Differential shell and gear laser welding clamp

Abstract

The invention discloses a differential shell and gear laser welding clamp, relates to the technical field of welding clamps, and aims to solve the problems of low positioning precision and welding deformation caused by unbalanced pressing force of an existing clamp, the clamp adopts a multi-layer collaborative structure: an annular rod is fixed by a mounting frame, and a gear clamping assembly clamps a gear in a self-adaptive manner through an elastic pressing block; the differential mechanism clamping assembly comprises a rotating ring and a hinged transmission rod, and a clamping block is driven to be locked on the symmetrical face of the shell. The lifting assembly integrates an electric lifting column and a fixing disc and is in linkage with clamping and pressing actions of the differential mechanism. The adjustable pressing assembly is a core innovation, a pressure sensor of the adjustable pressing assembly monitors stress of a pressing column in real time, a force adjusting assembly dynamically adjusts the height of each pressing cylinder according to feedback data, and pressure balance is achieved. The welding coaxiality is remarkably improved, the thermal deformation defect is eliminated, the device is suitable for various shells with different diameters, the remodeling efficiency is higher, and the welding qualification rate is higher.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically a laser welding fixture for differential housings and gears. Background Technology

[0002] Differentials are widely used in the automotive industry. A differential consists of left and right half-shaft gears, two planetary gears, a gear carrier, and a differential housing. Its function is to allow the left and right wheels to rotate at different speeds when the vehicle is turning, ensuring that the drive wheels on both sides perform pure rolling motion. To meet the high-quality requirements of the entire vehicle, the design and manufacturing of differential assemblies have become increasingly refined. The differential housing and gears are two important components of the differential assembly, and currently, laser welding technology is commonly used to connect them. Existing welding fixtures use hydraulic mechanisms to position and clamp the weldment.

[0003] Traditional welding fixtures have significant drawbacks: the differential housing has an irregular structure, and uneven force during clamping can easily cause misalignment between the housing and the gear, requiring repeated manual calibration; during the welding process, local thermal stress concentration can easily lead to housing deformation or weld misalignment if the clamping force is inconsistent, making it difficult to maintain welding stability and resulting in poor welding quality.

[0004] With the widespread adoption of high-power laser welding technology, higher demands are being placed on the intelligence, adaptability, and stability of welding fixtures. Therefore, there is an urgent need for a welding fixture that can automatically adjust clamping force, ensure coaxiality, and adapt to various models. Summary of the Invention

[0005] This invention provides a laser welding fixture for differential housings and gears, which solves the problems of traditional welding fixtures in the prior art that cannot flexibly adjust the clamping force according to the actual structure of the differential, the clamping force is unevenly applied, and it is difficult to maintain welding stability, resulting in poor welding quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A laser welding fixture for a differential housing and gears includes a mounting frame. A ring rod is fixedly connected to the mounting frame, and a gear clamping assembly is mounted on the ring rod. A movable groove is formed at the bottom of the ring rod, and a differential clamping assembly is movably mounted below the movable groove. A lifting assembly is mounted below the differential clamping assembly. The lifting assembly includes a fixed plate, which is movably connected to the differential clamping assembly. An adjustable clamping assembly is mounted at the top of the lifting assembly. The adjustable clamping assembly includes a limiting cylinder, a movable arm is slidably mounted on the limiting cylinder, and a clamping cylinder is slidably inserted through the end of the movable arm. A pressure detection assembly is mounted on the clamping cylinder, and a force adjustment assembly is mounted on one side of the movable arm. The force adjustment assembly is connected to the clamping cylinder. The force adjustment assembly adjusts the clamping force at different clamping points to the same value according to the actual clamping force detected by the pressure detection assembly, thereby maintaining welding stability.

[0007] As a preferred embodiment of the present invention, the gear clamping assembly includes a movable arm that is slidably disposed on a ring rod, a clamping rod fixedly connected to one side of the end of the movable arm, an elastic element fixedly connected to one side of the inner wall of the clamping rod, and a pressing block fixedly connected to one end of the elastic element.

[0008] As a preferred embodiment of the present invention, a fixing stud is threaded through the annular rod above the movable arm, the fixing stud is correspondingly arranged with the movable arm, and a gear body is provided on the clamping rod, with both sides of the gear body contacting the clamping block.

[0009] As a preferred embodiment of the present invention, the differential clamping assembly includes a support frame, a rotating ring rotatably mounted on the support frame, a transmission rod hinged to the top of the rotating ring, an adjusting block slidably mounted in the movable groove, an elastic clamping post slidably passing through the adjusting block, a clamping block fixedly connected to the end of the elastic clamping post, a differential housing disposed between the clamping blocks, and the end of the transmission rod away from the rotating ring hinged to the end of the elastic clamping post.

[0010] As a preferred embodiment of the present invention, a positioning arm is fixedly connected to the rotating ring, a positioning stud is threaded through the positioning arm, one end of the positioning stud is in contact with the support frame, a fixing rod is fixedly connected to the side wall of the support frame, a positioning column is fixedly connected to the fixing rod, the positioning column is slidably connected to the fixing disk, and telescopic components are sleeved on the positioning columns on the upper and lower sides of the fixing disk.

[0011] As a preferred embodiment of the present invention, the lifting assembly further includes an electric lifting column fixedly mounted on the mounting frame. The telescopic end of the electric lifting column is fixedly connected to the fixed plate. An installation cylinder is fixedly mounted through the fixed plate. A transmission column is slidably mounted through the installation cylinder. A transmission arm is fixedly connected to the bottom of the transmission column. An electric adjusting column is fixedly connected between the transmission arm and the fixed plate.

[0012] As a preferred embodiment of the present invention, a linkage rod is hinged to the top side wall of the transmission column, and the end of the linkage rod away from the transmission column is hinged to the moving arm.

[0013] As a preferred embodiment of the present invention, the pressure detection assembly includes a pressure sensor fixedly disposed inside the clamping cylinder, a movable block fixedly connected to the end of the pressure sensor, a compression component fixedly connected to the bottom of the movable block, a clamping column fixedly connected to the bottom of the compression component, and the clamping column slidably connected to the clamping cylinder.

[0014] As a preferred embodiment of the present invention, the force adjustment component includes an electric telescopic column fixedly mounted on the movable arm, the telescopic end of the electric telescopic column being fixedly connected to the linkage arm, and one end of the linkage arm being fixedly connected to the clamping cylinder.

[0015] As a preferred embodiment of the present invention, an integrated controller is provided at the bottom of the mounting bracket, and the integrated controller is connected to the pressure sensor accordingly.

[0016] This invention offers the following advantages: the pressure detection component monitors the force at each clamping point in real time, and the force adjustment component flexibly adjusts the height of the clamping cylinder according to the force at each clamping point, ensuring that the pressure value at all clamping points is consistent and eliminating the risk of welding deformation. Simultaneously, the adjustable clamping component buffers thermal expansion, and combined with the pressure equalization mechanism, prevents localized high temperatures from causing housing warping. Through these methods, the stability of the differential housing can be better maintained during welding, ensuring more precise welding positions and higher welding quality.

[0017] The differential clamping assembly can rotate flexibly relative to the housing, thereby flexibly adjusting the clamping position according to different types of housings to ensure clamping on the symmetrical plane of the housing and prevent housing displacement. The gear clamping assembly enables rapid gear positioning, and the clamping assembly itself can flexibly adjust the clamping size to be compatible with gears of different diameters, thus expanding its application range.

[0018] The lifting assembly drives the fixed plate downwards, simultaneously pressing and clamping the housing, reducing operational steps. Simultaneously, the lifting assembly controls the extension and retraction of the moving arm, adjusting the radial range to accommodate various housing models. Overall, this device improves welding pass rates, reduces rework costs, shortens fixture changeover time, and is compatible with multiple differential models. No manual calibration is required, making operation convenient and increasing production efficiency. Attached Figure Description

[0019] Figure 1 A schematic diagram of a laser welding fixture for a differential housing and gears. Figure 1 .

[0020] Figure 2 A schematic diagram of a laser welding fixture for a differential housing and gears. Figure 2 .

[0021] Figure 3 A schematic diagram of a laser welding fixture for a differential housing and gears. Figure 3 .

[0022] Figure 4 A schematic diagram of a laser welding fixture for a differential housing and gears. Figure 4 .

[0023] Figure 5 This is a front structural schematic diagram of a laser welding fixture for a differential housing and gears.

[0024] Figure 6 This is a schematic cross-sectional view of a laser welding fixture for a differential housing and gears.

[0025] Figure 7 for Figure 6 A magnified structural diagram of A in the diagram.

[0026] Figure 8 This is a schematic diagram of an adjustable clamping assembly in a laser welding fixture for differential housings and gears.

[0027] Figure 9 This is a schematic diagram of the assembly structure of the differential housing and gear in a laser welding fixture for differential housing and gear.

[0028] In the diagram: 1. Mounting bracket; 2. Differential clamping assembly; 201. Bearing frame; 202. Rotating ring; 203. Drive rod; 204. Adjusting block; 205. Elastic clamping post; 206. Clamping block; 207. Fixing rod; 208. Positioning post; 209. Telescopic component; 210. Positioning arm; 211. Positioning stud; 3. Gear clamping assembly; 301. Movable arm; 302. Fixing stud; 303. Clamping rod; 304. Elastic component; 305. Pressing block; 4. Ring rod; 5. Lifting assembly; 5 01. Mounting cylinder; 502. Drive column; 503. Electric adjusting column; 504. Drive arm; 505. Electric lifting column; 506. Fixed plate; 6. Adjustable clamping assembly; 601. Limiting cylinder; 602. Moving arm; 603. Linkage rod; 604. Clamping cylinder; 605. Electric telescopic column; 606. Linkage arm; 607. Clamping column; 608. Pressure sensor; 609. Compression component; 610. Moving block; 7. Integrated controller; 8. Gear body; 9. Differential housing; 10. Movable groove. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] Please see Figures 1-9As an embodiment of the present invention, a laser welding fixture for a differential housing and gears includes a mounting frame 1. A ring rod 4 is fixedly connected to the mounting frame 1. A gear clamping assembly 3 is disposed on the ring rod 4. A movable groove 10 is formed at the bottom of the ring rod 4. A differential clamping assembly 2 is movably disposed below the movable groove 10. A lifting assembly 5 is disposed below the differential clamping assembly 2. The lifting assembly 5 includes a fixed plate 506, which is movably connected to the differential clamping assembly 2. An adjustable clamping assembly 6 is disposed at the top of the lifting assembly 5. The adjustable clamping assembly 6 includes a limiting cylinder 601. A moving arm 602 is slidably disposed on the limiting cylinder 601. A clamping cylinder 604 is slidably disposed through the end of the moving arm 602. A pressure detection assembly is disposed on the clamping cylinder 604. A force adjustment assembly is disposed on one side of the moving arm 602. The force adjustment assembly is connected to the clamping cylinder 604. The force adjustment assembly adjusts the clamping force at different clamping points to the same value according to the actual clamping force detected by the pressure detection assembly, thereby maintaining welding stability.

[0031] The pressure detection component monitors the actual clamping force at each clamping point in real time, and the force adjustment component dynamically adjusts the height of the clamping cylinder 604 to force the pressure values ​​at all clamping points to be close to the same, completely eliminating welding deformation and weld misalignment caused by uneven pressure. Addressing the unevenness of the inner bottom surface of the differential housing 9, the force adjustment component independently controls the stroke of each clamping cylinder 604 to compensate for differences in contact timing, ensuring that the clamping column 607 reaches the target pressure value synchronously after contacting the housing. The pressure equalization mechanism operates continuously, offsetting the localized thermal expansion stress generated by laser welding in real time, preventing micro-deformation of the housing during welding, and resulting in a higher weld pass rate.

[0032] Please see Figure 3 In another embodiment of the present invention, the gear clamping assembly 3 includes a movable arm 301 slidably disposed on an annular rod 4. A clamping rod 303 is fixedly connected to one end of the movable arm 301, and an elastic element 304 is fixedly connected to one side of the inner wall of the clamping rod 303. A pressing block 305 is fixedly connected to one end of the elastic element 304. The pressing block 305 is configured as a trapezoidal structure. A fixing stud 302 is threaded through the annular rod 4 above the movable arm 301. The fixing stud 302 is correspondingly disposed with the movable arm 301. A gear body 8 is disposed on the clamping rod 303. Both sides of the gear body 8 are in contact with the pressing block 305. In actual use, the movable arm 301 is moved to a size that matches the actual size of the gear body 8 according to the actual size of the gear body 8. Then, the movable arm 301 is fixed to the annular rod 4 by the fixing stud 302. Subsequently, the gear body 8 is placed between the pressing blocks 305. Under the action of the elastic element 304, the pressing block 305 limits the automatic positioning, clamping and fixing of the gear body 8.

[0033] See Figures 2-6The differential clamping assembly 2 includes a support frame 201, a rotating ring 202 rotatably mounted on the support frame 201, a transmission rod 203 hinged to the top of the rotating ring 202, an adjusting block 204 slidably mounted in the movable groove 10, an elastic clamping post 205 slidably passing through the adjusting block 204, a clamping block 206 fixedly connected to the end of the elastic clamping post 205, a differential housing 9 disposed between the clamping blocks 206, and the end of the transmission rod 203 away from the rotating ring 202 hinged to the end of the elastic clamping post 205.

[0034] A positioning arm 210 is fixedly connected to the rotating ring 202. A positioning stud 211 is threaded through the positioning arm 210. One end of the positioning stud 211 contacts the support frame 201. In actual use, the rotating ring 202 and the support frame 201 can be fixed by rotating the positioning stud 211. A fixing rod 207 is fixedly connected to the side wall of the support frame 201. A positioning post 208 is fixedly connected to the fixing rod 207. The positioning post 208 is slidably connected to the fixing disk 506. Telescopic parts 209 are sleeved on the positioning posts 208 on the upper and lower sides of the fixing disk 506. In actual use, when the fixing disk 506 moves down, it drives the rotating ring 202 above to move down, and then drives the elastic clamping post 205 to move through the transmission rod 203. Under the action of the clamping block 206, the shell is clamped and fixed.

[0035] See Figures 3-8 The lifting assembly 5 also includes an electric lifting column 505 fixedly mounted on the mounting frame 1. The telescopic end of the electric lifting column 505 is fixedly connected to the fixed plate 506. An installation cylinder 501 is fixedly inserted through the fixed plate 506. A transmission column 502 is slidably inserted through the installation cylinder 501. A transmission arm 504 is fixedly connected to the bottom of the transmission column 502. An electric adjusting column 503 is fixedly connected between the transmission arm 504 and the fixed plate 506. A linkage rod 603 is hinged to the top side wall of the transmission column 502. The end of the linkage rod 603 away from the transmission column 502 is hinged to the moving arm 602. In actual use, the extension and retraction of the electric adjusting column 503 can drive the transmission column 502 to move through the transmission arm 504. The linkage rod 603 at the end of the transmission column 502 can drive the moving arm 602 to move, thereby realizing the adjustment of the coverage diameter of the pressure detection assembly.

[0036] See Figures 7-8 The pressure detection assembly includes a pressure sensor 608 fixedly disposed inside the pressure cylinder 604. A movable block 610 is fixedly connected to the end of the pressure sensor 608. The movable block 610 is slidably disposed inside the pressure cylinder 604. A compression member 609 is fixedly connected to the bottom of the movable block 610. A pressure column 607 is fixedly connected to the bottom of the compression member 609. The pressure column 607 is slidably connected to the pressure cylinder 604.

[0037] See Figure 7The force adjustment component includes an electrically operated telescopic column 605 fixedly mounted on the movable arm 602. The telescopic end of the electrically operated telescopic column 605 is fixedly connected to the linkage arm 606, and one end of the linkage arm 606 is fixedly connected to the clamping cylinder 604. (See reference...) Figures 1-9 An integrated controller 7 is provided at the bottom of the mounting bracket 1, and the integrated controller 7 is connected to the pressure sensor 608.

[0038] In the implementation of this invention, the gear body 8 is first assembled with the differential housing 9 and placed on the device. Support is achieved by the clamping rod 303, and the gear body 8 is clamped and positioned by the clamping block 305 under the action of the elastic element 304. Simultaneously, the differential housing 9 is fitted onto the adjustable clamping assembly 6. The transmission arm 504 at the end of the electric adjusting column 503 can drive the transmission column 502 to move downwards relative to the mounting cylinder 501. The linkage rod 603 on the top side wall of the transmission column 502 rotates, causing the moving arm 602 to extend out of the limiting cylinder 601. The clamping cylinder 604 on one side of the bottom end of the moving arm 602 corresponds to the bottom wall of the differential housing 9. Since the differential housing 9 is not perfectly symmetrical, the operator can adjust the rotating ring 202 to move the top adjusting block 204 in the movable groove 10 via the transmission rod 203, rotating the clamping block 206 at the end of the elastic clamping column 205 to the differential housing. On the weighing surface, the rotating ring 202 and the support frame 201 are fixed by rotating the positioning stud 211. Finally, the fixed plate 506 is moved down by the electric lifting column 505. During the downward movement of the fixed plate 506, the support frame 201 between the fixed rods 207 is moved down by the telescopic component 209. The support frame 201 moves the elastic clamping column 205 closer to the differential housing 9 by the transmission rod 203 on the rotating ring 202, thereby achieving the clamping and fixing of the differential housing 9. In this clamping and fixing method, the position of the clamping block 206 is adjusted before clamping. For differential housings 9 of different shapes, the device can flexibly adjust the clamping point to ensure that the clamping is in a symmetrical position. In this way, it can be ensured that the differential housing 9 is in a coaxial position with the gear body 8 after clamping and fixing, ensuring alignment before welding, ensuring welding position accuracy, and eliminating the need for manual recalibration and alignment, thus improving welding efficiency. As the clamping block 206 clamps and fixes the differential housing 9, the device achieves lateral clamping and fixing of the gear body 8 and the differential housing 9. At this time, the fixing plate 506 continues to move downward under the action of the electric lifting column 505, and the telescopic part 209 is continuously compressed to increase the clamping force and the clamping stability is also higher. As the fixing plate 506 moves downward, it will drive the clamping cylinder 604 on the mounting cylinder 501 to move downward. The clamping column 607 at the bottom of the clamping cylinder 604 will contact the inner bottom wall of the differential housing 9 to achieve clamping of the differential housing 9. As the clamping force increases, the differential housing 9 and the gear body 8 are tightly fitted. In the above way, the device achieves quick alignment and clamping and fixing of the gear body 8 and the differential housing 9, which is convenient to operate and use, and has higher clamping and fixing efficiency. Because the differential housing 9 has an irregular structure, if the mounting cylinder 501 moves the clamping pins 607 at the bottom of the clamping cylinder 604 downwards simultaneously, the unevenness of the bottom of the differential housing 9 will result in different contact sequences between the clamping pins 607 at different positions and the bottom of the differential housing 9. This will lead to different compression amounts on the compression component 609, resulting in different pressures on the differential housing 9. Ultimately, when the housing is properly clamped, the different pressures exerted by the clamping pins 607 at different positions on the differential housing 9 may cause the clamping cylinder 604 to deflect, affecting the actual welding alignment. Even if deflection does not occur before welding, during the welding process, due to the high concentrated heat input of laser welding, localized high temperatures and thermal stress are easily generated in the thin-walled areas of the housing and near the gear end face. Uneven force distribution can easily cause deformation in the contact area between the gear and the housing, severely affecting welding quality and subsequent assembly accuracy. However, when this device is actually clamping, the pressure sensor 608 sends the final clamping pressure to the integrated controller 7. The integrated controller 7 controls the movement of the electric telescopic column 605, which in turn drives the clamping cylinder 604 up and down via the linkage arm 606, adjusting the compression amount of the compression component 609. This, in turn, adjusts the clamping force of the clamping column 607 on the housing, ensuring that the pressure applied by the clamping column 607 on the housing is consistent. This makes the housing subjected to uniform force, preventing it from deflecting during welding, ensuring welding quality and higher welding accuracy. At the same time, this device can adapt to differential housings 9 of different shapes, offering greater flexibility and better stability.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser welding fixture for a differential housing and gears, comprising a mounting bracket (1), characterized in that, A ring rod (4) is fixedly connected to the mounting bracket (1). A gear clamping assembly (3) is provided on the ring rod (4). A movable groove (10) is opened at the bottom of the ring rod (4). A differential clamping assembly (2) is movably arranged below the movable groove (10). A lifting assembly (5) is provided below the differential clamping assembly (2). The lifting assembly (5) includes a fixed plate (506). The fixed plate (506) is movably connected to the differential clamping assembly (2). An adjustable pressing assembly (6) is provided at the top of the lifting assembly (5). The adjustable pressing assembly (6) includes a limiting cylinder (601). A moving arm (602) is slidably arranged on the limiting cylinder (601). A pressing cylinder (604) is slidably inserted through the end of the moving arm (602). A pressure detection assembly is provided on the pressing cylinder (604). A force adjustment assembly is provided on one side of the moving arm (602). The force adjustment assembly adjusts the pressing force of different pressing points to the same value according to the actual pressing force detected by the pressure detection assembly, so as to maintain welding stability.

2. The differential housing and gear laser welding fixture according to claim 1, characterized in that, The gear clamping assembly (3) includes a movable arm (301) that slides through the ring rod (4), a clamping rod (303) that is fixedly connected to one side of the end of the movable arm (301), an elastic element (304) that is fixedly connected to one side of the inner wall of the clamping rod (303), and a pressing block (305) that is fixedly connected to one end of the elastic element (304).

3. The differential housing and gear laser welding fixture according to claim 2, characterized in that, A fixed stud (302) is threaded through the annular rod (4) above the movable arm (301). The fixed stud (302) is correspondingly arranged with the movable arm (301). A gear body (8) is provided on the clamping rod (303). The two sides of the gear body (8) are in contact with the clamping block (305).

4. A laser welding fixture for a differential housing and gears according to claim 3, characterized in that, The differential clamping assembly (2) includes a support frame (201), a rotating ring (202) is rotatably mounted on the support frame (201), a transmission rod (203) is hinged to the top of the rotating ring (202), an adjusting block (204) is slidably mounted in the movable groove (10), an elastic clamping column (205) is slidably mounted through the adjusting block (204), a clamping block (206) is fixedly connected to the end of the elastic clamping column (205), a differential housing (9) is mounted between the clamping blocks (206), and the end of the transmission rod (203) away from the rotating ring (202) is hinged to the end of the elastic clamping column (205).

5. A laser welding fixture for a differential housing and gears according to claim 4, characterized in that, The rotating ring (202) is fixedly connected to the positioning arm (210), and the positioning arm (210) is threaded through the positioning stud (211). One end of the positioning stud (211) is in contact with the support frame (201). The support frame (201) is fixedly connected to the side wall of the support frame (201), and the positioning post (208) is fixedly connected to the fixing post (207). The positioning post (208) is slidably connected to the fixed plate (506). The positioning post (209) is sleeved on the positioning post (208) on the upper and lower sides of the fixed plate (506).

6. A laser welding fixture for a differential housing and gears according to claim 1, characterized in that, The lifting assembly (5) also includes an electric lifting column (505) fixedly mounted on the mounting frame (1). The telescopic end of the electric lifting column (505) is fixedly connected to the fixed plate (506). An installation cylinder (501) is fixedly installed through the fixed plate (506). A transmission column (502) is slidably installed through the installation cylinder (501). A transmission arm (504) is fixedly connected to the bottom of the transmission column (502). An electric adjusting column (503) is fixedly connected between the transmission arm (504) and the fixed plate (506).

7. A laser welding fixture for a differential housing and gears according to claim 6, characterized in that, The top side wall of the transmission column (502) is hinged to the linkage rod (603), and the end of the linkage rod (603) away from the transmission column (502) is hinged to the moving arm (602).

8. A laser welding fixture for a differential housing and gears according to claim 7, characterized in that, The pressure detection assembly includes a pressure sensor (608) fixedly installed inside the pressure cylinder (604). The end of the pressure sensor (608) is fixedly connected to a movable block (610). The bottom of the movable block (610) is fixedly connected to a compression component (609). The bottom of the compression component (609) is fixedly connected to a pressure column (607). The pressure column (607) is slidably connected to the pressure cylinder (604).

9. A laser welding fixture for a differential housing and gears according to claim 8, characterized in that, The force adjustment component includes an electric telescopic column (605) fixedly mounted on the movable arm (602), the telescopic end of the electric telescopic column (605) is fixedly connected to the linkage arm (606), and one end of the linkage arm (606) is fixedly connected to the pressing cylinder (604).

10. A laser welding fixture for a differential housing and gears according to claim 9, characterized in that, An integrated controller (7) is provided at the bottom of the mounting bracket (1), and the integrated controller (7) is connected to the pressure sensor (608).

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