Positioning tool for hydraulic cylinder welding

Abstract

This utility model relates to the field of welding positioning technology and discloses a positioning fixture for hydraulic cylinder welding. It includes a housing, a motor fixedly connected to the top of the housing, a sun gear fixedly connected to the motor's output end, multiple planetary gears meshing with the inner wall of the sun gear, internal gear rings meshing with the inner walls of each planetary gear, and planet carriers rotatably connected to the inner walls of each planetary gear. The inner wall of the sun gear has multiple first guide grooves, and pressing blocks are slidably connected to the inner walls of each of the first guide grooves. A rotating column is rotatably connected to the inner walls of each of the planetary gears, a sliding block is fixedly connected to the right end of the rotating column, and a guide plate slides on the outer wall of the rotating column. In this utility model, starting the motor on the top of the housing causes the sun gear to rotate. The sun gear meshes with the inner wall, and through the cooperation of subsequent components, ultimately clamps the hydraulic cylinder, providing stable positioning for welding.

Description

Technical Field

[0001] This utility model relates to the field of welding positioning technology, and in particular to a positioning fixture for welding hydraulic cylinders. Background Technology

[0002] Positioning fixtures for hydraulic cylinder welding play a crucial role in the welding process of hydraulic cylinder barrels, end caps, and nozzle components. They are used to precisely fix and calibrate the various components of the hydraulic cylinder before welding, and to adjust and stably clamp the coaxiality and perpendicularity of the cylinder barrel, end cap, and nozzle components. This allows welders to accurately operate the welding torch to complete the welding operation and reduces welding deviations. Positioning fixtures for hydraulic cylinder welding are widely used in hydraulic cylinder production workshops in the fields of engineering machinery, metallurgical equipment, and hydraulic device manufacturing, and are adapted to the batch welding processing needs of hydraulic cylinders of different specifications.

[0003] When precisely fixing and calibrating the various components of the hydraulic cylinder before welding, and adjusting and stably clamping the coaxiality and perpendicularity of the cylinder barrel, end cap, and nozzle components, positioning fixtures for hydraulic cylinder welding are required. Existing positioning fixtures for hydraulic cylinder welding are mostly single clamping structures that require manual adjustment of the clamping jaw position. This can easily lead to uneven force and positional deviation when clamping the hydraulic cylinder barrel, resulting in coaxiality deviation between the cylinder barrel and the end cap and nozzle components during welding. This significantly increases production costs, and the error of manual adjustment can lead to a decrease in the sealing performance of the hydraulic cylinder after welding, unstable operation, and ultimately reduced product quality and service life. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a positioning fixture for welding hydraulic cylinders, which aims to improve the problems of uneven force during hydraulic cylinder clamping, positional deviation, and difficulty in automatic alignment in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a positioning fixture for welding hydraulic cylinders, comprising a housing, a motor fixedly connected to the top of the housing, a sun gear fixedly connected to the output end of the motor, multiple planetary gears meshing with the inner wall of the sun gear, internal gear rings meshing with the inner walls of the multiple planetary gears, planet carriers rotatably connected to the inner walls of the multiple planetary gears, multiple first guide grooves beginning on the inner wall of the sun gear, pressing blocks slidably connected to the inner walls of the multiple first guide grooves, rotating columns rotatably connected to the inner walls of the multiple planetary gears, a sliding block fixedly connected to the right end of the rotating column, a guide disc slidably connected to the outer wall of the rotating column, a gripper slidably connected to the inner wall of the sliding block, and a support mechanism fixedly connected to the bottom of the housing, the support mechanism being used to adjust multiple support points to prevent the excessively long hydraulic cylinder from falling off due to insufficient support.

[0006] As a further description of the above technical solution:

[0007] The support mechanism includes a base plate, the top of which is fixedly connected to the bottom of the housing. Multiple brackets are fixedly connected to the inner wall of the base plate. A rotating shaft is rotatably connected between adjacent brackets. Multiple second guide grooves are formed on the inner wall of the rotating shaft. A sliding rod is slidably connected to the inner wall of each of the multiple second guide grooves. A sliding platform is fixedly connected to the top of the sliding rod. Multiple lifting cylinders are fixedly connected to the top of the sliding platform. An arc-shaped plate is fixedly connected to the top of each of the multiple lifting cylinders.

[0008] As a further description of the above technical solution:

[0009] The outer wall of the extrusion block is slidably connected to a shell, and the left side of the shell is fixedly connected to the right side of the box.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the outer shell has multiple third guide grooves, and the outer wall of the third guide grooves is fixedly connected with multiple limiting blocks.

[0012] As a further description of the above technical solution:

[0013] The inner wall of the box is threaded with multiple fixing nuts near the edge, and the inner wall of the fixing nuts is threaded to the inner wall of the bottom plate.

[0014] As a further description of the above technical solution:

[0015] A controller is fixedly connected to the front side of the housing, and the controller is electrically connected to the motor and the lifting cylinder respectively.

[0016] As a further description of the above technical solution:

[0017] A support frame is fixedly connected to the top of the base plate, and a welding gun is rotatably connected to the inner wall of the support frame.

[0018] As a further description of the above technical solution:

[0019] The bottom of the base plate is fixedly connected to multiple support legs, and the inner wall of the rotating shaft is fixedly connected to a throttle handle.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the motor on the top of the start-up box drives the sun gear to rotate. The sun gear meshes with the inner wall, driving multiple planetary gears to rotate. The planetary gears mesh with the internal gear ring and rotate around the planetary carrier to ensure stable transmission. In the first guide groove on the inner wall of the sun gear, the extrusion block slides outward with the rotation of the sun gear, pressing against the inner wall of the hydraulic cylinder to complete the initial positioning. The planetary gear drives the rotating column on the inner wall to move. The rotating column slides along the guide plate, and the sliding block at its right end drives the gripper to move radially synchronously, finally clamping the hydraulic cylinder, providing stable positioning for welding, which can improve product quality and increase service life.

[0022] 2. In this utility model, the support mechanism has a base plate fixed to the bottom of the box, providing a stable foundation for the whole. Multiple supports on the inner wall of the base plate support the adjacent rotating shafts. When the rotating shafts rotate, the second guide groove on the inner wall drives the sliding rod to slide along the groove, thereby adjusting the lateral position of the sliding platform at the top of the sliding rod and achieving equidistant position adjustment. This prevents uneven support and slippage caused by inconsistent spacing between support points when manually adjusted. After the lifting cylinder at the top of the sliding platform is activated, it can drive the arc plate at the top to move up and down, adjusting the support height. Through the cooperation of the rotating shaft, sliding rod and lifting cylinder, the position and height of the arc plate can be flexibly adjusted to form multi-directional support, meeting the support requirements of excessively long hydraulic cylinders. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a positioning fixture for welding hydraulic cylinders proposed in this utility model;

[0024] Figure 2 This is a side view of a positioning fixture for welding hydraulic cylinders according to the present invention.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0026] Figure 4 This is a partial structural exploded view of a positioning fixture for welding hydraulic cylinders proposed in this utility model;

[0027] Figure 5 This is a partial structural schematic diagram of a positioning fixture for welding hydraulic cylinders proposed in this utility model.

[0028] Legend:

[0029] 1. Housing; 2. Support mechanism; 201. Base plate; 202. Bracket; 203. Rotating shaft; 204. Second guide groove; 205. Sliding rod; 206. Sliding platform; 207. Lifting cylinder; 208. Arc plate; 3. Motor; 4. Sun gear; 5. Planetary gear; 6. Internal gear ring; 7. Planetary carrier; 8. First guide groove; 9. Extrusion block; 10. Rotating column; 11. Sliding block; 12. Guide plate; 13. Gripper; 14. Outer shell; 15. Third guide groove; 16. Limiting block; 17. Fixing nut; 18. Controller; 19. Support frame; 20. Welding torch; 21. Support leg; 22. Rotary handle. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 4 An embodiment of this utility model provides a positioning fixture for welding hydraulic cylinders, comprising a housing 1, a motor 3 fixedly connected to the top of the housing 1, a sun gear 4 fixedly connected to the output end of the motor 3, multiple planetary gears 5 meshing with the inner wall of the sun gear 4, internal gear rings 6 meshing with the inner walls of the multiple planetary gears 5, planet carriers 7 rotatably connected to the inner walls of the multiple planetary gears 5, multiple first guide grooves 8 starting from the inner wall of the sun gear 4, pressing blocks 9 slidably connected to the inner walls of the multiple first guide grooves 8, rotating columns 10 rotatably connected to the inner walls of the multiple planetary gears 5, a sliding block 11 fixedly connected to the right end of the rotating column 10, a guide disc 12 slidably connected to the outer wall of the rotating column 10, a gripper 13 slidably connected to the inner wall of the sliding block 11, and a support mechanism 2 fixedly connected to the bottom of the housing 1. The support mechanism 2 is used to adjust multiple support points to prevent the excessively long hydraulic cylinder from falling off due to insufficient support.

[0032] Specifically, the housing 1 serves as the basic load-bearing component, while the top-mounted motor 3 provides power for positioning and clamping. After starting, the motor 3 drives the sun gear 4 at its output end to rotate. The sun gear 4 meshes with multiple planetary gears 5, which in turn mesh with the internal gear ring 6 to ensure transmission stability. The planetary carrier 7 provides rotational support for the multiple planetary gears 5. Multiple first guide grooves 8 on the inner wall of the sun gear 4 provide a sliding path for the extrusion block 9. The extrusion block 9 can move within the grooves and expand outwards to press against the inner wall of the hydraulic rod, completing the initial positioning. The rotating column 10, rotatably connected to the inner wall of the planetary gears 5, follows... Planetary gear 5 moves, and its right end fixed sliding block 11 slides and engages with gripper 13. At the same time, the guide plate 12 on the outer wall of rotating column 10 restricts the direction of movement of rotating column 10, ultimately driving gripper 13 to move radially in sync, thus achieving stable clamping of hydraulic cylinder. The support mechanism 2 at the bottom of housing 1 can adjust the height and spacing of multiple support points. For excessively long hydraulic cylinders, the distribution of support points of support mechanism 2 can be adjusted to prevent hydraulic cylinders from falling off due to insufficient support, ensuring the overall stability of hydraulic cylinders during welding and meeting the welding positioning requirements of hydraulic cylinders of different lengths. The model of motor 3 is YS7124.

[0033] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 5 The support mechanism 2 includes a base plate 201. The top of the base plate 201 is fixedly connected to the bottom of the box 1. Multiple supports 202 are fixedly connected to the inner wall of the base plate 201. A rotating shaft 203 is rotatably connected between adjacent supports 202. Multiple second guide grooves 204 are formed on the inner wall of the rotating shaft 203. Sliding rods 205 are slidably connected to the inner walls of the multiple second guide grooves 204. A sliding platform 206 is fixedly connected to the top of the sliding rods 205. Multiple lifting cylinders 207 are fixedly connected to the top of the sliding platform 206. An arc plate 208 is fixedly connected to the top of the multiple lifting cylinders 207.

[0034] Specifically, in the support mechanism 2, the base plate 201 serves as the basic component, with its top fixed to the bottom of the housing 1, providing stable support for the entire support mechanism 2. Multiple supports 202 fixed to the inner wall of the base plate 201 support the rotating shaft 203 that connects adjacent supports 202. Multiple second guide grooves 204 on the inner wall of the rotating shaft 203 provide a sliding path for the sliding rod 205. The sliding rod 205 can move along the groove, driving the sliding platform 206 fixed at the top to adjust its lateral position and achieve equidistant position adjustment, preventing uneven support and slippage caused by inconsistent spacing between support points when manually adjusted. Multiple lifting cylinders 207 on the top of the sliding platform 206 can drive the arc plate 208 fixed at the top to rise and fall. By adjusting the position of the sliding platform 206 and the height of the arc plate 208, multi-support point adjustment can be achieved, avoiding insufficient support and fall due to excessively long hydraulic cylinders. The lifting cylinder 207 is model SC63×50-S.

[0035] Please see the appendix Figure 1 and attached Figure 2 The outer wall of the extrusion block 9 is slidably connected to the outer shell 14. The left side of the outer shell 14 is fixedly connected to the right side of the box 1. The inner wall of the box 1 is threaded with multiple fixing nuts 17 near the edge. The inner wall of the fixing nuts 17 is threadedly connected to the inner wall of the base plate 201. The inner wall of the outer shell 14 has multiple third guide grooves 15. The outer wall of the third guide grooves 15 is fixedly connected with multiple limit blocks 16.

[0036] Specifically, the left side of the outer shell 14 is fixed to the right side of the box body 1. The third guide groove 15 on its inner wall provides sliding guidance for the extrusion block 9 to prevent the extrusion block 9 from deviating when sliding. The limiting block 16 on the outer wall of the third guide groove 15 can limit the sliding range of the extrusion block 9 and prevent it from sliding out of the groove. The fixing nut 17 on the edge of the inner wall of the box body 1 is threaded to the inner wall of the base plate 201 to firmly fix the box body 1 and the base plate 201, improve the overall structural stability of the tooling, and ensure the coordinated work of each component.

[0037] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 A controller 18 is fixedly connected to the front side of the housing 1. The controller 18 is electrically connected to the motor 3 and the lifting cylinder 207 respectively. Multiple support feet 21 are fixedly connected to the bottom of the base plate 201. A throttle 22 is fixedly connected to the inner wall of the rotating shaft 203. A support frame 19 is fixedly connected to the top of the base plate 201. A welding torch 20 is rotatably connected to the inner wall of the support frame 19.

[0038] Specifically, the controller 18 on the front side of the housing 1 is electrically connected to the motor 3 and the lifting cylinder 207, which can control the start and stop and the operating parameters of both, so as to realize the automated operation of the tooling. The support feet 21 at the bottom of the base plate 201 can support the entire tooling and ensure stable placement. The handle 22 on the inner wall of the rotating shaft 203 makes it easy to manually rotate the rotating shaft 203 to adjust the position of the sliding platform 206. The support frame 19 on the top of the base plate 201 supports the welding gun 20, and the welding gun 20 can be rotated to adjust the angle for convenient welding operations.

[0039] Working principle: The motor 3 on the top of the housing 1 is started. The output end of the motor 3 drives the sun gear 4 to rotate. The sun gear 4 meshes with the inner wall and drives multiple planetary gears 5 to rotate. The planetary gears 5 mesh with the internal gear ring 6 and rotate around the planet carrier 7 to ensure stable transmission. In the first guide groove 8 on the inner wall of the sun gear 4, the pressing block 9 slides outward with the rotation of the sun gear 4 and presses against the inner wall of the hydraulic cylinder to complete the initial positioning. The planetary gear 5 drives the rotating column 10 on the inner wall to move. The rotating column 10 slides along the guide plate 12. The sliding block 11 at its right end drives the gripper 13 to move radially in sync, and finally clamps the hydraulic cylinder to provide stable positioning for welding.

[0040] In support mechanism 2, the base plate 201 is fixed to the bottom of the box 1, providing a stable foundation for the whole. Multiple brackets 202 on the inner wall of the base plate 201 support the adjacent rotating shafts 203. When the rotating shaft 203 rotates, the second guide groove 204 on its inner wall drives the sliding rod 205 to slide along the groove, thereby adjusting the lateral position of the sliding platform 206 at the top of the sliding rod 205 and realizing equidistant position adjustment. This prevents uneven support and slippage caused by inconsistent spacing between support points when manually adjusted. After the lifting cylinder 207 at the top of the sliding platform 206 is activated, it can drive the arc plate 208 at the top to move up and down, adjusting the support height. Through the cooperation of the rotating shaft 203, the sliding rod 205 and the lifting cylinder 207, the position and height of the arc plate 208 can be flexibly adjusted to form multi-directional support and meet the support requirements of excessively long hydraulic cylinders.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning fixture for welding hydraulic cylinders, comprising a housing (1), characterized in that: A motor (3) is fixedly connected to the top of the housing (1). A sun gear (4) is fixedly connected to the output end of the motor (3). Multiple planetary gears (5) are meshed with the inner wall of the sun gear (4). Internal gear rings (6) are meshed with the inner walls of the multiple planetary gears (5). Planet carriers (7) are rotatably connected to the inner walls of the multiple planetary gears (5). Multiple first guide grooves (8) are formed at the beginning of the inner wall of the sun gear (4). Extrusion blocks (9) are slidably connected to the inner walls of the multiple first guide grooves (8). Rotating columns (10) are rotatably connected to the inner walls of the multiple planetary gears (5). A sliding block (11) is fixedly connected to the right end of the rotating column (10). A guide disc (12) slides on the outer wall of the rotating column (10). A gripper (13) slides on the inner wall of the sliding block (11). A support mechanism (2) is fixedly connected to the bottom of the housing (1). The support mechanism (2) is used to adjust multiple support points to prevent the excessively long hydraulic cylinder from falling off due to insufficient support.

2. The positioning fixture for welding a hydraulic cylinder according to claim 1, characterized in that: The support mechanism (2) includes a base plate (201), the top of which is fixedly connected to the bottom of the box (1). Multiple supports (202) are fixedly connected to the inner wall of the base plate (201). A rotating shaft (203) is rotatably connected between adjacent supports (202). Multiple second guide grooves (204) are formed on the inner wall of the rotating shaft (203). Sliding rods (205) are slidably connected to the inner walls of the multiple second guide grooves (204). A sliding platform (206) is fixedly connected to the top of the sliding rod (205). Multiple lifting cylinders (207) are fixedly connected to the top of the sliding platform (206). An arc plate (208) is fixedly connected to the top of the multiple lifting cylinders (207).

3. The positioning fixture for welding a hydraulic cylinder according to claim 1, characterized in that: The outer wall of the extrusion block (9) is slidably connected to the outer shell (14), and the left side of the outer shell (14) is fixedly connected to the right side of the box body (1).

4. The positioning fixture for welding a hydraulic cylinder according to claim 3, characterized in that: The inner wall of the outer shell (14) has a plurality of third guide grooves (15), and the outer wall of the third guide grooves (15) is fixedly connected with a plurality of limiting blocks (16).

5. A positioning fixture for welding hydraulic cylinders according to claim 1, characterized in that: The inner wall of the box (1) is threaded with a plurality of fixing nuts (17) near the edge, and the inner wall of the fixing nuts (17) is threaded to the inner wall of the base plate (201).

6. A positioning fixture for welding hydraulic cylinders according to claim 1, characterized in that: A controller (18) is fixedly connected to the front side of the housing (1), and the controller (18) is electrically connected to the motor (3) and the lifting cylinder (207).

7. A positioning fixture for welding hydraulic cylinders according to claim 2, characterized in that: A support frame (19) is fixedly connected to the top of the base plate (201), and a welding gun (20) is rotatably connected to the inner wall of the support frame (19).

8. A positioning fixture for welding hydraulic cylinders according to claim 2, characterized in that: The bottom of the base plate (201) is fixedly connected with multiple support legs (21), and the inner wall of the rotating shaft (203) is fixedly connected with a throttle handle (22).

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