1. A main chassis enclosure, comprising: including main part grillage (1) and curb plate (2), main part grillage (1) includes mainboard (11), back plate (12) and two sideboard (13), back plate (12) and sideboard (13) are turned over by mainboard (11) and are rolled over and form, sideboard (13) are formed with butt portion (131) that are used for supporting back plate (12) towards one side border buckling of back plate (12), butt portion (131) is connected in back plate (12), one side border bending type that mainboard (11) were kept away from in sideboard (13) forms scrap (132), curb plate (2) are drawn and are riveted and are connected in scrap (132), curb plate (2) and main part grillage (1) enclose to establish and form one side open-ended box structure.

2. The main cabinet housing of claim 1, wherein: the side plate (2) is bent towards one side edge of the rear plate (12) to form a bridging plate (21), and the bridging plate (21) is connected to the abutting part (131).

3. The main cabinet housing of claim 2, wherein: be provided with function support (3) and baffle (4) in main part grillage (1), baffle (4) both sides border is connected respectively in two sideboard (13), function support (3) are connected in sideboard (13) and function support (3) butt and are kept away from one side border of back plate (12) in baffle (4), baffle (4) are formed with supporting part (41) towards one side border bending type of back plate (12), supporting part (41) are connected in back plate (12).

4. The host enclosure of claim 3, wherein: the side plate is characterized in that the partition plate (4) is bent towards the two side edges of the side plate (13) to form a connecting side portion (42), the side plate (13) is provided with a tensioning riveting hole (101) used for fixedly connecting the side portion (42), the tensioning riveting hole (101) is of a conical hole-shaped structure, the small end of the tensioning riveting hole faces towards the connecting side portion (42), and the connecting side portion (42) is connected with the side plate (13) in a tensioning riveting mode.

5. The utility model provides a location frock which characterized in that: including locating plate (6), draw-in groove (61) and operation hole (62) have been seted up in locating plate (6), operation hole (62) run through locating plate (6) and operation hole (62) and the rivet pulling position of curb plate (2) is corresponding.

6. The positioning tool according to claim 5, characterized in that: locating plate (6) are provided with joint subassembly (7), joint subassembly (7) are including limiting plate (71) and elastic clip (72), limiting plate (71) fixed connection is in one side border of locating plate (6), clip (72) are connected in limiting plate (71).

7. The positioning tool according to claim 6, characterized in that: movable hole (711) have been seted up in limiting plate (71), clasp (72) include connecting portion (721) and connect in buckling part (722) of connecting portion (721), buckling part (722) are arc sheet structure, joint subassembly (7) still include the pulling pole (73) of connecting in buckling part (722), pulling pole (73) wear to establish and slide and connect in movable hole (711).

8. The positioning tool according to claim 7, characterized in that: limiting plate (71) are provided with air-blowing subassembly (8), air-blowing subassembly (8) include blast pipe (81) and are used for shutoff blast pipe (81) one end open-ended fixed plate (82), blast pipe (81) one end opening border is connected in fixed plate (82), the other end opening border of blast pipe (81) is connected in one side of limiting plate (71) clip (72) dorsad, activity hole (711) communicate in the inner chamber of blast pipe (81) and activity hole (711) diameter is greater than the diameter of pulling pole (73), pulling pole (73) are worn to locate fixed plate (82) and pulling pole (73) and are slided and connect in fixed plate (82).

9. The positioning tool according to claim 8, characterized in that: one end, far away from the buckling part (722), of the pulling rod (73) is connected with a limiting block (731), and the limiting block (731) abuts against one side, back to the limiting plate (71), of the fixing plate (82).

Background

With the rapid development of electronic technology, a main chassis integrated with a processing circuit main board is applied to various fields, and the size and shape of a main chassis housing can be changed adaptively according to the different fields. In particular, in the field of medical devices, the main housing requires higher precision and structural strength, while also requiring a more compact structure that is compatible with other components of the medical device.

The mainframe box shell in the related art is mostly assembled by adopting a plurality of plate bodies and frames for supporting the plate bodies, and because the processing processes of the frames and the plate bodies belong to different processes, errors generated after assembly and splicing are relatively large, so that the precision is difficult to meet the use in the field of medical appliances; in addition, its assembled mode adopts simple screw to twist to connect mostly to assemble, and the screw concatenation in-process, the plate body and the frame that the polylith is different pass through the screw concatenation fixed, and this assembled mode screw only can make the centre gripping to local plate body in the concrete implementation process make the wholeness between the polylith plate body not high, and the screw is twisted and is moved the condition that the excessive tightening still can lead to taking place the skew between the polylith plate body for the structural strength after the equipment can the decline of certain degree.

Disclosure of Invention

For the structural strength of mainframe box shell under certain precision is higher, this application provides a mainframe box shell.

In a first aspect, the present application provides a mainframe box casing, which adopts the following technical scheme:

the utility model provides a mainframe box shell, includes main part grillage and curb plate, the main part grillage includes mainboard, back plate and two sideboard, back plate and sideboard are turned over a formation by the mainboard, one side border bending type of sideboard towards the back plate is formed with the butt portion that is used for supporting the back plate, butt portion connects in the back plate, one side border bending type that the mainboard was kept away from to the sideboard forms the scrap (bridge), the curb plate is drawn and is riveted and connect in the scrap (bridge), curb plate and main part grillage enclose and establish the box-packed structure that forms one side open-ended.

By adopting the technical scheme, the main board, the rear board and the two side boards are formed by bending one board body, four sides of the case shell of the main machine can be enclosed by the four boards, the integrity of the four sides is relatively higher, so that the structural strength is relatively higher, in addition, the four boards are formed by processing one board body, the error generated in the processing is relatively smaller, and the precision after the assembly can be improved; and the butt portion of sideboard can play the supporting role to the back plate again for the impact force that the back plate received can in time disperse to the sideboard, with the structural strength who improves main part grillage. Meanwhile, the connecting area of the side plate and the side plate can be increased by the aid of the lap edges, so that the side plate and the side plate are connected relatively firmly, and the lap edges can support the side plate, so that the condition that the side plate is deformed due to stress is reduced; and the overlap edge and the side plate are connected in a rivet pulling mode, a rivet pulling gun is usually adopted for rivet pulling, the force application of the rivet pulling gun is perpendicular to the plate surface of the side plate, and the overlap edge and the side plate are not easy to twist and shift in the rivet pulling process.

Optionally, one side edge of the side plate facing the rear plate is bent to form a lap plate, and the lap plate is connected to the abutting portion.

Through adopting above-mentioned technical scheme, the lap-joint plate that the curb plate was buckled can connect in butt portion, and butt portion can do the support to the lap-joint plate, and the lap-joint plate is buckled by the curb plate and forms, and the connection of lap-joint plate and butt portion can multiplicable curb plate and sideboard connection area to improve the joint strength of curb plate and sideboard.

Optionally, be provided with function support and baffle in the main part grillage, baffle both sides border is connected respectively in two sideboard, function leg joint is in sideboard and function support butt and keeps away from one side border of back plate in the baffle, the baffle is formed with the supporting part towards a side border bending type of back plate, the supporting part is connected in the back plate.

Through adopting above-mentioned technical scheme, the baffle not only can be used to place integrated circuit board, and three side edges of baffle are along the three lateral wall of the inner chamber of butt main part grillage moreover for overall structure is compacter relatively, and structural strength is higher, and the functional support can butt the baffle and keep away from one side border of back plate, makes the baffle better to the supporting effect of main part grillage inner wall.

Optionally, the partition board is bent towards the two side edges of the side board to form a connecting edge portion, the side board is provided with a tensioning riveting hole for fixedly connecting the edge portion, the tensioning riveting hole is of a conical hole-shaped structure, the small end of the tensioning riveting hole faces the connecting edge portion, and the connecting edge portion is connected with the side board in a tensioning riveting mode.

Through adopting above-mentioned technical scheme, the baffle is connected through the riveting mode that rises, and the baffle and the sideboard deformation volume of being connected by rising the riveting fixed are less, and the operation of just rising the riveting connection is more convenient relatively, and connection efficiency is higher.

In a second aspect, the present application provides a positioning tool, which adopts the following technical scheme:

the utility model provides a location frock, includes the locating plate, draw-in groove and handle hole have been seted up to the locating plate, the border of curb plate and sideboard is all blocked and is located in the draw-in groove, the handle hole runs through locating plate and handle hole and the rivet pulling position of curb plate corresponding.

Through adopting above-mentioned technical scheme, during the use, the staff with the locating plate back-off in the curb plate to make the border card of curb plate and sideboard establish in the draw-in groove, then the staff carries out curb plate and lap-joint plate rivet through the handle hole and connects, in the operation process, the draw-in groove can play the limited effect to the position of curb plate and main part grillage, thereby rivet the in-process, the difficult condition of taking place the dislocation of curb plate and main part grillage is so that connection accuracy is higher.

Optionally, the locating plate is provided with the joint subassembly, the joint subassembly includes limiting plate and elastic clip, limiting plate fixed connection is at one side border of locating plate, the clip is connected in the limiting plate, the clip lock joint is in the riveting hole that rises.

Through adopting above-mentioned technical scheme, because curb plate fixed position is the definite position, the position that the toper that generates with it rises the riveting hole also correspondingly is the definite position, when the locating plate back-off in host computer case shell, the clasp that sets up on the limiting plate can be buckled and locate and rise the riveting hole, thereby rivet the in-process, the locating plate can be held the curb plate towards main body grillage pressure, so that rivet the in-process, the curb plate can closely butt sideboard, the difficult dislocation condition that takes place, and then improve the precision after rivet.

Optionally, the movable hole has been seted up to the restriction board, the clip includes connecting portion and connects in the buckling part of connecting portion, buckling part is arc sheet structure and its interior cambered surface towards the restriction board, the joint subassembly is still including connecting in the pulling pole of buckling part, the pulling pole is worn to establish and slides and is connected in the movable hole.

Through adopting above-mentioned technical scheme, when the location frock is taken off to needs, the staff can outwards stimulate the pulling pole, and the pulling pole can make buckling part to the limiting plate retraction to relieve the location frock and to the spacing of host computer case shell, be convenient for the staff takes off the location frock.

Optionally, the limiting plate is provided with the air-blowing subassembly, the air-blowing subassembly includes the blast pipe and is used for shutoff blast pipe one end open-ended fixed plate, blast pipe one end opening border is connected in the fixed plate, the other end opening border of blast pipe is connected in the limiting plate one side of clasp dorsad, the activity hole communicates in the inner chamber of blast pipe and the activity hole diameter is greater than the diameter of pulling rod, the pulling rod is worn to locate fixed plate and pulling rod and is slided and connect in the fixed plate.

Through adopting above-mentioned technical scheme, the staff can press the fixed plate, makes the blast pipe blow off inside gas from the activity hole, and curved lock joint portion can guide the air current to blow to the cell wall of draw-in groove to blow away the piece in the cell wall, reduce the condition of piece with the outer wall fish tail of mainframe box shell.

Optionally, one end of the pulling rod, which is far away from the buckling part, is connected with a limiting block, and the limiting block abuts against one side, back to the limiting plate, of the fixing plate.

Through adopting above-mentioned technical scheme, but the restriction piece butt in the fixed plate, when staff's pulling fixed plate kept away from the restriction board, the fixed plate can drive the restriction piece and together keep away from the restriction board to the restriction piece can order about pulling pole pulling buckling part deformation, so that the staff is convenient for take off the location frock, and at this moment, the fixed plate keeps away from the in-process and also can realize the inspiratory process of blast pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the main board, the rear board and the two side boards are formed by bending a board body, and the four sides of the main case shell can be enclosed by the four sides, so that the integrity of the four sides is relatively higher, the structural strength is relatively higher, in addition, the four sides are formed by processing one board body, the error generated in the processing is relatively smaller, and the precision after the assembly is also improved; and the butt portion of sideboard can play the supporting role to the back plate again for the impact force that the back plate received can in time disperse to the sideboard, with the structural strength who improves main part grillage. Meanwhile, the connecting area of the side plate and the side plate can be increased by the aid of the lap edges, so that the side plate and the side plate are connected relatively firmly, and the lap edges can support the side plate, so that the condition that the side plate is deformed due to stress is reduced; the lap edge and the side plate are connected in a rivet pulling mode, a rivet pulling gun is usually adopted for rivet pulling, the force application of the rivet pulling gun is perpendicular to the plate surface of the side plate, and the lap edge and the side plate are not easy to twist and shift in the rivet pulling process;

2. the staff is with the locating plate back-off in the curb plate to make the border card of curb plate and sideboard establish in the draw-in groove, then the staff carries out curb plate and lapping plate rivet through the handle hole and connects, in the operation process, the draw-in groove can play the limited action to the position of curb plate and main part grillage, thereby rivet the in-process, the difficult condition that takes place the dislocation of curb plate and main part grillage is so that the connection accuracy is higher.

Drawings

FIG. 1 is a schematic structural diagram of a main chassis housing according to embodiment 1 of the present application;

FIG. 2 is an exploded view of the main body panel frame and side panels in example 1 of the present application

FIG. 3 is a schematic sectional view of a housing of a host computer according to embodiment 1 of the present application;

FIG. 4 is a schematic structural view of a positioning tool in use according to embodiment 1 of the present application;

FIG. 5 is an exploded schematic view of a positioning tool and a main case shell according to embodiment 1 of the present application;

FIG. 6 is a schematic structural view of a positioning tool in use according to embodiment 2 of the present application;

FIG. 7 is an exploded view of a positioning tool and a main case shell in embodiment 2 of the present application;

fig. 8 is an enlarged schematic view of a portion a in fig. 7.

Description of reference numerals: 1. a main body plate frame; 101. expanding and riveting holes; 102. pulling and riveting the hole; 11. a main board; 12. a back plate; 13. a side plate; 131. an abutting portion; 132. lapping; 2. a side plate; 21. a lap plate; 3. a functional support; 31. a limiting side plate; 311. a notch; 4. a partition plate; 41. a support portion; 42. connecting the edge parts; 5. a guide rail; 51. a card slot; 6. positioning a plate; 61. a card slot; 62. an operation hole; 7. a clamping assembly; 71. a limiting plate; 711. a movable hole; 72. a clasp; 721. a connecting portion; 722. a buckling part; 73. pulling a rod; 731. a limiting block; 8. an air-blowing assembly; 81. a blast pipe; 82. a fixing plate; 821. a handle.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses mainframe box shell and positioning tool.

Example 1

Referring to fig. 1 and 2, the main chassis includes a main body panel frame 1 and side panels 2, and the main body panel frame 1 includes a main panel 11, a rear panel 12, and two side panels 13. Mainboard 11, back plate 12 and two 13 homogeneous body shaping of sideboard, back plate 12 and 13 orientation are folded with the same side and both all perpendicular to mainboard 11, sideboard 13 is formed with butt portion 131 towards one side border bending type of back plate 12, sideboard 13 of two sideboard 13 is buckled in opposite directions, and back plate 12 is close to the lateral part butt of sideboard 13 in butt portion 131, back plate 12 and butt portion 131 can use screw fixation or rivet mode fixed connection, at this moment, because back plate 12 and butt portion 131 are formed by buckling of an integrated into one piece's plate body, screw fixation or rivet mode are fixed in-process, the dislocation condition can not take place for both, thereby fixed back precision is higher relatively.

Referring to fig. 2 and 3, the edge of one side of the side plate 13 away from the main plate 11 is bent to form a lap 132, the laps 132 of the two side plates 13 are bent towards each other, and the laps 132 are perpendicular to the side plates 13. The overlap edge 132 and the side plate 2 are both provided with a plurality of rivet holes 102, the rivet holes 102 are distributed along the length direction of the overlap edge 132 at equal intervals, the rivet holes 102 of the overlap edge 132 and the rivet holes 102 of the side plate 2 are arranged along the same central axis, blind rivets are arranged in the rivet holes 102, and the overlap edge 132 and the side plate 2 are fixedly connected through the blind rivets. The edge of the lap 132 facing the abutting portion 131 is overlapped on the edge of the abutting portion 131 away from the main board 11, so that the abutting portion 131 can also support the lap 132 and reduce the deformation of the lap 132. The side plates 2, the main plate 11, the rear plate 12 and the two side plates 13 are arranged in a surrounding manner to form a box-shaped structure with an open side, and the area of the surface of the rear plate 12 is smaller than the area of the open side of the box-shaped opening.

The curb plate 2 is towards one side border bending type of back plate 12 and is formed overlap joint board 21, and overlap joint board 21 butt in butt portion 131 and overlap joint board 21 and butt portion 131 adopt rivet mode fixed connection equally, and one side border butt of overlap joint board 21 is in the back plate 12 towards one side border of curb plate 2, consequently, when overlap joint board 21 receives the atress of perpendicular to face, butt portion 131 can do the support to overlap joint board 21 for overlap joint board 21 is difficult for deforming. The side plate 13 is further provided with a plurality of heat dissipation holes for dissipating heat.

Referring to fig. 2 and 3, main part grillage 1 and curb plate 2 enclose the intracavity of establishing and are provided with function support 3 and baffle 4, function support 3 and baffle 4 all are provided with two, 3 correspondences of a function support set up in a sideboard 13 and two 3 parallel arrangement of function supports each other, function support 3 is the strip structure and its rivets mode fixed connection in sideboard 13 through rising, 3 both sides length borders of function support are turned over towards the opposite side curb plate and are formed with restriction sideboard 31, make the cross-section profile of 3 perpendicular to self length direction of function support be the U font.

Baffle 4 sets up in parallel with mainboard 11, baffle 4 is rectangle platelike structure and 4 both sides length border of baffle are fixed connection respectively in two sideboard 13, baffle 4 can do the support in order to reduce the sunken condition of sideboard 13 middle part pressurized to two sideboard 13, baffle 4 is towards one side border bending type who leans on back plate 12 and is formed with supporting part 41, supporting part 41 and back plate 12 fixed connection, thereby butt portion 131 and supporting part 41 can support back plate 12, both synergism make back plate 12 difficult emergence warp the condition of buckling, one side border butt in functional bracket 3 of back plate 12 is kept away from to baffle 4, consequently, all mutual support linkages of each part structure of host computer case shell, it is whole to disperse local atress, improve the structural strength of host computer case shell, baffle 4 still can be used for placing integrated circuit board.

Baffle 4 has a plurality of connection limit portions 42 towards the both sides border integrated into one piece of sideboard 13, connection limit portion 42 is sheet structure and a plurality of connection limit portions 42 are towards same side direction buckling, a side butt in sideboard 13 of connection limit portion 42, connection limit portion 42 has seted up the through-hole, the position that sideboard 13 corresponds connection limit portion 42 has seted up the riveting hole 101 that rises, the riveting hole 101 that rises is toper pore structure and its tip towards connection limit portion 42, the through-hole of connection limit portion 42 is provided with a rivet nut with the riveting hole 101 that rises, and connection limit portion 42 and sideboard 13 both are connected through the riveting mode that rises.

In order to make the integrated circuit board more convenient to be fixed in the main machine case shell. The side plate 13 is provided with guide rails 5 for clamping the integrated circuit board, the guide rails 5 are provided with two groups, each group comprises two guide rails 5, one group of guide rails 5 is correspondingly and fixedly connected with the side plate 13, the guide rails 5 are arranged in an extending way along the length direction of the partition plate 4, one side of the guide rails 5 is provided with guide grooves 51 with two through ends, the openings of the guide grooves 51 of the two groups of guide rails 5 are oppositely arranged, the guide rails 5 are arranged in parallel with the partition plate 4, one end of the guide rail 5 far away from the back plate 12 is abutted against the functional bracket 3, the functional bracket 3 can limit the guide rails 5, one side of the limiting side plate 31 corresponding to the end parts of the guide grooves 51 is provided with a notch 311, the integrated circuit board can directly penetrate through the notch 311 and be clamped in the guide grooves 51, can accomplish integrated circuit board's installation work, it is more convenient relatively to install, and guide rail 5 and sideboard 13 have equally been seted up corresponding riveting hole 101 that rises to by the riveting mode fixed connection that rises.

The implementation principle of a host computer case shell of the embodiment of the application is as follows: main part grillage 1 is the plate body that a prefabrication formed and its can buckle and form mainboard 11, back plate 12 and two sideboard 13 to this can form four faces of main case shell, again by curb plate 2 and two sideboard 13 fixed connection, the used plate body of concatenation of main part grillage 1 only has two, makes holistic structural strength higher, and need not to use braced frame to do the support, can reach higher intensity. In addition, the processing of the main body plate frame 1 and the side plate 2 belongs to the same processing mode, and the precision is relatively high.

The embodiment of the application further discloses a positioning tool.

Referring to fig. 4 and 5, the positioning tool includes a positioning plate 6, the positioning plate 6 has a rectangular plate-shaped structure, and the positioning plate 6 may also have a circular or other polygonal plate-shaped structure. Draw-in groove 61 and operation hole 62 have been seted up to locating plate 6, and the notch of draw-in groove 61 is the rectangle, and draw-in groove 61 is used for the card to establish side plate 2 and sideboard 13 and keeps away from a side border of mainboard, and operation hole 62 sets up in the tank bottom wall of draw-in groove 61 and operation hole 62 and runs through the thickness direction of locating plate 6, and operation hole 62 is provided with a plurality of and a plurality of operation hole 62 and the rivet hole 102 of curb plate 2 and corresponds the setting. Location frock not only can play the positioning action and still can play the border size of inspection curb plate 2 and sideboard 13 and whether appear the error or exceed the error range, in can not block into draw-in groove 61 promptly if surpass error range curb plate 2 and sideboard 13, if main part grillage 1 is qualified with the size of curb plate 2, rivet the in-process at the drawing, draw-in groove 61 can block curb plate 2 and sideboard 13's border, it is spacing to main part grillage 1 and curb plate 2, prevent that curb plate 2 and main part grillage 1 from riveting the in-process at the drawing, because the dislocation appears in the extrusion force, consequently the location frock has two effects of detection and spacing simultaneously.

The application mode of a location frock and the processing technology of mainframe box shell are:

1. the method comprises the following steps that a worker sets a processed and bent main body plate frame 1 on a pneumatic riveting machine, adjusts the pressure of expansion riveting to be within the range of 110-150kg, sets a guide rail 5 at a fixed position of a side plate 13, sets expansion riveting nuts in expansion riveting holes 101 formed in the side plate 13 and the guide rail 5 correspondingly, performs expansion riveting operation through the pneumatic riveting machine, and fixedly connects the guide rail 5 with the side plate 13; then, sequentially arranging the partition plate 4 and the functional bracket 3 in the same expansion riveting mode;

2. align main part grillage 1 and curb plate 2 and place in the desktop, 2 one sides of curb plate set up, lock locating plate 6 on curb plate 2 and main part grillage 1 again, draw-in groove 61 establishes the border and the 2 card of curb plate 13, then, the staff uses the hand riveter to rivet the blind rivet who sets up in hand riveter hole 102 from operation hole 62, can accomplish the equipment work of mainframe box casing.

Example 2

The present embodiment is different from embodiment 1 in that,

referring to fig. 6 and 7, the positioning plate 6 is further provided with a clamping assembly 7, the clamping assembly 7 includes two limiting plates 71 and an elastic clasp 72, the two limiting plates 71 are provided with two limiting plates 71 and integrally formed with the positioning plate 6, the two limiting plates 71 are respectively provided at two side edges of the positioning plate 6, and the cross-sectional profiles of the limiting plates 71 and the positioning plate 6 in the width direction are U-shaped.

Referring to fig. 7 and 8, the hook 72 is made of polymer resin to reduce the scratching of the edge plate 13 by the hook 72, the hook 72 is in a strip structure and includes a connecting portion 721 and a fastening portion 722, the connecting portion 721 and the fastening portion 722 are integrally formed, the connecting portion 721 is fixedly connected to one side surface of the limiting plate 71, the fastening portion 722 extends toward the other side limiting plate 71, an end edge of the fastening portion 722 faces a bottom wall of the slot 61, and the fastening portion 722 is in an arc-shaped sheet shape and an inner arc surface thereof faces the limiting plate 71. The limiting plate 71 is provided with a movable hole 711 at one side facing the buckling part 722, the movable hole 711 penetrates through the limiting plate 71, the clamping assembly further comprises a pulling rod 73, the pulling rod 73 penetrates through the movable hole 711, and one end of the pulling rod 73 is fixedly connected to the buckling part 722.

When using, the staff with locating plate 6 lock joint in curb plate 2 back, elastic buckling part 722 can block and locate the riveting hole 101 that rises that is located the top to rivet the in-process, locating plate 6 can be relatively inseparabler laminating in curb plate 2 or sideboard 13, take place crooked condition in order to reduce the riveting process. After the rivet pulling is completed, the worker can operate the pulling rod 73 to disengage the fastening portion 722 from the rivet expanding hole 101, so that the positioning plate 6 can be removed.

Referring to fig. 6 and 7, the side plates 2 are prevented from being scratched in order to facilitate cleaning of debris in the clamping grooves 61 by workers. The limiting plate 71 is provided with an air blowing assembly 8, the air blowing assembly 8 is arranged on one side, back to the buckling portion 722, of the limiting plate 71, the air blowing assembly 8 comprises a blowing pipe 81 and a fixing plate 82, the blowing pipe 81 is made of a corrugated pipe, the opening edge of one end of the blowing pipe 81 is bonded to the fixing plate 82, and the opening edge of the other end of the blowing pipe 81 is bonded to one side plate surface of the limiting plate 71. The aperture of the movable hole 711 is larger than the diameter of the pulling rod 73, the movable hole 711 is communicated with the inner cavity of the blast pipe 81, one end of the pulling rod 73, which is far away from the buckling part 722, penetrates through the fixed plate 82, and the pulling rod 73 is connected to the fixed plate 82 in a sliding manner. When the worker needs to clean the debris in the clamping groove 61, the worker only needs to press the fixing plate 82, the fixing plate 82 can drive the air inside the blowing pipe 81 to be blown out from the movable hole 711, the inner wall of the buckling part 722 can guide the air, and the blown air is blown towards the bottom wall of the clamping groove 61, so that the cleaning work is completed.

In addition, in order to obviously improve the clamping effect of the clamping assembly 7, the number of the clamping assembly 7 corresponds to the number of the expansion riveting holes 101 of the side plate 13 closest to the side plate 2, the pulling rods 73 are all surrounded by the blast pipe 81, one end of each pulling rod 73 far away from the buckling part 722 is fixedly connected with a limiting block 731, the limiting block 731 is abutted to one side, back to the limiting plate 71, of the fixing plate 82, and a handle 821 is arranged on one side, back to the limiting plate 71, of the fixing plate 82, so that a worker can pull the fixing plate 82.

The application embodiment 2 of the positioning tool adopts the following use mode: after the worker clamps the edge of the side plate 13 and the side plate 2 in the clamping groove 61, the plurality of buckling parts 722 can just abut against the concave surface of the expanding riveting hole 101 to play a limiting role, and then the worker can complete the rivet pulling work through the operation hole 62; when the positioning tool needs to be taken down, the worker pulls the handle 821, and in the process that the fixing plate 82 is far away from the limiting plate 71, the fixing plate 82 abuts against the limiting block 731, so that the limiting block 731 pulls the buckling part 722 to contract, and the positioning tool can be taken down; and the worker pulls the handle 821 to make the fixing plate 82 press the blast pipe 81, the air flow of the blast pipe 81 can be blown out from the movable hole 711 and the groove wall of the clamping groove 61 can be purged, and the fragments adhered to the groove wall of the clamping groove 61 can be reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.