Improved stud welding gripper for robot

Abstract

The stud welding gripper comprises a fixing block, an adjusting mechanism, a limiting mechanism, a mounting mechanism, a mounting groove, an air cylinder, a connecting block, supporting rods, clamping rods, groove holes and clamping plates, the mounting groove is formed in the front end of the fixing block, the air cylinder is arranged in the mounting groove, the connecting block is arranged at the front end of the air cylinder, and the supporting rods are arranged at the upper end and the lower end of the connecting block; clamping plates are arranged at the front ends of the sides, close to each other, of the clamping rods, an adjusting mechanism is arranged at the rear end of the fixing block, a limiting mechanism is arranged in the adjusting mechanism, and a mounting mechanism is arranged at the rear end of the limiting mechanism. The welding fixture has the advantages that the welding fixture has a good fixing effect on stud parts and can be suitable for studs with different diameters, threads of the studs are not prone to being damaged, and meanwhile the angle can be conveniently changed when welding is carried out at different angles after clamping is carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of robot welding grippers, in particular to an improved stud welding gripper for a robot. Background Art

[0002] Energy storage stud welding is a relatively mature technology and is widely used in the automotive, elevator, home appliance and other industries. Energy storage stud welding equipment mainly includes a stud welding gun, a welding power supply, and a stud feeding device. During welding, the positive electrode of the welding power supply is connected to the stud on the stud welding gun, and the ground of the welding power supply is connected to the workpiece to be welded. A large current passes through the stud and the workpiece to weld them together. During welding, the stud needs to be clamped and fixed. The existing technology does not have a special gripper for stud welding with a robotic arm.

[0003] Publication No. CN216939136U discloses a stable clamping welding gripper, including a stable clamping welding gripper, including a base and a supporting plate installed above it, the lower right end of the supporting plate is connected to the lower plate, the upper right end of the supporting plate is provided with an upper plate that can move up and down, the upper plate and the left ends of the front and rear sides of the lower plate are connected to a fixing plate, an electric push rod 1 is installed on the fixing plate below, the power output end of the electric push rod 1 is connected to the lower side of the fixing plate above, the right ends of the front and rear sides of the lower plate are connected to the lower connecting blocks, the right ends of the front and rear sides of the upper plate are connected to the upper connecting blocks, a through hole is opened on the upper connecting block that passes through the lower side, a limiting plate 2 is provided at the upper end inside the through hole, a limiting plate 1 for limiting the limiting plate 2 is provided at the lower end inside the through hole, and a slide groove is opened at the upper right end of the supporting plate; the utility model can clamp the workpiece more stably and avoid the workpiece position from being offset, but the prior art still has disadvantages:

[0004] 1. The prior art grabs and clamps the workpiece by installing an upper plate and a lower plate and by moving a screw rod and a slider. Although this can provide a more stable clamping effect on the workpiece, it still cannot achieve a very stable clamping effect when clamping the stud.

[0005] 2. The existing technology cannot adjust the angle of the part when clamping, and the part needs to be positioned when clamping, which affects the working efficiency. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects and provide an improved stud welding gripper for a robot.

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: an improved stud welding gripper for a robot, comprising a fixed block, an angle adjustment mechanism is arranged at the rear end of the fixed block, a limiting mechanism is arranged in the middle of the rear end of the angle adjustment mechanism, a mounting mechanism is arranged at the rear end of the limiting mechanism, a mounting groove is opened in the middle of the front end of the fixed block, a cylinder is fixedly connected to the inside of the mounting groove, a connecting block is fixedly connected to the front end of the cylinder, a support rod is rotatably connected to the middle of the upper and lower ends of the connecting block through a pin shaft, a clamping rod is rotatably connected to the middle of the upper and lower ends of the fixed block through a pin shaft, a through slot hole is opened in the middle of the upper end of the clamping rod, the end of the support rod away from the connecting block is rotated in the slot hole through a pin shaft, and the front end of the clamping rod close to each other is fixedly connected with a C-shaped clamping plate.

[0008] As an improvement, the angle adjustment mechanism includes a worm wheel fixedly connected to the rear end of the fixed block, a worm is meshed on one side of the worm wheel, the upper and lower ends of the worm are rotatably connected to a fixed plate through bearings, and the upper end of the worm is fixedly connected to a motor.

[0009] As an improvement, the limiting mechanism includes a fixing groove which passes through the front side of the worm wheel, a limiting rod is inserted into the inner side of the fixing groove, an annular limiting groove is provided in the middle part of the inner side of the fixing groove, an annular limiting ring is inserted into the inner side of the limiting groove, the limiting ring is fixedly connected to the outer front part of the limiting rod, and the worm wheel is rotatably connected to the outer front part of the limiting rod through the limiting ring and the limiting groove.

[0010] As an improvement, the mounting mechanism includes a connecting plate fixedly connected to the rear end of the limiting rod, and mounting blocks are fixedly connected to the upper and lower parts of both sides of the rear end of the connecting plate, and a threaded hole is opened at the rear end of the mounting block.

[0011] As an improvement, the rear end of the fixing plate is fixedly connected to one side of the front end of the connecting plate, and the rear end of the motor is fixedly connected to one side of the front end of the connecting plate.

[0012] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention clamps the clamping plate fixedly connected to the front end of the clamping rod close to each other through cylinder control. The special shape of the clamping plate can have a good fixing effect on stud parts and can be suitable for studs of different diameters. The thread of the stud is not easily damaged by the support on both sides.

[0013] 2. The utility model installs an adjustment mechanism at the rear end of the supporting mechanism for conveniently changing the angle when welding at different angles after supporting. The worm and turbine installed in the adjustment mechanism can effectively prevent reversal after stopping rotation, and the rolling engagement of the worm wheel and the worm has higher precision than other rotating devices, making the angle change more stable and more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereogram of the utility model.

[0015] Figure 2 It is a cross-sectional view of the regulating mechanism of the utility model.

[0016] Figure 3 It is a cross-sectional view of the installation mechanism of the utility model.

[0017] As shown in the figure: 1. fixing block; 2. adjusting mechanism; 21. worm gear; 22. worm; 23. fixing plate; 24. motor; 3. limiting mechanism; 31. fixing groove; 32. limiting rod; 33. limiting groove; 34. limiting ring; 4. mounting mechanism; 41. connecting plate; 42. mounting block; 43. threaded hole; 5. mounting groove; 51. cylinder; 52. connecting block; 53. support rod; 54. clamping rod; 55. slot hole; 56. clamping plate. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] The utility model, combined with the attached Figure 1 The utility model installs a mounting mechanism 4 for connecting to the robot at the rear end of the connecting plate 41, including mounting blocks 42 fixedly connected to the upper and lower parts of both sides of the rear end of the connecting plate 41, and threaded holes 43 for installing studs are provided at the rear end of the mounting blocks 42, and a limiting mechanism 3 for fixing the front end supporting mechanism is installed at the front end of the connecting plate 41.

[0020] The limiting mechanism 3 includes a limiting rod 32 fixedly connected to the middle part of the front end of the connecting plate 41, and an annular limiting ring 34 is fixedly connected to the outer front end of the limiting rod 32. A penetrating fixing groove 31 is opened in the middle part of the front end of the worm gear 21, and an annular limiting groove 33 is opened in the middle part of the inner side of the fixing groove 31. The worm gear 21 is sleeved on the outer side of the limiting ring 34 through the limiting groove 33. Because the limiting ring 34 and the limiting groove 33 are both annular, the worm gear 21 is rotatably connected to the outer front end of the limiting rod 32 through the limiting ring 34 and the limiting groove 33. An adjusting mechanism 2 for controlling the angle adjustment of the clamping mechanism is installed on one side of the worm gear 21.

[0021] The adjustment mechanism 2 includes two fixing plates 23 fixedly connected to the middle of one side of the front end of the connecting plate 41, a worm 22 is rotatably connected to the middle of the fixing plates 23 on both sides through bearings, and a motor 24 for providing power is fixedly connected to the upper end of the worm 22.

[0022] A clamping mechanism for holding the stud is installed at the front end of the worm gear 21, including a fixed block 1 fixedly connected to the front end of the worm gear 21, a mounting groove 5 is provided at the front end of the fixed block 1, a cylinder 51 for controlling the clamping mechanism is fixedly connected inside the mounting groove 5, a clamping rod 54 is rotatably connected to the upper and lower ends of the fixed block 1 through a pin shaft, a through slot hole 55 is provided in the middle of the upper end of the two clamping rods 54, a support rod 53 is rotatably connected to the front end of the inner side of the slot hole 55 through a pin shaft, the ends of the two support rods 53 that are close to each other are rotatably connected to the connecting block 52 through a pin shaft, the connecting block 52 is fixedly connected to the front end of the cylinder 51, and a C-shaped clamping plate 56 suitable for holding the stud is fixedly connected to the front end of the clamping rod 54 that is close to each other.

[0023] When the utility model is implemented, the utility model is first fixed on the robot through the mounting block 42 and the threaded hole 43 at the rear end, and then the utility model is moved to the outside of the stud by the robot, and then the cylinder 51 is started, the cylinder 51 retracts, and the connecting block 52 is moved backward, and the support rod 53 connected to the upper and lower ends of the connecting block 52 is rotated to pull the middle part of the clamping rod 54 toward the side close to each other, and the clamping plate 56 fixedly connected to the front end of the clamping rod 54 close to each other clamps the bolt, and after the robot moves the bolt to the welding location, the motor 24 rotates, and the worm 22 drives the worm wheel 21 to rotate to adjust the angle of the bolt, so that it can be conveniently adjusted when welding at different angles.

[0024] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An improved stud welding gripper for a robot, characterized in that: The invention comprises a fixed block (1), wherein an angle adjustment mechanism (2) is arranged at the rear end of the fixed block (1), a limiting mechanism (3) is arranged at the middle of the rear end of the angle adjustment mechanism (2), and a mounting mechanism (4) is arranged at the rear end of the limiting mechanism (3). A mounting groove (5) is arranged at the middle of the front end of the fixed block (1), a cylinder (51) is fixedly connected inside the mounting groove (5), a connecting block (52) is fixedly connected at the front end of the cylinder (51), a support rod (53) is rotatably connected at the middle of the upper and lower ends of the connecting block (52) through a pin shaft, a clamping rod (54) is rotatably connected at the middle of the front side of the upper and lower ends of the fixed block (1) through a pin shaft, a through slot hole (55) is arranged at the middle of the upper end of the clamping rod (54), one end of the support rod (53) away from the connecting block (52) is rotated inside the slot hole (55) through a pin shaft, and a C-shaped clamping plate (56) is fixedly connected at the front end of the clamping rod (54) on the side close to each other.

2. The improved stud welding gripper for a robot according to claim 1, characterized in that: The angle adjustment mechanism (2) comprises a worm wheel (21) fixedly connected to the rear end of the fixed block (1); a worm (22) is meshed on one side of the worm wheel (21); the upper and lower ends of the worm (22) are rotatably connected to a fixed plate (23) via bearings; and the upper end of the worm (22) is fixedly connected to a motor (24).

3. The improved stud welding gripper for a robot according to claim 2, characterized in that: The limiting mechanism (3) comprises a fixing groove (31) which is provided on the front side of the worm wheel (21) and passes through the fixing groove (31); a limiting rod (32) is inserted into the inner side of the fixing groove (31); an annular limiting groove (33) is provided in the middle part of the inner side of the fixing groove (31); an annular limiting ring (34) is inserted into the inner side of the limiting groove (33); the limiting ring (34) is fixedly connected to the outer front part of the limiting rod (32); and the worm wheel (21) is rotatably connected to the outer front part of the limiting rod (32) through the limiting ring (34) and the limiting groove (33).

4. The improved stud welding gripper for a robot according to claim 3, characterized in that: The mounting mechanism (4) comprises a connecting plate (41) fixedly connected to the rear end of the limiting rod (32), the upper and lower parts of the rear end of the connecting plate (41) are fixedly connected to mounting blocks (42), and the rear end of the mounting block (42) is provided with a threaded hole (43).

5. The improved stud welding gripper for a robot according to claim 4, characterized in that: The rear end of the fixing plate (23) is fixedly connected to one side of the front end of the connecting plate (41), and the rear end of the motor (24) is fixedly connected to one side of the front end of the connecting plate (41).

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