Oil cylinder barrel inner wall polishing device

Abstract

The invention relates to the technical field of polishing devices, in particular to an oil cylinder barrel inner wall polishing device which comprises a rack, a polishing structure, a supporting structure, an adjusting structure, a clamping structure, a mounting structure, a mounting frame, a machining pool, a coupler and a grinding wheel. The adjusting structure can quickly and synchronously adjust the distance between supporting points at the two ends, easily adapt to cylinder barrels with different lengths, and cooperate with an independent height fine adjustment function to accurately correct the levelness and centering of a workpiece and ensure that a machining axis is coaxial with a main shaft, so that the adaptive capacity and the adjusting efficiency of workpieces with different specifications are greatly improved; the clamping structure can achieve overall lifting and rotation of the upper clamp, space above a workpiece is completely reserved during feeding, barrier-free operation is achieved, stable and reliable annular clamping can be formed during clamping, clamping force is uniform, and the feeding and discharging process is remarkably simplified. And meanwhile, the polishing wheel is replaced through the mounting structure, operation is easy, connection is reliable, and the maintenance difficulty and downtime are remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of polishing equipment technology, specifically a polishing device for the inner wall of a hydraulic cylinder. Background Technology

[0002] As a key actuator in a hydraulic system, the surface finish of the cylinder's inner wall directly affects its sealing performance, smooth operation, and service life. Therefore, the inner wall of the cylinder usually needs to be polished after finishing to reduce surface roughness and improve smoothness.

[0003] However, traditional polishing devices typically use bolts to fix the cylinder barrel clamps inside the processing tank. When polishing cylinder barrels of different lengths, multiple bolts need to be repeatedly removed and adjusted, which is cumbersome and affects processing efficiency. Furthermore, traditional devices use a lower clamp and an upper chain to lock the cylinder barrel. When loading the cylinder barrel, if the chain is resting on the lower clamp, it is difficult to pull it out, and subsequent fixing is also troublesome, affecting loading efficiency. The polishing wheel, as a consumable part, needs to be replaced according to process requirements or wear. Traditional installation methods often use threaded or keyed connections, requiring special tools for replacement, making the operation cumbersome and time-consuming, thus affecting equipment utilization. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a polishing device for the inner wall of a hydraulic cylinder.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a polishing device for the inner wall of a hydraulic cylinder, comprising a frame, a mounting frame and a processing tank disposed on the frame, a polishing structure disposed on the mounting frame, a support structure disposed on the processing tank, and an adjustment structure disposed on the support structure; The support structure includes slide rails and sliding sleeves. Two slide rails are fixedly connected inside the processing pool. Two sliding sleeves are slidably connected on each slide rail. Support seats are fixedly connected on the four sliding sleeves. The adjustment structure includes mounting rods and guide sleeves. Two mounting rods with an "I"-shaped cross-section are fixedly connected to the support base. Two guide sleeves are symmetrically slidably connected to each mounting rod. A sliding plate is fixedly connected to the two guide sleeves on the same side. A threaded seat is fixedly connected to each sliding plate. A lifting stud is threadedly connected to the threaded seat. The lifting stud is provided with a clamping structure for clamping the cylinder. A fixed seat is fixedly connected to the support base. A second screw is rotatably connected to the fixed seat. The threads at both ends of the second screw are in opposite directions. A threaded sleeve is fixedly connected to the sliding plate. The second screw is threadedly connected to the threaded sleeve. A handwheel is fixedly connected to the end of the second screw.

[0006] Specifically, a fixing plate with an L-shaped cross-section is fixedly connected to the support base. Two fixing rods with a T-shaped cross-section are slidably connected to the fixing plate. A first spring is fixedly connected between the fixing rods and the fixing plate. The ends of the two fixing rods are fixedly connected to a fixing block. A limiting rod is fixedly connected to the fixing block. The limiting rod is slidably connected to the fixing plate. A plurality of limiting holes are linearly arranged on the side wall of the processing tank. The limiting rod is engaged with the limiting holes. Two first handles with a U-shaped cross-section are fixedly connected to the fixing plate.

[0007] Specifically, a second handle is fixedly connected to the fixing block. An installation block is fixedly connected to the second handle. A clamping rod is slidably connected to the installation block. Two clamping holes are provided on the fixing plate. The clamping rod is engaged with the clamping holes.

[0008] Specifically, the cross-section of the clamping rod is in the shape of a "dry" character structure. A second spring is fixedly connected between the clamping rod and the installation block.

[0009] Specifically, the polishing structure includes a spindle box and a driving spindle. The spindle box is slidably connected to the mounting frame. The driving spindle is rotatably connected to the spindle box. An installation shaft is fixedly connected to the driving spindle. A coupling is fixedly connected to the end of the installation shaft. A grinding wheel is installed on the coupling through an installation structure.

[0010] Specifically, a first driving member is fixedly connected to the spindle box. A second pulley is fixedly connected to the output end of the first driving member. A first pulley is fixedly connected to the driving spindle. The first pulley and the second pulley are driven by a belt. A first screw rod is rotatably connected to the mounting frame. The first screw rod is threadedly connected to the spindle box. A guide rod is fixedly connected to the mounting frame. The spindle box is slidably connected to the guide rod. A second driving member is fixedly connected to the mounting frame. The output end of the second driving member is fixedly connected to the first screw rod.

[0011] Specifically, a support shaft is installed on the mounting frame. A guide wheel with a "work" - shaped cross-section is installed on the support shaft. The installation shaft is rotatably connected to the guide wheel.

[0012] Specifically, the clamping structure includes a lower clamp and a rotating rod. The top of the lifting stud is provided with a lower clamp with a "V" shaped cross-section. The lower clamp is rotatably connected to the lifting stud. A rotating rod is rotatably connected to the lower clamp. An upper clamp with an inverted "V" shaped cross-section is fixedly connected to the rotating rod. The lower clamp is provided with a limiting groove. The upper clamp is slidably connected to the limiting groove. A third driving member is fixedly connected to the support base. A connecting rod is fixedly connected to the telescopic end of the third driving member. A sliding rod is slidably connected inside the connecting rod. A fourth driving member is fixedly connected to both the connecting rod and the sliding rod. The output end of the fourth driving member is fixedly connected to the rotating rod. The two rotating rods are rotatably connected to the connecting rod and the sliding rod, respectively.

[0013] Specifically, a guide post is fixedly connected to each of the connecting rod and the sliding rod, and a guide block is fixedly connected to each of the two sliding plates. The guide post and the guide block are slidably connected.

[0014] Specifically, the mounting structure includes a mounting base and a slot. The mounting base is fixedly connected to the coupling, and the mounting base has a slot. A U-shaped insert is fixedly connected to the grinding wheel, and the insert is inserted into the slot. Two sliders are slidably connected inside the mounting base. Two locking blocks are fixedly connected to each slider. The insert has four locking slots. A third screw is rotatably connected to the mounting base. The two ends of the third screw have opposite thread directions, and the third screw is threadedly connected to the two sliders.

[0015] The beneficial effects of this invention are: (1) The oil cylinder inner wall polishing device of the present invention has an adjustment structure that can quickly and synchronously adjust the distance between the two end support points, easily adapt to cylinders of different lengths, and with the independent height fine adjustment function, can accurately correct the workpiece level and centering, ensuring that the processing axis is coaxial with the spindle, which greatly improves the adaptability and adjustment efficiency of workpieces of different specifications.

[0016] (2) The oil cylinder inner wall polishing device of the present invention has a clamping structure that can realize the overall lifting and rotation of the upper clamp, completely freeing up the space above the workpiece during loading, realizing unobstructed operation, and forming a stable and reliable ring clamp during clamping, with uniform clamping force, which significantly simplifies the loading and unloading process.

[0017] (3) The oil cylinder barrel inner wall polishing device of the present invention adopts an intermediate support structure for polishing structure, which greatly enhances rigidity, thereby ensuring the consistency and surface quality of inner wall polishing. At the same time, the grinding wheel can be replaced by the installation structure, which is simple to operate and reliable to connect, significantly reducing maintenance difficulty and downtime. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of a hydraulic cylinder inner wall polishing device provided by the present invention; Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A. Figure 3 This is a schematic diagram of the connection structure between the connecting rod and the sliding rod of the present invention; Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of section B. Figure 5 This is a schematic diagram of the connection structure between the spindle box and the first screw of the present invention; Figure 6 for Figure 5 The diagram shows an enlarged view of section C. Figure 7 This is a schematic diagram of the connection structure between the mounting structure and the grinding wheel of the present invention; Figure 8 This is a schematic diagram of the connection structure between the drive spindle and the mounting shaft of the present invention; Figure 9 for Figure 8 The diagram shows an enlarged view of the structure of part D.

[0020] In the diagram: 1. Frame; 2. Polishing structure; 201. Spindle box; 202. Drive spindle; 203. Mounting shaft; 204. First pulley; 205. Second pulley; 206. First drive component; 207. First screw; 208. Guide rod; 209. Second drive component; 210. Support shaft; 211. Guide wheel; 3. Support structure; 301. Slide rail; 302. Sliding sleeve; 303. Support base; 304. Fixing plate; 305. Fixing rod; 306. Fixing block; 307. First spring; 308. Limiting rod; 309. Limiting hole; 310. First handle; 311. Second handle; 312. Mounting block; 313. Locking rod; 314. Second spring; 315. Locking hole; 4. Adjustment structure 401. Mounting rod; 402. Guide sleeve; 403. Slide plate; 404. Threaded seat; 405. Lifting stud; 406. Fixed seat; 407. Threaded sleeve; 408. Second screw; 409. Handwheel; 5. Clamping structure; 501. Lower clamp; 502. Rotating rod; 503. Upper clamp; 504. Limiting groove; 505. Third driving component; 506. Connecting rod; 507. Fourth driving component; 508. Slide rod; 509. Guide post; 510. Guide block; 6. Mounting structure; 601. Mounting seat; 602. Slot; 603. Insert block; 604. Slider; 605. Locking block; 606. Locking groove; 607. Third screw; 7. Mounting bracket; 8. Machining pool; 9. Coupling; 10. Grinding wheel. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, the present invention provides a polishing device for the inner wall of a hydraulic cylinder, comprising a frame 1, a mounting frame 7 and a processing tank 8 mounted on the frame 1, a polishing structure 2 mounted on the mounting frame 7, a support structure 3 mounted on the processing tank 8, and an adjustment structure 4 mounted on the support structure 3. The support structure 3 includes a slide rail 301 and a sliding sleeve 302. Two slide rails 301 are fixedly connected inside the processing pool 8. Two sliding sleeves 302 are slidably connected on each slide rail 301. Support seats 303 are fixedly connected on the four sliding sleeves 302. The adjusting structure 4 includes mounting rods 401 and guide sleeves 402. Two mounting rods 401 with an "I"-shaped cross-section are fixedly connected to the support base 303. Two guide sleeves 402 are symmetrically slidably connected to each mounting rod 401. A sliding plate 403 is fixedly connected to the two guide sleeves 402 on the same side. A threaded seat 404 is fixedly connected to each sliding plate 403. A lifting stud 405 is threaded onto the threaded seat 404. The lifting stud 405 is equipped with a clamping structure 5 for clamping the cylinder. A fixed... A fixed base 406 is rotatably connected to a second screw 408, the threads at both ends of the second screw 408 are in opposite directions. A threaded sleeve 407 is fixedly connected to a slide plate 403, and the second screw 408 is threadedly connected to the threaded sleeve 407. A handwheel 409 is fixedly connected to the end of the second screw 408. The cylinder barrel is placed stably in the V-grooves of the two lower clamps 501. First, the handwheel 409 fixed to the end of the second screw 408 is rotated. The handwheel 409 drives the second screw 408 to rotate on the fixed base 406. The 408 has threads in opposite directions at both ends and engages with threaded sleeves 407 fixed on the two slide plates 403 respectively. Its rotation can synchronously drive the slide plates 403 on both sides to move towards or away from each other along the guide sleeves 402 on the mounting rod 401. When machining a longer cylinder, rotating the handwheel 409 moves the two slide plates 403 outward to increase the support distance; when machining a shorter cylinder, rotating the handwheel 409 in the opposite direction moves the two slide plates 403 inward to decrease the support distance. Through this bidirectional synchronous adjustment mechanism, it is ensured that both ends of the cylinder can obtain stable support, effectively avoiding cylinder bending or vibration caused by improper support distance, and significantly improving the adaptability to cylinders of different lengths. Next, the four lifting studs 405 are rotated respectively to independently adjust the height of each lower clamp 501 through the threaded pair transmission. This independent height adjustment function can precisely correct the horizontal state of both ends of the cylinder, compensate for the manufacturing error or installation deviation of the cylinder itself, and ensure that the cylinder axis and the drive spindle 202 axis of the polishing structure 2 achieve good coaxiality requirements, laying the foundation for subsequent high-quality polishing.

[0023] Specifically, such as Figure 2 , Figure 3 , Figure 4 and Figure 9As shown, a fixing plate 304 with an L-shaped cross-section is fixedly connected to the support base 303. Two fixing rods 305 with a T-shaped cross-section are slidably connected to the fixing plate 304. A first spring 307 is fixedly connected between the fixing rod 305 and the fixing plate 304. The ends of the two fixing rods 305 are fixedly connected with a fixing block 306. A limiting rod 308 is fixedly connected to the fixing block 306. The limiting rod 308 is slidably connected to the fixing plate 304. A plurality of limiting holes 309 are linearly arrayed on the side wall of the processing tank 8. The limiting rod 308 is engaged with the limiting hole 309. Two first handles 310 with a U-shaped cross-section are fixedly connected to the fixing plate 304; a second handle 311 is fixedly connected to the fixing block 306. An installation block 312 is fixedly connected to the second handle 311. A clamping rod 313 is slidably connected to the installation block 312. Two clamping holes 315 are provided on the fixing plate 304. The clamping rod 313 is engaged with the clamping hole 315; the cross-section of the clamping rod 313 is in the shape of a "dry" character structure. A second spring 314 is fixedly connected between the clamping rod 313 and the installation block 312; when it is necessary to move the support base 303 over a large range, it is necessary to first disengage the limiting rod 308 from the limiting hole 309 and keep it in a disengaged state. For this purpose, the operator pulls up the clamping rod 313, the clamping rod 313 disengages from the clamping hole 315, and the second spring 314 is compressed. Then, the operator pulls the second handle 311, driving the fixing block 306 to overcome the pulling force of the first spring 307, so that the limiting rod 308 completely exits from the current limiting hole 309. Then, the clamping rod 313 is released until the clamping rod 313 on the installation block 312 clicks into another clamping hole 315 on the fixing plate 304 under the push of the second spring 314. At this time, the engagement between the clamping rod 313 and the clamping hole 315 locks the position of the fixing block 306 and the limiting rod 308, preventing the first spring 3 from pulling the limiting rod 308 back; in the state where the limiting rod 308 is locked and lifted, the operator can freely and unobstructedly drag the entire support base 303, the adjusting structure 4 and the clamping structure 5 along the direction of the slide rail 301 to the target general area through the first handle 310; after the position is roughly determined, the operator gently presses the clamping rod 313 outwards again, so that the clamping rod 313 disengages from the clamping hole 315. Subsequently, the clamping rod 313 is slowly released. The fixing block 306 moves under the restoring force of the first spring 307, and the tip of the limiting rod 308 will contact the side wall of the processing tank 8 and slide into the most aligned limiting hole 309 as the support base 303 is finely adjusted slightly, making a clear positioning sound. The cooperation between the limiting rod 308 and the limiting hole 309 realizes the precise positioning and mechanical locking of the support base 303 in the axial direction of the slide rail 301, preventing the support base 303 from accidentally sliding during the processing process.

[0024] Specifically, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 8 and Figure 9 As shown, the polishing structure 2 includes a spindle box 201 and a drive spindle 202. The spindle box 201 is slidably connected to the mounting bracket 7, and the drive spindle 202 is rotatably connected to the spindle box 201. A mounting shaft 203 is fixedly connected to the drive spindle 202, and a coupling 9 is fixedly connected to the end of the mounting shaft 203. A polishing wheel 10 is mounted on the coupling 9 via the mounting structure 6. A first drive component 206 is fixedly connected to the spindle box 201, and a second pulley 205 is fixedly connected to the output end of the first drive component 206. A polishing wheel 10 is fixedly mounted on the drive spindle 202. A first pulley 204 is fixedly connected to the mounting bracket 7, and the first pulley 204 and the second pulley 205 are driven by a belt. A first screw 207 is rotatably connected to the mounting bracket 7, and the first screw 207 is threadedly connected to the spindle box 201. A guide rod 208 is fixedly connected to the mounting bracket 7, and the spindle box 201 is slidably connected to the guide rod 208. A second drive component 209 is fixedly connected to the mounting bracket 7, and the output end of the second drive component 209 is fixedly connected to the first screw 207. A support shaft 210 is mounted on the mounting bracket 7, and a support shaft 210 is mounted on the support shaft 210. The cylinder is equipped with guide wheels 211 with an "I"-shaped cross-section, and the mounting shaft 203 is rotatably connected to the guide wheels 211. After clamping, an appropriate amount of polishing liquid or coolant is injected into the cylinder through the cooling assembly, and the first drive unit 206 (preferably a motor) is started. Its output end drives the drive spindle 202, the mounting shaft 203, and the grinding wheel 10 mounted at its front end to rotate at high speed through the transmission of the second pulley 205, the belt, and the first pulley 204. During the rotation, the mounting shaft 203 is supported by the guide wheels 211 on the support shaft 210. The first screw 207 is rotated by a support to enhance rigidity and reduce vibration. Then, the second drive unit 209 (preferably a motor) is activated. Its output end drives the first screw 207 to rotate. The first screw 207 engages with the threaded hole on the spindle box 201, pushing the spindle box 201 to move smoothly along the guide rod 208 towards the cylinder opening. This allows the high-speed rotating grinding wheel 10 to extend into the cylinder cavity at a uniform speed. Under the combined motion of rotation and axial feed, the grinding wheel 10 polishes the cylinder wall evenly. The feed speed, spindle speed and stroke can be preset and controlled according to process requirements. The clamping structure 5 includes a lower clamp 501 and a rotating rod 502. The top of the lifting stud 405 is provided with a lower clamp 501 with a "V"-shaped cross-section. The lower clamp 501 is rotatably connected to the lifting stud 405. A rotating rod 502 is rotatably connected to the lower clamp 501. An upper clamp 503 with an inverted "V"-shaped cross-section is fixedly connected to the rotating rod 502. A limiting groove 504 is provided on the lower clamp 501, and the upper clamp 503 is slidably connected to the limiting groove 504. A third driving member 505 is fixedly connected to the support base 303. The telescopic end of the third driving member 505 is fixed... A connecting rod 506 is fixedly connected, and a sliding rod 508 is slidably connected inside the connecting rod 506. A fourth driving component 507 is fixedly connected to both the connecting rod 506 and the sliding rod 508. The output end of the fourth driving component 507 is fixedly connected to a rotating rod 502. The two rotating rods 502 are rotatably connected to the connecting rod 506 and the sliding rod 508, respectively. A guide post 509 is fixedly connected to both the connecting rod 506 and the sliding rod 508. A guide block 510 is fixedly connected to each of the two sliding plates 403. The guide post 509 is slidably connected to the guide block 510.The control system controls the third drive component 505 (preferably a hydraulic rod) to move, its telescopic end extending smoothly upwards. The telescopic end is directly and fixedly connected to the connecting rod 506, driving the connecting rod 506 and its internally slidably connected slide rod 508 to move upwards synchronously. The guide post 509 fixed on the connecting rod 506 and slide rod 508 slides upwards along the guide block 510 mounted on the slide plate 403, ensuring that the entire clamping unit is smoothly lifted vertically. During this upward movement, the connecting rod 506 and slide rod 508 are connected by the fourth drive component 505. 07 drives the rotating rod 502 to move upward synchronously. The upward movement of the rotating rod 502 directly drives the upper clamp 503 to slide upward along the limiting groove 504 set on the lower clamp 501, so that the upper clamp 503 completely disengages from the constraint of the limiting groove 504 and separates from the lower clamp 501, preparing for the subsequent rotation action. When the upper clamp 503 is raised to disengage from the limiting groove 504, the control system sequentially controls the two fourth driving components 507 (preferably motors) to move, driving the two rotating rods 502 to move around the connecting rod 506 and the sliding rod 501 respectively. When the hinge point of 8 rotates, the rotating rod 502 drives the upper clamp 503, which has already disengaged from the limiting groove 504, to continue rotating outward by about 180 degrees. This rotation causes the upper clamp 503 to rotate to the other side, clearing the space directly above the cylinder and thus not obstructing the cylinder, providing an unobstructed operating window for loading. When it is necessary to clamp the cylinder, the fourth drive member 507 reverses the rotation of the rotating rod 502 by 180 degrees, causing the upper clamp 503 to return to its original position directly above the cylinder. Subsequently, the telescopic end of the third drive member 505 retracts downward, driving the connecting rod 506... The slide bar 508 and the entire clamping unit descend smoothly. During this process, the upper clamp 503, under the control of gravity and the fine adjustment of the fourth drive component 507, slides downward along the limiting groove 504 until its inverted V-shaped clamping surface is fully in contact with the outer wall of the cylinder, forming a stable and reliable annular clamping structure together with the V-shaped groove of the lower clamp 501. Throughout the clamping process, the telescopic design of the connecting rod 506 and the slide bar 508 can flexibly adapt to the changes in the distance between the two slide plates 403 (i.e., the two clamping points) altered by the adjustment structure 4.

[0025] Specifically, such as Figure 2 , Figure 7 and Figure 9As shown, the mounting structure 6 includes a mounting base 601 and a slot 602. The mounting base 601 is fixedly connected to the coupling 9, and the mounting base 601 has a slot 602. A U-shaped insert 603 is fixedly connected to the grinding wheel 10, and the insert 603 is inserted into the slot 602. Two sliders 604 are slidably connected inside the mounting base 601, and two locking blocks 605 are fixedly connected to each slider 604. The insert 603 has four locking slots 606. A third screw 607 is rotatably connected to the mounting base 601. The two ends of the third screw 607 have opposite thread directions, and the third screw 607 is threadedly connected to the two sliders 604. When it is necessary to replace the grinding wheel 10 to adapt to different process requirements, The operation is as follows: Use a tool to rotate the third screw 607 on the mounting base 601. The reverse threads at both ends of the third screw 607 drive the two sliders 604 on it to slide backward inside the mounting base 601, so that the two locking blocks 605 on each slider 604 disengage from the corresponding four slots 606 on the insertion block 603 of the grinding wheel 10. After unlocking, the old grinding wheel 10 can be directly pulled out from the slot 602 of the mounting base 601. Align the insertion block 603 of the new grinding wheel 10 with the insertion slot 602, and then rotate the third screw 607 in the reverse direction to drive the two sliders 604 to move towards each other, so that the locking blocks 605 re-engage into the slots 606, thereby achieving a quick and reliable replacement of the grinding wheel 10.

[0026] In use, when the support base 303 needs to be moved over a large area, the limiting rod 308 must first be disengaged from the limiting hole 309 and kept in a disengaged state. To do this, the operator pulls the locking rod 313 upwards, disengaging the locking rod 313 from the locking hole 315, compressing the second spring 314, and then pulls the second handle 311, causing the fixing block 306 to overcome the tension of the first spring 307, so that the limiting rod 308 is completely disengaged from the current limiting hole 309. Then, the locking rod 313 is released until the locking rod 313 on the mounting block 312, pushed by the second spring 314, clicks into another locking hole 315 on the fixing plate 304. At this time, the locking action of the locking rod 313 and the locking hole 315 locks the position of the fixing block 306 and the limiting rod 308, preventing the first spring 307 from pulling the limiting rod 308 back. In the raised position, the operator can use the first handle 310 to freely and unobstructedly drag the entire support base 303, adjustment structure 4, and clamping structure 5 along the slide rail 301 to the approximate target area. After the position is roughly determined, the operator gently pulls the lever 313 outward again to disengage the lever 313 from the locking hole 315. Then, the operator slowly releases the lever 313. Under the restoring force of the first spring 307, the fixing block 306 drives the limiting rod 308 to move. The tip of the limiting rod 308 will contact the side wall of the processing pool 8 and slide into the corresponding limiting hole 309 as the support base 303 is slightly adjusted. A clear positioning sound is emitted. The cooperation between the limiting rod 308 and the limiting hole 309 achieves precise positioning and mechanical locking of the support base 303 in the axial direction of the slide rail 301, preventing the support base 303 from accidentally sliding during processing. Then, the cylinder barrel is placed stably in the V-grooves of the two lower clamps 501. First, the handwheel 409 fixed to the end of the second screw 408 is rotated. The handwheel 409 drives the second screw 408 to rotate on the fixed seat 406. Since the two ends of the second screw 408 have threads in opposite directions and engage with the threaded sleeves 407 fixed on the two slide plates 403 respectively, its rotation can synchronously drive the slide plates 403 on both sides to move towards or away from each other along the guide sleeves 402 on the mounting rod 401. When machining a longer cylinder barrel, rotating the handwheel 409 causes the two slide plates 403 to move outward to increase the support distance; when machining a shorter cylinder barrel, rotating the handwheel 409 in the opposite direction causes the two slide plates 403 to move outward to increase the support distance. The slide plate 403 moves inward to reduce the support spacing. This bidirectional synchronous adjustment mechanism ensures that both ends of the cylinder can obtain stable support, effectively avoiding cylinder bending or vibration caused by improper support spacing, and significantly improving the adaptability to cylinders of different lengths. Then, the four lifting studs 405 are rotated respectively, and the height of each lower clamp 501 is independently adjusted through the threaded pair transmission. This independent height adjustment function can precisely correct the horizontal state of both ends of the cylinder, compensate for the manufacturing error or installation deviation of the cylinder itself, and ensure that the cylinder axis and the drive spindle 202 axis of the polishing structure 2 achieve good coaxiality requirements, laying the foundation for subsequent high-quality polishing processing. Secondly, the control system controls the third driving component 505 (preferably a hydraulic rod) to move, its telescopic end extending smoothly upwards. The telescopic end is directly and fixedly connected to the connecting rod 506, driving the connecting rod 506 and its internally slidably connected slide rod 508 to move upwards synchronously. The guide post 509 fixed on the connecting rod 506 and slide rod 508 slides upwards along the guide block 510 installed on the slide plate 403, ensuring that the entire clamping unit is lifted smoothly in the vertical direction. During this upward movement, the connecting rod 506 and slide rod 508 are driven by the fourth driving component. The component 507 drives the rotating rod 502 to move upward synchronously. The upward movement of the rotating rod 502 directly drives the upper clamp 503 to slide upward along the limiting groove 504 set on the lower clamp 501, so that the upper clamp 503 completely disengages from the constraint of the limiting groove 504 and separates from the lower clamp 501, preparing for the subsequent rotation action. After the upper clamp 503 is raised to disengage from the limiting groove 504, the control system sequentially controls the two fourth driving components 507 (preferably motors) to move, driving the two rotating rods 502 to move around the connecting rod 506 and the sliding rod 502 respectively. The hinge point of 08 rotates, and the rotating rod 502 drives the upper clamp 503, which has already disengaged from the limiting groove 504, to continue rotating outward by about 180 degrees. This rotation causes the upper clamp 503 to rotate to the other side, clearing the space directly above the cylinder and thus not obstructing the cylinder, providing an unobstructed operating window for loading. When it is necessary to clamp the cylinder, the fourth drive member 507 reverses the rotation of the rotating rod 502 by 180 degrees, causing the upper clamp 503 to return to its original position directly above the cylinder. Subsequently, the telescopic end of the third drive member 505 retracts downward, driving the connecting rod 50 6. The slide bar 508 and the entire clamping unit descend smoothly. During this process, the upper clamp 503 slides down along the limiting groove 504 under the control of gravity and the fine adjustment of the fourth drive component 507 until its inverted V-shaped clamping surface is completely in contact with the outer wall of the cylinder, and together with the V-shaped groove of the lower clamp 501, it forms a stable and reliable ring clamping structure. During the entire clamping process, the telescopic design of the connecting rod 506 and the slide bar 508 can flexibly adapt to the changes in the distance between the two slide plates 403 (i.e., the two clamping points) changed by the adjustment structure 4. After clamping, a suitable amount of polishing liquid or coolant is injected into the cylinder through the cooling assembly. The first drive unit 206 (preferably a motor) is started. Its output end drives the drive spindle 202, the mounting shaft 203 and the grinding wheel 10 mounted at its front end to rotate at high speed through the transmission of the second pulley 205, the belt and the first pulley 204. During the rotation, the mounting shaft 203 is supported by the guide wheel 211 on the support shaft 210 to enhance rigidity and reduce vibration. Then the second drive unit 209 (preferably a motor) is started. Its output end drives the first screw 207 to rotate. The first screw 207 cooperates with the threaded hole on the spindle box 201 to push the spindle box 201 to move smoothly along the guide rod 208 towards the cylinder opening end, so that the high-speed rotating grinding wheel 10 extends into the cylinder cavity at a uniform speed. Under the combined motion of rotation and axial feed, the grinding wheel 10 polishes the inner wall of the cylinder uniformly. The feed speed, spindle speed and stroke can be preset and controlled according to the process requirements. Finally, when it is necessary to replace the grinding wheel 10 to adapt to different process requirements, the operation is as follows: Use a tool to rotate the third screw 607 on the mounting base 601. The reverse threads at both ends of the third screw 607 drive the two sliders 604 on it to slide backward inside the mounting base 601, so that the two locking blocks 605 on each slider 604 disengage from the corresponding four slots 606 on the insertion block 603 of the grinding wheel 10. After unlocking, the old grinding wheel 10 can be directly pulled out from the slot 602 of the mounting base 601. Align the insertion block 603 of the new grinding wheel 10 with the insertion slot 602, and then rotate the third screw 607 in the reverse direction to drive the two sliders 604 to move towards each other, so that the locking blocks 605 re-engage into the slots 606, thereby achieving a quick and reliable replacement of the grinding wheel 10.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for polishing the inner wall of a hydraulic cylinder, characterized in that, It includes a frame (1), a mounting bracket (7) and a processing tank (8) provided on the frame (1), a polishing structure (2) provided on the mounting bracket (7), a support structure (3) provided on the processing tank (8), and an adjustment structure (4) provided on the support structure (3); The support structure (3) includes a slide rail (301) and a sliding sleeve (302). Two slide rails (301) are fixedly connected inside the processing tank (8). Two sliding sleeves (302) are slidably connected to each slide rail (301). A support seat (303) is fixedly connected to the four sliding sleeves (302); The adjustment structure (4) includes a mounting rod (401) and a guide sleeve (402). Two mounting rods (401) with an "I" - shaped cross - section are fixedly connected to the support seat (303). Two guide sleeves (402) are symmetrically slidably connected to each mounting rod (401). A slide plate (403) is fixedly connected to the two guide sleeves (402) on the same side. A threaded seat (404) is fixedly connected to each slide plate (403). A lifting screw (405) is threadedly connected to the threaded seat (404). A clamping structure (5) for clamping the cylinder barrel is provided on the lifting screw (405). A fixed seat (406) is fixedly connected to the support seat (303). A second screw rod (408) is rotatably connected to the fixed seat (406). The thread directions at both ends of the second screw rod (408) are opposite. A threaded sleeve (407) is fixedly connected to the slide plate (403). The second screw rod (408) is threadedly connected to the threaded sleeve (407). A handwheel (409) is fixedly connected to the end of the second screw rod (408).

2. The cylinder barrel inner wall polishing device according to claim 1, characterized in that: A fixing plate (304) with an L - shaped cross - section is fixedly connected to the support seat (303). Two fixing rods (305) with a T - shaped cross - section are slidably connected to the fixing plate (304). A first spring (307) is fixedly connected between the fixing rod (305) and the fixing plate (304). A fixing block (306) is fixedly connected to the ends of the two fixing rods (305). A limiting rod (308) is fixedly connected to the fixing block (306). The limiting rod (308) is slidably connected to the fixing plate (304). A plurality of limiting holes (309) are linearly arranged on the side wall of the processing tank (8). The limiting rod (308) is engaged with the limiting holes (309). Two first handles (310) with a U - shaped cross - section are fixedly connected to the fixing plate (304).

3. The cylinder barrel inner wall polishing device according to claim 2, characterized in that: A second handle (311) is fixedly connected to the fixing block (306). A mounting block (312) is fixedly connected to the second handle (311). A clamping rod (313) is slidably connected to the mounting block (312). Two clamping holes (315) are provided on the fixing plate (304). The clamping rod (313) is engaged with the clamping holes (315).

4. The cylinder barrel inner wall polishing device according to claim 3, characterized in that: The cross - section of the clamping rod (313) is a "dry" - shaped structure. A second spring (314) is fixedly connected between the clamping rod (313) and the mounting block (312).

5. The cylinder barrel inner wall polishing device according to claim 1, characterized in that: The polishing structure (2) includes a spindle box (201) and a drive spindle (202). The spindle box (201) is slidably connected to the mounting bracket (7). The drive spindle (202) is rotatably connected to the spindle box (201). The mounting shaft (203) is fixedly connected to the drive spindle (202). The end of the mounting shaft (203) is fixedly connected to a coupling (9). A polishing wheel (10) is mounted on the coupling (9) through the mounting structure (6).

6. The cylinder barrel inner wall polishing device according to claim 5, characterized in that: A first driving component (206) is fixedly connected to the spindle box (201), and a second pulley (205) is fixedly connected to the output end of the first driving component (206). A first pulley (204) is fixedly connected to the drive spindle (202), and the first pulley (204) and the second pulley (205) are driven by a belt. A first screw (207) is rotatably connected to the mounting bracket (7), and the first screw (207) is threadedly connected to the spindle box (201). A guide rod (208) is fixedly connected to the mounting bracket (7), and the spindle box (201) and the guide rod (208) are slidably connected. A second driving component (209) is fixedly connected to the mounting bracket (7), and the output end of the second driving component (209) is fixedly connected to the first screw (207).

7. The cylinder barrel inner wall polishing device according to claim 6, characterized in that: The mounting bracket (7) is equipped with a support shaft (210), and the support shaft (210) is equipped with a guide wheel (211) with an "I" shaped cross section. The mounting shaft (203) is rotatably connected to the guide wheel (211).

8. The cylinder barrel inner wall polishing device according to claim 1, characterized in that: The clamping structure (5) includes a lower clamp (501) and a rotating rod (502). The top of the lifting stud (405) is provided with a lower clamp (501) with a "V" shaped cross section. The lower clamp (501) is rotatably connected to the lifting stud (405). A rotating rod (502) is rotatably connected to the lower clamp (501). An upper clamp (503) with an inverted "V" shaped cross section is fixedly connected to the rotating rod (502). A limiting groove (504) is provided on the lower clamp (501). The upper clamp (503) and the limiting groove (504) are slidably connected. Next, a third driving member (505) is fixedly connected to the support base (303). A connecting rod (506) is fixedly connected to the telescopic end of the third driving member (505). A sliding rod (508) is slidably connected inside the connecting rod (506). A fourth driving member (507) is fixedly connected to each of the connecting rod (506) and the sliding rod (508). The output end of the fourth driving member (507) is fixedly connected to the rotating rod (502). The two rotating rods (502) are rotatably connected to the connecting rod (506) and the sliding rod (508) respectively.

9. A polishing device for the inner wall of a hydraulic cylinder according to claim 8, characterized in that: A guide post (509) is fixedly connected to each of the connecting rod (506) and the slide rod (508), and a guide block (510) is fixedly connected to each of the two slide plates (403). The guide post (509) and the guide block (510) are slidably connected.

10. A polishing device for the inner wall of a hydraulic cylinder according to claim 5, characterized in that: The mounting structure (6) includes a mounting base (601) and a slot (602). The mounting base (601) is fixedly connected to the coupling (9). The mounting base (601) is provided with a slot (602). The grinding wheel (10) is fixedly connected with a U-shaped insert (603). The insert (603) is inserted into the slot (602). The mounting base (601) has two sliding blocks (604) inside. Each of the sliding blocks (604) has two fixed blocks (605). The insert (603) is provided with four slots (606). The mounting base (601) is rotatably connected with a third screw (607). The two ends of the third screw (607) have opposite thread directions. The third screw (607) is threadedly connected to the two sliding blocks (604).

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