A welding positioner

Abstract

The present application discloses a novel welding positioner, comprising a frame, the frame comprising a first mounting seat, a second mounting seat connecting block, a movable seat arranged between the first mounting seat and the second mounting seat, a first rotating rod rotatably connected to the first mounting seat fixed to the side wall on one side of the movable seat, a second rotating rod rotatably connected to the second mounting seat rotatably arranged on the side wall on the other side of the movable seat, a workbench rotatably arranged on the top of the movable seat, and a motor fixed to the bottom of the movable seat; a fixing assembly is arranged on the second mounting seat, and a driving mechanism for driving the first rotating rod to rise or rotate is installed on the first mounting seat. In the present application, when the sizes of the workpieces to be welded are different and the height of the workbench needs to be adjusted, the staff needs to release the fixing state of the second rotating rod, and drive the first rotating rod to rise through the driving mechanism, so that the height of the movable seat and the workbench can be adjusted, which is convenient for processing workpieces of different heights and sizes, and expands the scope of application of the welding positioner.

Description

Technical Field

[0001] The invention relates to the technical field of positioners, in particular to a novel welding positioner. Background Art

[0002] The positioner is a special welding auxiliary equipment, suitable for welding position shifting in rotary work to obtain the ideal processing position and welding speed. It can be used in conjunction with the operator and welding machine to form an automatic welding center, and can also be used for workpiece position shifting during manual operation. The worktable rotation adopts stepless speed regulation of the inverter with high speed regulation accuracy. The remote control box can realize remote operation of the worktable, and can also be connected with the operator and welding machine control system to realize linkage operation. The requirements for precision in modern welding processing are increasing year by year, and traditional positioners can no longer meet the requirements of modern processing for precision.

[0003] The welding positioner in the prior art can usually only adjust the deflection angle of the workbench, but it is difficult to adjust the height of the workbench, which virtually narrows the application scope of the welding positioner. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a novel welding positioner.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a new type of welding positioner, comprising a frame, the frame comprising a first mounting seat with a hollow interior, a second mounting seat and a connecting block fixed between the second mounting seat and the first mounting seat, a movable seat is arranged between the first mounting seat and the second mounting seat, a first rotating rod rotatably connected to the first mounting seat is fixed to a side wall on one side of the movable seat, a second rotating rod rotatably connected to the second mounting seat is rotatably mounted on a side wall on the other side of the movable seat, a workbench is rotatably mounted on the top of the movable seat, and a motor for driving the workbench to rotate is fixed to the bottom of the movable seat;

[0006] A first sliding groove for sliding connection of the first rotating rod is provided on one side of the first mounting seat close to the workbench, a second sliding groove for sliding connection of the second rotating rod is provided through the second mounting seat, a fixing component for fixing the second rotating rod is provided on the second mounting seat, and a driving mechanism for driving the first rotating rod to rise or rotate is installed on the first mounting seat.

[0007] By adopting the above technical solution, when the sizes of workpieces to be welded are different and the height of the workbench needs to be adjusted, the staff needs to adjust the fixing component to release the fixing state of the second rotating rod, and then drive the first rotating rod to rise through the driving mechanism, so that the height of the movable seat and the workbench can be adjusted, thereby facilitating the processing of workpieces of different heights and sizes, which is conducive to expanding the application scope of the welding positioner.

[0008] Furthermore, the driving mechanism includes a rotating component, an operating component and a lifting component, the rotating component includes a worm wheel fixedly mounted on the first rotating rod and a worm rotatably connected to the inner wall of the first mounting seat and meshing with the worm wheel, the axial direction of the worm is perpendicular to the axial direction of the first rotating rod, and the operating component is used to drive the worm to rotate.

[0009] By adopting the above technical solution, when adjusting the deflection angle of the workbench, the staff only needs to use the operating component to drive the worm to rotate, so that the worm causes the worm wheel meshing with the worm to rotate, so that the first rotating rod, the movable seat fixed to the first rotating rod and the workbench rotatably mounted on the movable seat rotate, so that the workpiece to be welded fixed on the workbench can be rotated, so as to adjust the workpiece to an angle convenient for welding processing.

[0010] Furthermore, a movable groove is provided in the worm gear, and the operating component includes a rotating shaft that is penetrated by the first mounting seat and rotatably connected to the first mounting seat, a crank fixed to the end of the rotating shaft away from the worm gear, a central shaft fixed to the end of the rotating shaft close to the worm gear and rotatably connected to the movable groove, a positioning block fixed to the end of the central shaft away from the rotating shaft, and a spring sleeved on the rotating shaft, a side wall of the movable groove away from the crank is provided with a limiting hole for the positioning block to be plugged in, one end of the spring abuts against the end of the central shaft away from the positioning block, and the other end of the spring abuts against the inner wall of the movable groove.

[0011] By adopting the above technical solution, during normal use, under the elastic force of the spring, the positioning block is plugged into the limiting hole, limiting the circumferential free rotation of the center axis, thereby fixing the center axis and the movable groove in the worm, and when using the operating component to drive the worm wheel to rotate, the staff only needs to turn the crank to rotate the rotating shaft, thereby rotating the center axis and the worm, thereby rotating the worm wheel, so that the first rotating rod rotates, and the movable seat rotates with the first rotating rod. Therefore, the workbench can be rotated, and the angle of the workpiece to be welded fixed on the workbench can be adjusted, which is beneficial to the welding work.

[0012] Furthermore, a first vertical slide groove for sliding connection of the rotating shaft is formed through the side wall of the first mounting seat, and the lifting assembly includes an L-shaped plate slidingly connected to the inner wall of the first mounting seat, a mounting block fixed to the side wall of the first mounting seat, a vertical rack fixed to the side wall of the mounting block, and a gear fixedly sleeved on the crank and meshing with the vertical rack;

[0013] One end of the first rotating rod away from the workbench is rotatably connected to the side wall of the L-shaped plate, one end of the worm is rotatably connected to the side wall of the L-shaped plate, a gap is left between the other end of the worm and the inner wall of the first mounting seat, the axis of the gear coincides with the axis of the rotating shaft, a pin is penetrated through the rotating shaft and matches the clearance of the rotating shaft, the diameter of the pin is larger than the width of the first vertical slide groove, when the gear is meshed with the vertical rack, the pin abuts against the outer wall of the first mounting seat, and the positioning block is separated from the limiting hole.

[0014] By adopting the above technical solution, when adjusting the height of the workbench, the staff first needs to adjust the fixing assembly to release the lock on the second rotating rod. At this time, the staff needs to pull the gear toward the side away from the worm gear through the crank, and the rotating shaft, the central shaft, and the positioning block all move synchronously with the crank until the gear is meshed with the vertical rack. The staff needs to pass the pin through the fine hole on the rotating shaft and match it with the rotating shaft gap to prevent the central shaft from resetting under the action of the spring. At this time, the positioning block is separated from the limit hole. When the staff rotates the rotating shaft through the crank, the gear also rotates. Since the gear is meshed with the vertical rack, the gear moves upward in the vertical direction. At the same time, the rotating shaft, the central shaft, the worm wheel, the worm, the L-shaped plate, the first rotating rod, the movable seat and the workbench all move upward in the vertical direction until the height of the workbench is adjusted to the required height. The staff needs to pull out the pin and fix the second rotating rod again through the fixing assembly, so that the new welding positioner can be fixed, which is conducive to the welding work. Since the worm gear has a self-locking function, the worm gear will not drive the worm gear to rotate when there is no external force touching the crank handle. The angle of the workbench is relatively stable, which facilitates the smooth progress of the workpiece welding work.

[0015] Furthermore, a slide is fixed to the side wall of the L-shaped plate away from the workbench, a second vertical slide groove is provided on the inner wall of the first mounting seat for sliding connection of the slide, a ball is embedded in the side wall of the slide away from the workbench, an arc-shaped groove is provided on the side wall of the second vertical slide groove for rolling connection of the ball, four balls are provided and distributed in a rectangular array, and two arc-shaped grooves are provided and both are vertically arranged.

[0016] By adopting the above technical solution, the L-shaped plate and the first mounting seat are slidingly connected via the slide plate and the second vertical slide groove. The arrangement of the ball bearing and the arc-shaped groove reduces the sliding friction between the slide plate and the second vertical slide groove.

[0017] Furthermore, the fixing assembly includes a nut sleeved on the second rotating rod and threadedly connected to the second rotating rod, and a rubber gasket sleeved on the second rotating rod and gap-fitted with the second rotating rod. Two of the nut and rubber gasket are provided, and the two nuts are respectively located on both sides of the second mounting seat, and the rubber gasket is located between the nut and the second mounting seat.

[0018] By adopting the above technical solution, after tightening the two nuts, the nuts cooperate with the second mounting seat and press against the rubber gasket, thereby increasing the friction between the nuts and the second mounting seat, thereby fixing the second rotating rod and the second mounting seat, and fixing the position of the workbench.

[0019] Furthermore, the top of the first mounting seat is open and provided with a cover plate, and the cover plate is fixedly connected to the top of the first mounting seat by bolts.

[0020] By adopting the above technical solution, the arrangement of the cover plate and the bolts makes it easier for workers to install the components in the first mounting seat.

[0021] Furthermore, a chamfered portion is provided at the intersection between the end of the positioning block away from the rotating shaft and the side wall of the positioning block.

[0022] By adopting the above technical solution and setting the chamfered portion, the difficulty of the staff in resetting the central axis is reduced, so that the positioning block and the limiting hole can be smoothly plugged in.

[0023] In summary, the present invention has the following beneficial effects:

[0024] 1. In this application, when the sizes of workpieces to be welded are different and the height of the workbench needs to be adjusted, the staff needs to adjust the fixing assembly to release the fixing state of the second rotating rod, and then drive the first rotating rod to rise through the driving mechanism, so that the height of the movable seat and the workbench can be adjusted, so as to facilitate the processing of workpieces of different heights and sizes, which is conducive to expanding the application scope of the welding positioner;

[0025] 2. In the present application, during normal use, under the elastic force of the spring, the positioning block is plugged into the limiting hole, limiting the circumferential free rotation of the central axis, so that the central axis is fixed to the movable groove in the worm. When the operating assembly is used to drive the worm gear to rotate, the staff only needs to turn the crank to rotate the rotating shaft, so that the central axis and the worm are rotated, thereby rotating the worm gear, so that the first rotating rod is rotated, and the movable seat rotates with the first rotating rod. Therefore, the workbench can be rotated, and the angle of the workpiece to be welded fixed on the workbench can be adjusted, which is conducive to the welding work;

[0026] 3. In the present application, when adjusting the height of the workbench, the staff first needs to adjust the fixing assembly to release the lock on the second rotating rod. At this time, the staff needs to use the crank to pull the gear toward the side away from the worm gear. The rotating shaft, the central shaft, and the positioning block all move synchronously with the crank until the gear is meshed with the vertical rack. The staff needs to pass the pin through the fine hole on the rotating shaft and match it with the clearance of the rotating shaft to prevent the central shaft from resetting under the action of the spring. At this time, the positioning block is separated from the limit hole. When the staff rotates the rotating shaft through the crank, the gear also rotates. Since the gear is meshed with the vertical rack, the gear moves upward in the vertical direction. At the same time, the rotating shaft, the central shaft, the worm gear, the worm, the L-shaped plate, the first rotating rod, the movable seat and the workbench all move upward in the vertical direction until the height of the workbench is adjusted to the required height. The staff needs to pull out the pin and fix the second rotating rod again through the fixing assembly, so that the new welding positioner can be fixed, which is conducive to the welding work. Since the worm gear has a self-locking function, the worm gear will not drive the worm gear to rotate when there is no external force touching the crank handle. The angle of the workbench is relatively stable, which facilitates the smooth progress of the workpiece welding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 , Figure 2 All of them are schematic diagrams of the overall structure of the embodiments of the present invention;

[0028] Figure 3 is a schematic diagram of the internal structure of the first mounting base in an embodiment of the present invention;

[0029] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;

[0030] Figure 5 yes Figure 3 The enlarged schematic diagram of point B in the middle;

[0031] Figure 6 It is a schematic structural diagram of an embodiment of the present invention for highlighting the ball.

[0032] In the figure: 1, frame; 11, first mounting seat; 111, cover plate; 1111, bolt; 12, second mounting seat; 121, second slide groove; 13, connecting block; 14, first slide groove; 15, first vertical slide groove; 16, second vertical slide groove; 17, arc groove; 2, ball bearing; 3, driving mechanism; 31, rotating assembly; 311, worm gear; 312, worm; 3121, movable groove; 3122, limiting hole; 32, operating assembly; 32 1. Rotating shaft; 322. Crank; 323. Central shaft; 324. Positioning block; 3241. Chamfered portion; 325. Spring; 33. Lifting assembly; 331. L-shaped plate; 3311. Slide plate; 332. Mounting block; 333. Vertical rack; 334. Gear; 4. Movable seat; 41. First rotating rod; 42. Second rotating rod; 43. Workbench; 44. Motor; 5. Fixing assembly; 51. Nut; 52. Rubber gasket; 6. Latch. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0034] like Figure 1-6 As shown, the embodiment of the present application discloses a novel welding positioner, including a frame 1, a movable seat 4 and a driving mechanism 3. The frame 1 includes a first mounting seat 11 with a hollow interior, a second mounting seat 12 and a connecting block 13 fixed between the second mounting seat 12 and the first mounting seat 11, a movable seat 4 is arranged between the first mounting seat 11 and the second mounting seat 12, a first rotating rod 41 rotatably connected to the first mounting seat 11 is fixed to the side wall on one side of the movable seat 4, a second rotating rod 42 rotatably connected to the second mounting seat 12 is rotatably installed on the side wall on the other side of the movable seat 4, a workbench 43 is rotatably installed on the top of the movable seat 4, and a motor 44 for driving the workbench 43 to rotate is fixed to the bottom of the movable seat 4. In this embodiment, the top of the first mounting seat 11 is open and is provided with a cover plate 111, and the cover plate 111 is fixedly connected to the top of the first mounting seat 11 by bolts 1111.

[0035] A first slide groove 14 for sliding connection of the first rotating rod 41 is provided on one side of the first mounting seat 11 close to the workbench 43, and a second slide groove 121 for sliding connection of the second rotating rod 42 is provided on the second mounting seat 12. A fixing component 5 for fixing the second rotating rod 42 is provided on the second mounting seat 12. The fixing component 5 includes a nut 51 which is sleeved on the second rotating rod 42 and threadedly connected to the second rotating rod 42, and a rubber gasket 52 which is sleeved on the second rotating rod 42 and loosely fitted with the second rotating rod 42. Two nuts 51 and two rubber gaskets 52 are provided. The two nuts 51 are respectively located on both sides of the second mounting seat 12, and the rubber gasket 52 is located between the nut 51 and the second mounting seat 12.

[0036] The driving mechanism 3 is arranged on the first mounting seat 11, and is used to drive the first rotating rod 41 to rise or rotate. The driving mechanism 3 includes a rotating component 31, an operating component 32 and a lifting component 33. The rotating component 31 includes a worm wheel 311 fixedly mounted on the first rotating rod 41 and a worm 312 rotatably connected to the inner wall of the first mounting seat 11 and meshing with the worm wheel 311. The axial direction of the worm 312 is perpendicular to the axial direction of the first rotating rod 41, and the operating component 32 is used to drive the worm 312 to rotate.

[0037] A movable groove 3121 is provided in the worm gear 312, and the operating component 32 includes a rotating shaft 321 which is penetrated by the first mounting seat 11 and is rotatably connected to the first mounting seat 11, a crank 322 fixed to the end of the rotating shaft 321 away from the worm gear 311, a central shaft 323 fixed to the end of the rotating shaft 321 close to the worm gear 311 and rotatably connected to the movable groove 3121, a positioning block 324 fixed to the end of the central shaft 323 away from the rotating shaft 321, and a spring 325 sleeved on the rotating shaft 321, a limiting hole 3122 for the positioning block 324 to be plugged in and cooperated with is provided on the side wall of the movable groove 3121 away from the crank 322, one end of the spring 325 abuts against the end of the central shaft 323 away from the positioning block 324, and the other end of the spring 325 abuts against the inner wall of the movable groove 3121.

[0038] A first vertical groove 15 is formed through the side wall of the first mounting seat 11 for sliding connection with the rotating shaft 321. The lifting assembly 33 includes an L-shaped plate 331 that is slidingly connected to the inner wall of the first mounting seat 11, a mounting block 332 fixed to the side wall of the first mounting seat 11, a vertical rack 333 fixed to the side wall of the mounting block 332, and a gear 334 fixedly mounted on the crank 322 and meshing with the vertical rack 333. One end of the first rotating rod 41 away from the workbench 43 is rotatably connected to the side wall of the L-shaped plate 331, one end of the worm 312 is rotatably connected to the side wall of the L-shaped plate 331, and a gap is left between the other end of the worm 312 and the inner wall of the first mounting seat 11, the axis of the gear 334 coincides with the axis of the rotating shaft 321, and a pin 6 is provided on the rotating shaft 321 to fit the rotating shaft 321 with a clearance, and the diameter of the pin 6 is greater than the width of the first vertical sliding groove 15. When the gear 334 is meshed with the vertical rack 333, the pin 6 abuts against the outer wall of the first mounting seat 11, and the positioning block 324 is separated from the limiting hole 3122.

[0039] When adjusting the height of the workbench 43, the staff must first loosen the two nuts 51 to release the lock on the second rotating rod 42. At this time, the staff must use the crank 322 to pull the gear 334 toward the side away from the worm gear 311. The rotating shaft 321, the center shaft 323, and the positioning block 324 all move synchronously with the crank 322 until the gear 334 engages with the vertical rack 333. The staff must pass the pin 6 through the fine hole on the rotating shaft 321 and fit it with the clearance of the rotating shaft 321 to prevent the center shaft 323 from resetting under the action of the spring 325. At this time, the positioning block 324 is separated from the limit hole 3122. When the staff rotates the rotating shaft 321 through the crank 322, the gear 334 also rotates. Since the gear 334 is meshed with the vertical rack 333, the gear 334 moves upward in the vertical direction. At the same time, the rotating shaft 321, the central shaft 323, the worm wheel 311, the worm 312, the L-shaped plate 331, the first rotating rod 41, the movable seat 4 and the workbench 43 all move upward in the vertical direction until the height of the workbench 43 is adjusted to the required height. The staff needs to pull out the latch 6 and tighten the two nuts 51 again to fix the second rotating rod 42, so that the new welding positioner can be fixed, which is conducive to the welding work. Since the worm wheel 311 and the worm 312 have a self-locking effect, when there is no external force touching the crank 322, the worm wheel 311 will not drive the worm 312 to rotate, and the angle of the workbench 43 is relatively stable, which is convenient for the smooth progress of the workpiece welding work.

[0040] In order to reduce the friction between the L-shaped plate 331 and the inner wall of the first mounting seat 11, a slide plate 3311 is fixed to the side wall of the L-shaped plate 331 away from the workbench 43, and a second vertical slide groove 16 for the slide plate 3311 to slide and connect is provided on the inner wall of the first mounting seat 11. A ball 2 is embedded in the side wall of the slide plate 3311 away from the workbench 43, and an arc groove 17 for the ball 2 to roll and connect is provided on the side wall of the second vertical slide groove 16. There are four balls 2 and they are distributed in a rectangular array, and there are two arc grooves 17 and they are both vertically arranged. In order to reduce the difficulty of plugging between the positioning block 324 and the limiting hole 3122, a chamfered portion 3241 is provided at the intersection between the end of the positioning block 324 away from the rotating shaft 321 and the side wall of the positioning block 324.

[0041] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A welding positioner, characterized by: The machine frame (1) comprises a first mounting seat (11) with a hollow interior, a second mounting seat (12), and a connecting block (13) fixed between the second mounting seat (12) and the first mounting seat (11); a movable seat (4) is arranged between the first mounting seat (11) and the second mounting seat (12); a first rotating rod (41) rotatably connected to the first mounting seat (11) is fixed to a side wall on one side of the movable seat (4); a second rotating rod (42) rotatably connected to the second mounting seat (12) is rotatably mounted on the side wall on the other side of the movable seat (4); a workbench (43) is rotatably mounted on the top of the movable seat (4); and a motor (44) for driving the workbench (43) to rotate is fixed to the bottom of the movable seat (4); A first slide groove (14) for slidingly connecting the first rotating rod (41) is provided on a side of the first mounting seat (11) close to the workbench (43); a second slide groove (121) for slidingly connecting the second rotating rod (42) is provided on the second mounting seat (12); a fixing component (5) for fixing the second rotating rod (42) is provided on the second mounting seat (12); and a driving mechanism (3) for driving the first rotating rod (41) to rise or rotate is installed on the first mounting seat (11); The driving mechanism (3) comprises a rotating assembly (31), an operating assembly (32) and a lifting assembly (33); the rotating assembly (31) comprises a worm wheel (311) fixedly sleeved on the first rotating rod (41) and a worm (312) rotatably connected to the inner wall of the first mounting seat (11) and meshing with the worm wheel (311); the axial direction of the worm (312) is perpendicular to the axial direction of the first rotating rod (41); and the operating assembly (32) is used to drive the worm (312) to rotate; The worm (312) has a movable groove (3121) formed therein, and the operating assembly (32) comprises a rotating shaft (321) penetrating the first mounting seat (11) and rotatably connected to the first mounting seat (11), a crank (322) fixed to an end of the rotating shaft (321) away from the worm gear (311), a central shaft (323) fixed to an end of the rotating shaft (321) close to the worm gear (311) and rotatably connected to the movable groove (3121), and a crank (322) fixed to the central shaft (323). A positioning block (324) is fixed at one end away from the rotating shaft (321) and a spring (325) is sleeved on the rotating shaft (321); a limiting hole (3122) for the positioning block (324) to be plugged and matched is opened on the side wall of the movable groove (3121) away from the crank (322); one end of the spring (325) abuts against one end of the central shaft (323) away from the positioning block (324), and the other end of the spring (325) abuts against the inner wall of the movable groove (3121); The side wall of the first mounting seat (11) is penetrated by a first vertical sliding groove (15) for sliding connection of the rotating shaft (321); the lifting assembly (33) comprises an L-shaped plate (331) slidingly connected to the inner wall of the first mounting seat (11), a mounting block (332) fixed to the side wall of the first mounting seat (11), a vertical rack (333) fixed to the side wall of the mounting block (332), and a gear (334) fixedly sleeved on the crank (322) and meshing with the vertical rack (333); One end of the first rotating rod (41) away from the workbench (43) is rotatably connected to the side wall of the L-shaped plate (331), one end of the worm (312) is rotatably connected to the side wall of the L-shaped plate (331), a gap is left between the other end of the worm (312) and the inner wall of the first mounting seat (11), the axis of the gear (334) coincides with the axis of the rotating shaft (321), a latch (6) is provided on the rotating shaft (321) and is clearance-matched with the rotating shaft (321), the diameter of the latch (6) is greater than the width of the first vertical sliding groove (15), when the gear (334) is meshed with the vertical rack (333), the latch (6) abuts against the outer wall of the first mounting seat (11), and the positioning block (324) is separated from the limiting hole (3122); A slide plate (3311) is fixed to the side wall of the L-shaped plate (331) away from the workbench (43); a second vertical slide groove (16) for sliding connection of the slide plate (3311) is provided on the inner wall of the first mounting seat (11); a ball (2) is embedded in the side wall of the slide plate (3311) away from the workbench (43); an arc-shaped groove (17) for rolling connection of the ball (2) is provided on the side wall of the second vertical slide groove (16); four balls (2) are provided and distributed in a rectangular array; two arc-shaped grooves (17) are provided and are both vertically arranged.

2. A welding positioner according to claim 1, characterized in that: The fixing assembly (5) comprises a nut (51) sleeved on the second rotating rod (42) and threadedly connected to the second rotating rod (42), and a rubber gasket (52) sleeved on the second rotating rod (42) and loosely matched with the second rotating rod (42), wherein two of the nut (51) and two of the rubber gasket (52) are provided, and the two nuts (51) are respectively located on both sides of the second mounting seat (12), and the rubber gasket (52) is located between the nut (51) and the second mounting seat (12).

3. A welding positioner according to claim 2, characterized in that: The top of the first mounting seat (11) is open and provided with a cover plate (111); the cover plate (111) is fixedly connected to the top of the first mounting seat (11) via bolts (1111).

4. A welding positioner according to claim 2, characterized in that: A chamfered portion (3241) is provided at the intersection between one end of the positioning block (324) away from the rotating shaft (321) and the side wall of the positioning block (324).

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