Welding fixture for mast type elevator

Abstract

The invention discloses a welding fixture for a mast type elevator, which relates to the technical field of welding fixtures and comprises a rack, a turntable rotationally arranged on the rack, a welding frame fixedly arranged on the turntable, a locking assembly for preventing the turntable from rotating, and an adjusting frame arranged on the welding frame in a sliding manner, the driving assembly is used for driving the adjusting frame to slide; a first supporting table used for supporting a workpiece to be machined is arranged on the welding frame, and a second supporting table used for supporting the workpiece to be machined is arranged on the adjusting frame. The welding frame and the adjusting frame are jointly provided with a plurality of clamping assemblies, and the clamping assemblies are used for clamping workpieces to be welded. The welding device can meet the welding requirement of the mast type lifter and other special-shaped long pipe fittings, and the positioning precision and the clamping stability during welding are ensured.

Description

Technical Field

[0001] This application relates to the technical field of welding fixtures, and in particular to a welding fixture for a mast lift. Background Technology

[0002] As a core piece of equipment in aerial work platforms, mast-type scissor lifts play a vital role in the field of aerial work. With the increasing demand for aerial work, the market demand for mast-type scissor lifts is also growing year by year. Their main structure typically consists of a mast welded from multiple rectangular steel pipe sections. The welding quality and precision of the mast directly affect the performance and safety of the lift.

[0003] Currently, the welding operation of mast lifts commonly employs manual positioning combined with simple tooling. In this method, workers manually position the rectangular steel pipe to be welded, then use simple tooling to secure it before welding. Furthermore, with the increasing demand for aerial work platforms, large manufacturers with significant annual production capacity have begun to introduce automated welding production lines. New technologies such as hydraulic drives and pneumatic locking have also emerged in the field of welding fixtures. However, these welding fixtures still suffer from insufficient adaptability when welding irregularly shaped long pipes like mast lifts, failing to adequately meet the requirements for positioning accuracy and clamping stability. Summary of the Invention

[0004] In view of the problems existing in the prior art, this application provides a welding fixture for a mast-type elevator.

[0005] This application provides a welding fixture for a mast-type elevator, which adopts the following technical solution: A welding fixture for a mast-type lifting platform includes a frame, a turntable rotatably mounted on the frame, a welding frame fixedly mounted on the turntable, a locking assembly for preventing the turntable from rotating, an adjusting frame slidably mounted on the welding frame, and a driving assembly for driving the adjusting frame to slide. The welding frame is provided with a first support platform for supporting a workpiece to be processed, and the adjusting frame is provided with a second support platform for supporting the workpiece to be processed. Multiple sets of clamping assemblies are shared on the welding frame and the adjusting frame, each clamping assembly being used to clamp the workpiece to be welded.

[0006] Optionally, the locking assembly includes a handle rotatably mounted on the frame, a worm gear coaxially fixed on the handle, a shaft rotatably mounted on the frame, a worm wheel coaxially fixed on the shaft and meshing with the worm gear, a transmission gear coaxially fixed on the shaft, and a reduction gear fixed on the turntable and meshing with the transmission gear.

[0007] Optionally, a positioning disk is fixedly installed on the frame, the positioning disk is provided with scale marks along the circumference, and the turntable is provided with positioning marks.

[0008] Optionally, the drive assembly includes a lead screw rotatably mounted on the frame and a servo motor fixedly mounted on the frame. The output shaft of the servo motor is coaxially and fixedly connected to the lead screw, and the lead screw is threadedly engaged with the adjustment frame.

[0009] Optionally, the welding frame is also fixedly provided with a positioning seat, and a backing plate is slidably provided on the positioning seat. The backing plate is used to abut against the side wall of the workpiece, and the positioning seat is provided with an adjusting component for adjusting the position of the backing plate.

[0010] Optionally, the adjusting component includes an adjusting screw rotatably mounted on the positioning seat, the axial direction of the adjusting screw being parallel to the sliding direction of the backing plate, and the adjusting screw being threadedly engaged with the backing plate.

[0011] Optionally, the clamping assembly includes a first jaw slidably disposed on a welding frame, a second jaw slidably disposed on an adjusting frame, a first driving member for driving the first jaw to slide, and a second driving member for driving the second jaw to slide. The first jaw and the second jaw are disposed opposite to each other and are respectively used to abut against the two ends of the workpiece to be processed.

[0012] Optionally, a plurality of first buffer plates are slidably disposed on the top of the first support platform along the vertical direction. Each first buffer plate corresponds to a first clamp and is disposed below the corresponding first clamp. A first elastic element is disposed on the first support platform to drive each first buffer plate to slide away from the first support platform. A plurality of second buffer plates are slidably disposed on the top of the second support platform along the vertical direction. Each second buffer plate corresponds to a second clamp and is disposed below the corresponding second clamp. A second elastic element is disposed on the second support platform to drive each second buffer plate to slide away from the second support platform.

[0013] Optionally, a plurality of first support blocks are slidably disposed on the first support platform along the direction perpendicular to the first support platform. Each first support block corresponds to a first buffer plate and is disposed below the corresponding first buffer plate to support the first buffer plate. Each first support platform is provided with a first limiting member to prevent each first support block from sliding. A plurality of second support blocks are slidably disposed on the second support platform along the direction perpendicular to the second support platform. Each second support block corresponds to a second buffer plate and is disposed below the corresponding second buffer plate to support the second buffer plate. Each second support platform is provided with a second limiting member to prevent each second support block from sliding.

[0014] Optionally, multiple ball bearings are rotatably provided at the top of both the first and second buffer plates, and side baffles are fixedly provided on both sides of both the first and second buffer plates.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. This application allows the turntable to rotate on the frame, driving the welding frame to rotate, facilitating the adjustment of the welding angle of the workpiece to be processed. The locking component prevents the turntable from rotating, ensuring the welding angle is fixed. The adjusting frame can slide on the welding frame, facilitating the adjustment of its position according to the workpiece size. The first support platform and the second support platform can support the workpiece to be processed, and multiple sets of clamping components are used to clamp the workpiece to be welded, thereby adapting to the welding requirements of irregular long pipes such as mast-type lifting machines, ensuring positioning accuracy and clamping stability during welding.

[0016] 2. By using the sliding back plate on the positioning seat to abut against the side wall of the workpiece, and adjusting the position of the back plate with the adjusting parts, the workpiece can be positioned better, which can improve the positioning accuracy of the workpiece during the welding process.

[0017] 3. By setting the first buffer plate and the second buffer plate, this application can play a buffering role when the workpiece is placed on the first support platform and the second support platform, avoid rigid contact that could cause damage to the workpiece surface, and better adapt to the support needs of irregular workpieces, thereby improving the versatility and adaptability of the fixture.

[0018] 4. Multiple ball bearings rotatably mounted on the top of the first and second buffer plates reduce friction with the workpiece, facilitating workpiece placement and position adjustment. Side baffles fixed on both sides prevent workpiece slippage and improve workpiece placement stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional view of the frame used in the embodiments of this application; Figure 3 This is a schematic diagram illustrating the structure of the locking assembly according to an embodiment of this application; Figure 4 This is a cross-sectional view of the positioning seat used in the embodiments of this application; Figure 5 This is a front view of the welding frame structure used in the embodiments of this application, mainly used to express the specific structure of the clamping assembly; Figure 6 yes Figure 5 Sectional view of AA; Figure 7 yes Figure 5 A cross-sectional view of BB.

[0020] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Turntable; 12. Welding frame; 13. Adjusting frame; 14. First support platform; 141. First buffer plate; 142. First elastic element; 143. First support block; 144. First screw; 15. Second support platform; 151. Second buffer plate; 152. Second elastic element; 153. Second support block; 154. Second screw; 16. Positioning plate; 17. Positioning seat; 171. Backing plate; 172. Adjusting screw; 18. Ball bearing; 19. Side baffle; 2. Locking assembly; 21. Rotary handle; 22. Worm gear; 23. Rotating shaft; 24. Worm wheel; 25. Transmission gear; 26. Reduction gear; 3. Drive assembly; 31. Lead screw; 32. Servo motor; 4. Clamping assembly; 41. First gripper; 42. Second gripper; 43. First driving component; 44. Second driving component. Detailed Implementation

[0021] The following will be combined with the appendix Figure 1 - Appendix Figure 7 The technical solutions in the embodiments of the present invention are clearly and completely described herein. The described embodiments are only possible technical implementations of the present invention and not all possible implementations. Those skilled in the art can obtain other embodiments in conjunction with the embodiments of the present invention without creative effort, and these embodiments are also within the protection scope of the present invention.

[0022] The inventors of this application have discovered that in the welding operations of mast lifts, the industry generally uses manual positioning with simple tooling. Furthermore, with the increasing market demand for aerial work platforms, large manufacturers with significant annual production capacity have begun to introduce automated welding production lines. However, these welding fixtures still have insufficient adaptability when welding irregularly shaped long tubular components like mast lifts, failing to adequately meet the requirements for positioning accuracy and clamping stability. Therefore, this application discloses a welding fixture for mast lifts, mainly employing the following solution: This application discloses a welding fixture for a mast-type elevator. (Refer to...) Figure 1The system includes a frame 1, a turntable 11, a welding frame 12, a locking assembly 2, an adjusting frame 13, a drive assembly 3, a first support platform 14, a second support platform 15, and multiple clamping assemblies 4. The turntable 11 is horizontally rotatable on the frame 1, and the welding frame 12 is fixedly mounted on the turntable 11. Rotation of the turntable 11 drives the welding frame 12 to rotate, facilitating adjustment of the welding angle of the workpiece. The adjusting frame 13 is horizontally slidable on the welding frame 12, and the drive assembly 3 drives the adjusting frame 13 to slide, allowing adjustment and fixation of the adjusting frame 13 according to the workpiece size. The first support platform 14 is mounted on the welding frame 12, and the second support platform 15 is mounted on the adjusting frame 13, both supporting the workpiece. Multiple clamping assemblies 4 are respectively mounted on the welding frame 12 and the adjusting frame 13, used to clamp the workpiece to be welded, achieving the desired welding requirements for irregularly shaped long pipes on a mast-type lifting platform, ensuring positioning accuracy and clamping stability during welding.

[0023] Reference Figure 2 and Figure 3 Specifically, the locking assembly 2 includes a handle 21, a worm gear 22, a shaft 23, a worm wheel 24, a transmission gear 25, and a reduction gear 26. The handle 21 is rotatably mounted on the frame 1, allowing manual operation by the operator. The worm gear 22 is coaxially fixed to the handle 21; rotating the handle 21 causes the worm gear 22 to rotate as well. The shaft 23 is rotatably mounted on the frame 1, and the worm wheel 24 is coaxially fixed to the shaft 23 and meshes with the worm gear 22. Rotation of the worm gear 22 drives the worm wheel 24, thus rotating the shaft 23. The transmission gear 25 is coaxially fixed to the shaft 23, and the reduction gear 26 is fixed to the turntable 11 and meshes with the transmission gear 25. Rotation of the shaft 23 drives the transmission gear 25, which in turn drives the reduction gear 26, ultimately achieving the rotation and locking of the turntable 11. The handle 21 can be made of metal for strength and durability, or of high-strength plastic for lighter weight and lower cost. The transmission of worm 22 and worm wheel 24 is self-locking, ensuring the stability of its position when the turntable 11 is not required to rotate. This transmission structure, composed of multiple components, can achieve relatively precise angle adjustment and locking through the cooperation of gears, worm wheel 24, and worm 22.

[0024] Reference Figure 3 A positioning disk 16 is fixedly mounted on the frame 1. The central axis of the positioning disk 16 is coaxial with the rotation axis of the turntable 11. The positioning disk 16 has circumferential scale markings, and the turntable 11 has positioning marks. The positioning disk 16 can be made of stainless steel, which is rust-resistant and has a smooth surface, facilitating clear display of the scale markings. The scale markings can be made using laser engraving, resulting in high precision and durability. The positioning marks are pointer-shaped indicators. Through the combination of the positioning marks and the scale markings, operators can intuitively understand the rotation angle of the turntable 11, improving the accuracy of angle adjustment.

[0025] Reference Figure 1 The drive assembly 3 includes a lead screw 31 and a servo motor 32. The lead screw 31 is rotatably mounted on the frame 1, and its axial direction is parallel to the sliding direction of the adjusting frame 13. The servo motor 32 is fixedly mounted on the frame 1, and its output shaft is coaxially and fixedly connected to the lead screw 31, with the lead screw 31 threadedly engaged with the adjusting frame 13. When the servo motor 32 starts, its output shaft drives the lead screw 31 to rotate. Due to the threaded engagement between the lead screw 31 and the adjusting frame 13, the adjusting frame 13 slides under the rotation of the lead screw 31. The servo motor 32 can precisely control the rotation angle and speed, thereby precisely controlling the sliding position of the adjusting frame 13.

[0026] Reference Figure 1 and Figure 4 A positioning seat 17 is also fixedly installed on the welding frame 12. A backing plate 171 is slidably mounted on the positioning seat 17. The backing plate 171 is used to abut against the side wall of the workpiece. The positioning seat 17 is provided with an adjusting component for adjusting the position of the backing plate 171. The adjusting component includes an adjusting screw 172, which is rotatably mounted on the positioning seat 17. The axis of the adjusting screw 172 is parallel to the sliding direction of the backing plate 171, and the adjusting screw 172 is threadedly engaged with the backing plate 171. When the adjusting screw 172 is rotated, the backing plate 171 will slide under the action of the adjusting screw 172, thereby better positioning the workpiece and improving the positioning accuracy of the workpiece during the welding process.

[0027] Reference Figure 5 Each clamping assembly 4 includes a first gripper 41, a second gripper 42, a first drive member 43, and a second drive member 44. The first gripper 41 is slidably mounted on the welding frame 12 along its length, and the second gripper 42 is slidably mounted on the adjusting frame 13 along its length. The first gripper 41 and the second gripper 42 are positioned opposite each other and are used to abut the two ends of the workpiece to be processed. The first drive member 43 drives the first gripper 41 to slide, and the second drive member 44 drives the second gripper 42 to slide. The first drive member 43 and the second drive member 44 can be cylinders, which have the characteristics of fast response speed and large driving force, or they can be electric push rods, which can more accurately control the movement distance of the grippers. The first gripper 41 and the second gripper 42 can be made of metal, and the first gripper 41 and the second gripper 42 can be customized according to actual needs to ensure that the first gripper 41 and the second gripper 42 can better fit the surface of the workpiece and improve the firmness of the workpiece clamping.

[0028] Reference Figure 6Multiple first buffer plates 141 are slidably mounted vertically on the top of the first support platform 14. Each first buffer plate 141 corresponds to a first gripper 41 and is positioned below the corresponding gripper 41. The first support platform 14 is equipped with a first elastic element 142 for driving each first buffer plate 141 to slide away from the first support platform 14. The first elastic element 142 can be a spring. When a workpiece is placed on the first buffer plate 141, the spring is compressed, providing a cushioning effect and preventing rigid contact that could damage the workpiece surface. The first buffer plates 141 can be made of plastic, which is lightweight and has a certain degree of elasticity.

[0029] Reference Figure 7 Multiple second buffer plates 151 are slidably mounted vertically on the top of the second support platform 15. Each second buffer plate 151 corresponds to a second gripper 42 and is positioned below the corresponding second gripper 42. The second support platform 15 is equipped with a second elastic element 152 for driving each second buffer plate 151 to slide away from the second support platform 15. The second elastic element 152 can also be a spring, functioning similarly to the first elastic element 142. The second buffer plates 151 can also be made of plastic.

[0030] Reference Figure 6 A plurality of first support blocks 143 are slidably disposed on the first support platform 14 along a direction perpendicular to the first support platform 14. Each first support block 143 corresponds to a first buffer plate 141 and is disposed below the corresponding first buffer plate 141 to support the first buffer plate 141. The first support platform 14 is provided with a first limiting member to prevent each first support block 143 from sliding. The first limiting member includes a first screw 144, which is rotatably disposed on the first support platform 14 and is threadedly engaged with the first support block 143. The position of the first support block 143 can be adjusted by rotating the first screw 144.

[0031] Reference Figure 7 Multiple second support blocks 153 are slidably disposed on the second support platform 15 along a direction perpendicular to the second support platform 15. Each second support block 153 corresponds to a second buffer plate 151 and is disposed below the corresponding second buffer plate 151 to support it. The second support platform 15 is provided with second limiting members to prevent the sliding of each second support block 153. The second limiting member includes a second screw 154, which is rotatably disposed on the second support platform 15 and threadedly engaged with the second support block 153. Rotating the second screw 154 adjusts the position of the second support block 153. The first support block 143 and the second support block 153 support the first buffer plate 141 and the second buffer plate 151 respectively, ensuring that the first buffer plate 141 and the second buffer plate 151 stably support the workpiece.

[0032] Reference Figure 6 and Figure 7 The top of both the first buffer plate 141 and the second buffer plate 151 is rotatably equipped with multiple ball bearings 18, and side baffles 19 are fixedly installed on both sides of the first buffer plate 141 and the second buffer plate 151. The ball bearings 18 can be made of stainless steel, with a smooth surface, flexible rotation, which can reduce friction with the workpiece and facilitate the placement and adjustment of the workpiece. The side baffles 19 can be made of plastic, which can prevent the workpiece from slipping and improve the stability of the workpiece placement.

[0033] The implementation principle of a welding fixture for a mast-type lifting platform according to an embodiment of this application is as follows: A rotating disc on the frame 1 drives the welding frame 12 to rotate, facilitating adjustment of the welding angle of the workpiece. An adjusting frame 13 slides on the welding frame 12, allowing for position adjustment based on workpiece dimensions. A first support platform 14 and a second support platform 15 support the workpiece, and multiple clamping components 4 can clamp the workpiece to be welded. Through the coordinated operation of its components, this welding fixture achieves high-precision positioning and stable clamping for welding irregularly shaped long pipes such as mast-type lifting platforms. Compared to existing technologies, it better adapts to the welding requirements of mast-type lifting platforms, improving welding quality and efficiency.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding fixture for a mast-type elevator, characterized in that, include: Rack (1), Rotate the turntable (11) mounted on the frame (1). A welding frame (12) is fixedly mounted on the turntable (11). Locking assembly (2) for preventing the turntable (11) from rotating, An adjusting bracket (13) is slidably mounted on the welding frame (12). Drive assembly (3) for driving the adjustment frame (13) to slide; The welding frame (12) is provided with a first support platform (14) for supporting the workpiece to be processed, and the adjustment frame (13) is provided with a second support platform (15) for supporting the workpiece to be processed; The welding frame (12) and the adjustment frame (13) are provided with multiple sets of clamping components (4), each of which is used to clamp the workpiece to be welded.

2. The welding fixture for a mast-type elevator according to claim 1, characterized in that: The locking assembly (2) includes a handle (21) rotatably mounted on the frame (1), a worm (22) coaxially fixed on the handle (21), a shaft (23) rotatably mounted on the frame (1), a worm wheel (24) coaxially fixed on the shaft (23) and meshing with the worm (22), a transmission gear (25) coaxially fixed on the shaft (23), and a reduction gear (26) fixed on the turntable (11) and meshing with the transmission gear (25).

3. A welding fixture for a mast-type elevator according to claim 1, characterized in that: A positioning disk (16) is fixedly installed on the frame (1), and a scale mark is provided on the positioning disk (16) along the circumferential direction. A positioning mark is provided on the turntable (11).

4. A welding fixture for a mast-type elevator according to claim 1, characterized in that: The drive assembly (3) includes a lead screw (31) rotatably mounted on the frame (1) and a servo motor (32) fixedly mounted on the frame (1). The output shaft of the servo motor (32) is coaxially and fixedly connected to the lead screw (31), and the lead screw (31) is threadedly engaged with the adjustment frame (13).

5. A welding fixture for a mast-type elevator according to claim 1, characterized in that: The welding frame (12) is also fixedly provided with a positioning seat (17), and a backing plate (171) is slidably provided on the positioning seat (17). The backing plate (171) is used to abut against the side wall of the workpiece. The positioning seat (17) is provided with an adjusting component for adjusting the position of the backing plate (171).

6. A welding fixture for a mast-type elevator according to claim 5, characterized in that: The adjusting component includes an adjusting screw (172) rotatably mounted on the positioning seat (17), the axial direction of the adjusting screw (172) being parallel to the sliding direction of the backing plate (171), and the adjusting screw (172) being threadedly engaged with the backing plate (171).

7. A welding fixture for a mast-type elevator according to claim 1, characterized in that: The clamping assembly (4) includes a first clamp (41) slidably disposed on the welding frame (12), a second clamp (42) slidably disposed on the adjusting frame (13), a first driving member (43) for driving the first clamp (41) to slide, and a second driving member (44) for driving the second clamp (42) to slide. The first clamp (41) and the second clamp (42) are arranged opposite to each other and are respectively used to abut against the two ends of the workpiece to be processed.

8. A welding fixture for a mast-type elevator according to claim 7, characterized in that: The top of the first support platform (14) is slidably provided with a plurality of first buffer plates (141) in the vertical direction. The first buffer plates (141) correspond one-to-one with the first grippers (41) and are respectively provided below the corresponding first grippers (41). The first support platform (14) is provided with a first elastic element (142) for driving each first buffer plate (141) to slide away from the first support platform (14). The top of the second support platform (15) is slidably provided with a plurality of second buffer plates (151) in the vertical direction. The second buffer plates (151) correspond one-to-one with the second grippers (42) and are respectively provided below the corresponding second grippers (42). The second support platform (15) is provided with a second elastic element (152) for driving each second buffer plate (151) to slide away from the second support platform (15).

9. A welding fixture for a mast-type elevator according to claim 8, characterized in that: Multiple first support blocks (143) are slidably arranged on the first support platform (14) along the direction perpendicular to the first support platform (14). The first support blocks (143) correspond one-to-one with the first buffer plates (141) and are respectively arranged below the corresponding first buffer plates (141) to support the first buffer plates (141). The first support platform (14) is respectively provided with first limiting members to prevent each first support block (143) from sliding. Multiple second support blocks (153) are slidably arranged on the second support platform (15) along the direction perpendicular to the second support platform (15). The second support blocks (153) correspond one-to-one with the second buffer plates (151) and are respectively arranged below the corresponding second buffer plates (151) to support the second buffer plates (151). The second support platform (15) is provided with second limiting members to prevent each second support block (153) from sliding.

10. A welding fixture for a mast-type elevator according to claim 8, characterized in that: The top of the first buffer plate (141) and the second buffer plate (151) are each rotatably provided with a plurality of balls (18), and the sides of the first buffer plate (141) and the second buffer plate (151) are each fixedly provided with side baffles (19).

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