Suspension spring tail end forming fixing clamp

Abstract

The utility model belongs to the technical field of spring hot rolling, and discloses a suspension spring tail end forming fixing clamp which comprises a base, two first sliding rails are installed on the base, a first transverse support is in sliding connection with the first sliding rail on the corresponding side through a first sliding block, one side of the first transverse support is connected with a second transverse support, and the other side of the first transverse support is connected with a second sliding block. A jacking air cylinder, a first clamping head and a second clamping head are installed on the second transverse support, two side frames are symmetrically installed on the side face of the base and connected with a cylinder barrel of the first transverse air cylinder, the end of a cylinder rod of the first transverse air cylinder is hinged to the bottom of the first transverse support, and two second transverse air cylinders are installed on the first transverse support. The end of a cylinder rod of the second transverse air cylinder is connected with the positioning box, in the tail end rolling process, the first chuck and the second chuck clamp a spring, the first positioning pressing block presses the spring needing to be rolled, rolling of the tail end of the spring is achieved through the rolling device, and the whole fixing clamp is rapid, convenient to use and high in production efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot coiling of springs, and particularly relates to a fixing fixture for forming the end of a suspension spring. Background Art

[0002] An automotive suspension spring is the most commonly used elastic element in an automotive suspension system. Due to the advantages of simple structure, good reliability, short manufacturing process flow, low manufacturing cost, and long service life, it has been widely used in the field of automotive shock absorption. At present, the production of suspension springs is first coiled on a coiling device to form the head end of the suspension spring. However, during the coiling process, the end of the suspension spring cannot be coiled. After the preliminary coiling is completed, the suspension spring needs to be placed in an end forming device for end coiling. However, during the end coiling process, the fixing and position adjustment of the spring are not flexible enough, the efficiency is low, and it is difficult to meet the needs of fully automatic production. Summary of the Utility Model

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a fixing fixture for forming the end of a suspension spring, which realizes the fixing and position adjustment of the suspension spring during the coiling process, quickly and conveniently.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows: a fixing fixture for forming the end of a suspension spring, comprising a base, on which two first slide rails are installed. A first transverse bracket is slidably connected to the corresponding first slide rail through a first slider, and the first transverse bracket can slide horizontally relative to the base. One side of the first transverse bracket is connected to a second transverse bracket, and the second transverse bracket is fixed to the cylinder barrel of a lifting cylinder. The cylinder rod of the lifting cylinder is connected to a conical block. A third transverse bracket is fixed to the first transverse bracket, and a first clamping head and a second clamping head are hinged on the third transverse bracket. The first clamping head and the second clamping head are symmetrically arranged. The lower part of the first clamping head is hinged to one end of a return link. The other end of the return link passes through the lower part of the second clamping head and is locked by a limit nut. A return spring is press-fitted between the limit nut and the second clamping head. The conical block is placed between the first clamping head and the second clamping head and below the return link. The opening and closing of the first clamping head and the second clamping head are controlled by the rising and falling of the conical block.

[0005] Two side frames are symmetrically installed on the side of the base. The side frames are connected to the cylinder barrel of the first transverse cylinder. The piston rod of the first transverse cylinder extends horizontally. The end of the piston rod of the first transverse cylinder is hinged to the bottom of the first transverse bracket. The first transverse bracket is slidably connected to the two second slide rails of the first transverse bracket. The piston rod of the first transverse cylinder expands and contracts to achieve the horizontal movement of the first transverse bracket. The length direction of the second slide rail is consistent with the extending direction of the piston rod of the first transverse cylinder. Two second transverse cylinders are installed on the first transverse bracket. The second transverse cylinders are arranged in parallel. The end of the piston rod of the second transverse cylinder is connected to the positioning box body. The piston rod of the second transverse cylinder expands and contracts to achieve the horizontal movement of the positioning box body.

[0006] The positioning box body is slidably connected to the two second slide rails of the first transverse bracket. A first positioning cylinder is installed in the positioning box body. The piston rod of the first positioning cylinder is hinged to the bottom end of the first positioning press head. The middle part of the first positioning press head is hinged to the positioning box body. The top end of the first positioning press head is free. The piston rod of the first positioning cylinder expands and contracts to achieve the clamping or loosening of the first positioning press head. A second positioning cylinder is installed in the positioning box body. The piston rod of the second positioning cylinder is hinged to the bottom end of the second positioning press head. The middle part of the second positioning press head is hinged to the positioning box body. The top end of the second positioning press head is free. The piston rod of the second positioning cylinder expands and contracts to achieve the clamping or loosening of the second positioning press head. A third positioning cylinder is installed in the positioning box body. The piston rod of the third positioning cylinder is hinged to the bottom end of the third positioning press head. The middle part of the third positioning press head is hinged to the positioning box body. The top end of the third positioning press head is free. The piston rod of the third positioning press head expands and contracts to achieve the clamping or loosening of the third positioning press head.

[0007] A guiding device is provided at the top end of the side frame. A first guiding rod and a second guiding rod are installed on the guiding device. The first guiding roller is arranged in parallel with the second guiding rod. The spring to be coiled at the end is placed between the first guiding rod and the second guiding rod. The first chuck and the second chuck are both placed between the first guiding rod and the second guiding rod. The top ends of the first chuck and the second chuck extend above the first guiding rod and the second guiding rod to facilitate clamping the spring on the first guiding rod and the second guiding rod.

[0008] The utility model further includes a guiding air cylinder. The cylinder barrel of the guiding air cylinder is hinged to the side frame, the end of the piston rod of the guiding air cylinder is hinged to one end of the auxiliary frame, the other end of the auxiliary frame is connected to the first guiding frame, and both the first guiding frame and the second guiding frame are hinged to the side frame and are meshed through teeth; a first arc-shaped clamping groove is arranged at the top of the first guiding frame, and the first guiding rod is placed in the first arc-shaped clamping groove; a second arc-shaped clamping groove is arranged at the top of the second guiding frame, and the second guiding rod is placed in the second arc-shaped clamping groove; when the piston rod of the guiding air cylinder extends out, the first guiding frame and the second guiding frame rotate synchronously, and the distance between the first guiding rod and the second guiding rod is reduced so as to roll the end of a spring with a smaller size; when the piston rod of the guiding air cylinder retracts, the first guiding frame and the second guiding frame rotate synchronously, and the distance between the first guiding rod and the second guiding rod is increased so as to roll the end of a spring with a larger size.

[0009] A first roller shaft is arranged at the bottom of the first chuck, a second roller shaft is arranged at the bottom of the second chuck, the first roller shaft abuts against one side of the conical block, the first roller shaft is in rolling connection with the conical block, the second roller shaft abuts against the other side of the conical block, the second roller shaft is in rolling connection with the conical block, and the first roller shaft, the second roller shaft and the conical block are in rolling friction, with small resistance.

[0010] A first arc-shaped opening is arranged at the top of the first chuck, a second arc-shaped opening is arranged at the top of the second chuck, and the first arc-shaped opening and the second arc-shaped opening are buckled to clamp the spring.

[0011] Compared with the prior art, the specific beneficial effects of the utility model are as follows: by arranging the first chuck and the second chuck, the spring is fixed during the end rolling process to prevent the spring from rotating randomly; by arranging the first positioning press head, the second positioning press head and the third positioning press head, the widths of the first positioning press head, the second positioning press head and the third positioning press head are different to meet the rolling requirements of springs with different calibers; by arranging the first guiding rod and the second guiding rod, the distance between the first guiding rod and the second guiding rod can be adjusted according to the rolling requirements of springs with different calibers; the whole fixing fixture is fast and convenient, has high production efficiency, and is convenient for processing requirements of springs with multiple sizes. Description of the Drawings

[0012] Figure 1 is a perspective view of the utility model.

[0013] Figure 2 is a front view of the utility model.

[0014] Figure 3 is a side view of the utility model.

[0015] Figure 4 is a schematic diagram of the internal connection relationship of the positioning box body.

[0016] Figure 5Schematic diagram of the connection relationship of the guiding device.

[0017] Figure 6 is Figure 1 Stereogram of the connection relationship between the jacking cylinder and the first chuck and the second chuck in

[0018] Figure 7 is Figure 1 Front view of the connection relationship between the jacking cylinder and the first chuck and the second chuck in

[0019] In the figure, 1 is the base, 2 is the first slide rail, 3 is the first slider, 4 is the first transverse bracket, 5 is the second transverse bracket, 6 is the jacking cylinder, 7 is the tapered block, 8 is the third transverse bracket, 9 is the first chuck, 10 is the second chuck, 11 is the return link, 12 is the limit nut, 13 is the return spring, 14 is the side frame, 15 is the first transverse cylinder, 16 is the second slide rail, 17 is the second transverse cylinder, 18 is the positioning box body, 19 is the first positioning cylinder, 20 is the first positioning press head, 21 is the second positioning cylinder, 22 is the second positioning press head, 23 is the third positioning cylinder, 24 is the third positioning press head, 25 is the first guide rod, 26 is the second guide rod, 27 is the guiding cylinder, 28 is the auxiliary frame, 29 is the first guiding frame, 30 is the second guiding frame, 31 is the first roller shaft, 32 is the second roller shaft, 33 is the first arc-shaped opening, 34 is the second arc-shaped opening. Detailed implementation mode

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] Such as Figure 1-7As shown in the figure, a forming and fixing fixture for the end of a suspension spring includes a base 1. Two first slide rails 2 are installed on the base 1. The first transverse bracket 4 is slidably connected to the corresponding first slide rail 2 on one side through a first slider 3, and the first transverse bracket 4 can slide horizontally relative to the base 1. One side of the first transverse bracket 4 is connected to the second transverse bracket 5. The second transverse bracket 5 is fixed to the cylinder barrel of the lifting cylinder 6. The piston rod of the lifting cylinder 6 is connected to the conical block 7. The third transverse bracket 8 is fixed to the first transverse bracket 4. A first clamping head 9 and a second clamping head 10 are hinged on the third transverse bracket 8. The first clamping head 9 and the second clamping head 10 are symmetrically arranged. The lower part of the first clamping head 9 is hinged to one end of the return link 11. The other end of the return link 11 passes through the lower part of the second clamping head 10 and is locked by a limit nut 12. A return spring 13 is press-fitted between the limit nut 12 and the second clamping head 10. The conical block is placed between the first clamping head 9 and the second clamping head 10, and the conical block 7 is placed below the return link 11. The opening and closing of the first clamping head 9 and the second clamping head 10 are controlled by the rising and falling of the conical block 7.

[0022] Two side frames 14 are symmetrically installed on the side surface of the base 1. The side frames 14 are connected to the cylinder barrel of the first transverse cylinder 15. The piston rod of the first transverse cylinder 15 extends horizontally. The end of the piston rod of the first transverse cylinder 15 is hinged to the bottom of the first transverse bracket 4. The first transverse bracket 4 is slidably connected to two second slide rails 16 on the first transverse bracket 4. The first transverse bracket 4 is horizontally translated by the telescopic movement of the piston rod of the first transverse cylinder 15. The length direction of the second slide rail 16 is the same as the extending direction of the piston rod of the first transverse cylinder 15. Two second transverse cylinders 17 are installed on the first transverse bracket 4. The second transverse cylinders 17 are arranged in parallel. The end of the piston rod of the second transverse cylinder 17 is connected to the positioning box body 18. The second transverse cylinder 17 is horizontally translated by the telescopic movement of the piston rod of the second transverse cylinder 17.

[0023] The positioning box body 18 is slidably connected to two second slide rails 16 of the first transverse bracket 4. A first positioning cylinder 19 is installed in the positioning box body 18. The cylinder rod of the first positioning cylinder 19 is hinged to the bottom end of the first positioning press head 20. The middle part of the first positioning press head 20 is hinged to the positioning box body 18. The top end of the first positioning press head 20 is free. The telescopic movement of the cylinder rod of the first positioning cylinder 19 realizes the clamping or loosening of the first positioning press head 20. A second positioning cylinder 21 is installed in the positioning box body 18. The cylinder rod of the second positioning cylinder 21 is hinged to the bottom end of the second positioning press head 22. The middle part of the second positioning press head 22 is hinged to the positioning box body 18. The top end of the second positioning press head 22 is free. The telescopic movement of the cylinder rod of the second positioning cylinder 21 realizes the clamping or loosening of the second positioning press head 22. A third positioning cylinder 23 is installed in the positioning box body 18. The cylinder rod of the third positioning cylinder 23 is hinged to the bottom end of the third positioning press head 24. The middle part of the third positioning press head 24 is hinged to the positioning box body 18. The top end of the third positioning press head 24 is free. The telescopic movement of the cylinder rod of the third positioning press head 24 realizes the clamping or loosening of the third positioning press head 24. The second positioning press head 22 is placed between the first positioning press head 20 and the third positioning press head 24.

[0024] A guiding device is provided at the top end of the side frame 14. A first guiding rod 25 and a second guiding rod 26 are installed on the guiding device. The first guiding roller is arranged parallel to the second guiding rod 26. The spring to be coiled at the end is placed between the first guiding rod 25 and the second guiding rod 26. Both the first chuck 9 and the second chuck 10 are placed between the first guiding rod 25 and the second guiding rod 26. The top ends of the first chuck 9 and the second chuck 10 extend above the first guiding rod 25 and the second guiding rod 26 to facilitate clamping of the spring on the first guiding rod 25 and the second guiding rod 26.

[0025] The utility model further includes a guiding air cylinder 27. The cylinder barrel of the guiding air cylinder 27 is hinged to the side frame 14. The end of the piston rod of the guiding air cylinder 27 is hinged to one end of an auxiliary frame 28. The other end of the auxiliary frame 28 is connected to a first guiding frame 29. Both the first guiding frame 29 and a second guiding frame 30 are hinged to the side frame 14. An arc-shaped rack is arranged on one side of the first guiding frame 29. An arc-shaped rack is also arranged on the side of the second guiding frame 30 opposite to the first guiding frame 29. The arc-shaped rack on the first guiding frame 29 meshes with the arc-shaped rack on the second guiding frame 30. A first arc-shaped card slot is provided at the top of the first guiding frame 29. A first guiding rod 25 is placed in the first arc-shaped card slot, and the first guiding rod 25 is fixedly connected to the first guiding frame 29. A second arc-shaped card slot is provided at the top of the second guiding frame 30. A second guiding rod 26 is placed in the second arc-shaped card slot, and the second guiding rod 26 is fixedly connected to the second guiding frame 30. When the piston rod of the guiding air cylinder 27 extends outwards, the first guiding frame 29 and the second guiding frame 30 rotate synchronously, and the distance between the first guiding rod 25 and the second guiding rod 26 decreases, so as to roll the end of a spring with a smaller size. When the piston rod of the guiding air cylinder 27 retracts, the first guiding frame 29 and the second guiding frame 30 rotate synchronously, and the distance between the first guiding rod 25 and the second guiding rod 26 increases, so as to roll the end of a spring with a larger size.

[0026] A first roller shaft 31 is provided at the bottom of the first chuck 9. A second roller shaft 32 is provided at the bottom of the second chuck 10. The first roller shaft 31 abuts against one side of the tapered block. The first roller shaft 31 is in rolling connection with the tapered block 7. The second roller shaft 32 abuts against the other side of the tapered block 7. The second roller shaft 32 is in rolling connection with the tapered block 7. The first roller shaft 31, the second roller shaft 32 and the tapered block 7 are in rolling friction, and the resistance is small.

[0027] A first arc-shaped opening 33 is provided at the top of the first chuck 9. A second arc-shaped opening 34 is provided at the top of the second chuck 10. The first arc-shaped opening 33 and the second arc-shaped opening 34 are buckled to clamp the spring.

[0028] The working process of the utility model is as follows: The suspension spring is grabbed by a mechanical gripper and placed on the tops of the first guiding rod 25 and the second guiding rod 26. Under the action of the return spring 13, the distance between the bottoms of the first chuck 9 and the second chuck 10 decreases, and the distance between the tops of the first chuck 9 and the second chuck 10 increases. The spring is placed between the first chuck 9 and the second chuck 10. The coiling device for coiling the end of the spring compacts the end of the spring. A first positioning press head 20 suitable for the radial diameter of the spring is selected. The piston rod of the first positioning air cylinder 19 extends outwards. The first positioning press head 20 rotates around its hinge and inserts into the radial distance of the spring to further lock the spring. The piston rod of the first positioning air cylinder 19 moves upwards. The tapered block 7 pushes open the first chuck 9 and the second chuck 10. The distance between the tops of the first chuck 9 and the second chuck 10 decreases and clamps the spring. The coiling device rotates to complete the coiling of the end of the spring.

[0029] After the coiling is completed, the pressure head of the coiling device is released, the piston rod of the first positioning cylinder 19 retracts, the tapered block 7 descends, and under the action of the return spring 13, the distance between the tops of the first chuck 9 and the second chuck 10 increases and the spring is released; the piston rod of the first positioning cylinder 19 retracts, the first positioning pressure head 20 rotates around its hinge point and disengages from the spring, releasing the spring, and the spring is grasped by the mechanical gripper and disengaged from the fixed fixture, facilitating the next coiling.

[0030] During the entire coiling process, the first positioning pressure head 20, the second positioning pressure head 22, and the third positioning pressure head 24 are selected according to the caliber of the spring, and the lateral position of the positioning pressure head is determined by the telescopic movement of the piston rod of the first lateral cylinder 15 and the telescopic movement of the piston rod of the second lateral cylinder 17.

[0031] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the scope of the present invention.

Claims

1. A fixing fixture for forming the end of a suspension spring, characterized in that It includes a base (1). Two first slide rails (2) are installed on the base (1). A first transverse bracket (4) is slidably connected to the corresponding side of the first slide rail (2) through a first slider (3). One side of the first transverse bracket (4) is connected to a second transverse bracket (5). The second transverse bracket (5) is fixed to the cylinder barrel of a lifting cylinder (6). The cylinder rod of the lifting cylinder (6) is connected to a conical block (7). A third transverse bracket (8) is fixed to the first transverse bracket (4). A first chuck (9) and a second chuck (10) are hinged on the third transverse bracket (8). The first chuck (9) and the second chuck (10) are symmetrically arranged. The lower part of the first chuck (9) is hinged to one end of a return link (11). The other end of the return link (11) passes through the lower part of the second chuck (10) and is locked by a limit nut (12). A return spring (13) is press-fitted between the limit nut (12) and the second chuck (10). The conical block (7) is placed between the first chuck (9) and the second chuck (10). The conical block (7) is placed below the return link (11). Two side frames (14) are symmetrically installed on the side surface of the base (1). The side frames (14) are connected to the cylinder barrel of a first transverse cylinder (15). The cylinder rod of the first transverse cylinder (15) extends horizontally. The end of the cylinder rod of the first transverse cylinder (15) is hinged to the bottom of the first transverse bracket (4). The first transverse bracket (4) is slidably connected to two second slide rails (16) of the first transverse bracket (4). The length direction of the second slide rail (16) is the same as the extending direction of the cylinder rod of the first transverse cylinder (15). Two second transverse cylinders (17) are installed on the first transverse bracket (4). The second transverse cylinders (17) are arranged in parallel. The end of the cylinder rod of the second transverse cylinder (17) is connected to a positioning box body (18). The positioning box body (18) is slidably connected to two second slide rails (16) of the first transverse bracket (4). A first positioning cylinder (19) is installed in the positioning box body (18). The cylinder rod of the first positioning cylinder (19) is hinged to the bottom end of a first positioning press head (20). The middle part of the first positioning press head (20) is hinged to the positioning box body (18). The top end of the first positioning press head (20) is free. A second positioning cylinder (21) is installed in the positioning box body (18). The cylinder rod of the second positioning cylinder (21) is hinged to the bottom end of a second positioning press head (22). The middle part of the second positioning press head (22) is hinged to the positioning box body (18). The top end of the second positioning press head (22) is free. A third positioning cylinder (23) is installed in the positioning box body (18). The cylinder rod of the third positioning cylinder (23) is hinged to the bottom end of a third positioning press head (24). The middle part of the third positioning press head (24) is hinged to the positioning box body (18). The top end of the third positioning press head (24) is free. A guiding device is provided at the top of the side frame (14). A first guiding rod (25) and a second guiding rod (26) are installed on the guiding device. The first guiding rod (25) and the second guiding rod (26) are arranged in parallel. The first chuck (9) and the second chuck (10) are both placed between the first guiding rod (25) and the second guiding rod (26).

2. The forming and fixing jig for the end of a suspension spring according to claim 1, characterized in that, It further includes a guiding cylinder (27). The cylinder barrel of the guiding cylinder (27) is hinged to the side frame (14). The end of the cylinder rod of the guiding cylinder (27) is hinged to one end of an auxiliary frame (28). The other end of the auxiliary frame (28) is connected to a first guiding frame (29). Both the first guiding frame (29) and the second guiding frame (30) are hinged to the side frame (14). The first guiding frame (29) and the second guiding frame (30) are meshed through teeth; A first arc-shaped card slot is provided at the top of the first guiding frame (29). The first guiding rod (25) is placed in the first arc-shaped card slot; A second arc-shaped card slot is provided at the top of the second guiding frame (30). The second guiding rod (26) is placed in the second arc-shaped card slot.

3. A fixed jig for forming the end of a suspension spring according to claim 2, characterized in that, A first roller shaft (31) is provided at the bottom of the first chuck (9). A second roller shaft (32) is provided at the bottom of the second chuck (10). The first roller shaft (31) abuts against one side of the conical block, and the second roller shaft (32) abuts against the other side of the conical block; A first arc-shaped opening (33) is provided at the top of the first chuck (9). A second arc-shaped opening (34) is provided at the top of the second chuck (10).

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