Efficient welding tool clamp for automobile drive axle

Abstract

The invention provides an efficient welding tool clamp for an automobile drive axle, and relates to the technical field of automobile manufacturing, and the tool clamp comprises a tool base and two bearing and clamping mechanisms which are symmetrically arranged. Each mechanism comprises a fixed clamping seat, a movable clamping seat, an up-down rolling supporting piece, a semicircular adjusting plate, a driving piece and a steering adjusting piece, wherein the up-down rolling supporting piece, the semicircular adjusting plate, the driving piece and the steering adjusting piece are arranged on the movable clamping seat. Automatic centering of the drive axle in the horizontal direction is achieved through the centering mechanism; the rolling supporting piece switches the supporting mode under the action of the steering adjusting piece, and axial movement is limited. After the movable clamping base is closed, the driving piece drives the semicircular adjusting plate to rotate and pushes the rolling supporting piece to move in the radial direction, the drive axle is positioned and pressed in the vertical direction, meanwhile, the drive axle is allowed to rotate around the axis, and multidirectional welding is facilitated. The device has the advantages of being high in positioning precision, stable in clamping, easy and convenient to operate and the like, and the drive axle welding efficiency and quality are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile manufacturing, and particularly relates to an efficient welding fixture clamp for an automobile drive axle. BACKGROUND

[0002] As a key component of a vehicle transmission system, an automobile drive axle is mainly used for transmitting power, bearing load and realizing differential function, and the structural strength and welding quality of the automobile drive axle directly affect the safety and reliability of the vehicle. The drive axle is usually welded by a bridge shell, a half shaft sleeve, a main reducer shell and other components, and has the characteristics of complex structure, many welds and high precision requirement.

[0003] At present, the automobile drive axle welding has the following defects: the welding of the drive axle is usually positioned and fixed by manual operation, and has the problems of low positioning accuracy, poor clamping efficiency and high labor intensity, and especially when the workpiece angle and position are adjusted repeatedly during centering adjustment and circumferential welding, the welding consistency and production efficiency are seriously affected. With the improvement of the requirements of the automobile industry on lightweight and high-strength manufacturing, it has become an urgent need in the field of drive axle manufacturing to develop an efficient welding fixture capable of realizing rapid centering, reliable clamping and supporting rotation adjustment. SUMMARY

[0004] The present application aims to provide an efficient welding fixture clamp for an automobile drive axle to solve the technical problems proposed in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The utility model provides a kind of high-efficiency welding tool fixture of automobile drive axle, including the tool base fixed on welding equipment and two for supporting and clamping drive axle body two end parts supporting clamping mechanism, two supporting clamping mechanism are respectively arranged in the both ends of tool base, the supporting clamping mechanism includes fixed clamping seat and movable clamping seat, fixed clamping seat is fixed in drive axle body end part by bottom frame part, movable clamping seat is arranged in the upper side of fixed clamping seat, movable clamping seat can rotate around the side of fixed clamping seat to realize opening and closing, fixed clamping seat and movable clamping seat can form the round cavity that can be clamped in the outside of drive axle body end part when closing, two lower rolling supports are provided on the both end faces of fixed clamping seat, upper rolling support is provided on the both end faces of movable clamping seat, the same side lower rolling support and upper rolling support are evenly arranged in circumference, half-round adjusting plate is arranged on fixed clamping seat and movable clamping seat, and rotates and slides on it, when fixed clamping seat and movable clamping seat close, two half-round adjusting plates form a central circular ring rotating around the round cavity, driving member is provided on fixed clamping seat, and driving member is connected with one of half-round adjusting plates and drives it to rotate on fixed clamping seat;Rotating two half-round adjusting plates can drive lower rolling support and upper rolling support to move radially synchronously relative to the center of round cavity;Fixed clamping seat is further provided with steering adjusting member, and the steering adjusting member is connected with two lower rolling supports and can drive it to rotate around its center;The centering mechanism is further provided on the drive axle body, and the both ends of the centering mechanism extend to the outside of two supporting clamping mechanisms respectively, and the centering mechanism can abut against the both ends of drive axle body and apply axial force to the center thereof synchronously.

[0006] Based on the above technical solutions, the present application also provides the following optional technical solutions: In an optional solution: the lower rolling support and the upper rolling support each include a top support rod and a top support clamping wheel, the top support rod has a sleeve portion that is axially slidable, in the lower rolling support, the sleeve portion is rotatably arranged on the end face of the fixed clamping seat via a mounting seat, and the sleeve portion is connected with the steering adjusting member; in the upper rolling support, the sleeve portion is fixed on the end face of the movable clamping seat via a mounting seat; the top support clamping wheel is arranged at the end of the top support rod that points to the center of the round cavity, and the tail end of the top support rod is connected with the half-round adjusting plate.

[0007] In an optional solution: the tail of the top support rod is provided with a tail disc portion that rotates with the tail, the tail disc portion is provided with an extension rod, the half-round adjusting plate is provided with two arc-shaped clamping grooves, and the centers of the arc-shaped clamping grooves are offset from the center of the half-round adjusting plate; the extension rod extends into the corresponding arc-shaped clamping groove, and the outer edge of the half-round adjusting plate is further provided with a clamping arc rack; the driving member includes a double-shaft clamping motor and two clamping gears arranged on the two output ends of the double-shaft clamping motor respectively, the double-shaft clamping motor is fixed on the side of the fixed clamping seat, and the clamping gears are engaged with the clamping arc rack on the same side.

[0008] In an alternative, the sleeve part is provided with a plurality of sector gear parts, the steering adjusting member comprises a steering adjusting unit and a steering driving assembly, the steering adjusting unit is rotatably and slidably arranged on the end face of the fixed holder, both ends of the steering adjusting unit are provided with self-rotating racks which are engaged with the sector gear parts respectively, the steering adjusting unit is provided with an intermediate rod in the middle part, the steering driving assembly is arranged at the lower end of the fixed holder, both ends of the steering driving assembly extend to the two side faces of the fixed holder and are connected with the intermediate rod, the steering driving assembly can rotate the intermediate rod to move around the center of the circular cavity.

[0009] In an alternative, the steering driving assembly comprises a self-rotation driving rod shaft and a sliding seat, the self-rotation driving rod shaft is rotatably arranged on the chassis part, the self-rotation driving rod shaft is provided with a steering adjusting screw segment in the middle part, the sliding seat is slidably arranged on the bottom of the fixed holder, the steering adjusting screw segment spirally penetrates the sliding seat, both ends of the sliding seat are provided with side rod members which extend to the side of the fixed holder and are provided with guide holes, the self-rotation driving rod shaft extends into the guide holes; the end of the self-rotation driving rod shaft is provided with a hand wheel.

[0010] In an alternative, the side edge part of the movable holder is provided with an outer supporting arm which is rotatably connected with the side edge part of the fixed holder, the other side edge part of the movable holder is provided with a protrusion, the other side edge part of the movable holder is fixedly provided with a fixed protrusion which is opposite to the protrusion and is provided with a rotatable blocking block.

[0011] In an alternative, the centering mechanism comprises a centering driving assembly and two centering top driving assemblies, the centering driving assembly comprises a centering motor and two centering racks which are slidably arranged on the tool base, the centering motor is fixedly arranged at the middle part of the tool base and is provided with a centering gear at the output end, the centering racks are respectively arranged at both sides of the centering motor and are engaged with the centering gear from both sides; each centering rack is provided with a centering connecting rod which is connected with the centering top driving assembly at the same side, the two centering top driving assemblies are respectively arranged at the side parts which are away from each other of the two supporting and clamping mechanisms.

[0012] In an alternative: the centering jacking assembly includes an axial push plate, a brake rotary disc part and a brake unit, the axial push plate is arranged opposite to the support clamping mechanism and is fixedly connected with the end of the centering connecting rod away from the centering rack; the brake rotary disc part is rotationally arranged on the end face of the axial push plate facing the support clamping mechanism, and is used to abut against the end of the drive axle body; the edge part of the brake rotary disc part is provided with a plurality of tooth grooves; the brake unit includes a brake cylinder, a connecting seat and a plurality of radial movable seats, the brake cylinder is fixed at the center position of the end of the axial push plate away from the support clamping mechanism, the connecting seat is arranged at the telescopic end of the brake cylinder, and the plurality of radial movable seats are distributed in the edge position of the axial push plate in a circumferential direction; the radial movable seat can slide radially on the axial push plate, and the end of the radial movable seat is provided with a brake tooth body located on the end face of the axial push plate facing the support clamping mechanism, which can be clamped into the tooth groove; the connecting seat and the plurality of radial movable seats are connected through a brake connecting rod.

[0013] By adopting the technical scheme, the present application has the following beneficial effects: The automobile drive axle high-efficiency welding tool clamp provided by the present application can realize automatic centering and positioning of the drive axle in the horizontal direction by synchronously applying axial force through the centering mechanism and cooperating with the rolling support structure, thereby significantly improving positioning accuracy and consistency; the circumferentially arranged rolling support members and the rotatable semicircular adjusting plate can realize radial compression of the drive axle while still allowing the drive axle to freely rotate around the axis, thereby facilitating multi-angle welding and improving welding accessibility and quality; the fixed and movable clamping seats form a rigid circular cavity structure after being closed, thereby enhancing overall rigidity; the driving member and the steering adjusting member are cooperatively controlled to realize one-key clamping and releasing, thereby greatly improving clamping efficiency and reducing the operation burden; the tool clamp can adapt to clamping requirements of drive axles of different specifications, has good universality and expandability, and is suitable for automatic production lines and robot welding systems. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0015] Figure 1 It is a schematic diagram of the drive axle body mounting structure of the present application.

[0016] Figure 2 It is a schematic diagram of the automobile drive axle high-efficiency welding tool clamp structure in the present application.

[0017] Figure 3 It is a schematic diagram of the support clamping mechanism structure in an embodiment of the present application.

[0018] Figure 4 Structure diagram of lower rolling support in one embodiment of the present application.

[0019] Figure 5 Structure diagram of steering driving assembly in one embodiment of the present application.

[0020] Figure 6 Structure diagram of centering jacking assembly in one embodiment of the present application.

[0021] Figure 7 Structure diagram of braking unit in one embodiment of the present application.

[0022] Figure mark annotation: driving bridge body 100, tool base 200, supporting clamp fixing mechanism 300, fixed clamp seat 310, fixed protrusion 311, blocking block 312, movable clamp seat 320, outer support arm 321, protrusion 322, chassis part 330, lower rolling support 340, top support rod 341, mounting seat 342, sleeve part 343, sector gear part 344, top support clamping wheel 345, tail disc part 346, extension rod 347, upper rolling support 350, semicircular adjusting plate 360, arc-shaped clamping groove 361, clamping arc rack 362, steering adjusting unit 370, intermediate rod 371, self-rotation action rack 372, steering driving assembly 380, self-rotation driving rod shaft 381, steering adjusting screw segment 382, hand wheel 383, sliding seat 384, side rod 385, guide hole 386, double-shaft clamping motor 390, clamping gear 391, centering driving assembly 400, centering motor 410, centering gear 420, centering rack 430, centering connecting rod 440, centering jacking assembly 500, axial pushing disc 510, braking turntable part 520, gear slot 521, braking unit 530, braking cylinder part 531, radial movable seat 532, braking gear body 533, connecting seat 534, braking connecting rod 535. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0024] The left-right-up-down positions of various components given in the drawings are only one arrangement, and the specific positions are set according to specific needs.

[0025] In one embodiment, as Figures 1-4The utility model discloses a kind of high-efficiency welding tool clamps of automobile drive axle, including the tool base 200 fixed on welding equipment and two support and clamping mechanism 300 for supporting the both ends of drive axle body 100, two support and clamping mechanism 300 are respectively arranged at the both ends of tool base 200, the support and clamping mechanism 300 includes fixed clamping seat 310 and movable clamping seat 320, fixed clamping seat 310 is fixed in the end of drive axle body 100 by chassis part 330, movable clamping seat 320 is arranged on the upside of fixed clamping seat 310, movable clamping seat 320 can rotate around one side of fixed clamping seat 310 to realize opening and closing, fixed clamping seat 310 and movable clamping seat 320 can form the round cavity that can be clamped in the outside of the end of drive axle body 100 when closing, two lower rolling supports 340 are arranged on the both end faces of fixed clamping seat 310, upper rolling support 350 is arranged on the both end faces of movable clamping seat 320, the same side lower rolling support 340 and upper rolling support 350 are evenly arranged in circumference, semi-circular adjusting plate 360 that rotates and slides on it is arranged on fixed clamping seat 310 and movable clamping seat 320, when fixed clamping seat 310 and movable clamping seat 320 close, two semi-circular adjusting plates 360 form a central ring that rotates around the round cavity, driving part is arranged on fixed clamping seat 310, driving part is connected with one of semi-circular adjusting plate 360, and drives it to rotate on fixed clamping seat 310;Rotating two semi-circular adjusting plates 360 can drive lower rolling support 340 and upper rolling support 350 to move radially synchronously relative to the center of round cavity;Fixed clamping seat 310 is also provided with steering adjusting part, the steering adjusting part is connected with two lower rolling supports 340, and can drive it to rotate around its center;Drive axle body 100 is also provided with centering mechanism, centering mechanism two ends extend to the outside of two support and clamping mechanism 300 respectively, centering mechanism can abut against the both ends of drive axle body 100, and apply axial force to the center synchronously.

[0026] In the embodiment of the present application, in the initial state, the fixed clamping seat 310 and the movable clamping seat 320 in the two supporting and clamping mechanisms 300 are in the unfolded state, the drive axle body 100 can be placed on the whole tool by a mechanical hand or manually, the two ends of the drive axle body 100 are on the fixed clamping seat 310, and the end portions of the two ends are axially supported by the upper rolling support 350 and are directed to the center of the circular cavity; the centering mechanism starts to work, and the two ends thereof are synchronously close to the end portions of the drive axle body 100, one end thereof first contacts the end portion of the drive axle body 100 and applies an axial force thereto, since the upper rolling support 350 axially supports the drive axle body 100, the drive axle body 100 can be freely axially moved, when the other end of the drive axle body 100 contacts the other end of the centering mechanism, the center of the drive axle body 100 is located at the symmetrical center position of the two supporting and clamping mechanisms 300, and thus the centering is automatically realized to realize the horizontal positioning; after the centering is completed, the steering adjusting member drives the two lower rolling supports 340 to rotate around the center thereof, so that the end portions of the lower rolling supports 340 support the end portions of the drive axle body 100 in the circumferential rolling manner, and the axial movement of the drive axle body 100 can be limited to a certain extent; the movable clamping seat 320 starts to act and gradually engages with the fixed clamping seat 310, the lower rolling support 340 and the upper rolling support 350 are directed to the center of the circular cavity, and the two ends of the two semicircular adjusting plates 360 are opposite and abut; the driving member drives the semicircular adjusting plate 360 to rotate around the center of the circular cavity, the two rotating semicircular adjusting plates 360 can drive the lower rolling support 340 and the upper rolling support 350 to move radially relative to the center of the circular cavity, the end portions of the lower rolling support 340 and the upper rolling support 350 act on the end portions of the drive axle body 100 to drive the drive axle body 100 to move to the center position of the circular cavity to realize the vertical positioning, and part of the two semicircular adjusting plates 360 is on the end face of the fixed clamping seat 310 and the movable clamping seat 320, which can improve the connection strength of the fixed clamping seat 310 and the movable clamping seat 320; since the end portions of the lower rolling support 340 and the upper rolling support 350 press the end portions of the drive axle body 100 in the circumferential rolling manner, the drive axle body 100 can be freely rotated around the center line thereof, which is convenient for adjusting the upward surface of the drive axle body 100 to adapt to the full welding of the outer surface of the drive axle body 100 by the welding equipment, and the whole drive axle body 100 is convenient to install.

[0027] In one embodiment, as Figures 2-4As shown, the lower rolling support 340 and the upper rolling support 350 each include a top support rod 341 and a top support clamping wheel 345, the top support rod 341 is sleeved with a sleeve part 343 which can axially slide, in the lower rolling support 340, the sleeve part 343 is rotatably arranged on the end face of the fixed clamping seat 310 through a mounting seat 342, and the sleeve part 343 is connected with a turning adjusting part; in the upper rolling support 350, the sleeve part 343 is fixed on the end face of the movable clamping seat 320 through the mounting seat 342; the top support clamping wheel 345 is arranged at the end of the top support rod 341 which points to the center of the circular cavity, and the tail end of the top support rod 341 is connected with a semicircular adjusting plate 360; in the embodiment of the application, in the initial state, the top support clamping wheel 345 can axially roll to support the end of the drive axle body 100, the drive axle body 100 can be freely axially moved and is axially moved by the centering mechanism driver to realize horizontal positioning; the turning adjusting assembly drives the sleeve part 343 in the lower rolling support 340 to rotate, so that the top support rod 341 and the top support clamping wheel 345 are rotated by 90 degrees, the top support clamping wheel 345 changes from axially rolling to support the end of the drive axle body 100 to circumferentially rolling to support the end of the drive axle body 100, so that the drive axle body 100 can rotate around its own axis to adjust the welding surface, so as to facilitate the full welding of the surface of the drive axle body 100; the rotating semicircular adjusting plate 360 acts on the tail end of the top support rod 341 to realize the axial movement of the top support rod 341 relative to the sleeve part 343, so that the top support clamping wheel 345 in the lower rolling support 340 and the upper rolling support 350 can move towards the center of the circular cavity, so that the drive axle body 100 moves in the vertical direction and is located at the center of the circular cavity, so as to realize vertical positioning.

[0028] In one embodiment, as Figures 2-4As shown, the tail of the top support rod 341 is provided with a tail disc part 346 which is rotationally matched with the tail disc part 346, and the tail disc part 346 is provided with an extension rod 347, the semicircular adjusting plate 360 is provided with two arc-shaped clamping grooves 361, and the center of the arc-shaped clamping groove 361 is dislocated with the center of the semicircular adjusting plate 360; the extension rod 347 extends into the corresponding arc-shaped clamping groove 361, and the outer edge of the semicircular adjusting plate 360 is further provided with a clamping arc gear 362; the driving member includes a double-shaft clamping motor 390 and two clamping gears 391 which are respectively arranged on the two output ends of the double-shaft clamping motor 390, and the double-shaft clamping motor 390 is fixed on the side of the fixed clamping seat 310, and the clamping gears 391 are meshed with the clamping arc gear 362 on the same side; in the embodiment of the application, the double-shaft clamping motor 390 works and drives the clamping gears 391 to rotate, the clamping gears 391 rotate the semicircular adjusting plate 360 around the center of the circular cavity through the meshing with the clamping arc gear 362, the arc-shaped clamping groove 361 moves and makes the tail disc part 346 and the top support rod 341 move radially through the action on the extension rod 347, and when the extension rod 347 is located at one end of the arc-shaped clamping groove 361, the top support clamping wheel 345 is in contact with the outer wall of the end of the drive axle body 100.

[0029] In one embodiment, as shown in the figure, Figures 2-4 The outer wall of the sleeve part 343 is provided with a sector gear part 344, the turning adjusting member includes a turning adjusting unit 370 and a turning driving assembly 380, the turning adjusting unit 370 is rotatably and slidably arranged on the end face of the fixed clamping seat 310, both ends of the turning adjusting unit 370 are provided with self-rotation action racks 372 which are respectively meshed with the two sector gear parts 344, and the middle part of the turning adjusting unit 370 is provided with an intermediate rod 371, the turning driving assembly 380 is arranged at the lower end of the fixed clamping seat 310, both ends of the turning driving assembly 380 extend to the two side faces of the fixed clamping seat 310 and are connected with the intermediate rod 371, and the turning driving assembly 380 can rotate and move the intermediate rod 371 around the center of the circular cavity; in the embodiment of the application, after adjusting the horizontal position of the drive axle body 100, the turning driving assembly 380 acts on the intermediate rod 371 and makes it rotate around the center of the circular cavity, the turning adjusting unit 370 and the self-rotation action rack 372 rotate with the intermediate rod 371, the sleeve part 343 rotates through the meshing of the self-rotation action rack 372 with the sector gear part 344, and the top support rod 341 rotates to change the rolling direction of the top support clamping wheel 345 from the axial rolling to the circumferential rolling.

[0030] In one embodiment, as shown in the figure, Figures 2-5As shown, the steering drive assembly 380 includes a self-rotating drive shaft 381 and a slide 384. The self-rotating drive shaft 381 is rotatably mounted on the base frame 330. A steering adjustment helical section 382 is located at the middle of the self-rotating drive shaft 381. The slide 384 is slidably mounted on the bottom of the fixed clamp 310. The steering adjustment helical section 382 spirally passes through the slide 384. Side rods 385 are provided at both ends of the slide 384, extending to the side of the fixed clamp 310 and having guide holes 386. The self-rotating drive shaft 381 extends into the guide holes 386. A handwheel 383 is located at the end of the self-rotating drive shaft 381. In this embodiment of the invention... Turning the handwheel 383 causes the self-rotating drive shaft 381 to rotate. The steering adjustment screw section 382, ​​through the screw engagement of the slide 384 and the sliding restriction of the slide 384 along the bottom of the fixed clamp 310, allows the slide 384 to move horizontally and radially relative to the fixed clamp 310. The side rod 385 acts on the middle rod 371 to cause it to rotate, thereby quickly adjusting the support mode of the lower rolling support 340. Furthermore, due to the screw engagement of the mounting base 342 and the slide 384, after adjusting the support direction of the lower rolling support 340, the stability of the steering adjustment unit 370 and the stable support of the lower rolling support 340 can be ensured.

[0031] In one embodiment, such as Figure 2 and Figure 3 As shown, the movable clamp 320 has an outer support arm 321 on its side, which is rotatably connected to the side of the fixed clamp 310. The other side of the movable clamp 320 has a protrusion 322, and a fixed protrusion 311 opposite to the protrusion 322 is fixed to the other side of the movable clamp 320. A rotatable blocking block 312 is provided on the fixed protrusion 311. In this embodiment of the invention, the movable clamp 320 can be adjusted by the outer support arm 321 and... The connection method of the fixed clamp 310 enables the opening and closing of the fixed clamp 310; when the movable clamp 320 and the fixed clamp 310 are engaged, the protrusion 322 and the fixed protrusion 311 are opposite and in contact. The blocking block 312 is rotated so that its end is placed on the upper side of the protrusion 322, thereby effectively preventing the protrusion 322 from disengaging from the fixed protrusion 311, so as to ensure the stability of the engagement between the movable clamp 320 and the fixed clamp 310, and the operation is relatively simple.

[0032] In one embodiment, such as Figure 2 , Figure 6 and Figure 7As shown, the centering mechanism comprises a centering driving assembly 400 and two centering jacking assemblies 500, the centering driving assembly 400 comprises a centering motor 410 and two centering racks 430 slidably arranged on the tool base 200, the centering motor 410 is fixed at the middle position of the tool base 200, the output end of the centering motor 410 is provided with a centering gear 420, the centering racks 430 are respectively located at the two sides of the centering motor 410 and are engaged with the centering gear 420 from the two sides; each centering rack 430 is provided with a centering connecting rod 440, the centering connecting rod 440 is connected with the centering jacking assembly 500 at the same side, and the two centering jacking assemblies 500 are respectively located at the sides away from the two support clamp fixing mechanisms 300; in the embodiment of the application, the centering motor 410 starts to work and moves the two centering racks 430 in the reverse direction synchronously through the engagement of the centering gear 420 and the two centering racks 430, the centering connecting rod 440 and the centering jacking assembly 500 move along with the opposite centering rack 430, and then the two centering jacking assemblies 500 move away from or close to each other; when the two centering jacking assemblies 500 are close to each other, the two centering jacking assemblies 500 apply axial force to the end of the driving bridge main body 100, so that the driving bridge main body 100 is located at the horizontal center position of the whole tool clamp, the welding device is accurately positioned, and the welding accuracy is improved.

[0033] In one embodiment, as Figure 2 、 Figure 6 and Figure 7As shown, the centering jacking assembly 500 includes an axial pushing disc 510, a brake rotating disc part 520 and a brake unit 530, the axial pushing disc 510 is arranged opposite to the supporting clamping mechanism 300 and is fixedly connected with the end of the centering connecting rod 440 away from the centering rack 430; the brake rotating disc part 520 is rotationally arranged on the end face of the axial pushing disc 510 towards the supporting clamping mechanism 300, and is used for abutting against the end of the drive axle body 100; the edge part of the brake rotating disc part 520 is provided with a plurality of tooth grooves 521; the brake unit 530 includes a brake cylinder piece 531, a connecting seat 534 and a plurality of radial movable seats 532, the brake cylinder piece 531 is fixed at the center position of the end face of the axial pushing disc 510 away from the supporting clamping mechanism 300, the connecting seat 534 is arranged at the telescopic end of the brake cylinder piece 531, and the plurality of radial movable seats 532 are circumferentially distributed at the edge position of the axial pushing disc 510 and can slide radially on the axial pushing disc 510, and the end of the radial movable seat 532 is provided with a brake tooth body 533 located at the end face of the axial pushing disc 510 towards the supporting clamping mechanism 300, and the brake tooth body 533 can be clamped into the tooth groove 521; the connecting seat 534 and the plurality of radial movable seats 532 are connected through a brake connecting rod 535; in the embodiment of the application, one end of the brake connecting rod 535 is hinged with the connecting seat 534 and the other end is hinged with the radial movable seat 532; the brake rotating disc part 520 abuts against the end of the drive axle body 100, and when the welding surface position of the drive axle body 100 is adjusted, the brake rotating disc part 520 can rotate with the drive axle body 100; after the adjustment is completed, the brake cylinder piece 531 is elongated and pushes the connecting seat 534 away from the axial pushing disc 510, the connecting seat 534 pulls the plurality of radial movable seats 532 to move towards the center of the axial pushing disc 510 through the brake connecting rod 535, the brake tooth body 533 moves with the radial movable seat 532 and gradually clamps into the tooth groove 521, thereby effectively limiting the rotation of the brake rotating disc part 520, and the stability of the drive axle body 100 after the welding surface is adjusted can be realized.

[0034] The above embodiment provides a high-efficiency welding tool clamp for an automobile drive axle, and the specific implementation process is as follows: I. Initial state and feeding In the initial state, the fixed clamping seat 310 and the movable clamping seat 320 in the two supporting clamping mechanisms 300 are in the unfolded state. The drive axle body 100 is placed on the tool base 200 by a mechanical hand or manually, and the two ends are respectively placed on the two fixed clamping seats 310 and are supported by the top supporting clamping wheel 345 of the upper rolling support 350 in the form of axial rolling, at this time, the drive axle body 100 can move freely in the axial direction.

[0035] II. Horizontal centering positioning Starting the centering mechanism: the centering motor 410 is started to drive the centering gear 420 to rotate, which drives the two side centering racks 430 to move synchronously and reversely, and pushes the centering connecting rod 440 and the centering jacking assembly 500 to move close to the end of the drive axle body 100.

[0036] Applying axial force to realize horizontal centering: the brake rotating disc part 520 in the centering jacking assembly 500 first contacts one end of the drive axle body 100 and applies axial force, and since the two ends of the drive axle body 100 are axially supported by the jacking clamping wheel 345, it can move axially freely. When the other end also contacts the centering jacking assembly 500, the drive axle body 100 is pushed to the symmetrical center position of the two supporting clamping mechanisms 300, and the horizontal centering positioning is completed.

[0037] Three, switching support mode and clamping Switching the support mode of the lower rolling support: turn the hand wheel 383 of the steering drive assembly 380 to drive the self-rotation drive rod shaft 381 to rotate, and push the sliding seat 384 to move radially through the steering adjusting spiral section 382, which drives the side lever 385 to act on the middle rod 371 of the steering adjusting unit 370 to make it rotate around the center of the circular cavity. The self-rotation action rack 372 at both ends of the steering adjusting unit 370 is engaged with the sector gear part 344 of the lower rolling support 340 to drive the sleeve part 343 to rotate 90°, so that the jacking clamping wheel 345 is switched from axial rolling support to circumferential rolling support, which limits the axial movement of the drive axle body 100 while allowing it to rotate around the axis.

[0038] Closing the movable clamping seat: rotate the movable clamping seat 320 around the outer support arm 321 to make it engage with the fixed clamping seat 310 to form a circular cavity surrounding the end of the drive axle body 100. Rotate the blocking block 312 to make it engage on the upper side of the protrusion 322 to lock the position of the movable clamping seat 320.

[0039] Four, vertical direction positioning and clamping Driving the semi-circular adjusting plate to rotate: start the double-shaft clamping motor 390 to drive the clamping gear 391 to rotate, which is engaged with the clamping arc rack 362 of the semi-circular adjusting plate 360 to drive the two semi-circular adjusting plates 360 to rotate synchronously around the center of the circular cavity.

[0040] Radial adjustment of the position of the support part: the arc-shaped clamping groove 361 on the semi-circular adjusting plate 360 pushes the extension rod 347 to drive the tail disc part 346 and the jacking rod 341 to move radially, so that the jacking clamping wheel 345 of the lower rolling support 340 and the upper rolling support 350 shrinks towards the center of the circular cavity, pushing the end of the drive axle body 100 to the center of the circular cavity to complete the vertical direction positioning. At this time, the jacking clamping wheel 345 compresses the drive axle body 100 in a circumferential rolling manner, allowing it to rotate around the axis.

[0041] Five, welding surface adjustment and locking Adjusting welding surface: the drive axle body 100 can be rotated around the axis manually or by an external device to adjust the surface to be welded to the optimal welding angle.

[0042] Locking the rotating position: start the brake cylinder 531 to push the connecting seat 534 to move, pull the radial movable seat 532 to the center through the brake connecting rod 535, and make the brake gear body 533 clamped into the tooth groove 521 of the brake turntable part 520, so as to lock the rotating position of the brake turntable part 520 and the drive axle body 100, and ensure the stability of the workpiece during welding.

[0043] Six, welding and unloading The welding equipment welds the outer surface of the drive axle body 100. After welding, the clamping is released in reverse order: first release the brake unit 530, then reverse the double-shaft clamping motor 390 to make the supporting clamping wheel 345 loose, open the movable clamping seat 320, and finally remove the centering top driving assembly 500 through the centering mechanism, so as to take out the welded drive axle body 100.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

Claims

1. A high-efficiency welding fixture for an automobile drive axle, comprising a fixture base fixable to a welding device and two support and clamping mechanisms for supporting and clamping both end portions of a drive axle body, the two support and clamping mechanisms being respectively arranged at both ends of the fixture base, characterized in that, The supporting and clamping mechanism comprises a fixed clamping seat and a movable clamping seat; The fixed clamping seat is fixed on the end of the drive axle body through the chassis part, and the movable clamping seat is arranged on the upper side of the fixed clamping seat. The movable clamping seat can rotate around one side of the fixed clamping seat to realize opening and closing. When the fixed clamping seat and the movable clamping seat are closed, a circular cavity that can be clamped on the outside of the end of the drive axle body is formed. Two lower rolling support members are arranged on the end faces of the fixed clamping seat, and upper rolling support members are arranged on the end faces of the movable clamping seat. The lower rolling support members and the upper rolling support members on the same side are arranged in a circumferential direction. Half-circular adjusting plates that rotate and slide on the fixed clamping seat and the movable clamping seat are arranged on the fixed clamping seat and the movable clamping seat. When the fixed clamping seat and the movable clamping seat are closed, the two half-circular adjusting plates form a central circular ring that rotates around the circular cavity. A driving member is arranged on the fixed clamping seat. The driving member is connected with one of the half-circular adjusting plates and drives it to rotate on the fixed clamping seat. The rotating two half-circular adjusting plates can drive the lower rolling support members and the upper rolling support members to move radially synchronously relative to the center of the circular cavity. A turning adjusting member is further arranged on the fixed clamping seat. The turning adjusting member is connected with the two lower rolling support members and can drive them to rotate around the center thereof. A centering mechanism is further arranged on the drive axle body. The centering mechanism extends to the outside of the two supporting and clamping mechanisms respectively at both ends thereof. The centering mechanism can abut against both ends of the drive axle body and apply axial force synchronously to the center thereof.

2. The automotive drive axle high efficiency welding fixture clamp of claim 1, wherein, The lower rolling support members and the upper rolling support members each comprise a top supporting rod and a top supporting clamping wheel. A sleeve part that can axially slide is arranged on the top supporting rod. In the lower rolling support member, the sleeve part is arranged on the end face of the fixed clamping seat through a mounting seat. The sleeve part is further connected with the turning adjusting member. In the upper rolling support member, the sleeve part is fixed on the end face of the movable clamping seat through a mounting seat. The top supporting clamping wheel is arranged on the end of the top supporting rod that points to the center of the circular cavity. The tail end of the top supporting rod is connected with the half-circular adjusting plate.

3. The automotive drive axle high efficiency welding fixture clamp of claim 2, wherein, The tail end of the top supporting rod is provided with a tail disc part that rotates with the tail end. The tail disc part is provided with an extension rod. The half-circular adjusting plate is provided with two arc-shaped clamping grooves. The centers of the arc-shaped clamping grooves are offset from the center of the half-circular adjusting plate. The extension rod extends into the corresponding arc-shaped clamping groove. The outer edge of the half-circular adjusting plate is further provided with a clamping arc gear rack. The driving member comprises a double-shaft clamping motor and two clamping gears arranged on the two output ends of the double-shaft clamping motor respectively. The double-shaft clamping motor is fixed on the side of the fixed clamping seat. The clamping gears on the output ends are engaged with the clamping arc gear rack.

4. The automotive drive axle high efficiency welding fixture clamp of claim 3, wherein, The outer wall of the sleeve part is provided with a sector gear part. The turning adjusting member comprises a turning adjusting unit and a turning driving assembly. The turning adjusting unit is arranged on the end face of the fixed clamping seat in a rotatable and sliding manner. The turning adjusting unit is provided with self-rotation action racks at both ends thereof that are engaged with the two sector gear parts respectively. The middle part of the turning adjusting unit is provided with an intermediate rod. The turning driving assembly is arranged on the lower end of the fixed clamping seat. The turning driving assembly extends to the two side faces of the fixed clamping seat at both ends thereof and is connected with the intermediate rod. The turning driving assembly can rotate the intermediate rod to move around the center of the circular cavity.

5. The automotive drive axle high efficiency welding fixture clamp of claim 4, wherein, The steering drive assembly comprises a rotation drive rod shaft and a sliding seat, the rotation drive rod shaft is rotationally arranged on the chassis, and the rotation drive rod shaft has a steering adjusting screw segment at a middle position thereof; The sliding seat is slidably arranged at the bottom of the fixed clamping seat, the steering adjusting screw segment is screwed through the sliding seat, side rod members are arranged at both ends of the sliding seat, the side rod members extend to the side of the fixed clamping seat and are provided with guide holes, the rotation drive rod shaft extends into the guide holes, and the rotation drive rod shaft has a hand wheel at an end thereof.

6. The automotive drive axle high efficiency welding fixture clamp of claim 1, wherein, The side of the movable clamping seat is provided with an outer supporting arm, the outer supporting arm is rotationally connected with the side of the fixed clamping seat, the other side of the movable clamping seat is provided with a protrusion, the other side of the movable clamping seat is fixed with a fixed protrusion opposite to the protrusion, and the fixed protrusion is provided with a rotatable blocking block.

7. The automotive drive axle high efficiency welding fixture clamp of any one of claims 1-6, wherein, The centering mechanism comprises a centering drive assembly and two centering top driving assemblies. The centering drive assembly comprises a centering motor and two centering racks slidably arranged on the tool base. The centering motor is fixed at a middle position of the tool base, and an output end of the centering motor has a centering gear; the centering racks are respectively arranged at two sides of the centering motor and are in mesh with the centering gear at the two sides. A centering connecting rod is arranged on each centering rack, the centering connecting rod is connected with the centering top driving assembly at the same side, and the two centering top driving assemblies are respectively arranged at the sides away from each other of the two supporting and clamping mechanisms.

8. The automotive drive axle high efficiency welding fixture clamp of claim 7, wherein, The centering top driving assembly comprises an axial pushing disc, a brake rotary disc part and a brake unit. The axial pushing disc is arranged opposite to the supporting and clamping mechanism and is fixedly connected with the end of the centering connecting rod away from the centering rack; the brake rotary disc part is rotationally arranged on the end face of the axial pushing disc facing the supporting and clamping mechanism, and the brake rotary disc part is used for abutting against the end of the drive axle body; The edge of the brake rotary disc part is provided with a plurality of tooth grooves; the brake unit comprises a brake cylinder, a connecting seat and a plurality of radial movable seats, the brake cylinder is fixed at the center position of the end face of the axial pushing disc away from the supporting and clamping mechanism, and the connecting seat is arranged at the telescopic end of the brake cylinder; The plurality of radial movable seats are circumferentially distributed at the edge of the axial pushing disc, the radial movable seats can slide radially on the axial pushing disc, the end of the radial movable seat is provided with a brake tooth body located at the end face of the axial pushing disc facing the supporting and clamping mechanism, and the brake tooth body can be clamped into the tooth groove; and the connecting seat and the plurality of radial movable seats are connected through a brake connecting rod.

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