Laser welding auxiliary device for automobile single-cylinder shock absorber

Abstract

The invention relates to the technical field of single-cylinder shock absorbers, in particular to a laser welding auxiliary device for an automobile single-cylinder shock absorber, which comprises a welding platform, and the inner side surface of the welding platform is provided with a clockwise and anticlockwise adjusting shaft for adjusting an efficiency or precision mode. The top surface of the clockwise and anticlockwise adjusting shaft is provided with an input laser welding head angular velocity welding installation arm, and the bottom surface of the clockwise and anticlockwise adjusting shaft is provided with a continuously variable transmission for adjusting the output angular velocity of the welding installation arm. One end of the continuously variable transmission is provided with a driven clamping disc which is used for clamping and adjusting the relative rotating speed through the rotating speed difference of the welding installation arms, the outer side surface of the driven clamping disc is provided with a radial adjusting part for adjusting the transmission ratio according to the radial size, and the outer side surface of the driven clamping disc is provided with a wall thickness adjusting part for adjusting the transmission ratio according to the wall thickness. An adaptive reset piece used for resetting is arranged on the inner side surface of the driven clamping disc, the relative rotation angle is adjusted by changing the transmission ratio and the rotation direction, and rapid and fine welding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of monotube shock absorbers, in particular to a laser welding auxiliary device for automobile monotube shock absorbers. Background Art

[0002] Laser welding for monotube shock absorbers is an advanced manufacturing process. Laser welding boasts high speed, a minimal heat-affected zone, and high precision. In the production of monotube shock absorbers, it precisely and securely welds the various components together. The laser beam's highly concentrated energy, after being focused, easily penetrates the shock absorber tubing, achieving a secure weld. Furthermore, the welding process can be easily automated, significantly improving production efficiency. Compared to traditional welding methods, laser welding effectively reduces deformation, ensuring the dimensional accuracy and performance stability of the shock absorber, playing a significant role in improving the quality and service life of monotube shock absorbers.

[0003] When welding a monotube shock absorber, existing welding equipment may require the welding arm to rotate a large angle to complete the process. This not only takes up more space, but also limits the flexibility of the equipment in space-constrained welding scenarios, such as in compact equipment layouts on production lines. Furthermore, for areas requiring precision welding, a longer travel distance is required to achieve multiple, fine welds, and manual operation is difficult to achieve with a small rotation angle, making it difficult to use.

[0004] In view of this, we proposed a laser welding auxiliary device for automobile monotube shock absorber. Summary of the Invention

[0005] The object of the present invention is to provide a laser welding auxiliary device for a mono-tube shock absorber of an automobile, so as to solve the problem that the existing laser welding auxiliary device proposed in the above background technology is difficult to obtain a fine rotation angle by manual operation and requires a larger rotation angle. In order to achieve the above object, the present invention provides the following technical solution: A laser welding auxiliary device for a mono-tube shock absorber of an automobile, comprising a welding platform, the top surface of the welding platform is fixedly connected to a welding base, the outer surface of the welding platform is fixedly connected to a side shell, the inner surface of the welding platform is provided with a forward and reverse adjustment shaft, the top surface of the forward and reverse adjustment shaft is provided with a welding mounting arm, the bottom surface of the forward and reverse adjustment shaft is provided with a continuously variable transmission, one end of the continuously variable transmission is provided with a driven clamping disk, the outer surface of the driven clamping disk is provided with a radial adjustment member, the outer surface of the driven clamping disk is provided with a wall thickness adjustment member, and the inner surface of the driven clamping disk is provided with an adaptive reset member.

[0006] Preferably, the forward and reverse adjustment shaft includes a control rod, the outer surface of the control rod is fixedly connected to the output gear, the bottom surface of the control rod is fixedly connected to the connecting shaft, and the bottom surface of the connecting shaft is slidably connected to the direction-changing gear set; There are two output gears, and the direction-changing gear set consists of two bevel gears meshing with each other, and the inner surface of the top bevel gear is slidably connected to the connecting shaft.

[0007] Preferably, the welding mounting arm includes an active rotating arm, the active rotating arm is rotatably connected to the welding platform, an outer surface of the active rotating arm is fixedly connected to an input gear, the other side surface of the active rotating arm is fixedly connected to a longitudinal moving shaft, the outer surface of the longitudinal moving shaft is slidably connected to a longitudinal moving block, and the outer surface of the longitudinal moving block is slidably connected to a welding mounting clamp; The input gear meshes with the output gear.

[0008] Preferably, the continuously variable transmission includes an input shaft, the input shaft is rotatably connected to the inner surface of the welding base, the outer surface of the input shaft is fixedly connected to a fixed gear, the top surface of the fixed gear is meshed with a movable gear, the inner surface of the movable gear is slidably connected to a lifting gear shaft, one end of the lifting gear shaft is fixedly connected to a universal coupling, the other end of the universal coupling is fixedly connected to a connecting sprocket, and the outer surface of the connecting sprocket is sleeved with a connecting chain; One end of the input shaft is fixedly connected to the bevel gear at the bottom of the direction-changing gear set, the lifting gear shaft is slidingly connected to the inner surface of the welding base, and there are two connecting sprockets, both of which are rotatably connected to the welding platform.

[0009] Preferably, the driven clamping disc includes a chuck rotating shaft, the chuck rotating shaft is rotatably connected to the welding platform, the outer surface of the chuck rotating shaft is fixedly connected to the chuck base, the outer surface of the chuck base is provided with a limiting groove, the outer surface of the chuck base is rotatably connected to an electric cam, the outer surface of the electric cam is hingedly connected to four annularly distributed connecting arms, the other end of the connecting arm is hingedly connected to a movable clamping claw, and the outer surface of the chuck base is fixedly connected to a chuck end cover; The chuck shaft is fixedly connected to the connecting sprocket, the number of the limiting grooves is four and they are distributed in a ring on the chuck base and the chuck end cover, the movable jaws are slidably connected to the inner surface of the limiting groove, and the number of the movable jaws is three.

[0010] Preferably, the radial adjustment member includes a driven push column, the driven push column is slidably connected to the inner surface of the side shell, the outer surface of the driven push column is fixedly connected to an oblique limiting plate A, the outer surface of the oblique limiting plate A is slidably connected to a driven push-pull clamp A, the outer surface of the driven push-pull clamp A is fixedly connected to an outer movable seat, the inner surface of the outer movable seat is slidably connected to an inner movable seat, and the outer surface of the inner movable seat is fixedly connected to a push clamping arm; The driven push column contacts the movable clamping claw, and the pushing clamping arm is slidably connected with the movable gear.

[0011] The outer surface of the sliding panel also is connected with the upper end of the sliding panel, and the inner surface of the sliding panel is connected with the up-down knob. The sliding panel also is connected with the up-down knob. The upper end of the sliding panel also is connected with the up-down knob. The other end of the inner support spring is fixedly connected to the inner surface of the end mounting groove, the outer clamping block is hinged to the connecting arm, the follower base is slidably connected to the outer movable seat, and the driven push-pull clamp B is fixedly connected to the inner movable seat.

[0012] Preferably, the adaptive reset member includes a speed regulating gear, the speed regulating gear is rotatably connected to the chuck end cover, the inner surface of the end mounting groove is slidably connected to a speed lever, the outer surface of the speed lever is fixedly connected to a support block hook, and the inner surface of the end mounting groove is slidably connected to an original speed lever; The support block hook contacts the outer surface of the inner support block, the speed rod and the support block hook pass through the outer clamping block, the original speed rod is fixedly connected to the movable clamping claw on the opposite side of the outer clamping block, and the speed regulating gear consists of two gears with a pitch circle ratio of one to two, and the two gears are respectively engaged with the original speed rod and the speed rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, through the mutual cooperation of the forward and reverse adjustment shaft, the welding mounting arm, the continuously variable transmission, and the driven clamping plate, the laser welding head and the clamped monocular shock absorber rotate synchronously. The laser welding head can perform annular welding around the monocular shock absorber, and the driven clamping plate rotates with the welding mounting arm. When rotating in the opposite direction, the welding mounting arm only needs to rotate half a circle to completely weld the clamped monocular shock absorber, thereby reducing the required rotation radius of the welding mounting arm.

[0014] In the present invention, the rotation direction and rotation transmission ratio between the welding mounting arm and the driven clamping plate are adjusted by the mutual cooperation of the forward and reverse adjustment shafts and the continuously variable transmission. During welding, if fast welding is required, the forward and reverse adjustment shafts can be adjusted to make the two rotate in opposite directions, and the rotation speed of the driven clamping plate can be appropriately increased through the continuously variable transmission. In this way, when the welding mounting arm rotates a certain angle, the driven clamping plate can rotate a larger angle, and the relative rotation angle is the sum of the two, thereby improving the welding efficiency; and in the fine welding mode, the two can be adjusted to rotate in the same direction, and the relative rotation angle is the difference between the two, and the rotation speed of the driven clamping plate can be reduced through the continuously variable transmission, so that the relative rotation angle of the welding mounting arm and the driven clamping plate is smaller, which is convenient for precise control of the welding position.

[0015] In the present invention, the optimization of welding speed and heat distribution is achieved through the mutual cooperation of the radial adjustment part and the wall thickness adjustment part. For single-tube shock absorbers with different radial dimensions or thicknesses, the transmission ratio is adaptively adjusted to control the time required for welding and obtain the heat requirements required for welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic side view of the overall structure of the present invention; Figure 2 A is a side view schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the structure of the forward and reverse adjustment shaft and the welding installation arm cooperating with each other in the present invention; Figure 4 This is a schematic diagram of the structure of the mutual cooperation of the components of the forward and reverse adjustment shaft of the present invention; Figure 5 This is a schematic diagram of the structure of the forward and reverse adjustment shaft, welding mounting arm, continuously variable transmission, and driven clamping plate cooperating with each other in the present invention; Figure 6 This is a schematic diagram of the structure of the various components of the driven clamping disk of the present invention cooperating with each other; Figure 7 An exploded view of the driven clamping disc of the present invention; Figure 8 This is a schematic diagram of the structure of the electric cam, connecting arm, and movable clamping claw cooperating with each other in the present invention; Figure 9 FIG. B is a schematic side view of the internal structure of the present invention; Figure 10 This is a schematic diagram of the structure of the radial adjustment member of the present invention cooperating with each other; Figure 11 A schematic diagram of the structure of the wall thickness adjusting member and the driven clamping disk cooperating with each other in the present invention; Figure 12 This is a schematic diagram of the structure of the various components of the wall thickness adjusting piece of the present invention cooperating with each other; Figure 13 This is a schematic diagram of the structure of the push oblique block and the driven oblique push block cooperating with each other in the present invention; Figure 14 This is a schematic diagram of the structure of the wall thickness adjusting member and the radial adjusting member cooperating with each other in the present invention; Figure 15 This is a schematic diagram of the structure of the extension arm, the oblique limiting plate B, the driven push-pull clamp B, and the inner movable seat cooperating with each other in the present invention; Figure 16 This is a schematic diagram of the structure of the driven oblique push block, the movable base, and the follower base cooperating with each other in the present invention; Figure 17 This is a schematic diagram of the structure of the push horizontal block and the driven oblique push block cooperating with each other in the present invention; Figure 18 Schematic diagram A of the structure of the adaptive reset member of the present invention in cooperation with each other; Figure 19 Schematic diagram B of the structure of the mutual cooperation of the components of the adaptive reset member of the present invention; Figure 20 This is a schematic diagram of the structure in which the speed regulating gear, the multiplying speed lever and the original speed lever cooperate with each other in the present invention.

[0017] In the figure: 1. Welding platform; 11. Welding base; 12. Side housing; 2. Clockwise and counterclockwise adjustment shaft; 21. Control lever; 22. Output gear; 23. Connecting shaft; 24. Direction-changing gear set; 3. Welding mounting arm; 31. Active rotating arm; 311. Input gear; 32. Longitudinal moving shaft; 321. Longitudinal moving block; 33. Welding mounting clamp; 4. CVT; 41. Input shaft; 42. Fixed gear; 43. Movable gear; 431. Lifting gear shaft; 44. Universal coupling; 45. Connecting sprocket; 451. Connecting chain; 5. Driven clamping disc; 51. Clamping disc rotating shaft; 52. Clamping disc base; 521. Limiting groove; 53. Electric cam; 531. Connecting arm; 5 4. Movable clamping jaw; 55. Chuck end cover; 6. Radial adjustment member; 61. Driven push column; 62. Oblique limit plate A; 621. Driven push-pull clamp A; 63. Outer movable seat; 64. Inner movable seat; 65. Push clamping arm; 7. Wall thickness adjustment member; 71. End mounting groove; 72. Inner support block; 721. Inner support spring; 73. Outer clamping block; 74. Articulated arm; 741. Push oblique block; 75. Driven oblique push block; 751. Moving base; 752. Push cross block; 76. Follower base; 761. Extension arm; 77. Oblique limit plate B; 78. Driven push-pull clamp B; 8. Adaptive reset member; 81. Speed regulating gear; 82. Speed lever; 821. Support block hook; 83. Original speed lever. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] See also Figures 1 to 20 The present invention provides a technical solution: a laser welding auxiliary device for a monotube shock absorber of an automobile, comprising a welding platform 1, a welding base 11 being fixedly connected to the top surface of the welding platform 1, a side shell 12 being fixedly connected to the outer surface of the welding platform 1, a forward and reverse adjusting shaft 2 being provided on the inner surface of the welding platform 1, a welding mounting arm 3 being provided on the top surface of the forward and reverse adjusting shaft 2, a continuously variable transmission 4 being provided on the bottom surface of the forward and reverse adjusting shaft 2, a driven clamping disk 5 being provided on one end of the continuously variable transmission 4, a radial adjusting part 6 being provided on the outer surface of the driven clamping disk 5, a wall thickness adjusting part 7 being provided on the outer surface of the driven clamping disk 5, and an adaptive reset part 8 being provided on the inner surface of the driven clamping disk 5.

[0020] The forward and reverse adjustment shaft 2 includes a control rod 21, the outer surface of the control rod 21 is fixedly connected to the output gear 22, the bottom surface of the control rod 21 is fixedly connected to the connecting shaft 23, and the bottom surface of the connecting shaft 23 is slidably connected to the direction-changing gear set 24; There are two output gears 22, and the direction-changing gear set 24 is composed of two bevel gears meshing with each other, and the inner surface of the top bevel gear is slidably connected to the connecting shaft 23; By adjusting the setting of the clockwise and counterclockwise adjustment shaft 2, during use, both output gears 22 can mesh with the input gear 311, but there is a gap between the two output gears 22, and only one output gear 22 can mesh with the input gear 311 at the same time. The meshed output gear 22 is selected by adjusting the height of the control rod 21. When the active rotating arm 31 rotates, one of the output gears 22 will be driven to rotate through the input gear 311. The input gear 311 and the two output gears 22 are bevel gears, and the two output gears 22 are distributed up and down. When the input gear 311 rotates, the direction of rotation of the control rod 21 is different according to the different meshed output gears 22, and it has the effect of changing the transmission direction, converting the original horizontal rotation into vertical rotation. The control rod 21 is connected to the rotation through the bottom connecting shaft 23 and continues to be transmitted to the bottom direction-changing gear set 24. The connecting shaft 23 is connected to the bevel gear at the top of the direction-changing gear set 24. The grooves and protrusions on the surface make the connecting shaft 23 and the direction-changing gear set The bevel gears at the top of the direction-changing gear set 24 can move, but still maintain synchronous rotation. The bevel gear at the top of the direction-changing gear set 24 is fixed and can only rotate. The connecting shaft 23 needs to follow the lifting and lowering of the control rod 21. After the control rod 21 changes the height adjustment meshing output gear 22, it still rotates synchronously with the bevel gear at the top of the direction-changing gear set 24 through the connecting shaft 23. The bevel gear at the top of the direction-changing gear set 24 transmits the rotation to the bevel gear at the bottom, also achieving the effect of changing the transmission direction, so that the axis of rotation after the final output is parallel to the axis of rotation of the welding mounting arm 3. Assuming that the welding mounting arm 3 drives the input gear 311 to rotate clockwise at this time, and at this time the input gear 311 is meshed with the output gear 22 at the top, the final rotation of the direction-changing gear set 24 is in the same direction as the welding mounting arm 3. If it is meshed with the output gear 22 at the bottom, the final rotation direction is reversed. It can also not mesh with the output gear 22. At this time, when the welding mounting arm 3 rotates, it will not drive the driven clamping plate 5 to rotate, thereby changing the different modes during welding.

[0021] The welding mounting arm 3 includes an active rotating arm 31, which is rotatably connected to the welding platform 1. An input gear 311 is fixedly connected to the outer surface of the active rotating arm 31, and a longitudinal moving shaft 32 is fixedly connected to the other side surface of the active rotating arm 31. A longitudinal moving block 321 is slidably connected to the outer surface of the longitudinal moving shaft 32, and a welding mounting clamp 33 is slidably connected to the outer surface of the longitudinal moving block 321. The input gear 311 is meshed with the output gear 22; Through the setting of the welding mounting arm 3, during use, the laser welding head is installed on the welding mounting clamp 33, and the welding mounting clamp 33 and the longitudinal moving block 321 can both move on the longitudinal moving shaft 32, so as to perform axial movement on the single-tube shock absorber that needs to be welded, and the welding mounting clamp 33 can move on the longitudinal moving block 321 to adjust the distance between the welding head and the welding part according to the radial size of the single-tube shock absorber. The active rotating arm 31 can drive the welding mounting clamp 33 and the surface laser welding head to rotate radially around the single-tube shock absorber, and input the rotation to the continuously variable transmission 4 through the forward and reverse adjustment shaft 2 and finally drive the driven clamping disk 5 to rotate, and control the direction of rotation according to the forward and reverse adjustment shaft 2.

[0022] The continuously variable transmission 4 includes an input shaft 41, which is rotatably connected to the inner surface of the welding base 11. A fixed gear 42 is fixedly connected to the outer surface of the input shaft 41. A movable gear 43 is meshed with the top surface of the fixed gear 42. A lifting gear shaft 431 is slidably connected to the inner surface of the movable gear 43. One end of the lifting gear shaft 431 is fixedly connected to a universal coupling 44. The other end of the universal coupling 44 is fixedly connected to a connecting sprocket 45. A connecting chain 451 is sleeved on the outer surface of the connecting sprocket 45. One end of the input shaft 41 is fixedly connected to the bevel gear at the bottom of the direction-changing gear set 24. The lifting gear shaft 431 is slidably connected to the inner surface of the welding base 11. There are two connecting sprockets 45, both of which are rotatably connected to the welding platform 1. Through the setting of the continuously variable transmission 4, during use, the input shaft 41 receives the final rotation from the direction-changing gear set 24 and transmits the rotation to the fixed gear 42. The fixed gear 42 is conical and meshes with the movable gear 43 at the top. The movable gear 43 is also conical to match the slope of the normal plane of the fixed gear 42. The fixed gear 42 does not change its original rotation position, while the movable gear 43 changes the radial size of the pitch circle at the meshing point with the fixed gear 42 after moving, so the transmission ratio also changes. The transmission ratio changes between 0.5 and 2, and the speed-changed rotation is transmitted to the connecting sprocket 45 through the universal coupling 44, and finally drives the driven clamping disk 5 to rotate through the connecting chain 451 and the connecting sprocket 45. Since the movable gear 43 moves on the lifting gear shaft 431, the height of the lifting gear shaft 431 will also change, and the universal coupling 44 is used to adapt to the different angles between it and the connecting sprocket 45. When the movable gear 43 is in the initial position in the middle of the fixed gear 42, the pitch circle size of the movable gear 43 and the fixed gear 42 are the same, and the transmission ratio is 1. When the movable gear 43 moves toward the side where the radial size of the fixed gear 42 is larger, the pitch circle size of the fixed gear 42 increases, and the transmission ratio increases. When the fixed gear 42 rotates, the movable gear 43 rotates a larger angle, and vice versa. In this way, the welding mounting arm 3 can change the rotation angle of the driven clamping plate 5 when performing annular radial welding, and through cooperation with the forward and reverse adjustment shaft 2, when performing laser welding, if welding efficiency is required, the welding mounting arm 3 and the driven clamping plate 5 are adjusted to the opposite direction. At this time, when the welding mounting arm 3 rotates, the driven clamping plate 5 will rotate in the opposite direction, and the relative rotation angle of the welding point is the sum of the rotation angles of the two. When the transmission ratio is one, the welding mounting arm 3 only needs to rotate half a circle to weld a complete circle of the driven clamping plate 5. When the diameter of the welded single-tube shock absorber increases, the radial The adjusting member 6 will drive the movable gear 43 to move toward the side where the radial dimension of the fixed gear 42 is reduced, thereby reducing the transmission ratio. When the welding mounting arm 3 rotates, the driven clamping plate 5 rotates a smaller angle, so that the relative rotation angle is reduced. After the diameter of the monotube shock absorber increases, the linear speed of the welding part decreases, that is, the angular speed decreases as the radius increases, and the angular speed increases as the radius decreases, so that the linear speed matches the diameter size. The wall thickness adjusting member 7 will also adjust the position of the movable gear 43 according to the thickness of the monotube shock absorber. The thicker the wall, the smaller the rotation angle of the driven clamping plate 5, so that the welding part can obtain sufficient heat. If more precise welding is required, the welding mounting arm 3 and the driven clamping plate 5 are adjusted to the same direction. The driven clamping plate 5 will rotate in the same direction as the welding mounting arm 3. The relative rotation angle of the weld is the difference between the two rotation angles. The position of the movable gear 43 is manually adjusted to increase the transmission ratio so that the rotation angle of the driven clamping plate 5 is greater than the rotation angle of the welding mounting arm 3. For example, if the welding mounting arm 3 rotates fifteen degrees and the driven clamping plate 5 rotates twenty degrees, the relative rotation angle of the weld is five degrees, thereby achieving fine rotation adjustment through a large range of motion for fine welding.

[0023] The driven clamping plate 5 includes a chuck shaft 51, which is rotatably connected to the welding platform 1. The outer surface of the chuck shaft 51 is fixedly connected to a chuck base 52. The outer surface of the chuck base 52 is provided with a limiting groove 521. The outer surface of the chuck base 52 is rotatably connected to an electric cam 53. The outer surface of the electric cam 53 is hingedly connected to four annular connecting arms 531. The other end of the connecting arm 531 is hingedly connected to a movable clamping claw 54. The outer surface of the chuck base 52 is fixedly connected to a chuck end cover 55. The chuck shaft 51 is fixedly connected to the connecting sprocket 45. There are four limiting grooves 521 distributed in an annular manner on the chuck base 52 and the chuck end cover 55. The movable jaws 54 are slidably connected to the inner surface of the limiting grooves 521. There are three movable jaws 54. Through the setting of the driven clamping disc 5, during use, the clamping disc shaft 51 is connected to the connecting sprocket 45, receives the rotation from the welding mounting arm 3, and is used to clamp the monotube shock absorber to be welded. After the monotube shock absorber is placed on the clamping disc end cover 55, the electric cam 53 rotates to retract the connecting arm 531 and pull the three movable jaws 54 and the outer clamping block 73 inward at the same time, thereby clamping the monotube shock absorber.

[0024] The radial adjustment member 6 includes a driven push post 61, which is slidably connected to the inner surface of the side housing 12. The outer surface of the driven push post 61 is fixedly connected to an oblique limiting plate A62, and the outer surface of the oblique limiting plate A62 is slidably connected to a driven push-pull clamp A621. The outer surface of the driven push-pull clamp A621 is fixedly connected to an outer movable seat 63, and the inner surface of the outer movable seat 63 is slidably connected to an inner movable seat 64. The outer surface of the inner movable seat 64 is fixedly connected to a push clamping arm 65. The driven push rod 61 contacts the movable clamping claw 54, pushing the clamping arm 65 to slide into connection with the movable gear 43; Through the setting of the radial adjustment member 6, during use, the radial adjustment member 6 is used to adjust the transmission ratio of the continuously variable transmission 4 according to the radial size of the monotube shock absorber, so that the larger the radial size of the clamped monotube shock absorber, the smaller the rotation angle of the driven clamping plate 5. After the clamping of the driven clamping plate 5 is completed, the movable clamping claw 54 will extend at both ends, one end of which is used for clamping, and the other end is in contact with the driven push column 61. The larger the radial size of the monotube shock absorber, the closer it is to the edge, and the driven push column 61 will be pushed outward a greater distance. The driven push column 61 drives the oblique limit plate A62 to move. The oblique limit plate A62 is an inclined surface, and the outer side is in contact with the driven push-pull clamp A621 When it moves toward the outer movable seat 63, the oblique limit plate A62 and the outer movable seat 63 are pushed, and the outer movable seat 63 drives the inner movable seat 64 and the push clamping arm 65 to move, and the push clamping arm 65 is clamped on both sides of the movable gear 43, thereby pushing the movable gear 43 toward the side where the radial dimension of the fixed gear 42 is reduced, and the transmission ratio of the continuously variable transmission 4 is reduced. When the radial dimension of the single-tube shock absorber is reduced, the driven push column 61 and the oblique limit plate A62 are pulled back, and the driven push-pull clamp A621 is clamped in the oblique groove on the oblique limit plate A62 and will also be pulled back, the transmission ratio of the continuously variable transmission 4 is increased, and the driven clamping plate 5 rotates a greater angle.

[0025] The wall thickness adjusting member 7 includes an end mounting groove 71, which is provided on the outer surface of the chuck end cover 55. The inner surface of the end mounting groove 71 is slidably connected to an inner support block 72. One end of the inner support block 72 is fixedly connected to an inner support spring 721. The inner surface of the end mounting groove 71 is slidably connected to an outer clamping block 73. The inner surfaces of the outer clamping block 73 and the inner support block 72 are both hingedly connected to an articulated arm 74. The other end of the articulated arm 74 is hingedly connected to a pushing inclined block 741. The pushing inclined block 741 The outer surface of the driven oblique pushing block 75 is slidably connected to the driven oblique pushing block 75, the bottom surface of the driven oblique pushing block 75 is hingedly connected to the movable base 751, the outer surface of the chuck end cover 55 is fixedly connected to the pushing cross block 752, the outer surface of the movable base 751 is slidably connected to the follower base 76, the outer surface of the follower base 76 is fixedly connected to the extension arm 761, one end of the extension arm 761 is fixedly connected to the oblique limiting plate B77, and the outer surface of the oblique limiting plate B77 is slidably connected to the driven push-pull clamp B78; The other end of the inner support spring 721 is fixedly connected to the inner surface of the end mounting groove 71, the outer clamping block 73 is hingedly connected to the connecting arm 531, the follower base 76 is slidably connected to the outer movable seat 63, and the driven push-pull clamp B78 is fixedly connected to the inner movable seat 64; When the locking cam 752 is in the unlocked position, the locking cam 73 is in the unlocked position, and the locking cam 73 is locked, so that the locking cam 73 is locked and the locking cam 73 is locked. When the radial adjustment member 6 pushes the outer movable seat 63 through the outer diameter, the follower base 76 is inserted into the outer movable seat 63 through the outer connecting column and moves accordingly, so that the relative positions of the extension arm 761 and the oblique limit plate B77 and the driven push-pull clamp B78 on the inner movable seat 64 remain unchanged. The groove in the follower base 76 allows the movable base 751 to move. The longitudinal movement of the follower base 76 will not drive the movable base 751 to move, but the lateral movement of the movable base 751 will drive the follower base 76 to move lateral. At this time, the connecting column of the follower base 76 will slide out of the outer movable seat 63. According to the spacing between the inner support block 72 and the outer clamping block 73, the angles of the two articulated arms 74 are different, and the distances between the pushing bevel block 741 and the inner support block 72 and the outer clamping block 73 are also different. The smaller the angle, the farther the distance, and the driven bevel block 75 is pushed farther. The driven bevel block 75 also uses the oblique limiting plate B77 and the driven push-pull clamp B78. The inner movable seat 64 is pushed out or pulled back on the outer movable seat 63 to adjust the position of the movable gear 43. The oblique limiting plate The angles of B77 and the driven push-pull clamp B78 are opposite to those of the oblique limit plate A62 and the driven push-pull clamp A621. When the driven oblique push block 75 is pushed out, the inner movable seat 64 is pulled back, and when it is pulled back, it is pushed out. In this way, the thicker the wall, the smaller the angle. The shorter the moving distance of the driven oblique push block 75, the shorter the moving distance of the inner movable seat 64, the more the transmission ratio is increased, and the smaller the angle of the driven clamping disk 5 is rotated. The thicker the wall, the slower the driven clamping disk 5 is rotated, and the more heat is obtained during welding. If the wall thickness remains unchanged and only the radial dimension changes, the distance between the inner support block 72 and the outer clamping block 73 remains unchanged, but it will move following the radial change of the monotube shock absorber. The moving path is parallel to the inclined surface of the driven oblique thrust block 75, so it will not push the driven oblique thrust block 75 to move.

[0026] The adaptive reset member 8 includes a speed regulating gear 81, which is rotatably connected to the chuck end cover 55. A speed lever 82 is slidably connected to the inner surface of the end mounting groove 71. A support block hook 821 is fixedly connected to the outer surface of the speed lever 82. The inner surface of the end mounting groove 71 is slidably connected to the original speed lever 83. The support block hook 821 contacts the outer surface of the inner support block 72, the multiplier lever 82 and the support block hook 821 penetrate the outer clamping block 73, the original speed lever 83 is fixedly connected to the movable clamping claw 54 on the opposite side of the outer clamping block 73, and the speed regulating gear 81 is composed of two gears with a pitch circle ratio of one to two, and the two gears are respectively engaged with the original speed lever 83 and the multiplier lever 82; By adapting to the setting of the reset member 8, during use, when the movable clamping claw 54 connected to the original speed rod 83 moves outward to reset, the original speed rod 83 drives the speed regulating gear 81 to rotate, and the speed regulating gear 81 drives the multiplier rod 82 to move in the same direction as the original speed rod 83. Since the pitch circle sizes of the speed regulating gear 81, the original speed rod 83 and the multiplier rod 82 are different, but the angular speeds are the same, the larger the pitch circle size, the greater the linear speed, and the moving speed of the multiplier rod 82 is twice that of the original speed rod 83, and in the process of the multiplier rod 82 moving toward the center position of the chuck end cover 55, the support block hook 821 is used to move the multiplier rod 82. The inner support block 72 pulls back and squeezes the inner support spring 721 to reset the inner support block 72. When clamping the monotube shock absorber, the movable clamping jaw 54 clamps inward, and the speed rod 82 drives the support block hook 821 to move quickly to the other side to prevent blocking the activity space of the inner support block 72. The maximum size of the clamped monotube shock absorber is the radial size of the chuck end cover 55. When clamping the monotube shock absorber, the movable clamping jaw 54 drives the original speed rod 83 to move to the end point at least in the limit groove 521. At this time, the speed rod 82 has moved to the end of the limit groove 521 on the other side and passed through the outer clamping block 73 and the chuck end cover 55.

[0027] In this embodiment, Figure 1 、 Figure 2 As shown, each component is installed inside the welding platform 1, the welding base 11 and the side shell 12; In this embodiment, Figure 3 、 Figure 4 、 Figure 5 As shown, the welding mounting arm 3 rotates through the forward and reverse adjustment shaft 2 to change direction and the continuously variable transmission 4 to change the transmission ratio, driving the driven clamping plate 5 to rotate synchronously; In this embodiment, Figure 6 、 Figure 7 、 Figure 8 As shown, the driven clamping plate 5 clamps the monotube shock absorber by moving the movable clamping jaw 54; In this embodiment, Figure 9 As shown, the driven push pin 61 is in contact with the movable clamping jaw 54; In this embodiment, Figure 10 As shown, the driven push rod 61 changes the transmission ratio by pushing the outer movable seat 63; In this embodiment, Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15 As shown, the wall thickness adjusting member 7 changes the transmission ratio again by pushing the inner movable seat 64; In this embodiment, Figure 16 、 Figure 17As shown, the longitudinal movement of the follower base 76 will not drive the movable base 751 to move, while the lateral movement of the movable base 751 will drive the follower base 76 to move lateral. After the adjustment is completed, the chuck end cover 55 rotates and lifts the driven oblique push block 75 by pushing the horizontal block 752. In this embodiment, Figure 18 、 Figure 19 、 Figure 20 As shown, the adaptive reset member 8 moves at a multiple speed of the rack, pulling the inner support block 72 to reset when the movable clamping jaw 54 is retracted, and the movable clamping jaw 54 does not affect the inner support of the inner support block 72 when clamping.

[0028] The use method and advantages of the present invention: The laser welding auxiliary device for automobile monotube shock absorber has the following working process: like Figures 1 to 20 As shown, when in use, the driven clamping disc 5 is reset, and the movable clamping jaw 54 drives the inner support block 72 to reset through the speed regulating gear 81 and the speed lever 82. The monotube shock absorber to be welded is placed on the clamping disc end cover 55. The electric cam 53 rotates and drives the connecting arm 531 to pull the three movable clamping jaws 54 and the outer clamping block 73 inward to clamp the monotube shock absorber. According to the different radial dimensions of the monotube shock absorber, the movable clamping claw 54 of the radial adjustment member 6 will push the driven push column 61 to move different distances, and push and pull the outer movable seat 63 to adjust the position of the movable gear 43 on the fixed gear 42, so as to perform the first adjustment according to the radial dimensions. On this basis, the wall thickness adjustment member 7 is used for secondary adjustment. The inner support block 72 supports the monotube shock absorber internally, and the spacing between it and the outer clamping block 73 pushes the driven oblique push block 75 to move different distances, and pushes the inner movable seat 64 to achieve the second adjustment. After the laser welding head is installed on the welding mounting arm 3, annular welding is performed on the outer surface of the monotube shock absorber by rotating, and the rotation is transmitted to the driven clamping plate 5 through the forward and reverse adjustment shaft 2 and the continuously variable transmission 4, so that the driven clamping plate 5 rotates synchronously. The forward and reverse adjustment shaft 2 controls the driven clamping plate 5 and the welding mounting arm 3 to rotate in the same direction or in the opposite direction by adjusting the meshing condition of the internal output gear 22 and the input gear 311; In the reverse mode, the relative rotation angle of the hinge is larger, which enables rapid rotation and rapid welding. In the same rotation mode, the transmission ratio is manually adjusted so that the angular velocity of the driven clamping plate 5 is slightly greater than that of the welding mounting arm 3, and the relative rotation angle of the hinge is smaller, which enables precision welding.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser welding auxiliary device for a monotube shock absorber of an automobile, comprising a welding platform (1), a welding base (11) fixedly connected to the top surface of the welding platform (1), and a side shell (12) fixedly connected to the outer surface of the welding platform (1); Its characteristics are: The inner surface of the welding platform (1) is provided with a forward and reverse adjustment shaft (2) for adjusting fast or slow welding, the top surface of the forward and reverse adjustment shaft (2) is provided with a welding mounting arm (3) for inputting the angular velocity of the laser welding head, the bottom surface of the forward and reverse adjustment shaft (2) is provided with a continuously variable transmission (4) for adjusting the output angular velocity of the welding mounting arm (3), one end of the continuously variable transmission (4) is provided with a driven clamping disk (5) for clamping and adjusting the relative speed by utilizing the speed difference of the welding mounting arm (3), the outer surface of the driven clamping disk (5) is provided with a radial adjustment member (6) for adjusting the transmission ratio according to the radial size, the outer surface of the driven clamping disk (5) is provided with a wall thickness adjustment member (7) for adjusting the transmission ratio according to the wall thickness, and the inner surface of the driven clamping disk (5) is provided with an adaptive reset member (8) for resetting.

2. The laser welding auxiliary device for a monotube shock absorber for an automobile according to claim 1, characterized in that: The forward and reverse adjustment shaft (2) includes a control rod (21), the outer surface of the control rod (21) is fixedly connected to an output gear (22), the bottom surface of the control rod (21) is fixedly connected to a connecting shaft (23), and the bottom surface of the connecting shaft (23) is slidably connected to a direction-changing gear set (24); The number of the output gears (22) is two, and the direction-changing gear set (24) is composed of two mutually meshing bevel gears, and the inner surface of the top bevel gear is slidably connected to the connecting shaft (23).

3. The laser welding auxiliary device for a monotube shock absorber for an automobile according to claim 2, characterized in that: The welding mounting arm (3) comprises an active rotating arm (31), the active rotating arm (31) is rotatably connected to the welding platform (1), and an input gear (311) is fixedly connected to the outer surface of the active rotating arm (31).

4. The laser welding auxiliary device for a monotube shock absorber for an automobile according to claim 3, characterized in that: The continuously variable transmission (4) includes an input shaft (41), the input shaft (41) is rotatably connected to the inner surface of the welding base (11), the outer surface of the input shaft (41) is fixedly connected to a fixed gear (42), the top surface of the fixed gear (42) is meshed with a movable gear (43), the inner surface of the movable gear (43) is slidably connected to a lifting gear shaft (431), one end of the lifting gear shaft (431) is fixedly connected to a universal joint (44), the other end of the universal joint (44) is fixedly connected to a connecting sprocket (45), and the outer surface of the connecting sprocket (45) is sleeved with a connecting chain (451).

5. The laser welding auxiliary device for a monotube shock absorber for an automobile according to claim 4, characterized in that: The driven clamping disc (5) includes a clamping disc rotating shaft (51), the clamping disc rotating shaft (51) is rotatably connected to the welding platform (1), the outer surface of the clamping disc rotating shaft (51) is fixedly connected to the clamping disc base (52), the outer surface of the clamping disc base (52) is rotatably connected to the electric cam (53), the outer surface of the electric cam (53) is hingedly connected to four annularly distributed connecting arms (531), and the other end of the connecting arm (531) is hingedly connected to a movable clamping claw (54).

6. The laser welding auxiliary device for a monotube shock absorber for an automobile according to claim 5, characterized in that: The radial adjustment member (6) includes a driven push column (61), the driven push column (61) is slidably connected to the inner surface of the side shell (12), the outer surface of the driven push column (61) is fixedly connected to an oblique limiting plate A (62), the outer surface of the oblique limiting plate A (62) is slidably connected to a driven push-pull clamp A (621), the outer surface of the driven push-pull clamp A (621) is fixedly connected to an outer movable seat (63), the inner surface of the outer movable seat (63) is slidably connected to an inner movable seat (64), and the outer surface of the inner movable seat (64) is fixedly connected to a push clamping arm (65).

7. The laser welding auxiliary device for a monotube shock absorber for an automobile according to claim 6, characterized in that: The wall thickness adjusting member (7) includes an end mounting groove (71), the end mounting groove (71) is provided on the outer surface of the chuck end cover (55), the inner surface of the end mounting groove (71) is slidably connected to an inner support block (72), the inner surface of the end mounting groove (71) is slidably connected to an outer clamping block (73), the inner surfaces of the outer clamping block (73) and the inner surfaces of the inner support block (72) are both hingedly connected to an articulated arm (74), the other end of the articulated arm (74) is hingedly connected to a push inclined block (741), the push inclined block (741) is hingedly connected to the inner surface of the outer clamping block (73), and the inner surfaces of the outer clamping block (73) and the inner support block (72) are hingedly connected to an articulated arm (74). The outer surface of the block (741) is slidably connected to a driven oblique push block (75), the bottom surface of the driven oblique push block (75) is hingedly connected to a movable base (751), the outer surface of the movable base (751) is slidably connected to a follower base (76), the outer surface of the follower base (76) is fixedly connected to an extension arm (761), one end of the extension arm (761) is fixedly connected to an oblique limiting plate B (77), and the outer surface of the oblique limiting plate B (77) is slidably connected to a driven push-pull clamp B (78).

8. The laser welding auxiliary device for a monotube shock absorber for an automobile according to claim 7, characterized in that: The adaptive reset member (8) includes a speed regulating gear (81), the speed regulating gear (81) is rotatably connected to the chuck end cover (55), the inner surface of the end mounting groove (71) is slidably connected to a speed lever (82), the outer surface of the speed lever (82) is fixedly connected to a support block hook (821), and the inner surface of the end mounting groove (71) is slidably connected to an original speed lever (83).

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