Automatic welding positioning tool for shock absorber oil reservoir and bottom cover

Abstract

This invention relates to the field of vibration damper processing tooling technology, specifically an automatic welding and positioning tooling for a vibration damper oil reservoir and bottom cover, including a circumferential welding machine, an inner positioning mechanism, and a top positioning mechanism. The invention utilizes a static tensioning component and a dynamic tensioning component. A servo motor drives a drive disc via a splined shaft, causing the tensioning arc plate to expand outwards. The dynamic tensioning component's outward tensioning can radially correct the workpiece eccentricity caused by manual pre-assembly, internally supporting the inner wall of the oil reservoir throughout the welding process, resisting the radial extrusion force applied by the welding wheel, and preventing radial swaying of the workpiece. The static tensioning component is arranged in the overlapping weld area of ​​the oil reservoir and bottom cover; its outward tensioning reduces the assembly gap between the oil reservoir and bottom cover, forming synchronous internal and external positioning support with the outer welding wheel, reducing weld gaps and improving weld strength. Ball bearings are installed on the outer wall of the tensioning arc plate, achieving both internal wall support and positioning without hindering the workpiece from rotating with the base to complete the circumferential welding.

Description

Technical Field

[0001] This invention relates to the field of vibration damper processing tooling technology, specifically to an automatic welding and positioning tooling for vibration damper oil reservoir and bottom cover. Background Technology

[0002] The oil reservoir and bottom cover of the shock absorber need to be subjected to circumferential resistance welding. Currently, the industry generally uses a vertical circumferential welding machine to complete this welding process.

[0003] Existing welding fixtures generally use a fixed mandrel as an internal positioning component. During operation, the operator needs to pre-embed the bottom cover into the oil reservoir outside the fixture to complete the pre-assembly. Then, the pre-assembled workpiece is put onto the fixed mandrel as a whole, and the rough positioning is achieved by relying on the gap fit between the mandrel and the inner wall of the cylinder. After that, the top pressure head axially presses the workpiece, and the welding wheels on both sides radially feed and press the workpiece, driving the workpiece to rotate to complete the circumferential weld.

[0004] The inventors have discovered at least the following problems in the prior art: First, the workpiece is pre-assembled manually on the outside of the tooling, which is prone to eccentricity during the pre-assembly process; the fixed core rod and the inner wall of the cylinder are clearance fit, and when the welding wheel applies radial extrusion force to the workpiece, the workpiece is prone to radial sway, and the coaxiality of the workpiece is difficult to guarantee; the assembly gap at the joint between the oil reservoir and the bottom cover cannot be constrained, which directly affects the weld formation quality and the weld strength. Secondly, existing equipment relies solely on external cooling on the welding wheel side to cool the weld, while lacking cooling methods on the inside of the weld, making it difficult to dissipate welding heat quickly and resulting in significant thermal deformation of the workpiece during welding. Finally, after the workpiece is fitted into the fixture, the operator needs to continuously support the workpiece before the welding wheel is fed into position, which is labor-intensive. After welding, the workpiece expands due to heat and hugs the core rod, resulting in high resistance when removing the workpiece and inconvenient material handling.

[0005] Therefore, this solution provides an automatic welding and positioning fixture for the shock absorber oil reservoir and the bottom cover to solve the above problems. Summary of the Invention

[0006] In view of the problems in the prior art, such as the tendency of manual pre-assembly to cause eccentricity and the large thermal deformation of the workpiece due to only cooling the outer side of the weld, the present invention provides an automatic welding and positioning fixture for the oil reservoir and bottom cover of a vibration damper to solve the above problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An automatic welding and positioning fixture for a shock absorber oil reservoir and bottom cover includes a circumferential welding machine, an inner positioning mechanism and a top positioning mechanism. The processing end of the circumferential welding machine is provided with two symmetrical welding wheels. The inner positioning mechanism is located between the two welding wheels. A downward pressure cylinder is installed on one side of the circumferential welding machine. The top positioning mechanism is located above the inner positioning mechanism. The internal positioning mechanism includes a base and a ring of support columns above it, as well as a static tensioning component fixedly connected to the top of the support columns and a dynamic tensioning component inside the support columns. A limit component is provided above the dynamic tensioning component, and a slider is installed around the periphery of the dynamic tensioning component. The static tensioning component is completely identical to the dynamic tensioning component. The dynamic tensioning assembly includes a receiving block and a drive disk rotatably connected inside it, with a ring of limiting rods arranged above the drive disk; The top positioning mechanism includes a supporting frame, an inner slide, a linkage rod, a side sliding plate, two inner wedges, and two clamping plates. The linkage rod and the side sliding plate are slidably connected to the inner side of the supporting frame, and the supporting frame is fixedly connected to the telescopic end of the downward pressing cylinder. The circumferential welder has a pump body on its outer side and two external wedges installed on one side of the circumferential welder.

[0008] Preferably, the receiving block has a connecting groove on its periphery, the slider is installed inside the connecting groove, the receiving block has a disc groove inside, the upper end of the disc groove has annularly distributed slots, the limiting rod is slidably connected inside the slots, and the driving disc is located inside the disc groove.

[0009] Preferably, the two ends of the limiting rod are respectively fixedly connected to a limiting insert rod and a tensioning arc plate. The outer wall of the tensioning arc plate is embedded with evenly distributed balls. The drive plate has four annularly distributed limiting grooves and a spline groove in the middle. The limiting insert rod is slidably connected in the limiting groove.

[0010] Preferably, the base is rotatably connected to one side of the circumferential welder, a servo motor is installed inside the base, a spline shaft is installed at the output end of the servo motor, the spline shaft passes through the static tensioning component and the receiving block, and the spline shaft fits into the inside of the spline groove.

[0011] Preferably, the inner side of the receiving column is provided with an adjusting groove, the outer side of the bottom end of the receiving column is provided with a liquid inlet, the outer side of the top end of the receiving column is provided with a nozzle, the liquid inlet is connected to the nozzle, the liquid inlet is connected to the output end of the pump body through a hose, and the slider is located inside the adjusting groove.

[0012] Preferably, the limiting component includes a receiving ring and an inner ring rotatably connected thereto. The receiving ring is fixedly connected above the receiving block. A bevel gear ring is fixedly connected above the inner ring. A ring-shaped rubber pad is fixedly connected to the outer periphery of the inner ring. One side of the rubber pad is attached to the outer periphery of the receiving column. A bevel gear is rotatably connected to one side of the receiving ring. The bevel gear is meshed above the bevel gear ring.

[0013] Preferably, the inner slide is fixedly connected to the lower inner side of the supporting frame, two symmetrical inner sliders are slidably connected to one side of the inner slide, the inner wedge is located on the other side of the inner slide, a connecting plate is fixedly connected to the top of the linkage rod, a connecting rod is fixedly connected to the lower part of the other end of the connecting plate, the connecting rod is fixedly connected to the upper part of the side sliding plate, and a spring is provided around the linkage rod.

[0014] Preferably, two symmetrical inner wedges are slidably connected below the side sliding plate. A spring is provided on one side of the sliding connection of the inner wedges, and an abutment block is fixedly connected to one side of the inner wedges. The abutment block cooperates with the outer wedge, and the inner side of the inner wedge cooperates with the inner slider.

[0015] Preferably, one side of the inner slider is rotatably connected to a second connecting rod, the other end of the second connecting rod is rotatably connected to a first connecting rod, one end of the first connecting rod is rotatably connected to a clamping plate, and the other end of the first connecting rod is rotatably connected to a supporting frame.

[0016] Preferably, a bottom cover and an oil reservoir are pre-assembled between the two welding wheels, with the oil reservoir sleeved around the inner positioning mechanism and the bottom cover located below the linkage rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention employs a static tensioning component and a dynamic tensioning component. A servo motor drives a drive disc to rotate via a splined shaft, causing the tensioning arc plate to expand outward. The dynamic tensioning component's outward tensioning can radially correct the workpiece eccentricity caused by manual pre-assembly, providing internal support to the inner wall of the oil reservoir throughout the welding process, resisting the radial extrusion force applied by the welding wheel, and preventing radial swaying of the workpiece. The static tensioning component is arranged in the overlapping weld area of ​​the oil reservoir and the bottom cover. Its outward tensioning can reduce the assembly gap between the oil reservoir and the bottom cover, forming synchronous internal and external positioning support with the outer welding wheel, reducing weld gaps and improving weld strength. The outer wall of the tensioning arc plate is equipped with ball bearings, which achieves internal wall support and positioning without hindering the workpiece from rotating with the base to complete the circumferential weld.

[0018] The dynamic tensioning component of this invention is assembled in the adjustment groove of the receiving column by a slider, and its height can be adjusted along the receiving column. It can also be locked in position by a limiting component. Only the installation height of the dynamic tensioning component needs to be adjusted to adapt to oil reservoirs of different lengths. There is no need to completely disassemble and replace the main core rod component, making product changeover and debugging operations convenient.

[0019] This invention features a fluid channel inside the receiving column. Coolant output from the pump enters the receiving column through the inlet and is finally sprayed out from the nozzle to cool the inside of the weld. This works in conjunction with the original external cooling structure of the circumferential weld machine to achieve simultaneous cooling of the inside and outside of the weld, improving the cooling effect and reducing the thermal deformation of the workpiece during welding.

[0020] This invention features a top positioning mechanism. During the downward movement of the receiving frame driven by the downward-pressing cylinder, the outer wedge, inner wedge, and connecting rod drive the clamping plate to pre-clamp the outer periphery of the oil reservoir. This allows the workpiece to be fixed before the welding wheel clamps it, and the operator can release the support for the workpiece, reducing the intensity of manual labor. After welding, the downward-pressing cylinder drives the top positioning mechanism upward. The contact block cooperates with the outer wedge to drive the inner wedge away from each other, and the connecting rod mechanism drives the clamping plate to automatically release the clamp, assisting in the removal of the welded workpiece and facilitating workpiece unloading. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 One of the structural diagrams of the middle section; Figure 3 This is a schematic diagram of the internal positioning mechanism of the present invention; Figure 4 This is a schematic diagram of the static tensioning component and the dynamic tensioning component of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the dynamic tensioning component of the present invention; Figure 6 This is a schematic diagram of the disassembled structure of the limiting component of the present invention; Figure 7 For the present invention Figure 1 The second structural diagram of the middle section; Figure 8 This is a schematic diagram of the structure of the present invention.

[0022] In the picture: 1. Circumferential seam welding machine; 11. Welding wheel; 2. Pump body; 3. Internal positioning mechanism; 31. Base; 32. Servo motor; 321. Splined shaft; 33. Support column; 331. Adjusting slide; 34. Liquid inlet; 35. Nozzle; 36. Static tensioning assembly; 37. Dynamic tensioning assembly; 371. Receiving block; 372. Connecting groove; 373. Slider; 374. Disc groove; 375. Slot; 376. Drive disc; 377. Limiting groove; 378. Spline groove; 379. Limiting rod; 3701. Tensioning arc plate; 3702. Ball bearing; 3703. Limiting insertion rod; 38. Limiting component; 381. Receiving ring; 382. Inner ring; 383. Bevel gear ring; 384. Rubber pad; 385. Bevel gear; 4. Downward-pressing cylinder; 41. Outer wedge block; 5. Top positioning mechanism; 51. Support frame; 52. Inner slide; 53. Linkage rod; 531. Connecting plate; 532. Connecting rod; 533. Spring 1; 54. Side sliding plate; 55. Inner wedge block; 551. Spring 2; 552. Abutting block; 56. Clamping plate; 57. Linkage rod 1; 58. Linkage rod 2; 59. Inner slider; 6. Oil reservoir; 7. Bottom cover. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Example: Please refer to Figures 1-8 The automatic welding and positioning fixture for the oil reservoir and bottom cover of a shock absorber shown includes a circumferential welding machine 1, an inner positioning mechanism 3 and a top positioning mechanism 5. The processing end of the circumferential welding machine 1 is provided with two symmetrical welding wheels 11. The inner positioning mechanism 3 is located between the two welding wheels 11. A downward pressure cylinder 4 is installed on one side of the circumferential welding machine 1. The top positioning mechanism 5 is located above the inner positioning mechanism 3. The internal positioning mechanism 3 includes a base 31 and a ring of supporting columns 33 above it, as well as a static tensioning component 36 fixedly connected to the top of the supporting column 33 and a dynamic tensioning component 37 inside the supporting column 33. A limit component 38 is provided above the dynamic tensioning component 37, and a slider 373 is installed on the periphery of the dynamic tensioning component 37. The static tensioning component 36 is completely identical to the dynamic tensioning component 37. The dynamic tensioning assembly 37 includes a receiving block 371 and a drive disk 376 rotatably connected inside it. A ring-shaped set of limiting rods 379 is provided above the drive disk 376. The top positioning mechanism 5 includes a support frame 51, an inner slide 52, a linkage rod 53, a side sliding plate 54, two inner wedges 55 and two clamping plates 56. The linkage rod 53 and the side sliding plate 54 are slidably connected to the inner side of the support frame 51. The support frame 51 is fixedly connected to the telescopic end of the downward pressing cylinder 4. A pump body 2 is provided on the outside of the circumferential welder 1, and two external wedges 41 are installed on one side of the circumferential welder 1; Among them, the outer side of the circumferential welder 1 is equipped with a controller to control the operation of other equipment; the welding wheel 11 is the processing end of the existing circumferential welder, which can be clamped by the cylinders on both sides to the oil storage tank 6 and the bottom cover 7 in the middle, and after being clamped and powered on, it can perform welding treatment on the circumferential seam. At the same time, there is a coolant supply pipe on its outside to cool the weld. Meanwhile, the coolant can fall into the collection tank below, and then the pump body 2 can transport part of the coolant so that the coolant can enter the interior of the receiving column 33. The static tensioning assembly 36 is identical to the dynamic tensioning assembly 37 except that it lacks the slider 373 and the limiting assembly 38. However, the static tensioning assembly 36 is fixedly connected to the inner side of the top of the receiving column 33. The height of the dynamic tensioning assembly 37 can be adjusted by the cooperation of the slider 373 and the limiting assembly 38, thereby adapting to oil reservoirs 6 of different lengths.

[0025] In this embodiment, a connecting groove 372 is provided on the periphery of the receiving block 371, the slider 373 is installed on the inner side of the connecting groove 372, a disk groove 374 is provided inside the receiving block 371, a ring-shaped slot 375 is provided at the upper end of the disk groove 374, a limiting rod 379 is slidably connected inside the slot 375, and the driving disk 376 is located inside the disk groove 374. The connecting groove 372 fits around the outer periphery of the receiving column 33; the receiving block 371 has a hole at its center, through which the spline shaft 321 can pass, but is not connected, and the spline shaft 321 only drives the drive disk 376 to rotate.

[0026] In this embodiment, the two ends of the limiting rod 379 are respectively fixedly connected to the limiting insert rod 3703 and the tensioning arc plate 3701. The outer wall of the tensioning arc plate 3701 is embedded with evenly distributed balls 3702. The drive disk 376 has four annularly distributed limiting grooves 377 and a spline groove 378 in the middle. The limiting insert rod 3703 is slidably connected in the limiting groove 377. When the drive disc 376 rotates, it can force the limit rod 3703 to move, thereby causing the limit rod 379 to expand outward, so that the tensioning arc plate 3701 is close to the inner wall of the oil reservoir 6. At this time, the ball 3702 will be close to the inner wall of the oil reservoir 6, so that the oil reservoir 6 can be concentric with the spline shaft 321. In addition, the ball 3702 can make the positioned oil reservoir 6 rotate. Similarly, the static tensioning component 36 can also be tensioned outwards for positioning, but the static tensioning component 36 tensions the overlapping part of the oil reservoir 6 and the bottom cover 7, thereby reducing the gap between the two.

[0027] In this embodiment, the base 31 is rotatably connected to one side of the circumferential welding machine 1. A servo motor 32 is installed inside the base 31. A spline shaft 321 is installed at the output end of the servo motor 32. The spline shaft 321 passes through the static tensioning assembly 36 and the receiving block 371. The spline shaft 321 fits into the interior of the spline groove 378. The circumferential welding machine 1 has a support frame plate on one side, which allows the base 31 to be rotatably connected to its inner side. The base 31 is used to protect the servo motor 32 inside it.

[0028] In this embodiment, an adjusting groove 331 is provided on the inner side of the receiving column 33, an inlet 34 is provided on the outer side of the bottom end of the receiving column 33, and a nozzle 35 is provided on the outer side of the top end of the receiving column 33. The inlet 34 is connected to the nozzle 35, and the inlet 34 is connected to the output end of the pump body 2 through a hose. The slider 373 is located inside the adjusting groove 331. The receiving column 33 has an embedded channel that connects the liquid inlet 34 and the nozzle 35, so that the coolant can be sprayed out from the nozzle 35 after the pump body 2 is operated, and then, in conjunction with the cooling pipe of the existing equipment, the weld joint can be cooled and cooled simultaneously inside and out.

[0029] In this embodiment, the limiting component 38 includes a receiving ring 381 and an inner ring 382 rotatably connected thereto. The receiving ring 381 is fixedly connected above the receiving block 371. A bevel gear ring 383 is fixedly connected above the inner ring 382. A ring-shaped rubber pad 384 is fixedly connected around the outer periphery of the inner ring 382. One side of the rubber pad 384 is attached to the outer periphery of the receiving post 33. A bevel gear 385 is rotatably connected to one side of the receiving ring 381. The bevel gear 385 is meshed with the upper part of the bevel gear ring 383. The limiting component 38 is used to limit and adjust the height of the dynamic tensioning component 37. Specifically, before connecting the oil reservoir 6, the bevel gear 385 is rotated in advance according to the length of the oil reservoir 6 so that the rubber pad 384 does not fit the outer periphery of the receiving column 33. Then, the height of the dynamic tensioning component 37 is manually adjusted and the bevel gear 385 is rotated in the opposite direction, so that the bevel ring 383 and the inner ring 382 rotate with the rubber pad 384, so that the rubber pad 384 fits the outer side of the receiving column 33. Thus, the internal positioning mechanism 3 can be adapted to oil reservoirs 6 of different lengths for eccentric correction through the dynamic tensioning component 37.

[0030] In this embodiment, the inner slide 52 is fixedly connected to the lower inner side of the supporting frame 51. Two symmetrical inner slide blocks 59 are slidably connected to one side of the inner slide 52. The inner wedge block 55 is located on the other side of the inner slide 52. The top end of the linkage rod 53 is fixedly connected to the connecting plate 531. The bottom of the other end of the connecting plate 531 is fixedly connected to the connecting rod 532. The connecting rod 532 is fixedly connected to the top of the side sliding plate 54. A spring 533 is provided around the linkage rod 53. Among them, the linkage rod 53, the connecting plate 531, and the connecting rod 532 can move up and down synchronously, while the spring 533 is used to keep the three of them always downward. Thus, when the pressing cylinder 4 drives the top positioning mechanism 5 to move down as a whole, the spring 533 can buffer and position it. During the upward movement, the inner wedge block 55 will force the inner slider 59 to move closer to each other. Then, through the connecting rod 58, the other end of the connecting rod 57 will clamp the oil reservoir 6 in the middle with the clamping plate 56, thereby enabling external clamping and positioning.

[0031] In this embodiment, two symmetrical inner wedges 55 are slidably connected below the side sliding plate 54. A spring 551 is provided on one side of the sliding connection of the inner wedges 55, and an abutment block 552 is fixedly connected to one side of the inner wedges 55. The abutment block 552 cooperates with the outer wedge 41, and the inner side of the inner wedges 55 cooperates with the inner slider 59. When the top positioning mechanism 5 moves upward, the outer side of the contact block 552 will be pushed by the outer wedge block 41, thereby causing the two inner wedge blocks 55 to move away from each other, thereby causing the two sides of the inner slider 59 to lose pressure, thereby releasing the welded shock absorber oil cylinder, thus completing the auxiliary feeding. The top groove of the inner wedge block 55 connects to both ends of the side sliding plate 54, while the second spring 551 is located on one side of the sliding connection. It is used to reset the inner wedge block 55 after the abutment block 552 engages with the outer wedge block 41.

[0032] In this embodiment, a second connecting rod 58 is rotatably connected to one side of the inner slider 59, and a first connecting rod 57 is rotatably connected to the other end of the second connecting rod 58. One end of the first connecting rod 57 is rotatably connected to the clamping plate 56, and the other end of the first connecting rod 57 is rotatably connected to the supporting frame 51. The inner wall of the clamping plate 56 is made of high-temperature resistant rubber; one side of the inner slider 59 can be squeezed by the inner side of the inner wedge block 55 so that they come closer together.

[0033] In this embodiment, a bottom cover 7 and an oil reservoir 6 are pre-assembled between the two welding wheels 11. The oil reservoir 6 is sleeved around the inner positioning mechanism 3, and the bottom cover 7 is located below the linkage rod 53. The oil reservoir 6 and the bottom cover 7 are welded together to form the oil tank of the shock absorber.

[0034] The working principle of this invention is as follows: When welding is required, the worker can first insert the bottom end of the bottom cover 7 into the upper port of the oil reservoir 6 to form the oil reservoir of the shock absorber to be welded. Then, the cylinder to be welded is sleeved around the liquid inlet 34, and the inner positioning mechanism 3 is pushed to rotate to the welding end of the circumferential welder 1. Then, the servo motor 32 is operated by the external controller, which causes the static tensioning component 36 and the dynamic tensioning component 37 to expand and clamp the inner wall of the cylinder to be welded. The tensioning of the dynamic tensioning component 37 makes the cylinder to be welded coincide with the central axis of the spline shaft 321, thereby radially correcting the eccentricity caused by manual pre-assembly. At the same time, the internal support is continuously tightened throughout the welding process. When the welding wheel applies radial pressure, the cylinder will not wobble radially. When the static tensioning component 36 is tensioned outward, it can expand the overlapping area of ​​the oil reservoir 6 and the bottom cover 7 outward, thereby reducing the gap between the oil reservoir 6 and the bottom cover 7 and forming support inside. Then, when it is clamped and welded by the copper disc welding wheel at the welding end of the circumferential welding machine 1, it can cooperate with the copper disc welding wheel to form synchronous positioning inside and outside, reduce the welding gap, and make the welding more solid. Furthermore, after the welding cylinder is fitted around the inlet 34 and the inner positioning mechanism 3 is rotated to the welding end of the circumferential welding machine 1, the external controller can also drive the pressing cylinder 4 to move the top positioning mechanism 5 downward, so that the bottom end of the linkage rod 53 first contacts the bottom cover 7 and continues to press down for positioning. At the same time, the connecting plate 531 will drive the connecting rod 532, the side sliding plate 54 and the inner wedge block 55 to move upward, thereby pushing the two inner sliders 59 in the inner slide 52 to move closer to each other, thus through the connecting rod 58 The connecting rod 57 enables the clamping plate 56 to position and clamp the outer periphery of the oil reservoir 6. This allows the oil reservoir 6 to be clamped and fixed before it is clamped by the copper disc welding wheel, at which point the workers can release the support. On the other hand, after welding is completed, the contraction of the downward cylinder 4 forces the top positioning mechanism 5 to move upward with the welded workpiece. When it moves to the outer wedge 41, it forces the two inner wedges 55 to move away from each other, thereby causing the clamping plate 56 to lose its clamping force, which in turn helps to pull out the welded workpiece.

[0035] The circumferential welder 1, pump body 2, servo motor 32 and pressing cylinder 4 used in this invention are all existing known electrical devices, and can all be purchased and used directly on the market. Their structure, circuit and control principle are all existing known technologies. Therefore, the structure, circuit and control principle of the circumferential welder 1, pump body 2, servo motor 32 and pressing cylinder 4 will not be described in detail here.

[0036] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic welding and positioning fixture for a shock absorber oil reservoir and a bottom cover, comprising a circumferential welding machine (1), an inner positioning mechanism (3), and a top positioning mechanism (5), characterized in that: The processing end of the circumferential weld machine (1) is provided with two symmetrical welding wheels (11), the inner positioning mechanism (3) is located between the two welding wheels (11), a downward pressure cylinder (4) is installed on one side of the circumferential weld machine (1), and the top positioning mechanism (5) is located above the inner positioning mechanism (3). The inner positioning mechanism (3) includes a base (31) and a ring of supporting columns (33) above it, as well as a static tensioning component (36) fixedly connected to the top of the supporting column (33) and a dynamic tensioning component (37) inside the supporting column (33). A limit component (38) is provided above the dynamic tensioning component (37), and a slider (373) is installed on the periphery of the dynamic tensioning component (37). The static tensioning component (36) and the dynamic tensioning component (37) are completely identical. The dynamic tensioning assembly (37) includes a receiving block (371) and a drive disk (376) rotatably connected inside it. A ring-shaped set of limiting rods (379) is provided above the drive disk (376). The top positioning mechanism (5) includes a support frame (51), an inner slide (52), a linkage rod (53), a side sliding plate (54), two inner wedges (55) and two clamping plates (56). The linkage rod (53) and the side sliding plate (54) are slidably connected to the inner side of the support frame (51) and the support frame (51) is fixedly connected to the telescopic end of the downward cylinder (4). The circumferential welder (1) has a pump body (2) on its outer side and two external wedges (41) installed on one side of the circumferential welder (1).

2. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: The receiving block (371) has a connecting groove (372) on its periphery. The slider (373) is installed inside the connecting groove (372). The receiving block (371) has a disc groove (374) inside. The upper end of the disc groove (374) has a ring-shaped slot (375). The limiting rod (379) is slidably connected inside the slot (375). The driving disc (376) is located inside the disc groove (374).

3. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: The two ends of the limiting rod (379) are respectively fixedly connected to the limiting insert rod (3703) and the tensioning arc plate (3701). The outer wall of the tensioning arc plate (3701) is embedded with evenly distributed balls (3702). The drive disk (376) has four annularly distributed limiting grooves (377) and a spline groove (378) in the middle. The limiting insert rod (3703) is slidably connected in the limiting groove (377).

4. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: The base (31) is rotatably connected to one side of the circumferential welding machine (1). A servo motor (32) is installed inside the base (31). A spline shaft (321) is installed at the output end of the servo motor (32). The spline shaft (321) passes through the static tensioning assembly (36) and the receiving block (371). The spline shaft (321) fits into the interior of the spline groove (378).

5. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: The inner side of the receiving column (33) is provided with an adjusting groove (331), the outer side of the bottom end of the receiving column (33) is provided with an inlet (34), the outer side of the top end of the receiving column (33) is provided with a nozzle (35), the inlet (34) is connected to the nozzle (35), the inlet (34) is connected to the output end of the pump body (2) through a hose, and the slider (373) is located inside the adjusting groove (331).

6. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: The limiting component (38) includes a receiving ring (381) and an inner ring (382) rotatably connected therein. The receiving ring (381) is fixedly connected above the receiving block (371). A bevel ring (383) is fixedly connected above the inner ring (382). A ring-shaped rubber pad (384) is fixedly connected around the outer periphery of the inner ring (382). One side of the rubber pad (384) is attached to the outer periphery of the receiving column (33). A bevel gear (385) is rotatably connected to one side of the receiving ring (381). The bevel gear (385) is meshed above the bevel ring (383).

7. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: The inner slide (52) is fixedly connected to the lower inner side of the supporting frame (51). Two symmetrical inner sliders (59) are slidably connected to one side of the inner slide (52). The inner wedge (55) is located on the other side of the inner slide (52). A connecting plate (531) is fixedly connected to the top of the linkage rod (53). A connecting rod (532) is fixedly connected to the lower part of the other end of the connecting plate (531). The connecting rod (532) is fixedly connected to the upper part of the side sliding plate (54). A spring (533) is provided on the periphery of the linkage rod (53).

8. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: Two symmetrical inner wedges (55) are slidably connected below the side sliding plate (54). A spring (551) is provided on one side of the sliding connection of the inner wedges (55). An abutment block (552) is fixedly connected to one side of the inner wedges (55). The abutment block (552) cooperates with the outer wedge block (41). The inner side of the inner wedges (55) cooperates with the inner slider (59).

9. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 7, characterized in that: One side of the inner slider (59) is rotatably connected to a second connecting rod (58), and the other end of the second connecting rod (58) is rotatably connected to a first connecting rod (57). One end of the first connecting rod (57) is rotatably connected to a clamping plate (56), and the other end of the first connecting rod (57) is rotatably connected to a supporting frame (51).

10. The automatic welding and positioning fixture for the shock absorber oil reservoir and bottom cover according to claim 1, characterized in that: Between the two welding wheels (11), there is a bottom cover (7) and an oil reservoir (6) pre-assembled on the upper and lower sides. The oil reservoir (6) is sleeved around the inner positioning mechanism (3), and the bottom cover (7) is located below the linkage rod (53).

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