A welding device for pot handle

By designing automated equipment for welding pot handles, the problems of unstable butt and fluctuations in welding quality in traditional welding methods are solved, and precise butt and efficient welding between pot and handles are achieved, improving welding quality and production efficiency.

CN118720494BActive Publication Date: 2025-04-18WUYI YIHONG HOUSEHOLD PROD CO LTD
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Patent Information

Application Number
CN202411015892.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-26
Publication Date
2025-04-18
Estimated Expiration
2044-07-26

AI Technical Summary

Technical Problem

The traditional handle welding method is difficult to ensure the precise alignment and stable fixation of the pot and the handle, resulting in position deviation during the welding process, affecting the uniformity and strength of the welding. The quality of manual welding fluctuates greatly, which is prone to defects, affecting the overall strength and sealing of the pot.

Method used

A welding equipment for pot handles is designed, including a base plate, main bracket, welding gun, material bucket and placement plate. The first and second feeding mechanisms are used to achieve accurate butt and automatic feeding of pot and handles, and combined with the discharge mechanism to realize automatic welding and discharge, and improve welding efficiency and quality.

Benefits of technology

Through automated butt and feeding processes, we ensure accurate butt between the pot and the handle, improve uniformity and strength of welding, reduce manual intervention, reduce welding defects, improve the overall strength and sealing of the pot, and improve production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the technical field of pot production, and in particular to a pot handle welding device, comprising a bottom plate, a main bracket, a welding gun, a material barrel and a placement plate, wherein the main bracket is fixed in the middle of the bottom plate, the welding gun is fixed on the main bracket, the material barrel is fixed at one end of the bottom plate, a placement plate is arranged in the material barrel, a reset push rod is connected to the bottom of the placement plate, and a first feeding mechanism, a second feeding mechanism and a discharging mechanism are also included. The pot to be welded is lifted by the first feeding mechanism, and the handle to be welded is fed by the second feeding mechanism, so that the pot to be welded and the handle to be welded can be accurately docked, the welding gun is used to weld the two, and the welded pot is then conveyed to the conveying platform for export by the discharging mechanism, and the material picking bracket can drive the feeding slider to move horizontally while conveying the welded pot, so as to achieve the effect of automatically grabbing the handle, and further save the operation time of each action.
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Description

Technical Field

[0001] The invention relates to the technical field of cookware production, and in particular to a welding device for a cookware handle. Background Art

[0002] In the current kitchenware manufacturing industry, the stable connection between the pot and the handle is the key to ensure the safety and durability of the product. Traditionally, the combination of these two parts is mostly achieved by first processing them separately and then combining them through welding technology. However, the commonly used method of manual welding after simple bracket docking is easy to operate, but it faces many challenges, which seriously restricts the improvement of product quality and the enhancement of market competitiveness.

[0003] Specifically, when a simple bracket is used to connect the pot and the handle, it is often difficult to ensure accurate alignment and stable fixation between the two. This instability can easily lead to positional deviation during welding, which in turn affects the uniformity and strength of welding. In addition, manual welding is greatly affected by the welder's skill level, work fatigue and environmental factors. The welding quality fluctuates greatly and is prone to defects such as weld discontinuity, pores, and slag inclusions. These will directly affect the overall strength and sealing of the pot, and may even cause safety hazards during use.

[0004] What is more serious is that due to the existence of the above problems, some cookware cannot meet the high standards of the market in terms of quality control. For example, they may face challenges in durability testing and safety standard certification, which puts the products at a disadvantage in the fierce market competition. Consumers are increasingly choosing high-quality and high-safety cookware. Therefore, cookware products made with traditional welding methods are unable to meet consumer needs.

[0005] Therefore, it is necessary to design a device that can be used to butt and weld the pot and the handle. Summary of the invention

[0006] In order to overcome the shortcoming that the traditional handle welding method in the production of cookware cannot improve the quality of the cookware, the present invention provides a cookware handle welding device.

[0007] Technical solution: A welding device for pot handles, comprising a bottom plate, a main bracket, a welding gun, a material barrel and a placement plate, the main bracket is fixed in the middle of the bottom plate, the welding gun is fixed on the main bracket, the material barrel is fixed at one end of the bottom plate, a placement plate is arranged in the material barrel, a reset push rod is connected to the bottom of the placement plate, and also comprises a first feeding mechanism, a second feeding mechanism and a discharging mechanism, the first feeding mechanism is arranged on the material barrel, the second feeding mechanism comprises a material slide rail, a feeding slider and a slotted connecting rod, the material slide rail is fixed to the main bracket, the feeding slider is slidably connected in the material slide rail, one end of the slotted connecting rod is rotatably connected to the main bracket, and the other end limits the feeding slider, and the feeding slider is fixed to the main bracket. A convex block is fixedly connected to the side of the block, and a straight groove is formed on the slotted connecting rod. The convex block slides in the straight groove within a limited position. The discharging mechanism includes a second servo motor, a material picking bracket, an electromagnetic suction cup, a transmission assembly and a conveying platform. The material picking bracket is rotatably connected to the upper end of the main bracket and is powered by the second servo motor. An electromagnetic suction cup is arranged at the end of the material picking bracket, and the conveying platform is arranged on the bottom plate. The material picking bracket fixes the pot through the electromagnetic suction cup. The second servo motor drives the material picking bracket to rotate and discharge the material. The material picking bracket drives the slotted connecting rod through the transmission assembly to push the feeding slider to pick up the material with the handle. The material picking bracket places the pot on the conveying platform and then rotates in the opposite direction. The feeding slider pushes the handle to the material barrel to dock with the pot.

[0008] As a further preferred embodiment of the present invention, the first feeding mechanism includes a first servo motor, a driving gear, a ring gear, a threaded rod, a driven gear, a rotating rod, a clamping block and a check rod. The first servo motor is fixed to the material barrel through a bracket, the output shaft of the first servo motor is connected to the driving gear, the ring gear is rotatably connected to the upper edge of the material barrel, the driving gear is meshed with the ring gear, the mounting rod is fixed to the material barrel, the threaded rod is rotatably connected to the mounting rod, a driven gear meshed with the ring gear is fixed to the bottom of the threaded rod, the rotating rod is connected to the threaded rod through threads, a clamping block is connected to the end of the rotating rod, the check rod is fixed to the mounting rod to limit the rotating rod, and the centripetal side of the clamping block is set as an arc surface.

[0009] As a further preferred solution of the present invention, the transmission assembly is composed of a transmission gear and a toothless gear that mesh with each other, the transmission gear is fixed to the rotating shaft of the material picking bracket, and the toothless gear is fixed to the rotating shaft of the slotted connecting rod.

[0010] As a further preferred solution of the present invention, the conveying platform is composed of two parallel but spaced conveyor belts, and the width of the spaced portion is greater than the width of the electromagnetic suction cup but less than the width of the pot.

[0011] As a further preferred solution of the present invention, a telescopic embedding block and a pushing block are provided in the feeding slide block, the embedding block can be embedded in the through hole of the handle, and the pushing block pushes the end of the handle.

[0012] As a further preferred embodiment of the present invention, it also includes a first fixed bracket and a limiting roller, the first fixed bracket is fixedly connected to the upper edge of the material barrel, the limiting roller is slidably connected to the upper end of the first fixed bracket through a slider, and a reset spring is connected between the slider and the first fixed bracket.

[0013] As a further preferred embodiment of the present invention, it also includes a second fixed bracket and a cleaning brush. The second fixed bracket is fixedly connected to the material barrel. The cleaning brush is rotatably connected to the second fixed bracket. When the pot moves upward, the cleaning brush can clean the surface of the pot to be welded.

[0014] As a further preferred embodiment of the present invention, a triangular slide and a limit block are also included. The triangular slide is arranged on the placement plate, the limit block is radially slidably connected in the triangular slide, and a spring is connected between the limit block and the triangular slide.

[0015] As a further preferred embodiment of the present invention, it also includes a third servo motor, a telescopic rod and a grinding disc. The third servo motor is fixed on the material picking bracket. The output shaft of the third servo motor is connected to the telescopic rod. The end of the telescopic rod is fixed with a grinding disc. The grinding disc can perform external grinding on the welding parts of the pot and the handle to eliminate welding slag.

[0016] As a further preferred embodiment of the present invention, it also includes a control rod, a return spring and a limit rod. The control rod is rotatably connected to the end of the telescopic rod, a return spring is connected between the control rod and the material picking bracket, the limit rod is fixed to the main bracket, and the limit rod can push and limit the control rod.

[0017] The beneficial effects of the present invention are as follows: the cookware to be welded is lifted by the first feeding mechanism, and the handle to be welded is fed by the second feeding mechanism, so that the cookware to be welded and the handle to be welded can be accurately connected, a welding gun is used to weld the two, and then the welded cookware is conveyed to the conveying table by the discharging mechanism for discharge. During the conveyance of the welded cookware by the picking bracket, the feeding slider can be driven to move horizontally, thereby realizing the effect of automatically grabbing the handle, further saving the operating time of each action, and making the feeding, welding and discharging processes of the cookware and the handle precisely coordinated, and the linkage effectively improves the welding efficiency of cookware production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the first feeding mechanism of the present invention.

[0020] Figure 3 For the present invention Figure 2 Detailed diagram of the three-dimensional structure of A in the middle.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the second feeding mechanism of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the feeding slider of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the limiting roller and the cleaning brush of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the limit block of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure when the control rod and the limit rod are separated from each other.

[0026] In the above figures: 1: bottom plate, 2: main bracket, 3: welding gun, 4: material barrel, 5: placement plate, 6: reset push rod, 7: first servo motor, 8: driving gear, 9: gear ring, 10: threaded rod, 1001: mounting rod, 11: driven gear, 12: rotating rod, 13: clamping block, 14: check rod, 15: material slide rail, 16: feeding slide block, 1601: embedded block, 1602: push block, 17: second servo motor , 18: material picking bracket, 19: electromagnetic suction cup, 20: transmission gear, 21: toothless gear, 22: slotted connecting rod, 23: conveying table, 24: first fixed bracket, 2401: limiting roller, 25: second fixed bracket, 2501: cleaning brush, 26: triangular slide, 2601: limiting block, 27: third servo motor, 28: telescopic rod, 29: grinding disc, 30: control rod, 31: reset spring, 32: limiting rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0028] Embodiment: A welding device for a pot handle, such as Figure 1-Figure 8As shown, it includes a bottom plate 1, a main bracket 2, a welding gun 3, a material barrel 4 and a placement plate 5. The main bracket 2 is fixed to the middle of the bottom plate 1, the welding gun 3 is fixed to the main bracket 2, the material barrel 4 is fixed to the left end of the bottom plate 1, and a placement plate 5 is arranged in the material barrel 4. The bottom of the placement plate 5 is connected with a reset push rod 6. It also includes a first feeding mechanism, a second feeding mechanism and a discharging mechanism. The first feeding mechanism includes a first servo motor 7, a driving gear 8, a gear ring 9, a threaded rod 10, a driven gear 11, a rotating rod 12, a clamping block 13 and a check rod 14. The first servo motor 7 is fixed to the material barrel 4 through a bracket. The output shaft of the first servo motor 7 is connected with the driving gear 8, a gear ring 9, a threaded rod 10, a driven gear 11, a rotating rod 12, a clamping block 13 and a check rod 14. The gear 8 and the gear ring 9 are rotatably connected to the upper edge of the material barrel 4, the driving gear 8 is meshed with the gear ring 9, three mounting rods 1001 are fixed to the material barrel 4, the threaded rod 10 is rotatably connected to the mounting rod 1001, and the bottom of the threaded rod 10 is fixed with a driven gear 11 meshed with the gear ring 9, the rotating rod 12 is connected to the threaded rod 10 by threads, and the end of the rotating rod 12 is connected with a clamping block 13, the clamping block 13 is made of hard rubber and the centripetal side is set as an arc surface, so that the clamping block 13 can fit tightly to the side of the pot, thereby improving the clamping stability of the pot, the check rod 14 is fixed to the mounting rod 1001 to limit the rotating rod 12, and the second feeder The structure includes a material slide rail 15, a feeding slider 16 and a slotted connecting rod 22. The material slide rail 15 is fixedly connected to the main bracket 2, and the feeding slider 16 is slidably connected in the material slide rail 15. One end of the slotted connecting rod 22 is rotatably connected to the main bracket 2, and the other end limits the feeding slider 16. A convex block is fixedly connected to the side of the feeding slider 16. The slotted connecting rod 22 is provided with a straight groove, and the convex block is limited and slides in the straight groove. The discharging mechanism includes a second servo motor 17, a material picking bracket 18, an electromagnetic suction cup 19, a transmission assembly and a conveying table 23. The material picking bracket 18 is rotatably connected to the upper end of the main bracket 2 and is powered by the second servo motor 17. The end of the material picking bracket 18 is provided with The electromagnetic suction cup 19 and the conveying platform 23 are arranged on the right side of the bottom plate 1. The material picking bracket 18 fixes the pot through the electromagnetic suction cup 19. The second servo motor 17 drives the material picking bracket 18 to rotate and discharge the material. The material picking bracket 18 drives the slotted connecting rod 22 through the transmission assembly to push the feeding slider 16 to handle the material picking. The transmission assembly is composed of a transmission gear 20 and a toothless gear 21 that are meshed with each other. The transmission gear 20 is fixed at the rotating shaft of the material picking bracket 18, and the toothless gear 21 is fixed at the rotating shaft of the slotted connecting rod 22. The material picking bracket 18 places the pot on the conveying platform 23 and then rotates in the opposite direction. The feeding slider 16 pushes the handle to the material barrel 4 to dock with the pot.

[0029] like Figure 1 As shown, the conveying platform 23 is composed of two parallel and spaced conveyor belts, wherein the width of the spaced portion is greater than the width of the electromagnetic chuck 19 but less than the width of the pot.

[0030] like Figure 5As shown, a telescopic embedding block 1601 and a pushing block 1602 are provided in the feeding slide block 16. The embedding block 1601 can be embedded in the through hole of the handle, and the pushing block 1602 pushes the end of the handle.

[0031] like Figure 6 and Figure 7 As shown, it also includes a first fixed bracket 24 and a limiting roller 2401. The first fixed bracket 24 is fixedly connected to the upper edge of the material barrel 4. The limiting roller 2401 is slidably connected to the upper end of the first fixed bracket 24 through a slider. A spring is connected between the slider and the first fixed bracket 24.

[0032] like Figure 6 and Figure 7 As shown, it also includes a second fixed bracket 25 and a cleaning brush 2501. The second fixed bracket 25 is fixedly connected to the material barrel 4. The cleaning brush 2501 is rotatably connected to the second fixed bracket 25. When the pot moves upward, the cleaning brush 2501 can clean the surface of the pot to be welded.

[0033] like Figure 6 and Figure 7 As shown, it also includes a triangular slide 26 and a limit block 2601. The triangular slide 26 is arranged on the placement plate 5. The limit block 2601 is radially slidably connected in the triangular slide 26. A spring is connected between the limit block 2601 and the triangular slide 26.

[0034] like Figure 8 As shown, it also includes a third servo motor 27, a telescopic rod 28 and a grinding disc 29. The third servo motor 27 is fixed on the material picking bracket 18. The output shaft of the third servo motor 27 is connected to the telescopic rod 28. The end of the telescopic rod 28 is fixed with a grinding disc 29. The grinding disc 29 can perform external grinding on the welding parts of the pot and the handle to eliminate welding slag.

[0035] like Figure 8 As shown, it also includes a control rod 30, a return spring 31 and a limit rod 32. The control rod 30 is rotatably connected to the end of the telescopic rod 28. The return spring 31 is connected between the control rod 30 and the material picking bracket 18. The limit rod 32 is fixed to the main bracket 2, and the limit rod 32 can push and limit the control rod 30.

[0036] Working principle: the pot to be welded is stacked on the placement plate 5 with the concave surface facing downwards, the limit block 2601 in the triangular slide 26 can clamp and fix the edge of the pot, the material slide 15 is used to place the handle to be welded, turn on the first servo motor 7 to drive the driving gear 8 to rotate, the driving gear 8 will drive the ring gear 9 to rotate, and then drive the three driven gears 11 to rotate synchronously, that is, the threaded rod 10 rotates synchronously, and under the action of friction, the rotating rod 12 rotates counterclockwise (from a top view) at the same time, and the clamping block 13 at the end of the rotating rod 12 will contact and clamp the pot to be welded, and as the threaded rod 10 continues to rotate, the rotating rod 12 will move upward under the action of the thread, so that the pot to be welded can be lifted, and the limit The positioning roller 2401 can limit the position of the pot to be welded, so that the pot to be welded moves upward to the central welding position, and the cleaning brush 2501 will also clean the welding part of the pot to be welded to prevent foreign matter from sticking to the welding. The second servo motor 17 is turned on to drive the material picking bracket 18 to rotate counterclockwise (main viewing angle), and the transmission gear 20 drives the slotted connecting rod 22 to rotate clockwise through the toothless gear 21. The slotted connecting rod 22 will drive the feeding slider 16 to move to the left (at this time, the feeding slider 16 has completed the grabbing of the handle to be welded), and then the pot to be welded and the handle to be welded are contacted and connected, and the welding gun 3 is turned on to weld the pot and the handle. After the welding is completed, the second servo motor 17 and the electromagnetic suction cup 1 are turned on. 9 and the third servo motor 27, the electromagnetic suction cup 19 at the end of the second servo motor 17 can magnetically fix the pot, control the first servo motor 7 to operate in the reverse direction, the clamping block 13 will contact the clamping and fixing of the pot, and the rotating rod 12 will move downward and reset under the obstruction of the check rod 14, and then the second servo motor 17 will rotate clockwise through the material picking bracket 18, and the material picking bracket 18 will take out the welded pot. At the same time, the slotted connecting rod 22 rotating counterclockwise pushes the feeding slide block 16 to move right, and the feeding slide block 16 is provided with an embedded block 1601 that can be embedded in the through hole of the handle to fix the handle. During the rotation of the material picking bracket 18, the control rod 30 disengages from the limit rod 32, and the reset spring 31 shrinks and resets , and the telescopic rod 28 will be unfolded so that the grinding disc 29 contacts the welding point between the pot and the handle, and the third servo motor 27 drives the grinding disc 29 to grind the welding point to remove excess welding slag, and the material picking bracket 18 will rotate the welded pot to the end face of the conveying table 23. At this time, the electromagnetic suction cup 19 is closed, and the welded pot will be conveyed through the conveying table 23. At this time, the second servo motor 17 is controlled to operate in the reverse direction, and the material picking bracket 18 rotates counterclockwise to reset. The limit rod 32 blocks the control rod 30 to limit the grinding disc 29 so that the grinding disc 29 is lifted above the welding height, so as to facilitate the next welding position. The feeding slider 16 will also drive the handle to be welded to move to the left, so that the handle to be welded can be accurately docked with the next lifted pot to be welded.

[0037] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A welding device for a cookware handle, comprising a bottom plate (1), a main support (2), a welding gun (3), a material barrel (4) and a placement plate (5), wherein the main support (2) is fixed to the middle of the bottom plate (1), the welding gun (3) is fixed to the main support (2), the material barrel (4) is fixed to one end of the bottom plate (1), a placement plate (5) is arranged in the material barrel (4), and a reset push rod (6) is connected to the bottom of the placement plate (5), wherein: The invention also comprises a first feeding mechanism for conveying the pot, a second feeding mechanism for conveying the handle and a discharging mechanism for discharging the welded pot handle. The first feeding mechanism is arranged on the material barrel (4), the second feeding mechanism comprises a material slide rail (15), a feeding slider (16) and a slotted connecting rod (22), the material slide rail (15) is fixedly connected to the main bracket (2), the feeding slider (16) is slidably connected in the material slide rail (15), one end of the slotted connecting rod (22) is rotatably connected to the main bracket (2), and the other end limits the feeding slider (16), and the discharging mechanism comprises a second servo motor (17) , a material taking bracket (18), an electromagnetic suction cup (19), a transmission assembly and a conveying platform (23), wherein the material taking bracket (18) is rotatably connected to the upper end of the main bracket (2) and is powered by a second servo motor (17), an electromagnetic suction cup (19) is arranged at the end of the material taking bracket (18), the conveying platform (23) is arranged on the bottom plate (1), the material taking bracket (18) fixes the pot by means of the electromagnetic suction cup (19), the second servo motor (17) drives the material taking bracket (18) to rotate and discharge the material, and the material taking bracket (18) drives the slotted connecting rod (22) through the transmission assembly to push the feeding slide block (16) to handle the material taking. The material taking bracket (18) places the pot on the conveying platform (23) and then rotates in the opposite direction, and the feeding slider (16) pushes the handle to the material barrel (4) to dock with the pot; the first feeding mechanism comprises a first servo motor (7), a threaded rod (10), a rotating rod (12) and a clamping block (13); the first servo motor (7) is fixed to the material barrel (4) through the bracket, the mounting rod (1001) is fixed to the material barrel (4), the threaded rod (10) is rotatably connected to the mounting rod (1001), the first servo motor (7) drives the threaded rod (10), and the rotating rod (12) is connected to the material barrel (4) through the threaded rod (1001). The rotating rod (12) is connected to the threaded rod (10), and the end of the rotating rod (12) is connected to a clamping block (13), and the centripetal side of the clamping block (13) is set as an arc surface; the transmission component is composed of a transmission gear (20) and a toothless gear (21) that mesh with each other, the transmission gear (20) is fixed on the rotating shaft of the material picking bracket (18), and the toothless gear (21) is fixed on the rotating shaft of the slotted connecting rod (22); a telescopic embedding block (1601) and a pushing block (1602) are arranged in the feeding slide block (16), the embedding block (1601) can be embedded in the through hole of the handle, and the pushing block (1602) pushes the end of the handle.

2. A cooking pot handle welding device according to claim 1, characterized in that: The conveying platform (23) is composed of two parallel but spaced conveyor belts, wherein the width of the spaced portion is greater than the width of the electromagnetic chuck (19) but less than the width of the pot.

3. A cooking pot handle welding device according to claim 2, characterized in that: It also includes a limiting roller (2401), which is slidably connected to the upper edge of the material barrel (4) via a slider.

4. A cooking pot handle welding device according to claim 3, characterized in that: It also includes a cleaning brush (2501), which is connected to the material barrel (4).

5. A cooking pot handle welding device according to claim 4, characterized in that: It also includes a triangular slideway (26) and a limiting block (2601), wherein the triangular slideway (26) is arranged on the placement plate (5), and the limiting block (2601) is radially slidably connected in the triangular slideway (26).

6. A cooking pot handle welding device according to claim 5, characterized in that: The invention also comprises a third servo motor (27), a telescopic rod (28) and a grinding disc (29); the third servo motor (27) is fixed on the material taking bracket (18); the output shaft of the third servo motor (27) is connected with the telescopic rod (28); the end of the telescopic rod (28) is fixed with the grinding disc (29); the grinding disc (29) can perform external grinding on the welding part of the pot and the handle.

7. A cooking pot handle welding device according to claim 6, characterized in that: It also includes a control rod (30), a return spring (31) and a limit rod (32); the control rod (30) is rotatably connected to the end of the telescopic rod (28); a return spring (31) is connected between the control rod (30) and the material taking bracket (18); the limit rod (32) is fixed to the main bracket (2); and the limit rod (32) can push and limit the control rod (30).

Citation Information

Patent Citations

  • Pan handle welding equipment

    CN107813068A

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    CN111468856A