Flexible polishing device and method for inner hole of shaft sleeve

Abstract

The invention relates to the technical field of shaft sleeve polishing, and provides a flexible polishing device and method for an inner hole of a shaft sleeve. The polishing device comprises a base, a chain conveying belt which is driven by a conveying motor and used for conveying the shaft sleeve is installed on the base, and a supporting table is arranged on the chain conveying belt to support the shaft sleeve; a sliding push plate is mounted on one side of the base through a horizontal side plate; it can be understood that on the chain conveying belt, a plurality of shaft sleeves in conveying are clamped through the supporting table and the pressing plate; a driving mechanism drives a plurality of hollow shafts to rotate synchronously, and the far ends of the hollow shafts are supported through polygonal columns, butt joint rods and butt joint sleeves so as to be kept horizontal. An annular brush is arranged at the front end of the hollow shaft to clean the inner hole to prevent scratching when penetrating into and drawing out the shaft sleeve; the air bag is installed on the hollow shaft, the multiple polishing layers conduct flexible, continuous and multiple polishing on the inner hole of the shaft sleeve after inflation expansion, rigid impact of traditional polishing is avoided, and the polishing efficiency, precision and automation degree are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of bushing polishing, and more specifically, to a flexible polishing device and method for the inner hole of a bushing. Background Art

[0002] The aluminum alloy steering pump bushing is a key precision component in an automotive power steering pump. It is usually press-fitted into the inner hole of the pump body or end cover. Its main function is to provide precise and stable rotational support for the drive shaft (or rotor shaft) of the steering pump, forming an important friction pair. It is made of aluminum alloy (such as high-strength cast aluminum alloy). The main purpose is to achieve the lightweight of the component while ensuring sufficient strength and wear resistance, and utilize the good thermal conductivity of aluminum alloy to help dissipate the heat generated by the shaft system friction. The inner hole size accuracy, geometric shape (roundness, cylindricity) and surface quality are crucial for ensuring the mechanical efficiency, working stability, sealing performance and service life of the pump; The polishing of the inner hole of the bushing is a finishing process aimed at significantly reducing the micro-roughness of the inner hole working surface to achieve a mirror or near-mirror effect. The existing method is to use a bench drill with a floating chuck to hold a fine-grained abrasive strip and achieve polishing through rotation. Although the required polishing effect can be achieved, the bench drill can only polish the inner hole of one bushing at a time, the operation is not convenient enough, the efficiency is low, and when it comes to multi-stage polishing, it is necessary to replace the abrasive strip on the drill or use another drill, which affects the processing progress of the bushing; To solve the above problems, a flexible polishing device and method for the inner hole of a bushing are proposed in this application. Summary of the Invention

[0003] The purpose of the present invention is to provide a flexible polishing device and method for the inner hole of a bushing to solve the problems in the prior art through efficient and multi-stage polishing.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A flexible polishing device for the inner hole of a bushing, including a base. A chain conveyor belt driven by a conveying motor and used for conveying bushings is installed on the base. A support table is provided on the chain conveyor belt to support the bushing. A sliding push plate is installed on one side of the base through a horizontal side plate. A plurality of horizontally arranged hollow shafts are rotatably installed on the push plate. An airbag is sleeved outside the hollow shaft. The surface of the airbag is provided with a first polishing layer and a second polishing layer with different mesh numbers. A polygon column that slides horizontally is installed on the other side of the base through a vertical side plate. The hollow shaft axially engages with the polygon column after passing through the bushing. A top plate is fixed between the tops of the horizontal side plate and the vertical side plate. A pressing plate corresponding to the support table is installed on the top plate through a pressing cylinder. The support table on the chain conveyor belt cooperates with the pressing plate to clamp multiple bushings during the conveying process, facilitating batch polishing and easy automatic loading and unloading.

[0005] Preferably, one end of the hollow shaft is formed with a connecting pipe and is rotatably connected to the push plate. The position of the hollow shaft sleeved by the airbag is provided with air holes in the radial direction. A multi-channel air pump is installed on the horizontal side plate, and the multi-channel air pump supplies air to the airbag through the hollow shaft.

[0006] Preferably, both ends of the airbag are hermetically attached to the outer wall of the hollow shaft and form a cavity inside. The first polishing layer and the second polishing layer are located outside the cavity and are distributed along the axial direction. A driving gear is fixed to the outside of the airbag near the push plate and attached to the hollow shaft. The multi-stage polishing of the inflated airbag and its first polishing layer and second polishing layer is used for flexible polishing of the inner hole of the shaft sleeve, avoiding the rigid impact between the traditional polishing part and the shaft sleeve, improving the precision and efficiency, and eliminating the need for shutdown and replacement.

[0007] Preferably, a ring brush is fixed to the outer end of the hollow shaft away from the push plate. The diameter of the circumferential distribution range of the bristles on the ring brush is larger than the inner diameter of the shaft sleeve. The ring brush can clean the inner hole of the shaft sleeve when penetrating and withdrawing, preventing large particles from scratching and reducing dust accumulation.

[0008] Preferably, a docking rod is formed at one end of the hollow shaft close to the polygonal column. A docking sleeve is rotatably connected to one end of the polygonal column close to the hollow shaft and is axially inserted and matched with the docking rod. The polygonal column supports the far end of the hollow shaft through the docking rod and the docking sleeve, ensuring that the airbag remains horizontal during polishing and improving the polishing fineness.

[0009] Preferably, a baffle is fixed to the end of the polygonal column away from the hollow shaft. A docking spring that abuts against each other is provided between the baffle and the outer side of the vertical side plate, and the docking spring is also sleeved on the outside of the polygonal column.

[0010] Preferably, a support plate that forms a support inside the upper end of the inner side of the chain conveyor belt is fixedly installed inside the base, and the support plate is located directly below the pressing plate.

[0011] Preferably, a transmission gear driven by a polishing motor is rotatably installed on the push plate. The transmission gear is located between two adjacent driving gears and meshes with each other. Multiple hollow shafts and airbags rotate synchronously under the drive of the gears, directly polishing the shaft sleeve being conveyed on the chain conveyor belt, saving the handling time.

[0012] Preferably, an electric slide rail and a linear track are installed between the push plate and the bottom of the horizontal side plate. Two groups of linear tracks are provided and are symmetrically distributed on both sides of the electric slide rail.

[0013] The present invention also provides a method for flexible polishing of the inner hole of a shaft sleeve. According to the polishing device described above, the steps of the polishing method are as follows: S1. Place the bushing on the support platform at the upper end of the chain conveyor belt through an automatic feeding machine. Start the conveyor motor to drive the rotation of the chain conveyor belt, thereby driving the bushing on the support platform for transportation. After the bushing is transported directly below the pressing plate, turn off the conveyor motor to stop the transportation. S2. The pressing cylinder drives the pressing plate to move downward and presses the bushing against the support platform. S3. The electric slide rail pushes the push plate, hollow shaft, airbag, and annular brush towards the polygonal column. The hollow shaft and airbag pass through the bushing. During the process of the hollow shaft passing through, the annular brush contacts the inner hole of the bushing for cleaning, and the docking rod is inserted into the docking sleeve. At this time, the first polishing layer is located inside the bushing. S4. After starting the polishing motor, drive the hollow shaft and airbag to rotate under the action of the transmission gear and driving gear. At this time, the multi-channel air pump supplies air to the airbag to make it expand. The first polishing layer contacts the inner wall of the bushing, and then polishes the inner hole under the action of rotation. S5. Move the electric slide rail again to make the second polishing layer enter the inner hole for polishing. During this process, the polygonal column is pushed to slide horizontally on the vertical side plate. S6. After polishing, the multi-channel air pump deflates to reset the airbag to its original size. The second polishing layer does not contact the inner hole. The electric slide rail moves in the reverse direction. The polygonal column resets under the action of the docking spring. The hollow shaft and airbag move out from the side of the bushing. At this time, the annular brush cleans the inner hole of the bushing again. S7. The pressing cylinder drives the pressing plate to move upward, and the conveyor motor drives the chain conveyor belt to transport the bushing.

[0014] Advantages of the present invention: In the present invention, the inner hole of the bushing is polished by setting an airbag. The airbag inflates to achieve flexible polishing, avoiding the impact between the rigid polishing part and the bushing and affecting the polishing quality. At the same time, the first polishing layer and the second polishing layer on the airbag can achieve multiple polishing. During this process, there is no need to stop the machine and replace, improving the efficiency and polishing accuracy. In the present invention, by setting multiple hollow shafts and airbags, and then driving the multiple hollow shafts and airbags to rotate synchronously for polishing under the cooperation of multiple transmission gears and driving gears, the polishing work is carried out on the chain conveyor belt, eliminating the time waste caused by moving the bushing again. In the present invention, by setting a support platform on the chain conveyor belt and then cooperating with the pressing plate, it is possible to hold multiple bushings while taking into account transportation, thereby facilitating the simultaneous polishing of multiple bushings. Moreover, after the chain conveyor belt is combined with the automatic feeding machine, automatic transportation and blanking can be realized, improving the polishing efficiency. In the present invention, by setting a polygonal column and connecting a docking rod and a docking sleeve between the polygonal column and the hollow shaft, it is possible to provide a reliable support for the end of the hollow shaft far from the push plate during polishing, ensuring the levelness of the airbag during the polishing process, and thus guaranteeing the polishing fineness of the bushing. In the present invention, an annular brush is provided at the front end of the hollow shaft. The annular brush can clean the inside of the shaft sleeve during the process of the hollow shaft passing through the shaft sleeve, preventing large particles from being pressed between the shaft sleeve and the airbag to cause wear and scratches. At the same time, the annular brush can clean the inside of the shaft sleeve when the hollow shaft is withdrawn, avoiding dust accumulation in the shaft sleeve and increasing the subsequent cleaning difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 is Figure 1 a schematic diagram of the rear side looking up; Figure 3 is Figure 1 a schematic diagram of the front view; Figure 4 is Figure 3 a schematic diagram of a partial cross-section; Figure 5 is a schematic diagram of a partial disassembly; Figure 6 is a schematic diagram of the connection structure of the polishing motor, transmission gear and driving gear; In the drawings, the list of components represented by each reference numeral is as follows: In the figure: 1, base; 11, horizontal side plate; 12, vertical side plate; 13, top plate; 2, chain conveyor belt; 21, support table; 22, conveyor motor; 23, support plate; 3, push plate; 31, electric slide rail; 32, linear track; 33, polishing motor; 34, transmission gear; 4, hollow shaft; 41, connecting pipe; 42, air hole; 43, docking rod; 5, airbag; 51, first polishing layer; 52, second polishing layer; 53, driving gear; 6, annular brush; 7, polygonal column; 701, baffle; 71, docking sleeve; 72, docking spring; 8, pressing plate; 81, pressing cylinder; 9, multi-channel air pump; 10, shaft sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0018] As Figure 1 - Figure 6 shown: A flexible polishing device for the inner hole of a shaft sleeve, comprising a base 1, on which a chain conveyor belt 2 driven by a conveying motor 22 and used for conveying the shaft sleeve 10 is installed. The conveying motor 22 is fixed on one side and the output sprocket is fixed. There are at least two sprockets for spreading the chain conveyor belt 2, and at the same time, the sprockets and the chain are meshed with each other to achieve power transmission. A support table 21 is provided on the chain conveyor belt 2 to support the shaft sleeve 10. The support table 21 is of a split structure and can be fixed by welding or bolts. The split structure of the support table 21 can smoothly pass through the arc area on the chain conveyor belt 2 and achieve continuous conveying in one direction. Moreover, the overall upper surface of the support table 21 fits the outer contour of the shaft sleeve 10, thereby forming a reliable support. Inside the base 1, a support plate 23 that forms a support at the upper end inside the chain conveyor belt 2 is fixedly installed. The support plate 23 is located directly below the pressing plate 8. The support plate 23 is used for the bottom support when the pressing plate 8 and the support table 21 press the shaft sleeve 10, preventing the pressing area of the chain conveyor belt 2 from collapsing. At the same time, in order to reduce friction, the top of the support plate 23 is a smooth surface, or it can also be in the form of rollers in contact with the chain conveyor belt 2, as long as it is ensured that the shaft sleeve 10 can be pressed at the conveying position. Further, on one side of the base 1, a sliding push plate 3 is installed through a horizontal side plate 11. An electric slide rail 31 and a linear track 32 are installed between the push plate 3 and the bottom of the horizontal side plate 11. In order to improve the sliding stability of the push plate 3 and its connecting parts, two groups of linear tracks 32 are provided and distributed symmetrically on both sides of the electric slide rail 31. Both the electric slide rail 31 and the linear track 32 are composed of a track and a slider. The track among them is fixed to the bottom of the horizontal side plate 11 by bolts, and the slider is fixed to the push plate 3 by bolts. The electric slide rail 31 can adopt a motor and screw matching structure or an electromagnetic structure, mainly used to drive the reciprocating translation of the push plate 3.

[0019] Further, a transmission gear 34 driven by a polishing motor 33 is rotatably installed on the push plate 3. The transmission gear 34 is located between two adjacent driving gears 53 and meshed with them. In this embodiment, through the meshing of multiple transmission gears 34 and multiple driving gears 53, the synchronous rotation of all the hollow shafts 4 and the air bags 5 is realized. The specific arrangement of the gears is as Figure 6 shown.

[0020] Specifically, several horizontally arranged hollow shafts 4 are rotatably installed on the push plate 3. An airbag 5 is sleeved outside the hollow shaft 4. On the other side of the base 1, a horizontally sliding polygonal column 7 is installed through a vertical side plate 12. The hollow shaft 4 axially engages with the polygonal column 7 after passing through the bushing 10. A top plate 13 is fixed between the top of the horizontal side plate 11 and the vertical side plate 12. A pressing plate 8 corresponding to the support table 21 is installed on the top plate 13 through a pressing cylinder 81.

[0021] Furthermore, one end of the hollow shaft 4 is formed with a connecting pipe 41 and is rotatably connected to the push plate 3. Air holes 42 are provided in the radial direction at the position where the hollow shaft 4 is sleeved by the airbag 5. A multi-channel air pump 9 is installed on the horizontal side plate 11. The multi-channel air pump 9 supplies air to the airbag 5 through the hollow shaft 4. In this embodiment, when the connecting pipe 41 is connected to the multi-channel air pump 9, a rotatable air pipe joint is connected to the outside of the connecting pipe 41, and then it is connected to the multi-channel air pump 9 through a hose, so that air supply can be carried out while rotating.

[0022] Furthermore, the surface of the airbag 5 is provided with a first polishing layer 51 and a second polishing layer 52 with different mesh numbers. Both ends of the airbag 5 are hermetically bonded to the outer wall of the hollow shaft 4 by glue and form a cavity inside. The first polishing layer 51 and the second polishing layer 52 are located outside the cavity and are axially distributed. A driving gear 53 is fixed to the outside of the airbag 5 near the push plate 3 and in contact with the hollow shaft 4. The axially distributed polishing layers can be quickly switched without shutting down the machine and replacing the polishing tools, adapting to the multi-stage polishing of the inner hole of the bushing 10 and making the polishing work more delicate.

[0023] Furthermore, a ring brush 6 is fixed to the outside of the hollow shaft 4 away from the push plate 3. The diameter of the circumferential distribution range of the bristles on the ring brush 6 is larger than the inner diameter of the bushing 10. In this embodiment, the ring brush 6 includes an inner ring and bristles arranged on the outside of the inner ring along the circumferential direction. The inner ring is fixed to the outside of the hollow shaft 4 by welding or bolts. The overall bristle range larger than the inner hole diameter of the bushing 10 can clean the inner hole when the ring brush 6 enters and exits, reducing dust retention.

[0024] Furthermore, a docking rod 43 is formed at one end of the hollow shaft 4 close to the polygonal column 7. A docking sleeve 71 is rotatably connected to one end of the polygonal column 7 close to the hollow shaft 4 and axially inserted and matched with the docking rod 43. In this embodiment, both the docking part of the docking rod 43 and the docking sleeve 71 are polygonal structures. Moreover, in order to ensure that the two can always be docked, a chamfer is formed at the front end of the docking rod 43. This chamfer can automatically dock the profiles of the docking rod 43 and the docking sleeve 71 when they are sleeved together.

[0025] Further, a baffle 701 is fixed to one end of the polygonal column 7 away from the hollow shaft 4. A docking spring 72 that abuts against each other is provided between the baffle 701 and the outer side of the vertical side plate 12, and the docking spring 72 is also sleeved outside the polygonal column 7. In this embodiment, when the docking spring 72 is in a normal state, the docking rod 43 can be fully inserted into the docking sleeve 71. In this state, the first polishing layer 51 is located in the inner hole of the shaft sleeve 10 to ensure the support for the hollow shaft 4 and the airbag 5.

[0026] The present invention also provides a method for flexible polishing of the inner hole of a shaft sleeve. According to the polishing device described above, the steps of the polishing method are as follows: S1. Place the shaft sleeve 10 on the support table 21 at the upper end of the chain conveyor belt 2 through an automatic feeding machine. Start the conveyor motor 22 to drive the chain conveyor belt 2 to rotate, thereby driving the shaft sleeve 10 on the support table 21 for conveying. After the shaft sleeve 10 is conveyed directly below the pressing plate 8, stop the conveyor motor 22 to stop the conveying. S2. The pressing cylinder 81 drives the pressing plate 8 to move downward and presses the shaft sleeve 10 against the support table 21. An arc-shaped area is formed at the bottom of the pressing plate 8 corresponding to the support table 21, so as to form a clamping at the upper and lower ends outside the shaft sleeve 10, and the clamping direction is radial. S3. The electric slide rail 31 pushes the push plate 3, the hollow shaft 4, the airbag 5, and the annular brush 6 towards the polygonal column 7. The hollow shaft 4 and the airbag 5 pass through the shaft sleeve 10. During the process of the hollow shaft 4 passing through, the annular brush 6 contacts the inner hole of the shaft sleeve 10 for cleaning, and the docking rod 43 is inserted into the docking sleeve 71. At this time, the first polishing layer 51 is located inside the shaft sleeve 10. S4. After starting the polishing motor 33, drive the hollow shaft 4 and the airbag 5 to rotate under the action of the transmission gear 34 and the driving gear 53. At this time, the multi-channel air pump 9 supplies air to the airbag 5 to make it expand, and the first polishing layer 51 contacts the inner wall of the shaft sleeve 10, and then polishes the inner hole under the action of rotation. S5. Move the electric slide rail 31 again to make the second polishing layer 52 enter the inner hole for polishing. During this process, the polygonal column 7 is pushed to slide horizontally on the vertical side plate 12, and the docking spring 72 is stretched accordingly. S6. After polishing is completed, the multi-channel air pump 9 deflates to make the airbag 5 return to its original size, the second polishing layer 52 does not contact the inner hole, the electric slide rail 31 moves in the reverse direction, the polygonal column 7 returns under the action of the docking spring 72, the hollow shaft 4 and the airbag 5 are moved out from the side of the shaft sleeve 10, and at this time the annular brush 6 cleans the inner hole of the shaft sleeve 10 again. S7. The pressing cylinder 81 drives the pressing plate 8 to move upward, and the conveyor motor 22 drives the chain conveyor belt 2 to convey the shaft sleeve 10. The polished shaft sleeve 10 is conveyed to the next process or into a collection basket, and the unpolished shaft sleeve 10 is conveyed below the pressing plate 8, which is the polishing station. It can be understood that on the chain conveyor, a plurality of bushings being conveyed are clamped by a support table and a pressing plate; a plurality of hollow shafts are synchronously rotated by a driving mechanism, and the distal ends of the hollow shafts are supported by a polygonal column, a docking rod and a docking sleeve to maintain horizontal; an annular brush is arranged at the front end of the hollow shaft to clean the inner hole when penetrating into and withdrawing from the bushing to prevent scratching; an airbag is installed on the hollow shaft, and after being inflated, a plurality of polishing layers perform flexible and continuous multi-polishing on the inner hole of the bushing, avoiding the rigid impact of traditional polishing, and significantly improving the polishing efficiency, accuracy and automation degree.

[0027] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; it should be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or position relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flexible polishing device for the inner hole of a shaft sleeve, comprising a base (1), characterized in that: A chain conveyor belt (2) driven by a conveying motor (22) and used for conveying bushings (10) is installed on the base. A support platform (21) is arranged on the chain conveyor belt to support the bushing. On one side of the base, a sliding push plate (3) is installed through a horizontal side plate (11). A plurality of horizontally arranged hollow shafts (4) are rotatably installed on the push plate. An airbag (5) is sleeved outside the hollow shaft. The surface of the airbag is provided with a first polishing layer (51) and a second polishing layer (52) with different mesh numbers. On the other side of the base, a horizontally sliding polygonal column (7) is installed through a vertical side plate (12). The hollow shaft axially inserts into the polygonal column after passing through the bushing. A top plate (13) is fixed between the tops of the horizontal side plate and the vertical side plate. A pressing plate (8) corresponding to the support platform is installed on the top plate through a pressing cylinder (81).

2. The flexible polishing device for the inner hole of the shaft sleeve according to claim 1, wherein: One end of the hollow shaft is formed with a connecting pipe (41) and is rotatably connected to the push plate. Air holes (42) are arranged radially at the position where the hollow shaft is sleeved by the airbag. A multi-channel air pump (9) is installed on the horizontal side plate. The multi-channel air pump supplies air to the airbag through the hollow shaft.

3. A flexible polishing device for the inner hole of a shaft sleeve according to claim 1, characterized in that: Both ends of the airbag are hermetically attached to the outer wall of the hollow shaft and form a cavity inside. The first polishing layer and the second polishing layer are located outside the cavity and are axially distributed. A driving gear (53) is fixed outside the airbag near the push plate and attached to the hollow shaft.

4. A flexible polishing device for the inner hole of a shaft sleeve according to claim 1, characterized in that: An annular brush (6) is fixed at the end of the hollow shaft away from the push plate. The diameter of the circumferential distribution range of the bristles on the annular brush is larger than the inner diameter of the bushing.

5. A flexible polishing device for the inner hole of a shaft sleeve according to claim 1, characterized in that: One end of the hollow shaft near the polygonal column is formed with a docking rod (43). One end of the polygonal column near the hollow shaft is rotatably connected with a docking sleeve (71) which axially inserts and cooperates with the docking rod.

6. The flexible inner hole polishing device for a shaft sleeve according to claim 1, wherein: A baffle (701) is fixed at the end of the polygonal column away from the hollow shaft. A docking spring (72) which abuts against each other is arranged between the baffle and the outer side of the vertical side plate, and the docking spring is also sleeved outside the polygonal column.

7. The flexible inner hole polishing device for a shaft sleeve according to claim 1, characterized in that: A support plate (23) which forms a support inside the upper end of the inner side of the chain conveyor belt is fixedly installed inside the base. The support plate is located directly below the pressing plate.

8. A flexible polishing device for the inner hole of a shaft sleeve according to claim 1, characterized in that: A transmission gear (34) driven by a polishing motor (33) is rotatably installed on the push plate. The transmission gear is located between two adjacent driving gears and meshes with each other.

9. A flexible polishing device for the inner hole of a shaft sleeve according to claim 1, characterized in that: An electric slide rail (31) and a linear rail (32) are installed between the push plate and the bottom of the horizontal side plate. Two groups of the linear rails are symmetrically distributed on both sides of the electric slide rail.

10. A flexible polishing method for the inner hole of a shaft sleeve, characterized in that: According to the polishing device described in claims 1-9, the polishing method steps are as follows: S1. Place the bushings on the support platform at the upper end of the chain conveyor belt through an automatic feeding machine. Start the conveying motor to drive the chain conveyor belt to rotate, so as to drive the bushings on the support platform for conveying. After the bushings are conveyed directly below the pressing plate, turn off the conveying motor to stop the conveying. S2. The pressing cylinder drives the pressing plate to move downwards and presses the bushings on the support platform. S3. The electric slide rail pushes the push plate, hollow shaft, airbag, and annular brush towards the polygonal column. The hollow shaft and the airbag pass through the bushing. During the process of the hollow shaft passing through, the annular brush contacts the inner hole of the bushing for cleaning, and the docking rod is inserted into the docking sleeve. At this time, the first polishing layer is located inside the bushing; S4. After starting the polishing motor, the hollow shaft and the airbag are driven to rotate under the action of the transmission gear and the driving gear. At this time, the multi-channel air pump supplies air to the airbag to make it expand, and the first polishing layer contacts the inner wall of the bushing, and then polishes the inner hole under the action of rotation; S5. The second polishing layer enters the inner hole for polishing by the further movement of the electric slide rail. During this process, the polygonal column is pushed to slide horizontally on the vertical side plate; S6. After polishing, the multi-channel air pump deflates to reset the airbag to its original size. The second polishing layer does not contact the inner hole. The electric slide rail moves in the reverse direction, and the polygonal column is reset under the action of the docking spring. The hollow shaft and the airbag move out from the side of the bushing. At this time, the annular brush cleans the inner hole of the bushing again; S7. The pressing cylinder drives the pressing plate to move upward, and the conveying motor drives the chain conveyor belt to convey the bushing.

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