Multi-posture switchable stud welding mechanism

Abstract

The utility model relates to a multi-posture switchable stud welding mechanism which comprises a fixed support, a guide unit and a stud welding gun, and the guide unit comprises an air cylinder, a supporting platform, a rotating platform, a limiting block and a connecting plate; the air cylinder is rotatably fixed to the fixing support, the stud welding gun is fixed to the rotating platform, and the connecting plate and the supporting platform are fixed to the fixing support. One end of the rotating platform is rotatably fixed to the connecting plate, the other end of the rotating platform is connected with a telescopic rod of the air cylinder, the rotating platform is located on the supporting platform, a cam is arranged at the lower end of the rotating platform, the rotating platform rolls along the supporting platform, and the limiting block is fixed to the supporting platform and located on the moving track of the rotating platform. Compared with the prior art, the stud welding gun can be switched in multiple postures and has the advantages of being rapid in switching, compact in structure and the like.

Description

Technical Field

[0001] The utility model relates to the field of welding process equipment, in particular to a multi-posture switchable stud welding mechanism. Background Art

[0002] Stud welding is an important process welding process on passenger cars. All studs for installation and fixing on passenger cars are welded to sheet metal parts using stud welding guns. There are many studs on the body-in-white of passenger cars. Especially in recent years, the styles and configurations of passenger cars have been continuously improved, and the number of parts required to be assembled has also been increasing, resulting in a sharp increase in the number of studs. This requires a significant improvement in the efficiency and quality of stud welding. Car body welding generally uses stud welding and spot welding. When welding car body studs, it is generally necessary to weld on the front side. If studs need to be welded on both sides of the car body, the fixture needs to be flipped. This process has the potential safety hazards of parts falling off or the fixture hitting the operator during the flipping process.

[0003] For example, the invention with publication number CN111872526A discloses a stud welding detection device, in which the stud is welded to the workpiece to be welded by a welding gun, and includes a welding gun guide sleeve for guiding the welding gun for welding, and a sensor for detecting whether the welding gun is inserted into the welding gun guide sleeve. In this solution, the sensor can sense whether a part is inserted into the welding gun guide sleeve. If it is detected, it means that the welding gun is inserted. If it is not detected, it means that the welding gun is not inserted, and the position of the workpiece to be welded corresponding to the welding gun guide sleeve has not been subjected to the stud welding operation, thereby achieving the purpose of automatically checking whether there is a leak.

[0004] However, during the welding process, it is often necessary to use multiple stud welding devices with different postures, and the cost of the stud welding equipment is very expensive. After the existing stud welding equipment is fixed, the posture cannot be switched. Therefore, it is necessary to set up multiple stud welding devices at the same time, which increases the production cost. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-stance switchable stud welding mechanism in order to overcome the defect that in the welding process of the above-mentioned prior art, a plurality of stud welding devices with different postures are often required, and the stud welding devices cannot switch postures after being fixed, so a plurality of stud welding devices need to be set up at the same time, which increases the production cost.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A multi-stance switchable stud welding mechanism comprises a fixed bracket, a guide unit and a stud welding gun, wherein the guide unit comprises a cylinder, a support platform, a rotating platform, a limit block and a connecting plate; the cylinder is rotatably fixed on the fixed bracket, the stud welding gun is fixed on the rotating platform, and the connecting plate and the support platform are fixed on the fixed bracket;

[0008] One end of the rotating platform can be rotatably fixed on the connecting plate, and the other end is connected to the telescopic rod of the cylinder. The rotating platform is located on the supporting platform. A cam is provided at the lower end of the rotating platform. The rotating platform rolls along the supporting platform. The limit block is fixed on the supporting platform and is located on the moving track of the rotating platform.

[0009] Preferably, the cylinder is connected to the fixing bracket via a cylinder fixing member, and the cylinder fixing member includes a cylinder fixing base plate, a cylinder support frame and a cylinder connecting member;

[0010] The cylinder fixed base plate is fixed on the fixed bracket, the cylinder support frame is fixed on the cylinder fixed base plate to form a U-shaped notch structure, the cylinder connecting piece is fixed on the cylinder and is located in the U-shaped notch structure, and the cylinder connecting piece can be rotatably connected to the cylinder support frame.

[0011] Preferably, the limit block is a Z-shaped structure, one end of the limit block is fixed on the supporting platform, and the other end is provided with a T-shaped boss, and a notch matching the shape of the front end of the T-shaped boss is provided at the corresponding position of the rotating platform.

[0012] Preferably, a sensor for sensing the position of the rotating platform is provided on the supporting platform, the sensor is located on one side of the limit block, and the sensor is connected to the stud welding gun.

[0013] Preferably, a cam fixing frame is provided at the lower end of the rotating platform, the rotating platform is fixed on the rotating platform, and the cam is rotatably fixed on the cam fixing frame and contacts the supporting platform.

[0014] Preferably, there are multiple cam fixing frames and cams, and the movement tracks of the cams overlap.

[0015] Preferably, a Y-shaped joint is connected to the telescopic rod of the cylinder, one end of the Y-shaped joint is detachably fixed to the telescopic rod of the cylinder, and the other end is rotatably fixed to one end of the rotating platform.

[0016] Preferably, the rotating platform is provided with a connecting end, the connecting end cooperates with the U-shaped notch at the front end of the Y-shaped joint and is located in the U-shaped notch, and the connecting end is connected to the Y-shaped joint by bolts.

[0017] Preferably, the rotating platform comprises a rotating base and a rotating connecting plate, the stud welding gun is fixed on the rotating base, the rotating base is located on the supporting platform, one end of the rotating connecting plate is fixed on the rotating base, and the other end can be rotatably fixed on the connecting plate.

[0018] Preferably, the rotatable connecting plate is an L-shaped structure, and there are multiple rotatable connecting plate members, each rotatable connecting plate member is symmetrically distributed on both sides of the connecting plate, and the rotatable connecting plate member can be rotatably fixed on the connecting plate by a hinge pin.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] (1) After the rotating platform of this scheme completes the welding in the current posture, it switches the posture. The telescopic rod of the cylinder moves to drive one end of the rotating platform to rotate. The rotating platform uses the cam between it and the supporting platform to roll on the upper end of the supporting platform, thereby changing the posture of the stud welding gun on the rotating platform until the rotating platform contacts the limit block, the cylinder stops moving, and the stud welding gun completes the posture switch.

[0021] The stud welding gun is fixed on a rotating platform, and one end of the rotating platform is rotatably connected to a connecting plate fixed on a fixed bracket, and the rotating platform is driven to rotate by a cylinder telescopic rod connected to the other end of the rotating platform, and a cam is arranged at the lower end of the rotating platform to make the rotating platform roll along the supporting platform, thereby ensuring the stability of the movement of the rotating platform and improving the accuracy of the posture adjustment of the stud welding gun. The structure is compact and does not occupy space, and the linear action of the cylinder is converted into the rotation of the rotating platform. The action responds quickly, thereby improving the switching speed of the posture of the stud welding gun, and quickly switching between multiple postures reduces the number of stud welding guns, thereby effectively reducing the cost.

[0022] (2) This solution sets matching limit blocks and sensors on the support platform. Considering that the two are set at positions corresponding to the posture of the stud welding gun, that is, the position of the rotating platform is positioned so that the stud welding gun can stop at the corresponding position, and the rotating platform is fixed by bosses and grooves of matching shapes to ensure the working stability of the stud welding gun after the posture is adjusted. On the other hand, the sensor is used to sense whether the posture adjustment of the stud welding gun is satisfied, to assist the stud welding gun in starting work, and to improve the automation of the device and the continuity of action. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram of the stud welding mechanism provided by the utility model;

[0024] Figure 2 A schematic diagram of the structure of the guide unit provided by the utility model;

[0025] Figure 3 A structural schematic diagram of the switching posture of the guide unit provided by the utility model;

[0026] In the figure: 1, fixed bracket, 2, guide unit, 3, stud welding gun, 21, cylinder, 22, support platform, 23, rotating platform, 24, limit block, 25, connecting plate, 26, sensor, 211, cylinder fixed base plate, 212, cylinder support frame, 213, cylinder connecting piece, 214, Y-type joint, 231, cam fixing frame, 232, rotating connecting plate, 233, rotating base. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0031] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] Example 1

[0034] like Figure 1 and Figure 2 As shown, this embodiment provides a multi-stance switchable stud welding mechanism, including a fixed bracket 1, a guide unit 2 and a stud welding gun 3, the guide unit 2 includes a cylinder 21, a support platform 22, a rotating platform 23, a limit block 24 and a connecting plate 25; the cylinder 21 is rotatably fixed on the fixed bracket 1, the stud welding gun 3 is fixed on the rotating platform 23, and the connecting plate 25 and the support platform 22 are fixed on the fixed bracket 1;

[0035] One end of the rotating platform 23 can be rotatably fixed on the connecting plate 25, and the other end is connected to the telescopic rod of the cylinder 21. The rotating platform 23 is located on the supporting platform 22. A cam is provided at the lower end of the rotating platform 23. The rotating platform 23 rolls along the supporting platform 22. The limit block 24 is fixed on the supporting platform 22 and is located on the moving track of the rotating platform 23.

[0036] Working principle: After the rotating platform 23 completes the welding in the current posture, it switches the posture. The telescopic rod of the cylinder 21 moves to drive one end of the rotating platform 23 to rotate. The rotating platform 23 uses the cam between it and the supporting platform 22 to roll on the upper end of the supporting platform 22, thereby changing the posture of the stud welding gun 3 on the rotating platform 23 until the rotating platform 23 contacts the limit block 24, the cylinder 21 stops moving, and the stud welding gun 3 completes the posture switch.

[0037] By fixing the stud welding gun 3 on the rotating platform 23, and then rotatably connecting one end of the rotating platform 23 to the connecting plate 25 fixed on the fixed bracket 1, the telescopic rod of the cylinder 21 connected to the other end of the rotating platform 23 is used to drive the rotating platform 23 to rotate, and a cam is arranged at the lower end of the rotating platform 23 to make the rotating platform 23 roll along the supporting platform 22, thereby ensuring the stability of the movement of the rotating platform 23 and improving the accuracy of the posture adjustment of the stud welding gun 3. The structure is compact and does not occupy space. The linear action of the cylinder 21 is converted into the rotation of the rotating platform 23, and the action is rapid, thereby improving the switching speed of the posture of the stud welding gun 3, and the rapid switching of multiple postures reduces the number of stud welding guns 3, thereby effectively reducing the cost.

[0038] Specifically, the cylinder 21 is connected to the fixed bracket 1 through a cylinder fixing member, and the cylinder fixing member includes a cylinder fixing base plate 211, a cylinder support frame 212 and a cylinder connecting member 213;

[0039] The cylinder fixed base plate 211 is fixed on the fixed bracket 1, and the cylinder support frame 212 is fixed on the cylinder fixed base plate 211 to form a U-shaped notch structure. The cylinder connecting piece 213 is fixed on the cylinder 21 and is located in the U-shaped notch structure. The cylinder connecting piece 213 can be rotatably connected to the cylinder support frame 212.

[0040] Preferred implementation mode: Figure 3 As shown, the limit block 24 is a Z-shaped structure, one end of the limit block 24 is fixed on the support platform 22, and the other end is provided with a T-shaped boss, and a notch matching the shape of the front end of the T-shaped boss is provided at the corresponding position of the rotating platform 23. A sensor 26 for sensing the position of the rotating platform 23 is provided on the supporting platform 22, and the sensor 26 is located on one side of the limit block 24, and the sensor 26 is connected to the stud welding gun 3.

[0041] Matching limit blocks and sensors are set on the supporting platform. Considering that the two are set at the position corresponding to the posture of the stud welding gun, the position of the rotating platform is positioned so that the stud welding gun can stop at the corresponding position, and the rotating platform is fixed with bosses and slots of matching shapes to ensure the working stability of the stud welding gun after the posture is adjusted. On the other hand, the sensor is used to sense whether the posture adjustment of the stud welding gun is satisfied, which assists the stud welding gun to start working and improves the automation of the device and the continuity of the action.

[0042] Obviously, corresponding limit blocks and sensors are provided at positions corresponding to different postures of the stud welding gun to position the stud welding gun at various postures and start welding work after posture adjustment, thereby assisting in providing accuracy of posture adjustment of the mechanism.

[0043] Furthermore, a cam fixing frame 231 is provided at the lower end of the rotating platform 23, the rotating platform 23 is fixed on the rotating platform 23, and the cam is rotatably fixed on the cam fixing frame 231 and contacts the supporting platform 22. There are multiple cam fixing frames 231 and cams, and the moving tracks of each cam overlap.

[0044] By providing a plurality of cams, the contact area between the rotating platform 23 and the supporting platform 22 is increased, thereby improving the stability of the rotating platform 23 in movement and after reaching a preset posture.

[0045] Specifically, the telescopic rod of the cylinder 21 is connected with a Y-shaped joint 214, one end of the Y-shaped joint 214 is detachably fixed to the telescopic rod of the cylinder 21, and the other end is rotatably fixed to one end of the rotating platform 23. The rotating platform 23 is provided with a connecting end, which matches with the U-shaped notch at the front end of the Y-shaped joint 214 and is located in the U-shaped notch, and the connecting end is connected to the Y-shaped joint 214 by bolts.

[0046] Among them, the rotating platform 23 includes a rotating base 233 and a rotating connecting plate 232, the stud welding gun 3 is fixed on the rotating base 233, the rotating base 233 is located on the supporting platform 22, one end of the rotating connecting plate 232 is fixed on the rotating base 233, and the other end can be rotatably fixed on the connecting plate 25.

[0047] The rotatable connecting plate 232 is an L-shaped structure, and there are multiple rotatable connecting plate members 232. Each rotatable connecting plate member 232 is symmetrically distributed on both sides of the connecting plate 25. The rotatable connecting plate member 232 can be rotatably fixed on the connecting plate 25 through a hinge pin.

[0048] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A multi-stance switchable stud welding mechanism, characterized in that: The invention comprises a fixed support (1), a guide unit (2) and a stud welding gun (3); the guide unit (2) comprises a cylinder (21), a support platform (22), a rotating platform (23), a limit block (24) and a connecting plate (25); the cylinder (21) is rotatably fixed on the fixed support (1), the stud welding gun (3) is fixed on the rotating platform (23), and the connecting plate (25) and the support platform (22) are fixed on the fixed support (1); One end of the rotating platform (23) is rotatably fixed on the connecting plate (25), and the other end is connected to the telescopic rod of the cylinder (21). The rotating platform (23) is located on the supporting platform (22). A cam is provided at the lower end of the rotating platform (23). The rotating platform (23) rolls along the supporting platform (22). The limit block (24) is fixed on the supporting platform (22) and is located on the moving track of the rotating platform (23).

2. A multi-stance switchable stud welding mechanism according to claim 1, characterized in that: The cylinder (21) is connected to the fixed bracket (1) via a cylinder fixing member, wherein the cylinder fixing member comprises a cylinder fixing base plate (211), a cylinder support frame (212) and a cylinder connecting member (213); The cylinder fixed base plate (211) is fixed on the fixed bracket (1), the cylinder support frame (212) is fixed on the cylinder fixed base plate (211), forming a U-shaped notch structure, the cylinder connecting piece (213) is fixed on the cylinder (21) and is located in the U-shaped notch structure, and the cylinder connecting piece (213) can be rotatably connected to the cylinder support frame (212).

3. A multi-stance switchable stud welding mechanism according to claim 1, characterized in that: The limit block (24) is a Z-shaped structure, one end of the limit block (24) is fixed on the support platform (22), and the other end is provided with a T-shaped boss, and a notch matching the shape of the front end of the T-shaped boss is provided at a corresponding position of the rotating platform (23).

4. A multi-stance switchable stud welding mechanism according to claim 1, characterized in that: The support platform (22) is provided with a sensor (26) for sensing the position of the rotating platform (23); the sensor (26) is located on one side of the limit block (24); and the sensor (26) is connected to the stud welding gun (3).

5. The multi-stance switchable stud welding mechanism according to claim 1, characterized in that: A cam fixing frame (231) is provided at the lower end of the rotating platform (23), the rotating platform (23) is fixed on the rotating platform (23), and the cam is rotatably fixed on the cam fixing frame (231) and contacts the supporting platform (22).

6. A multi-stance switchable stud welding mechanism according to claim 5, characterized in that: The number of the cam fixing frame (231) and the cams is multiple, and the moving tracks of the cams overlap.

7. A multi-stance switchable stud welding mechanism according to claim 1, characterized in that: The telescopic rod of the cylinder (21) is connected to a Y-shaped joint (214), one end of the Y-shaped joint (214) is detachably fixed to the telescopic rod of the cylinder (21), and the other end is rotatably fixed to one end of the rotating platform (23).

8. A multi-stance switchable stud welding mechanism according to claim 7, characterized in that: The rotating platform (23) is provided with a connecting end, the connecting end is matched with the U-shaped notch at the front end of the Y-shaped joint (214) and is located in the U-shaped notch, and the connecting end is connected to the Y-shaped joint (214) by bolts.

9. The multi-stance switchable stud welding mechanism according to claim 1, characterized in that: The rotating platform (23) comprises a rotating base (233) and a rotating connecting plate (232), the stud welding gun (3) is fixed on the rotating base (233), the rotating base (233) is located on the supporting platform (22), one end of the rotating connecting plate (232) is fixed on the rotating base (233), and the other end is rotatably fixed on the connecting plate (25).

10. A multi-stance switchable stud welding mechanism according to claim 9, characterized in that: The rotating connecting plate member (232) is an L-shaped structure and is multiple in number. Each rotating connecting plate member (232) is symmetrically distributed on both sides of the connecting plate (25). The rotating connecting plate member (232) is rotatably fixed on the connecting plate (25) via a hinge pin.

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