A brake disc grinding apparatus

Abstract

The application discloses a kind of brake disc polishing equipment, belong to brake disc technical field, including: including: rack;Clamping mechanism is set on rack, for clamping brake disc;Polishing assembly, including driving mechanism, grinding disc mechanism, progressive compression mechanism and moving mechanism;Driving mechanism drives grinding disc mechanism to polish brake disc;Through progressive compression mechanism and driving mechanism cooperation;Transmission mechanism is arranged between clamping mechanism and polishing assembly.It is thus, by centrifugal spring and push block progressive compression mechanism, so that the pressure of polishing disc to brake disc is proportional to the speed of driving motor, the speed is lower in polishing initial stage, and polishing disc and brake disc are gently contacted;With the increase of speed, centrifugal force increases, and the pressure gradually increases, realizes stable grinding pressure, and this progressive flexible compression mode avoids the impact and workpiece deformation caused by traditional rigid clamping, effectively prevents brake disc surface scratch or local deformation, and improves workpiece yield.

Description

Technical Field

[0001] This invention relates to a brake disc grinding device, belonging to the field of brake disc technology. Background Technology

[0002] The automotive brake disc, also known as the brake disc, is the core rotating component of a car's disc braking system. It is usually installed inside the wheel and rotates with the wheel. When braking, the caliper pushes the brake pads to clamp the brake disc, converting the vehicle's kinetic energy into heat energy through friction, thereby achieving deceleration or stopping. Its main material is gray cast iron, while high-performance models use composite materials such as carbon ceramic. According to its structure, it can be divided into solid discs, ventilated discs, and perforated discs and slotted discs designed to improve heat dissipation and chip removal performance. With technological advancements, lightweight and high-temperature resistant carbon ceramic brake discs are becoming an important development direction. The brake disc is a circular metal disc fixed to the wheel and rotating with it. It is an important component of the disc braking system. When the driver presses the brake, the brake fluid transmits pressure to make the brake caliper clamp the brake disc. The friction between the brake pads and the brake disc converts the vehicle's kinetic energy into heat energy, thereby achieving deceleration or stopping.

[0003] Brake disc grinding equipment typically uses an upper and lower grinding disc to clamp the brake disc for grinding. In actual use, it is difficult to precisely control the clamping force of the upper and lower grinding discs on the brake disc: when the clamping force is small, the contact between the grinding disc and the brake disc surface is insufficient, resulting in low grinding efficiency and insufficient surface finish; when the clamping force is large, the brake disc is prone to local deformation or surface scratches, which can lead to workpiece scrapping in severe cases. The clamping force fluctuates greatly, making it difficult to achieve stable grinding contact. The grinding disc and the rotating column that drives the brake disc to rotate usually use a fixed speed ratio transmission, which cannot automatically adjust the speed difference according to changes in grinding load, resulting in a mismatch in the linear velocity of the grinding area, which further affects the uniformity of grinding. Summary of the Invention

[0004] The purpose of this invention is to provide a brake disc grinding device. This application provides a brake disc grinding device that uses centrifugal force in conjunction with a pusher to make the grinding disc slowly and stably contact the brake disc. At the same time, it uses a continuously variable transmission principle to achieve differential synchronous rotation between the grinding column and the rotating column, so as to improve the grinding quality and workpiece yield, and solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Compared to existing technologies, this invention provides a brake disc grinding device, comprising: a frame; a clamping mechanism disposed on the frame for clamping a brake disc; a grinding assembly including a drive mechanism, a grinding disc mechanism, a progressive clamping mechanism, and a moving mechanism; the drive mechanism drives the grinding disc mechanism to grind the brake disc, and the progressive clamping mechanism connects the drive mechanism and the grinding disc mechanism; the progressive clamping mechanism cooperates with the drive mechanism to control the interaction force between the grinding disc mechanism and the brake disc, the interaction force between the grinding disc mechanism and the brake disc being proportional to the rotational speed of the drive mechanism; the moving mechanism drives the grinding disc mechanism to grind the brake disc; and a transmission mechanism disposed between the clamping mechanism and the grinding assembly, which adaptively adjusts the rotational speed difference between the brake disc and the grinding assembly by changing the position of the grinding assembly.

[0006] Furthermore, the clamping mechanism includes: a support base fixed to the frame; a support shaft rotatably mounted on the support base for positioning the brake disc; a support frame mounted above the support base; a driven rotating shaft vertically mounted on the support frame for clamping the brake disc in cooperation with the support shaft; and a telescopic column whose output end is connected to the driven rotating shaft via a bearing for driving the driven rotating shaft to move up and down.

[0007] Furthermore, the driving mechanism includes: a drive motor mounted on the moving mechanism; an active rotating shaft connected to the output end of the drive motor; and a corresponding slot disposed on the active rotating shaft for adapting to the rotation of the grinding disc mechanism.

[0008] Furthermore, the grinding mechanism includes a grinding disc, which is slidably mounted on the drive shaft and used to grind the brake disc.

[0009] Furthermore, the progressive pressing mechanism includes: a driven rotating sleeve fitted outside the grinding disc, with an inclined surface on its inner wall; a support sleeve fitted outside the drive shaft; a centrifugal spring mounted on the support sleeve; and a push block connected to the outer end of the centrifugal spring, which cooperates with the inclined surface of the driven rotating sleeve. When the drive shaft rotates, the centrifugal spring extends outward under centrifugal force, pushing the push block to press the inclined surface of the driven rotating sleeve, causing the driven rotating sleeve to move towards the brake disc, thereby driving the grinding disc to gradually press against the brake disc.

[0010] Furthermore, the progressive clamping mechanism also includes an auxiliary reset assembly, which includes: a protective sleeve installed above the driven rotating sleeve; a reset plate for limiting the stroke of the protective sleeve; and a reset spring connected between the driven rotating sleeve and the reset plate for assisting the driven rotating sleeve in resetting.

[0011] Furthermore, the moving mechanism includes: a telescopic column, mounted on the frame; a limiting crossbar, set on the frame for guiding movement; and a supporting movable frame, connected to the output end of the telescopic column and slidably set on the limiting crossbar for supporting the grinding assembly; the telescopic column drives the supporting movable frame to move along the limiting crossbar, causing the grinding assembly to move closer to or away from the brake disc.

[0012] Furthermore, the transmission mechanism includes: a driving pulley, fixedly mounted on the driving shaft; a driven lower cone seat, slidably sleeved on the outside of the driven shaft; a driven upper cone seat, slidably sleeved on the outside of the driven shaft, and arranged opposite to the driven lower cone seat to form a V-groove; a transmission metal steel belt, wound between the driving pulley and the driven lower and upper cone seats; a support frame, mounted on the driven lower cone seat; and a support spring, disposed on the support frame, used to push the driven upper cone seat, so that the transmission metal steel belt is clamped between the driven lower and upper cone seats. When the moving mechanism drives the grinding assembly to move, the center distance between the driving pulley and the driven lower and upper cone seats changes, and the contact radius between the transmission metal steel belt and the driven cone seat changes accordingly, realizing stepless speed regulation.

[0013] Furthermore, the frame includes a CNC box and a machine tool guard, the machine tool guard being mounted above the CNC box.

[0014] Furthermore, the grinding components are in two sets, respectively located above and below the brake disc. The two sets of grinding components are symmetrically arranged and simultaneously grind the upper and lower surfaces of the brake disc.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The progressive clamping mechanism, consisting of a centrifugal spring and a pusher block, ensures that the clamping force of the grinding disc on the brake disc is proportional to the speed of the drive motor. In the initial stage of grinding, the speed is low and the clamping force is small, resulting in gentle contact between the grinding disc and the brake disc. As the speed increases, the centrifugal force increases, and the clamping force gradually increases, achieving stable grinding pressure. This progressive and flexible clamping method avoids the impact and workpiece deformation caused by traditional rigid clamping, effectively preventing scratches or local deformation on the brake disc surface and improving workpiece yield.

[0016] The continuously variable transmission mechanism consists of a drive pulley, a transmission steel belt, and a driven belt lower cone and a driven belt upper cone. When the moving mechanism drives the grinding component closer to the brake disc, the center distance between the drive pulley and the driven cone decreases, and the contact radius between the transmission steel belt and the driven cone increases. This reduces the speed of the driven shaft, making the speed of the brake disc lower than that of the grinding disc. This adaptive speed change characteristic ensures that the linear velocity difference between the grinding disc and the brake disc in the grinding area is always within a suitable range, avoiding uneven grinding or burning caused by linear velocity mismatch, and significantly improving the surface quality and consistency of the grinding.

[0017] The progressive clamping mechanism includes a return spring, a return plate, and a protective sleeve. When grinding is finished and the drive motor speed decreases, the centrifugal spring contracts, and the return spring assists in pulling the driven rotating sleeve back to its original position, allowing the grinding disc to quickly separate from the brake disc. The protective sleeve protects the centrifugal spring from dust contamination, extending its service life. The return plate limits the return stroke, preventing excessive retraction. By setting the grinding components into two sets, located above and below the brake disc respectively, the upper and lower surfaces of the brake disc can be ground simultaneously. This symmetrical layout not only balances the grinding forces and reduces the stress deformation of the brake disc, but also significantly improves processing efficiency and shortens the processing time per piece. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the internal front view structure of the present invention; Figure 4 This is a schematic diagram of the support frame structure of the present invention; Figure 5 This is a schematic diagram of the active rotating shaft structure of the present invention; Figure 6 This is a schematic diagram of the driven rotating sleeve structure of the present invention; Figure 7 This is a schematic diagram of the transmission metal steel belt structure of the present invention; Figure 8 This is a schematic diagram of the driven shaft structure of the present invention.

[0020] In the diagram: 1. CNC box; 2. Machine tool guard; 3. Telescopic column; 4. Limiting crossbar; 5. Support frame; 6. Drive motor; 7. Drive shaft; 8. Corresponding groove; 9. Grinding disc; 10. Driven rotating sleeve; 11. Support sleeve; 12. Centrifugal spring; 13. Push block; 14. Return spring; 15. Return disc; 16. Protective sleeve; 17. Support base; 18. Support shaft; 19. Support frame; 20. Driven shaft; 21. Telescopic column; 22. Drive pulley; 23. Transmission metal steel belt; 24. Lower cone seat of driven belt; 25. Support frame; 26. Support spring; 27. Upper cone seat of driven belt. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-8 The present invention provides a technical solution: A brake disc grinding device, the overall structure of which is based on a frame consisting of a CNC box 1 and a machine tool guard 2 installed above the CNC box 1, and the machine tool guard 2 is provided with a clamping mechanism, a grinding component and a transmission mechanism.

[0023] The clamping mechanism includes a support base 17, a support shaft 18, a support frame 19, a driven rotating shaft 20, and a telescopic column 21. The support base 17 is fixed inside the machine tool guard 2. The support shaft 18 is rotatably mounted on the support base 17 and is used to position the center hole of the brake disc. The support frame 19 is fixed above the support base 17. The driven rotating shaft 20 is vertically and vertically mounted on the support frame 19 and aligned vertically with the support shaft 18. The telescopic column 21 is mounted above the support base 17, and its output end is connected to the driven rotating shaft 20 through a bearing to drive the driven rotating shaft 20 to move up and down, and cooperate with the support shaft 18 to clamp the brake disc.

[0024] The grinding assembly includes a drive mechanism, a grinding disc mechanism, a progressive clamping mechanism, and a moving mechanism. The moving mechanism includes a telescopic column 3, a limiting crossbar 4, and a supporting movable frame 5. The telescopic column 3 is installed inside the machine tool guard 2. The limiting crossbar 4 is horizontally fixed on both sides inside the machine tool guard 2. The supporting movable frame 5 is connected to the output end of the telescopic column 3 and is slidably mounted on the limiting crossbar 4, allowing it to move up and down along the limiting crossbar 4. The drive mechanism includes a drive motor 6, a drive shaft 7, and a corresponding groove 8. The drive motor 6 is mounted on the supporting movable frame 5, and its output end is connected to the drive shaft 7. The drive shaft 7 has a corresponding groove 8 for sliding engagement with the grinding disc mechanism. The grinding disc mechanism includes a grinding disc 9, which is slidably mounted on the drive shaft 7 and can move axially along the drive shaft 7.

[0025] The progressive clamping mechanism includes a driven rotating sleeve 10, a support sleeve 11, a centrifugal spring 12, a push block 13, and an auxiliary reset assembly, namely a reset spring 14, a reset disc 15, and a protective sleeve 16. The support sleeve 11 is fixedly sleeved on the outside of the drive shaft 7. The inner end of the centrifugal spring 12 is fixed on the support sleeve 11, and the outer end is connected to the push block 13. The driven rotating sleeve 10 is sleeved on the outside of the grinding disc 9, and its inner wall has an inclined surface that cooperates with the push block 13. The protective sleeve 16 is installed on the top of the driven rotating sleeve 10. The reset disc 15 is set on the outside of the drive shaft 7. The reset spring 14 is connected between the driven rotating sleeve 10 and the reset disc 15. When the drive shaft 7 rotates, the centrifugal spring 12 extends outward under the action of centrifugal force, pushing the push block 13 to squeeze the inclined surface of the driven rotating sleeve 10, causing the driven rotating sleeve 10 to move downward, driving the grinding disc 9 to slide down along the drive shaft 7, and gradually pressing the brake disc.

[0026] The transmission mechanism includes a driving pulley 22, a transmission metal steel belt 23, a driven lower tapered seat 24, a support frame 25, a support spring 26, and a driven upper tapered seat 27. The driving pulley 22 is fixedly mounted on the driving shaft 7. The driven lower tapered seat 24 and the driven upper tapered seat 27 are both slidably sleeved on the outside of the driven shaft 20, and are arranged opposite each other to form a V-groove. The support frame 25 is fixedly mounted on the driven lower tapered seat 24, and the support spring 26 is mounted on the support frame 25. Pushing the driven belt upper cone seat 27 upward causes the transmission metal steel belt 23 to be clamped between the driven belt lower cone seat 24 and the driven belt upper cone seat 27. The transmission metal steel belt 23 is simultaneously wound around the driving pulley 22. When the telescopic column 3 drives the support movable frame 5 to move downward, the center distance between the driving pulley 22 and the driven cone seat decreases, and the contact radius between the transmission metal steel belt 23 and the driven cone seat increases, thereby reducing the speed of the driven shaft 20 and realizing stepless speed change.

[0027] The workflow of this embodiment is as follows: The operator sets the grinding parameters through the CNC box 1, places the brake disc to be ground outside the support shaft 18, and then controls the output shaft of the telescopic column 21 to make the driven rotating shaft 20 move downward inside the two support frames 19, so that the bottom end of the driven rotating shaft 20 is sleeved on the outside of the support shaft 18. At the same time, the brake disc to be processed is stably clamped by the cooperation of the driven rotating shaft 20 and the support shaft 18.

[0028] Then, the drive motor 6 is started, and the output shaft of the drive motor 6 drives the active rotating shaft 7 to rotate inside the support frame 5. During the rotation of the active rotating shaft 7, the external grinding disc 9 and support sleeve 11 will rotate synchronously. In turn, the rotation of the support sleeve 11 will drive the external centrifugal spring 12 and push block 13 to rotate synchronously. The centrifugal force generated by the rotation of the centrifugal spring 12 and push block 13 will stretch the centrifugal spring 12, causing the centrifugal spring 12 to push the push block 13 to move outward. During the outward movement of the push block 13, the driven rotating sleeve 10 will be squeezed, so that the tension of the return spring 14 connected to the upper driven rotating sleeve 10 is the same as the gravity of the lower driven rotating sleeve 10. Using the contact slope of the push block 13 and the driven rotating sleeve 10, the upper and lower telescopic columns 3 are controlled to push towards each other until the two telescopic columns 3 are respectively attached to the upper and lower surfaces of the brake disc, and the brake disc is processed at the same time.

[0029] During the processing, the rotation of the active shaft 7 will synchronously drive the external active pulley 22 to rotate. The transmission of the transmission metal steel belt 23 will then drive the driven belt lower cone seat 24 and driven belt upper cone seat 27 to rotate. The driven belt lower cone seat 24 will drive the internal driven shaft 20 to rotate, so that the driven shaft 20 and the support shaft 18 drive the brake disc to rotate between the support base 17 and the telescopic column 21. At the same time, the rotation speed of the brake disc will be lower than the rotation speed of the telescopic column 3.

[0030] During the processing, the output shaft of the telescopic column 3 is retracted. The telescopic column 3 drives the support frame 5 to move parallel to the support base 17 and the telescopic column 21 under the restriction of the limit bar 4, so that the two telescopic columns 3 are in contact with the brake disc for processing. At the same time, as the drive pulley 22 gradually approaches the driven belt lower cone seat 24 and the driven belt upper cone seat 27, the contact radius between the transmission metal steel belt 23 and the driven belt lower cone seat 24 and the driven belt upper cone seat 27 will gradually increase. The support spring 26 will push the driven belt upper cone seat 27 under the support of the support frame 25 to ensure stable clamping of the transmission metal steel belt 23, so that the transmission metal steel belt 23 can be stably transmitted. At the same time, the speed of the driven shaft 20 will gradually decrease.

[0031] After processing is completed, the output shaft of the telescopic column 3 is extended, causing the support frame 5 to drive the grinding mechanism away from the clamping mechanism. At the same time, the rotation speed of the drive motor 6 is gradually reduced, causing the centrifugal spring 12 and push block 13 to gradually retract, thereby causing the upper and lower grinding discs 9 and the driven rotating sleeve 10 to gradually separate from the telescopic column 3, completing the reset.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A brake disc grinding device, comprising: frame; A clamping mechanism, mounted on the frame, is used to clamp the brake disc; Its characteristic is that it further includes: The grinding assembly includes a drive mechanism, a grinding disc mechanism, a progressive clamping mechanism, and a moving mechanism; The drive mechanism drives the grinding disc mechanism to grind the brake disc, and the progressive clamping mechanism connects the drive mechanism and the grinding disc mechanism. The progressive clamping mechanism cooperates with the drive mechanism to control the interaction force between the grinding disc mechanism and the brake disc. The interaction force between the grinding disc mechanism and the brake disc is proportional to the rotational speed of the drive mechanism. The moving mechanism drives the grinding disc mechanism to grind the brake disc. A transmission mechanism is disposed between the clamping mechanism and the grinding assembly, which adaptively adjusts the speed difference between the brake disc and the grinding assembly by changing the position of the grinding assembly.

2. The brake disc grinding equipment according to claim 1, characterized in that, The clamping mechanism includes: Support base (17) is fixed on the frame; The support shaft (18) is rotatably mounted on the support base (17) and is used to position the brake disc; A support frame (19) is positioned above the support base (17); Driven rotating shaft (20) is vertically mounted on support frame (19) and cooperates with support shaft (18) to clamp brake disc; The telescopic column (21) has its output end connected to the driven shaft (20) via a bearing, and is used to drive the driven shaft (20) to rise and fall.

3. The brake disc grinding equipment according to claim 1, characterized in that, The drive mechanism includes: The drive motor (6) is mounted on the moving mechanism; The active rotating shaft (7) is connected to the output end of the drive motor (6); The corresponding groove (8) is set on the active rotating shaft (7) to adapt to the rotation of the grinding disc mechanism.

4. The brake disc grinding equipment according to claim 3, characterized in that, The grinding mechanism includes a grinding disc (9), which is slidably mounted on the active rotating shaft (7) and is used to grind the brake disc.

5. The brake disc grinding equipment according to claim 4, characterized in that, The progressive clamping mechanism includes: Driven rotating sleeve (10) is fitted outside the grinding disc (9), and its inner wall is provided with a bevel; A support sleeve (11) is fitted onto the outside of the drive shaft (7); Centrifugal spring (12) is mounted on support sleeve (11); Push block (13) is connected to the outer end of centrifugal spring (12) and cooperates with the inclined surface of driven rotating sleeve (10); When the active rotating shaft (7) rotates, the centrifugal spring (12) extends outward under the action of centrifugal force, pushing the push block (13) to squeeze the inclined surface of the driven rotating sleeve (10), causing the driven rotating sleeve (10) to move towards the brake disc, driving the grinding disc (9) to gradually press the brake disc.

6. The brake disc grinding equipment according to claim 5, characterized in that, The progressive clamping mechanism further includes an auxiliary reset component, which includes: A protective sleeve (16) is installed above the driven rotating sleeve (10); A reset plate (15) is used to limit the travel of the protective sleeve (16); The reset spring (14) is connected between the driven rotating sleeve (10) and the reset plate (15) to assist the driven rotating sleeve (10) in resetting.

7. The brake disc grinding equipment according to claim 1, characterized in that, The mobile mechanism includes: Telescopic column (3), installed on the frame; A limit bar (4) is installed on the frame to guide movement; The support frame (5) is connected to the output end of the telescopic column (3) and is slidably set on the limiting crossbar (4) to support the grinding components; The telescopic column (3) drives the support frame (5) to move along the limiting crossbar (4), causing the grinding assembly to move closer to or away from the brake disc.

8. The brake disc grinding equipment according to claim 2, characterized in that, The transmission mechanism includes: The drive pulley (22) is fixedly installed on the drive shaft (7); The driven belt lower cone seat (24) is slidably sleeved on the outside of the driven rotating shaft (20); The driven belt upper cone seat (27) is slidably sleeved on the outside of the driven rotating shaft (20), and is arranged opposite to the driven belt lower cone seat (24) to form a V-groove; A transmission metal steel belt (23) is wound between the driving pulley (22) and the driven belt lower cone seat (24) and the driven belt upper cone seat (27); A support frame (25) is mounted on the driven belt lower cone seat (24); A support spring (26) is provided on the support frame (25) to push the driven belt upper cone seat (27) so that the transmission metal steel belt (23) is clamped between the driven belt lower cone seat (24) and the driven belt upper cone seat (27); When the moving mechanism drives the grinding assembly to move, the center distance between the driving pulley (22) and the driven belt lower cone seat (24) and the driven belt upper cone seat (27) changes, and the contact radius between the transmission metal steel belt (23) and the driven cone seat changes accordingly, thus realizing stepless speed change.

9. The brake disc grinding equipment according to claim 1, characterized in that, The frame includes a CNC box (1) and a machine tool guard (2), the machine tool guard (2) being mounted above the CNC box (1).

10. A brake disc grinding device according to claim 1, characterized in that, The grinding components consist of two sets, which are respectively located above and below the brake disc. The two sets of grinding components are arranged symmetrically and simultaneously grind the upper and lower surfaces of the brake disc.

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