Positioner for a welding station

Abstract

The utility model discloses a kind of positioners for welding workstation, comprising: support, operation platform, clamping disc, clamping assembly, first transmission assembly, second transmission assembly and control mechanism.Control mechanism is installed between a pair of rotary head, and control mechanism includes: third transmission shaft, pivot, rotating sleeve, arc sliding slot and reset component, third transmission shaft rotates on rotary disc, and it is fixed with first hemiglobosum gear between a pair of rotary head, pivot is fixed at clamping disc bottom, and its bottom end slidingly set has second hemiglobosum gear, pivot and second hemiglobosum gear are provided with the intermeshing sector teeth, the bottom end of second hemiglobosum gear is fixed with rotating ring, rotating sleeve rotates on rotating ring, and its both sides are fixed with a pair of control rod.The utility model is designed through coherence structure, can be realized the position adjustment of multiple angles according to welding needs, effectively improve the practicality of positioner.

Description

Technical Field

[0001] This utility model belongs to the field of positioner technology, specifically relating to a positioner for a welding workstation. Background Technology

[0002] Welding is an important machining method in modern industrial production, especially in the manufacture of large structural components or complex machine parts, where welding technology is indispensable. During the welding process, the weld seam needs to be in the optimal welding position to achieve the desired welding effect. A welding positioner is a device used to move the workpiece to be welded, guiding the weld seam to the ideal position for welding. It eliminates the need for vertical or overhead welding operations that may compromise weld quality, thus ensuring weld quality and improving welding productivity and process safety. Currently, existing welding positioners typically only have a single rotary control component that drives the worktable, allowing the worktable to rotate only one degree of freedom. Therefore, they cannot meet the multi-angle positioning requirements of complex welding workpieces.

[0003] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a positioner for a welding workstation.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a positioner for a welding workstation, which can solve the problem that existing welding positioners can only perform rotation in one degree of freedom.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] A positioner for a welding workstation includes: a support, an operating table, a clamping plate, a clamping assembly, a first transmission assembly, a second transmission assembly, and a control mechanism.

[0008] A rotating disk is rotatably mounted on the support, and a pair of horizontal arms are fixed to one side of the rotating disk. A pair of rotating heads are fixed to the bottom of the operating table, and the pair of rotating heads rotate at the outer ends of the pair of horizontal arms. A clamping disk rotates inside the operating table, and multiple threaded holes are drilled at equal intervals on it. A clamping assembly is threaded into one of the threaded holes and is used to clamp the workpiece onto the clamping disk. The first transmission assembly and the second transmission assembly are respectively mounted on the support and the rotating disk, and are used to drive the rotating disk and the rotating heads to rotate, respectively.

[0009] The control mechanism is installed between a pair of rotating heads. The control mechanism includes: a third drive shaft, a rotating shaft, a rotating sleeve, an arc-shaped slide groove, and a reset assembly. The third drive shaft rotates on a rotating disk, and a first hemispherical gear is fixed between the pair of rotating heads. The rotating shaft is fixed to the bottom of the clamping disk, and a second hemispherical gear is slidably arranged at its bottom end. The rotating shaft and the second hemispherical gear are provided with meshing sector-shaped teeth. A rotating ring is fixed to the bottom end of the second hemispherical gear. The rotating sleeve rotates on the rotating ring, and a pair of control rods are fixed on both sides of it. A pair of arc-shaped slide grooves are respectively fixed to the inner sidewalls of a pair of horizontal arms. The outer ends of the pair of control rods slide within the pair of arc-shaped slide grooves. The reset assembly is installed on both sides of the second hemispherical gear and is used to reset the rotating sleeve.

[0010] In one embodiment of this utility model, the clamping assembly includes a bolt, a clamping rod, and a clamping ring. The bolt is threaded into one of the threaded holes. The clamping rod rotates and slides on the bolt. The clamping ring is fixed to the bolt and is located at the top of the clamping rod. When the workpiece is clamped on the clamping disc, by tightening the bolt thread into the threaded hole, the bolt rotates and moves downward, while the clamping ring drives the clamping rod to move downward, causing the clamping rod to press against the workpiece, thereby completing the clamping of the workpiece.

[0011] In one embodiment of this utility model, a control head is fixed to the top of the bolt, and the control head is used to drive the bolt to rotate.

[0012] In one embodiment of this utility model, the first transmission component includes a spur gear and a first transmission shaft. The spur gear is fixed to the outer wall of the rotating disk within the support. The first transmission shaft rotates on the support, and a spur gear is fixed within the support, the spur gear meshing with the spur gear. In use, the first transmission shaft requires an external drive motor to drive the spur gear to rotate, and the spur gear drives the rotating disk to rotate via the spur gear.

[0013] In one embodiment of this utility model, the second transmission assembly includes: a second transmission shaft, a pair of chain teeth, and a chain. The second transmission shaft is fixed to the side of the rotating disk away from the operating table, and a bearing seat is rotatably mounted on it. The pair of chain teeth are respectively fixed to the rotating head and the bearing seat. The chain is mounted on the pair of chain teeth. One end of the second transmission shaft needs to be connected to an external drive motor. When the second transmission shaft rotates, it drives the rotating head to rotate through the pair of chain teeth and the chain, causing the rotating head to drive the operating table to rotate. The bearing seat is used to mount the second transmission shaft and the drive motor.

[0014] In one embodiment of this utility model, the arcuate axis of the arcuate groove is the same as the spherical axis of the first hemispherical gear perpendicular to the horizontal arm. When the operating table drives the second hemispherical gear to rotate, the two ends of the pair of control levers also slide in the arcuate groove. By making the arcuate axis of the arcuate groove the same as the spherical axis of the first hemispherical gear perpendicular to the horizontal arm, the pair of control levers, when sliding in the pair of arcuate grooves, always push the second hemispherical gear and the first hemispherical gear to fit together, so that the second hemispherical gear and the first hemispherical gear always remain in a meshing state.

[0015] In one embodiment of this utility model, the reset assembly includes: a pair of slide rods, a pair of connecting arms, and a pair of springs. The pair of slide rods are fixed to the bottom of the operating table and located on both sides of the second hemispherical gear. A fixing head is fixed to the bottom end of each pair of slide rods. The pair of connecting arms are respectively fixed to both sides of the rotating sleeve, and the outer ends of the connecting arms slide on the pair of slide rods. The pair of springs are respectively located between the pair of fixing heads and the pair of connecting arms, and are respectively sleeved on the pair of slide rods. When the operating table rotates upwards, the operating table drives the second hemispherical gear to rotate. The two sides of the pair of control rods slide from the bottom to the top of the arc-shaped groove, causing the operating table to drive the second hemispherical gear to move closer to the operating table via the rotating sleeve and rotating ring. During the process of the second hemispherical gear moving closer to the operating table, the elastic force of the pair of springs pushes the connecting arms to move towards the second hemispherical gear, thereby causing the connecting arms to drive the rotating ring and the second hemispherical gear to move towards the operating table via the rotating sleeve, thus assisting the second hemispherical gear in moving towards the operating table.

[0016] In one embodiment of this utility model, the sector-shaped teeth are fan-shaped with the axis of the third transmission shaft or rotating ring as the center, and the center of the top end is provided with an inwardly concave arc angle. This causes the outer diameter of the sector-shaped teeth to gradually decrease from the bottom end to the top end, thereby causing the second hemispherical gear to rotate on the first hemispherical gear. All the sector-shaped teeth on the first hemispherical gear can mesh with each other, ensuring that the first hemispherical gear can always drive the second hemispherical gear to rotate.

[0017] In one embodiment of this invention, each end of the pair of control levers that slides within a pair of arc-shaped grooves is equipped with a pulley. The pulleys reduce the frictional force on the control levers as they slide within the arc-shaped grooves.

[0018] In one embodiment of this utility model, a pair of limiting grooves are carved on the rotating shaft, and a pair of limiting sliders adapted to the limiting grooves are fixed on the inner wall of the second hemispherical gear. By the limiting sliders sliding in the limiting grooves, the second hemispherical gear can always drive the rotating shaft to rotate after sliding up and down on the rotating shaft.

[0019] Compared with the prior art, the positioner for a welding workstation of this utility model, through relevant structural design, can realize multi-angle displacement adjustment according to welding needs, effectively improving the practicality of the positioner. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a positioner for a welding workstation according to one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the L-shaped support and the rotating disk in one embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of the L-shaped support and the rotating disk in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the control mechanism and operating console in one embodiment of the present invention;

[0025] Figure 5 for Figure 4 The structural diagram shown at point A in the middle;

[0026] Figure 6 This is a schematic diagram of the clamping assembly in one embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the first hemispherical gear and the second hemispherical gear in one embodiment of the present invention;

[0028] Figure 8 This is a structural schematic diagram of the first hemispherical gear and the second hemispherical gear in another state according to one embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the second hemispherical gear in one embodiment of the present invention.

[0030] Explanation of key figure labels:

[0031] 1-Support, 101-Rotating disk, 102-Horizontal arm, 103-Rotating head, 104-Operating table, 105-Clamping disk, 106-Threaded hole, 107-Clamping assembly, 108-Bolt, 109-Pressure rod, 110-Pressure ring, 111-Control head, 112-Spur gear, 113-First drive shaft, 114-Spur gear, 115-Chain tooth, 116-Second drive shaft, 117-Shaft seat, 118- Chain, 2-Control mechanism, 201-Third drive shaft, 202-First hemispherical gear, 203-Rotating shaft, 204-Second hemispherical gear, 205-Limiting groove, 206-Limiting slider, 207-Rotating ring, 208-Rotating sleeve, 209-Control lever, 210-Pulley, 211-Arc-shaped groove, 212-Slide rod, 213-Connecting arm, 214-Fixed head, 215-Spring, 216-Sector teeth. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0033] like Figures 1 to 8 As shown, a positioner for a welding workstation according to one embodiment of the present invention includes: a support 1, an operating table 104, a clamping plate 105, a clamping assembly 107, a first transmission assembly, a second transmission assembly, and a control mechanism 2.

[0034] like Figures 1 to 8 As shown, a rotating disk 101 is rotatably mounted on the support 1, and a pair of horizontal arms 102 are fixed to one side of the rotating disk 101. A pair of rotating heads 103 are fixed to the bottom of the operating table 104, and the rotating heads 103 rotate at the outer ends of the pair of horizontal arms 102. A clamping disk 105 rotates inside the operating table 104, and has multiple threaded holes 106 drilled at equal intervals on it. A clamping assembly 107 is threadedly connected to one of the threaded holes 106 and is used to clamp the workpiece onto the clamping disk 105. A first transmission assembly and a second transmission assembly are respectively mounted on the support 1 and the rotating disk 101, and are used to drive the rotating disk 101 and the rotating head 103 to rotate, respectively.

[0035] like Figures 1 to 8As shown, the control mechanism 2 is installed between a pair of rotating heads 103. The control mechanism 2 includes: a third drive shaft 201, a rotating shaft 203, a rotating sleeve 208, an arc-shaped slide groove 211, and a reset assembly. The third drive shaft 201 rotates on the rotating disk 101, and a first hemispherical gear 202 is fixed between the pair of rotating heads 103. The rotating shaft 203 is fixed to the bottom of the clamping disk 105, and a second hemispherical gear 204 is slidably disposed at its bottom end. The rotating shaft 203 and the second hemispherical gear 204 are connected. The second hemispherical gear 204 is provided with meshing sector teeth 216. A rotating ring 207 is fixed at the bottom end of the second hemispherical gear 204. The rotating sleeve 208 rotates on the rotating ring 207, and a pair of control rods 209 are fixed on both sides of it. A pair of arc-shaped slide grooves 211 are respectively fixed on the inner side wall of a pair of horizontal arms 102. The outer ends of the pair of control rods 209 slide in the pair of arc-shaped slide grooves 211. The reset assembly is installed on both sides of the second hemispherical gear 204 to reset the rotating sleeve 208.

[0036] When using this device, the workpiece to be welded is placed on the clamping plate 105 and tightened into the threaded hole 106 by the clamping assembly 107, thus clamping the workpiece onto the clamping plate 105. Subsequently, when the angle of the operating table 104 needs to be adjusted, the first transmission assembly can drive the rotating disk 101 to rotate, causing the rotating disk 101 to drive the operating table 104 to rotate with a first degree of freedom via the cross arm 102. Alternatively, the second transmission assembly can drive the rotating head 103 to rotate, causing the rotating head 103 to drive the operating table 104 to rotate with a second degree of freedom.

[0037] When welding circumferential welds, requiring the clamping disc 105 to rotate the workpiece, the third drive shaft 201 drives the first hemispherical gear 202 to rotate. The third drive shaft 201 requires an external drive motor, model 86BYG350BL. The third drive shaft 201 then drives the second hemispherical gear 204 to rotate via the first hemispherical gear 202. The second hemispherical gear 204, in turn, drives the limiting slide 205 to rotate via the rotating shaft 203. Furthermore, when the rotating head 103 drives the operating table 104 to rotate downwards from a horizontal position, the distance between the first hemisphere gear 202 and the second hemisphere gear 204 gradually increases as the operating table 104 drives the second hemisphere gear 204 to rotate. Therefore, during the rotation of the operating table 104, the second hemisphere gear 204 is driven to rotate together through the rotating shaft 203. At the same time, the second hemisphere gear 204 drives the two ends of the control rod 209 to slide in the arc-shaped slide groove 211 through the rotating ring 207 and the rotating sleeve 208. During the sliding of the control rod 209 in the arc-shaped slide groove 211, the second hemisphere gear 204 is also pulled to move in the opposite direction of the operating table 104 through the rotating sleeve 208 and the rotating ring 207, so that the second hemisphere gear 204 is always in contact with the first hemisphere gear 202.

[0038] like Figures 1 to 8 As shown, the clamping assembly 107 includes a bolt 108, a clamping rod 109, and a clamping ring 110. The bolt 108 is threaded into one of the threaded holes 106. The clamping rod 109 rotates and slides on the bolt 108. The clamping ring 110 is fixed to the bolt 108 and is located on top of the clamping rod 109. When the workpiece is clamped on the clamping disc 105, by tightening the bolt 108 into the threaded hole 106, the bolt 108 rotates and moves downwards, while the clamping ring 110 drives the clamping rod 109 downwards, causing the clamping rod 109 to press against the workpiece, thereby completing the clamping of the workpiece. A control head 111 is fixed to the top of the bolt 108, and the control head 111 is used to drive the bolt 108 to rotate.

[0039] like Figures 1 to 8 As shown, the first transmission assembly includes a spur gear 112 and a first transmission shaft 113. The spur gear 112 is fixed to the outer wall of the rotating disk 101 within the support 1. The first transmission shaft 113 rotates on the support 1, and a spur gear 114 is fixed within the support 1, meshing with the spur gear 112. In use, the first transmission shaft 113 requires an external drive motor, model 86BYG350BL. The first transmission shaft 113 drives the spur gear 114 to rotate, and the spur gear 114 drives the rotating disk 101 to rotate via the spur gear 112.

[0040] like Figures 1 to 8 As shown, the second transmission assembly includes a second transmission shaft 116, a pair of chain teeth 115, and a chain 118. The second transmission shaft 116 is fixed to the side of the rotating disk 101 away from the operating table 104, and a bearing seat 117 is rotatably mounted on it. The pair of chain teeth 115 are respectively fixed to the rotating head 103 and the bearing seat 117. The chain 118 is mounted on the pair of chain teeth 115. One end of the second transmission shaft 116 requires an external drive motor, model 86BYG350BL. When the second transmission shaft 116 rotates, it drives the rotating head 103 to rotate through the pair of chain teeth 115 and the chain 118, causing the rotating head 103 to drive the operating table 104 to rotate. The bearing seat 117 is used to mount the second transmission shaft 116 and the drive motor.

[0041] like Figures 1 to 8As shown, the arc axis of the arc-shaped slide groove 211 is the same as the spherical axis of the first hemispherical gear 202 perpendicular to the horizontal arm 102. When the operating table 104 drives the second hemispherical gear 204 to rotate, the two ends of the pair of control levers 209 also slide in the arc-shaped slide groove 211. By making the arc axis of the arc-shaped slide groove 211 the same as the spherical axis of the first hemispherical gear 202 perpendicular to the horizontal arm 102, the pair of control levers 209 always push the second hemispherical gear 204 and the first hemispherical gear 202 to fit together when sliding in the pair of arc-shaped slide grooves 211, so that the second hemispherical gear 204 and the first hemispherical gear 202 are always in a meshing state.

[0042] like Figures 1 to 8 As shown, the reset assembly includes: a pair of slide rods 212, a pair of connecting arms 213, and a pair of springs 215. The pair of slide rods 212 are both fixed to the bottom of the operating table 104 and located on both sides of the second hemispherical gear 204. A fixing head 214 is fixed to the bottom end of each slide rod 212. The pair of connecting arms 213 are respectively fixed to both sides of the rotating sleeve 208, and the outer ends of the pair of connecting arms 213 slide on the pair of slide rods 212. The pair of springs 215 are respectively located between the pair of fixing heads 214 and the pair of connecting arms 213, and are respectively sleeved on the pair of slide rods 212. When the operating platform 104 rotates upward, it drives the second hemispherical gear 204 to rotate. A pair of control levers 209 slide from the bottom to the top of the arc-shaped groove 211 on both sides, causing the operating platform 104 to drive the second hemispherical gear 204 to rotate. The control levers 209, through the rotating sleeve 208 and rotating ring 207, drive the second hemispherical gear 204 closer to the operating platform 104. During this process, the connecting arm 213 moves towards the second hemispherical gear 204 due to the elastic force of a pair of springs 215. This, in turn, causes the connecting arm 213, through the rotating sleeve 208, to drive the rotating ring 207 and the second hemispherical gear 204 towards the operating platform 104, thus assisting the second hemispherical gear 204 in moving towards the operating platform 104.

[0043] like Figures 1 to 8 As shown, the sector teeth 216 are sector-shaped with the axis of the third transmission shaft 201 or the rotating ring 207 as the axis, and have an inwardly concave arc at the center of their top. This causes the outer diameter of the sector teeth 216 to gradually decrease from the bottom to the top, thus allowing the second hemispherical gear 204 to rotate on the first hemispherical gear 202. All the sector teeth 216 on the first hemispherical gear 204 can mesh with each other, ensuring that the first hemispherical gear 202 always drives the second hemispherical gear 204 to rotate. When the second hemispherical gear 204 rotates from a horizontal angle to a vertical angle, the meshing state between the first hemispherical gear 202 and the second hemispherical gear 204 changes from... Figure 7 The state changes shown are as follows Figure 8As shown in the diagram, during the transition process, the number of sector teeth 216 that can mesh with each other on the first hemispherical gear 202 and the second hemispherical gear 204 gradually increases until all sector teeth 216 mesh with each other.

[0044] like Figures 1 to 8 As shown, each end of a pair of control levers 209 that slides within a pair of arc-shaped grooves 211 is equipped with a pulley 210. The pulleys 210 reduce the friction of the control levers 209 sliding within the arc-shaped grooves 211. A pair of limiting grooves 205 are carved into the rotating shaft 203, and a pair of limiting sliders 206 adapted to the limiting grooves 205 are fixed on the inner wall of the second hemispherical gear 204. By having the limiting sliders 206 slide within the limiting grooves 205, the second hemispherical gear 204 can always drive the rotating shaft 203 to rotate after sliding up and down on the rotating shaft 203.

[0045] Working principle: When using this device, the workpiece to be welded is placed on the clamping plate 105, and the bolt 108 is tightened into the threaded hole 106. As the bolt 108 rotates and moves downward, it drives the clamping rod 109 downward through the pressure ring 110, thus clamping the workpiece. Subsequently, when the angle of the operating table 104 needs to be adjusted, the first transmission shaft 113 drives the spur gear 114 to rotate. The spur gear 114, through its spur teeth 112, drives the rotating disk 101 to rotate. This causes the rotating disk 101 to drive the operating table 104 to rotate with the first degree of freedom via the horizontal arm 102.

[0046] Alternatively, the second drive shaft 116 can be rotated, and the second drive shaft 116 drives the rotating head 103 to rotate via a pair of chain teeth 115 and a chain 118, thereby causing the rotating head 103 to drive the operating table 104 to rotate. The bearing 117 is used to mount the second drive shaft 116 and the drive motor, allowing the rotating head 103 to drive the operating table 104 to rotate with a second degree of freedom. When welding circumferential welds, requiring the clamping disc 105 to rotate the workpiece, the third drive shaft 201 drives the first hemispherical gear 202 to rotate, and the third drive shaft 201 drives the second hemispherical gear 204 to rotate via the first hemispherical gear 202. The second hemispherical gear 204 then drives the limiting slide 205 to rotate via the rotating shaft 203.

[0047] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioner for a welding workstation, characterized in that, include: A support, on which a rotating disk is rotatably mounted, and a pair of horizontal arms are fixed on one side of the rotating disk; The operating table has a pair of rotating heads fixed at its bottom, and the pair of rotating heads rotate at the outer ends of a pair of horizontal arms. The clamping disc rotates within the operating table, and has multiple threaded holes drilled at equal intervals on it; The clamping assembly is threadedly connected to one of the threaded holes; The first transmission assembly and the second transmission assembly are respectively mounted on the support and the rotating disk; and A control mechanism is installed between a pair of rotating heads. The control mechanism includes: a third drive shaft, a rotating shaft, a rotating sleeve, an arc-shaped slide groove, and a reset assembly. The third drive shaft rotates on a rotating disk, and a first hemispherical gear is fixed between the pair of rotating heads. The rotating shaft is fixed to the bottom of the clamping disk, and a second hemispherical gear is slidably arranged at its bottom end. The rotating shaft and the second hemispherical gear are provided with mutually meshing sector-shaped teeth. A rotating ring is fixed to the bottom end of the second hemispherical gear. The rotating sleeve rotates on the rotating ring, and a pair of control rods are fixed on both sides of it. A pair of arc-shaped slide grooves are respectively fixed to the inner sidewalls of a pair of horizontal arms. The outer ends of the pair of control rods slide within the pair of arc-shaped slide grooves. The reset assembly is installed on both sides of the second hemispherical gear.

2. The positioner for a welding workstation according to claim 1, characterized in that, The clamping assembly includes: A bolt, threadedly connected to one of the threaded holes; The clamping rod rotates and slides on the bolt; and The pressure ring is fixed to the bolt and located at the top of the clamping rod.

3. A positioner for a welding workstation according to claim 2, characterized in that, A control head is fixed to the top of the bolt.

4. A positioner for a welding workstation according to claim 1, characterized in that, The first transmission assembly includes: Straight teeth, fixed to the outer wall of the rotating disk within the support; and The first drive shaft rotates on the support, and a spur gear is fixed inside the support, wherein the spur gear meshes with the spur teeth.

5. A positioner for a welding workstation according to claim 1, characterized in that, The second transmission assembly includes: The second drive shaft is fixed on the side of the rotating disk away from the operating table, and a shaft seat is rotatably mounted on it. A pair of chain teeth, respectively fixed to the rotating head and the shaft seat; and A chain, mounted on a pair of teeth.

6. A positioner for a welding workstation according to claim 1, characterized in that, The arc axis of the arc-shaped groove is the same as the axis of the sphere of the first hemispherical gear that is perpendicular to the cross arm.

7. A positioner for a welding workstation according to claim 1, characterized in that, The reset component includes: A pair of sliding rods are fixed to the bottom of the operating table and located on both sides of the second hemispherical gear. A fixing head is fixed to the bottom end of each pair of sliding rods. A pair of connecting arms are fixed to both sides of the rotating sleeve, and the outer ends of the pair of connecting arms slide on a pair of sliding rods; and A pair of springs are respectively located between a pair of fixed heads and a pair of connecting arms, and are respectively sleeved on a pair of sliding rods.

8. A positioner for a welding workstation according to claim 1, characterized in that, The fan-shaped teeth are fan-shaped with the axis of the third transmission shaft or rotating ring as the axis, and the center of the top is provided with an inwardly concave arc angle.

9. A positioner for a welding workstation according to claim 1, characterized in that, Each of the control levers has a pulley installed at one end of its sliding position within a pair of arc-shaped grooves.

10. A positioner for a welding workstation according to claim 1, characterized in that, A pair of limiting grooves are cut into the rotating shaft, and a pair of limiting sliders that are adapted to the limiting grooves are fixed on the inner wall of the second hemispherical gear.

Images