An assembly tool for elastic limit pieces

Abstract

The present application relates to an assembly tool for an elastic limiting member, belonging to the field of high-precision assembly technology. It includes a base, a pressing table for placing an elastic plate, and a positioning plate for providing elastic support force; the pressing table is fixed on the base, and a positioning groove for inserting a limiting block is provided on the upper surface of the pressing table; the positioning plate is an arc plate, the center line of the arc plate is located in the positioning groove, an arc-shaped sliding groove is provided on the base corresponding to the positioning plate, and an elastic support member is provided between the positioning plate and the bottom of the sliding groove; a clamping groove for clamping the hook structure of the elastic plate is provided at the upper end of the positioning plate, and the plate bodies on both sides of the clamping groove are abutting portions for abutting against the abutting protrusions on the elastic plate. The present application has the effects of ensuring the assembly accuracy of the elastic limiting member and improving the assembly efficiency.

Description

Technical Field

[0001] The present application relates to the field of assembly tooling, and more particularly to an assembly tooling for elastic limit members. Background Art

[0002] In existing office chairs, the functionality is becoming increasingly rich. The backrest can rotate and be laid flat, and the seat can be lifted, which can meet the different needs of users. For an office chair with a rotatable and lay-flat backrest, a load adjustment base is installed at the bottom of the office chair for connecting the seat cushion, the backrest, and a piston shaft with a lifting function. A rotating shaft for connecting the backrest is rotatably installed on the adjustment base, enabling the backrest to rotate; a torsion spring is installed between the rotating shaft and the frame of the adjustment base, and the torsion spring provides the restoring force for the backrest to return to its original position. For example, the patent document with the publication number CN202160996U discloses a multifunctional chassis with an improved structure, which is a structure of an office chair base, and its rotating shaft 21 is used to connect the backrest (refer to the specification

[0032] ), and the spring 22 provides an elastic restoring force.

[0003] In practical applications, a handle mechanism is also provided to control a rotation stop structure to limit the rotation of the rotating shaft, so as to flexibly control the tilting angle of the backrest. Refer to Figure 1 , which is a schematic diagram of a rotating shaft rotation stop structure, including a base frame 01, a rotating shaft 02, a torsion spring 021, and an elastic limit member. A rotating shaft hole 011 for installing the rotating shaft 02, a limiting hole 022 communicating with the rotating shaft hole 011, and a slot 023 provided on the outside of the base frame 01 are provided on the base frame 01.

[0004] Refer to Figure 1 and Figure 2 , the elastic limit member includes an elastic plate 03 and a limiting block 04. One end of the elastic plate 03 close to the slot 023 is bent into a hook 031 structure and hung in the slot 023. The other end of the elastic plate 03 is fixed with the limiting block 04 by screws, and the limiting block 04 is inserted into the limiting hole 022; a handle mechanism is provided to control the lifting of the elastic plate 03. The elastic plate 03 is lifted by the handle mechanism, so that the limiting block 04 is disengaged from the limiting hole 022, enabling the rotating shaft 02 to rotate freely. The elastic plate 03 is released by the handle control mechanism, so that the limiting block 04 enters the limiting hole 022 to limit the rotation of the rotating shaft 02.

[0005] An abutting protrusion 032 for abutting against the end of the slot 023 is provided on the hook 031 structure of the elastic plate. After the abutting protrusion 032 abuts against the slot 023, the hook end is fixed. The distance between the abutting protrusion 032 and the limiting block 04 determines whether the limiting block 04 can be smoothly inserted into the limiting hole 022.

[0006] If the distance between the abutting protrusion 032 and the limiting block 04 is too large, the elastic plate 03 will arch; if the distance between the abutting protrusion 032 and the limiting block 04 is too small, the elastic plate 03 will be in a stretched state, and the hook 031 structure on the elastic plate 03 will have obvious tensile deformation; both of these situations will affect the normal operation of the elastic plate 03 and will also affect the service life of the elastic plate 03, not meeting the processing requirements. This elastic limiting member has very high requirements for the distance accuracy between the limiting block 04 and the abutting protrusion 032. Since the hook 031 structure is obtained by bending the plate body, there are differences in the bending angles and bending positions of the hook 031 structures of each elastic plate 03 in actual processing. Therefore, the limiting block 04 is set in a form of post-installation, and the mounting holes on the elastic plate 03 are set as waist-shaped holes 033, so as to ensure the same distance between the limiting block 04 and the abutting protrusion 032 through later assembly and meet the assembly requirements.

[0007] In view of the above related technologies, it is necessary to design a tooling device for assembling elastic parts to improve production efficiency and ensure assembly accuracy. Summary of the Invention

[0008] In order to improve the assembly accuracy and production efficiency of the elastic limiting member, the present application provides an elastic limiting member assembly tooling, which can assist in positioning the relative positions of the elastic plate and the limiting block, and automatically eliminate the errors caused by the structural differences of the elastic plate, ensuring the assembly accuracy of the elastic limiting member while effectively assisting in improving the assembly efficiency of the elastic limiting member.

[0009] An elastic limiting member assembly tooling adopts the following technical solutions.

[0010] An elastic limiting member assembly tooling includes a base, a pressing table for placing an elastic plate, and a positioning plate for providing elastic supporting force; the pressing table is fixed on the base, and a positioning groove for inserting the limiting block is provided on the upper surface of the pressing table; the positioning plate is an arc plate, the center line of the arc plate is located in the positioning groove, an arc-shaped sliding groove is provided on the base corresponding to the positioning plate, and an elastic supporting member is provided between the positioning plate and the bottom of the sliding groove; a clamping groove for clamping the hook structure of the elastic plate is provided at the upper end of the positioning plate, and the plate bodies on both sides of the clamping groove are abutting portions for abutting against the abutting protrusions on the elastic plate.

[0011] By adopting the above technical solution, first place the limiting block into the positioning groove, then place the elastic plate on the press-fitting table. The hook end of the elastic plate is placed on the positioning plate, and the abutting protrusion on the elastic plate abuts against the arc-shaped side wall of the abutting portion. Then, press the elastic plate tightly on the press-fitting table. At this time, the position of the elastic plate is fixed, and the elastic plate is pressed above the limiting block, which is convenient for the operation of screwing. The distance between the abutting protrusion and the limiting block is equal to the radius of the arc of the positioning plate. When the elastic plate is pressed, the positioning plate will move downward naturally, avoiding the bending of the elastic plate itself and affecting the position accuracy of the abutting protrusion. At the same time, since the positioning plate is an arc-shaped plate and rotates around the center of the circle to achieve up and down floating, it can ensure that the distance between the abutting protrusion and the limiting block will not shift with the movement of the positioning plate. The operation of this device is convenient. Pushing the elastic plate gently to make the abutting protrusion abut against the side wall of the abutting portion can complete the positioning, and then directly press and fix the elastic plate and screw it. Under the condition of ensuring the installation accuracy of the limiting block, the assembly efficiency of this elastic limiting part can be effectively improved.

[0012] Optionally, the side wall of the positioning groove close to the positioning plate is a positioning surface, and the center line of the positioning plate passes through the lower edge line of the positioning surface.

[0013] By adopting the above technical solution, taking the lower side edge of the limiting block close to the abutting protrusion as the positioning reference, the distance between the lower side edge of the limiting block close to the abutting protrusion and the abutting protrusion is equal to the radius of the positioning plate.

[0014] Optionally, it further includes a clamping assembly for pressing and limiting the limiting block. The clamping assembly includes a clamping block arranged in the positioning groove and a clamping driving member for driving the clamping block to move towards the positioning surface.

[0015] By adopting the above technical solution, the position between the abutting protrusion and the limiting block is ensured to be accurate. It is necessary to ensure the close contact between the limiting block and the positioning groove. However, if only the size of the positioning groove is set close to the size of the limiting block, the installation of the limiting block will be very inconvenient and it is easy to get stuck in mid-air. The clamping block and the clamping driving member are provided, which can not only ensure that the limiting block is close to the positioning surface and guarantee the positioning accuracy, but also, when not installed, facilitate the installation of the limiting block by the way of the clamping block retracting, and improve the assembly efficiency of the elastic part.

[0016] Optionally, a sliding hole is opened on the press-fitting table. The sliding hole is located on the side of the positioning groove away from the positioning plate. The sliding hole is opened from the end of the press-fitting table and communicates with the positioning groove. A guiding rod body is fixed on the side of the clamping block close to the sliding hole. The guiding rod body is inserted into the sliding hole and is in sliding fit with the sliding hole. An abutting block is fixed at the end of the guiding rod away from the clamping block. A reset elastic member is arranged between the limiting block and the end face of the press-fitting table. The clamping driving member is located on the side of the abutting block away from the press-fitting table and is used to push the guiding rod body.

[0017] By adopting the above technical solution, the clamping driving member pushes the guiding rod body, and then drives the clamping block to clamp and fix the limiting block; while the guiding rod body is moving, the abutting block compresses the reset elastic member, and after the thrust of the clamping driving member is removed, it drives the guiding rod body and the clamping block to reset, so as to facilitate the staff to take out the assembled elastic limiting member.

[0018] Optionally, the pressing table is divided into a positioning block and a structural block with the positioning surface as the boundary. The groove body of the positioning groove is arranged on the structural block, and the structural block is detachably fixed on the base through bolts.

[0019] By adopting the above technical solution, the positioning groove is divided into two parts. The positioning block part with the positioning surface is fixed separately, which is convenient for machining the positioning surface. Since the positioning depends on the abutting of the positioning surface, the position accuracy and flatness of the positioning surface have relatively high requirements. Directly machining the exposed plane of the positioning block as the positioning surface is helpful to reduce the machining difficulty compared with directly machining the plane inside the groove; the structural block part with more structures is fixed separately. When maintenance is required or the size of the groove body needs to be changed, there is no need to move the positioning surface, avoiding cumbersome re-installation later. It is convenient for the maintenance and machining of the tooling.

[0020] Optionally, it further includes a pressing component for fixing the elastic plate. The pressing component includes a pressing plate suspended above the pressing table and a lifting driving member for controlling the lifting of the pressing plate. The pressing plate is located between the positioning groove and the positioning plate.

[0021] By adopting the above technical solution, the elastic plate is mechanically fixed by the pressing component, eliminating the need for manual fixing, facilitating one person to complete the entire high-precision assembly process, helping to improve work efficiency and reducing inefficient manual labor consumption.

[0022] Optionally, on the upper surface of the pressing table, a limiting groove is opened corresponding to the assembly position of the elastic plate, and the depth of the limiting groove is less than the thickness of the elastic plate.

[0023] By adopting the above technical solution, the lateral position of the elastic plate is positioned in cooperation with the clamping groove, further improving the position accuracy of the assembly of the limiting block; the thickness of the limiting groove is less than the thickness of the elastic plate, which can ensure that the pressing plate can tightly press the elastic plate.

[0024] Optionally, the abutting part is an arc-shaped abutting block with a thickness less than the main board body of the positioning plate, and the center of the abutting part coincides with the center of the positioning plate.

[0025] By adopting the above technical solution, the positioning plate needs to slide circumferentially along the chute. The plate body should have a certain length and must possess a certain strength, and its thickness should not be too small. For the abutting portion in contact with the elastic plate, if the plate body is too thick, during the process of the elastic plate being pressed down and the positioning plate rotating and moving downward, the abutting portion will move relative to the plate body of the elastic plate, and it is easy for the too thick abutting portion to interfere with the elastic plate. The abutting portion only needs to be provided corresponding to the card slot, and its thickness does not need to be too thick. Therefore, the abutting portion is separately provided to reduce the abutting.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By using the elastic support and the positioning plate that makes an arc-shaped lifting movement to support the hook end of the elastic plate, and cooperating with the pressing table to support the main body of the elastic plate, it can effectively ensure the distance between the limiting block and the abutting protrusion, effectively eliminate the structural error caused by the structural differences of each elastic plate, and can complete positioning and fixing at a relatively fast speed, which helps to improve production efficiency;

[0028] 2. By analyzing the movement of the elastic limiting member, determining that the center position of the positioning plate is the lower edge line of the limiting block can further improve the assembly accuracy of the limiting block. After the elastic limiting member is assembled, it is more adaptable to the structure of the base frame, optimizes the working state of the elastic plate, optimizes the seat performance, and extends the service life of the parts. Description of the Drawings

[0029] Figure 1 is a working condition schematic diagram of an elastic limiting member related to the present application;

[0030] Figure 2 is a structural schematic diagram of an elastic limiting member related to the present application;

[0031] Figure 3 is an overall structural schematic diagram of Embodiment 1 of the present application;

[0032] Figure 4 is a structural schematic diagram of the position of the chute base;

[0033] Figure 5 is an overall structural schematic diagram of the chute base;

[0034] Figure 6 is a structural schematic diagram of the clamping assembly in Embodiment 2 of the present application;

[0035] Figure 7 is a structural schematic diagram of the pressing and fixing assembly in Embodiment 3 of the present application.

[0036] Reference numerals: 1, base; 11, sliding groove; 2, press-fitting table; 21, positioning block; 211, positioning surface; 22, structural block; 221, positioning groove; 222, sliding hole; 23, limiting groove; 3, positioning plate; 31, clamping groove; 32, abutting portion; 4, clamping assembly; 41, clamping block; 411, guiding rod body; 42, return spring; 43, abutting nut; 44, clamping driving member; 5, pressing and fixing assembly; 51, pressing plate; 52, rubber pad; 53, lifting driving member; 531, cylinder block; 532, shaft body; 7, sliding groove base; 71, seat body; 711, fixing bolt hole; 72, sealing plate; 8, workbench surface. Detailed implementation mode

[0037] The following will further elaborate on this application in conjunction with the attached Figures 3 - 5 drawings.

[0038] Embodiment 1:

[0039] Embodiment 1 of this application discloses an assembly tool for elastic limit pieces. Refer to Figure 3 , which includes an iron base 1. The upper surface of the base 1 is fixedly provided with a press-fitting table 2 through bolts. A positioning groove 221 for placing the limit block is opened on the press-fitting table 2. One side of the press-fitting table 2 is provided with a positioning plate 3 that provides elastic support force. The positioning plate 3 is installed on the base 1 and is used to support the hook end of the elastic plate. On the upper surface of the press-fitting table 2, a limiting groove 23 corresponding to the assembly position of the elastic plate is opened. The depth of the limiting groove 23 is less than the thickness of the elastic plate, which limits the position of the elastic plate and helps to improve the position accuracy between the elastic plate and the limit block, and this helps to improve the installation accuracy of the limit block.

[0040] Refer to Figure 3 , the press-fitting table 2 includes two parts: a positioning block 21 and a structural block 22. The positioning block 21 and the structural block 22 are two iron blocks. The positioning block 21 and the structural block 22 are both detachably fixed on the base 1 through bolts. One side plane of the positioning block 21 close to the structural block 22 is processed flat as the positioning surface 211. The main body of the positioning groove 221 is opened on the structural block 22, and the positioning surface 211 serves as the groove wall on the side of the positioning groove 221 close to the positioning block 21. Ensuring that the positioning surface 211 is processed flat helps to ensure that the distance between the limit block in the positioning groove 221 and the positioning plate 3 remains consistent, and this helps to improve the installation accuracy of the limit block.

[0041] Refer to Figure 3, the positioning plate 3 is an integral arc plate. An arc-shaped sliding groove 11 is provided on the base corresponding to the positioning plate 3, and the positioning plate 3 is inserted into the sliding groove 11 and slides along a circular track; the center line of the circular track of the sliding groove 11 falls within the positioning groove 221 on the pressing table 2. In this embodiment, the sliding groove 11 takes the intersection line of the positioning surface 211 and the bottom of the positioning groove 221 as the center line, that is, the lower edge line of the positioning surface 211 within the positioning groove 221; an elastic support member is installed at the bottom of the sliding groove 11, and the elastic support member is a spring. The positioning plate 3 presses on the elastic support member, and the spring provides an elastic support force for the positioning plate 3. The elastic force of the spring should be slightly greater than the combined acting force of the gravity of the positioning plate 3 and the elastic plate, which can not only support the elastic plate, but also the elastic plate will not be subject to too much resistance when the end of the elastic plate moves downward. A U-shaped card slot 31 structure is provided at the upper end of the positioning plate 3 for clamping the plate body of the hook structure section of the elastic plate; the plate bodies on both sides of the card slot 31 serve as the abutting portions 32 in contact with the elastic plate. At the lower end of the positioning plate 3, a slope is provided on the side away from the pressing table 2 to facilitate inserting the positioning plate 3 into the sliding groove 11.

[0042] Reference Figure 3 , the plate thickness of the abutting portion 32 is smaller than that of the main body plate of the positioning plate 3, and the abutting portion 32 and the positioning plate 3 are arc-shaped plates with the same center line.

[0043] Reference Figure 4 and Figure 5 , a preferred implementation manner of Embodiment 1. In order to facilitate the processing of the sliding groove 11 structure, the part of the base 1 where the sliding groove 11 is located is cut off and processed separately as the sliding groove base 7. The main body part of the base 1 and the sliding groove base 7 are fixed on a workbench surface 8 by bolts. The sliding groove base 7 includes a seat body 71 and a sealing plate 72. The sliding groove 11 is opened from the side wall of the seat body 71. After the sliding groove 11 is opened and the spring is installed, the sealing plate 72 is fixed on the seat body 71 with bolts, effectively reducing the processing difficulty; fixing bolt holes 711 are provided on the base 1 and the seat body 71, and the base 1 and the sliding groove base 7 can be fixed on the workbench surface 8 by bolts to realize the fixation of the relative positions.

[0044] The implementation process of Embodiment 1 of this application is as follows: First, the limiting block is placed in the positioning groove 221, and then the elastic plate is placed on the pressing table 2. The hook end of the elastic plate is placed on the positioning plate 3, and the abutting protrusion on the elastic plate abuts against the arc-shaped side wall of the abutting portion 32. One end of the elastic plate provided with a kidney-shaped hole is inserted into the limiting groove 23 on the pressing table 2, and the kidney-shaped hole on the elastic plate corresponds to the bolt hole at the upper end of the limiting block. A worker gently presses the elastic plate with one hand to make the plate body of the elastic plate flat on the pressing table 2, and slightly exerts force toward the limiting block side during the gentle pressing process to ensure that the abutting protrusion on the elastic plate tightly abuts against the abutting portion 32 on the positioning plate 3. The worker uses an electric screwdriver in the other hand to drive screws to fix the limiting block and the elastic plate, which is convenient to operate.

[0045] The implementation principle of Embodiment 1 of this application is as follows: Since the bending process of the elastic plate is difficult to precisely control the bending angle of the elastic plate, for different elastic plates, the arc angles on the plate body will be different, so the heights of the plate bodies at the hook ends will be different, which will cause the positions of the abutting protrusions to change, and the degree of attachment to the tabletop of the pressing table 2 will also be different. By setting the positioning plate 3 that provides elastic support force, when the elastic plate is pressed, the positioning plate 3 will naturally move downward accordingly, preventing the elastic plate from bending itself and affecting the position accuracy of the abutting protrusion; at the same time, since the positioning plate 3 is an arc-shaped plate and rotates around the center of the circle to achieve up and down floating, this can ensure that the distance between the abutting protrusion and the lower edge of the limiting block will not shift with the movement of the positioning plate 3. This device is easy to operate and can effectively improve the assembly efficiency of this elastic limiting part while ensuring the installation accuracy of the limiting block.

[0046] Embodiment 2:

[0047] Reference Figure 6 , the difference between this embodiment and Embodiment 1 is that: a clamping assembly 4 for clamping and fixing the limiting block is further provided on the base 1, and the clamping assembly 4 is located on the side of the structural block 22 away from the positioning block 21.

[0048] Reference Figure 6 , the clamping assembly 4 includes a clamping block 41 and a clamping driving member 44. The clamping block 41 is arranged in the positioning groove 221, and the clamping block 41 cooperates with the positioning surface 211 to clamp and fix the limiting block under the drive of the clamping driving member 44. A sliding hole 222 is opened at one end of the structural block 22 away from the positioning block 21, and the sliding hole 222 penetrates through the positioning block 21 to communicate with the positioning groove 221; the clamping block 41 is slidably arranged in the positioning groove 221, and one end of the clamping block 41 close to the sliding hole 222 extends out a guiding rod body 411, and the guiding rod body 411 is slidably matched with the sliding hole 222; a return spring 42 is sleeved on the guiding rod body 411 as a return elastic member, and a threaded section is arranged at one end of the guiding rod body 411 away from the clamping block 41, and a contact nut 43 is screwed on the threaded section of the guiding rod body 411 as a contact block, and the return spring 42 is abutted and arranged between the end face of the structural block 22 and the end face of the contact nut 43.

[0049] The clamping driving member 44 is a double-air-circuit cylinder fixed on the base 1 with bolts. Through the movement of the cylinder movable shaft, it abuts against the guiding rod or releases it to realize the clamping and releasing actions of the clamping block 41. The clamping driving member 44 is arranged on the side of the contact nut 43 away from the structural block 22.

[0050] The implementation principle of Embodiment 2 of this application is as follows: Before installing the limit block, the movable shaft of the double-air-circuit cylinder is in a retracted state, and the limit block can be easily placed into the positioning groove 221; after the limit block is placed into the positioning groove 221, start the double-air-circuit cylinder, and the movable shaft of the double-air-circuit cylinder extends out to tightly abut against the abutting nut 43, and the clamping block 41 slides to clamp the limit block in cooperation with the positioning surface 211, which can ensure that the limit block abuts tightly against the positioning surface 211, guarantee the installation accuracy of the limit block, and further ensure the position accuracy between the limit block and the abutting protrusion. By setting the clamping assembly 4, it is not only convenient to install and remove the limit block, but also can guarantee the installation accuracy of the limit block.

[0051] Embodiment 3:

[0052] Compared with Embodiment 1 or Embodiment 2, the difference in this embodiment is that a pressing and fixing assembly 5 for fixing the elastic plate is provided at the position of the positioning block 21.

[0053] Reference Figure 6 , the pressing and fixing assembly 5 includes a pressing plate 51 suspended above the positioning block 21, a lifting driving member 53 for driving the pressing plate 51 to lift and lower, and a rubber pad 52 provided on the lower surface of the pressing plate 51. The lifting driving member 53 is a pair of double-air-circuit cylinders arranged on both sides of the positioning block 21. The cylinder block 531 is fixed to the lower side of the base 1 by bolts, and the shaft body 532 of the cylinder penetrates through the base 1; both ends of the pressing plate 51 are mounted on the ends of the shaft bodies 532 of the two cylinders and are fixed by bolts; the pressing plate 51 is suspended above the positioning block 21, and the pressing plate 51 is located between the positioning groove 221 and the positioning block 21. When assembling the elastic plate and the limit block, the plate body of the elastic plate passes through between the pressing plate 51 and the positioning block 21, and the elastic plate is pressed and fixed by the downward pressing of the pressing plate 51; the rubber pad 52 can prevent the pressing plate 51 from damaging other structures on the elastic plate.

[0054] The implementation principle of Embodiment 3 is as follows: First, place the limit block into the positioning groove 221, then place the elastic plate on the pressing table 2. The hook end of the elastic plate is placed on the positioning plate 3, and the abutting protrusion on the elastic plate abuts against the arc-shaped side wall of the abutting portion 32; the worker gently pushes the end of the hook end of the elastic plate to ensure that the abutting protrusion abuts tightly against the abutting portion 32, and start the lifting driving member 53, and the pressing plate 51 presses the elastic plate tightly on the pressing table 2. At this time, the position of the elastic plate is fixed, and it does not require the worker's both hands, which is more convenient for the operation of driving screws, and can also prevent dimensional errors caused by the worker's incorrect operation.

[0055] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An assembly tool for elastic limit pieces, characterized in that: It includes a base (1), a press-fitting table (2) for placing an elastic plate, and a positioning plate (3) for providing elastic support force; the press-fitting table (2) is fixed on the base (1), and a positioning groove (221) for inserting a limiting block is provided on the upper surface of the press-fitting table (2); the positioning plate (3) is an arc plate, the center line of the arc plate is located in the positioning groove (221), an arc-shaped sliding groove (11) is provided on the base (1) corresponding to the positioning plate (3), and an elastic support member is provided between the positioning plate (3) and the bottom of the sliding groove (11); a clamping groove (31) for clamping the hook structure of the elastic plate is provided at the upper end of the positioning plate (3), and the plate bodies on both sides of the clamping groove (31) are abutting portions (32) for abutting against the abutting protrusions on the elastic plate.

2. The assembly tool for elastic limit pieces according to claim 1, characterized in that: The side wall of the positioning groove (221) close to the positioning plate (3) is a positioning surface (211), and the center line of the positioning plate (3) passes through the lower edge line of the positioning surface (211).

3. The assembly tool for elastic limit pieces according to claim 2, characterized in that: It further includes a clamping assembly (4) for pressing and limiting the block, and the clamping assembly (4) includes a clamping block (41) arranged in the positioning groove (221) and a clamping driving member (44) for driving the clamping block (41) to move towards the positioning surface (211).

4. The assembly tool for elastic limit pieces according to claim 3, characterized in that: A sliding hole (222) is provided on the press-fitting table (2), the sliding hole (222) is located on the side of the positioning groove (221) away from the positioning plate (3), the sliding hole (222) is opened from the end of the press-fitting table (2) and communicates with the positioning groove (221); a guiding rod body (411) is fixed on the side of the clamping block (41) close to the sliding hole (222), the guiding rod body (411) is inserted into the sliding hole (222) and is in sliding fit with the sliding hole (222), an abutting block is fixed at the end of the guiding rod away from the clamping block (41), and a reset elastic member is provided between the limiting block and the end face of the press-fitting table (2); the clamping driving member (44) is located on the side of the abutting block away from the press-fitting table (2) for pushing the guiding rod body (411).

5. The assembly tool for elastic limit pieces according to claim 1, characterized in that: The side wall of the positioning groove (221) close to the positioning plate (3) is a positioning surface (211), the press-fitting table (2) is divided into two parts, a positioning block (21) and a structural block (22), with the positioning surface (211) as the boundary, the groove body of the positioning groove (221) is opened on the structural block (22), and the structural block (22) is detachably fixed on the base (1) by bolts.

6. The assembly tool for elastic limit pieces according to claim 1, characterized in that: It further includes a pressing and fixing assembly (5) for fixing the elastic plate, and the pressing and fixing assembly (5) includes a pressing plate (51) suspended above the press-fitting table (2) and a lifting driving member (53) for controlling the lifting of the pressing plate (51), and the pressing plate (51) is located between the positioning groove (221) and the positioning plate (3).

7. The assembly tool for elastic limit pieces according to claim 1, characterized in that: On the upper surface of the press-fitting table (2), a limiting groove (23) is provided corresponding to the assembly position of the elastic plate, and the depth of the limiting groove (23) is less than the thickness of the elastic plate.

8. The assembly tool for elastic limit pieces according to claim 1, characterized in that: The abutting portion (32) is an arc-shaped abutting block with a thickness smaller than that of the main board body of the positioning plate (3), and the abutting portion (32) coincides with the center of the positioning plate (3).

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