A grinding device for repairing the inner wall of a heavy-duty vehicle's gas spring cylinder.

Abstract

This invention relates to the field of polishing technology, and more particularly to a polishing device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder. The device includes a body, a fixed plate mounted on the upper surface of the body, a movable plate connected to the upper surface of the fixed plate via a horizontal and vertical moving mechanism, an arc-shaped opening through the front surface of the movable plate, a segmented plate rotatably connected to the inner side of the arc-shaped opening via an adjusting mechanism, a rotating cylinder slidably passing through the front surface of the movable plate, and a driving plate rotatably sleeved on the rear end of the outer surface of the rotating cylinder via a reciprocating drive mechanism. A telescopic mechanism is provided between the driving plate and the movable plate. This invention ensures that the polishing wheel performs uniform polishing around the central axis of the spring cylinder, has a rapid positioning function, improves polishing accuracy, and can flexibly avoid and perform positioning polishing when there are protrusions on the surface of the spring cylinder.

Description

Technical Field

[0001] This invention relates to the field of polishing technology, and in particular to a polishing device for repairing the inner wall of a heavy-duty vehicle's oil-gas spring cylinder. Background Technology

[0002] The inner wall of the spring cylinder may develop scratches, dents, or rust due to wear, corrosion, or impacts. These defects need to be removed by grinding to restore a smooth surface. Grinding and repairing the inner wall of the oil-air spring cylinder in heavy-duty vehicles is a crucial process to ensure its performance and service life. The upper end of the spring cylinder has mounting lugs for connecting it to other vehicle structures (such as the frame and suspension) for easy assembly.

[0003] In the repair process, a grinding wheel is used to polish the inner wall of the cylinder lug to eliminate the grinding marks left by rough grinding and reduce the surface roughness of the inner wall. However, manual polishing is usually performed, making it difficult to ensure uniform contact between the polishing wheel and the inner wall. Furthermore, due to the large weight of the spring cylinder, it is difficult to polish the inner wall using a common internal grinding machine, and manual polishing is quite laborious. Therefore, a device for polishing the inner wall of a heavy-duty vehicle oil-gas spring cylinder is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a grinding device for repairing the inner wall of a heavy-duty vehicle's oil-gas spring cylinder.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder, comprising a body, a fixed plate installed on the upper surface of the body, a movable plate connected to the upper surface of the fixed plate via a horizontal and vertical moving mechanism, an arc-shaped opening through the front surface of the movable plate, a segmented plate rotatably connected to the inner side of the arc-shaped opening via an adjusting mechanism, a rotating cylinder slidably passing through the front surface of the movable plate, a driving plate rotatably sleeved on the rear end of the outer surface of the rotating cylinder via a reciprocating drive mechanism, a telescopic mechanism provided between the driving plate and the movable plate, two insert plates slidably passing through the front end of the outer surface of the rotating cylinder via an elastic mechanism, a grinding wheel rotatably installed at the front surface of the two insert plates at their far ends via a power mechanism, and a frustum-shaped surface opened on the front side of the grinding wheel;

[0006] The segmented plate is a part of the frustum surface, and its corresponding central axis is coaxial with the central axis of the rotating cylinder.

[0007] Preferably, the horizontal and vertical moving mechanism includes a fixed rail fixedly installed at the front of the upper surface of the fixed plate, two sliding rails slidably connected to the inner side of the fixed rail, a slider slidably connected between the two sliding rails along the vertical direction, the rotating cylinder slidingly passing through the inner side of the slider, and a pressing mechanism provided on the rear surface of the sliding rail and the slider.

[0008] Preferably, the clamping mechanism includes a first short-pitch cylinder fixedly mounted on the upper surface of the fixed plate. The front end of the first short-pitch cylinder contacts a pressure plate. Side inserts are fixedly connected to both sides of the front surface of the pressure plate. The two side inserts are slidably inserted into the side surface of the sliding rail. A bottom plate is fixedly connected to the rear surface of the pressure plate. An indicator plate is fixedly connected to the rear end of the bottom plate. The lower surface of the bottom plate is in slidable contact with the fixed plate. The indicator plate is located behind the rotating cylinder.

[0009] Preferably, the adjustment mechanism includes a transmission tooth edge fixedly connected to the rear end of the segmented plate; an adjustment gear is rotatably mounted on the rear surface of the movable plate near the upper part of the arc-shaped opening; the adjustment gear meshes with the transmission tooth edge; a T-shaped column is fixedly passed through the middle of the adjustment gear; a guide bar is fixedly connected to the outer surface of the T-shaped column; an adjustment sleeve is slidably fitted on the outer surfaces of the T-shaped column and the guide bar; an L-shaped plate is fixedly connected to the rear surface of the movable plate; a fixing tooth is fixedly connected to the lower end of the L-shaped plate; the rotation of the T-shaped column passes through the movable plate and the fixing tooth; a compression spring is provided between the adjustment sleeve and the rear end of the T-shaped column; the compression spring is fitted on the outer surface of the T-shaped column; a toothed groove is formed on the front surface of the adjustment sleeve; the toothed groove meshes with the rear surface of the fixing tooth.

[0010] Preferably, the telescopic mechanism includes a bracket fixedly installed on the rear surface of the movable plate, a telescopic cylinder fixedly installed on the upper surface of the bracket, the telescopic end of the telescopic cylinder being fixedly connected to the front surface of the driving plate, and the driving plate sliding through the inner side of the bracket.

[0011] Preferably, the reciprocating drive mechanism includes a reciprocating motor fixedly mounted on the front surface of the drive plate, a transmission gear fixedly mounted on the output shaft of the reciprocating motor, and a gear ring fixedly connected to the rear end of the outer surface of the rotating cylinder, wherein the transmission gear meshes with the gear ring.

[0012] Preferably, the elastic mechanism includes a bent plate fixedly connected to one end of the insert plate near the inner side of the rotating cylinder, an inner protrusion fixedly connected to the front inner wall of the rotating cylinder, guide posts fixedly connected to the upper and lower surfaces of the inner protrusion, the guide posts slidingly penetrating the outer surface of the bent plate, a return spring sleeved on the outer surface of the guide posts, the return spring being located between the inner protrusion and the bent plate, and a pressing mechanism provided on the rear surface of the two insert plates.

[0013] Preferably, the pressing mechanism includes a second short-pitch cylinder fixedly installed at the inner rear end of the rotating cylinder. A pressure rod is fixedly connected to the front end of the second short-pitch cylinder. The pressure rod slides in a front-rear direction with the inner wall of the rotating cylinder. The front end of the pressure rod contacts the concave block. The front ends of both sides of the concave block slide through the front inner wall of the rotating cylinder, and the two bending plates are located inside the concave block.

[0014] Preferably, the power mechanism includes a protective shell fixedly installed on the rear surface of the insert plate, a drive motor fixedly installed on the inner side of the protective shell, and drive gears fixedly connected to the output shaft of the drive motor and the rear end of the grinding wheel, with the two drive gears meshing.

[0015] Preferably, a plurality of wheels are mounted on the lower surface of the machine body, and a support foot is threaded through the lower surface of the machine body near the outer periphery of the wheels.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention ensures that the polishing wheel performs uniform polishing around the central axis of the earring, and has a rapid positioning function to improve polishing accuracy;

[0018] In this invention, the segmented plate can slide and adjust its position along the inner side of the arc-shaped opening to ensure that the segmented plate avoids the protruding parts on the surface of the spring cylinder, thereby ensuring that the segmented plate can fully contact the ear ring surface of the spring cylinder during contact positioning. Therefore, when there are protruding parts on the surface of the spring cylinder, they can be flexibly avoided and positioned and polished.

[0019] In this invention, the grinding wheel rotates around the rotating cylinder during grinding, ensuring the uniformity of the grinding process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention;

[0021] Figure 2 This is a partial structural schematic diagram of a grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention.

[0022] Figure 3 This is a cross-sectional view of a partial structure of a grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention.

[0023] Figure 4 This invention relates to a grinding device for repairing the inner wall of a heavy-duty vehicle's gas spring cylinder. Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic diagram of a concave block for a grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention.

[0025] Figure 6 This is a schematic diagram of the pressure plate of the grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention.

[0026] Figure 7 This is a schematic diagram of the moving plate of the grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention.

[0027] Figure 8 This is a schematic diagram of the adjusting gear of the grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention.

[0028] Figure 9 This is a cross-sectional view of the adjusting sleeve of the grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to the present invention.

[0029] Figure 10 This is a diagram showing the usage state of the oil-gas spring cylinder cylinder repair and grinding device of the present invention.

[0030] The components include: 1. Body; 2. Fixed plate; 3. Fixed rail; 4. Sliding rail; 5. Slider; 6. Pressure plate; 7. Side insert block; 8. Bottom plate; 9. Indicator plate; 10. First short-pitch cylinder; 11. Second short-pitch cylinder; 12. Moving plate; 13. Arc-shaped opening; 14. Segment plate; 15. Transmission tooth edge; 16. Adjusting gear; 17. L-shaped plate; 18. Fixed tooth; 19. Adjusting sleeve; 20. Tooth groove; 21. T-shaped column; 22. Guide bar; 23. 24. Compression spring; 25. Rotating cylinder; 26. Pressure rod; 27. Inner protrusion; 28. Concave block; 29. ​​Insert plate; 30. Bending plate; 31. Guide post; 32. Return spring; 33. Grinding wheel; 34. Round table; 35. Protective shell; 36. Drive gear; 37. Drive motor; 38. Bracket; 39. Telescopic cylinder; 40. Drive plate; 41. Reciprocating motor; 42. Transmission gear; 43. Gear ring; 44. Wheel; 45. Support leg. Detailed Implementation

[0031] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0032] like Figures 1-10 The device shown is a grinding device for repairing the inner wall of a heavy-duty vehicle oil-gas spring cylinder. It includes a body 1, a fixed plate 2 installed on the upper surface of the body 1, a moving plate 12 connected to the upper surface of the fixed plate 2 through a horizontal and vertical moving mechanism, an arc-shaped opening 13 through the front surface of the moving plate 12, a segmented plate 14 rotatably connected to the inner side of the arc-shaped opening 13 through an adjusting mechanism, a rotating cylinder 24 slidably passing through the front surface of the moving plate 12, a driving plate 39 rotatably sleeved on the rear end of the outer surface of the rotating cylinder 24 through a reciprocating drive mechanism, a telescopic mechanism between the driving plate 39 and the moving plate 12, two insert plates 28 slidably passing through the front end of the outer surface of the rotating cylinder 24 through an elastic mechanism, a grinding wheel 32 rotatably installed at the front end of the two insert plates 28 and at the ends of the two insert plates 28 that are far apart from each other through a power mechanism, and a frustum 33 is opened on the front side of the grinding wheel 32.

[0033] The segment plate 14 is a part of the frustum surface, and its corresponding central axis is coaxial with the central axis of the rotating cylinder 24. This coaxiality ensures that the grinding wheel 32 evenly grinds the inner wall of the earring when it rotates around the rotating cylinder 24. The segment plate 14 can be adapted to the semi-circular shape of the rear end of the spring cylinder earring.

[0034] like Figure 2 , Figure 3 , Figure 7 As shown, the horizontal and vertical moving mechanism includes a fixed rail 3 fixedly installed at the front of the upper surface of the fixed plate 2. Two sliding rails 4 are slidably connected to the inner side of the fixed rail 3. A slider 5 is slidably connected between the two sliding rails 4 along the vertical direction. The rotating cylinder 24 slides through the inner side of the slider 5. A clamping mechanism is provided on the rear surface of the sliding rails 4 and the slider 5. The slider 5 can slide up and down relative to the sliding rails 4, and the sliding rails 4 can slide in both directions relative to the fixed rail 3.

[0035] like Figure 2 , Figure 6 , Figure 7 As shown, the clamping mechanism includes a first short-pitch cylinder 10 fixedly mounted on the upper surface of the fixed plate 2. The front end of the first short-pitch cylinder 10 contacts a pressure plate 6. Side inserts 7 are fixedly connected to both sides of the front surface of the pressure plate 6. The two side inserts 7 are slidably inserted into the side surfaces of the sliding rail 4, ensuring that the pressure plate 6 moves synchronously with the sliding rail 4. A bottom plate 8 is fixedly connected to the rear surface of the pressure plate 6, and an indicator plate 9 is fixedly connected to the rear end of the bottom plate 8. The lower surface of the bottom plate 8 slides in contact with the fixed plate 2. The indicator plate 9 is located behind the rotating cylinder 24. The bottom plate 8 can be positioned slightly away from the side of the first short-pitch cylinder 10 to prevent the first short-pitch cylinder 10 from interfering with the lateral movement of the pressure plate 6 and the bottom plate 8. The indicator plate 9 serves a protective function and also indicates the furthest position that the rear end of the rotating cylinder 24 can reach, preventing it from hitting the user when the rotating cylinder 24 moves backward.

[0036] like Figure 3 , Figure 7 , Figure 8As shown, the adjustment mechanism includes a transmission toothed edge 15 fixedly connected to the rear end of the segmented plate 14. An adjustment gear 16 is rotatably mounted on the rear surface of the movable plate 12, near the upper part of the arc-shaped opening 13. The adjustment gear 16 meshes with the transmission toothed edge 15. A T-shaped post 21 is fixedly passed through the middle of the adjustment gear 16. A guide bar 22 is fixedly connected to the outer surface of the T-shaped post 21. An adjustment sleeve 19 is slidably fitted on the outer surfaces of the T-shaped post 21 and the guide bar 22. The guide bar 22 can play a limiting role, ensuring that the adjustment sleeve 19 can be positioned relative to the T-shaped post 21. The T-shaped column 21 slides back and forth, while the adjusting sleeve 19 rotates synchronously with the T-shaped column 21. An L-shaped plate 17 is fixedly connected to the rear surface of the moving plate 12, and a fixing tooth 18 is fixedly connected to the lower end of the L-shaped plate 17. The rotation of the T-shaped column 21 passes through the moving plate 12 and the fixing tooth 18. A compression spring 23 is provided between the adjusting sleeve 19 and the rear end of the T-shaped column 21, and the compression spring 23 is sleeved on the outer surface of the T-shaped column 21. A toothed groove 20 is formed on the front surface of the adjusting sleeve 19, and the toothed groove 20 meshes with the rear surface of the fixing tooth 18. The compression spring 23 provides sufficient elasticity to ensure that the toothed groove 20 meshes with the fixing tooth 18, thereby ensuring the stability of the adjusting sleeve 19.

[0037] like Figure 2 , Figure 3 As shown, the telescopic mechanism includes a bracket 37 fixedly mounted on the rear surface of the movable plate 12. A telescopic cylinder 38 is fixedly mounted on the upper surface of the bracket 37. The telescopic end of the telescopic cylinder 38 is fixedly connected to the front surface of the driving plate 39, and the driving plate 39 slides through the inner side of the bracket 37. The telescopic cylinder 38 extends and retracts, causing the driving plate 39 to move back and forth. The driving plate 39 causes the rotating cylinder 24 to move back and forth, thereby changing the position of the grinding wheel 32 on the inner wall of the spring cylinder.

[0038] like Figure 3 As shown, the reciprocating drive mechanism includes a reciprocating motor 40 fixedly mounted on the front surface of the drive plate 39. A transmission gear 41 is fixedly mounted on the output shaft of the reciprocating motor 40, and a gear ring 42 is fixedly connected to the rear end of the outer surface of the rotating cylinder 24. The transmission gear 41 meshes with the gear ring 42. The output shaft of the reciprocating motor 40 rotates in both directions, which, in conjunction with the transmission of the transmission gear 41 and the gear ring 42, allows the rotating cylinder 24 to rotate within a 180-degree range in both directions. Combined with the arrangement of two grinding wheels 32, this ensures that the grinding wheels 32 can fully grind the inner wall of the spring cylinder.

[0039] like Figure 3 , Figure 4As shown, the elastic mechanism includes a bent plate 29 fixedly connected to one end of the insert plate 28 near the inner side of the rotating cylinder 24. An inner protrusion 26 is fixedly connected to the front inner wall of the rotating cylinder 24. Guide posts 30 are fixedly connected to the upper and lower surfaces of the inner protrusion 26, respectively. The guide posts 30 slide through the outer surface of the bent plate 29. A return spring 31 is sleeved on the outer surface of the guide post 30. The return spring 31 is located between the inner protrusion 26 and the bent plate 29. A pressing mechanism is provided on the rear surface of the two insert plates 28. The elastic force of the return spring 31 can make the two bent plates 29 move as far away from each other as possible, so that the grinding wheel 32 is as far away from the rotating cylinder 24 as possible, ensuring that the grinding wheel 32 can fully adhere to the inner wall of the spring cylinder when it enters the inner wall of the spring cylinder.

[0040] The pressing mechanism includes a second short-pitch cylinder 11 fixedly installed at the inner rear end of the rotating cylinder 24. A pressure rod 25 is fixedly connected to the front end of the second short-pitch cylinder 11. The pressure rod 25 slides against the inner wall of the rotating cylinder 24 in the front-rear direction. The front end of the pressure rod 25 contacts the concave block 27. The front ends of both sides of the concave block 27 slide through the front inner wall of the rotating cylinder 24, and the two bent plates 29 are located inside the concave block 27. By moving the pressure rod 25 forward to press the concave block 27, the stability of the bent plates 29 can be ensured, achieving the locking purpose.

[0041] The power mechanism includes a protective shell 34 fixedly mounted on the rear surface of the insert plate 28. A drive motor 36 is fixedly mounted inside the protective shell 34. The output shaft of the drive motor 36 and the rear end of the grinding wheel 32 are respectively fixedly connected to drive gears 35, which mesh with each other. When the drive motor 36 operates, it causes the two drive gears 35 to transmit power, thereby causing the grinding wheel 32 to perform grinding. The protective shell 34 serves a protective function.

[0042] like Figure 1 As shown, several wheels 43 are installed on the lower surface of the machine body 1, and support feet 44 are threaded through the lower surface of the machine body 1 near the outer periphery of the wheels 43. The wheels 43 facilitate the pushing of the machine body 1. When grinding, the machine body 1 can be kept stable by rotating the support feet 44 and pressing them firmly against the ground.

[0043] During use, the user pushes the main body 1 towards the spring cylinder, causing the upper edge of the spring cylinder's lug to contact the segmented plate 14, creating a pushing action. This pushing action causes the segmented plate 14 to move and adjust its position until the lower surface of the segmented plate 14 fully contacts the lug surface of the spring cylinder, with the contact point forming a curved arc. The state is as follows. Figure 10 As shown, the positioning work can be completed, ensuring that during subsequent polishing, the rotating cylinder 24 and the inner side of the spring cylinder are on the same axis, ensuring that the polishing wheel 32 polishes evenly around the central axis of the earring, which has a quick positioning function and improves polishing accuracy.

[0044] In the machine body 1 near the spring cylinder, the frustum 33 contacts the inner edge of the earring and is pushed to ensure that as the machine body 1 moves, the grinding wheel 32 can enter the inner wall of the earring. After the outer segment plate 14 makes full contact, the first short-pitch cylinder 10 extends to press the pressure plate 6 to ensure that the pressure plate 6 can press the sliding rail 4 and the slider 5 to limit the position of the moving plate 12, thereby ensuring the stability of the segment plate 14. The second short-pitch cylinder 11 is controlled to extend, so that the pressure rod 25 presses the concave block 27 to ensure that the surface of the insert plate 28 is pressed to achieve the positioning purpose. This ensures that in the subsequent grinding, the grinding wheel 32 rotates around the rotating cylinder 24, ensuring the uniformity of the grinding. It should be noted that in subsequent polishing, after one polishing is completed, the second short-pitch cylinder 11 can be controlled to retract, so that under the action of the return spring 31, the two bent plates 29 move away from each other, thereby making the polishing wheel 32 more closely adhere to the inner wall of the earring. Then, the second short-pitch cylinder 11 is controlled to extend, and after the concave block 27 presses the insert plate 28 again, a new round of inner polishing operation can be performed.

[0045] When the spring cylinder contacts the segmented plate 14, the movable plate 12 can move in the lateral direction or the up and down direction. The slider 5 slides up and down along the sliding rail 4 to ensure that the movable plate 12 can slide in the up and down direction. At the same time, the two sliding rails 4 can slide in the lateral direction along the fixed rail 3 to ensure that the movable plate 12 can move laterally. Therefore, the movement in both directions ensures that the segmented plate 14 can be pushed and moved when it contacts the spring cylinder, thereby achieving the effect of full contact.

[0046] It should be noted that if the plate 14 cannot make full contact due to the misalignment of the machine body 1 relative to the spring cylinder during the pushing process, the machine body 1 needs to be rotated and adjusted to ensure that the plate 14 makes full contact with the machine body 1 before the pre-grinding positioning operation can be considered complete.

[0047] During use, the earring surface of the spring cylinder may have some protrusions. When using the segmented plate 14 for positioning, the adjusting sleeve 19 is pulled back to compress the spring 23, causing the tooth groove 20 to disengage from the fixed tooth 18. Then, it can be rotated. During rotation, the T-shaped column 21 and the adjusting gear 16 rotate synchronously. The adjusting gear 16 drives the transmission tooth edge 15 to rotate, so that the segmented plate 14 slides along the inner side of the arc-shaped opening 13 to adjust its position, ensuring that the segmented plate 14 avoids the protruding parts on the surface of the spring cylinder, thereby ensuring that the segmented plate 14 can fully contact the earring surface of the spring cylinder during contact positioning.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding device for repairing the inner wall of a heavy-duty vehicle's gas spring cylinder, comprising a body (1), characterized in that: A fixed plate (2) is installed on the upper surface of the body (1). A movable plate (12) is connected to the upper surface of the fixed plate (2) through a horizontal and vertical moving mechanism. An arc-shaped opening (13) is opened through the front surface of the movable plate (12). A segmented plate (14) is rotatably connected to the inner side of the arc-shaped opening (13) through an adjusting mechanism. A rotating cylinder (24) slides through the front surface of the movable plate (12). A driving plate (39) is rotatably sleeved on the rear end of the outer surface of the rotating cylinder (24) through a reciprocating driving mechanism. A telescopic mechanism is provided between the driving plate (39) and the movable plate (12). Two insert plates (28) slide through the front end of the outer surface of the rotating cylinder (24) through an elastic mechanism. A grinding wheel (32) is rotatably installed on the front surface of the two insert plates (28) at one end away from each other through a power mechanism. A frustum (33) is opened on the front side of the grinding wheel (32). The segment plate (14) is a part of the frustum surface, and the corresponding central axis is coaxial with the central axis of the rotating cylinder (24); The adjustment mechanism includes a transmission toothed edge (15) fixedly connected to the rear end of the segmented plate (14). An adjustment gear (16) is rotatably mounted on the rear surface of the moving plate (12) near the upper part of the arc-shaped opening (13). The adjustment gear (16) meshes with the transmission toothed edge (15). A T-shaped post (21) is fixedly inserted through the middle of the adjustment gear (16). A guide bar (22) is fixedly connected to the outer surface of the T-shaped post (21). An adjustment sleeve (19) is slidably fitted on the outer surfaces of the T-shaped post (21) and the guide bar (22). An L-shaped plate (17) is fixedly connected to the rear surface of the moving plate (12). A fixed tooth (18) is fixedly connected to the lower end of the L-shaped plate (17). The rotation of the T-shaped column (21) passes through the moving plate (12) and the fixed tooth (18). A compression spring (23) is provided between the adjusting sleeve (19) and the rear end of the T-shaped column (21). The compression spring (23) is sleeved on the outer surface of the T-shaped column (21). A toothed groove (20) is opened on the front surface of the adjusting sleeve (19). The toothed groove (20) meshes with the rear surface of the fixed tooth (18).

2. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 1, characterized in that: The horizontal and vertical moving mechanism includes a fixed rail (3) fixedly installed on the front side of the upper surface of the fixed plate (2). Two sliding rails (4) are slidably connected to the inner side of the fixed rail (3). A slider (5) is slidably connected between the two sliding rails (4) along the vertical direction. The rotating cylinder (24) slides through the inner side of the slider (5). A pressing mechanism is provided on the rear surface of the sliding rail (4) and the slider (5).

3. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 2, characterized in that: The clamping mechanism includes a first short-pitch cylinder (10) fixedly installed on the upper surface of the fixed plate (2). The front end of the first short-pitch cylinder (10) contacts a pressure plate (6). Side inserts (7) are fixedly connected to both sides of the front surface of the pressure plate (6). The two side inserts (7) are slidably inserted into the side surface of the sliding rail (4). A bottom plate (8) is fixedly connected to the rear surface of the pressure plate (6). An indicator plate (9) is fixedly connected to the rear end of the bottom plate (8). The lower surface of the bottom plate (8) is in sliding contact with the fixed plate (2). The indicator plate (9) is located behind the rotating cylinder (24).

4. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 1, characterized in that: The telescopic mechanism includes a bracket (37) fixedly installed on the rear surface of the movable plate (12). A telescopic cylinder (38) is fixedly installed on the upper surface of the bracket (37). The telescopic end of the telescopic cylinder (38) is fixedly connected to the front surface of the driving plate (39), and the driving plate (39) slides through the inner side of the bracket (37).

5. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 1, characterized in that: The reciprocating drive mechanism includes a reciprocating motor (40) fixedly installed on the front surface of the drive plate (39). A transmission gear (41) is fixedly installed on the output shaft of the reciprocating motor (40). A gear ring (42) is fixedly connected to the rear end of the outer surface of the rotating cylinder (24). The transmission gear (41) meshes with the gear ring (42).

6. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 1, characterized in that: The elastic mechanism includes a bent plate (29) fixedly connected to one end of the insert plate (28) near the inner side of the rotating cylinder (24). An inner protrusion (26) is fixedly connected to the front inner wall of the rotating cylinder (24). Guide posts (30) are fixedly connected to the upper and lower surfaces of the inner protrusion (26). The guide posts (30) slide through the outer surface of the bent plate (29). A return spring (31) is sleeved on the outer surface of the guide posts (30). The return spring (31) is located between the inner protrusion (26) and the bent plate (29). A pressing mechanism is provided on the rear surface of the two insert plates (28).

7. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 6, characterized in that: The pressing mechanism includes a second short-pitch cylinder (11) fixedly installed at the inner rear end of the rotating cylinder (24). A pressure rod (25) is fixedly connected to the front end of the second short-pitch cylinder (11). The pressure rod (25) slides in a front-back direction with the inner wall of the rotating cylinder (24). The front end of the pressure rod (25) contacts the concave block (27). The front ends of the two sides of the concave block (27) slide through the front inner wall of the rotating cylinder (24), and the two bending plates (29) are located inside the concave block (27).

8. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 1, characterized in that: The power mechanism includes a protective shell (34) fixedly installed on the rear surface of the insert plate (28). A drive motor (36) is fixedly installed on the inner side of the protective shell (34). The output shaft of the drive motor (36) and the rear end of the grinding wheel (32) are respectively fixedly connected to drive gears (35), and the two drive gears (35) mesh with each other.

9. The device for repairing and grinding the inner wall of a heavy-duty vehicle oil-gas spring cylinder according to claim 1, characterized in that: The lower surface of the body (1) is equipped with several wheels (43), and the lower surface of the body (1) near the outer periphery of the wheels (43) is threaded with feet (44).

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