A kind of rotating polishing equipment for automobile clutch brake disc

Abstract

The present invention relates to the technical field of processing machinery, and discloses a rotating polishing device for automobile clutch brake disc, comprising a support cylinder, a support disc is fixed on the upper end of the support cylinder, a servo motor is arranged inside the support cylinder, and two layers of grinding discs for grinding are arranged on the upper end of the support disc; a clamping assembly for clamping is arranged on the outer sides of the two layers of the grinding discs; a water storage layer for generating water discharge when subjected to force is arranged at the lower end of the support disc, and a water outlet part for discharging water is arranged between the two layers of the grinding discs, the water outlet part is connected to the water storage layer, and the water outlet part can control the water discharge amount when squeezed. The present invention sets a first and a second stripe mouth, and the brake disc is clamped between the upper and lower rolling balls, so that the brake disc can move up and down within a certain range, and the water enters the water outlet part upward through the guide branch pipe. By setting the positions of the first and the second stripe mouths, the water moves outward along the upper and lower sides of the brake disc, and can flush out the impurities generated by grinding, thereby preventing the impurities from affecting the grinding.

Description

Technical Field

[0001] The invention relates to the technical field of processing machinery, in particular to a rotating polishing device for a clutch brake disc of an automobile. Background Art

[0002] The brake disc, in simple terms, is a round plate that rotates when the car is moving. The brake caliper clamps the brake disc to generate braking force, and when you step on the brake, it clamps the brake disc to slow down or stop the car.

[0003] During the processing of the brake disc, its surface needs to be polished. During the polishing process, both surfaces need to be polished. In the patent with patent number 202011367502.X, a rotating polishing device for automobile clutch brake disc is proposed, which performs grinding and deburring simultaneously, simplifies the working steps, and improves production efficiency. The air blower blows air to the surface of the brake disc to avoid overheating and reduce stress deformation.

[0004] The above patent adopts air cooling technology, but dust is generated during the grinding process, so water cooling is used in many cases. However, impurities produced by grinding are mixed with water and squeezed between the grinding disc and the parts, which reduces the grinding effect. It is necessary to flush out the turbid water produced by grinding to facilitate better grinding. For this reason, a rotating polishing device for automobile clutch brake disc is proposed. Summary of the invention

[0005] The object of the present invention is to provide a kind of automobile clutch brake disc rotary polishing equipment, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a rotating polishing device for a clutch brake disc of an automobile, comprising a support cylinder, a support disc is fixed on the upper end of the support cylinder, a servo motor is arranged inside the support cylinder, and a two-layer grinding disc for grinding is arranged on the upper end of the support disc;

[0007] The outer sides of the two layers of grinding discs are provided with clamping components for clamping;

[0008] The lower end of the support plate is provided with a water storage layer that produces water when subjected to force, and a water outlet member for discharging water is provided between the two layers of the grinding plates. The water outlet member is connected to the water storage layer, and the water outlet member can control the water output when squeezed.

[0009] Preferably, a bracket is fixed to the lower end of the support plate, the lower end of the bracket is fixedly connected to the servo motor, the water storage layer is fixed to the upper end of the bracket, the output end of the servo motor is fixedly connected to a rotating shaft, the rotating shaft passes through the water storage layer and the support plate upward in sequence, and the upper end of the rotating shaft is fixedly connected to the lower end of the grinding plate of the lower layer.

[0010] Preferably, a bladder layer is provided inside the aquifer, and the upper and lower sides of the bladder layer are fixedly connected to the upper and lower inner walls of the aquifer respectively, the bladder layer is ring-shaped, and the space between the outer side of the bladder layer and the aquifer is used for storing water. The bladder layer expands inwards under the squeeze of the stored water, and a water pipe for water to enter is fixedly connected to the outer side of the aquifer;

[0011] The inner side of the capsule layer is provided with a metal shaft which is used to squeeze the capsule layer outwards by the centrifugal force of the rotating shaft. The metal shaft is cylindrical to avoid the capsule layer from being squeezed and damaged during rotation. At the same time, the water pressure of the capsule layer is increased under the action of the centrifugal force.

[0012] The upper end of the water storage layer is connected to a guide branch pipe for squeezing water upwards. The guide branch pipe is connected to the space between the two layers of the grinding discs. A guide cavity is opened at the upper end of the water storage layer. The guide branch pipe is embedded in the guide cavity to protect the guide branch pipe.

[0013] Preferably, a telescopic shaft is fixedly connected to the inner side of the metal round shaft, the telescopic shaft is fixedly connected to the rotating shaft, the telescopic shaft has a telescopic effect, and a restoring spring is provided inside the telescopic shaft, so that the metal round shaft can be restored without rotating.

[0014] Preferably, an inner layer is fixed on the grinding disc at the lower end, and the grinding disc sleeve at the upper end is arranged on the inner layer. The two layers of grinding discs rotate in the same way. The inner side of the inner layer has a thread. A limit sleeve is provided on the grinding disc at the upper end. The limit sleeve is connected to the inner layer thread, and its outer side squeezes the grinding disc at the upper end, and the brake disc is clamped between the two layers of grinding discs.

[0015] Preferably, a guide plate is fixedly mounted on the upper end of the branch plate, the interior of the guide plate is hollow and annular, the rotating shaft passes through the guide plate upward, an annular opening is provided at the upper end of the guide plate, the upper end of the guide plate is squeezed with the grinding plate at the lower end, and the two are sealed, the interior of the guide plate is connected to the guide branch pipe, and an annular opening is provided on the guide plate so that the water outlet part at the upper end can ensure that water is squeezed outward.

[0016] Preferably, the water outlet member comprises a second columnar sleeve fixed on the lower end grinding disc, the interior of the second columnar sleeve is connected to the annular opening, the outer surface of the second columnar sleeve is provided with a first columnar sleeve, the upper end of the first columnar sleeve is closed and fixed to the upper end grinding disc;

[0017] The outer side of the second columnar sleeve is provided with a first strip opening, and the outer side of the first columnar sleeve is provided with a second strip opening. The outer sides of the first strip opening and the second strip opening are respectively flush with the opposite surfaces of the upper and lower grinding discs, so that the water squeezed outward can move out along the grinding discs;

[0018] The overlapping portion of the columnar sleeve 2 and the columnar sleeve 1 is provided with a rectangular opening, and the rectangular opening is used to prevent the columnar sleeve 2 and the columnar sleeve 1 from completely overlapping and making it difficult to discharge water. The columnar sleeve 2 and the columnar sleeve 1 squeeze the overlapping opening, so that the rectangular opening overlaps with the strip opening 1 and the strip opening 2 respectively;

[0019] The outer sides of the columnar sleeve 2 and the columnar sleeve 1 are provided with a reset spring for reset.

[0020] Preferably, both the upper and lower grinding discs are provided with clamping members, and the clamping members include a cylinder fixed to the outside of the grinding disc, a supporting spring is fixed inside the cylinder, a sleeve is fixed at the lower end of the supporting spring, a rotatable ball is embedded inside the sleeve, the ball extends downward under the action of the supporting spring, and the balls of the upper and lower groups of clamping members are abutted against each other, so that the brake disc will not contact the upper and lower grinding discs when the rotating shaft just starts to rotate.

[0021] Preferably, the clamping assembly includes a support column fixed on the support plate, a ring is sleeved on the outer side of the support column, a threaded rod is transversely provided outside the ring, the threaded rod passes through the ring and the two are threadedly connected, and a pressure plate for extrusion is fixed to the end of the threaded rod.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention provides the first and second strips, and the brake disc is clamped between the upper and lower balls, so that the brake disc can move up and down within a certain range. Water enters the water outlet part upward through the guide branch pipe. By setting the positions of the first and second strips, water moves outward along the upper and lower sides of the brake disc, and impurities generated by grinding can be flushed out to prevent the impurities from affecting the grinding.

[0024] (2) The present invention arranges the brake disc to move in the up and down directions, presses or lifts the threaded rod, and realizes that the brake disc can contact the grinding disc. After the movement, water can also move out from the upper and lower sides of the brake disc, thereby achieving a cooling effect and taking out impurities.

[0025] (3) The present invention sets the water flow velocity and pressure at the beginning to be fast and high. When the shaft rotates, the water pressure inside the aquifer is high. The water in the aquifer can be quickly squeezed out from the first and second strips, and the impurities generated by the previous brake disc are cleaned out to avoid affecting the next grinding.

[0026] (4) The present invention sets a rectangular opening to overlap with the first and second strip openings respectively, and presses the upper grinding disc downward. The rectangular opening overlaps with the first and second strip openings respectively, and the upper and lower grinding discs are in contact with the brake disc. Water can also be pressed out from between the grinding disc and the brake disc, which speeds up grinding and prevents temperature increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the support tube of the present invention;

[0029] Figure 3 This is a schematic diagram of the aquifer structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the internal structure of the aquifer of the present invention;

[0031] Figure 5 This is a schematic diagram of a half-section structure of a grinding disc of the present invention;

[0032] Figure 6 For the present invention Figure 5 A is a schematic diagram of the partially enlarged structure of the middle part;

[0033] Figure 7 This is a schematic diagram of the water outlet structure of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the clamping member of the present invention.

[0035] In the figure: 1. support cylinder; 2. support plate; 3. grinding plate; 31. inner layer; 32. water outlet; 321. columnar sleeve 1; 322. columnar sleeve 2; 323. strip mouth 1; 324. strip mouth 2; 325. rectangular mouth; 326. reset spring; 33. clamping member; 331. cylinder; 332. support spring; 333. sleeve layer; 334. ball; 4. limit sleeve; 5. clamping assembly; 51. support column; 52. collar; 53. threaded rod; 54. pressure plate; 6. servo motor; 61. rotating shaft; 7. bracket; 8. aquifer; 81. guide branch pipe; 82. guide cavity; 83. capsule layer; 84. metal round shaft; 85. telescopic shaft; 86. water pipe; 87. guide plate; 88. annular mouth. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-8 The present invention provides a technical solution: a rotating polishing device for a clutch brake disc of an automobile, comprising a support cylinder 1, a support disc 2 is fixed on the upper end of the support cylinder 1, a servo motor 6 is arranged inside the support cylinder 1, and a two-layer grinding disc 3 for grinding is arranged on the upper end of the support disc 2;

[0038] A clamping assembly 5 for clamping is provided on the outer side of the two-layer grinding disc 3;

[0039] The lower end of the support plate 2 is provided with a water storage layer 8 that produces water when subjected to force. A water outlet member 32 for discharging water is provided between the two grinding plates 3. The water outlet member 32 is connected to the water storage layer 8. The water outlet member 32 can control the water output when squeezed.

[0040] A bracket 7 is fixed to the lower end of the support plate 2, and the lower end of the bracket 7 is fixedly connected to the servo motor 6. The water storage layer 8 is fixed to the upper end of the bracket 7. The output end of the servo motor 6 is fixedly connected to a rotating shaft 61. The rotating shaft 61 passes through the water storage layer 8 and the support plate 2 upward in sequence, and the upper end of the rotating shaft 61 is fixedly connected to the lower end of the grinding plate 3 of the lower layer.

[0041] A bladder layer 83 is provided inside the water storage layer 8. The upper and lower sides of the bladder layer 83 are fixedly connected to the upper and lower inner walls of the water storage layer 8 respectively. The bladder layer 83 is ring-shaped. The space between the outer side of the bladder layer 83 and the water storage layer 8 is used to store water. The bladder layer 83 expands inwards due to the squeezing of the stored water. A water pipe 86 for water to enter is fixedly connected to the outer side of the water storage layer 8.

[0042] A metal shaft 84 is provided on the inner side of the capsule layer 83 to squeeze the capsule layer 83 outwards by the centrifugal force of the rotating shaft 61. The metal shaft 84 is cylindrical to avoid squeezing and damaging the capsule layer 83 during rotation. At the same time, the water pressure of the capsule layer 83 is increased under the action of the centrifugal force.

[0043] The rotating shaft 61 rotates, and the water pressure inside the water storage layer 8 is large. The water in the water storage layer 8 can be quickly squeezed out from the first strip opening 323 and the second strip opening 324, and the impurities generated by the previous brake disc are cleaned out to avoid affecting the next grinding.

[0044] The upper end of the water storage layer 8 is connected to a guide branch pipe 81 for squeezing water upwards. The guide branch pipe 81 is connected to the space between the two layers of grinding discs 3. A guide cavity 82 is opened at the upper end of the water storage layer 8. The guide branch pipe 81 is embedded in the guide cavity 82 to protect the guide branch pipe 81.

[0045] A telescopic shaft 85 is fixedly connected to the inner side of the metal round shaft 84 . The telescopic shaft 85 is fixedly connected to the rotating shaft 61 . The telescopic shaft 85 has a telescopic function, and a restoring spring is provided inside the telescopic shaft 85 . The metal round shaft 84 can be restored when not rotating.

[0046] An inner layer 31 is fixed on the grinding disc 3 at the lower end, and the grinding disc 3 at the upper end is sleeved on the inner layer 31. The two layers of grinding discs 3 rotate in the same manner. The inner side of the inner layer 31 has a thread. A limit sleeve 4 is provided on the upper end grinding disc 3. The limit sleeve 4 is threadedly connected to the inner layer 31, and its outer side squeezes the upper end grinding disc 3. The brake disc is clamped between the two layers of grinding discs 3.

[0047] A guide plate 87 is fixedly installed on the upper end of the support plate 2. The interior of the guide plate 87 is hollow and annular. The rotating shaft 61 passes through the guide plate 87 upward. An annular opening 88 is provided at the upper end of the guide plate 87. The upper end of the guide plate 87 is squeezed with the grinding plate 3 at the lower end, and the two are in a sealed state. The interior of the guide plate 87 is connected with the guide branch pipe 81. An annular opening 88 is provided on the guide plate 87 so that the water outlet part 32 at the upper end can ensure that water is squeezed outward.

[0048] The water outlet 32 ​​includes a second columnar sleeve 322 fixed on the lower end grinding disc 3, the interior of the second columnar sleeve 322 is connected to the annular opening 88, and a first columnar sleeve 321 is disposed outside the second columnar sleeve 322, and the upper end of the first columnar sleeve 321 is closed and fixed to the upper end grinding disc 3;

[0049] The outer side of the second columnar sleeve 322 is provided with a first strip opening 323, and the outer side of the first columnar sleeve 321 is provided with a second strip opening 324. The outer sides of the first strip opening 323 and the second strip opening 324 are respectively flush with the opposite surfaces of the upper and lower grinding discs 3, so that the water squeezed outward can move along the grinding discs 3.

[0050] The brake disc is clamped between the upper and lower rolling balls 334, so that the brake disc can move up and down within a certain range. Water passes upward through the guide branch pipe 81 and enters the water outlet 32. By setting the positions of the first strip 323 and the second strip 324, the water moves outward along the upper and lower sides of the brake disc, and the impurities generated by grinding can be flushed out to avoid the impurities affecting the grinding.

[0051] A rectangular opening 325 is provided at the overlapped portion of the second column sleeve 322 and the first column sleeve 321. The rectangular opening 325 is used to prevent the second column sleeve 322 and the first column sleeve 321 from being completely overlapped and difficult to discharge water. The second column sleeve 322 and the first column sleeve 321 squeeze the overlapped opening, so that the rectangular opening 325 overlaps with the first strip opening 323 and the second strip opening 324 respectively.

[0052] The outer sides of the second columnar sleeve 322 and the first columnar sleeve 321 are provided with a return spring 326 for returning to the original position.

[0053] The upper and lower grinding discs 3 are both provided with clamping members 33, and the clamping members 33 include a cylinder 331 fixed to the outer side of the grinding disc 3, a supporting spring 332 is fixed inside the cylinder 331, a sleeve 333 is fixed at the lower end of the supporting spring 332, and a rotatable ball 334 is embedded inside the sleeve 333. The ball 334 extends downward under the action of the supporting spring 332, and the balls 334 of the upper and lower groups of clamping members 33 abut against each other, so that the brake disc will not contact the upper and lower grinding discs 3 when the rotating shaft 61 starts to rotate.

[0054] The clamping assembly 5 includes a support column 51 fixed on the support plate 2. A collar 52 is sleeved on the outer side of the support column 51. A threaded rod 53 is transversely arranged outside the collar 52. The threaded rod 53 penetrates the collar 52 and the two are threadedly connected. A pressing plate 54 for extrusion is fixed at the end of the threaded rod 53.

[0055] When in use, the limiting sleeve 4 is rotated to open, the upper grinding disc 3 is taken out upward, and then the brake disc is placed on the lower grinding disc 3, and the outer threaded rod 53 is rotated at the same time to realize the squeezing of the brake disc by the pressure plate 54, and then the upper grinding disc 3 is installed, and the limiting sleeve 4 is screwed down. Since the brake disc is clamped between the upper and lower rolling balls 334, the brake disc can move up and down within a certain range, and the collar 52 can move up and down, and the brake disc can move up and down within a certain range, and water is passed into the water storage layer 8 through the water pipe 86, and then in the process of passing water, the water props up the capsule layer 83 inwardly, and also allows water to enter the water outlet part 32 upward through the guide branch pipe 81, and at the same time, by setting the positions of the strip opening 1 323 and the strip opening 2 324, the water moves outward along the upper and lower sides of the brake disc, which can flush out impurities generated by grinding, and prevent impurities from affecting grinding;

[0056] Subsequently, when the rotating shaft 61 rotates, the two-layer grinding disc 3 is driven to rotate, and the threaded rod 53 is pressed or lifted, so that the brake disc can contact the grinding disc 3, and the brake disc is polished. At the same time, after the movement, water can also move out from the upper and lower sides of the brake disc respectively, so as to achieve the cooling effect and take out the impurities at the same time;

[0057] After the brake disc is clamped, at the beginning of grinding, the upper and lower sides of the brake disc are in contact with the rolling ball 334 respectively, and at the same time, the rotating shaft 61 rotates, the metal round shaft 84 and the telescopic shaft 85 rotate, driving the telescopic shaft 85 to extend outward, and the metal round shaft 84 squeezes the capsule layer 83, so that the water pressure inside the aquifer 8 is large, that is, the water in the aquifer 8 can be quickly squeezed out from the first strip opening 323 and the second strip opening 324, so that the impurities generated by the previous brake disc are cleaned out to avoid affecting the next grinding;

[0058] By setting the rectangular opening 325, the upper grinding disc 3 is pressed downward, so that the sleeve parts of the columnar sleeve 1 321 and the columnar sleeve 2 322 are increased, that is, the length of the strip opening 1 323 and the strip opening 2 324 are driven to shorten, and the rectangular opening 325 coincides with the strip opening 1 323 and the strip opening 2 324 respectively, which is equivalent to the diameter of the strip opening 1 323 and the strip opening 2 324 becoming smaller, so that the water pressure is increased. During grinding, the upper and lower grinding discs 3 are in contact with the brake disc, and water can also be pressed out from between the grinding disc 3 and the brake disc, which speeds up the grinding while avoiding temperature increase.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotating polishing device for automobile clutch brake disc, characterized in that: It comprises a support tube (1), a support plate (2) is fixed to the upper end of the support tube (1), a servo motor (6) is provided inside the support tube (1), and two layers of grinding plates (3) for grinding are provided at the upper end of the support plate (2); The outer sides of the two layers of grinding discs (3) are provided with clamping assemblies (5) for clamping; The lower end of the support plate (2) is provided with a water storage layer (8) that produces water when subjected to force, and a water outlet member (32) for discharging water is provided between the two layers of the grinding plates (3). The water outlet member (32) is connected to the water storage layer (8), and the water outlet member (32) can control the amount of water discharged when subjected to compression; A bracket (7) is fixed at the lower end of the support plate (2), the lower end of the bracket (7) is fixedly connected to the servo motor (6), the water storage layer (8) is fixed to the upper end of the bracket (7), the output end of the servo motor (6) is fixedly connected to a rotating shaft (61), the rotating shaft (61) passes through the water storage layer (8) and the support plate (2) in sequence upwards, and the upper end of the rotating shaft (61) is fixedly connected to the lower end of the grinding plate (3) at the lower layer; A bladder layer (83) is provided inside the water storage layer (8), and the upper and lower sides of the bladder layer (83) are respectively fixedly connected to the upper and lower inner walls of the water storage layer (8), and the bladder layer (83) is ring-shaped. The space between the outer side of the bladder layer (83) and the water storage layer (8) is used to store water. The bladder layer (83) expands inwards due to the squeezing effect of the stored water, and a water pipe (86) for water to enter is fixedly connected to the outer side of the water storage layer (8); The inner side of the capsule layer (83) is provided with a metal circular shaft (84) which is pressed outward by the centrifugal force of the rotating shaft (61) to press the capsule layer (83); The upper end of the water storage layer (8) is connected to a guide branch pipe (81) for squeezing water upwards; the guide branch pipe (81) is in communication with the space between the two layers of the grinding discs (3); a guide cavity (82) is provided at the upper end of the water storage layer (8); and the guide branch pipe (81) is embedded in the guide cavity (82).

2. The automobile clutch brake disc rotary polishing device according to claim 1 is characterized in that: A telescopic shaft (85) is fixedly connected to the inner side of the metal circular shaft (84); the telescopic shaft (85) is fixedly connected to the rotating shaft (61); the telescopic shaft (85) has a telescopic function, and a restoring spring is provided inside the telescopic shaft (85).

3. The automobile clutch brake disc rotary polishing device according to claim 1, characterized in that: An inner layer (31) is fixed on the grinding disc (3) at the lower end, and the grinding disc (3) at the upper end is sleeved on the inner layer (31). The two layers of the grinding discs (3) rotate in the same manner. The inner side of the inner layer (31) has a thread. A limiting sleeve (4) is provided on the grinding disc (3) at the upper end. The limiting sleeve (4) is threadedly connected to the inner layer (31), and its outer side presses the grinding disc (3) at the upper end. The brake disc is clamped between the two layers of the grinding discs (3).

4. The automobile clutch brake disc rotary polishing device according to claim 1, characterized in that: A guide plate (87) is fixedly mounted on the upper end of the support plate (2); the guide plate (87) is hollow inside and is annular in shape; the rotating shaft (61) passes through the guide plate (87) upward; an annular opening (88) is provided at the upper end of the guide plate (87); the upper end of the guide plate (87) is pressed against the grinding plate (3) at the lower end, and the two are in a sealed state; the interior of the guide plate (87) is connected to the guide branch pipe (81).

5. The automobile clutch brake disc rotary polishing device according to claim 4, characterized in that: The water outlet member (32) comprises a second columnar sleeve (322) fixed on the lower end grinding disc (3), the interior of the second columnar sleeve (322) being connected to the annular opening (88), the outer cover of the second columnar sleeve (322) being provided with a first columnar sleeve (321), the upper end of the first columnar sleeve (321) being closed and fixed to the upper end grinding disc (3); The outer side of the second columnar sleeve (322) is provided with a first strip opening (323), and the outer side of the first columnar sleeve (321) is provided with a second strip opening (324), and the outer sides of the first strip opening (323) and the second strip opening (324) are respectively flush with the opposite surfaces of the upper and lower grinding discs (3); A rectangular opening (325) is provided at the overlapping portion of the columnar sleeve 2 (322) and the columnar sleeve 1 (321), and the rectangular opening (325) is used to prevent the columnar sleeve 2 (322) and the columnar sleeve 1 (321) from completely overlapping and thus making it difficult to discharge water; The outer sides of the columnar sleeve 2 (322) and the columnar sleeve 1 (321) are provided with a return spring (326) for return.

6. The automobile clutch brake disc rotary polishing device according to claim 1, characterized in that: The upper and lower grinding discs (3) are both provided with a clamping member (33), the clamping member (33) comprising a cylinder (331) fixed to the outside of the grinding disc (3), a supporting spring (332) fixed inside the cylinder (331), a sleeve (333) fixed at the lower end of the supporting spring (332), a rotatable rolling ball (334) embedded inside the sleeve (333), the rolling ball (334) extending downward under the action of the supporting spring (332), and the rolling balls (334) of the upper and lower groups of clamping members (33) abut against each other.

7. The automobile clutch brake disc rotary polishing device according to claim 1, characterized in that: The clamping assembly (5) comprises a support column (51) fixed on the support plate (2), a collar (52) being sleeved on the outer side of the support column (51), a threaded rod (53) being transversely disposed outside the collar (52), the threaded rod (53) passing through the collar (52) and the two being threadedly connected, and a pressing plate (54) for extrusion being fixed at the end of the threaded rod (53).

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