A differential housing surface polishing device

Abstract

The present invention belongs to the field of polishing technology, and specifically discloses a surface polishing device for a differential housing, which includes an outer frame. An inner groove is formed on the middle-end surface of the outer frame. A frame-shaped slider is slidably installed inside the inner groove. A cylinder is installed on the back of the outer frame, and the output end of the cylinder is connected to the frame-shaped slider. A polishing mechanism and a feeding mechanism are installed inside the frame-shaped slider, and the feeding mechanism is located above the polishing mechanism. An adjusting mechanism is arranged on the side of the polishing mechanism, and a flipping mechanism is arranged on the side of the feeding mechanism. Through the mutual cooperation among various mechanisms, the present invention can flip the feeding mechanism and the differential housing during the process of the frame-shaped slider moving outward from the outer frame, which is convenient for observation, disassembly and assembly. It can also make the polishing sand remaining in the housing fall back into the polishing frame, avoiding waste and pollution.

Description

Technical Field

[0001] The present invention belongs to the field of polishing, and specifically discloses a surface polishing device for a differential housing. Background Art

[0002] An automotive differential is a mechanism that enables the left and right drive wheels to rotate at different speeds. The differential housing is an important part of the differential, which is a metal housing that encloses the planetary gears. During the manufacturing process of the differential housing, some surface defects may occur, such as scratches, sand holes, air holes, etc. Polishing can effectively eliminate these defects, make the surface of the housing more flat and smooth, improve the appearance quality of the housing. At the same time, the smooth surface of the housing after polishing can reduce the friction between the lubricating oil and the internal components, reduce energy loss, and improve the transmission efficiency of the differential.

[0003] When the existing polishing of the differential housing uses polishing sand, the staff manually puts the differential housing into a container or a polishing frame filled with polishing sand, and makes the polishing sand rub against the surface of the housing through mechanical vibration or other means to achieve the polishing effect. After the polishing is completed, the staff needs to manually take out the differential housing from the polishing sand and perform cleaning and inspection. The degree of automation is low, resulting in low production efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose a surface polishing device for a differential housing to solve the problem that when the existing technology uses polishing sand to polish the differential housing, the staff manually puts the differential housing into a container or a polishing frame filled with polishing sand, and makes the polishing sand rub against the surface of the housing through mechanical vibration or other means to achieve the polishing effect. After the polishing is completed, the staff needs to manually take out the differential housing from the polishing sand and perform cleaning and inspection. The degree of automation is low, resulting in low production efficiency. On both sides of the top of the frame-shaped slider, side columns are fixedly installed. Gears are rotatably installed inside the side columns. A mating groove is opened at the top of the frame-shaped slider. The flipping mechanism includes a rack. The rack is movably inserted into the mating groove, and the rack meshes with the gear. A first connecting frame is fixedly installed at the bottom of the rack. A contraction groove is opened at the bottom of the side column. A tension spring is arranged inside the contraction groove. One end of the tension spring is connected to a first cylindrical rod. The first cylindrical rod is movably installed in the contraction groove under the action of the tension spring. The other end of the first cylindrical rod is fixedly installed with a second rectangular rod. A second connecting frame is fixedly installed at the top of the second rectangular rod. A connecting rod is connected between the first connecting frame and the second connecting frame through a rotating shaft. The other end of the second rectangular rod is fixedly installed with a third cylindrical rod. The surface of the third cylindrical rod movably penetrates through the frame-shaped slider and the outer frame. The other end of the third cylindrical rod is fixedly installed with a disc.

[0005] To achieve the above object, the present invention provides a surface polishing device for a differential housing, including an outer frame. An inner groove is formed on the middle-end surface of the outer frame. A frame-shaped slider is slidably installed inside the inner groove. A cylinder is installed on the back of the outer frame, and the output end of the cylinder is connected to the frame-shaped slider. A polishing mechanism and a feeding mechanism are installed inside the frame-shaped slider, and the feeding mechanism is located above the polishing mechanism. An adjusting mechanism is arranged on the side of the polishing mechanism, and the adjusting mechanism is used to adjust the height of the polishing mechanism. A flipping mechanism is arranged on the side of the feeding mechanism, and the flipping mechanism is used to adjust the angle of the feeding mechanism.

[0006] In the above technical solution, preferably, a storage cavity is formed on the bottom surface of the frame-shaped slider. The polishing mechanism includes a base, and the base is movably installed inside the storage cavity. A polishing frame is arranged above the base. Side ears are installed at the four end corners of the polishing frame. A light rod is fixedly installed on the surface of the side ear, and a composite spring is installed at the bottom of the light rod. The bottom end of the composite spring is connected to the base.

[0007] In the above technical solution, preferably, the adjusting mechanism includes a path groove. The path groove is formed on both sides of the inner groove. The path groove includes a linear sliding groove and an inclined sliding groove. The linear sliding groove is arranged at the front end of the inclined sliding groove. Moving columns are fixedly arranged on both sides of the base. An activity groove is formed on the side surface of the storage cavity. The surface of the moving column penetrates through the activity groove, and the end of the moving column is slidably clamped in the path groove. A limiting groove is formed on the rear surface of the storage cavity, and a guiding column is arranged inside the limiting groove. A limiting block is fixedly installed at the bottom rear of the base, and the middle of the limiting block is movably sleeved on the surface of the guiding column.

[0008] In the above technical solution, preferably, the feeding mechanism includes a stabilizing plate. The stabilizing plate is arranged directly above the polishing frame. A plurality of clamping mechanisms are arranged in a row at the bottom of the stabilizing plate. A synchronization mechanism is arranged at the top of the stabilizing plate, and the synchronization mechanism cooperates with the tops of the plurality of clamping mechanisms.

[0009] In the above technical solution, preferably, the clamping mechanism is similar to the chuck structure inside a numerical control machine tool, and the clamping mechanism is used to clamp the end of the differential housing.

[0010] In the above technical solution, preferably, rotating plates are installed at both ends of the stabilizing plate through bolts, and gears are fixedly connected to the surfaces of the rotating plates through pin shafts.

[0011] In the above technical solution, preferably, a jitter motor is installed at the bottom of the polishing frame, and the jitter motor can drive the polishing sand inside the polishing frame to vibrate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] Through the cooperation of the polishing mechanism and the feeding mechanism, multiple differential housing can be arranged and placed inside the polishing frame. And through the self-rotation of the housing, the polishing sand can be fully and evenly contacted with all parts of the housing surface, avoiding polishing dead angles, greatly improving the polishing efficiency of the differential housing. At the same time, uniform polishing can effectively improve the flatness and smoothness of the housing surface, significantly improving the polishing quality and ensuring that the differential housing finally achieves a high-quality polishing effect;

[0014] The flipping mechanism pushes the frame-shaped slider to move through a cylinder. By using the cooperation of components such as tension springs, connecting rods, racks and gears, the feeding mechanism and the differential housing can be flipped during the process of the frame-shaped slider moving outward to the outside of the outer frame, which is convenient for the staff to observe, disassemble and assemble the differential housing, improving work efficiency. And during the flipping process, the polishing sand remaining inside the housing can fall into the polishing frame, avoiding the waste of polishing sand and the pollution of the working environment;

[0015] The adjusting mechanism adopts the cooperation mode of the movable column and the path groove, and the limit block and the guiding column. It has a simple structure, is easy to manufacture and maintain. While ensuring the function of adjusting the height of the polishing mechanism, it reduces the equipment cost and the failure rate, improves the overall reliability of the equipment. And when the flipping mechanism flips the feeding mechanism, the adjusting mechanism can lower the height of the polishing mechanism during this period to prevent the differential housing from colliding with it. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic diagram of the internal structure of the frame-shaped slider of the present invention;

[0018] Figure 3 is a schematic diagram of the structure of the frame-shaped slider from another perspective of the present invention;

[0019] Figure 4 is a schematic diagram of the structure of the feeding mechanism of the present invention;

[0020] Figure 5 is a schematic diagram of the structure of the polishing mechanism of the present invention;

[0021] Figure 6 is a partial cross-sectional view of the side view of the frame-shaped slider of the present invention;

[0022] Figure 7 is of the present invention Figure 6 an enlarged view of part A in;

[0023] Figure 8Schematic diagram of the inner wall structure of the inner groove of the present invention.

[0024] In the figure: 1. Outer frame; 2. Inner groove; 3. Frame-shaped slider; 4. Polishing mechanism; 5. Feeding mechanism; 6. Cylinder; 7. Linear chute; 8. Inclined chute; 9. Storage cavity; 10. Base; 11. Limit block; 12. Limit groove; 13. Guide post; 14. Movable post; 15. Movable groove; 16. Side ear; 17. Smooth rod; 18. Composite spring; 19. Polishing frame; 20. Jitter motor; 21. Side post; 22. Stabilizing plate; 23. Synchronizing mechanism; 24. Clamping mechanism; 25. Rotating plate; 26. Gear; 27. Matching groove; 28. Rack; 29. First connecting frame; 30. Connecting rod; 31. Second connecting frame; 32. Shrinkage groove; 33. Tension spring; 34. First cylindrical rod; 35. Second rectangular rod; 36. Third cylindrical rod. Detailed implementation manners

[0025] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0026] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0027] As Figures 1-8 shown, a surface polishing device for a differential housing includes an outer frame 1. An inner groove 2 is formed on the middle-end surface of the outer frame 1. A frame-shaped slider 3 is slidably installed inside the inner groove 2. A cylinder 6 is installed on the back of the outer frame 1. The output end of the cylinder 6 is connected to the frame-shaped slider 3. A polishing mechanism 4 and a feeding mechanism 5 are installed inside the frame-shaped slider 3, and the feeding mechanism 5 is above the polishing mechanism 4. An adjusting mechanism is arranged on the side of the polishing mechanism 4, and the adjusting mechanism is used to adjust the height of the polishing mechanism 4. The structure is simple, easy to manufacture and maintain, reduces the equipment cost and the failure rate, improves the overall reliability, and can lower the height of the polishing mechanism 4 before flipping to prevent the differential housing from colliding with it. A flipping mechanism is arranged on the side of the feeding mechanism 5, and the flipping mechanism is used to adjust the angle of the feeding mechanism 5. The feeding mechanism 5 and the differential housing can be flipped during the process of the frame-shaped slider 3 moving outward from the outer frame 1, which is convenient for observation, disassembly and assembly, and can also make the polishing sand remaining in the housing fall back into the polishing frame 19 to avoid waste and pollution.

[0028] The bottom surface of the frame-shaped slider 3 is provided with a storage cavity 9. The polishing mechanism 4 includes a base 10 which is movably installed inside the storage cavity 9. Above the base 10, there is a polishing frame 19. At the four end corners of the polishing frame 19, side ears 16 are installed. On the surface of the side ears 16, optical rods 17 are fixedly installed. At the bottom of the optical rods 17, composite springs 18 are installed. The bottom end of the composite spring 18 is connected to the base 10. The staff can pour a certain amount of polishing sand into the polishing frame 19 and place the differential housing inside the polishing frame 19. The polishing sand can polish the differential housing. At the same time, the setting of the composite spring 18 enables the polishing frame 19 to have a buffering effect during operation. The composite spring 18 can absorb and buffer these impact forces, preventing excessive impact forces from being directly transmitted to the base 10 and the frame-shaped slider 3, thus protecting the structure of the entire device and extending the service life of the equipment.

[0029] The adjusting mechanism includes path grooves. Path grooves are opened on both sides of the inner groove 2. The path grooves include a linear sliding groove 7 and an inclined sliding groove 8. The linear sliding groove 7 is arranged at the front end of the inclined sliding groove 8. On both sides of the base 10, movable columns 14 are fixedly arranged. An activity groove 15 is opened on the side surface of the storage cavity 9. The surface of the movable column 14 penetrates through the activity groove 15, and the end of the movable column 14 is slidably clamped in the path groove. A limiting groove 12 is opened on the rear surface of the storage cavity 9. Inside the limiting groove 12, a guiding column 13 is arranged. At the bottom of the rear of the base 10, a limiting block 11 is fixedly installed. The middle part of the limiting block 11 is movably sleeved on the surface of the guiding column 13. By setting the adjusting mechanism, the movable column 14 slides in the path groove, so that when the frame-shaped slider 3 slides in the inner groove 2, the movable column 14 slides to different positions in the path groove, and the height of the base 10 also changes, thereby realizing the adjustment of the height of the polishing mechanism 4. The adjusting mechanism adopts the cooperation mode of the movable column 14 and the path groove, and the limiting block 11 and the guiding column 13. The structure is relatively simple, easy to manufacture and maintain. This simple and effective structural design reduces the cost and failure rate of the equipment while ensuring the adjustment function, and improves the overall reliability of the equipment.

[0030] The loading mechanism 5 includes a stabilizing plate 22 which is arranged directly above the polishing frame 19. It can ensure the accuracy of the loading position of the differential housing, making the housing within the best polishing range of the polishing frame 19, improving the accuracy and consistency of polishing. A plurality of clamping mechanisms 24 are arranged at the bottom of the stabilizing plate 22, and a synchronization mechanism 23 is arranged at the top of the stabilizing plate 22. The synchronization mechanism 23 cooperates with the tops of the plurality of clamping mechanisms 24. The synchronization mechanism 23 and the tops of the plurality of clamping mechanisms 24 are cleverly matched, and the synchronous actions of the plurality of clamping mechanisms 24 can be accurately realized. During the polishing process of the differential housing, this synchronous action can drive the differential housing to rotate self - sufficiently. Through the self - rotation of the housing, the polishing sand can fully and evenly contact with all parts of the housing surface, avoiding polishing dead corners, greatly improving the polishing efficiency of the differential housing. At the same time, uniform polishing can effectively improve the flatness and smoothness of the housing surface, significantly improving the polishing quality and ensuring that the differential housing finally achieves a high - quality polishing effect.

[0031] The clamping mechanism 24 is similar to the chuck structure inside a CNC machine tool. The clamping mechanism 24 is used to clamp the end of the differential housing. This mature structural design has high accuracy retention. It can accurately position and clamp the end of the differential housing, ensuring that the differential housing is in the correct position when being clamped, providing a stable reference for subsequent polishing, being beneficial to improving the polishing accuracy, and reducing the uneven polishing phenomenon caused by the position deviation of the housing.

[0032] On both sides of the top of the frame - shaped slider 3, side columns 21 are fixedly installed. Inside the side columns 21, gears 26 are rotatably installed. Both ends of the stabilizing plate 22 are installed with rotating plates 25 through bolts. The surface of the rotating plate 25 is fixedly connected to the gear 26 through a pin shaft. Through the pin - shaft connection between the gear 26 and the rotating plate 25, when the angle of the loading mechanism 5 needs to be adjusted, the gear 26 can be driven to rotate. Since the rotating plate 25 is connected to the stabilizing plate 22, the rotation of the gear 26 can drive the rotating plate 25 to rotate around the pin shaft, thereby realizing the angle flipping of the stabilizing plate 22 and the entire loading mechanism 5.

[0033] A mating groove 27 is formed at the top of the frame-shaped slider 3. The flipping mechanism includes a rack 28 which is movably inserted into the interior of the mating groove 27 and meshes with the gear 26. A first connecting frame 29 is fixedly installed at the bottom of the rack 28. A contraction groove 32 is formed at the bottom of the side column 21. A tension spring 33 is arranged inside the contraction groove 32. One end of the tension spring 33 is connected to a first cylindrical rod 34. The first cylindrical rod 34 is movably installed in the contraction groove 32 under the action of the tension spring 33. The other end of the first cylindrical rod 34 is fixedly installed with a second rectangular rod 35. A second connecting frame 31 is fixedly installed at the top of the second rectangular rod 35. A connecting rod 30 is connected between the first connecting frame 29 and the second connecting frame 31 through a rotating shaft. The other end of the second rectangular rod 35 is fixedly installed with a third cylindrical rod 36. The surface of the third cylindrical rod 36 movably penetrates through the frame-shaped slider 3 and the outer frame 1. A disc is fixedly installed at the other end of the third cylindrical rod 36. Under the action of the tension spring 33, the first cylindrical rod 34 will contract inside the contraction groove 32. When the air cylinder 6 pushes the frame-shaped slider 3 to move forward, the feeding mechanism 5 and the flipping mechanism will move forward synchronously. When the frame-shaped slider 3 moves to a certain position, the disc will be close to the surface behind the outer frame 1. When the frame-shaped slider 3 continues to move forward, since the position of the disc is fixed, the first cylindrical rod 34, the second rectangular rod 35 and the third cylindrical rod 36 will not continue to move forward, and the tension spring 33 will gradually be in a stretched state. At the same time, the second connecting frame 31 will fix the position of the bottom of the connecting rod 30, so that the connecting rod 30 will drive the rack 28 to move downward through the first connecting frame 29. Then, by using the meshing transmission between the rack 28 and the gear 26, when the rack 28 moves downward in the mating groove 27, it can drive the meshing gear 26 to rotate. Since the gear 26 is connected to the rotating plate 25, the angle flipping of the stabilizing plate 22 and the differential housing clamped thereon is realized.

[0034] A jitter motor 20 is installed at the bottom of the polishing frame 19. The jitter motor 20 can drive the polishing sand inside the polishing frame 19 to vibrate. The jitter motor 20 drives the polishing sand to vibrate, making the contact between the polishing sand and the surface of the differential housing more frequent and diverse. The vibration prompts the polishing sand to continuously change the contact angle and position with the surface of the housing, and can more effectively grind the minute protrusions on the surface of the housing and fill the scratches, thereby improving the flatness and smoothness of the surface and enabling the differential housing to obtain better polishing quality.

[0035] Working principle: First, the staff pours an appropriate amount of polishing sand into the polishing frame 19, and then places the differential housing in the polishing frame 19. At the same time, multiple clamping mechanisms 24 at the bottom of the stabilizing plate 22 in the feeding mechanism 5 are used to precisely clamp the ends of the differential housing. Since the clamping mechanism 24 is similar to the chuck structure inside a numerical control machine tool and has high precision retention, it can ensure that the differential housing is in an accurate position. Then, the shaking motor 20 at the bottom of the polishing frame 19 is started to drive the polishing sand inside the polishing frame 19 to vibrate. Subsequently, under the cooperation of the synchronization mechanism 23 at the top of the stabilizing plate 22 and the tops of multiple clamping mechanisms 24, the differential housing is driven to rotate, enabling the polishing sand to fully and evenly contact all parts of the housing surface, avoiding polishing dead corners. After polishing, the cylinder 6 on the back of the outer frame 1 is started, and the output end of the cylinder 6 pushes the frame-shaped slider 3 to slide in the inner groove 2, thereby driving the polishing mechanism 4 and the feeding mechanism 5 inside the frame-shaped slider 3 to move together. During the sliding of the frame-shaped slider 3, under the action of the tension spring 33, the first cylindrical rod 34 will contract inside the contraction groove 32, and the connecting rod 30 can push the rack 28 to the deepest part of the mating groove 27, and the angle of the flipping mechanism will not change. The movable columns 14 on both sides of the base 10 slide in the path groove, and the movable columns 14 will slide from the inclined chute 8 into the linear chute 7, so that the base 10 will move downward, and the entire polishing mechanism 4 will move downward synchronously, and the differential housing will be separated from the inside of the polishing frame 19. Then, the frame-shaped slider 3 continues to move forward, and the disc will be close to the surface behind the outer frame 1. Since the position of the disc is fixed, the first cylindrical rod 34, the second rectangular rod 35, and the third cylindrical rod 36 will no longer move forward, and the tension spring 33 will be gradually stretched. At this time, the second connecting frame 31 fixes the position of the bottom of the connecting rod 30, and the connecting rod 30 drives the rack 28 to move downward through the first connecting frame 29. The rack 28 meshes with the gear 26. When the rack 28 moves downward in the mating groove 27, it drives the gear 26 to rotate. Since the gear 26 is connected to the rotating plate 25, the rotating plate 25 drives the stabilizing plate 22 to rotate, realizing the angle flipping of the feeding mechanism 5 and the differential housing clamped thereon. Finally, the differential housing will form a vertical state with the polishing frame 19. During the angle flipping process of the differential housing, the residual polishing sand inside it will fall into the polishing frame 19 under the action of its own gravity. After the differential housing finishes flipping, it is convenient for the staff to observe, disassemble, and assemble the differential housing.

[0036] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A differential housing surface polishing device, comprising an outer frame (1), characterized in that, The middle end surface of the outer frame (1) is provided with an inner groove (2). A frame-shaped slider (3) is slidably installed inside the inner groove (2). A cylinder (6) is installed on the back of the outer frame (1). The output end of the cylinder (6) is connected to the frame-shaped slider (3). A polishing mechanism (4) and a feeding mechanism (5) are installed inside the frame-shaped slider (3), and the feeding mechanism (5) is located above the polishing mechanism (4). An adjusting mechanism is arranged on the side of the polishing mechanism (4), and the adjusting mechanism is used to adjust the height of the polishing mechanism (4). A flipping mechanism is arranged on the side of the feeding mechanism (5), and the flipping mechanism is used to adjust the angle of the feeding mechanism (5). On both sides of the top of the frame-shaped slider (3), side columns (21) are fixedly installed. A gear (26) is rotatably installed inside the side column (21). A matching groove (27) is opened at the top of the frame-shaped slider (3). The flipping mechanism includes a rack (28). The rack (28) is movably inserted into the matching groove (27), and the rack (28) meshes with the gear (26). The bottom of the rack (28) is fixedly installed with a first connecting frame (29). A contraction groove (32) is opened at the bottom of the side column (21). A tension spring (33) is arranged inside the contraction groove (32). The end of the tension spring (33) is connected to a first cylindrical rod (34). The first cylindrical rod (34) is movably installed inside the contraction groove (32) under the action of the tension spring (33). The other end of the first cylindrical rod (34) is fixedly installed with a second rectangular rod (35). The top of the second rectangular rod (35) is fixedly installed with a second connecting frame (31). A connecting rod (30) is connected between the first connecting frame (29) and the second connecting frame (31) through a rotating shaft. The other end of the second rectangular rod (35) is fixedly installed with a third cylindrical rod (36). The surface of the third cylindrical rod (36) movably penetrates through the frame-shaped slider (3) and the outer frame (1). The other end of the third cylindrical rod (36) is fixedly installed with a disc.

2. The surface polishing device for a differential housing according to claim 1, wherein, A storage cavity (9) is opened at the bottom surface of the frame-shaped slider (3). The polishing mechanism (4) includes a base (10). The base (10) is movably installed inside the storage cavity (9). A polishing frame (19) is arranged above the base (10). Side ears (16) are installed at the four end corners of the polishing frame (19). A smooth rod (17) is fixedly installed on the surface of the side ear (16). A composite spring (18) is installed at the bottom of the smooth rod (17). The bottom end of the composite spring (18) is connected to the base (10).

3. The surface polishing device for a differential housing according to claim 2, wherein, The adjusting mechanism includes path grooves. The path grooves are provided on both sides of the inner groove (2). The path grooves include a linear sliding groove (7) and an inclined sliding groove (8). The linear sliding groove (7) is arranged at the front end of the inclined sliding groove (8). Moving columns (14) are fixedly arranged on both sides of the base (10). An activity groove (15) is provided on the side surface of the storage cavity (9). The surface of the moving column (14) penetrates through the activity groove (15), and the end of the moving column (14) is slidably clamped in the path groove. A limiting groove (12) is provided on the rear surface of the storage cavity (9). A guiding column (13) is arranged inside the limiting groove (12). A limiting block (11) is fixedly installed at the bottom rear of the base (10). The middle part of the limiting block (11) is movably sleeved on the surface of the guiding column (13).

4. A surface polishing device for a differential housing according to claim 3, characterized in that The feeding mechanism (5) includes a stabilizing plate (22). The stabilizing plate (22) is arranged directly above the polishing frame (19). A plurality of clamping mechanisms (24) are arranged in a row at the bottom of the stabilizing plate (22). A synchronization mechanism (23) is arranged at the top of the stabilizing plate (22). The synchronization mechanism (23) cooperates with the tops of the plurality of clamping mechanisms (24).

5. The surface polishing device for a differential housing according to claim 4, wherein, The clamping mechanism (24) is used to clamp the end of the differential housing.

6. The surface polishing device for a differential housing according to claim 4, characterized in that, Both ends of the stabilizing plate (22) are installed with rotating plates (25) through bolts. The surface of the rotating plate (25) is fixedly connected to the gear (26) through a pin shaft.

7. The surface polishing device for a differential housing according to claim 2, characterized in that A shaking motor (20) is installed at the bottom of the polishing frame (19). The shaking motor (20) can drive the polishing sand inside the polishing frame (19) to vibrate.

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