal once on the premise of reverse assembly, and can also take into account the assembly quality effect and improve the finished product yield of the pressed oil seal ring.

And in different stages of press mounting, the automatic alignment of the oil seal in sections is realized by utilizing the appearance sizes of the oil seal with different accuracies. Under the requirement of flexible assembly, the device can be better compatible with various types, and the redundancy of equipment investment is avoided. In the aspect of process, the assembly link can be greatly simplified.

The problem of the oil blanket assembly fixture in automobile assembling technical field, especially under the reverse assembly demand of oil blanket seal lip is solved, it has higher practical value to require simultaneously to assemble under the production scene of accomplishing inside and outside footpath installation once.

Drawings

Fig. 1 is a schematic structural view of an oil seal ring.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic diagram of the overall explosive structure of the present invention.

Fig. 4 is a schematic view of the mounting structure of the housing cover and the oil seal ring of the present invention.

Fig. 5 is a schematic view of the structure of the jacket of the present invention.

Fig. 6 is a schematic diagram of the inner sleeve structure of the present invention.

Fig. 7 is a schematic view of the structure of the tie bar of the present invention.

Fig. 8 is a schematic view of the lock washer construction of the present invention.

Fig. 9 is an overall sectional structural view of the present invention.

FIG. 10 is a partial sectional view of the cover.

Reference numerals: a shell cover 01; a cavity 010; an oil seal ring 02; an end face 020; the lip edges 021; a jacket 03; a first pit 030; first through hole 0300; air vent 0301; first groove 0302; a top block 031; a second step 032; a second recess 033; an inner sleeve 04; the second pits 040; a second through hole 041; a first step 042; an avoidance surface 0420; a pull rod 05; a threaded hole 050; a lock washer 06; a third through hole 060; a bolt 07; a pressure spring 08; a screw 09;

Detailed Description

The invention will be further described in the following with specific embodiments in conjunction with the accompanying drawings;

the embodiment provides an installation tool for press mounting of an oil seal, which comprises a shell cover 01, wherein a cavity 010 is formed in the shell cover 01, an oil seal ring 02 is placed in the cavity 010, the installation tool further comprises an outer sleeve 03, a first pit 030 is formed in the middle of the bottom surface of the outer sleeve 03, an inner sleeve 04 is arranged in the first pit 030, and the inner sleeve 04 can move up and down in the first pit 030; the inner sleeve 04 is elastically pressed in the first pit 030 for demoulding;

the inner sleeve 04 penetrates through the oil seal ring 02, and the bottom surface of the outer sleeve 03 is attached to the end surface 020 of the oil seal ring 02.

As described above, the oil seal ring 02 is placed on the housing cover 01, the outer sleeve 03 covers and presses against the end face 020 of the oil seal ring 02, and the inner sleeve 04 penetrates through the oil seal ring 02; the outer sleeve 03 descends under the action of downward external force, the inner sleeve 04 descends synchronously, the bottom of the inner sleeve 04 is gradually pressed against the part on the shell cover 01, the inner sleeve 04 is elastically pressed in the first pit 030 and is deeply inserted into the first pit 030, the oil seal ring 02 is reversely installed, and the downward external force is removed; the outer sleeve 03 moves upwards under the elastic pressure of the inner sleeve 04, is separated from the oil seal ring 02, and the outer sleeve 03 can be taken down from the shell cover 01.

The installation tool is additionally arranged between the original oil seal ring 02 and the external force pressing-in part, the extrusion is carried out successively, the extrusion is transmitted to the oil seal ring 02 and is pressed in, meanwhile, the outer sleeve 03 only extrudes the end face 020 of the oil seal ring 02, a metal framework is arranged inside the end face 020 of the oil seal ring 02 and can bear pressure, and the existing mode that the lip edge 021 is directly stamped is avoided.

Further, a first through hole 0300 is formed in the top wall of the first pit 030 in the outer sleeve 03, and preferably, the first through hole 0300 is a counter bore; an annular top block 031 protrudes from the bottom surface of the outer sleeve 03, and the bottom surface of the top block 031 is attached to the end surface 020 of the oil seal ring 02; the width dimension of the top block 031 is selected according to different oil seal rings 02, and the top block 031 protrudes out of the bottom surface of the outer sleeve 03 to form a height difference so as to avoid contacting with a lip edge 021 on the oil seal ring 02;

the pull rod 05 is further included, and threaded holes 050 are formed in two end faces 020 of the pull rod 05; the pull rod 05 has a middle connection function and also has a limiting effect on the inner sleeve 04, so that the inner sleeve 04 in the first pit 030 is prevented from deviating in the pressing-in process; the threaded holes 050 on the two end surfaces 020 of the pull rod 05 are consistent in structure and can be used up and down;

a second pit 040 is recessed in the top surface of the inner sleeve 04, and a pressure spring 08 is placed in the second pit 040; the bottom surface of the second pit 040 is provided with a second through hole 041 penetrating the whole body, and the size of the second through hole 041 is matched with that of the pull rod 05; the outer surface of the inner sleeve 04 is sunken to form an annular first step 042; the first step 042 is used for jacking and stressing parts on the shell cover 01 to realize the contraction of the pressure spring 08 or the stripping of the outer sleeve 03;

the locking device further comprises a locking gasket 06, and a third through hole 060 is formed in the locking gasket 06; the locking gasket 06 plays a limiting role; the third through bore 060 is preferably a counterbore; the size of the locking gasket 06 is matched with the size of the bottom of the inner sleeve 04;

the bolt 07 penetrates through the first through hole 0300 to be fixedly connected with one end of the pull rod 05 through threads, the pull rod 05 is fixed in the first pit 030, and the bolt connection mode is adopted, so that the disassembly, assembly and replacement can be realized; a pressure spring 08 is sleeved on the pull rod 05, the pull rod 05 is inserted into the inner sleeve 04, the pressure spring 08 pushes against the bottom surface of the second pit 040, and the inner sleeve 04 is elastically stressed in the first pit 030 through the pressure spring 08;

in another embodiment, the pressure spring 08 can be replaced by an elastic rubber ring, and the inner sleeve 04 can be elastically pressed in the first recess 030;

the upper surface of the locking gasket 06 is attached to the lower surface of the outer sleeve 03, and the screw 09 penetrates through the third through hole 060 to be fixedly connected with the other end of the pull rod 05 through threads; the locking gasket 06 is bolted to the bottom of the pull rod 05 through a screw 09, so that the inner sleeve 04 is limited and cannot fall out;

the lip edge 021 of the oil seal ring 02 is arranged between the top block 031 and the inner sleeve 04, so that the lip edge 021 is prevented from contacting other parts on the oil seal ring 02, the lip edge 021 can be completely pressed out, and the situations of flanging, breakage and fracture cannot occur;

as described above, the bottom surface of the outer sleeve 03 protrudes out of the top block 031 for pressing the oil seal ring 02; the pull rod 05 is fixed in a first pit 030 of the outer sleeve 03 through a bolt 07, the pull rod 05 is inserted into the inner sleeve 04, the pull rod 05 is sleeved with a pressure spring 08, and the inner sleeve 04 is elastically pressed in the first pit 030; the first step 042 on the inner sleeve 04 realizes material removal;

further, an annular second step 032 is formed at the edge of the bottom surface of the outer sleeve 03; the edge of the first step 042 is provided with an inclined avoiding surface 0420.

As described above, the second step 032 is provided at the edge of the outer sleeve 03 to form the height H; the outer sleeve 03 presses the straight oil seal ring 02 down to the required depth H, the second step 032 is supported by the shell cover 01 and cannot go down continuously, the oil seal ring 02 is protected, and excessive pressing is avoided;

an avoiding surface 0420 is cut on the first step 042, so that the contact with an upper lip edge 021 of the oil seal ring 02 can be reduced, and extrusion touch is not caused;

in the using process, in consideration of cleanliness, the end face 020 of the oil seal ring 02 is not installed and limited by magnetism; and in view of assembly precision, the outer annular surface of the oil seal is not used for installation and limiting.

As shown in the figure, the 'segmented automatic alignment' is adopted: in the initial installation and press mounting section of the oil seal ring 02, a dust cover (A) with low precision of the oil seal ring 02 is used for installation and limiting, and the outer diameter (D) of the inner sleeve 04 is matched for righting and limiting the tool, so that the oil seal ring 02 is horizontally pressed downwards; in the middle section of the press mounting of the oil seal ring 02, the outer diameter surface (the end part B is provided with a chamfer) of the oil seal ring 02 with better size precision is used for secondary alignment. And finally, at the tail end of the press mounting of the oil seal ring 02, the tool outer sleeve 03H section with higher precision is pressed into the part hole for positioning, and meanwhile, the oil seal ring 02 is guaranteed to jump after being pressed into the part hole by the end face 020, so that the requirements are met. The functional lip 021C of the oil seal ring 02 cannot contact with a tool in the assembling process.

Further, the inner wall of the first pit 030 is provided with an air hole 0301 penetrating the whole body.

As described above, the air holes 0301 are used for air to enter and exit from the first pit 030, when the inner sleeve 04 ascends in the first pit 030, the air is discharged from the air holes 0301, and the pressure spring 08 can be compressed more tightly;

further, the inner wall of the first pit 030 is recessed to form an annular first groove 0302, and the air hole 0301 is formed in the first groove 0302.

As described above, the first grooves 0302 can store part of the gas, so as to prevent the inner sleeve 04 from forming a vacuum in the first recess 030 and being unable to move;

further, an annular second groove 033 is recessed in an outer surface of the outer sleeve 03.

As mentioned above, the second recess 033 facilitates grasping by a person.

The use method of the mounting tool for oil seal press mounting comprises the steps that in the first step, an outer sleeve 03, an inner sleeve 04, a pull rod 05, a pressure spring 08 and a locking gasket 06 are assembled together; oil seal rings 02 of different shapes and specifications and parts with different sizes are selected;

secondly, the oil seal ring 02 is preassembled between the outer sleeve 03 and the inner sleeve 04 and is fixed by clamping;

thirdly, the whole installation tool is placed on the shell cover 01, the press descends to press the outer sleeve 03, the whole installation tool descends, and the second step 032 of the inner sleeve 04 is pressed against the part on the shell cover 01; under the action of external force, the inner sleeve 04 compresses the pressure spring 08 along the pull rod 05, and meanwhile, the outer sleeve 03 is pressed down until the oil seal ring 02 is pressed to the required depth H, so that pressing-in is completed; the external force is removed, the pressure spring 08 is released, and the outer sleeve 03 is ejected out to strip the materials;

and fourthly, taking down the mounting tool.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, refer to orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.