Forklift lifting arm welding tool and method

Abstract

The invention discloses a forklift lifting arm welding tool and method, and relates to the technical field of forklift production auxiliary tools, the forklift lifting arm welding tool comprises a base, a fixing column is fixedly mounted at the top of the base, a mechanical arm is arranged at the top of the fixing column, and a fixing device, a clamping device and a supporting device are arranged above the base; a first rotating motor is matched with a lead screw, a first spiral groove rotates, a sliding block and a fixing frame are used for achieving adjustment according to specific tasks when lifting arms with different lengths are welded, so that the equipment meets the requirements for different heights and distances, and the operation flexibility is improved; a second rotating motor is matched with a rotating shaft, a third rotating motor, a rotating rod, a second spiral groove and a clamping plate, after the lifting arm is fixed, a fixing block rotates to enable the lifting arm to rotate, a mechanical arm drives a welding gun to conduct welding, and the lifting arm is allowed to be flexibly operated at different angles and in different directions through rotating welding; and various working environments and task requirements can be met.

Description

Technical Field

[0001] The invention relates to the technical field of forklift production auxiliary tools, and in particular to a forklift lifting arm welding tool and method. Background Art

[0002] The lift arm needs to have strength and rigidity to support the stability and safety of the forklift when carrying heavy objects. Use appropriate welding methods (such as gas shielded welding or submerged arc welding) to ensure the strength and quality of the joint while controlling welding deformation.

[0003] The patent with the patent announcement number CN203437858U relates to the technical field of auxiliary tools for forklift production, including a base plate, fastening plates symmetrically arranged at the two ends of the upper side of the base plate, fastening screws arranged on the fastening plates, inner concentric plates symmetrically arranged at the two ends of the upper side of the base plate and located inside the fastening plates, and outer concentric fixing plates symmetrically arranged at the two ends of the upper side of the base plate, and connecting rods connected between the upper parts of the inner concentric plates and between the upper parts of the outer concentric fixing plates. The patent has a reasonable structure, is easy to use, has accurate positioning, does not require the use of measuring tools, and is conducive to improving welding speed and product accuracy.

[0004] In the above patent, no measuring tools are used, which is conducive to improving welding speed and product accuracy. However, the current measuring equipment has the following problems: additional adjustments or reprocessing are required when welding lifting arms of different lengths, which increases production time and labor costs, and the welding position needs to be adjusted multiple times during welding, which increases time consumption and reduces overall production efficiency. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a forklift lifting arm welding tool and method, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a forklift lifting arm welding tool, a forklift lifting arm welding tool, comprising a base, a fixing column is fixedly installed on the top of the base, a mechanical arm is arranged on the top of the fixing column, a welding gun is arranged on the output end of the mechanical arm, and a fixing device, a clamping device and a supporting device are arranged above the base; wherein, the fixing device comprises a rotating motor 1, a screw rod, a slider, a fixing frame, a rotating motor 2, a rotating shaft, a fixing block, a rotating motor 3, a placing plate, a sliding rod, a clamping plate, a No. 1 spring, a rotating rod and a clamping plate, the fixed end of the rotating motor 1 is fixedly installed on the left side of the base, the screw rod is fixedly installed on the output end of the rotating motor 1, the slider is slidably installed on the circumferential surface of the screw rod, the screw rod rotates and passes through the inner and outer walls of the base, the fixing frame is fixedly installed on the top of the slider, and the lifting arms of different lengths can be adjusted according to specific tasks by cooperating with the rotating motor 1, the spiral groove 1 rotates, the slider and the fixing frame, and the fixed end of the rotating motor 2 is fixedly installed The left side of the fixed frame is fixedly installed on the output end of the rotating motor two, and the rotating shaft rotates and passes through the inner and outer walls of the fixed frame, and the fixed block is fixedly installed on the right side of the rotating shaft, and the fixed end of the rotating motor three is fixedly installed on the top of the fixed block, and the placing plate is fixedly installed on the right side of the fixed block, and the sliding rod slides through the inner and outer walls of the fixed block, and the clamping plate is fixedly installed on the right side of the sliding rod, and the No. 1 spring is arranged between the clamping plate and the fixed block. By sliding the lifting arm on the top of the placing plate, the lifting arm will contact the inclined surface of the clamping plate, so that the clamping plate moves inward, and at the same time, it will drive the sliding rod to move and compress the No. 1 spring, and the lifting arm is fixed by the rebound of the No. 1 spring. The rotating rod is fixedly installed on the output end of the rotating motor three, and the rotating rod rotates and passes through the inner and outer walls of the fixed block, and the clamping plate is slidably installed on the circumferential surface of the rotating rod. After the lifting arm is fixed, the rotating motor two cooperates with the rotating shaft, the rotating motor three, the rotating rod, the spiral groove two and the clamping plate, and the lifting arm is rotated by the fixed block, and the welding gun is driven by the mechanical arm to weld.

[0007] According to the above technical solution, the circumferential surface of the screw rod is provided with a spiral groove 1, and the spiral groove 1 is threadedly connected to the slider. The rotation of the screw rod drives the spiral groove 1 to rotate, and the rotation of the spiral groove 1 causes the slider to move back and forth left and right. The circumferential surface of the rotating rod is provided with a spiral groove 2, and the spiral groove 2 is threadedly connected to the clamping plate. The rotation of the rotating rod drives the spiral groove 2 to rotate, and the rotation of the spiral groove 2 causes the clamping plate to move back and forth up and down. The right side of the positioning plate is set as an inclined surface.

[0008] According to the above technical solution, the clamping device includes a sliding column, a pressure plate, a No. 2 spring and a short rod. The sliding column slides through the inner and outer walls of the clamp plate. The pressure plate is fixedly installed at the bottom of the sliding column. The No. 2 spring is arranged between the clamp plate and the pressure plate. One side of the short rod is fixedly installed on the top of the pressure plate. The other side of the short rod is slidably installed on the inner and outer walls of the clamp plate. The sliding column is driven to move by the downward movement of the clamp plate, and the movement of the sliding column drives the pressure plate to move until it contacts the lifting arm, thereby clamping the lifting arm.

[0009] According to the above technical solution, the clamping device also includes a locking groove and a locking block, the locking groove is arranged on the right side of the fixed block, the locking block is slidably installed on the top of the splint, a No. 3 spring is arranged between the locking block and the splint, the left side of the locking block is arranged as an inclined surface, and the right side of the locking block is arranged as an inclined surface, and the locking block moves toward the fixed block until it is inserted into the locking groove, at which time the splint cannot continue to move downward.

[0010] According to the above technical solution, the clamping device also includes an electric push rod and a fixing button. The fixed end of the electric push rod is fixedly installed on the top of the base, and the fixing button is fixedly installed on the output end of the electric push rod. The movement of the output end of the electric push rod drives the fixing button to move.

[0011] According to the above technical solution, the clamping device also includes a gear, a rack block and a connecting frame. The gear is rotatably installed on the inner wall of the fixing button, the connecting frame is fixedly installed on the fixed end of the electric push rod, and the rack block is slidably installed on the inner wall of the connecting frame. The gear is meshed with the rack block. The movement of the fixing button drives the gear to move, and the movement of the gear drives the rack block to move, thereby supporting the bottom of the lifting arm.

[0012] According to the above technical solution, the supporting device includes a fixed cylinder, a supporting plate and a pressure rod, the fixed cylinder is fixedly installed on the top of the base, the supporting plate is fixedly installed on the top of the rack block, one side of the pressure rod is fixedly installed on the bottom of the rack block, and the other side of the pressure rod slides through the inner and outer walls of the connecting frame. Hydraulic oil is provided inside the fixed cylinder, and the welding of the lifting arm is supported by the support plate.

[0013] According to the above technical solution, the supporting device also includes a No. 4 spring, a piston block and a sealing block. The piston block is fixedly installed at the bottom of the pressure rod, the sealing block is arranged at the top of the fixed cylinder, the No. 4 spring is arranged between the pressure rod and the sealing block, the pressure rod is slidably installed on the inner and outer walls of the sealing block, and a slot hole is opened on the top of the piston block. The rack block cooperates with the pressure rod, the No. 4 spring, the piston block, the fixed cylinder, the hydraulic oil, the slot hole and the sealing block to suppress the reset speed of the No. 4 spring, and buffer the movement of the rack block when the lifting arm is supported.

[0014] A forklift lifting arm welding tool comprises the following steps: Step 1: Move the fixed frame by rotating motor 1, adjust the length of the lifting arm, slide the lifting arm to the top of the placement plate, fix the positions of both sides of the lifting arm by the clamping plate, and rotate the lifting arm by rotating motor 2 after clamping, and drive the welding gun by the mechanical arm to weld; Step 2: After the lifting arm is fixed, the lifting arm is clamped by the pressure plate. When the clamping force is too large, the clamping block is clamped into the clamping slot to limit the movement of the clamping plate to prevent the lifting arm from being worn due to excessive clamping force. The electric push rod is used to support the bottom of the lifting arm. Step 3: When supporting the lifting arm, because the force points are on both sides of the lifting arm, the force in the center will be too large. At this time, the bottom of the lifting arm is supported by the support plate. Because the surface of the lifting arm is irregular, it is contacted with the support plate, and the positions of the two support plates are corrected in conjunction with the rack block and the gear. When the rack block moves, the piston block squeezes the hydraulic oil to buffer the rack block to prevent the support plate from being worn due to excessive force during support.

[0015] The present invention provides a forklift lifting arm welding tool and method, which has the following beneficial effects: (1) The invention, through the setting of the fixing device, realizes that the lifting arms of different lengths can be adjusted according to the specific tasks by rotating the motor 1 in cooperation with the screw rod, the spiral groove 1, the slider and the fixing frame, so that the equipment can adapt to the requirements of different heights and distances, and improve the flexibility of the operation. The lifting arm is slid and placed on the top of the placement plate, and the lifting arm will contact the inclined surface of the positioning plate. The positioning plate is used to fix the lifting arm by the sliding rod and the first spring. After the lifting arm is fixed, the lifting arm is rotated by rotating the fixing block through the rotating motor 2 in cooperation with the rotating shaft, the rotating motor 3, the rotating rod, the spiral groove 2 and the clamping plate. The welding gun is driven by the mechanical arm to perform welding, that is, the lifting arm is rotationally welded. The lifting arm is allowed to be flexibly operated at different angles and directions through rotational welding to adapt to various working environments and task requirements.

[0016] (2) The invention, through the setting of the clamping device, realizes the clamping of the lifting arm by means of the clamping plate in cooperation with the sliding column and the pressure plate. When the clamping force is too large, the pressure plate is forced to move upward to cooperate with the sliding column, the second spring, the short rod, the clamping block, the fixed block and the clamping groove so that the clamping plate cannot continue to move downward, that is, the lifting arm is prevented from being pinched. The anti-pinching design can protect the lifting arm, reduce wear, extend the service life, reduce the risk of workers being injured during operation, and ensure the safety of the working environment. The support under the lifting arm is realized by the electric push rod in cooperation with the fixing button, the gear and the rack block.

[0017] (3) The invention, through the setting of the support device, drives the support plate to support the welding of the lifting arm by moving the rack block, so as to prevent the center area from being subjected to greater pressure when welding some longer lifting arms because the force points are on both sides of the lifting arm, thereby affecting the stability of the structure. Because the surface of the lifting arm is irregular, the support plate will move due to the different heights when in contact, so that the gear rotates, driving the position of the rack block on the other side to be corrected, which can better adapt to different shapes and ensure that it is not easy to slide or fall off during welding. When supporting the lifting arm, the rack block cooperates with the pressure rod, No. 4 spring, piston block, fixing cylinder, hydraulic oil, slot and sealing block to suppress the reset speed of the No. 4 spring, buffer the movement of the rack block when supporting the lifting arm, and prevent the support plate from being subjected to excessive force and causing wear during support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the position structure of the rotating motor 1 and the rotating motor 2 of the present invention; Figure 3 It is a schematic diagram of the position structure of the fixing frame and the fixing block of the present invention; Figure 4 It is a schematic diagram of a partial cross-sectional structure of the fixing device of the present invention; Figure 5 It is a schematic diagram of a partial cross-sectional structure of the clamping device of the present invention; Figure 6 It is a schematic diagram of the structure of the support device of the present invention; Figure 7 It is a schematic diagram of the position structure of the piston block and the pressure rod of the present invention.

[0019] In the figure: 1. base; 2. fixed column; 3. mechanical arm; 4. welding gun; 10. rotating motor one; 11. screw rod; 12. slider; 13. fixed frame; 14. rotating motor two; 15. rotating shaft; 16. fixed block; 17. rotating motor three; 18. placement plate; 19. sliding rod; 110. positioning plate; 111. spring No. 1; 112. rotating rod; 113. clamping plate; 20. sliding column; 21. pressure plate; 22. spring No. 2; 23. short rod; 24. positioning groove; 25. clamping block; 26. electric push rod; 27. fixing button; 28. gear; 29. ​​rack block; 210. connecting frame; 31. fixing cylinder; 32. supporting plate; 33. pressure rod; 34. spring No. 4; 35. piston block; 36. sealing block. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-Figure 5 , one embodiment of the present invention is: a forklift lifting arm welding tool, comprising a base 1, a fixing column 2 is fixedly installed on the top of the base 1, a mechanical arm 3 is arranged on the top of the fixing column 2, a welding gun 4 is arranged on the output end of the mechanical arm 3, and a fixing device is arranged above the base 1, the fixing device comprises a rotating motor 10, a screw rod 11, a slider 12, a fixing frame 13, a rotating motor 2 14, a rotating shaft 15, a fixing block 16, a rotating motor 3 17, a placing plate 18, a sliding rod 19, a clamping plate 110, a spring 111, a rotating rod 112 and a clamping plate 113, the fixed end of the rotating motor 10 is fixedly installed on the left side of the base 1, the screw rod 11 is fixedly installed on the output end of the rotating motor 10, and the slider 12 is slidably installed on the circumferential surface of the screw rod 11, so that lifting arms of different lengths can be adjusted according to specific tasks, so that the equipment can adapt to the needs of different heights and distances, and the flexibility of the operation is improved, the screw rod 11 rotates and passes through the inner and outer walls of the base 1, and the fixing frame 13 is fixed It is installed on the top of the slider 12, the fixed end of the rotating motor 2 14 is fixedly installed on the left side of the fixing frame 13, the rotating shaft 15 is fixedly installed on the output end of the rotating motor 2 14, the rotating shaft 15 rotates and passes through the inner and outer walls of the fixing frame 13, the fixed block 16 is fixedly installed on the right side of the rotating shaft 15, the fixed end of the rotating motor 3 17 is fixedly installed on the top of the fixed block 16, the placing plate 18 is fixedly installed on the right side of the fixed block 16, the sliding rod 19 slides through the inner and outer walls of the fixed block 16, the locking plate 110 is fixedly installed on the right side of the sliding rod 19, and the No. 1 spring 111 is arranged between the locking plate 110 and the fixed block 16. The locking plate 110 is reset by the arranged No. 1 spring 111, the rotating rod 112 is fixedly installed on the output end of the rotating motor 3 17, the rotating rod 112 rotates and passes through the inner and outer walls of the fixed block 16, and the clamping plate 113 is slidably installed on the circumferential surface of the rotating rod 112. Through rotary welding, the lifting arm is allowed to operate flexibly at different angles and directions to adapt to various working environments and task requirements.

[0022] The circumferential surface of the screw rod 11 is provided with a spiral groove 1, which is threadedly connected to the slider 12, so that the slider 12 can move back and forth left and right. The circumferential surface of the rotating rod 112 is provided with a spiral groove 2, which is threadedly connected to the clamping plate 113, so that the clamping plate 113 can move back and forth up and down. The right side of the locking plate 110 is set as an inclined surface.

[0023] A method for welding a forklift lifting arm tooling comprises the following steps: Step 1: Move the fixing frame 13 by rotating the motor 10, adjust the length of the lifting arm, slide the lifting arm on the top of the placement plate 18, fix the positions of both sides of the lifting arm by the clamping plate 110, and rotate the lifting arm by rotating the motor 2 14 after clamping, and drive the welding gun 4 by the robot arm 3 to weld; Step 2: After the lifting arm is fixed, the lifting arm is clamped by the pressing plate 113. When the clamping force is too large, the clamping block 25 is clamped into the clamping groove 24 to limit the movement of the clamping plate 113 to prevent the lifting arm from being worn due to excessive clamping force. The rack block 29 is supported by the electric push rod 26 below the lifting arm. Step 3: When supporting the lifting arm, because the force points are on both sides of the lifting arm, the force in the center will be too large. At this time, the bottom of the lifting arm is supported by the support plate 32. Because the surface of the lifting arm is irregular, it is contacted with the support plate 32, and the positions of the two support plates 32 are corrected in conjunction with the rack block 29 and the gear 28. When the rack block 29 moves, the piston block 35 squeezes the hydraulic oil to buffer the rack block 29 to prevent the support plate 32 from being subjected to excessive force during support and causing wear.

[0024] When the present embodiment is working, the screw rod 11 is driven to rotate by the rotating motor 10, and the screw rod 11 is driven to rotate by the rotating screw rod 11, and the spiral groove 1 is driven to rotate, and the slider 12 is driven to move back and forth left and right. When the slider 12 moves, it drives the fixing frame 13 to move, so that the lifting arms of different lengths can be adjusted according to the specific tasks, so that the equipment can adapt to the requirements of different heights and distances, and the flexibility of the operation is improved. By sliding the lifting arm to the top of the placement plate 18, the lifting arm will contact the inclined surface of the positioning plate 110 at this time, so that the positioning plate 110 moves inward, and at the same time, it will drive the sliding rod 19 to move and compress the No. 1 spring 111, through the No. 1 The rebound of the spring 111 fixes the lifting arm, and the rotation of the rotating motor 2 14 drives the rotating shaft 15 to rotate, and the rotation of the rotating shaft 15 drives the fixing block 16 to rotate, and the rotation of the rotating motor 3 17 drives the rotating rod 112 to rotate, and the rotation of the rotating rod 112 drives the spiral groove 2 to rotate, and the rotation of the spiral groove 2 causes the clamping plate 113 to move up and down reciprocatingly. After the lifting arm is fixed, the lifting arm is rotated by rotating the fixing block 16, and the welding gun 4 is driven by the mechanical arm 3 to perform welding, that is, the lifting arm is rotationally welded. The rotational welding allows the lifting arm to be flexibly operated at different angles and directions to adapt to various working environments and task requirements.

[0025] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, a clamping device and a supporting device are arranged above the base 1, and the clamping device includes a sliding column 20, a pressure plate 21, a No. 2 spring 22 and a short rod 23. The sliding column 20 slides through the inner and outer walls of the clamp 113, and the pressure plate 21 is fixedly installed at the bottom of the sliding column 20. The No. 2 spring 22 is arranged between the clamp 113 and the pressure plate 21. The pressure plate 21 is reset by the No. 2 spring 22. One side of the short rod 23 is fixedly installed on the top of the pressure plate 21, and the other side of the short rod 23 is slidably installed on the inner and outer walls of the clamp 113 to achieve clamping of the lifting arm.

[0026] The clamping device also includes a positioning groove 24 and a blocking block 25. The positioning groove 24 is arranged on the right side of the fixed block 16. The blocking block 25 is slidably installed on the top of the clamping plate 113. A No. 3 spring is arranged between the blocking block 25 and the clamping plate 113. The No. 3 spring is used to drive the blocking block 25 to reset. The left side of the blocking block 25 is arranged as an inclined plane, and the right side of the blocking block 25 is arranged as an inclined plane to prevent the lifting arm from being pinched. The anti-pinching design can protect the lifting arm, reduce wear, extend the service life, reduce the risk of workers being injured during operation, and ensure the safety of the working environment.

[0027] The clamping device also includes an electric push rod 26 and a fixing button 27. The fixed end of the electric push rod 26 is fixedly installed on the top of the base 1, and the fixing button 27 is fixedly installed on the output end of the electric push rod 26. The fixed button 27 moves when the output end of the electric push rod 26 moves.

[0028] The clamping device also includes a gear 28, a rack block 29 and a connecting frame 210. The gear 28 is rotatably installed on the inner wall of the fixing button 27, the connecting frame 210 is fixedly installed on the fixed end of the electric push rod 26, and the rack block 29 is slidably installed on the inner wall of the connecting frame 210. The gear 28 is meshed with the rack block 29. The movement of the fixing button 27 drives the gear 28 to move, and the movement of the gear 28 drives the rack block 29 to move, thereby supporting the bottom of the lifting arm to prevent the center area from being subjected to greater pressure when welding some longer lifting arms because the force points are on both sides of the lifting arms, thereby affecting the stability of the structure.

[0029] The supporting device includes a fixed cylinder 31, a supporting plate 32 and a pressure rod 33. The fixed cylinder 31 is fixedly installed on the top of the base 1, the supporting plate 32 is fixedly installed on the top of the rack block 29, one side of the pressure rod 33 is fixedly installed on the bottom of the rack block 29, and the other side of the pressure rod 33 slides through the inner and outer walls of the connecting frame 210. Hydraulic oil is provided inside the fixed cylinder 31, which can better adapt to different shapes and ensure that it is not easy to slide or fall off during welding, when supporting the lifting arm.

[0030] The supporting device also includes a No. 4 spring 34, a piston block 35 and a sealing block 36. The piston block 35 is fixedly installed at the bottom of the pressure rod 33, and the sealing block 36 is arranged at the top of the fixed cylinder 31. The No. 4 spring 34 is arranged between the pressure rod 33 and the sealing block 36. The movement of the rack block 29 is buffered by the arranged No. 4 spring 34. The pressure rod 33 is slidably installed on the inner and outer walls of the sealing block 36. A slot is opened on the top of the piston block 35 to buffer the movement of the rack block 29 when the lifting arm is supported, so as to prevent the support plate 32 from being subjected to excessive force and causing wear during support.

[0031] When the present embodiment is working, the sliding column 20 is driven to move by the downward movement of the clamping plate 113, and the movement of the sliding column 20 drives the pressure plate 21 to move until it contacts the lifting arm, thereby clamping the lifting arm. When the clamping force is too large, the pressure plate 21 is forced to move upward, and the movement of the pressure plate 21 drives the sliding column 20 to move, compressing the second spring 22, and driving the short rod 23 to move upward. The movement of the short rod 23 contacts the inclined surface of the card block 25, so that the card block 25 moves toward the fixed block 16 until it is inserted into the card slot 24. At this time, the clamping plate 113 cannot continue to move downward. At the same time, the clamping plate 113 moves upward so that the inclined surface of the clamping block 25 contacts the inner wall of the clamping groove 24. At this time, the clamping block 25 is separated from the clamping groove 24 and reset by the third spring, that is, the lifting arm is prevented from being pinched. The anti-pinching design can protect the lifting arm, reduce wear, extend the service life, reduce the risk of workers being injured during operation, and ensure the safety of the working environment. The output end of the electric push rod 26 moves to drive the fixing button 27 to move, the fixing button 27 moves to drive the gear 28 to move, and the gear 28 moves to drive the rack block 29 to support the bottom of the lifting arm; The support plate 32 is driven to move by the movement of the rack block 29, and the movement of the support plate 32 will contact the lifting arm to support the welding of the lifting arm, so as to prevent that when welding some longer lifting arms, the center area will be subjected to greater pressure because the force points are on both sides of the lifting arm, thereby affecting the stability of the structure. Because the surface of the lifting arm is irregular, the support plate 32 will move due to the uneven height when in contact, so that the gear 28 rotates, driving the position of the rack block 29 on the other side to be corrected, which can better adapt to different shapes and ensure that it is not easy to slide or fall off during welding. When supporting the lifting arm, the movement of the rack block 29 drives the pressure rod 33 to move, and the movement of the pressure rod 33 will The No. 4 spring 34 is compressed, and the piston block 35 is driven to move at the same time. The piston block 35 will compress the hydraulic oil inside the fixed cylinder 31, so that the hydraulic oil flows from the slot to the top of the piston block 35, and the sealing block 36 blocks the hydraulic oil from leaking out. When the piston block 35 is reset, the speed of the hydraulic oil reflux will be slow because the slot is small, which makes the reset speed of the piston block 35 slower. The slower the reset speed of the piston block 35, the slower the movement speed of the pressure rod 33. The slower the movement speed of the pressure rod 33, the slower the rebound speed of the No. 4 spring 34 will be, that is, the reset speed of the No. 4 spring 34 is limited, and the movement of the rack block 29 during the lifting arm support is buffered to prevent the support plate 32 from being subjected to excessive force during support and causing wear.

[0032] 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. A forklift lifting arm welding tool, comprising a base (1), characterized in that: A fixing column (2) is fixedly mounted on the top of the base (1), a mechanical arm (3) is arranged on the top of the fixing column (2), a welding gun (4) is arranged at the output end of the mechanical arm (3), and a fixing device, a clamping device and a supporting device are arranged above the base (1); The fixing device comprises a rotating motor 1 (10), a screw rod (11), a slider (12), a fixing frame (13), a rotating motor 2 (14), a rotating shaft (15), a fixing block (16), a rotating motor 3 (17), a placing plate (18), a sliding rod (19), a positioning plate (110), a spring (111), a rotating rod (112) and a clamping plate (113), wherein the fixing end of the rotating motor 1 (10) is fixedly mounted on the left side of the base (1), the screw rod (11) is fixedly mounted on the output end of the rotating motor 1 (10), the slider (12) is slidably mounted on the circumferential surface of the screw rod (11), the screw rod (11) rotates and penetrates the inner and outer walls of the base (1), the fixing frame (13) is fixedly mounted on the top of the slider (12), the fixing end of the rotating motor 2 (14) is fixedly mounted on the left side of the fixing frame (13), and the fixing end of the rotating motor 2 (14) is fixedly mounted on the left side of the fixing frame (13). The rotating shaft (15) is fixedly mounted on the output end of the second rotating motor (14); the rotating shaft (15) rotates and penetrates the inner and outer walls of the fixed frame (13); the fixed block (16) is fixedly mounted on the right side of the rotating shaft (15); the fixed end of the third rotating motor (17) is fixedly mounted on the top of the fixed block (16); the placement plate (18) is fixedly mounted on the right side of the fixed block (16); the slide bar (19) slides and penetrates the inner and outer walls of the fixed block (16); the positioning plate (110) is fixedly mounted on the right side of the slide bar (19); the first spring (111) is arranged between the positioning plate (110) and the fixed block (16); the rotating rod (112) is fixedly mounted on the output end of the third rotating motor (17); the rotating rod (112) rotates and penetrates the inner and outer walls of the fixed block (16); and the clamping plate (113) is slidably mounted on the circumferential surface of the rotating rod (112).

2. A forklift lifting arm welding tool according to claim 1, characterized in that: The circumferential surface of the screw rod (11) is provided with a spiral groove 1, the spiral groove 1 is threadedly connected to the slider (12), the circumferential surface of the rotating rod (112) is provided with a spiral groove 2, the spiral groove 2 is threadedly connected to the clamping plate (113), and the right side of the locking plate (110) is provided with an inclined surface.

3. A forklift lifting arm welding tool according to claim 2, characterized in that: The clamping device comprises a sliding column (20), a pressure plate (21), a second spring (22) and a short rod (23); the sliding column (20) slides through the inner and outer walls of the clamp plate (113); the pressure plate (21) is fixedly mounted on the bottom of the sliding column (20); the second spring (22) is arranged between the clamp plate (113) and the pressure plate (21); one side of the short rod (23) is fixedly mounted on the top of the pressure plate (21); and the other side of the short rod (23) is slidably mounted on the inner and outer walls of the clamp plate (113).

4. A forklift lifting arm welding tool according to claim 3, characterized in that: The clamping device further comprises a clamping groove (24) and a clamping block (25), wherein the clamping groove (24) is arranged on the right side of the fixing block (16), the clamping block (25) is slidably mounted on the top of the clamping plate (113), a No. 3 spring is arranged between the clamping block (25) and the clamping plate (113), the left side of the clamping block (25) is arranged as an inclined surface, and the right side of the clamping block (25) is arranged as an inclined surface.

5. A forklift lifting arm welding tool according to claim 4, characterized in that: The clamping device further comprises an electric push rod (26) and a fixing button (27), wherein the fixing end of the electric push rod (26) is fixedly mounted on the top of the base (1), and the fixing button (27) is fixedly mounted on the output end of the electric push rod (26).

6. A forklift lifting arm welding tool according to claim 5, characterized in that: The clamping device further comprises a gear (28), a rack block (29) and a connecting frame (210), wherein the gear (28) is rotatably mounted on the inner wall of the fixing button (27), the connecting frame (210) is fixedly mounted on the fixed end of the electric push rod (26), the rack block (29) is slidably mounted on the inner wall of the connecting frame (210), and the gear (28) is meshed with the rack block (29).

7. A forklift lifting arm welding tool according to claim 6, characterized in that: The support device comprises a fixed cylinder (31), a support plate (32) and a pressure rod (33); the fixed cylinder (31) is fixedly mounted on the top of the base (1); the support plate (32) is fixedly mounted on the top of the rack block (29); one side of the pressure rod (33) is fixedly mounted on the bottom of the rack block (29); the other side of the pressure rod (33) slides through the inner and outer walls of the connecting frame (210); and hydraulic oil is provided inside the fixed cylinder (31).

8. A forklift lifting arm welding tool according to claim 7, characterized in that: The supporting device further comprises a No. 4 spring (34), a piston block (35) and a sealing block (36); the piston block (35) is fixedly mounted on the bottom of the pressure rod (33); the sealing block (36) is arranged on the top of the fixed cylinder (31); the No. 4 spring (34) is arranged between the pressure rod (33) and the sealing block (36); the pressure rod (33) is slidably mounted on the inner and outer walls of the sealing block (36); and a slot is provided on the top of the piston block (35).

9. A method for using a forklift lifting arm welding tool, using the forklift lifting arm welding tool according to claim 8, characterized in that: The following steps are involved: Step 1: The fixing frame (13) is moved by rotating the first motor (10), the length of the lifting arm is adjusted, the lifting arm is slidably placed on the top of the placement plate (18), and the positions of the two sides of the lifting arm are fixed by the clamping plate (110). After the clamping is completed, the lifting arm can be rotated by rotating the second motor (14), and the welding gun (4) can be driven by the mechanical arm (3) to perform welding; Step 2: After the lifting arm is fixed, the lifting arm is clamped by the pressure plate (113). When the clamping force is too large, the clamping block (25) is clamped into the clamping groove (24) to limit the movement of the clamping plate (113) to prevent the lifting arm from being worn due to the excessive clamping force. The rack block (29) is supported below the lifting arm by the electric push rod (26); Step 3: When supporting the lifting arm, because the force points are on both sides of the lifting arm, the force on the center will be too large. At this time, the lower part of the lifting arm is supported by the support plate (32). Because the surface of the lifting arm is irregular, the support plate (32) contacts it, and the positions of the two support plates (32) are corrected by cooperating with the rack block (29) and the gear (28). When the rack block (29) moves, the piston block (35) squeezes the hydraulic oil to buffer the rack block (29), so as to prevent the support plate (32) from being worn due to excessive force during support.

Images