Auxiliary clamping mechanism for spot welding

Abstract

The utility model discloses a spot welding auxiliary clamping mechanism which comprises a lower die plate, a first clamping seat, a second clamping seat, a lower pressing arm and a linkage seat, a groove is formed in the lower die plate, and a positioning block is arranged in the groove in the width direction of the groove; the first clamping base and the second clamping base are arranged in the grooves in the two sides of the positioning block respectively, a first reset spring is arranged between the first clamping base and the positioning block, the upper portion of the first reset spring extends out of the grooves to form a first clamping part, and a second reset spring is arranged between the second clamping base and the positioning block. The upper part of the first clamping part extends out of the groove to form a second clamping part matched with the first clamping part; the linkage base is arranged in a groove in the left side of the first clamping base, the lower pressing arm is located above the lower die plate, and the linkage base is connected with the second clamping base through a linkage strip. The spot welding auxiliary clamping mechanism is arranged on an upper and lower die mechanism and used for clamping a terminal box-shaped body, and spot welding can be conveniently carried out on the top of the terminal box-shaped body.

Description

Technical Field

[0001] The utility model belongs to the technical field of terminal production, and in particular relates to a spot welding auxiliary clamping mechanism. Background Art

[0002] The forms and structures of automotive connectors are ever-changing. They are mainly composed of four basic structural components: contacts, housings (depending on the type), insulators, and accessories. Contacts, also known as terminals, are the core parts of connectors to achieve electrical connection functions. They are generally composed of male terminals and female terminals to form a contact pair, and the electrical connection is completed by plugging the female and male terminals together.

[0003] Among them, the socket of the female terminal is the key part of the contact pair. It relies on the elastic structure to deform elastically when plugged into the pin to generate elastic force to form a close contact with the male terminal to complete the connection. There are many types of socket structures, including cylindrical type (slit groove, shrinkage), tuning fork type, cantilever beam type (longitudinal slot), folding type (longitudinal slot, 9-shaped), box type (square socket) and hyperbolic wire spring socket. Among them, the box-shaped (square socket) terminal needs to be welded after stamping to ensure that it will not deform during long-term use. Summary of the invention

[0004] The utility model provides a spot welding auxiliary clamping mechanism, which is used for clamping a box-shaped body of a terminal to facilitate spot welding thereof.

[0005] The technical solution adopted by the utility model is:

[0006] A spot welding auxiliary clamping mechanism comprises a lower template, a first clamping seat, a second clamping seat, a lower pressure arm, and a linkage seat, wherein a groove is opened on the lower template, a positioning block is arranged in the groove along its width direction, and the top of the positioning block is flush with the top of the lower template; the first clamping seat and the second clamping seat are respectively arranged in the grooves on both sides of the positioning block, a first return spring is arranged between the first clamping seat and the positioning block, the upper part of the first clamping seat extends out of the groove to form a first clamping part, the second clamping seat and the positioning block are provided with a second return spring, and the upper part of the second clamping seat extends out of the groove to form a second clamping part that cooperates with the first clamping part; the linkage seat is arranged in the groove on the left side of the first clamping seat, and is movably attached to the first clamping seat, the lower pressure arm is located above the lower template, corresponding to the attached surface of the linkage seat and the first clamping seat, and the front and rear sides of the linkage seat are respectively provided with linkage strips, and the linkage strips are movably passed through the front and rear side surfaces arranged on the second clamping seat from the first clamping seat and the positioning block.

[0007] Preferably, the bottom of the grooves on both sides of the positioning block are provided with sliding grooves along their length direction, and the bottoms of the first clamping seat, the second clamping seat and the linkage seat are all provided with sliding strips matching the sliding grooves.

[0008] Preferably, a blind hole is provided on one side of the first clamping seat and the second clamping seat close to the positioning block, one end of the first return spring is fixed in the blind hole of the first clamping seat, and the other end extends out of the blind hole and is fixed on the side wall of the positioning block, and one end of the second return spring is fixed in the blind hole of the second clamping seat, and the other end extends out of the blind hole and is fixed on the side wall of the positioning block.

[0009] Preferably, the opposite side surfaces of the first clamping portion and the second clamping portion located above the groove are vertical clamping surfaces, and the vertical clamping surfaces are both provided with a clearance groove.

[0010] Preferably, the vertical clamping surface is protruding relative to the lower part of the first clamping seat and the second clamping seat, and the vertical clamping surface is higher than the positioning block.

[0011] Preferably, the sides of the linkage seat and the first clamping seat that are in contact with each other are respectively provided with a makeshift bevel, and the two makeshift bevels are symmetrically arranged, and the pressing arm comprises a first pressing portion, a vertical portion and a second pressing portion that are sequentially connected from bottom to top, and the left and right sides of the first pressing portion and the second pressing portion respectively have a pressing bevel with the same angle as the makeshift bevel, and the maximum diameter of the two pressing bevels of the first pressing portion is equal to the minimum diameter of the two pressing bevels of the second pressing portion.

[0012] Preferably, it further comprises a clamping arm located above the lower template, wherein the lower end surface of the clamping arm is a plane, and the lower end surface of the clamping arm corresponds to the clamping gap between the first clamping part and the second clamping part.

[0013] Preferably, a first protective plate is provided on the front and rear sides of the top of the linkage seat, the first protective plate extends to the top of the first clamping seat and is close to but not adjacent to the first clamping portion; a second protective plate is provided on the front and rear sides of the top right end of the second clamping seat, the other end of the second protective plate is close to but not adjacent to the second clamping portion.

[0014] Compared with the prior art, the beneficial effect of the utility model is that the spot welding auxiliary clamping mechanism is arranged on the upper and lower mold mechanisms to achieve the clamping of the terminal box body, which facilitates the spot welding of the top of the terminal box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural sectional view of the utility model.

[0016] Figure 2 for Figure 1 Exploded view after removing the lower pressure arm and clamping arm.

[0017] Figure 3 for Figure 2 Right view and top view of the first clamping seat.

[0018] Figure 4 for Figure 1 Top view after removing the lower pressure arm and clamping arm.

[0019] Figure 5 for Figure 4 Top view after adding the first and second protective plates.

[0020] Figure 6 It is a clamping schematic diagram of the utility model.

[0021] In the figure: 1. lower template; 2. first clamping seat; 3. second clamping seat; 4. linkage seat; 5. pressing arm; 6. clamping arm; 7. groove; 8. positioning block; 9. first return spring; 10. second return spring; 11. linkage bar; 12. slide groove; 13. slide bar; 14. blind hole; 15. vertical clamping surface; 16. clearance groove; 17. clearance bevel; 18. pressing bevel; 19. first protective plate; 20. second protective plate; 21. first clamping part; 31. second clamping part; 51. first pressing part; 52. vertical part; 53. second pressing part. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described below in combination with specific implementation methods. The drawings are only used for exemplary descriptions, and only show schematic diagrams rather than physical drawings, and cannot be understood as limitations of this patent; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0023] like Figure 1-Figure 6As shown, the utility model provides a spot welding auxiliary clamping mechanism, which is arranged on the upper and lower mold mechanisms, and is used to clamp the terminal box body, so as to facilitate welding on the top outer side thereof. Specifically, it includes a lower template 1, a first clamping seat 2, a second clamping seat 3, a lower pressure arm 5, and a linkage seat 4. The lower template 1 is provided with a groove 7, and a positioning block 8 is arranged in the groove 7 along its width direction, and the top of the positioning block 8 is flush with the top of the lower template 1. The positioning block is a rectangular block, and its top surface is a rectangular plane, which is convenient for the placement of the terminal box body; the first clamping seat 2 and the second clamping seat 3 are respectively arranged in the groove 7 on both sides of the positioning block 8, and a first reset spring 9 is arranged between the first clamping seat 2 and the positioning block 8, and the upper part of the first clamping seat 2 extends out of the groove to form a first clamping portion 21, and a second reset spring 10 is arranged between the second clamping seat 3 and the positioning block 8, and the second The upper part of the clamping seat 3 extends out of the groove to form a second clamping part 31 that matches the first clamping part 21; the linkage seat 4 is arranged in the groove 7 on the left side of the first clamping seat 2, and is movably attached to the first clamping seat 2. The lower pressure arm 5 is located above the lower template 1. The lower pressure arm is arranged at a suitable position of the upper mold mechanism according to the situation, corresponding to the contact surface of the linkage seat 4 and the first clamping seat 2, and can move downward with the upper mold mechanism to push the linkage seat and the first clamping seat to both sides; the front and rear sides of the linkage seat 4 are respectively provided with linkage bars 11, and the linkage bars 11 are movably passed from the first clamping seat 2 and the positioning block 8 through the front and rear sides of the second clamping seat 3. The linkage seat moves to the left, which can drive the second clamping seat to move to the left. At the same time, there is a gap between the linkage bar and the front and rear side walls of the first clamping seat, and its movement does not affect the first clamping seat.

[0024] Further, if Figure 2 , Figure 3 and Figure 4 As shown, the front and rear sides of the first clamping seat are respectively recessed inward to form an L-shaped clearance area, which is convenient for the linkage bar to pass through. A gap is left between the linkage bar and the side wall of the clearance area, and the movement of the linkage bar will not drive the movement of the first clamping seat. The front and rear sides of the positioning block are provided with rectangular through grooves, and the rectangular through grooves do not extend to the top surface of the positioning block, which is convenient for the linkage bar to pass through and does not affect the movement of the terminal box body from the rear side to the positioning block.

[0025] Since the linkage seat and the second clamping seat are connected through the linkage bars on the front and rear sides thereof, a small amount of gap will be reserved after the linkage bars are arranged on the front and rear sides of the linkage seat and the second clamping portion. In order to ensure the accuracy of the overall movement, the bottom of the groove located on both sides of the positioning block 8 is provided with a slide groove 12 along its length direction, and the bottoms of the first clamping seat 2, the second clamping seat 3 and the linkage seat 4 are all provided with a slide bar 13 matching the slide groove 12.

[0026] In this embodiment, the first return spring and the second return spring are arranged such that a blind hole 14 is respectively provided on one side of the first clamping seat 2 and the second clamping seat 3 close to the positioning block, one end of the first return spring 9 is fixed in the blind hole 14 of the first clamping seat 2, and the other end extends out of the blind hole 14 and is fixed to the side wall of the positioning block 8, and one end of the second return spring 10 is fixed in the blind hole 14 of the second clamping seat 3, and the other end extends out of the blind hole 14 and is fixed to the side wall of the positioning block 8. The distances of the first return spring and the second return spring extending out of the blind hole are adjusted according to the moving distances of the first clamping seat and the second clamping seat.

[0027] like Figure 6 As shown, the terminal box body is rectangular in shape with raised portions on both sides. In order to adapt to the shape of the terminal box body, the opposite sides of the first clamping portion 21 and the second clamping portion 31 located above the groove 7 are vertical clamping surfaces 15, and the vertical clamping surfaces 15 are provided with clearance grooves 16.

[0028] Furthermore, the vertical clamping surface 15 is protruding relative to the lower part of the first clamping seat 2 and the second clamping seat 3, and the vertical clamping surface 15 is higher than the positioning block 8, and the lower end of the vertical clamping surface is close to but not close to the top surface of the positioning block. This design enables the first clamping seat and the second clamping seat to clamp the terminal box body without being close to the positioning block.

[0029] In addition, in order to ensure that the moving distances of the first clamping seat and the second clamping seat are the same. The linkage seat 4 and the first clamping seat 2 are respectively provided with a make-way bevel 17 on one side thereof, and the two make-way bevels are symmetrically arranged; the pressing arm 5 has a first pressing portion 51, a vertical portion 52 and a second pressing portion 53 connected in sequence from bottom to top, and the left and right sides of the first pressing portion 51 and the second pressing portion 53 respectively have a pressing bevel 18 with the same angle as the make-way bevel, and the maximum diameter of the two pressing bevels of the first pressing portion is equal to the minimum diameter of the two pressing bevels of the second pressing portion. Among them, the first pressing portion cooperates with the vertical portion to press down and push the linkage seat and the first clamping seat to move to both sides respectively, and the second pressing portion plays a role of making way.

[0030] Since the terminal also has a material strip portion connected to the box-shaped body, when the box-shaped body is pushed forward, one side of the box-shaped body may be lifted. Preferably, a clamping arm 6 is also included above the lower template 1, and the clamping arm is arranged at a suitable position of the upper mold mechanism according to the situation. The lower end surface of the clamping arm 6 is a plane, and the lower end surface of the clamping arm corresponds to the clamping gap between the first clamping part and the second clamping part. The clamping arm moves downward and can press down the middle of the top surface of the terminal box-shaped body to make the box-shaped body flat, which ensures that the plane of the terminal box-shaped body is placed horizontally without affecting the spot welding of the front and rear sides of the top surface.

[0031] In addition, for the sake of aesthetics, a first protective plate 19 is provided on the front and rear sides of the top of the linkage seat 4, and the first protective plate 19 extends to the top of the first clamping seat 2 and is close to but not close to the first clamping part; a second protective plate 20 is provided on the front and rear sides of the top right end of the second clamping seat 3, and the other end of the second protective plate 20 is close to but not close to the second clamping part 31.

[0032] The working process of the utility model is as follows: Figure 1 As shown, in the non-working state, the lower pressing arm and the clamping arm are fixed at the appropriate position of the upper mold mechanism and do not move. The first clamping seat is set away from the positioning block under the action of the first reset spring, and the second clamping seat is set away from the positioning block under the action of the second reset spring. Since a linkage bar is set between the linkage seat and the second clamping seat, under the action of the linkage bar, the linkage seat moves to the right and abuts against the first clamping seat. Figure 6 As shown, the upper mold mechanism moves, and the terminal located at the rear side of the groove is forced to move forward to the top of the positioning block, and the lower pressure arm and the clamping arm move downward. When the lower pressure arm moves downward and is inserted between the contact surfaces of the linkage seat and the first clamping seat, the first clamping seat is forced to squeeze the first return spring, so that its first clamping part moves to the right, and at the same time, the linkage seat is forced to move to the left, and then drives the second clamping seat to squeeze the second return spring to the left through the linkage bar, and moves to the left. Under the joint action of the first clamping part and the second clamping part, the clamping of the terminal box body placed on the positioning block is achieved. At the same time, the lower end face of the clamping arm moves to the middle of the top surface of the terminal box body, so that the terminal box body is placed flat, and the welding gun performs spot welding on the front and rear sides of the top surface of the box body; when the spot welding is completed, the upper mold mechanism moves to drive the lower pressure arm and the clamping arm to return to their original position, and the first clamping seat, the second clamping seat and the linkage are restored to a non-working state.

Claims

1. A spot welding auxiliary clamping mechanism, comprising a lower template, a first clamping seat, a second clamping seat, a lower pressure arm, and a linkage seat, wherein a groove is provided on the lower template, a positioning block is provided in the groove along its width direction, and the top of the positioning block is flush with the top of the lower template; characterized in that: The first clamping seat and the second clamping seat are respectively arranged in the grooves on both sides of the positioning block, a first return spring is arranged between the first clamping seat and the positioning block, the upper part of the first clamping seat extends out of the groove to form a first clamping part, and a second return spring is arranged between the second clamping seat and the positioning block, and the upper part of the second clamping seat extends out of the groove to form a second clamping part that cooperates with the first clamping part; the linkage seat is arranged in the groove on the left side of the first clamping seat, and is movably attached to the first clamping seat, the lower pressure arm is located above the lower template, corresponding to the attached surface of the linkage seat and the first clamping seat, and the front and rear sides of the linkage seat are respectively provided with linkage strips, and the linkage strips movably pass through the front and rear side surfaces of the second clamping seat from the first clamping seat and the positioning block.

2. The spot welding auxiliary clamping mechanism according to claim 1, characterized in that: The bottom of the grooves located on both sides of the positioning block are provided with sliding grooves along the length direction thereof, and the bottoms of the first clamping seat, the second clamping seat and the linkage seat are all provided with sliding strips matching the sliding grooves.

3. The spot welding auxiliary clamping mechanism according to claim 1, characterized in that: A blind hole is respectively provided on one side of the first clamping seat and the second clamping seat close to the positioning block. One end of the first return spring is fixed in the blind hole of the first clamping seat, and the other end extends out of the blind hole and is fixed on the side wall of the positioning block. One end of the second return spring is fixed in the blind hole of the second clamping seat, and the other end extends out of the blind hole and is fixed on the side wall of the positioning block.

4. The spot welding auxiliary clamping mechanism according to claim 1, characterized in that: The opposite side surfaces of the first clamping part and the second clamping part located above the groove are vertical clamping surfaces, and the vertical clamping surfaces are both provided with a clearance groove.

5. The spot welding auxiliary clamping mechanism according to claim 4, characterized in that: The vertical clamping surface is protruding relative to the lower parts of the first clamping seat and the second clamping seat, and the vertical clamping surface is higher than the positioning block.

6. The spot welding auxiliary clamping mechanism according to claim 1, characterized in that: The linkage seat and the first clamping seat are respectively provided with a makeshift bevel on one side in contact with each other, and the two makeshift bevels are symmetrically arranged; the pressing arm comprises a first pressing portion, a vertical portion and a second pressing portion which are sequentially connected from bottom to top, and the left and right sides of the first pressing portion and the second pressing portion respectively have a pressing bevel with the same angle as the makeshift bevel, and the maximum diameter of the two pressing bevels of the first pressing portion is equal to the minimum diameter of the two pressing bevels of the second pressing portion.

7. The spot welding auxiliary clamping mechanism according to claim 1, characterized in that: It also includes a clamping arm located above the lower template, wherein the lower end surface of the clamping arm is a plane, and the lower end surface of the clamping arm corresponds to the clamping gap between the first clamping part and the second clamping part.

8. The spot welding auxiliary clamping mechanism according to claim 1, characterized in that: A first protective plate is provided on the front and rear sides of the top of the linkage seat, the first protective plate extends to the top of the first clamping seat and is close to but not close to the first clamping part; a second protective plate is provided on the front and rear sides of the top right end of the second clamping seat, the other end of the second protective plate is close to but not close to the second clamping part.

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