An efficient welding fixture clamp for automobile drive axle

Abstract

The application provides a kind of automobile drive axle high-efficiency welding tool clamp, relating to the technical field of automobile manufacturing, the tool clamp includes tool base and two symmetrically arranged supporting clamping mechanisms. Each mechanism includes a fixed clamp holder, a movable clamp holder, and an upper and lower rolling support, a semicircular adjusting plate, a driving member, and a steering adjusting member disposed thereon. The centering mechanism enables automatic centering of the drive axle in the horizontal direction. The rolling support switches the support mode under the action of the steering adjusting member, limiting axial movement. After the movable clamp holder is closed, the driving member rotates the semicircular adjusting plate, pushing the rolling support to move radially, achieving vertical positioning and compression of the drive axle, while allowing the drive axle to rotate around the axis, facilitating multi-directional welding. The application has the advantages of high positioning accuracy, stable clamping, and easy operation, significantly improving the welding efficiency and quality of the drive axle.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, and in particular to a high-efficiency welding fixture for automobile drive axles. Background Technology

[0002] As a key component of a vehicle's transmission system, the drive axle is primarily used to transmit power, bear loads, and enable differential function. Its structural strength and welding quality directly affect the safety and reliability of the entire vehicle. Drive axles are typically welded from components such as the axle housing, axle sleeves, and the main reducer housing, and are characterized by complex structures, numerous welds, and high precision requirements.

[0003] Currently, welding of automotive drive axles suffers from the following drawbacks: Welding of drive axles often relies on manual positioning and fixing, resulting in low positioning accuracy, poor clamping efficiency, and high labor intensity. This is particularly true during centering adjustments and circumferential welding, where repeated adjustments to the workpiece angle and position are necessary, severely impacting welding consistency and production efficiency. With the automotive industry's increasing demands for lightweight and high-strength manufacturing, developing a high-efficiency welding fixture capable of rapid centering, reliable clamping, and rotational adjustment has become an urgent need in the drive axle manufacturing field. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency welding fixture for automotive drive axles to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-efficiency welding fixture for automotive drive axles includes a fixture base that can be fixed to a welding equipment and two supporting and clamping mechanisms for supporting and clamping the two ends of the drive axle body. The two supporting and clamping mechanisms are respectively located at both ends of the fixture base. Each supporting and clamping mechanism includes a fixed clamp and a movable clamp. The fixed clamp is fixed to the end of the drive axle body via a base frame. The movable clamp is located above the fixed clamp and can rotate around one side of the fixed clamp to open and close. When closed, both the fixed and movable clamps form a circular cavity that can be locked onto the outer side of the end of the drive axle body. Two lower rolling supports are provided on both ends of the fixed clamp, and upper rolling supports are provided on both ends of the movable clamp. The lower and upper rolling supports on the same side are evenly distributed circumferentially. Each movable clamp is equipped with a semi-circular adjusting plate that rotates and slides on it. When the fixed clamp and the movable clamp are closed, the two semi-circular adjusting plates form a central ring that rotates around the cavity. The fixed clamp is equipped with a driving component, which is connected to one of the semi-circular adjusting plates and drives it to rotate on the fixed clamp. The rotating two semi-circular adjusting plates can drive the lower rolling support and the upper rolling support to move radially synchronously relative to the center of the cavity. The fixed clamp is also equipped with a steering adjusting component, which is connected to both lower rolling supports and can drive them to rotate around their own center. The drive axle body is also equipped with a centering mechanism, with both ends of the centering mechanism extending to the outside of the two supporting clamping mechanisms. The centering mechanism can abut against both ends of the drive axle body and apply axial force synchronously to its center.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In one alternative embodiment: both the lower rolling support and the upper rolling support include a top support rod and a top support clamping wheel. The top support rod is fitted with an axially sliding sleeve portion. In the lower rolling support, the sleeve portion is rotatably mounted on the end face of the fixed clamping seat via a mounting base, and the sleeve portion is also connected to a steering adjustment component. In the upper rolling support, the sleeve portion is fixed on the end face of the movable clamping seat via a mounting base. The top support clamping wheel is located at the end of the top support rod pointing towards the center of the cavity, and the tail end of the top support rod is connected to a semi-circular adjustment plate.

[0009] In one alternative embodiment: the tail end of the top support rod is provided with a tail plate that rotates with it, and an extension rod is provided on the tail plate; the semi-circular adjustment plate is provided with two arc-shaped clamping grooves, and the center of the arc-shaped clamping grooves is offset from the center of the semi-circular adjustment plate; the extension rod extends into the corresponding arc-shaped clamping groove, and a clamping arc rack is also provided on the outer edge of the semi-circular adjustment plate; the driving component includes a dual-axis clamping motor and two clamping gears respectively provided on the two output ends of the dual-axis clamping motor; the dual-axis clamping motor is fixed to the side of the fixed clamping seat, and the clamping gears mesh with the clamping arc rack located on the same side.

[0010] In one alternative embodiment: a sector gear portion is provided on the outer wall of the sleeve portion; the steering adjustment component includes a steering adjustment unit and a steering drive assembly; the steering adjustment unit is rotatably and slidably disposed on the end face of the fixed clamp; both ends of the steering adjustment unit have self-rotating racks that mesh with the two sector gear portions respectively; a middle rod is provided in the middle of the steering adjustment unit; the steering drive assembly is disposed at the lower end of the fixed clamp, with both ends extending to the two sides of the fixed clamp respectively and connected to the middle rod; the steering drive assembly can act on the middle rod to rotate around the center of the cavity.

[0011] In one alternative embodiment: the steering drive assembly includes a self-rotating drive shaft and a slide. The self-rotating drive shaft is rotatably mounted on the base frame. A steering adjustment helical section is located at the middle of the self-rotating drive shaft. The slide is slidably mounted on the bottom of the fixed clamp. The steering adjustment helical section spirally passes through the slide. Side rods are provided at both ends of the slide. The side rods extend to the side of the fixed clamp and are provided with guide holes. The self-rotating drive shaft extends into the guide holes. A handwheel is provided at the end of the self-rotating drive shaft.

[0012] In one alternative: the movable clamp is provided with an outer support arm on its side, the outer support arm being rotatably connected to the side of the fixed clamp, the movable clamp is provided with a protrusion on the other side, and a fixed protrusion opposite to the protrusion is fixed on the other side of the movable clamp, and a rotatable blocking block is provided on the fixed protrusion.

[0013] In one alternative embodiment: the centering mechanism includes a centering drive assembly and two centering actuation assemblies. The centering drive assembly includes a centering motor and two centering racks slidably mounted on the tooling base. The centering motor is fixed in the middle of the tooling base and has a centering gear at its output end. The centering racks are located on both sides of the centering motor and mesh with the centering gears from both sides. Each centering rack is provided with a centering connecting rod, which is connected to the centering actuation assembly on the same side. The two centering actuation assemblies are located on opposite sides of the two supporting and clamping mechanisms.

[0014] In one alternative embodiment: the centering jacking assembly includes an axial pushing disc, a brake disc, and a braking unit. The axial pushing disc is disposed opposite to the supporting clamping mechanism and fixedly connected to the end of the centering linkage away from the centering rack. The brake disc is rotatably disposed on the end face of the axial pushing disc facing the supporting clamping mechanism and is used to abut against the end of the drive axle body. The edge of the brake disc is provided with multiple tooth grooves. The braking unit includes a brake cylinder, a connecting seat, and multiple radially movable seats. The brake cylinder is fixed at the center position of the end face of the axial pushing disc away from the supporting clamping mechanism. The connecting seat is disposed at the telescopic end of the brake cylinder. The multiple radially movable seats are circumferentially distributed on the edge of the axial pushing disc and can slide radially on the axial pushing disc. The end of the radially movable seat is provided with a brake tooth located on the end face of the axial pushing disc facing the supporting clamping mechanism, and the brake tooth can be engaged in the tooth groove. The connecting seat and the multiple radially movable seats are connected by a brake linkage.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects:

[0016] The high-efficiency welding fixture for automotive drive axles provided by this invention achieves automatic horizontal centering and positioning of the drive axle by synchronously applying axial force through a centering mechanism and in conjunction with a rolling support structure, significantly improving positioning accuracy and consistency. Utilizing circumferentially arranged rolling supports and a rotatable semi-circular adjusting plate, the drive axle can rotate freely around its axis while being radially clamped, facilitating multi-angle welding and improving welding accessibility and quality. The fixed and movable clamps form a rigid circular cavity structure after closure, enhancing overall rigidity. Coordinated control of the drive components and steering adjustment components enables one-button clamping and release, greatly improving clamping efficiency and reducing operational burden. It can adapt to the clamping requirements of drive axles of different specifications, possessing good versatility and expandability, and is suitable for automated production lines and robotic welding systems. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the drive axle main body mounting structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the high-efficiency welding fixture for automotive drive axles in this invention.

[0020] Figure 3This is a schematic diagram of the supporting and clamping mechanism in one embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the lower rolling support structure in one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the steering drive component structure in one embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the centering and jacking component structure in one embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the braking unit structure in one embodiment of the present invention.

[0025] Figure reference numerals: Drive axle body 100, tooling base 200, support and clamping mechanism 300, fixed clamp 310, fixed protrusion 311, blocking block 312, movable clamp 320, outer support arm 321, protrusion 322, base frame 330, lower rolling support 340, top support rod 341, mounting base 342, sleeve 343, sector gear 344, top support clamping wheel 345, tail plate 346, extension rod 347, upper rolling support 350, semi-circular adjusting plate 360, arc-shaped clamping groove 361, clamping arc rack 362, steering adjustment unit 370, intermediate rod 371, self-rotating mechanism The components include: rack 372, steering drive assembly 380, self-rotating drive shaft 381, steering adjustment screw section 382, ​​handwheel 383, slide block 384, side rod 385, guide hole 386, dual-axis clamping motor 390, clamping gear 391, centering drive assembly 400, centering motor 410, centering gear 420, centering rack 430, centering connecting rod 440, centering jacking assembly 500, axial push disk 510, brake turntable part 520, tooth groove 521, brake unit 530, brake cylinder part 531, radial movable seat 532, brake tooth body 533, connecting seat 534, and brake connecting rod 535. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0028] In one embodiment, such as Figures 1-4As shown, a high-efficiency welding fixture for automotive drive axles includes a fixture base 200 that can be fixed on a welding equipment and two supporting and clamping mechanisms 300 for supporting and clamping both ends of the drive axle body 100. The two supporting and clamping mechanisms 300 are respectively located at both ends of the fixture base 200. Each supporting and clamping mechanism 300 includes a fixed clamping seat 310 and a movable clamping seat 320. The fixed clamping seat 310 is fixed to the end of the drive axle body 100 via a base frame 330, and the movable clamping seat 320... Located on the upper side of the fixed clamp 310, the movable clamp 320 can rotate around one side of the fixed clamp 310 to achieve opening and closing. When the fixed clamp 310 and the movable clamp 320 are closed, they can form a circular cavity that can be locked onto the outer side of the end of the drive axle body 100. Two lower rolling supports 340 are provided on both ends of the fixed clamp 310, and upper rolling supports 350 are provided on both ends of the movable clamp 320. The lower rolling supports 340 and the upper rolling supports 350 on the same side are circumferentially... The fixed clamp 310 and the movable clamp 320 are both evenly distributed with semi-circular adjusting plates 360 that rotate and slide on them. When the fixed clamp 310 and the movable clamp 320 are closed, the two semi-circular adjusting plates 360 form a central ring that rotates around the cavity. The fixed clamp 310 is provided with a driving member, which is connected to one of the semi-circular adjusting plates 360 and drives it to rotate on the fixed clamp 310. The rotating two semi-circular adjusting plates 360 can drive the downward rolling... The support member 340 and the upper rolling support member 350 move radially synchronously relative to the center of the cavity; the fixed clamp 310 is also provided with a steering adjustment member, which is connected to both lower rolling support members 340 and can drive them to rotate around their own center; the drive axle body 100 is also provided with a centering mechanism, the two ends of which extend to the outside of the two supporting clamping mechanisms 300 respectively, and the centering mechanism can abut against both ends of the drive axle body 100 and synchronously apply axial force to its center.

[0029] In this embodiment of the invention, in the initial state, the fixed clamping seat 310 and the movable clamping seat 320 of the two supporting clamping mechanisms 300 are in the unfolded state. The drive axle body 100 can be placed on the entire tooling by a robot or manually. Both ends of the drive axle body 100 are on the fixed clamping seat 310 and are axially rolled by the ends of the upper rolling support members 350 pointing towards the center of the cavity. The centering mechanism starts to work, and its two ends simultaneously approach the ends of the drive axle body 100. One end first contacts the end of the drive axle body 100 and applies an axial force to it. Due to the axial rolling of the upper rolling support member 350... The drive axle body 100 is dynamically supported and can move freely axially. 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 of the two supporting clamping mechanisms 300, thereby automatically achieving centering and horizontal positioning. After centering, the steering adjustment component drives the two lower rolling support members 340 to rotate around their own center, so that the ends of the lower rolling support members 340 support the ends of the drive axle body 100 in a circumferential rolling manner, which can limit the axial movement of the drive axle body 100 to a certain extent. The movable clamp 320 begins to move and gradually engages with the fixed clamp 310. The lower rolling support 340 and the upper rolling support 350 both point towards the center of the cavity, and the two semi-circular adjusting plates 360 are opposite each other and abut against each other. The driving member drives the semi-circular adjusting plates 360 to rotate around the center of the cavity. The rotating two semi-circular 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 cavity. The ends of the lower rolling support 340 and the upper rolling support 350 act on the ends of the drive axle body 100 to drive the drive axle body 100 to move to the center position of the cavity. This achieves vertical positioning, and both semicircular adjustment plates 360 are partially located on the end faces of the fixed clamp 310 and the movable clamp 320, which can improve the connection strength between the fixed clamp 310 and the movable clamp 320. Since the ends of the lower rolling support 340 and the upper rolling support 350 are pressed against the end of the drive axle body 100 in a circumferential rolling manner, the drive axle body 100 can rotate freely around its center line, which facilitates the adjustment of the upward-facing surface of the drive axle body 100 to adapt to the welding equipment to fully weld the outer surface of the drive axle body 100. The entire drive axle body 100 is easy to install.

[0030] In one embodiment, such as Figures 2-4As shown, both the lower rolling support 340 and the upper rolling support 350 include a top support rod 341 and a top support clamping wheel 345. The top support rod 341 is fitted with an axially sliding sleeve portion 343. In the lower rolling support 340, the sleeve portion 343 is rotatably mounted on the end face of the fixed clamping seat 310 via a mounting base 342, and the sleeve portion 343 is also connected to a steering adjustment component. In the upper rolling support 350, the sleeve portion 343 is fixed to the end face of the movable clamping seat 320 via a mounting base 342. The top support clamping wheel 345 is located at the end of the top support rod 341 pointing towards the center of the cavity, and the tail end of the top support rod 341 is connected to a semi-circular adjusting plate 360. In this embodiment of the invention, in the initial state, the top support clamping wheel 345 can axially roll and support the end of the drive axle body 100, allowing the drive axle body 100 to move freely axially and be driven by a centering mechanism. Axial movement is achieved to achieve horizontal positioning; the steering adjustment assembly drives the sleeve portion 343 in the lower rolling support 340 to rotate, so that the top support rod 341 and the top support clamping wheel 345 rotate 90 degrees. The top support clamping wheel 345 changes from axial rolling support of the end of the drive axle body 100 to circumferential rolling support of 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 full welding of the surface of the drive axle body 100; the rotating semi-circular adjustment plate 360 ​​acts on the tail of the top support rod 341 to achieve axial movement of the top support rod 341 relative to the sleeve portion 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 cavity, so that the drive axle body 100 moves vertically and is located at the center of the cavity, thereby achieving vertical positioning.

[0031] In one embodiment, such as Figures 2-4As shown, the tail of the top support rod 341 is provided with a tail plate 346 that rotates with it, and an extension rod 347 is provided on the tail plate 346. The semi-circular adjusting plate 360 ​​is provided with two arc-shaped clamping grooves 361, and the center of the arc-shaped clamping grooves 361 is offset from the center of the semi-circular adjusting plate 360. The extension rod 347 extends into the corresponding arc-shaped clamping grooves 361. A clamping arc rack 362 is also provided on the outer edge of the semi-circular adjusting plate 360. The driving component includes a dual-axis clamping motor 390 and two clamping gears 391 respectively provided on the two output ends of the dual-axis clamping motor 390. The dual-axis clamping motor 390 is fixed. Fixed on the side of the fixed clamping seat 310, the clamping gear 391 meshes with the clamping arc rack 362 located on the same side; in this embodiment of the invention, the dual-axis clamping motor 390 works and drives the clamping gear 391 to rotate. The clamping gear 391 meshes with the clamping arc rack 362, causing the semi-circular adjusting plate 360 ​​to rotate around the center of the circular cavity. The arc-shaped clamping groove 361 moves and acts on the extension rod 347, causing the tail plate 346 and the top support rod 341 to move radially. When the extension rod 347 is located at one end of the arc-shaped clamping groove 361, the top support clamping wheel 345 contacts the end outer wall of the drive axle body 100.

[0032] In one embodiment, such as Figures 2-4 As shown, a sector gear portion 344 is provided on the outer wall of the sleeve portion 343. The steering adjustment component includes a steering adjustment unit 370 and a steering drive assembly 380. The steering adjustment unit 370 is rotatably and slidably disposed on the end face of the fixed clamp 310. Both ends of the steering adjustment unit 370 have self-rotating racks 372 that mesh with the two sector gear portions 344 respectively. A middle rod 371 is provided in the middle of the steering adjustment unit 370. The steering drive assembly 380 is disposed at the lower end of the fixed clamp 310, with both ends extending to the two sides of the fixed clamp 310 and connected to the middle rod 371. 80 can act on the intermediate rod 371 to rotate around the center of the cavity; in this embodiment of the invention, after adjusting the horizontal position of the drive axle body 100, the steering drive assembly 380 acts on the intermediate rod 371 and makes it rotate around the center of the cavity. The steering adjustment unit 370 and the self-rotating rack 372 follow the rotation of the intermediate rod 371. The self-rotating rack 372 causes the sleeve part 343 to rotate by meshing with the sector gear part 344, and the top support rod 341 rotates so that the rolling direction of the top support clamping wheel 345 changes from axial rolling support of the end of the drive axle body 100 to circumferential rolling support of the end of the drive axle body 100.

[0033] In one embodiment, such as 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.

[0034] 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.

[0035] In one embodiment, such as Figure 2 , Figure 6 and Figure 7As shown, the centering mechanism includes a centering drive assembly 400 and two centering actuation assemblies 500. The centering drive assembly 400 includes a centering motor 410 and two centering racks 430 slidably mounted on the tooling base 200. The centering motor 410 is fixed in the middle of the tooling base 200, and its output end has a centering gear 420. The centering racks 430 are located on both sides of the centering motor 410 and mesh with the centering gears 420 from both sides. Each centering rack 430 is provided with a centering connecting rod 440, which is connected to the centering actuation assembly 500 on the same side. The two centering actuation assemblies 500 are respectively... Located on opposite sides of the two supporting clamping mechanisms 300; in this embodiment of the invention, the centering motor 410 starts working and meshes with the two centering racks 430 through the centering gear 420, which allows the centering racks 430 to move synchronously in opposite directions. The centering connecting rod 440 and the centering jacking assembly 500 move with the opposite centering racks 430, thereby causing the two centering jacking assemblies 500 to move away from or towards each other. When they are close, the two centering jacking assemblies 500 apply axial force to the drive axle body 100 from the end, which allows the drive axle body 100 to be positioned at the horizontal center of the entire tooling fixture, facilitating precise positioning of the welding device and improving welding accuracy.

[0036] In one embodiment, such as Figure 2 , Figure 6 and Figure 7As shown, the centering jacking assembly 500 includes an axial pushing disk 510, a brake disc 520, and a braking unit 530. The axial pushing disk 510 is disposed opposite to the supporting clamping mechanism 300 and fixedly connected to the end of the centering connecting rod 440 away from the centering rack 430. The brake disc 520 is rotatably disposed on the end face of the axial pushing disk 510 facing the supporting clamping mechanism 300, and the brake disc 520 is used to abut against the end of the drive axle body 100. The edge of the brake disc 520 is provided with multiple... Gear groove 521; The braking unit 530 includes a brake cylinder component 531, a connecting seat 534, and multiple radially movable seats 532. The brake cylinder component 531 is fixed at the center of the end face of the axial push disk 510 away from the supporting clamping mechanism 300. The connecting seat 534 is located at the telescopic end of the brake cylinder component 531. The multiple radially movable seats 532 are circumferentially distributed at the edge of the axial push disk 510. The radially movable seats 532 can slide radially on the axial push disk 510. The ends of the radially movable seats 532 are provided with A brake tooth 533 is located on the axial push disk 510 facing the end face of the supporting clamping mechanism 300, and the brake tooth 533 can be engaged in the tooth groove 521; the connecting seat 534 and the plurality of radially movable seats 532 are connected by a brake link 535; in this embodiment of the invention, one end of the brake link 535 is hinged to the connecting seat 534 and the other end is hinged to the radially movable seat 532; the brake turntable part 520 abuts against the end of the drive axle body 100, and when adjusting the position of the welding surface of the drive axle body 100, the brake... The rotating disc 520 can rotate with the drive axle body 100. After adjustment, the brake cylinder 531 extends and pushes the connecting seat 534 away from the axial push disc 510. The connecting seat 534 pulls multiple radially movable seats 532 toward the center of the axial push disc 510 through the brake linkage 535. The brake tooth 533 moves with the radially movable seats 532 and gradually engages in the tooth groove 521, thereby effectively limiting the rotation of the brake disc 520 and achieving the stability of the drive axle body 100 after adjusting the welding surface.

[0037] The above embodiment provides a high-efficiency welding fixture for automotive drive axles, and its specific implementation process is as follows:

[0038] I. Initial State and Material Feeding

[0039] In the initial state, the fixed clamping seat 310 and the movable clamping seat 320 of the two supporting clamping mechanisms 300 are in the unfolded state. The drive axle body 100 is placed on the tooling base 200 by a robot or manually, with its two ends placed on the two fixed clamping seats 310 respectively, and supported axially by the top support clamping wheel 345 of the upper rolling support 350. At this time, the drive axle body 100 can move freely along the axial direction.

[0040] II. Horizontal centering and positioning

[0041] Start the centering mechanism: The centering motor 410 starts, drives the centering gear 420 to rotate, drives the centering racks 430 on both sides to move in opposite directions in a synchronous manner, and pushes the centering connecting rod 440 and the centering jacking assembly 500 closer to the end of the drive axle body 100.

[0042] Axial force is applied to achieve horizontal alignment: The brake disc 520 in the alignment jacking assembly 500 first contacts one end of the drive axle body 100 and applies axial force. Since both ends of the drive axle body 100 are axially rolled and supported by the top support clamping wheels 345, it can move freely axially. When the other end also contacts the alignment jacking assembly 500, the drive axle body 100 is pushed to the symmetrical center position of the two supporting clamping mechanisms 300, completing the horizontal alignment and positioning.

[0043] III. Switching Support Methods and Clamping

[0044] Switching the support mode of the lower rolling support: Turning the handwheel 383 of the steering drive assembly 380 drives the self-rotating drive shaft 381 to rotate. This, through the steering adjustment screw section 382, ​​pushes the slide 384 to move radially, causing the side rod 385 to act on the middle rod 371 of the steering adjustment unit 370, making it rotate around the center of the cavity. The self-rotating racks 372 at both ends of the steering adjustment unit 370 mesh with the sector gears 344 of the lower rolling support 340, driving the sleeve 343 to rotate 90°, switching the top support clamping wheel 345 from axial rolling support to circumferential rolling support, restricting the axial movement of the drive axle body 100 while allowing it to rotate around the axis.

[0045] Close the movable clamp: Rotate the movable clamp 320 around the outer support arm 321 so that it engages with the fixed clamp 310, forming a circular cavity surrounding the end of the drive axle body 100. Rotate the blocking block 312 so that it engages with the upper side of the protrusion 322, locking the position of the movable clamp 320.

[0046] IV. Vertical Positioning and Clamping

[0047] Drive the semi-circular adjustment plate to rotate: The dual-axis clamping motor 390 starts, driving the clamping gear 391 to rotate, which meshes with the clamping arc rack 362 of the semi-circular adjustment plate 360, causing the two semi-circular adjustment plates 360 to rotate synchronously around the center of the cavity.

[0048] Radial adjustment of the support position: The arc-shaped clamping groove 361 on the semi-circular adjusting plate 360 ​​pushes the extension rod 347, causing the tail plate 346 and the top support rod 341 to move radially, causing the top support clamping wheels 345 of the lower rolling support 340 and the upper rolling support 350 to retract towards the center of the cavity, pushing the end of the drive axle body 100 to the center of the cavity, completing the vertical positioning. At this time, the top support clamping wheel 345 presses the drive axle body 100 in a circumferential rolling manner, allowing it to rotate around the axis.

[0049] V. Welding Surface Adjustment and Locking

[0050] Adjusting the 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.

[0051] Locking the rotation position: Activate the brake cylinder 531 to push the connecting seat 534 to move. The brake linkage 535 pulls the radial movable seat 532 to slide towards the center, so that the brake tooth 533 is engaged in the tooth groove 521 of the brake disc part 520, locking the rotation position of the brake disc part 520 and the drive axle body 100 to ensure the stability of the workpiece during the welding process.

[0052] VI. Welding and Unloading

[0053] 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 braking unit 530, then reverse the dual-axis clamping motor 390 to loosen the top support clamping wheel 345, open the movable clamping seat 320, and finally remove the centering jacking assembly 500 through the centering mechanism to take out the welded drive axle body 100.

[0054] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A high-efficiency welding fixture for automotive drive axles, comprising a fixture base that can be fixed on a welding equipment and two supporting and clamping mechanisms for supporting and clamping both ends of the drive axle body, the two supporting and clamping mechanisms being respectively disposed at both ends of the fixture base, characterized in that, The supporting and clamping mechanism includes a fixed clamp and a movable clamp; The fixed clamp is fixed to the end of the drive axle body via the base frame. The movable clamp is located on the upper side of the fixed clamp. The movable clamp can rotate around one side of the fixed clamp to open and close. When the fixed clamp and the movable clamp are closed, they can form a circular cavity that can be locked on the outside of the end of the drive axle body. Two lower rolling supports are provided on both ends of the fixed clamp, and upper rolling supports are provided on both ends of the movable clamp. The lower rolling supports and upper rolling supports on the same side are evenly distributed circumferentially. Both the fixed and movable clamps are equipped with semi-circular adjusting plates that rotate and slide on them. When the fixed and movable clamps are closed, the two semi-circular adjusting plates form a central ring that rotates around the cavity. The fixed clamp is equipped with a driving component, which is connected to one of the semi-circular adjusting plates and drives it to rotate on the fixed clamp. The rotating two semi-circular adjusting plates can drive the lower rolling support and the upper rolling support to move radially synchronously relative to the center of the cavity. The fixed clamp is also provided with a steering adjustment component, which is connected to two lower rolling support components and can drive them to rotate around their own center; the drive axle body is also provided with a centering mechanism, which extends to the outside of the two supporting clamping mechanisms at both ends. The centering mechanism can abut against both ends of the drive axle body and apply axial force synchronously to its center.

2. The high-efficiency welding fixture for automotive drive axles according to claim 1, characterized in that, Both the lower rolling support and the upper rolling support include a top support rod and a top support clamping wheel. The top support rod is fitted with an axially sliding sleeve portion. In the lower rolling support, the sleeve part is rotatably mounted on the end face of the fixed clamp via the mounting seat, and the sleeve part is also connected to the steering adjustment part. In the upper rolling support, the sleeve portion is fixed to the end face of the movable clamp by a mounting seat; The top support clamping wheel is located at the end of the top support rod pointing towards the center of the circular cavity, and the tail end of the top support rod is connected to the semi-circular adjusting plate.

3. The high-efficiency welding fixture for automotive drive axles according to claim 2, characterized in that, The top support rod is provided with a tail plate that rotates with it, and an extension rod is provided on the tail plate. The semi-circular adjustment plate is provided with two arc-shaped clamping grooves and the center of the arc-shaped clamping grooves is offset from the center of the semi-circular adjustment plate. The extension rod extends into the corresponding arc-shaped clamping groove, and a clamping arc-shaped toothed rack is also provided on the outer edge of the semi-circular adjusting plate. The driving component includes a dual-axis clamping motor and two clamping gears respectively located on the two output ends of the dual-axis clamping motor. The dual-axis clamping motor is fixed to the side of the fixed clamping seat, and the clamping gears at its output ends mesh with the clamping arc rack.

4. The high-efficiency welding fixture for automotive drive axles according to claim 3, characterized in that, A sector gear portion is provided on the outer wall of the sleeve portion, and the steering adjustment component includes a steering adjustment unit and a steering drive assembly; The steering adjustment unit is rotatably and slidably mounted on the end face of the fixed clamp. Both ends of the steering adjustment unit have self-rotating racks that mesh with two sector gears respectively. A middle rod is provided in the middle of the steering adjustment unit. The steering drive assembly is located at the lower end of the fixed clamp, with its two ends extending to the two sides of the fixed clamp and connected to the middle rod. The steering drive assembly can act on the middle rod to rotate around the center of the cavity.

5. The high-efficiency welding fixture for automotive drive axles according to claim 4, characterized in that, The steering drive assembly includes a self-rotating drive rod shaft and a slide block. The self-rotating drive rod shaft is rotatably mounted on the base frame, and a steering adjustment helical section is located in the middle of the self-rotating drive rod shaft. The slide is slidably mounted on the bottom of the fixed clamp. The steering adjustment screw section spirals through the slide. Both ends of the slide are provided with side rods that extend to the side of the fixed clamp and are provided with guide holes. The self-rotation drive shaft extends into the guide holes. The end of the self-rotation drive shaft has a handwheel.

6. The high-efficiency welding fixture for automotive drive axles according to claim 1, characterized in that, The movable clamp is provided with an outer support arm on its side, which is rotatably connected to the side of the fixed clamp. The movable clamp is provided with a protrusion on its other side, and a fixed protrusion opposite to the protrusion is fixed on the other side of the movable clamp, and a rotatable blocking block is provided on the fixed protrusion.

7. The high-efficiency welding fixture for automotive drive axles according to any one of claims 1-6, characterized in that, The centering mechanism includes a centering drive component and two centering push-moving components; The centering drive assembly includes a centering motor and two centering racks that can be slidably mounted on the tooling base. The centering motor is fixed in the middle of the tooling base, and its output end has a centering gear. The centering rack is located on both sides of the centering motor and meshes with the centering gear from both sides. Each centering rack is equipped with a centering link, which is connected to the centering jacking assembly on the same side. The two centering jacking assemblies are located on opposite sides of the two supporting and clamping mechanisms.

8. The high-efficiency welding fixture for automotive drive axles according to claim 7, characterized in that, The centering and jacking assembly includes an axial pushing disc, a braking turntable, and a braking unit; The axial push disk is disposed opposite to the support and clamping mechanism and is fixedly connected to the end of the centering link away from the centering rack; the brake turntable is rotatably disposed on the end face of the axial push disk facing the support and clamping mechanism, and the brake turntable is used to abut against the end of the drive axle body. The edge of the brake disc is provided with multiple toothed grooves; the brake unit includes a brake cylinder component, a connecting seat and multiple radially movable seats. The brake cylinder component is fixed at the center of the end face of the axial push disc away from the support and clamping mechanism, and the connecting seat is located at the telescopic end of the brake cylinder component. Multiple radially movable seats are circumferentially distributed on the edge of the axially pushing disk. The radially movable seats can slide radially on the axially pushing disk. The ends of the radially movable seats are provided with brake teeth located on the end face of the axially pushing disk facing the supporting clamping mechanism. The brake teeth can be engaged in the tooth groove. The connecting seat and the multiple radially movable seats are connected by a brake linkage.

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