An automatic welding tool for forklift mast axle head

Abstract

The present invention discloses an automatic assembly welding tool for a forklift gantry shaft head, comprising a base, two end face positioning devices are fixedly installed on the top of the base, a rotating device is fixedly installed on the top of the base, a clamping device is slidably installed on the top of the base, a three-axis slide is fixedly installed on the base, and an angle adjustment device is rotatably installed on the three-axis slide. The present invention is reasonably designed, can realize automatic positioning of the shaft head, automatic flipping of parts, can adjust the shaft head at multiple angles, is suitable for welding work of various models of gantry channel steel shaft heads, and is equipped with two positioning options of the inner width and outer width of the gantry channel steel, has the characteristics of high automation, accurate precision, and strong versatility, and can firmly clamp and fix the welding gun head, and can adjust the height position and horizontal position of the welding gun head, without the need for the staff to hold the welding gun head for manual welding operations, reducing the workload, saving time and effort, and improving welding efficiency and welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of forklift production, in particular to an automatic assembly welding tool for a forklift mast axle head. Background Art

[0002] A forklift is a highly efficient equipment for automated loading, unloading, stacking and handling. Nowadays, forklifts are widely used in factories, logistics parks and other fields. The forklift mast is the main load-bearing structure of the forklift picking device and is a mechanism for lifting goods. It is composed of an inner mast, an outer mast, a fork frame, a fork, a sprocket, a chain, a lifting cylinder and a tilting cylinder. In essence, the forklift mast can be abstracted into several moving pairs. The moving pairs of the forklift mast are composed of main rollers, measuring rollers, channel steels, axle heads and sliders. In the production and manufacturing process of the forklift, the forklift mast axle head needs to be welded to the mast channel steel. Whether the resistance welding positioning of the axle head is accurate will affect the lifting of the forklift during later use. When welding the forklift mast axle head, the welding operation is usually performed on a forklift mast axle head welding tooling platform.

[0003] However, in the prior art, the commonly used forklift gantry axle head welding tooling platform does not have the function of automatically positioning the axle head and automatically flipping the parts when in use, is not convenient for adjusting the axle head at multiple angles, and is not suitable for welding various types of gantry channel steel axle heads. It has a low degree of automation, poor precision, and poor practicality. In addition, during the welding process, workers need to hold the welding gun head for manual welding operations, which increases the workload, makes the operation cumbersome, time-consuming, and labor-intensive, and has low welding efficiency. The effect of manual welding is not ideal. Therefore, we propose an automatic tooling for forklift gantry axle head welding to solve the above problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic tooling for welding the axle head of a forklift mast, which solves the problems that the existing forklift mast axle head welding tooling platform does not have the function of automatically positioning the axle head and automatically flipping the parts when in use, is not convenient for multi-angle adjustment of the axle head, is not suitable for welding of various types of mast channel steel axle heads, has a low degree of automation, poor precision and poor practicality, and during the welding process, the staff needs to hold the welding gun head for manual welding operations, which increases the workload, the operation is cumbersome and time-consuming and labor-intensive, the welding efficiency is low, and the manual welding effect is not ideal.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic assembly welding tool for a forklift mast axle head, comprising a base, two end face positioning devices are fixedly installed on the top of the base, a rotating device is fixedly installed on the top of the base, a clamping device is slidably installed on the top of the base, a three-axis slide is fixedly installed on the base, an angle adjustment device is rotatably installed on the three-axis slide, a shaft head grabber is fixedly installed on the bottom of the angle adjustment device, two external positioning blocks are fixedly installed on the top of the base, an internal positioning device is fixedly installed on the top of the base, and a vertical plate is fixedly installed on the top of the base. A rectangular hole is provided on one side of the vertical plate, and sliding grooves are provided on the top inner wall and the bottom inner wall of the rectangular hole. Slide seats are slidably installed in the two sliding grooves, and the sides of the two slide seats that are close to each other extend to the outside of the corresponding sliding grooves respectively. The sides of the two slide seats that are close to each other are respectively fixedly installed with an upper connecting seat and a lower connecting seat, and the sides of the upper connecting seat and the lower connecting seat that are close to each other are fixedly installed with the same vertical guide rod, a movable seat is slidably sleeved on the vertical guide rod, and a mounting hole is provided on one side of the movable seat, a longitudinal adjustment mechanism and a lateral adjustment mechanism are provided on the vertical plate, and a clamping assembly is provided on the movable seat.

[0008] Preferably, the longitudinal adjustment mechanism includes a longitudinal screw rod and a first motor, a threaded hole is provided at the top of the movable seat, the longitudinal screw rod is threadedly installed in the threaded hole, both ends of the longitudinal screw rod extend out of the threaded hole, a groove is provided at the top of the lower connecting seat, the first motor is fixedly installed in the groove, and the output shaft end of the first motor extends out of the groove and is fixedly connected to the bottom end of the longitudinal screw rod.

[0009] Preferably, a first bearing seat is fixedly mounted on the bottom of the upper connecting seat, and the top end of the longitudinal screw rod is rotatably mounted on the first bearing seat.

[0010] Preferably, the clamping assembly includes two pull rods, two arc-shaped clamping plates, two pull plates and two springs. Through holes are opened on the top inner wall and the bottom inner wall of the mounting hole. The two pull rods are respectively slidably installed in the corresponding through holes. Both ends of the pull rods extend out of the through holes. The two arc-shaped clamping plates are respectively fixedly installed on the ends of the two pull rods that are close to each other. The two pull plates are respectively fixedly installed on the ends of the two pull rods that are away from each other. The two springs are respectively fixedly installed on the sides of the two pull plates that are close to each other, and the two springs are respectively sleeved on the corresponding pull rods. The ends of the two springs away from the corresponding pull plates are respectively fixedly connected to the top and bottom of the movable seat.

[0011] Preferably, limit rods are fixedly installed on the inner walls on both sides of the through hole, limit grooves are provided on both sides of the pull rod, the limit rods are slidably installed in the corresponding limit grooves, and anti-slip pads are fixedly installed on the sides where the two arc-shaped clamping plates are close to each other.

[0012] Preferably, the lateral adjustment mechanism includes two lateral screw rods, two rotating shafts, two pulleys, a belt, a protective cover and a second motor, the two lateral screw rods are both arranged in the rectangular holes, the upper connecting seat and the lower connecting seat are respectively threadedly sleeved on the corresponding lateral screw rods, two circular holes are opened on the right inner wall of the rectangular hole, the two rotating shafts are respectively rotatably installed in the corresponding circular holes, both ends of the rotating shafts extend outside the circular holes, one end of the two lateral screw rods are respectively fixedly connected to the left end of the corresponding rotating shaft, the two pulleys are respectively fixedly sleeved on the right end of the corresponding rotating shaft, the belt is wound around the two pulleys, the protective cover is fixedly installed on the right side wall of the vertical plate, the two pulleys and the belt are both located in the protective cover, the second motor is fixedly installed in the protective cover, and the output shaft end of the second motor is fixedly connected to the right end of one of the two rotating shafts.

[0013] Preferably, two second bearing seats are fixedly installed on the left inner wall of the rectangular hole, and the two transverse screw rods are rotatably installed on the corresponding second bearing seats at one end away from the corresponding rotating shaft. Bearings are fixedly sleeved on the two rotating shafts, and the outer rings of the two bearings are fixedly connected to the inner walls of the corresponding circular holes.

[0014] Preferably, transverse guide rods are fixedly installed in the two slide grooves, and the two slide seats are fixedly sleeved on the corresponding transverse guide rods respectively.

[0015] Preferably, a controller is fixedly mounted on the front side wall of the vertical plate, and a plurality of control buttons are mounted on the controller.

[0016] (III) Beneficial effects

[0017] The present invention provides an automatic welding tool for a forklift mast axle head. It has the following beneficial effects:

[0018] (1) This kind of automatic welding tooling for forklift gantry axle head can clamp and fix the gantry channel steel by using a clamping device, can flip and adjust the fixed gantry channel steel by using a rotating mechanism, can grab and fix the axle head by using an axle head grabber, can adjust the inclination angle of the grabbed axle head by using an angle adjustment device, can locate the outer width of the gantry channel steel by using two outer positioning blocks, and can locate the inner width of the gantry channel steel by using an inner positioning device, thereby realizing automatic positioning of the axle head, automatic flipping of parts, and multi-angle adjustment of the axle head. It is suitable for welding of gantry channel steel axle heads of different types such as C-type, H-type, and J-type, and is equipped with two positioning options of the inner width and outer width of the gantry channel steel, and has the characteristics of high degree of automation, high precision, and strong versatility.

[0019] (2) This forklift gantry axle head assembly welding automatic tooling can quickly clamp and fix the welding gun head in the installation hole by utilizing the clamping effect of two arc-shaped clamping plates and cooperating with the elastic force of two springs, thereby firmly clamping the welding gun head.

[0020] (3) This kind of automatic welding tooling for the shaft head of the forklift gantry can control the rotation of the longitudinal screw by starting the first motor to rotate forward or reverse, and then control the movable seat and the firmly clamped welding gun head to rise or fall, so as to facilitate the adjustment of the height position of the welding gun head; by starting the second motor to rotate forward or reverse, the upper connecting seat and the lower connecting seat can be controlled to move horizontally to the left or right at the same time, and the upper connecting seat and the lower connecting seat drive the vertical guide rod, the longitudinal screw, the movable seat and the firmly clamped welding gun head to move horizontally to the left or right, so as to facilitate the adjustment of the horizontal position of the welding gun head; by adjusting the welding gun head clamped and fixed on the movable seat to the contact point with the gantry channel steel and the shaft head, welding work can be carried out, so that the staff does not need to hold the welding gun head for manual welding operations, which reduces the workload, saves time and effort, and improves welding efficiency and welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional structure diagram of the main view of the present invention;

[0022] Figure 2 It is a schematic diagram of the main structure of the vertical board;

[0023] Figure 3 It is a schematic diagram of the main cross-sectional structure of the vertical plate;

[0024] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0025] Figure 5 for Figure 3 Schematic diagram of the enlarged portion B.

[0026] In the figure: 1. base; 2. end face positioning device; 3. rotating device; 4. clamping device; 5. shaft head grabber; 6. angle adjustment device; 7. three-axis slide; 8. external positioning block; 9. internal positioning device; 10. vertical plate; 11. rectangular hole; 12. slide groove; 13. slide seat; 14. upper connecting seat; 15. lower connecting seat; 16. vertical guide rod; 17. movable seat; 18. threaded hole; 19. longitudinal screw rod; 20. first motor; 21. mounting hole; 22. pull rod; 23. arc splint; 24. pull plate; 25. spring; 26. transverse screw rod; 27. rotating shaft; 28. pulley; 29. ​​belt; 30. protective cover; 31. second motor; 32. transverse guide rod; 33. controller. 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] like Figure 1-5 As shown, the present invention provides a technical solution: an automatic tooling for welding the shaft head of a forklift gantry, comprising a base 1, two end surface positioning devices 2 are fixedly installed on the top of the base 1, a rotating device 3 is fixedly installed on the top of the base 1, a clamping device 4 is slidably installed on the top of the base 1, a three-axis slide 7 is fixedly installed on the base 1, an angle adjustment device 6 is rotatably installed on the three-axis slide 7, a shaft head grabber 5 is fixedly installed on the bottom of the angle adjustment device 6, two external positioning blocks 8 are fixedly installed on the top of the base 1, an internal positioning device 9 is fixedly installed on the top of the base 1, a vertical plate 10 is fixedly installed on the top of the base 1, a rectangular hole 11 is opened on one side of the vertical plate 10, a slide groove 12 is opened on the top inner wall and the bottom inner wall of the rectangular hole 11, a slide seat 13 is slidably installed in the two slide grooves 12, and the two slide seats 13 are close to each other. The sides extend to the outside of the corresponding slide groove 12 respectively, and the upper connecting seat 14 and the lower connecting seat 15 are fixedly installed on the side where the two slide seats 13 are close to each other, and the same vertical guide rod 16 is fixedly installed on the side where the upper connecting seat 14 and the lower connecting seat 15 are close to each other. A movable seat 17 is slidably sleeved on the vertical guide rod 16, and a mounting hole 21 is opened on one side of the movable seat 17. A longitudinal adjustment mechanism and a transverse adjustment mechanism are provided on the vertical plate 10, and a clamping assembly is provided on the movable seat 17. By providing the longitudinal adjustment mechanism, the height position of the movable seat 17 can be conveniently adjusted. By providing the transverse adjustment mechanism, the horizontal position of the movable seat 17 can be conveniently adjusted. By providing the clamping assembly, the welding gun head can be clamped and fixed in the mounting hole 21, so that the staff does not need to hold the welding gun head for manual welding operations.

[0029] In this embodiment, the longitudinal adjustment mechanism includes a longitudinal screw rod 19 and a first motor 20. A threaded hole 18 is provided at the top of the movable seat 17. The longitudinal screw rod 19 is threadedly installed in the threaded hole 18. Both ends of the longitudinal screw rod 19 extend to the outside of the threaded hole 18. A groove is provided at the top of the lower connecting seat 15. The first motor 20 is fixedly installed in the groove. The output shaft end of the first motor 20 extends outside the groove and is fixedly connected to the bottom end of the longitudinal screw rod 19. By utilizing the first motor 20, the longitudinal screw rod 19 can be driven to rotate. By utilizing the threaded connection between the longitudinal screw rod 19 and the threaded hole 18, the movable seat 17 can be controlled to be raised and lowered.

[0030] In this embodiment, a first bearing seat is fixedly installed at the bottom of the upper connecting seat 14, and the top end of the longitudinal screw rod 19 is rotatably installed on the first bearing seat. By setting the first bearing seat, the installation position of the longitudinal screw rod 19 is supported and positioned, so that the longitudinal screw rod 19 can rotate smoothly.

[0031] In this embodiment, the clamping assembly includes two pull rods 22, two arc-shaped clamping plates 23, two pull plates 24 and two springs 25. Through holes are opened on the top inner wall and the bottom inner wall of the mounting hole 21. The two pull rods 22 are respectively slidably installed in the corresponding through holes. Both ends of the pull rods 22 extend outside the through holes. The two arc-shaped clamping plates 23 are respectively fixedly installed on the ends of the two pull rods 22 that are close to each other. The two pull plates 24 are respectively fixedly installed on the ends of the two pull rods 22 that are away from each other. The two springs 25 are respectively fixedly installed on the sides of the two pull plates 24 that are close to each other, and the two springs 25 are respectively sleeved on the corresponding pull rods 22. The ends of the two springs 25 away from the corresponding pull plates 24 are respectively fixedly connected to the top and bottom of the movable seat 17. By utilizing the two arc-shaped clamping plates 23 and cooperating with the elastic force of the two springs 25, the welding gun head can be clamped and fixed.

[0032] In this embodiment, limiting rods are fixedly installed on the inner walls on both sides of the through hole, limiting grooves are provided on both sides of the pull rod 22, the limiting rods are slidably installed in the corresponding limiting grooves, and anti-slip pads are fixedly installed on the sides where the two arc-shaped clamping plates 23 are close to each other. By setting the limiting rods to be slidably connected in the limiting grooves, the sliding stroke of the pull rod 22 is limited. By setting two anti-slip pads and utilizing the two anti-slip pads to contact the outer surface of the welding gun head, the clamping and fixation of the welding gun head is more secure.

[0033] In this embodiment, the lateral adjustment mechanism includes two lateral screw rods 26, two rotating shafts 27, two pulleys 28, a belt 29, a protective cover 30 and a second motor 31. The two lateral screw rods 26 are both arranged in the rectangular hole 11. The upper connecting seat 14 and the lower connecting seat 15 are respectively threadedly sleeved on the corresponding lateral screw rods 26. Two circular holes are provided on the right inner wall of the rectangular hole 11. The two rotating shafts 27 are respectively rotatably installed in the corresponding circular holes. Both ends of the rotating shaft 27 extend outside the circular hole. One end of the two lateral screw rods 26 is respectively fixedly connected to the left end of the corresponding rotating shaft 27. The two pulleys 28 are respectively fixedly sleeved on the corresponding rotating shaft 27. At the right end of the vertical plate 10, the belt 29 is wound around the two pulleys 28, the protective cover 30 is fixedly installed on the right side wall of the vertical plate 10, the two pulleys 28 and the belt 29 are both located in the protective cover 30, the second motor 31 is fixedly installed in the protective cover 30, and the output shaft end of the second motor 31 is fixedly connected to the right end of one of the two rotating shafts 27. By using the second motor 31 as a driving source, under the transmission action of the two pulleys 28 and the belt 29, the two horizontal screw rods 26 can be controlled to rotate synchronously, and then the upper connecting seat 14 and the lower connecting seat 15 can be controlled to move horizontally at the same time, so that the horizontal position of the movable seat 17 can be adjusted.

[0034] In this embodiment, two second bearing seats are fixedly installed on the left inner wall of the rectangular hole 11, and the ends of the two transverse screw rods 26 away from the corresponding rotating shafts 27 are respectively rotatably installed on the corresponding second bearing seats. Bearings are fixedly sleeved on the two rotating shafts 27, and the outer rings of the two bearings are respectively fixedly connected to the inner walls of the corresponding circular holes. By setting the bearing seats, the installation position of the transverse screw rods 26 can be supported and positioned, and by setting the bearings, the installation position of the rotating shaft 27 can be supported and positioned.

[0035] In this embodiment, transverse guide rods 32 are fixedly installed in the two slide grooves 12, and the two slide seats 13 are fixedly sleeved on the corresponding transverse guide rods 32 respectively. By setting two transverse guide rods 32, the upper connecting seat 14 and the lower connecting seat 15 can slide smoothly in the corresponding slide grooves 12.

[0036] In this embodiment, a controller 33 is fixedly installed on the front side wall of the vertical plate 10, and a plurality of control buttons are installed on the controller 33. The first motor 20, the second motor 31 and the controller 33 are electrically connected to the external power line in sequence through wires to form a loop. The first motor 20 and the second motor 31 are both forward and reversible motors. The plurality of control buttons on the controller 33 can respectively control the start and stop and forward and reversal operation of the first motor 20 and the second motor 31.

[0037] In this embodiment, when in use, by arranging the base 1, the end face positioning device 2, the rotating device 3, the clamping device 4, the shaft head grabber 5, the angle adjustment device 6, the three-axis slide 7, the outer positioning block 8, the inner positioning device 9 and the vertical plate 10, an automatic tooling platform for welding the shaft head of the forklift gantry is formed. The clamping device 4 can be used to clamp and fix the gantry channel steel, and the rotating mechanism can be used to flip and adjust the fixed gantry channel steel. The shaft head can be grabbed and fixed by the shaft head grabber 5, and the angle adjustment device 6 can be used to adjust the inclination angle of the grabbed shaft head. The two outer positioning blocks 8 can be used to position the outer width of the gantry channel steel, and the inner positioning device can be used to position the inner width of the gantry channel steel, thereby realizing the ability to adjust the shaft The head can be automatically positioned, the parts can be automatically turned over, and the shaft head can be adjusted at multiple angles. It is suitable for welding of different types of portal channel steel shaft heads such as C-type, H-type, and J-type, and is equipped with two positioning options for the inner width and outer width of the portal channel steel. It has the characteristics of high automation, accurate precision, and strong versatility. After the portal channel steel and the shaft head are positioned, the two pull plates 24 are pulled away from each other, and the two springs 25 are stretched and deformed to generate elastic force, so that the two pull plates 24 drive the corresponding pull rods 22 and arc clamps 23 to move, and the distance between the two arc clamps 23 gradually increases, and then the welding gun head electrically connected to the electric welding machine is passed through the mounting hole 21, and the welding gun head is located between the two arc clamps 23, and then the two pull plates 24 are released. , under the elastic force of the two springs 25, the two arc-shaped clamping plates 23 can be used to firmly clamp and fix the welding gun head. After the welding gun head is clamped and fixed, by starting the first motor 20 to rotate forward, the first motor 20 drives the longitudinal screw rod 19 to rotate, so that the movable seat 17 and the firmly clamped welding gun head are raised. By starting the first motor 20 to rotate reversely, the first motor 20 drives the longitudinal screw rod 19 to rotate in the opposite direction, so that the movable seat 17 and the firmly clamped welding gun head are lowered, thereby facilitating the adjustment of the height position of the welding gun head. By starting the second motor 31 to rotate forward, under the transmission action of the two pulleys 28 and the belt 29, the two transverse screw rods 26 can be controlled to rotate synchronously, thereby controlling the upper connecting seat 14 and the lower connecting seat 15 to move horizontally to the left at the same time, and the upper The connecting seat 14 and the lower connecting seat 15 drive the vertical guide rod 16, the longitudinal screw rod 19, the movable seat 17 and the firmly clamped welding gun head to move horizontally to the left. By starting the second motor 31 to reverse, the upper connecting seat 14 and the lower connecting seat 15 can be controlled to move horizontally to the right at the same time. The upper connecting seat 14 and the lower connecting seat 15 drive the vertical guide rod 16, the longitudinal screw rod 19, the movable seat 17 and the firmly clamped welding gun head to move horizontally to the right, thereby facilitating the adjustment of the horizontal position of the welding gun head. By adjusting the welding gun head clamped and fixed on the movable seat 17 to the contact point with the gantry channel steel and the shaft head, welding work can be carried out, so that the staff does not need to hold the welding gun head for manual welding operation, which reduces the workload, saves time and effort, and improves welding efficiency and welding quality.At the same time, the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0038] In summary, the forklift gantry axle head welding automatic tooling can realize automatic positioning of the axle head, automatic flipping of parts, and multi-angle adjustment of the axle head. It is suitable for welding of various types of gantry channel steel axle heads, and is equipped with two positioning options of the inner width and outer width of the gantry channel steel. It has the characteristics of high degree of automation, accurate precision and strong versatility, and can firmly clamp and fix the welding gun head, and can adjust the height and horizontal position of the welding gun head. There is no need for staff to hold the welding gun head for manual welding operations, which reduces labor, saves time and effort, and improves welding efficiency and welding quality.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding tool for a forklift mast axle head, comprising a base (1), characterized in that: Two end surface positioning devices (2) are fixedly mounted on the top of the base (1), a rotating device (3) is fixedly mounted on the top of the base (1), a clamping device (4) is slidably mounted on the top of the base (1), a three-axis slide (7) is fixedly mounted on the base (1), an angle adjustment device (6) is rotatably mounted on the three-axis slide (7), a shaft head grabber (5) is fixedly mounted on the bottom of the angle adjustment device (6), two external positioning blocks (8) are fixedly mounted on the top of the base (1), an internal positioning device (9) is fixedly mounted on the top of the base (1), a vertical plate (10) is fixedly mounted on the top of the base (1), a rectangular hole (11) is opened on one side of the vertical plate (10), and the top inner wall of the rectangular hole (11) is A slide groove (12) is provided on the inner wall of the bottom, and a slide seat (13) is slidably installed in each of the two slide grooves (12). The sides of the two slide seats (13) close to each other extend to the outside of the corresponding slide groove (12). The sides of the two slide seats (13) close to each other are respectively fixedly installed with an upper connecting seat (14) and a lower connecting seat (15). The sides of the upper connecting seat (14) and the lower connecting seat (15) close to each other are fixedly installed with the same vertical guide rod (16). A movable seat (17) is slidably sleeved on the vertical guide rod (16), and a mounting hole (21) is provided on one side of the movable seat (17). A longitudinal adjustment mechanism and a lateral adjustment mechanism are provided on the vertical plate (10), and a clamping assembly is provided on the movable seat (17).

2. The automatic welding tool for forklift mast axle head according to claim 1, characterized in that: The longitudinal adjustment mechanism comprises a longitudinal screw rod (19) and a first motor (20); a threaded hole (18) is provided at the top of the movable seat (17); the longitudinal screw rod (19) is threadedly installed in the threaded hole (18); both ends of the longitudinal screw rod (19) extend out of the threaded hole (18); a groove is provided at the top of the lower connecting seat (15); the first motor (20) is fixedly installed in the groove; the output shaft end of the first motor (20) extends out of the groove and is fixedly connected to the bottom end of the longitudinal screw rod (19).

3. The automatic welding tool for forklift mast axle head according to claim 2, characterized in that: A first bearing seat is fixedly mounted on the bottom of the upper connecting seat (14), and the top end of the longitudinal screw rod (19) is rotatably mounted on the first bearing seat.

4. The automatic welding tool for forklift mast axle head according to claim 1, characterized in that: The clamping assembly comprises two pull rods (22), two arc-shaped clamping plates (23), two pull plates (24) and two springs (25). Through holes are provided on the top inner wall and the bottom inner wall of the mounting hole (21). The two pull rods (22) are slidably mounted in the corresponding through holes respectively. Both ends of the pull rods (22) extend out of the through holes. The two arc-shaped clamping plates (23) are fixedly mounted on the ends of the two pull rods (22) that are close to each other. The two pull plates (24) are fixedly mounted on the ends of the two pull rods (22) that are away from each other. The two springs (25) are fixedly mounted on the sides of the two pull plates (24) that are close to each other. The two springs (25) are respectively sleeved on the corresponding pull rods (22). The ends of the two springs (25) that are away from the corresponding pull plates (24) are respectively fixedly connected to the top and bottom of the movable seat (17).

5. The automatic welding tool for forklift mast axle head according to claim 4, characterized in that: Limiting rods are fixedly installed on the inner walls of both sides of the through hole, limiting grooves are provided on both sides of the pull rod (22), the limiting rods are slidably installed in the corresponding limiting grooves, and anti-slip pads are fixedly installed on the sides of the two arc-shaped clamping plates (23) that are close to each other.

6. The automatic welding tool for forklift mast axle head according to claim 1, characterized in that: The lateral adjustment mechanism comprises two lateral screw rods (26), two rotating shafts (27), two pulleys (28), a belt (29), a protective cover (30) and a second motor (31). The two lateral screw rods (26) are both arranged in the rectangular hole (11). The upper connecting seat (14) and the lower connecting seat (15) are respectively threadedly sleeved on the corresponding lateral screw rods (26). Two circular holes are provided on the right inner wall of the rectangular hole (11). The two rotating shafts (27) are respectively rotatably installed in the corresponding circular holes. Both ends of the rotating shafts (27) extend outside the circular holes. The two lateral screw rods (26) are respectively threadedly sleeved on the corresponding lateral screw rods (26). One end of the second motor (31) is fixedly connected to the left end of the corresponding rotating shaft (27), the two pulleys (28) are fixedly sleeved on the right end of the corresponding rotating shaft (27), the belt (29) is wound around the two pulleys (28), the protective cover (30) is fixedly installed on the right side wall of the vertical plate (10), the two pulleys (28) and the belt (29) are both located in the protective cover (30), the second motor (31) is fixedly installed in the protective cover (30), and the output shaft end of the second motor (31) is fixedly connected to the right end of one of the two rotating shafts (27).

7. The automatic welding tool for forklift mast axle head according to claim 6, characterized in that: Two second bearing seats are fixedly mounted on the left inner wall of the rectangular hole (11); one end of the two transverse screw rods (26) away from the corresponding rotating shaft (27) is rotatably mounted on the corresponding second bearing seats; the two rotating shafts (27) are fixedly sleeved with bearings; the outer rings of the two bearings are fixedly connected to the inner walls of the corresponding circular holes.

8. The automatic welding tool for forklift mast axle head according to claim 1, characterized in that: A transverse guide rod (32) is fixedly installed in each of the two slide grooves (12), and the two slide seats (13) are respectively fixedly sleeved on the corresponding transverse guide rod (32).

9. The automatic welding tool for forklift mast axle head according to claim 1, characterized in that: A controller (33) is fixedly mounted on the front side wall of the vertical plate (10), and a plurality of control buttons are mounted on the controller (33).

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