A double-sided polishing device and polishing method special for a planetary gear

Abstract

The application discloses a double-face polishing device and polishing method special for wandering star wheels, and relates to the technical field of wandering star wheel machining. The polishing main body is internally connected with an extension block at the center of the bottom of the inner wall, and the top center of the extension block is fixedly connected with a supporting column, and the top center of the supporting column is fixedly connected with a supporting plate. The transmission motor drives the transmission rod arranged at the output end, the synchronous belt drives the connecting rod to rotate, the bearing frame takes the connecting rod as the center, the supporting ring is driven to rotate, the supporting ring and the lower polishing disc arranged at the top thereof are slightly inclined, the problem that the cooling liquid containing grinding dust repeatedly rubs the inner wall of the through hole, the diameter of the through hole becomes larger and larger, the through hole is continuously damaged under the influence of inertia, the edge of the through hole is broken, burrs are generated, and the precision of the wandering star wheel is affected is further solved.

Description

Technical Field

[0001] This invention relates to the field of planetary wheel processing technology, specifically to a double-sided polishing device and polishing method for planetary wheels. Background Technology

[0002] As a key component in mechanical transmission and ultra-precision machining, the flatness, parallelism, and through-hole accuracy of the planetary gear directly determine the subsequent transmission stability and the pass rate of processed products. Therefore, it is necessary to perform precision machining on it using a special double-sided polishing device to meet stringent precision requirements.

[0003] Existing double-sided polishing devices for planetary wheels mainly use two grinding discs to clamp the planetary wheel body. The friction generated by the speed difference between the grinding discs, combined with the cooling and lubrication of the coolant, enables synchronous polishing of the upper and lower surfaces of the planetary wheel. However, the existing devices have significant defects in actual use, which seriously affect the machining accuracy of the planetary wheel and the product quality. During the polishing process, in order to reduce the grinding temperature, reduce the wear of the grinding discs, and remove the grinding debris, coolant needs to be continuously sprayed into the grinding area. However, because the planetary wheel is in a state of high-speed revolution and rotation during processing, the coolant, under the action of inertia, will carry a large amount of grinding debris into the through hole of the planetary wheel. During continuous polishing, the coolant containing grinding debris in the through hole cannot be discharged in time. The grinding debris will repeatedly rub against the inner wall of the through hole with the coolant. Over time, the diameter of the through hole will gradually increase, resulting in dimensional deviations. At the same time, the inertia generated by high-speed motion will cause the coolant containing grinding debris to continuously impact the edge of the through hole, which can easily cause chipping and burrs, damaging the edge accuracy of the through hole.

[0004] The existing technology has the following problems: In existing planetary wheel-specific double-sided polishing devices, due to the inertia of the coolant, a large amount of coolant carries abrasive debris into the planetary wheel's through-hole. During continuous polishing of the planetary wheel, the coolant containing abrasive debris not only repeatedly rubs against the inner wall of the through-hole, causing the diameter of the through-hole to become larger and larger, but also continuously damages the through-hole under the influence of inertia, causing the through-hole to chip and burr, which in turn affects the accuracy of the planetary wheel. Summary of the Invention

[0005] This invention provides a dedicated double-sided polishing device and polishing method for planetary wheels to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A double-sided polishing device for planetary wheels includes a polishing body. An extension block is fixedly connected to the center of the bottom of the inner wall of the polishing body, and a support column is fixedly connected to the center of the top of the extension block. A support plate is fixedly connected to the center of the top of the support column. A support frame is fixedly connected to the top of the support plate. A connecting rod is rotatably connected through the center of the inner wall of the support frame. Support rings are fixedly connected to both ends of the outer wall of the connecting rod. A load-bearing frame is fixedly connected to the center of the outer wall of the connecting rod. Both ends of the outer wall of the load-bearing frame are fixedly connected to the inner wall of the support ring. A lower polishing disc is rotatably connected to the top of the support ring.

[0007] A further improvement of the technical solution of the present invention is that: a drive motor is fixedly connected to one end of the bottom of the support plate, and a drive rod is fixedly connected to the output end of the drive motor; a synchronous belt is drivenly connected to the outer wall of the drive rod, and the end of the synchronous belt is drivenly connected to the outer wall of the connecting rod.

[0008] A further improvement of the technical solution of the present invention is that: an electrically controlled rotating shaft base is fixedly connected to one end of the top of the extension block near the support column, and a load-bearing block is rotatably connected to the output end of the electrically controlled rotating shaft base; the inner wall of the load-bearing block is rotatably connected to the outer wall of the support column; both ends of the inner cavity of the load-bearing block are provided with sliding grooves, and arc-shaped load-bearing plates are slidably connected to the inner walls of the two sliding grooves; a transmission ring is fixedly connected to the ends of the two arc-shaped load-bearing plates; the inner wall of the transmission ring is rotatably connected to the outer wall of the support ring; a guide column is fixedly connected to one end of the outer wall of the transmission ring; and the top of the guide column is fixedly connected to one end of the bottom of the lower grinding disc.

[0009] A further improvement of the technical solution of the present invention is that: limit grooves are provided on both sides of the inner walls of the two slide grooves, and eccentric elastic wedge blocks are slidably connected to the inner walls of the two limit grooves, while the outer walls of the eccentric elastic wedge blocks are fixedly connected to the outer walls of the arc-shaped load-bearing plate.

[0010] A further improvement of the technical solution of the present invention is that: one end of the inner cavity of the extension block is fixedly connected to a liquid inlet pipe, and the end of the liquid inlet pipe is fixedly connected to a liquid pump; the outer wall of the liquid pump is fixedly connected to the inner cavity of the support column; and the output end of the liquid pump is fixedly connected to a telescopic hose.

[0011] A further improvement of the technical solution of the present invention is that: a column is fixedly connected to the center of the top of the support frame, and a liquid separator valve is fixedly connected to the inner wall of the column, and the input end of the liquid separator valve is fixedly connected to the end of the telescopic hose.

[0012] A further improvement of the technical solution of the present invention is that: an isolation tube is fixedly connected to the top end of the extension block away from the support column, and a sluice plate is fixedly connected to the top of the isolation tube and the polishing body.

[0013] A further improvement of the technical solution of the present invention is that: an electrically controlled rotary cap is rotatably connected to the end of the isolation tube near the polishing body, and a circulating filter is fixedly connected to the end of the isolation tube away from the polishing body.

[0014] A further improvement of the technical solution of the present invention is that: a gantry frame is fixedly connected to the top of the polishing body, and an electrically controlled telescopic rod is fixedly connected to the center of the inner wall of the gantry frame, and an electrically controlled rotating shaft is fixedly connected to the output end of the electrically controlled telescopic rod, a support plate is fixedly connected to the output end of the electrically controlled rotating shaft, and an upper grinding plate is fixedly connected to the bottom of the support plate.

[0015] A method for double-sided polishing of a planetary wheel, using the aforementioned double-sided polishing device for a planetary wheel, is as follows: S1: An extension block is set at the center of the bottom of the inner wall of the polishing body, and a support column is set at the center of the top of the extension block. A support plate is set at the center of the top of the support column, and a support frame is set on the top of the support plate for support. A connecting rod is set at the center of the inner wall of the support frame, and the support rings set at both ends of the outer wall of the connecting rod are used to support the lower grinding disc set on the top. The drive motor set at one end of the bottom of the support plate is started, so that the lower grinding disc is tilted through the drive rod, the synchronous belt, the connecting rod, the load-bearing frame and the support ring. S2: By setting an electrically controlled rotating shaft base at one end of the top of the extension block near the support column, the electrically controlled rotating shaft base drives the load-bearing block set at the output end to rotate. Since there are sliding grooves at both ends of the inner cavity of the load-bearing block, and the inner walls of the two sliding grooves are equipped with arc-shaped load-bearing plates, the transmission ring set at the end of the arc-shaped load-bearing plate drives the lower grinding disc to rotate through the guide column. S3: By installing a liquid pump inside the support column, starting the liquid pump, and using the liquid inlet pipe at its input end, the coolant is discharged through the telescopic hose at the output end of the liquid pump into the liquid distribution valve installed on the inner wall of the column. Through the liquid distribution valve, the coolant is evenly discharged into the gap between the upper and lower grinding discs and wets the surface of the planetary wheel.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows: This invention provides a dedicated double-sided polishing device and method for planetary wheels. A drive motor drives a transmission rod at its output end, causing a synchronous belt to rotate a connecting rod. This, in turn, causes a support ring to rotate around the connecting rod, resulting in a slight tilt of the support ring relative to the lower polishing disc at its top. During this process, the transmission ring on the outer wall of the support ring and the arc-shaped support plates at both ends of the bottom of the transmission ring synchronously shift within two grooves. This tilting of the lower polishing disc around the connecting rod, without affecting its normal rotation, allows the coolant in the through-hole to pass through. Freed from the constraints of the upper grinding disc, and with the continuous rotation of the lower grinding disc, the remaining coolant in the through-hole is flung out by inertia. This further solves the problem that in traditional planetary wheel-specific double-sided polishing devices, a large amount of coolant carrying grinding debris enters the planetary wheel through-hole due to inertia. During continuous polishing of the planetary wheel, the coolant containing grinding debris not only repeatedly rubs against the inner wall of the through-hole, causing the diameter of the through-hole to become larger and larger, but also continuously damages the through-hole under the influence of inertia, causing the through-hole to chip and burr, thus affecting the accuracy of the planetary wheel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the unfolded structure of the upper grinding disc of the present invention; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the support plate structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the load-bearing block of the present invention; Figure 6 This is a schematic cross-sectional view of the support frame structure of the present invention; Figure 7 This is a schematic diagram of the transmission ring structure of the present invention; Figure 8 This is a schematic diagram of the unfolded support ring structure of the present invention; Figure 9 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 10 For the present invention Figure 3 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Polishing body; 2. Extension block; 3. Support column; 4. Support plate; 5. Support frame; 6. Connecting rod; 7. Support ring; 8. Load-bearing frame; 9. Lower grinding disc; 10. Drive motor; 11. Drive rod; 12. Synchronous belt; 13. Electrically controlled rotating shaft base; 14. Load-bearing block; 15. Slide groove; 16. Arc-shaped load-bearing plate; 17. Drive ring; 18. Guide column; 19. Limiting groove; 20. Eccentric elastic wedge block; 21. Liquid inlet pipe; 22. Liquid pump; 23. Telescopic hose; 24. Column; 25. Liquid distribution valve; 26. Isolation tube; 27. Strain plate; 28. Electrically controlled capping; 29. ​​Circulating filter; 30. Gantry frame; 31. Electrically controlled telescopic rod; 32. Electrically controlled rotating shaft; 33. Support disc; 34. Upper grinding disc. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 10As shown in the embodiment of the present invention, a double-sided polishing device for a planetary wheel includes a polishing body 1. An extension block 2 is fixedly connected to the center of the bottom of the inner wall of the polishing body 1, and a support column 3 is fixedly connected to the center of the top of the extension block 2. A support plate 4 is fixedly connected to the center of the top of the support column 3. A support frame 5 is fixedly connected to the top of the support plate 4, and a connecting rod 6 is rotatably connected through the center of the inner wall of the support frame 5. Support rings 7 are fixedly connected to both ends of the outer wall of the connecting rod 6. A load-bearing frame 8 is fixedly connected to the center of the outer wall of the connecting rod 6, and both ends of the outer wall of the load-bearing frame 8 are fixedly connected to the inner wall of the support ring 7. A lower polishing disc 9 is rotatably connected to the top of the support ring 7. A transmission is fixedly connected to one end of the bottom of the support plate 4. A drive motor 10 is provided, and a transmission rod 11 is fixedly connected to the output end of the drive motor 10. A synchronous belt 12 is driven to the outer wall of the transmission rod 11, and the end of the synchronous belt 12 is driven to the outer wall of the connecting rod 6. An electrically controlled rotating shaft base 13 is fixedly connected to the top of the extension block 2 near the support column 3, and a load-bearing block 14 is rotatably connected to the output end of the electrically controlled rotating shaft base 13. The inner wall of the load-bearing block 14 is rotatably connected to the outer wall of the support column 3. Slide grooves 15 are provided at both ends of the inner cavity of the load-bearing block 14, and arc-shaped load-bearing plates 16 are slidably connected to the inner walls of the two slide grooves 15. A transmission ring 17 is fixedly connected to the ends of the two arc-shaped load-bearing plates 16. The inner wall of the transmission ring 17 is rotatably connected to the outer wall of the support ring 7. A guide post 18 is fixedly connected to one end of the outer wall, and the top of the guide post 18 is fixedly connected to one end of the bottom of the lower grinding disc 9. Limiting grooves 19 are opened on both sides of the inner walls of the two sliding grooves 15, and eccentric elastic wedge blocks 20 are slidably connected to the inner walls of the two limiting grooves 19. The outer wall of the eccentric elastic wedge block 20 is fixedly connected to the outer wall of the arc-shaped load-bearing plate 16. An inlet pipe 21 is fixedly connected to one end of the inner cavity of the extension block 2, and a liquid pump 22 is fixedly connected to the end of the inlet pipe 21. The outer wall of the liquid pump 22 is fixedly connected to the inner cavity of the support column 3, and a telescopic hose 23 is fixedly connected to the output end of the liquid pump 22. A column 24 is fixedly connected to the center of the top of the support frame 5, and a liquid distribution valve 25 is fixedly connected to the inner wall of the column 24. The input end of the dispensing valve 25 is fixedly connected to the end of the telescopic hose 23. An isolation tube 26 is fixedly connected to the top of the extension block 2 away from the support column 3. A strainer plate 27 is fixedly connected to the top of the isolation tube 26 and the polishing body 1. An electrically controlled cap 28 is rotatably connected to the end of the isolation tube 26 and the polishing body 1 near the strainer plate 27. A circulation filter 29 is fixedly connected to the end of the isolation tube 26 and the polishing body 1 away from the strainer plate 27. A gantry frame 30 is fixedly connected to the top of the polishing body 1. An electrically controlled telescopic rod 31 is fixedly connected to the center of the inner wall of the gantry frame 30. An electrically controlled rotating shaft 32 is fixedly connected to the output end of the electrically controlled telescopic rod 31. A support plate 33 is fixedly connected to the output end of the electrically controlled rotating shaft 32.Furthermore, the bottom of the support plate 33 is fixedly connected to the upper grinding plate 34.

[0021] During operation, an extension block 2 is set at the center of the bottom of the inner wall of the polishing body 1, and a support column 3 is set at the center of the top of the extension block 2. A support plate 4 is set at the center of the top of the support column 3, and a support frame 5 is set on the top of the support plate 4 for support. A connecting rod 6 is set at the center of the inner wall of the support frame 5, and a support ring 7 is set at both ends of the outer wall of the connecting rod 6 to support the lower grinding disc 9 set on top of it. When grinding the planetary wheel, the planetary wheel is placed on the surface of the lower grinding disc 9. A gantry frame 30 is set on the top of the polishing body 1, and an electrically controlled telescopic rod 31 is set at the center of the inner wall of the gantry frame 30. When the electrically controlled telescopic rod 31 is activated, it drives the electrically controlled rotating shaft 32 (which is composed of a motor and a rotating shaft, belonging to the prior art) set at the output end, the support plate 33, and the upper grinding disc 34 to move downward, and clamp the planetary wheel on the surface of the lower grinding disc 9. Then, the electrically controlled rotating shaft 32 is activated, causing it to drive the upper grinding disc 34 to rotate rapidly clockwise via the support disc 33. At the same time, the electrically controlled rotating shaft base 13 is set at one end of the top of the extension block 2 near the support column 3. The electrically controlled rotating shaft base 13 is activated, causing it to drive the load-bearing block 14 set at the output end to rotate. Since both ends of the inner cavity of the load-bearing block 14 are provided with sliding grooves 15, and the inner walls of the two sliding grooves 15 are provided with arc-shaped load-bearing plates 16, the two arc-shaped load-bearing plates 16 drive the transmission ring 17 set at its end to rotate slowly counterclockwise on the outer wall of the support ring 7. Since one end of the bottom of the lower grinding disc 9 is provided with a guide column 18, when the transmission ring 17 rotates, the guide column 18 drives the lower grinding disc 9 to rotate slowly counterclockwise. By using the bidirectional shearing grinding force applied to the planetary wheel by the lower grinding disc 9 and the upper grinding disc 34, uniform grinding of the upper and lower surfaces of the planetary wheel is achieved. It should be further explained that by setting an isolation tube 26 at the top of the extension block 2 away from the support column 3, coolant is poured into the gap between the polishing body 1 and the isolation tube 26 (at this time, the electrically controlled cap 28 is in the open state, and the circulation filter 29 is closed, allowing the coolant to flow directly through the circulation filter 29 into the bottom of the inner wall of the polishing body 1). Since the inner cavity of the support column 3 is equipped with a liquid pump 22, and the inlet pipe 21 of the input end of the liquid pump 22 is located in the inner cavity of the extension block 2, the liquid pump 22 is started, and the coolant is sent into the liquid pump 22 through the inlet pipe 21. By setting a column 24 at the center of the top of the support frame 5, and setting a liquid distribution valve 25 on the inner wall of the column 24, the liquid pump 22 sends the coolant from its output end through a telescopic hose 23 into the liquid distribution valve 25, and the liquid distribution valve 25 evenly discharges the coolant into the gap between the upper polishing disc 34 and the lower polishing disc 9. Under the influence of the inertia generated by the rotation, the coolant is allowed to permeate along the gap. The surface of the planetary wheel is cooled, and the grinding debris generated during grinding is removed. The coolant containing the grinding debris is then thrown into the gap between the polishing body 1 and the isolation tube 26 by inertia after passing through the planetary wheel. A sluice plate 27 is set at the top between the polishing body 1 and the isolation tube 26, and an electrically controlled cap 28 (composed of a motor and a cap, which is existing technology) is set at the end of the polishing body 1 and the isolation tube 26 near the sluice plate 27. When the electrically controlled cap 28 is activated, the coolant containing the grinding debris passes through the sluice plate 27 and the electrically controlled cap 28 and enters the circulation filter 29 (a device specifically for filtering coolant containing grinding debris, which is existing technology) set at the end of the polishing body 1 and the isolation tube 26 away from the sluice plate 27. The circulation filter 29 filters the coolant, and the coolant after filtering the grinding debris flows into the polishing body 1 and is drawn back by the inlet pipe 21 for recycling. It should be further explained that by setting a drive motor 10 at one end of the bottom of the support plate 4, and setting a drive rod 11 at the output end of the drive motor 10, and setting a synchronous belt 12 (here, the synchronous belt 12 is composed of a synchronous pulley and a toothed belt, which is the prior art) on the outer wall of the drive rod 11, since the planetary wheel surface is provided with several mutually symmetrical through holes, when the coolant wets the planetary wheel surface, some of the coolant enters the through holes. Under the influence of the capillary siphon effect, the coolant in the through holes cannot be discharged under the action of inertia. At this time, the electrically controlled rotating shaft 32 is closed, and the support plate 33 and the upper grinding plate 34 stop rotating. At the same time, the electrically controlled telescopic rod 31 is activated, so that it passes through the electrically controlled rotating shaft 32. Shaft 32 and support plate 33 pull the upper grinding plate 34 away from the planetary wheel on the surface of the lower grinding plate 9. During this period, the rotation speed of the lower grinding plate 9 is reduced. Then, the drive motor 10 is started, which drives the connecting rod 6 to rotate through the transmission rod 11 at the output end and the synchronous belt 12. Since the center of the outer wall of the connecting rod 6 is provided with a load-bearing frame 8, and the two ends of the outer wall of the load-bearing frame 8 are connected to the inner wall of the support ring 7, when the connecting rod 6 rotates, the load-bearing frame 8 drives the support ring 7 to rotate around the connecting rod 6 as the center. This causes the support ring 7 to tilt slightly with respect to the lower grinding plate 9 at its top. During this period, the transmission ring 17 on the outer wall of the support ring 7 and the bottom of the transmission ring 17... The arc-shaped load-bearing plates 16 at both ends are synchronously offset within the two sliding grooves 15. While not affecting the normal rotation of the lower grinding disc 9, this causes the lower grinding disc 9 to tilt around the connecting rod 6 as its center. At this time, the coolant in the through hole is no longer restrained by the upper grinding disc 34, and under the continuous rotation of the lower grinding disc 9, the remaining coolant in the through hole is thrown out by inertia. When there is no obvious coolant in the through hole, the drive motor 10 is restarted, repeating the operation of the synchronous belt 12 driving the support ring 7 and the lower grinding disc 9 to rotate through the connecting rod 6 and the load-bearing frame 8, thus resetting the lower grinding disc 9 and keeping it parallel to the upper grinding disc 34. Then, the electrically controlled telescopic rod 31 is restarted, causing the upper grinding disc 9 to... While the grinding disc 34 is in contact with the surface of the planetary wheel, the electrically controlled rotating shaft 32 is activated, causing the upper grinding disc 34 to continue to rotate rapidly clockwise. During the planetary wheel polishing process, the above-mentioned through-hole drainage operation is repeated three to four times. This further solves the problem that in the traditional planetary wheel dedicated double-sided polishing device, due to the influence of inertia, a large amount of coolant will carry abrasive particles into the planetary wheel through-hole. When the planetary wheel is continuously polished, the coolant containing abrasive particles will not only repeatedly rub against the inner wall of the through-hole, causing the diameter of the through-hole to become larger and larger, but also continuously damage the through-hole under the influence of inertia, causing the through-hole to chip and burr, which in turn affects the accuracy of the planetary wheel. It needs to be reiterated that by setting an eccentric elastic wedge block 20 at one end of the two arc-shaped load-bearing plates 16 away from the transmission ring 17 (here, the eccentric elastic wedge block 20 is composed of two mutually symmetrical elastic wedge-shaped eccentric blocks, a spring, and an arc-shaped pressure block, and one end of the outer wall of the arc-shaped pressure block is tightly fitted with the inner wall of the limiting groove 19, which is existing technology), since both sides of the inner wall of the slide groove 15 are provided with limiting grooves 19, and the inner wall of the limiting groove 19 presents a continuously inclined arc-shaped curved surface, when the grinding disc 9 tilts with the connecting rod 6 as the center, the eccentric elastic wedge block 20 at one end will be able to withstand the pressure. The wedge block 20 moves upward along the limiting groove 19, while the eccentric elastic wedge block 20 at the other end moves downward along the limiting groove 19. The upward-moving eccentric elastic wedge block 20 is forced to release the arc-shaped pressure block and allows the arc-shaped pressure block to move normally along the limiting groove 19. The downward-moving eccentric elastic wedge block 20 is forced to compress and causes the elastic wedge-shaped eccentric blocks at both ends to lock the spring and the arc-shaped pressure block, thus locking the contact surface between the arc-shaped pressure block and the limiting groove 19 (similar to a spring-loaded button, which is existing technology), thereby achieving the purpose of fixing the arc-shaped load-bearing plate 16.

[0022] A method for double-sided polishing of a planetary wheel, using the aforementioned double-sided polishing device for a planetary wheel, is as follows: S1: An extension block 2 is set at the center of the bottom of the inner wall of the polishing body 1, and a support column 3 is set at the center of the top of the extension block 2. A support plate 4 is set at the center of the top of the support column 3, and a support frame 5 is set on the top of the support plate 4 for support. A connecting rod 6 is set at the center of the inner wall of the support frame 5, and a support ring 7 is set at both ends of the outer wall of the connecting rod 6 for support. The lower grinding disc 9 set on the top is supported. The drive motor 10 set at one end of the bottom of the support plate 4 is started, so that the lower grinding disc 9 is tilted through the drive rod 11, the synchronous belt 12, the connecting rod 6, the load-bearing frame 8 and the support ring 7. S2: By setting an electrically controlled rotating shaft base 13 at one end of the top of the extension block 2 near the support column 3, the electrically controlled rotating shaft base 13 drives the load-bearing block 14 set at the output end to rotate. Since the two ends of the inner cavity of the load-bearing block 14 are provided with sliding grooves 15, and the inner walls of the two sliding grooves 15 are provided with arc-shaped load-bearing plates 16, the transmission ring 17 set at the end of the arc-shaped load-bearing plate 16 drives the lower grinding disc 9 to rotate through the guide column 18. S3: By installing a liquid pump 22 in the inner cavity of the support column 3, the liquid pump 22 is started. Using the liquid inlet pipe 21 installed at its input end, the coolant is discharged through the telescopic hose 23 installed at the output end of the liquid pump 22 into the liquid distribution valve 25 installed on the inner wall of the column 24. Through the liquid distribution valve 25, the coolant is evenly discharged into the gap between the upper grinding disc 34 and the lower grinding disc 9 and wets the surface of the planetary wheel.

[0023] The working principle of this special double-sided polishing device and polishing method for planetary wheels will be explained in detail below.

[0024] like Figures 1 to 10As shown, an extension block 2 is set at the center of the bottom of the inner wall of the polishing body 1, and a support column 3 is set at the center of the top of the extension block 2. A support plate 4 is set at the center of the top of the support column 3, and a support frame 5 is set on the top of the support plate 4 for support. A connecting rod 6 is set at the center of the inner wall of the support frame 5, and a support ring 7 is set at both ends of the outer wall of the connecting rod 6 to support the lower grinding disc 9 set on its top. When polishing the planetary wheel, the planetary wheel is placed on the surface of the lower grinding disc 9. A gantry frame 30 is set on the top of the polishing body 1, and an electrically controlled telescopic rod 31 is set at the center of the inner wall of the gantry frame 30. When the electrically controlled telescopic rod 31 is activated, it drives the electrically controlled rotating shaft 32, the support plate 33, and the upper grinding disc 3 at the output end. 4. Move downwards and clamp the planetary wheel on the surface of the lower grinding disc 9. Then, start the electrically controlled rotating shaft 32, which drives the upper grinding disc 34 to rotate rapidly clockwise via the support disc 33. At the same time, by setting the electrically controlled rotating shaft base 13 at one end of the top of the extension block 2 near the support column 3, start the electrically controlled rotating shaft base 13, which drives the load-bearing block 14 set at the output end to rotate. Since both ends of the inner cavity of the load-bearing block 14 are provided with sliding grooves 15, and the inner walls of the two sliding grooves 15 are provided with arc-shaped load-bearing plates 16, the two arc-shaped load-bearing plates 16 drive the transmission ring 17 set at its end to rotate slowly counterclockwise on the outer wall of the support ring 7. Since one end of the bottom of the lower grinding disc 9 is provided with a guide column 18, when the transmission ring 17 rotates... At this time, the guide column 18 drives the lower grinding disc 9 to rotate slowly counterclockwise. By using the bidirectional shearing grinding force applied to the planetary wheel by the lower grinding disc 9 and the upper grinding disc 34, uniform grinding of the upper and lower surfaces of the planetary wheel is achieved. A drive motor 10 is set at one end of the bottom of the support plate 4, and a drive rod 11 is set at the output end of the drive motor 10. A synchronous belt 12 is set on the outer wall of the drive rod 11. Since there are several symmetrical through holes on the surface of the planetary wheel, when the coolant wets the surface of the planetary wheel, some of the coolant enters the through holes. Under the influence of capillary siphon effect, the coolant in the through holes cannot be discharged under the action of inertia. At this time, the electric control shaft 32 is closed, and the support disc 33 and the upper grinding disc 34 stop rotating. At the same time, the electric control extension is started. The retracting rod 31, via the electrically controlled rotating shaft 32 and the support plate 33, pulls the upper grinding disc 34 away from the planetary wheel on the surface of the lower grinding disc 9. During this process, the rotational speed of the lower grinding disc 9 is reduced. Then, the drive motor 10 is started, which drives the connecting rod 6 to rotate via the synchronous belt 12 through the transmission rod 11 at the output end. Since the center of the outer wall of the connecting rod 6 is provided with a load-bearing frame 8, and the two ends of the outer wall of the load-bearing frame 8 are connected to the inner wall of the support ring 7, when the connecting rod 6 rotates, the load-bearing frame 8 rotates around the connecting rod 6 as the center, causing the support ring 7 to rotate and the support ring 7 to tilt slightly with respect to the lower grinding disc 9 at its top. During this process, the transmission ring 17 on the outer wall of the support ring 7 and the arc-shaped load-bearing plates 16 at both ends of the bottom of the transmission ring 17 are also affected.The two slides 15 are synchronously offset, and without affecting the normal rotation of the lower grinding disc 9, the lower grinding disc 9 is tilted around the connecting rod 6 as the center. At this time, the coolant in the through hole is no longer restrained by the upper grinding disc 34, and under the continuous rotation of the lower grinding disc 9, the remaining coolant in the through hole is thrown out by inertia. When there is no obvious coolant in the through hole, the drive motor 10 is started again, and the above operation of the synchronous belt 12 driving the support ring 7 and the lower grinding disc 9 to rotate through the connecting rod 6 and the load-bearing frame 8 is repeated, so that the lower grinding disc 9 is reset and kept parallel to the upper grinding disc 34. Then the electric telescopic rod 31 is started again, so that the upper grinding disc 34 and the sliding rod 34 are parallel to the upper grinding disc 34. While the star wheel surface is in contact with the polishing wheel, the electrically controlled rotating shaft 32 is activated, causing the upper polishing disc 34 to continue rotating rapidly clockwise. During the polishing process of the star wheel, the above-mentioned through-hole drainage operation is repeated three to four times. This further solves the problem that in traditional star wheel-specific double-sided polishing devices, due to the inertia of the coolant, a large amount of coolant carrying abrasive particles enters the through-hole of the star wheel. During continuous polishing of the star wheel, the coolant containing abrasive particles not only repeatedly rubs against the inner wall of the through-hole, causing the through-hole diameter to increase, but also continuously damages the through-hole under the influence of inertia, leading to chipping and burrs, thus affecting the precision of the star wheel.

[0025] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A double-sided polishing device for planetary wheels, comprising a polishing body (1), characterized in that: An extension block (2) is fixedly connected to the center of the bottom of the inner wall of the polishing body (1), and a support column (3) is fixedly connected to the center of the top of the extension block (2). A support plate (4) is fixedly connected to the center of the top of the support column (3). A support frame (5) is fixedly connected to the top of the support plate (4). A connecting rod (6) is rotatably connected through the center of the inner wall of the support frame (5). Support rings (7) are fixedly connected to both ends of the outer wall of the connecting rod (6). A load-bearing frame (8) is fixedly connected to the center of the outer wall of the connecting rod (6). Both ends of the outer wall of the load-bearing frame (8) are fixedly connected to the inner wall of the support ring (7). A lower grinding disc (9) is rotatably connected to the top of the support ring (7).

2. The double-sided polishing device for a planetary wheel according to claim 1, characterized in that: One end of the bottom of the support plate (4) is fixedly connected to a drive motor (10), and the output end of the drive motor (10) is fixedly connected to a drive rod (11). The outer wall of the drive rod (11) is connected to a synchronous belt (12), and the end of the synchronous belt (12) is connected to the outer wall of the connecting rod (6).

3. The double-sided polishing device for a planetary wheel according to claim 1, characterized in that: The top of the extension block (2) is fixedly connected to an electric control rotating shaft base (13) near the support column (3), and the output end of the electric control rotating shaft base (13) is rotatably connected to a load-bearing block (14). The inner wall of the load-bearing block (14) is rotatably connected to the outer wall of the support column (3). Both ends of the inner cavity of the load-bearing block (14) are provided with sliding grooves (15), and the inner walls of the two sliding grooves (15) are slidably connected to arc-shaped load-bearing plates (16). The ends of the two arc-shaped load-bearing plates (16) are fixedly connected to a transmission ring (17). The inner wall of the transmission ring (17) is rotatably connected to the outer wall of the support ring (7), and one end of the outer wall of the transmission ring (17) is fixedly connected to a guide column (18). The top of the guide column (18) is fixedly connected to one end of the bottom of the lower grinding disc (9).

4. The double-sided polishing device for a planetary wheel according to claim 3, characterized in that: Limiting grooves (19) are provided on both sides of the inner wall of the two sliding grooves (15), and eccentric elastic wedge blocks (20) are slidably connected to the inner wall of the two limiting grooves (19), while the outer wall of the eccentric elastic wedge blocks (20) is fixedly connected to the outer wall of the arc-shaped load-bearing plate (16).

5. The double-sided polishing device for a planetary wheel according to claim 1, characterized in that: One end of the inner cavity of the extension block (2) is fixedly connected to an inlet pipe (21), and the end of the inlet pipe (21) is fixedly connected to a pump (22). The outer wall of the pump (22) is fixedly connected to the inner cavity of the support column (3), and the output end of the pump (22) is fixedly connected to a telescopic hose (23).

6. The double-sided polishing device for a planetary wheel according to claim 1, characterized in that: A column (24) is fixedly connected to the center of the top of the support frame (5), and a liquid separator (25) is fixedly connected to the inner wall of the column (24), while the input end of the liquid separator (25) is fixedly connected to the end of the telescopic hose (23).

7. The double-sided polishing device for a planetary wheel according to claim 1, characterized in that: An isolation tube (26) is fixedly connected to the top of the extension block (2) away from the support column (3), and a squeegee (27) is fixedly connected to the top of the isolation tube (26) and the polishing body (1).

8. The double-sided polishing device for a planetary wheel according to claim 7, characterized in that: An electrically controlled cap (28) is rotatably connected to one end of the isolation tube (26) and the polishing body (1) near the sprue plate (27), and a circulating filter (29) is fixedly connected to one end of the isolation tube (26) and the polishing body (1) away from the sprue plate (27).

9. The double-sided polishing device for a planetary wheel according to claim 1, characterized in that: The top of the polishing body (1) is fixedly connected to a gantry frame (30), and an electric telescopic rod (31) is fixedly connected to the center of the inner wall of the gantry frame (30). The output end of the electric telescopic rod (31) is fixedly connected to an electric rotating shaft (32), and the output end of the electric rotating shaft (32) is fixedly connected to a support plate (33). The bottom of the support plate (33) is fixedly connected to an upper polishing plate (34).

10. A method for double-sided polishing of a planetary wheel, the method employing the double-sided polishing apparatus for a planetary wheel as described in any one of claims 1-9, characterized in that: The method is as follows: S1: By setting an extension block (2) at the center of the bottom of the inner wall of the polishing body (1) and a support column (3) at the center of the top of the extension block (2), a support plate (4) is set at the center of the top of the support column (3), and a support frame (5) is set on the top of the support plate (4) for support. A connecting rod (6) is set at the center of the inner wall of the support frame (5), and a support ring (7) is set at both ends of the outer wall of the connecting rod (6) for support. The lower grinding disc (9) set on its top is supported. The drive motor (10) set at one end of the bottom of the support plate (4) is started, so that the lower grinding disc (9) is tilted through the drive rod (11), the synchronous belt (12), the connecting rod (6), the load-bearing frame (8) and the support ring (7). S2: By setting an electric control shaft base (13) at one end of the extension block (2) near the support column (3), the electric control shaft base (13) drives the load block (14) set at the output end to rotate. Since the load block (14) has a sliding groove (15) at both ends of the inner cavity, and the inner walls of the two sliding grooves (15) are provided with arc-shaped load plates (16), the transmission ring (17) set at the end of the arc-shaped load plate (16) drives the lower grinding disc (9) to rotate through the guide column (18). S3: By setting a liquid pump (22) in the inner cavity of the support column (3), start the liquid pump (22), and use the liquid inlet pipe (21) set at its input end to discharge the coolant through the telescopic hose (23) set at the output end of the liquid pump (22) into the liquid distribution valve (25) set on the inner wall of the column (24), and through the liquid distribution valve (25), the coolant is evenly discharged into the gap between the upper grinding plate (34) and the lower grinding plate (9) and wets the surface of the planetary wheel.

Images