Device for polishing inner wall of oil cylinder

Abstract

The utility model relates to the field of mechanical equipment for polishing parts, in particular to a device for polishing the inner wall of an oil cylinder, which comprises a clamping platform. The lifting assembly is arranged on the clamping platform; the clamping assembly is arranged on the lifting assembly, and the clamping assembly comprises a clamping base, a linkage ring disc, a connecting rod component, a sliding block component, a transmission component and a clamping roller; the grinding platform is arranged on one side of the clamping platform; mechanical operation is achieved, the polishing effect of the inner wall of the oil cylinder is improved, the labor cost is reduced, the labor intensity of workers is reduced, meanwhile, the clamping assembly achieves loosening and clamping of the oil cylinder by operating the transmission component, the clamping step is simplified, and therefore the machining range of the oil cylinder is enlarged.

Description

Technical Field

[0001] The utility model relates to the field of equipment for grinding parts, in particular to a device for grinding the inner wall of an oil cylinder. Background Art

[0002] Hydraulic cylinders are mainly used in places where heavy objects need to be supported for a long time. They can still support heavy objects under the condition of removing oil pressure, which is safe and reliable. They are mainly used in equipment installation, lifting and disassembly in various industries such as electric power, construction, machinery manufacturing, mining, railway bridges, and shipbuilding.

[0003] During the use of the oil cylinder, due to friction or other reasons, the internal metal surface will be worn. At this time, the inner surface of the oil cylinder will become rough, and convex and concave curved surfaces are likely to appear. In severe cases, even faults such as jamming may occur. Therefore, after the hydraulic cylinder has been used for a long time, it is necessary to inspect the inner wall of the oil cylinder. If there are problems with the inner wall of the oil cylinder, we need to grind the inner wall of the oil cylinder.

[0004] In the prior art, the inner wall of the oil cylinder body is mostly ground by manual grinding. The manual grinding method has large errors, and manual grinding will result in incomplete grinding, long maintenance completion time, and low maintenance efficiency. As a result, there are gaps in the installation of subsequent components of the oil cylinder, making it easy for subsequent oil cylinders to have accidents during operation. Summary of the Utility Model

[0005] The utility model provides a device for grinding the inner wall of an oil cylinder, which replaces the manual grinding and maintenance method, uses mechanical grinding for the oil cylinder, reduces labor costs, and reduces the labor intensity of workers. Its clamping device can clamp oil cylinders of different sizes by operating the transmission member, simplifies the clamping steps, and thus expands the processing range of the oil cylinder.

[0006] To achieve the above object, the utility model provides a device for grinding the inner wall of an oil cylinder, including:

[0007] A lifting assembly, which is arranged on the clamping platform;

[0008] A clamping assembly, which is arranged on the lifting assembly. The clamping assembly includes a clamping base, a linkage ring plate, a connecting rod member, a slider member, a transmission member, and a clamping roller. The clamping base is arranged on the lifting assembly. One end of the linkage ring plate is threadedly connected to the clamping base. The transmission member controls the rotation of the linkage ring plate on the clamping base. One end of the connecting rod member is hinged to the clamping base. The slider member is sleeved on the connecting rod member. The other end of the linkage ring plate is provided with a channel. The connecting rod member is arranged in the channel. The slider member is hinged to the channel, and the connecting rod member moves in the channel. The other end of the connecting rod member is provided with the clamping roller;

[0009] A grinding platform, which is arranged on one side of the clamping platform;

[0010] A grinding assembly, which is arranged on the grinding platform.

[0011] Furthermore, the number of the lifting components is the same as that of the clamping components. The lifting component includes a lead screw lifting member and a lifting bottom plate. The lead screw lifting member is arranged on the bottom surface of the clamping platform, and the output end of the lead screw lifting member passes through the clamping platform and is connected to the lifting bottom plate.

[0012] Furthermore, the clamping base is arranged on the lifting bottom plate. The clamping base is provided with a round hole, and the round hole is provided with internal threads. One end of the linkage ring plate is provided with external threads, so that the internal threads of the clamping base are matched with the external threads of one end of the linkage ring plate. The clamping base is provided with a first hinge platform hole, a second hinge platform hole, a third hinge platform hole and a fourth hinge platform hole. The first hinge platform hole, the second hinge platform hole and the third hinge platform hole are arranged around the round hole, and the fourth hinge platform hole is close to the first hinge platform hole.

[0013] Furthermore, the transmission member includes a clamping lead screw, a first transmission block and a second transmission block. The clamping lead screw passes through the first transmission block and the second transmission block, and the first transmission block is hinged to the fourth hinge platform.

[0014] Furthermore, the connecting rod member includes a first connecting rod, a second connecting rod and a third connecting rod. One ends of the first connecting rod, the second connecting rod and the third connecting rod are respectively hinged to the first hinge platform hole, the second hinge platform hole and the third hinge platform hole. The other ends of the first connecting rod, the second connecting rod and the third connecting rod are provided with the clamping rollers, and the clamping rollers are provided with locking pieces.

[0015] Furthermore, the slider member includes a first slider, a second slider and a third slider. Chambers are arranged at the centers of the first slider, the second slider and the third slider. The first slider, the second slider and the third slider are respectively sleeved on the first connecting rod, the second connecting rod and the third connecting rod, so that the first slider, the second slider and the third slider slide on the first connecting rod, the second connecting rod and the third connecting rod, and hinge shafts are arranged on the first slider, the second slider and the third slider.

[0016] Furthermore, a plurality of hinge holes are arranged in the channel of the linkage ring plate. The hinge shafts of the first slider, the second slider and the third slider are matched with the hinge holes of the channel. A pushing boss is arranged on the outer side of the linkage ring plate, and the pushing boss is matched with the second transmission block.

[0017] Furthermore, a transport channel is provided on the grinding platform. The grinding assembly includes a transverse trolley, a grinding motor, and a grinding member. The transverse trolley is arranged on the transport channel, the grinding motor is arranged on the transverse trolley, and the grinding member is arranged at the output end of the grinding motor.

[0018] Preferably, the device for the inner wall of the grinding oil cylinder further includes an alignment assembly. The alignment assembly includes a transmitting end and a receiving end of an optical reflection sensor. The transmitting end of the optical reflection sensor is arranged on the clamping base. The height position of the transmitting end of the optical reflection sensor from the lifting bottom plate is the same as the height position of the center of the circular hole from the lifting bottom plate. The receiving end of the optical reflection sensor is arranged on the grinding motor, and the horizontal position of the receiving end is at the same horizontal position as the horizontal position of the output end of the grinding motor.

[0019] Preferably, the device for the inner wall of the grinding oil cylinder further includes a controller and a servo motor. The servo motor cooperates with the screw lifting member. The transverse trolley, the servo motor, the alignment assembly, and the grinding motor are all connected to the controller. This improves the maintenance efficiency.

[0020] Compared with the prior art, for a device for grinding the inner wall of an oil cylinder according to an embodiment of the present invention, by providing a lifting assembly on the clamping platform, arranging the clamping assembly on the lifting assembly, simultaneously providing a grinding platform, and arranging a grinding assembly on the grinding platform, wherein the lifting assembly raises the oil cylinder on the clamping assembly to a height position corresponding to the grinding assembly on the grinding platform, facilitating the grinding member to extend into the inner wall of the oil cylinder for grinding, thereby realizing mechanized operation, improving the grinding effect of the inner wall of the oil cylinder, reducing labor costs, and reducing the labor intensity of personnel. At the same time, the clamping assembly realizes the loosening and clamping of the oil cylinder by operating the transmission member, simplifying the clamping steps, and thus expanding the processing range of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of a device for grinding the inner wall of an oil cylinder according to the present invention;

[0022] Figure 2 is a schematic diagram of the working state of a device for grinding the inner wall of an oil cylinder according to the present invention;

[0023] Figure 3 is a schematic diagram of the overall structure of the clamping assembly of a device for grinding the inner wall of an oil cylinder according to the present invention;

[0024] Figure 4 is a schematic diagram of the sub-assembly structure of the clamping assembly of a device for grinding the inner wall of an oil cylinder according to the present invention;

[0025] Figure 5Schematic diagram of the planar movement of the clamping assembly of a device for grinding the inner wall of an oil cylinder according to the present utility model.

[0026] Reference numerals:

[0027] 1000. Clamping platform;

[0028] 2000. Lifting assembly; 2100. Lead screw lifting member; 2200. Lifting bottom plate;

[0029] 3000. Clamping assembly; 3100. Clamping base; 3110. Round hole; 3200. Linkage ring plate; 3210. Channel; 3220. Hinge hole; 3230. Pushing boss; 3300. Link member; 3310. First link; 3320. Second link; 3330. Third link; 3400. Slide member; 3410. First slider; 3420. Second slider; 3430. Third slider; 34440. Hinge shaft; 3500. Transmission member; 3510. Clamping lead screw; 3520. First transmission block; 3530. Second transmission block; 3600. Clamping roller; 3610. Locking member;

[0030] 4000. Grinding platform;

[0031] 5000. Grinding assembly; 5100. Transverse movement trolley; 5200. Grinding motor; 5300. Grinding piece;

[0032] 6100. Transmitting end of the optical reflection sensor; 6200. Receiving end of the optical reflection sensor; 6300. Oil cylinder. Detailed implementation manners

[0033] To further understand the purpose, structure, characteristics and functions of the present utility model, the following is a detailed description in conjunction with embodiments.

[0034] As Figures 1-5 shown, a device for grinding the inner wall of an oil cylinder according to an embodiment of the present utility model includes:

[0035] A clamping platform 1000, a lifting assembly 2000, a clamping assembly 3000, a grinding platform 4000 and a grinding assembly 5000, and the clamping assembly 3000 includes a clamping base 3100, a linkage ring plate 3200, a link member 3300, a slide member 3400, a transmission member 3500 and a clamping roller 3600.

[0036] The lifting assembly 2000 is arranged on the clamping platform 1000. The output end of the lifting assembly 2000 passes through the clamping platform 1000 and is connected to the clamping assembly 3000. A plurality of lifting assemblies 2000 and clamping assemblies 3000 are provided. The grinding platform 4000 is located on one side of the clamping platform 1000, and the grinding assembly 5000 is arranged on the grinding platform 4000.

[0037] Wherein, when the device for grinding the inner wall of the oil cylinder of the present utility model grinds the inside of the oil cylinder 6300 to be repaired, the staff loosens the transmission member 3500, so that the linkage ring plate 3200 rotates on the clamping base 3100. The linkage ring plate 3200 rotates and the connecting rod member 3300 equipped with the slider member 3400 rotates, so that the connecting rod member 3300 expands outwards. At this time, the staff places the oil cylinder 6300 to be repaired and ground into the linkage ring plate 3200. At this time, the staff screws the transmission member 3500 clockwise, so that the linkage ring plate 3200 rotates clockwise on the clamping base 3100. The linkage ring plate 3200 rotates to drive the slider member 3400 to move towards the clamping roller 3600 on the connecting rod member 3300, so that the slider member 3400 pulls the connecting rod member 3300, so that the connecting rod member 3300 contracts inwards to clamp the oil cylinder 6300. After the oil cylinder 6300 is clamped, the staff operates the lifting assembly 2000 to lift the clamping assembly 3000, so that the central position of the oil cylinder on the clamping assembly 3000 is at the same horizontal height position as the central position of the output shaft of the grinding motor 5200 of the grinding assembly 5000. After the height position of the oil cylinder is adjusted, the staff starts the grinding assembly 5000 to move towards the oil cylinder 6300, so that the grinding piece 5300 of the grinding assembly 5000 extends into the inner wall of the oil cylinder. At this time, the grinding piece 5300 is in a rotating state under the action of the grinding motor 5200 and continuously grinds the inner wall of the oil cylinder until the inner wall of the oil cylinder is ground. At this time, the staff controls the grinding assembly 5000 to return to the initial position, so that the grinding piece 5300 exits the oil cylinder. Then the lifting assembly 2000 is lowered, so that the lifting assembly 2000 returns to the initial position. At this time, the staff screws the transmission member 3500 counterclockwise, so that the linkage ring plate 3200 rotates counterclockwise on the clamping base 3100. The linkage ring plate 3200 rotates to drive the slider member 3400 to move away from the clamping roller 3600 on the connecting rod member 3300, so that the slider member 3400 pulls the connecting rod member 3300, so that the connecting rod member 3300 expands outwards to clamp the oil cylinder 6300, which is convenient for the staff to take out the processed oil cylinder.

[0038] Further, as Figure 1 and Figure 2As shown in the figure, the number of lifting components 2000 and clamping components 3000 is the same. The lifting component 2000 includes a lead screw lifting member 2100 and a lifting bottom plate 2200. The lead screw lifting member 2100 is arranged on the bottom surface of the clamping platform 1000, and the output end of the lead screw lifting member 2100 passes through the clamping platform 1000 and is connected to the lifting bottom plate 2200. When the lead screw lifting member 2100 is in the initial state, the lifting bottom plate 2200 is in planar contact with the clamping platform 1000.

[0039] Furthermore, as Figure 2 shown in the figure, the clamping base 3100 is arranged on the lifting bottom plate 2200. The clamping base 3100 is provided with a round hole 3110, and the round hole 3110 is provided with internal threads. At the same time, one end of the linkage ring plate 3200 is provided with external threads. Among them, the external threads at one end of the linkage ring plate 3200 are matched with the internal threads of the round hole 3110. And the clamping base 3100 is provided with a first hinge table hole 3120, a second hinge table hole 3220, a third hinge table hole 3230 and a fourth hinge table hole 3240. The first hinge table hole 3120, the second hinge table hole 3220 and the third hinge table hole 3230 are arranged around the round hole 3110, and the fourth hinge table hole 3240 is close to the first hinge table hole 3120. The first hinge table hole 3120, the second hinge table hole 3220 and the third hinge table hole 3230 are all matched with the connecting rod member 3300, and the fourth hinge table hole 3240 is matched with the transmission member 3500. The linkage ring plate 3200 rotates on the round hole 3110 of the clamping base 3100 through the thread, so that the linkage ring plate 3200 is screwed into or out of the round hole 3110.

[0040] Furthermore, as Figure 3 、 Figure 4 and Figure 5 shown in the figure, the transmission member 3500 includes a clamping lead screw 3510, a first transmission block 3520 and a second transmission block 3530. The clamping lead screw 3510 passes through the first transmission block 3520 and the second transmission block 3530, and the first transmission block 3520 is hinged to the fourth hinge table hole 3240. One end of the clamping lead screw 3510 is provided with a tightening end, and the first transmission block 3520 is close to the tightening end. When the staff tightens the clamping lead screw 3510 clockwise, the second transmission block 3530 approaches the first transmission block 3520 on the clamping lead screw 3510, so that the second transmission block 3530 drives the linkage ring plate 3200 to rotate clockwise. When the staff loosens the clamping lead screw 3510 counterclockwise, the second transmission block 3530 moves away from the first transmission block 3520 on the clamping lead screw 3510, so that the second transmission block 3530 drives the linkage ring plate 3200 to rotate counterclockwise.

[0041] Furthermore, as Figure 3 and Figure 4As shown, the connecting rod member 3300 includes a first connecting rod 3310, a second connecting rod 3320, and a third connecting rod 3330. One ends of the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330 are respectively hinged to the first hinge platform hole 3120, the second hinge platform hole 3220, and the third hinge platform hole 3230. Clamping rollers 3600 are provided at the other ends of the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330, and locking members 3610 are provided on the clamping rollers 3600. The first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330 rotate respectively around the first hinge platform hole 3120, the second hinge platform hole 3220, and the third hinge platform hole 3230, while the clamping rollers 3600 at the other ends of the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330 contact the oil cylinder to be clamped. By providing the locking members 3610 on the clamping rollers 3600 to control the rotation of the clamping rollers 3600, the oil cylinder can be further clamped.

[0042] Furthermore, as Figure 3 and Figure 4 shown, the slider member 3400 includes a first slider 3410, a second slider 3420, and a third slider 3430. Channels are provided at the centers of the first slider 3410, the second slider 3420, and the third slider 3430, facilitating the first slider 3410, the second slider 3420, and the third slider 3430 to be sleeved on the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330, so as to facilitate the first slider 3410, the second slider 3420, and the third slider 3430 to slide on the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330. Hinge shafts 3440 are provided on the first slider 3410, the second slider 3420, and the third slider 3430. The first slider 3410, the second slider 3420, and the third slider 3430 cooperate with the linkage ring plate 3200, such that when the linkage ring plate 3200 rotates, it drives the first slider 3410, the second slider 3420, and the third slider 3430 to displace and slide on the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330, thereby driving the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330 to rotate around the first hinge platform hole 3120, the second hinge platform hole 3220, and the third hinge platform hole 3230.

[0043] Furthermore, as Figure 4 and Figure 5As shown in the figure, multiple hinge holes 3220 are provided in the channel 3210 of the linkage ring plate 3200. The hinge shafts 3440 of the first slider 3410, the second slider 3420, and the third slider 3430 are matched with the hinge holes 3220 in the channel 3210 to realize the cooperation between the slider member 3400 and the linkage ring plate 3200. A pushing boss 3230 is provided on the outer side of the linkage ring plate 3200, so that the pushing boss 3230 is matched with the second transmission block 3530. The second transmission block 3530 is far from the first transmission block 3520 on the clamping lead screw 3510. The second transmission block 3530 drives the pushing boss 3230 to make the linkage ring plate 3200 rotate counterclockwise. At this time, the linkage ring plate 3200 drives the first slider 3410, the second slider 3420, and the third slider 3430 to move, so that the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330 rotate around the first hinge platform hole 3120, the second hinge platform hole 3220, and the third hinge platform hole 3230 through the first slider 3410, the second slider 3420, and the third slider 3430, thereby expanding the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330. Similarly, when the second transmission block 3530 approaches the first transmission block 3520 on the clamping lead screw 3510, the linkage ring plate 3200 rotates clockwise to drive the first connecting rod 3310, the second connecting rod 3320, and the third connecting rod 3330 to contract.

[0044] Furthermore, as Figure 2 shown, a transport channel 3210 is provided on the grinding platform 4000. The grinding assembly 5000 includes a grinding motor 5200, a transverse moving trolley 5100, and a grinding piece 5300. The transverse moving trolley 5100 is arranged on the transport channel 3210, the grinding motor 5200 is arranged on the transverse moving trolley 5100, and the grinding piece 5300 is arranged at the output end of the grinding motor 5200. The transverse moving trolley 5100 is driven by a motor, so that the transverse moving trolley 5100 moves in the transport channel 3210 on the grinding platform 4000, thereby driving the grinding motor 5200 by the transverse moving trolley 5100.

[0045] Furthermore, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown in the figure, the device for grinding the inner wall of the oil cylinder further includes an alignment component, which includes the transmitting end 6100 of the optical reflection sensor and the receiving end 6200 of the optical reflection sensor. The transmitting end 6100 of the optical reflection sensor is arranged on the clamping base 3100, and the height position of the transmitting end 6100 of the optical reflection sensor is the same as the central height position of the circular hole 3110 of the clamping base 3100. The receiving end 6200 of the optical reflection sensor is arranged on the grinding motor 5200, and the height of the receiving end 6200 of the optical reflection sensor from the grinding platform 4000 is the same as the height of the output end of the grinding motor 5200 from the grinding platform 4000. When operating the lifting oil cylinder, by lifting the lifting base plate 2200, when the transmitting end 6100 of the optical reflection sensor on the clamping base 3100 coincides with the receiving end 6200 of the optical reflection sensor on the grinding motor 5200, stop the lead screw lifting member 2100. At this time, the grinding member 5300 is located at the center of the inner wall of the oil cylinder, which is convenient for personnel to align the grinding member 5300 with the center of the inner wall of the oil cylinder, facilitating subsequent uniform grinding and improving the grinding quality.

[0046] Preferably, the device for grinding the inner wall of the oil cylinder further includes a controller and a servo motor. The servo motor cooperates with the lead screw lifting member to accurately control the height of the lifting base plate 2200. At the same time, the transverse movement trolley 5100, the servo motor, the alignment component and the grinding motor 5200 are all connected to the controller. The controller adopts a PLC controller, enabling personnel to pre-edit the program to control the automatic operation of the overall device. For example, after the personnel complete the clamping of the oil cylinder, the lead screw lifting member 2100 is started to lift the lifting base plate 2200. When the receiving end 6200 of the optical reflection sensor of the grinding motor 5200 receives the signal from the transmitting end 6100 of the optical reflection sensor on the clamping base plate, it converts the optical signal into an electrical signal and inputs it into the controller. The controller converts the received electrical signal into a program and controls the transverse movement trolley 5100 to move horizontally towards the oil cylinder until the grinding member 5300 penetrates into the inner wall of the oil cylinder. At this time, the grinding member 5300 is always in a rotating state under the action of the grinding motor 5200, thereby grinding the inner wall of the oil cylinder. The staff can set the number of grinding times to achieve a refined grinding effect on the inner wall of the oil cylinder.

[0047] Preferably, the device for grinding the inner wall of the oil cylinder further includes a fastening block. The fastening block is arranged at the other end of the clamping lead screw 3510 close to the second transmission block 3530. After the clamping component 3000 clamps the oil cylinder, the fastening block is screwed in from the other end of the clamping lead screw 3510 and approaches the second transmission block 3530. The fastening block further locks the clamping component 3000, making the subsequent grinding of the oil cylinder more stable.

[0048] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" in terms of orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0049] The present utility model has been described by the above relevant embodiments. However, the above embodiments are only examples for implementing the present utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present utility model. On the contrary, modifications and refinements made without departing from the spirit and scope of the present utility model fall within the scope of the patent protection of the present utility model.

Claims

1. A device for grinding the inner wall of an oil cylinder, characterized in that, Comprising: Clamping platform; Lifting assembly, the lifting assembly is arranged on the clamping platform; Clamping assembly, the clamping assembly is arranged on the lifting assembly, the clamping assembly includes a clamping base, a linkage ring plate, a connecting rod member, a slider member, a transmission member and a clamping roller, the clamping base is arranged on the lifting assembly, one end of the linkage ring plate is threadedly connected with the clamping base, the transmission member controls the linkage ring plate to rotate on the clamping base, one end of the connecting rod member is hinged on the clamping base, the slider member is sleeved on the connecting rod member, the other end of the linkage ring plate is provided with a channel, the connecting rod member is arranged in the channel, the slider member is hinged with the channel, and the connecting rod member moves in the channel, and the other end of the connecting rod member is provided with the clamping roller; Grinding platform, the grinding platform is arranged on one side of the clamping platform; Grinding assembly, the grinding assembly is arranged on the grinding platform.

2. The device for polishing the inner wall of the oil cylinder according to claim 1, wherein The number of the lifting assemblies is the same as that of the clamping assemblies, the lifting assembly includes a lead screw lifting member and a lifting bottom plate, the lead screw lifting member is arranged on the bottom surface of the clamping platform, and the output end of the lead screw lifting member passes through the clamping platform and is connected with the lifting bottom plate.

3. The device for polishing the inner wall of the oil cylinder according to claim 2, characterized in that, The clamping base is arranged on the lifting bottom plate, the clamping base is provided with a round hole, the round hole is provided with internal threads, one end of the linkage ring plate is provided with external threads, so that the internal threads of the clamping base are matched with the external threads of one end of the linkage ring plate, the clamping base is provided with a first hinge platform hole, a second hinge platform hole, a third hinge platform hole and a fourth hinge platform hole, the first hinge platform hole, the second hinge platform hole and the third hinge platform hole are arranged around the round hole, and the fourth hinge platform hole is close to the first hinge platform hole.

4. The device for grinding the inner wall of the oil cylinder according to claim 3, characterized in that, The transmission member includes a clamping lead screw, a first transmission block and a second transmission block, the clamping lead screw passes through the first transmission block and the second transmission block, and the first transmission block is hinged with the fourth hinge platform.

5. The device for polishing the inner wall of the oil cylinder according to claim 4, wherein, The connecting rod member includes a first connecting rod, a second connecting rod and a third connecting rod, one ends of the first connecting rod, the second connecting rod and the third connecting rod are respectively hinged with the first hinge platform hole, the second hinge platform hole and the third hinge platform hole, the other ends of the first connecting rod, the second connecting rod and the third connecting rod are provided with the clamping rollers, and the clamping rollers are provided with locking members.

6. The device for polishing the inner wall of the oil cylinder according to claim 5, wherein, The slider member includes a first slider, a second slider and a third slider, channels are arranged at the centers of the first slider, the second slider and the third slider, the first slider, the second slider and the third slider are respectively sleeved on the first connecting rod, the second connecting rod and the third connecting rod, so that the first slider, the second slider and the third slider slide on the first connecting rod, the second connecting rod and the third connecting rod, and the first slider, the second slider and the third slider are all provided with hinge shafts.

7. The device for grinding the inner wall of the oil cylinder according to claim 6, characterized in that, A plurality of hinge holes are provided in the channel of the linkage ring plate, and the hinge shafts of the first slider, the second slider, and the third slider are matched with the hinge holes of the channel. A pushing boss is provided on the outer side of the linkage ring plate, and the pushing boss is matched with the second transmission block.

8. The device for polishing the inner wall of the oil cylinder according to claim 7, characterized in that, A transportation channel is provided on the grinding platform. The grinding assembly includes a transverse moving trolley, a grinding motor, and a grinding member. The transverse moving trolley is arranged on the transportation channel, the grinding motor is arranged on the transverse moving trolley, and the grinding member is arranged at the output end of the grinding motor.

9. The device for grinding the inner wall of the oil cylinder according to claim 8, wherein An alignment assembly is further included. The alignment assembly includes a transmitting end of an optical reflection sensor and a receiving end of the optical reflection sensor. The transmitting end of the optical reflection sensor is arranged on the clamping base. The height position of the transmitting end of the optical reflection sensor from the lifting bottom plate is the same as the height position of the center of the circular hole from the lifting bottom plate. The receiving end of the optical reflection sensor is arranged on the grinding motor, and the horizontal height position of the receiving end is at the same horizontal position as the horizontal height position of the output end of the grinding motor.

10. The device for grinding the inner wall of the oil cylinder according to claim 9, characterized in that, A controller and a servo motor are further included. The servo motor is matched with the screw lifting member. The transverse moving trolley, the servo motor, the alignment assembly, and the grinding motor are all connected to the controller.

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