Hand brake shaft automatic rotation welding tool

Abstract

The present invention relates to the field of welding technology, and specifically to a hand brake shaft automatic rotation welding tool. It includes a bracket, a platform is fixed on the upper end of the bracket, and clamping and rotating components are arranged on both sides of the platform. The two clamping and rotating components are symmetrically arranged. A welding component is arranged on one side of the platform part between the two clamping and rotating components. The clamping and rotating component includes a clamping unit and a rotating unit. The rotating unit is located on the platform inside the clamping unit. The rotating unit can drive the shaft to rotate. A driving unit is slidably arranged on the platform on one side of the clamping unit. The driving unit is arranged on the same side as the shaft sleeve. The clamping unit and the driving unit are connected through a transmission component. After the clamping unit clamps the shaft sleeve and the shaft, the rotating unit and the driving unit can respectively drive the shaft and the shaft sleeve to rotate synchronously. When the shaft rotates, the second motor and the third roller can drive the shaft sleeve to rotate, thereby making the shaft sleeve and the shaft rotate synchronously, which can improve the welding quality of the shaft and the shaft sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a hand brake shaft rod automatic rotation welding tool. Background Art

[0002] The handbrake shaft is one of the key components of the freight train braking system, and its performance directly affects the braking effect of the train. Welding the shaft rod and the shaft sleeve together can ensure a tight fit between them and reduce the degradation of braking performance caused by looseness or clearance. This connection method helps to improve the rigidity and strength of the handbrake shaft, thereby ensuring that the train can stop quickly and smoothly when braking.

[0003] Some of the existing shafts and sleeves are welded manually. The welders position the shafts and sleeves together, rotate the shafts and sleeves after welding for a certain distance, and then continue welding. Due to interruptions in the welding process, the connection strength between the welds is not high, thereby reducing the structural strength of the shafts and sleeves after welding.

[0004] When welding the shaft and sleeve, some automatic welding devices need to spot weld the shaft and sleeve first, so as to ensure that the sleeve and shaft can rotate together, which is convenient for continuous welding of the shaft and sleeve. Since the welding gun of the automatic welding device needs to maintain the appropriate position between it and the workpiece during continuous welding, but the welding gun needs to be separated from the sleeve and shaft after a short contact time when spot welding the shaft and sleeve, the components of the welding gun need to have the functions of telescopic and precise positioning. The components of this welding gun clamping are expensive, and the positioning accuracy of the welding gun decreases after a period of use, which affects the welding quality. Summary of the invention

[0005] The technical problem to be solved by the present invention is to reduce the equipment investment cost and improve the welding quality of the hand brake shaft automatic rotation welding tool.

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] The hand brake shaft automatic rotation welding tool comprises a bracket, a platform is fixed on the upper end of the bracket, clamping and rotating components are arranged on both sides of the platform, the two clamping and rotating components are symmetrically arranged, and a welding component is arranged on one side of the platform part between the two clamping and rotating components, and the welding component can weld and fix both ends of the sleeve to the shaft at the same time; the clamping and rotating component comprises a clamping unit and a rotating unit, the rotating unit is located on the platform inside the clamping unit, the rotating unit can drive the shaft to rotate, and a driving unit is slidably arranged on the platform on one side of the clamping unit, the driving unit is arranged on the same side as the sleeve, the clamping unit and the driving unit are connected through a transmission component, and after the clamping unit clamps the sleeve and the shaft, the rotating unit and the driving unit can respectively drive the shaft and the sleeve to rotate synchronously.

[0008] Specifically, the welding assembly includes a square tube, both ends of the square tube are provided with a clamp, and a welding gun is installed on the clamp; the clamp includes a fixed plate fixedly connected to the square tube, the fixed plate is fixed with a first telescopic rod, the telescopic end of the first telescopic rod is fixed with a sliding plate, the sliding plate is slidably connected to the fixed plate, the first connecting rod is fixed on the sliding plate, the axial direction of the first connecting rod is perpendicular to the movement direction of the sliding plate, the first connecting rod is detachably fixedly connected to the first mounting block, the first mounting block is detachably fixedly connected to the second connecting rod, the first connecting rod is perpendicular to the second connecting rod, the second connecting rod is detachably fixedly connected to the second mounting block, and the welding gun is detachably fixedly installed on the second mounting block; the lower end of the square tube is fixedly connected to the upper end of the second telescopic rod, the lower end of the second telescopic rod is rotatably connected to the rotating seat, the rotating seat is fixed on the platform, the first motor is fixed in the bracket, the first bevel gear is concentrically fixed on the output shaft of the first motor, the platform is rotatably connected with a rotating rod, the rotating rod is concentrically fixedly connected to the lower end of the second telescopic rod, the second bevel gear is fixed on the rotating rod, and the first bevel gear is meshed with the second bevel gear.

[0009] Specifically, the first connecting rod and the second connecting rod are respectively inserted into the two slots of the first mounting block, and the first mounting block is threaded with two locking bolts corresponding to the first connecting rod and the second connecting rod respectively. After locking the two locking bolts on the first mounting block, the first connecting rod and the second connecting rod can be clamped and fixed on the first mounting block; the second connecting rod and the welding gun are respectively inserted into the two slots of the second mounting block, and the second mounting block is threaded with two locking bolts corresponding to the second connecting rod and the welding gun respectively. After locking the two locking bolts on the second mounting block, the second connecting rod and the welding gun can be clamped and fixed on the second mounting block.

[0010] Specifically, the clamping unit includes two symmetrically arranged sliding frames, the sliding frames are in an inverted U shape, the vertical part of the sliding frames slides through the platform, an upper clamping plate is slidably arranged in the upper end of the sliding frame, the upper clamping plate and the sliding frame are connected by an upper spring, a lower clamping plate is slidably arranged in the sliding frame below the upper clamping plate, the lower end of the lower clamping plate is connected to the upper end of the platform by a lower spring, a plurality of vertical first guide rods are fixed to the upper end of the platform, the first guide rods pass through the limiting holes on the lower clamping plate, a second through hole corresponding to the first guide rod is opened on the upper clamping plate, and the middle part of the upper clamping plate is curved upward The middle part of the lower splint is bent downward in an arc shape, and a second make way hole corresponding to the arc-shaped part of the lower splint is opened on the platform, a first ball is installed in the arc-shaped part of the upper splint, and a second ball is installed in the arc-shaped part of the lower splint; a vertical rack is fixed on one side of the sliding frame, and the rack slides through the platform, and a second fixed seat is fixed at the lower end of the platform, and a main shaft is rotatably connected to the second fixed seat, and a gear ring corresponding to the rack is concentrically fixed on the main shaft, and the gear ring is meshed with the rack, and a third motor is fixed on the second fixed seat, and the output shaft of the third motor is concentrically fixedly connected to the main shaft.

[0011] Specifically, the rotating unit includes a first through hole opened on the platform, a first roller and a second roller are arranged in the first through hole, the first core shaft of the first roller is rotatably connected to the platform, the second core shaft of the second roller is rotatably connected to the platform, a first pulley and a second pulley are concentrically fixed on the first core shaft and the second core shaft respectively, and the first pulley and the second pulley are connected by a first belt transmission; a driven pulley is concentrically fixed on the second core shaft, a fourth motor is fixed at the lower end of the platform, a driving pulley is concentrically fixed on the output shaft of the fourth motor, and the driving pulley and the driven pulley are connected by a third belt transmission.

[0012] Specifically, the driving unit includes a slide groove opened at one end of the platform, the slide groove corresponds to the clamping unit, the length direction of the slide groove is perpendicular to the axial direction of the shaft rod, a moving seat is slidably arranged in the slide groove, a second guide rod is fixed in the slide groove, the moving seat is slidably connected to the second guide rod, a sliding seat is slidably arranged in the vertical direction of the upper end of the moving seat, the lower end of the sliding seat is connected to the moving seat by a third spring, a third roller is rotatably arranged on the upper end of the sliding seat, a second motor is fixed on the sliding seat, the output shaft of the second motor is concentrically and fixedly connected to the third roller, and the axis of the third roller is parallel to the axis of the shaft rod.

[0013] Specifically, the transmission assembly includes a screw rotatably connected to the platform, the screw passes through the movable seat, the screw is threadedly connected to the movable seat, a first clearance hole is opened on the platform, one end of the screw is located in the first clearance hole, a fourth pulley is concentrically fixed to one end of the screw in the first clearance hole, a first fixed seat is fixed to the lower end of the platform, a rotating shaft is rotatably connected to the first fixed seat, the rotating shaft is parallel to the screw, a third pulley is concentrically fixed to one end of the rotating shaft, the third pulley and the fourth pulley are connected through a second belt drive, a third bevel gear is concentrically fixed to the other end of the rotating shaft, a fourth bevel gear is concentrically fixed to the main shaft, and the fourth bevel gear is meshed with the third bevel gear.

[0014] Specifically, a top plate is fixed to an end of the upper end of the platform away from the welding assembly, and the top plate limits the axial position of the shaft rod.

[0015] Specifically, the bracket includes a bottom plate, a plurality of supporting legs are fixed to the upper end of the bottom plate, and the supporting legs are fixedly connected to the lower end of the platform.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This welding tool can limit the axial position of the shaft by fixing a top plate at one end of the platform, and can prevent the shaft from moving in the axial direction during its rotation.

[0018] 2. During welding, two welding guns can work at the same time, thereby simultaneously welding and fixing the two ends of the sleeve to the shaft rod, which can improve the welding efficiency of the sleeve and the shaft rod.

[0019] 3. The welding tool has two clamping and rotating assemblies, and the welding assembly is located between the two clamping and rotating assemblies. When the welding assembly is welding the shaft rod and sleeve assembly in one of the clamping and rotating assemblies, the other shaft rod and sleeve assembly can be clamped by the other clamping and rotating assembly, which can further improve the welding efficiency.

[0020] 4. When the shaft rotates, the second motor and the third roller can drive the sleeve to rotate, thereby making the sleeve and the shaft rotate synchronously, which can improve the welding quality of the shaft and the sleeve.

[0021] 5. The distance between the shaft and the welding gun can be adjusted, which is suitable for welding shafts and sleeves of different diameters and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the welding tooling.

[0023] Figure 2 It is a schematic diagram of the cooperation between the clamping rotating component and the welding component.

[0024] Figure 3 Schematic diagram of the welding assembly.

[0025] Figure 4 A schematic diagram of a sliding rod.

[0026] Figure 5 Schematic diagram of the lower splint.

[0027] Figure 6 This is a bottom view of the upper splint.

[0028] Figure 7 A schematic diagram of a drive unit.

[0029] Figure 8 It is a schematic diagram of the cooperation between the moving seat and the sliding seat.

[0030] Fig. 9 The schematic diagram of the main axis structure.

[0031] Fig.10 It is a schematic diagram of the cooperation between the first roller and the second roller.

[0032] Fig.11 for Fig.10 Magnified view of area A.

[0033] Fig.12 for Fig.10 Magnified view of area B.

[0034] The names of the parts in the attached drawings are: 1. bottom plate; 2. first motor; 3. supporting leg; 4. first bevel gear; 5. rotating rod; 6. second bevel gear; 7. bushing; 8. square tube; 9. sliding frame; 10. top plate; 11. rack; 12. first belt; 13. shaft rod; 14. first roller; 15. first telescopic rod; 16. upper clamping plate; 17. sliding plate; 18. first through hole; 19. first mandrel; 20. second roller; 21. fixed plate; 22. second telescopic rod; 23. rotating seat; 24. welding gun; 25. third bevel gear; 26. first fixed seat; 27. second belt; 28. third pulley; 29. ​​first give way hole; 30. locking bolt; 31. second mounting block; 32. second connecting rod; 33. first mounting block; 34, the first connecting rod; 35, the platform; 36, the upper spring; 37, the second through hole; 38, the first guide rod; 39, the lower clamp; 40, the second clearance hole; 41, the lower spring; 42, the limit hole; 43, the first ball; 44, the second ball; 45, the second guide rod; 46, the lead screw; 47, the slide; 48, the moving seat; 49, the fourth bevel gear; 50, the fourth pulley; 51, the sliding seat; 52, the third roller; 53, the second motor; 54, the driven pulley; 55, the third spring; 56, the third motor; 57, the gear ring; 58, the main shaft; 59, the second fixed seat; 60, the fourth motor; 61, the third belt; 62, the driving pulley; 63, the rotating shaft; 64, the second pulley; 65, the first pulley; 66, the second spindle. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] like Figure 1-Figure 12 As shown, the hand brake shaft automatic rotation welding tool comprises a bracket, and a platform 35 is fixed on the upper end of the bracket. Specifically, the bracket comprises a bottom plate 1, and a plurality of supporting legs 3 are fixed on the upper end of the bottom plate 1, and the supporting legs 3 are fixedly connected to the lower end of the platform 35.

[0037] The two sides of the platform 35 are provided with clamping and rotating components, and the two clamping and rotating components are symmetrically arranged. A welding component is provided on one side of the platform 35 between the two clamping and rotating components, and the welding component can simultaneously weld and fix the two ends of the sleeve 7 to the shaft rod 13.

[0038] The clamping and rotating assembly includes a clamping unit and a rotating unit. The rotating unit is located on a platform 35 inside the clamping unit. The rotating unit can drive the shaft 13 to rotate.

[0039] A driving unit is slidably arranged on the platform 35 on one side of the clamping unit. The driving unit is arranged on the same side as the sleeve 7. The clamping unit and the driving unit are connected through a transmission assembly. After the clamping unit clamps the sleeve 7 and the shaft rod 13, the rotating unit and the driving unit can respectively drive the shaft rod 13 and the sleeve 7 to rotate synchronously.

[0040] Specifically, a top plate 10 is fixed to an end of the upper end of the platform 35 away from the welding assembly, and the top plate 10 limits the axial position of the shaft 13 .

[0041] like Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the clamping unit includes two symmetrically arranged sliding frames 9, the sliding frames 9 are in an inverted U shape, and the vertical part of the sliding frames 9 slides through the platform 35. An upper clamping plate 16 is slidably arranged in the upper end of the sliding frame 9, and the upper clamping plate 16 is connected to the sliding frame 9 through an upper spring 36. A lower clamping plate 39 is slidably arranged in the sliding frame 9 below the upper clamping plate 16, and the lower end of the lower clamping plate 39 is connected to the upper end of the platform 35 through a lower spring 41. A plurality of vertical first guide rods 38 are fixed to the upper end of the platform 35, and the first guide rods 38 pass through the limiting holes 42 on the lower clamping plate 39, and the upper clamping plate 16 is provided with second through holes 37 corresponding to the first guide rods 38.

[0042] The middle part of the upper clamping plate 16 is curved upward, and the middle part of the lower clamping plate 39 is curved downward. A second clearance hole 40 corresponding to the curved part of the lower clamping plate 39 is provided on the platform 35. A first ball 43 is installed in the curved part of the upper clamping plate 16, and a second ball 44 is installed in the curved part of the lower clamping plate 39.

[0043] A vertical rack 11 is fixed to one side of the sliding frame 9, and the rack 11 slides through the platform 35. A second fixed seat 59 is fixed to the lower end of the platform 35, and a main shaft 58 is rotatably connected to the second fixed seat 59. A gear ring 57 corresponding to the rack 11 is concentrically fixed to the main shaft 58, and the gear ring 57 is meshed with the rack 11. A third motor 56 is fixed to the second fixed seat 59, and the output shaft of the third motor 56 is concentrically fixedly connected to the main shaft 58.

[0044] like Figure 1 , Figure 2 and Fig.10 As shown, the rotating unit includes a first through hole 18 opened on the platform 35, and a first roller 14 and a second roller 20 are arranged in the first through hole 18. The first spindle 19 of the first roller 14 is rotatably connected to the platform 35, and the second spindle 66 of the second roller 20 is rotatably connected to the platform 35.

[0045] like Fig.12As shown, a first pulley 65 and a second pulley 64 are concentrically fixed on the first mandrel 19 and the second mandrel 66 , respectively, and the first pulley 65 and the second pulley 64 are connected through the first belt 12 .

[0046] like Fig.11 As shown, a driven pulley 54 is coaxially fixed on the second core shaft 66, a fourth motor 60 is fixed at the lower end of the platform 35, a driving pulley 62 is coaxially fixed on the output shaft of the fourth motor 60, and the driving pulley 62 and the driven pulley 54 are connected through a third belt 61.

[0047] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the driving unit includes a slide groove 47 opened at one end of the platform 35, the slide groove 47 corresponds to the clamping unit, and the length direction of the slide groove 47 is perpendicular to the axial direction of the shaft 13. A moving seat 48 is slidably arranged in the slide groove 47, and a second guide rod 45 is fixed in the slide groove 47, and the moving seat 48 is slidably connected to the second guide rod 45.

[0048] A sliding seat 51 is slidably arranged on the upper end of the moving seat 48 in the vertical direction, and the lower end of the sliding seat 51 is connected to the moving seat 48 through a third spring 55. A third roller 52 is rotatably arranged on the upper end of the sliding seat 51, and a second motor 53 is fixed on the sliding seat 51. The output shaft of the second motor 53 is concentrically fixedly connected to the third roller 52, and the axis of the third roller 52 is parallel to the axis of the shaft 13.

[0049] like Figure 7 and Fig. 9 As shown, the transmission assembly includes a lead screw 46 rotatably connected to the platform 35, the lead screw 46 passes through the movable seat 48, the lead screw 46 is threadedly connected to the movable seat 48, a first clearance hole 29 is opened on the platform 35, one end of the lead screw 46 is located in the first clearance hole 29, a fourth pulley 50 is concentrically fixed to one end of the lead screw 46 in the first clearance hole 29, a first fixed seat 26 is fixed to the lower end of the platform 35, a rotating shaft 63 is rotatably connected to the first fixed seat 26, the rotating shaft 63 is parallel to the lead screw 46, a third pulley 28 is concentrically fixed to one end of the rotating shaft 63, the third pulley 28 and the fourth pulley 50 are connected through the second belt 27 for transmission, a third bevel gear 25 is concentrically fixed to the other end of the rotating shaft 63, a fourth bevel gear 49 is concentrically fixed to the main shaft 58, and the fourth bevel gear 49 is meshed with the third bevel gear 25.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, the welding assembly includes a square tube 8, both ends of the square tube 8 are provided with clamps, and welding guns 24 are installed on the clamps.

[0051] The clamp includes a fixed plate 21 fixedly connected to the square tube 8, a first telescopic rod 15 is fixed on the fixed plate 21, a sliding plate 17 is fixed on the telescopic end of the first telescopic rod 15, the sliding plate 17 is slidably connected to the fixed plate 21, a first connecting rod 34 is fixed on the sliding plate 17, the axial direction of the first connecting rod 34 is perpendicular to the movement direction of the sliding plate 17, a first mounting block 33 is detachably fixedly connected to the first connecting rod 34, a second connecting rod 32 is detachably fixedly connected to the first mounting block 33, the first connecting rod 34 is perpendicular to the second connecting rod 32, a second connecting rod 32 is detachably fixedly connected to the second mounting block 31, and the welding gun 24 is detachably fixedly mounted on the second mounting block 31.

[0052] Specifically, the first connecting rod 34 and the second connecting rod 32 are respectively inserted into the two grooves of the first mounting block 33, and the first mounting block 33 is threaded with two locking bolts 30 corresponding to the first connecting rod 34 and the second connecting rod 32 respectively. After locking the two locking bolts 30 on the first mounting block 33, the first connecting rod 34 and the second connecting rod 32 can be clamped and fixed on the first mounting block 33.

[0053] Specifically, the second connecting rod 32 and the welding gun 24 are respectively inserted into the two slots of the second mounting block 31, and the second mounting block 31 is threadedly connected with two locking bolts 30 corresponding to the second connecting rod 32 and the welding gun 24, respectively. After locking the two locking bolts 30 on the second mounting block 31, the second connecting rod 32 and the welding gun 24 can be clamped and fixed on the second mounting block 31.

[0054] The lower end of the square tube 8 is fixedly connected to the upper end of the second telescopic rod 22, the lower end of the second telescopic rod 22 is rotatably connected to the rotating seat 23, the rotating seat 23 is fixed on the platform 35, the first motor 2 is fixed in the bracket, the first bevel gear 4 is concentrically fixed on the output shaft of the first motor 2, the platform 35 is rotatably connected with a rotating rod 5, the rotating rod 5 is concentrically fixedly connected to the lower end of the second telescopic rod 22, the second bevel gear 6 is fixed on the rotating rod 5, and the first bevel gear 4 is meshed with the second bevel gear 6.

[0055] Working principle: Figure 1 and Figure 2 As shown, before welding, the sleeve 7 is sleeved on the shaft 13, and then the shaft 13 passes through the two sliding frames 9 of the clamping unit, and the sleeve 7 is located in the sliding frame 9 close to the welding assembly. The position of the sleeve 7 on the shaft 13 is adjusted so that the sleeve 7 is located at the set welding position.

[0056] After the shaft rod 13 passes through the two sliding frames 9 of the clamping unit, the shaft rod 13 is located between the first roller 14 and the second roller 20. At the same time, the first roller 14 and the second roller 20 can support the shaft rod 13.

[0057] Then the third motor 56 is started, so that the third motor 56 drives the main shaft 58 and the gear ring 57 to rotate. When the main shaft 58 and the gear ring 57 rotate, the cooperation between the gear ring 57 and the rack 11 causes the sliding frame 9 to move downward.

[0058] During the downward movement of the sliding frame 9, the arcuate portion of the upper clamping plate 16 and the arcuate portion of the lower clamping plate 39 approach each other. As the sliding frame 9 continues to move downward, the upper spring 36 and the lower spring 41 are compressed, and the first guide rod 38 passes through the second through hole 37 of the upper clamping plate 16. At this time, the upper clamping plate 16 and the lower clamping plate 39 in the left sliding frame 9 clamp the shaft rod 13, and the upper clamping plate 16 and the lower clamping plate 39 in the right sliding frame 9 clamp the shaft sleeve 7.

[0059] Since the first ball 43 is installed in the arc portion of the upper clamping plate 16 and the second ball 44 is installed in the arc portion of the lower clamping plate 39, the shaft rod 13 and the sleeve 7 can rotate after being clamped by the upper clamping plate 16 and the lower clamping plate 39.

[0060] During the rotation of the main shaft 58, the fourth bevel gear 49 and the third bevel gear 25 drive the rotating shaft 63 to rotate. During the rotation of the rotating shaft 63, the third pulley 28, the second belt 27 and the fourth pulley 50 drive the lead screw 46 to rotate. When the lead screw 46 rotates, it drives the moving seat 48, the sliding seat 51, the second motor 53 and the third roller 52 to move toward the sleeve 7. When the shaft 13 and the sleeve 7 are clamped, the third roller 52 is pressed against the sleeve 7.

[0061] like Fig.11 and Fig.12 As shown, after the fourth motor 60 is started, the fourth motor 60 drives the second mandrel 66 and the second roller 20 to rotate through the driving pulley 62, the third belt 61 and the driven pulley 54. When the second mandrel 66 rotates, the first mandrel 19 and the first roller 14 are driven to rotate through the second pulley 64, the first belt 12 and the first pulley 65, and the shaft 13 can rotate when the first roller 14 and the second roller 20 rotate.

[0062] The second motor 53 is started, and the second motor 53 drives the third roller 52 to rotate, and the third roller 52 drives the sleeve 7 to rotate. The speed and direction of the second motor 53 are adjusted, so that the sleeve 7 and the shaft rod 13 can be controlled to rotate synchronously.

[0063] like Figure 1 , Figure 2 and Figure 3 As shown, after the position of the sleeve 7 on the shaft 13 is determined, the locking bolt 30 on the first mounting block 33 is loosened, and then the height of the second mounting block 31 in the axial direction of the second connecting rod 32 and the height of the second mounting block 31 in the axial direction of the first connecting rod 34 are adjusted, so that the two welding guns 24 correspond to the two ends of the sleeve 7 respectively, and then the locking bolt 30 on the first mounting block 33 is locked.

[0064] The first telescopic rod 15 is activated, so that the sliding plate 17 is brought close to the shaft rod 13 and the shaft sleeve 7 , thereby adjusting the distance between the welding gun 24 and the shaft sleeve 7 and the shaft rod 13 .

[0065] After the position adjustment of the welding gun 24 is completed, the shaft 13 and the sleeve 7 can be rotated synchronously, and the two welding guns 24 are started, and the two welding guns 24 can simultaneously weld and fix the two ends of the sleeve 7 on the shaft 13. The welding process of the sleeve 7 and the shaft 13 is not interrupted, which can improve the welding efficiency and welding quality.

[0066] like Figure 1 and Figure 2 As shown, in this embodiment, when welding the shaft rod 13 and the sleeve 7 in the front clamping unit, the shaft rod 13 and the sleeve 7 can be placed in the rear clamping unit, and the rear clamping unit can be used to clamp the rear shaft rod 13 and the sleeve 7.

[0067] After the welding of the shaft rod 13 and the sleeve 7 on the front side is completed, the second telescopic rod 22 is started to extend the second telescopic rod 22, thereby causing the square tube 8 and the components thereon to move upward, and then the first motor 2 is started, and the first motor 2 rotates the second telescopic rod 22, the square tube 8 and the components thereon by 180 degrees through the first bevel gear 4, the second bevel gear 6 and the rotating rod 5, and then the second telescopic rod 22 is restored, and then the shaft rod 13 and the sleeve 7 on the rear side are rotated synchronously and the two welding guns 24 are started, and then the two welding guns 24 can be used to weld the shaft rod 13 and the sleeve 7 on the rear side. At this time, the front clamping unit can release the rotating rod 5 and the sleeve 7 on the front side, and the welded shaft rod 13 and the sleeve 7 can be removed, thereby improving the welding efficiency of the welding tool.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hand brake shaft automatic rotation welding tool, comprising a bracket, a platform (35) is fixed on the upper end of the bracket, characterized in that: A clamping and rotating assembly is provided on both sides of the platform (35), and the two clamping and rotating assemblies are symmetrically arranged. A welding assembly is provided on one side of the platform (35) between the two clamping and rotating assemblies, and the welding assembly can simultaneously weld and fix the two ends of the sleeve (7) to the shaft rod (13); the clamping and rotating assembly comprises a clamping unit and a rotating unit, and the rotating unit is located on the platform (35) inside the clamping unit, and the rotating unit can drive the shaft rod (13) to rotate. A driving unit is slidably arranged on the platform (35) on one side of the clamping unit, and the driving unit is arranged on the same side as the sleeve (7). The clamping unit and the driving unit are connected via a transmission assembly. After the clamping unit clamps the sleeve (7) and the shaft rod (13), the rotating unit and the driving unit can respectively drive the shaft rod (13) and the sleeve (7) to rotate synchronously. The clamping unit comprises two symmetrically arranged sliding frames (9), the sliding frames (9) are in an inverted U shape, the vertical part of the sliding frames (9) slides through the platform (35), an upper clamping plate (16) is slidably arranged in the upper end of the sliding frame (9), the upper clamping plate (16) and the sliding frame (9) are connected by an upper spring (36), a lower clamping plate (39) is slidably arranged in the sliding frame (9) below the upper clamping plate (16), the lower end of the lower clamping plate (39) is connected to the upper end of the platform (35) by a lower spring (41), a plurality of vertical first guide rods (38) are fixed to the upper end of the platform (35), the first guide rods (38) penetrate the limiting holes (42) on the lower clamping plate (39), a second through hole (37) corresponding to the first guide rod (38) is opened on the upper clamping plate (16), the middle part of the upper clamping plate (16) is curved upward, and the lower clamping plate (39) is connected to the upper end of the platform (35) by a lower spring (41), and the upper end of the platform (35) is fixed with a plurality of vertical first guide rods (38), the first guide rods (38) penetrate the limiting holes (42) on the lower clamping plate (39), the upper clamping plate (16) is provided with a second through hole (37) corresponding to the first guide rod (38), the middle part of the upper clamping plate (16) is curved upward, and the lower clamping plate (39) is connected to the upper end of the platform (35) by a lower spring (41). 9) is curved downward in the middle, a second clearance hole (40) corresponding to the arc portion of the lower clamping plate (39) is opened on the platform (35), a first ball (43) is installed in the arc portion of the upper clamping plate (16), and a second ball (44) is installed in the arc portion of the lower clamping plate (39); a vertical rack (11) is fixed on one side of the sliding frame (9), the rack (11) slides through the platform (35), a second fixed seat (59) is fixed at the lower end of the platform (35), a main shaft (58) is rotatably connected to the second fixed seat (59), a toothed ring (57) corresponding to the rack (11) is coaxially fixed on the main shaft (58), the toothed ring (57) is meshed with the rack (11), a third motor (56) is fixed on the second fixed seat (59), and the output shaft of the third motor (56) is coaxially fixedly connected to the main shaft (58); The driving unit comprises a slide groove (47) provided at one end of the platform (35), the slide groove (47) corresponding to the clamping unit, the length direction of the slide groove (47) being perpendicular to the axial direction of the shaft (13), a movable seat (48) being slidably arranged in the slide groove (47), a second guide rod (45) being fixed in the slide groove (47), the movable seat (48) being slidably connected to the second guide rod (45), a sliding seat (51) being slidably arranged in the vertical direction of the upper end of the movable seat (48), the lower end of the sliding seat (51) being connected to the movable seat (48) by a third spring (55), a third roller (52) being rotatably arranged at the upper end of the sliding seat (51), a second motor (53) being fixed on the sliding seat (51), an output shaft of the second motor (53) being concentrically fixedly connected to the third roller (52), and an axis of the third roller (52) being parallel to an axis of the shaft (13); The transmission assembly comprises a lead screw (46) rotatably connected to the platform (35), the lead screw (46) passes through the movable seat (48), the lead screw (46) and the movable seat (48) are threadedly connected, a first clearance hole (29) is opened on the platform (35), one end of the lead screw (46) is located in the first clearance hole (29), a fourth pulley (50) is coaxially fixed to one end of the lead screw (46) in the first clearance hole (29), the first fixed seat (26) is fixed at the lower end of the platform (35), and the fourth pulley (50) is fixed to the first fixed seat (26) at the lower end of the platform (35). A rotating shaft (63) is rotatably connected to a fixed seat (26), the rotating shaft (63) is parallel to the lead screw (46), a third pulley (28) is coaxially fixed to one end of the rotating shaft (63), the third pulley (28) is connected to a fourth pulley (50) through a second belt (27), a third bevel gear (25) is coaxially fixed to the other end of the rotating shaft (63), a fourth bevel gear (49) is coaxially fixed to the main shaft (58), and the fourth bevel gear (49) is meshed with the third bevel gear (25).

2. The hand brake shaft automatic rotation welding tool according to claim 1 is characterized in that: The welding assembly comprises a square tube (8), both ends of the square tube (8) are provided with a clamp, and a welding gun (24) is installed on the clamp; the clamp comprises a fixed plate (21) fixedly connected to the square tube (8), a first telescopic rod (15) is fixed on the fixed plate (21), a sliding plate (17) is fixed on the telescopic end of the first telescopic rod (15), the sliding plate (17) is slidably connected to the fixed plate (21), a first connecting rod (34) is fixed on the sliding plate (17), the axial direction of the first connecting rod (34) is perpendicular to the movement direction of the sliding plate (17), a first mounting block (33) is detachably fixedly connected to the first connecting rod (34), a second connecting rod (32) is detachably fixedly connected to the first mounting block (33), and the first connecting rod (34) is detachably fixedly connected to the second connecting rod (32). The rod (32) is vertical, the second connecting rod (32) is detachably fixedly connected to the second mounting block (31), and the welding gun (24) is detachably fixedly mounted on the second mounting block (31); the lower end of the square tube (8) is fixedly connected to the upper end of the second telescopic rod (22), the lower end of the second telescopic rod (22) is rotatably connected to the rotating seat (23), the rotating seat (23) is fixed on the platform (35), a first motor (2) is fixed in the bracket, a first bevel gear (4) is coaxially fixed on the output shaft of the first motor (2), a rotating rod (5) is rotatably connected to the platform (35), the rotating rod (5) is coaxially fixedly connected to the lower end of the second telescopic rod (22), a second bevel gear (6) is fixed on the rotating rod (5), and the first bevel gear (4) is meshed with the second bevel gear (6).

3. The hand brake shaft automatic rotation welding tool according to claim 2 is characterized in that: The first connecting rod (34) and the second connecting rod (32) are respectively inserted into the two notches of the first mounting block (33); the first mounting block (33) is threadedly connected with two locking bolts (30) respectively corresponding to the first connecting rod (34) and the second connecting rod (32); after the two locking bolts (30) on the first mounting block (33) are locked, the first connecting rod (34) and the second connecting rod (32) can be clamped and fixed on the first mounting block (33); the second connecting rod (32) and the welding gun (24) are respectively inserted into the two notches of the second mounting block (31); the second mounting block (31) is threadedly connected with two locking bolts (30) respectively corresponding to the second connecting rod (32) and the welding gun (24); after the two locking bolts (30) on the second mounting block (31) are locked, the second connecting rod (32) and the welding gun (24) can be clamped and fixed on the second mounting block (31).

4. The hand brake shaft automatic rotation welding tool according to claim 1 is characterized in that: The rotating unit comprises a first through hole (18) opened on the platform (35), a first roller (14) and a second roller (20) are arranged in the first through hole (18), a first core shaft (19) of the first roller (14) is rotationally connected to the platform (35), a second core shaft (66) of the second roller (20) is rotationally connected to the platform (35), a first pulley (65) and a second pulley (64) are coaxially fixed on the first core shaft (19) and the second core shaft (66), respectively, and the first pulley (65) and the second pulley (64) are connected by a first belt (12); a driven pulley (54) is coaxially fixed on the second core shaft (66), a fourth motor (60) is fixed at the lower end of the platform (35), a driving pulley (62) is coaxially fixed on the output shaft of the fourth motor (60), and the driving pulley (62) and the driven pulley (54) are connected by a third belt (61).

5. The hand brake shaft automatic rotation welding tool according to claim 1 is characterized in that: A top plate (10) is fixed to the upper end of the platform (35) away from the welding assembly, and the top plate (10) limits the axial position of the shaft rod (13).

6. The hand brake shaft automatic rotation welding tool according to claim 1 is characterized in that: The bracket comprises a base plate (1), a plurality of supporting legs (3) are fixed to the upper end of the base plate (1), and the supporting legs (3) are fixedly connected to the lower end of the platform (35).

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