Synchronous grinding device for two coaxial brake discs of automobile

Abstract

The present invention discloses a synchronous grinding device for two coaxial brake discs of an automobile, comprising: a power device, wherein the power device has two output shafts, which are symmetrically arranged on the same axis, and the two coaxial brake discs to be ground are detachably mounted on the two output shafts, and the power device is used to drive the two coaxial brake discs to be ground to rotate synchronously; two sets of grinding mechanisms, which are symmetrically arranged on both sides of the power device and are respectively used to synchronously grind the two coaxial brake discs; each set of grinding mechanisms includes two groups of grinding components, which are symmetrically arranged on both sides of the brake disc and are respectively used to grind the inner side and the outer side of the brake disc; the synchronous grinding of the two coaxial brake discs of the automobile is achieved, the thickness inconsistency of the two coaxial brake discs of the automobile is avoided after grinding, the damage to the brake discs during the grinding process is reduced, the excessive grinding of the brake discs is avoided, and the service life of the brake discs is extended.

Description

Technical Field

[0001] The invention relates to a synchronous grinding device for two coaxial brake discs of an automobile, belonging to the technical field of automobile brake disc grinding. Background Art

[0002] The brake disc is a circular disc. When the car is moving, the brake disc rotates with the wheel. When the brake is applied, the brake caliper clamps the brake disc to generate braking force, thereby slowing down or stopping the car. Since the brake disc is a very important component in the car's braking system, the quality of the brake disc directly affects the car's braking performance and safety. As the car's mileage increases, the wear of the brake disc will also increase, causing burrs, scratches, ridges, grooves and other phenomena to appear on the brake disc, which will cause noise and abnormal sounds when the car is driving, and brake shake when the car brakes. Therefore, after the car reaches a certain mileage, the car's braking system needs to be maintained, which includes inspecting the brake disc to determine whether the brake disc needs to be polished and maintained.

[0003] At present, most of the devices for grinding brake discs are for grinding single brake discs. Therefore, the two coaxial brake discs need to be ground separately, which easily leads to the situation that the grinding degree of the two coaxial brake discs is inconsistent. For example, the thickness of the two coaxial brake discs after grinding is inconsistent. The thickness of one brake disc after grinding is relatively thin, and the thickness of the other brake disc after grinding is relatively thick. In this case, the brake disc and the brake pad will affect the braking force of the two coaxial wheels. Although the degree of this influence is relatively small, it cannot be guaranteed whether the degree of this influence will gradually increase during subsequent use, thereby causing safety hazards.

[0004] At the same time, the existing brake disc grinding devices all use air cylinders, hydraulic cylinders or electric cylinders to drive the grinding block to contact the rotating brake disc, thereby achieving the grinding of the brake disc. Since the air cylinder, hydraulic cylinder or electric cylinder drives the grinding block to contact the brake disc surface, it is equivalent to hard contact. The force applied by the grinding block on the brake disc surface is relatively stronger, which will invisibly cause excessive grinding of the brake disc and affect the service life of the brake disc; and, for uneven brake discs, the instantaneous thickness of the brake disc passing through the grinding block will change slightly when rotating. When a relatively thick area on the brake disc contacts the grinding block, since the positions of the two are relatively fixed, the two will generate interacting squeezing and shearing forces, resulting in momentary violent collisions and jams during the grinding process, which is also a damage to the brake disc, and in severe cases, the brake disc will be cracked. Summary of the Invention

[0005] The purpose of the present invention is to provide a synchronous grinding device for two coaxial brake discs of an automobile, which is used to synchronously grind the two coaxial brake discs of an automobile, so that the grinding process and grinding degree of the two coaxial brake discs of the automobile are consistent, avoiding the situation where the two coaxial brake discs of the automobile have inconsistent thickness after grinding, eliminating safety hazards; at the same time, avoiding hard contact between the grinding material and the brake disc surface, reducing damage to the brake disc during the grinding process.

[0006] The technical solution adopted in the present invention is as follows:

[0007] The synchronous grinding device for two coaxial brake discs of an automobile comprises:

[0008] A power device having two output shafts, the two output shafts being coaxial and symmetrically arranged, the two coaxial brake discs to be polished being detachably mounted on the two output shafts, and the power device being used to drive the two coaxial brake discs to be polished to rotate synchronously;

[0009] Two sets of grinding mechanisms are symmetrically arranged on both sides of the power device and are used to synchronously grind two coaxial brake discs; each set of grinding mechanisms includes two groups of grinding components, which are symmetrically arranged on both sides of the brake disc and are used to grind the inner and outer sides of the brake disc respectively.

[0010] As a further preference of the present invention, the grinding assembly includes a grinding disc with an annular structure, an airbag with an annular structure, a limiting disc with an annular structure, a mounting tube and a plurality of limiting bolts. The tail end of the mounting tube is used to fix the grinding assembly. The limiting disc is fixedly sleeved on the outer circumferential surface of the head end of the mounting tube. The airbag is arranged between the limiting disc and the grinding disc. A plurality of through holes for a plurality of limiting bolts to pass through are formed on the limiting disc. The plurality of through holes are evenly arranged circumferentially. A plurality of channels corresponding to the plurality of through holes are formed on the airbag. The back of the grinding disc is formed with channels corresponding to the plurality of channels. multiple threaded holes; the screw of the limit bolt passes through the limit plate and the airbag through the through hole and the channel and is threadedly connected to the threaded hole on the back of the grinding disc, and a spring is sleeved on the screw between the limit plate and the nut of the limit bolt; the airbag is connected to the external inflation and deflation device; the external inflation and deflation device is used to inflate and deflate the airbag, and after the airbag is inflated, it expands and pushes the grinding disc to move toward the brake disc and contact the brake disc. At this time, the grinding disc drives the limit bolt to compress the spring; the airbag contracts after being deflated, and the spring releases the elastic force to cause the limit bolt to pull the grinding disc to move away from the brake disc and disengage from the brake disc.

[0011] Furthermore, grooves for limiting the position of the airbag are formed on the opposite surfaces of the grinding disc and the limiting disc respectively, so as to enable the grinding disc and the limiting disc to better clamp the airbag.

[0012] As a further preference of the present invention, the mounting tube of the grinding assembly located on the inner side of the brake disc is connected to the outer casing of the power unit, and the output shaft of the power unit passes through the mounting tube of the grinding assembly located on the inner side of the brake disc. A disc is provided at the end of the output shaft of the power unit, and a stud corresponding to the mounting hole of the brake disc is provided on the front of the disc. The brake disc is mounted on the disc through the stud, and a nut is threaded on the stud to lock the brake disc; the diameter of the disc and the diameter of the brake disc boss are both smaller than the inner ring diameter of the annular structure grinding disc; the overall structure is more compact, and the inner ring hole of the grinding disc is used to accommodate the disc or the brake disc boss during grinding.

[0013] As a further preference of the present invention, each set of grinding mechanisms also includes a linear displacement device, which is arranged on the outside of the brake disc, and the grinding assembly located on the outside of the brake disc is connected to the linear displacement device, and the linear displacement device is used to drive the grinding assembly located on the outside of the brake disc to move toward the brake disc or away from the brake disc; when the linear displacement device drives the grinding assembly located on the outside of the brake disc to move away from the brake disc, it is used to increase the distance between the grinding assembly located on the outside of the brake disc and the brake disc, thereby facilitating the disassembly and assembly of the brake disc; when the brake disc is installed, the linear displacement device drives the grinding assembly located on the outside of the brake disc to move toward the brake disc, so that the grinding assembly located on the outside of the brake disc moves to the initial grinding position.

[0014] As a further preference of the present invention, at least one threaded hole on the grinding disc passes through the grinding disc, and at least one limiting bolt in the grinding assembly is a hollow tube structure. The limiting bolt of the hollow tube structure is threadedly connected to the threaded hole passing through the grinding disc, and the nut opening of the limiting bolt of the hollow tube structure is connected to the external water supply pipeline; when the grinding disc is grinding the brake disc, water in the external water supply pipeline flows to the contact surface between the grinding disc and the brake disc through the limiting bolt of the hollow tube structure, and as the brake disc rotates, the water flows to cover the entire contact surface between the grinding disc and the brake disc. During the grinding process, water plays a role in cooling, dissipating heat and lubricating to a certain extent, thereby improving the grinding effect.

[0015] Furthermore, an arc-shaped groove is formed on the front side of the grinding disc, and the arc-shaped groove is connected to the threaded hole passing through the grinding disc, and the opening of the screw end of the limiting bolt of the hollow tube structure is located at the inner bottom of the arc-shaped groove; when the grinding disc is grinding the brake disc, water flowing out of the limiting bolt of the hollow tube structure flows into the arc-shaped groove, and as the brake disc rotates, the water can better flow and cover the contact surface between the grinding disc and the brake disc, and at the same time, it can also increase the water flow between the grinding disc and the brake disc.

[0016] In order to remove burrs generated on the outer circumferential surface of the brake disc when the grinding mechanism grinds the brake disc, each grinding mechanism further includes an outer circumferential grinding component, which is used to grind the outer circumferential surface of the brake disc.

[0017] Furthermore, the outer circumference grinding assembly includes a box body, a motor, an arc-shaped action rod, an arc-shaped action plate and sandpaper; the motor is arranged inside the box body, and an opening is formed on the top of the box body, one end of the arc-shaped action rod extends into the box body and is connected to the output shaft of the motor, and the other end of the arc-shaped action rod extends out of the box body and is hinged to the outer arc surface of the arc-shaped action plate, the inner arc surface of the arc-shaped action plate faces the outer circumferential surface of the brake disc, and the sandpaper is arranged on the inner arc surface of the arc-shaped action plate; the motor drives the arc-shaped action rod to rotate, so that the arc-shaped action rod drives the arc-shaped action plate to move toward the outer circumferential surface of the brake disc and causes the sandpaper to grind the outer circumferential surface of the brake disc or causes the arc-shaped action rod to drive the arc-shaped action plate to move away from the outer circumferential surface of the brake disc and causes the sandpaper to stop grinding the outer circumferential surface of the brake disc.

[0018] Furthermore, a flexible material is provided between the sandpaper and the inner arc surface of the arc-shaped action plate; the flexible material has a certain elasticity. When the arc-shaped action plate presses the sandpaper to contact the outer circumferential surface of the brake disc, the sandpaper can be concave toward the arc-shaped action plate, so that the sandpaper can grind the outer circumferential surface of the brake disc and the outer circumferential edge of the brake disc. At the same time, the flexible material provides an elastic force, and the sandpaper forms an elastic contact with the brake disc, so that the sandpaper can better remove burrs on the brake disc and avoid excessive grinding of the outer circumferential surface of the brake disc.

[0019] The present invention is beneficial in that:

[0020] (1) Realize the synchronous grinding of the two coaxial brake discs of the car, so that the grinding process and grinding degree of the two coaxial brake discs of the car are consistent, avoid the situation that the thickness of the two coaxial brake discs of the car are inconsistent after grinding, and eliminate safety hazards;

[0021] (2) During the grinding process, the grinding disc and the brake disc form a circular contact surface. Therefore, the front of the grinding disc forms a complete surface contact with the surface of the brake disc. The two are always in a sliding friction state. For the uneven brake disc, the thickness change of the brake disc during rotation will not cause a large shear force between the two, avoiding instantaneous violent collisions and jamming during the grinding process, and reducing damage to the brake disc during the grinding process.

[0022] (3) During the grinding process, the grinding disc is provided with a forward thrust by the airbag. When an interactive squeezing force is formed between the grinding disc and the brake disc, the grinding disc has a certain ability to retreat backward under the elastic action of the airbag, thereby forming an elastic contact between the grinding disc and the brake disc. The force applied by the grinding disc to the surface of the brake disc is relatively soft, which avoids excessive grinding of the brake disc and extends the service life of the brake disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the front structure of the present invention Figure 1 , wherein the grinding mechanism is in an ungrinded state;

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross-section structure of the grinding mechanism;

[0025] Figure 3 yes Figure 1 A-direction view in;

[0026] Figure 4 This is a schematic diagram of the front structure of the present invention Figure 2 , wherein the grinding mechanism is in a grinding state;

[0027] Figure 5 yes Figure 4 Schematic diagram of the cross-section structure of the grinding mechanism;

[0028] Figure 6 It is a schematic diagram of the exploded structure of the grinding assembly of the present invention;

[0029] Figure 7 It is a front structural schematic diagram of the grinding disc of the present invention;

[0030] Figure 8 1 is a front structural schematic diagram of the airbag of the present invention;

[0031] Figure 9 This is a schematic diagram of the exploded structure of the brake disc installation location of the present invention;

[0032] Figure 10 It is a front structural schematic diagram of the disc of the present invention;

[0033] Figure 11 It is a schematic diagram of the structure of the present invention in practical application;

[0034] The meaning of the reference numerals in the figures:

[0035] 1-power unit, 2-output shaft, 3-brake disc, 4-disc, 5-stud, 6-nut, 7-external water supply pipe, 8-air nozzle, 10-arc-shaped groove, 11-grinding disc, 12-airbag, 13-limiting disc, 14-mounting tube, 15-limiting bolt, 16-channel, 17-spring, 18-linear displacement device, 19-mounting plate, 21-box, 22-motor, 23-arc-shaped action rod, 24-arc-shaped action plate, 25-sandpaper, 26-flexible material, 31-cabinet, 32-leakage hole, 33-water collection tank, 34-cover. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1-10As shown, this embodiment is a synchronous grinding device for two coaxial brake discs of an automobile, comprising:

[0038] The power device 1 has two output shafts 2, which are arranged symmetrically on the same axis. Two coaxial brake discs 3 to be polished are detachably mounted on the two output shafts 2. The power device 1 is used to drive the two coaxial brake discs 3 to be polished to rotate synchronously. The power device 1 in this embodiment adopts a dual-output shaft motor. In actual application, the power device 1 can also be composed of a conventional motor and a dual-output shaft gear box.

[0039] Two sets of grinding mechanisms are symmetrically arranged on both sides of the power device 1 and are used to grind the two coaxial brake discs 3 synchronously; each set of grinding mechanisms includes two groups of grinding components, which are symmetrically arranged on both sides of the brake disc 3 and are used to grind the inner and outer sides of the brake disc 3 respectively.

[0040] The grinding assembly in this embodiment includes a grinding disc 11 with an annular structure, an air bag 12 with an annular structure, a limiting disc 13 with an annular structure, a mounting tube 14 and four limiting bolts 15. The tail end of the mounting tube 14 is used to fix the grinding assembly, and the limiting disc 13 is fixedly sleeved on the outer circumferential surface of the head end of the mounting tube 14. The air bag 12 is arranged between the limiting disc 13 and the grinding disc 11. Four through holes are formed on the limiting disc 13 for four limiting bolts 15 to pass through. The four through holes are evenly arranged circumferentially. Four channels 16 corresponding to the four through holes are formed on the air bag 12. Four threaded holes corresponding to the four channels 16 are formed on the back of the grinding disc 11; the screw of the limiting bolt 15 passes through the limiting disc 13 and the air bag 12 through the through holes and the channel 16 and is threadedly connected to the threaded hole on the back of the grinding disc 11. A spring 17 is sleeved on the screw between the limiting disc 13 and the nut of the limiting bolt 15; The airbag 12 is connected to the external inflation and deflation device; the external inflation and deflation device is used to inflate and deflate the airbag 12. After inflation, the airbag 12 expands and pushes the grinding disc 11 to move towards the brake disc 3 and contact the brake disc 3, thereby grinding the brake disc 3; at this time, the grinding disc 11 drives the limit bolt 15 to compress the spring 17; the airbag 12 contracts after being deflated, and the spring 17 releases the elastic force to pull the limit bolt 15 to pull the grinding disc 11 to move away from the brake disc 3 and disengage from the brake disc 3; the limit bolt 15 and the through hole and the channel 16 are all clearance-fitted. If necessary, the limit bolt 15 and the through hole can be slidably connected by a linear bearing; in actual application, the number of limit bolts 15 can also be set to be more. At the same time, the number of through holes on the limit disc 13, the channel 16 on the airbag 12 and the threaded holes on the grinding disc 11 are all adjusted accordingly according to the number of limit bolts 15.

[0041] In this embodiment, grooves for limiting the position of the airbag 12 are respectively formed on the opposite surfaces of the grinding disc 11 and the limiting disc 13 , so that the grinding disc 11 and the limiting disc 13 can better clamp the airbag 12 .

[0042] The mounting tube 14 of the grinding assembly located on the inner side of the brake disc 3 is connected to the outer casing of the power unit 1, and the output shaft 2 of the power unit 1 passes through the mounting tube 14 of the grinding assembly located on the inner side of the brake disc. A disc 4 is provided at the end of the output shaft 2 of the power unit 1, and a stud 5 corresponding to the mounting hole of the brake disc 3 is provided on the front of the disc 4. The brake disc 3 is mounted on the disc 4 through the stud 5, and a nut 6 is threaded on the stud 5 to lock the brake disc 3; the diameter of the disc 4 and the diameter of the boss of the brake disc 3 are both smaller than the inner ring diameter of the annular structure grinding disc 11; making the overall structure more compact, the inner ring hole of the grinding disc 11 is used to accommodate the disc 4 or the boss of the brake disc 3 during grinding.

[0043] Each grinding mechanism of this embodiment also includes a linear displacement device 18, which is arranged on the outside of the brake disc 3. The grinding assembly located on the outside of the brake disc 3 is connected to the linear displacement device 18. The linear displacement device 18 is used to drive the grinding assembly located on the outside of the brake disc 3 to move toward the brake disc 3 or away from the brake disc 3; when the linear displacement device 18 drives the grinding assembly located on the outside of the brake disc 3 to move away from the brake disc 3, it is used to increase the distance between the grinding assembly located on the outside of the brake disc 3 and the brake disc 3, thereby facilitating the disassembly and assembly of the brake disc 3; when the brake disc 3 is installed, the linear displacement device 18 drives the grinding assembly located on the outside of the brake disc 3 to move toward the brake disc 3, so that the grinding assembly located on the outside of the brake disc 3 moves to the initial grinding position; the linear displacement device 18 in this embodiment adopts a linear motor, and a mounting plate 19 is vertically arranged on the slide of the linear motor. The tail end of the mounting tube 14 of the grinding assembly located on the outside of the brake disc 3 is connected to the mounting plate 19. In actual application, the linear displacement device 18 can also adopt a screw motor.

[0044] In this embodiment, one of the threaded holes on the grinding disc 11 passes through the grinding disc 11, and one of the limiting bolts 15 of the grinding assembly is a hollow tube structure. The limiting bolt 15 of the hollow tube structure is threadedly connected to the threaded hole passing through the grinding disc 11, and the nut opening of the limiting bolt 15 of the hollow tube structure is connected to the external water supply pipe 7; when the grinding disc 11 is grinding the brake disc 3, the water in the external water supply pipe 7 flows to the contact surface between the grinding disc 11 and the brake disc 3 through the limiting bolt 15 of the hollow tube structure, and as the brake disc 3 rotates, the water flows to cover the entire contact surface between the grinding disc 11 and the brake disc 3. The water plays a role of cooling, dissipating heat and lubricating in the grinding process, thereby improving the grinding effect; in this embodiment, the grinding disc 11 An arc-shaped groove 10 is formed on the front side, and the arc-shaped groove 10 is connected to the threaded hole passing through the grinding disc 11, and the opening of the screw end of the limiting bolt 15 of the hollow tube structure is located at the inner bottom of the arc-shaped groove 10; when the grinding disc 11 grinds the brake disc 3, water flowing out of the limiting bolt 15 of the hollow tube structure flows into the arc-shaped groove 10. As the brake disc 3 rotates, the water can better flow and cover the contact surface between the grinding disc 11 and the brake disc 3. At the same time, it can also increase the water flow between the grinding disc 11 and the brake disc 3; in actual application, a plurality of limiting bolts 15 of the hollow tube structure can also be provided. At the same time, a plurality of threaded holes passing through the grinding disc 11 are provided on the grinding disc 11, which correspond to the limiting bolts 15 of the plurality of hollow tube structures.

[0045] In order to remove the burrs generated on the outer circumference of the brake disc 3 when the grinding mechanism grinds the brake disc 3, each set of grinding mechanisms also includes an outer circumference grinding component, which is used to grind the outer circumference of the brake disc 3; the outer circumference grinding component includes a box body 21, a motor 22, an arc-shaped action rod 23, an arc-shaped action plate 24 and sandpaper 25; the motor 22 is arranged inside the box body 21, and an opening is formed at the top of the box body 21. One end of the arc-shaped action rod 23 extends into the box body 21 and is connected to the output shaft of the motor 22, and the other end of the arc-shaped action rod 23 extends out The box body 21 is hinged to the outer arc surface of the arc-shaped action plate 24, the inner arc surface of the arc-shaped action plate 24 faces the outer circumferential surface of the brake disc 3, and the sandpaper 25 is arranged on the inner arc surface of the arc-shaped action plate 24; the motor 22 drives the arc-shaped action rod 23 to rotate, so that the arc-shaped action rod 23 drives the arc-shaped action plate 24 to move toward the outer circumferential surface of the brake disc 3 and causes the sandpaper 25 to grind the outer circumferential surface of the brake disc 3, or the arc-shaped action rod 23 drives the arc-shaped action plate 24 to move away from the outer circumferential surface of the brake disc 3 and causes the sandpaper 25 to stop grinding the outer circumferential surface of the brake disc 3.

[0046] In this embodiment, a flexible material 26 is provided between the sandpaper 25 and the inner arc surface of the arc-shaped action plate 24; the flexible material 26 has a certain elasticity. When the arc-shaped action plate 24 presses the sandpaper 25 to contact the outer circumferential surface of the brake disc 3, the sandpaper 25 can be recessed toward the arc-shaped action plate 24, so that the sandpaper 25 can grind the outer circumferential surface of the brake disc 3 and the outer circumferential edge of the brake disc 3. At the same time, the flexible material 26 provides an elastic force, and the sandpaper 25 forms an elastic contact with the brake disc 3, so that the sandpaper 25 can better remove burrs on the brake disc 3 and avoid excessive grinding of the outer circumferential surface of the brake disc 3; in this embodiment, the flexible material 26 is made of sponge material. In actual application, the flexible material 26 can also be made of silicone material.

[0047] like Figure 11 As shown, in actual application, this embodiment further includes a cabinet 31, the top of the cabinet 31 is a concave structure, and the grinding device described in this embodiment is installed as a whole in the concave structure on the top of the cabinet 31, and a plurality of water leakage holes 32 are provided at the inner bottom of the concave structure. A water collection tank 33 is provided inside the cabinet 31, and the water collection tank 33 is used to collect water leaking from the water leakage holes 32. A clean water tank is also provided inside the cabinet 31, and a water pump is provided in the clean water tank. The water pump is used to pump the water in the clean water tank into the external water supply pipeline 7; the external inflation and deflation device is provided inside the cabinet 31 and is connected to the air nozzle 8 of the air bag 12 through the air pipe. ; A cover shell 34 is provided around the grinding device, and the rear edge of the cover shell 34 is hinged to the cabinet 31. The cover shell 34 is opened to completely expose the grinding device, and the cover shell 34 is closed to place the grinding device in a relatively closed environment, thereby improving safety during the grinding process; the cover shell 34 is made of transparent material. If the cover shell 34 is made of non-transparent material, an observation window can be provided on the cover shell 34; the power device 1, the external inflation and deflation device, the linear displacement device 18, the water pump and the motor 22 of the outer circumference grinding assembly can be controlled by a PLC controller so that the various components can work in coordination with each other.

[0048] The polishing process of this embodiment is as follows:

[0049] During the grinding process, the two grinding mechanisms on both sides of the power device 1 operate synchronously to grind the two coaxial brake discs 3 of the car synchronously, so that the grinding process and grinding degree of the two coaxial brake discs 3 of the car are consistent, thereby avoiding the situation where the thickness of the two coaxial brake discs 3 of the car are inconsistent after grinding, and eliminating safety hazards;

[0050] First, the two coaxial brake discs 3 to be polished are respectively mounted on the discs 4 of the two output shafts 2 of the power unit 1; the linear displacement device 18 is used to drive the polishing assembly located on the outside of the brake discs 3 to move closer to the brake discs 3, so that the polishing assembly located on the outside of the brake discs 3 moves to the initial polishing position;

[0051] Then, the two output shafts 2 of the power device 1 drive the two brake discs 3 to rotate, and the external inflation and deflation device inflates the airbags 12. The inflation pressure of all airbags 12 is consistent, and the displacement of the grinding disc 11 pushed forward by the airbags 12 is consistent; after inflation, the airbags 12 expand and push the grinding disc 11 toward the direction of the brake disc 3 and contact the brake disc 3. At this time, the grinding disc 11 drives the limiting bolt 15 to compress the spring 17; the grinding disc 11 with an annular structure contacts the brake disc 3 to form an annular contact surface, which is the grinding surface, thereby realizing the grinding of the brake disc 3; in this process, the water in the external water supply pipeline 7 flows to the contact surface between the grinding disc 11 and the brake disc 3 through the limiting bolt 15 of the hollow tube structure, and as the brake disc 3 rotates, the water flow covers the entire contact surface between the grinding disc 11 and the brake disc 3.

[0052] During the grinding process, since the grinding disc 11 and the brake disc 3 form a circular contact surface, the front side of the grinding disc 11 forms a complete surface contact with the surface of the brake disc 3, and the two are always in a sliding contact friction state. For the uneven brake disc 3, the thickness change of the brake disc 3 during rotation will not cause a large shear force between the two, avoiding instantaneous violent collision and jamming during the grinding process, and reducing damage to the brake disc 3 during the grinding process; at the same time, since the airbag 12 has a certain elastic effect, and the grinding disc 11 is provided with a forward thrust by the airbag 12, when an interactive squeezing force is formed between the grinding disc 11 and the brake disc 3, under the elastic action of the airbag 12, the grinding disc 11 has a certain ability to retreat backward, thereby achieving elastic contact between the grinding disc 11 and the brake disc 3 during the grinding process, and the force applied by the grinding disc 11 on the surface of the brake disc 3 is relatively soft, avoiding excessive grinding of the brake disc 3 and extending the service life of the brake disc 3.

[0053] After the grinding mechanism finishes grinding, the external inflation and deflation device deflates the airbag 12. The airbag 12 shrinks after being deflated, and the spring 17 releases its elastic force to cause the limit bolt 15 to pull the grinding disc 11 away from the brake disc 3 and disengage from the brake disc 3.

[0054] The motor 22 of the outer circumference grinding assembly drives the arc-shaped action rod 23 to rotate counterclockwise by a certain angle, so that the arc-shaped action rod 23 drives the arc-shaped action plate 24 to move toward the outer circumference of the brake disc 3 and causes the sandpaper 25 to grind the outer circumference of the brake disc 3, thereby removing burrs on the outer circumference of the brake disc 3 when the grinding mechanism grinds the brake disc 3;

[0055] After the outer circumference of the brake disc 3 is polished, the motor 22 of the outer circumference polishing assembly drives the arc action rod 23 to rotate clockwise by a certain angle, so that the arc action rod 23 drives the arc action plate 24 to move away from the outer circumference of the brake disc 3 and the sandpaper 25 stops polishing the outer circumference of the brake disc 3.

[0056] Finally, the linear displacement device 18 is used to drive the grinding assembly located on the outside of the brake disc 3 to move away from the brake disc 3, thereby increasing the distance between the grinding assembly located on the outside of the brake disc 3 and the brake disc 3. Finally, the two brake discs 3 are removed from the discs 4 of the two output shafts 2 of the power device 1 to complete the grinding process.

[0057] This embodiment describes the main grinding process and principle of the grinding device, and does not elaborate on some specific details. As a technician engaged in the post-maintenance and maintenance of automobiles, you should be able to fully understand and implement this embodiment based on the description of this embodiment.

[0058] Compared with the traditional brake disc grinding device, this embodiment has the following advantages:

[0059] (1) Realize the synchronous grinding of the two coaxial brake discs of the car, so that the grinding process and grinding degree of the two coaxial brake discs of the car are consistent, avoid the situation that the thickness of the two coaxial brake discs of the car are inconsistent after grinding, and eliminate safety hazards;

[0060] (2) During the grinding process, the grinding disc and the brake disc form a circular contact surface. Therefore, the front of the grinding disc forms a complete surface contact with the surface of the brake disc. The two are always in a sliding friction state. For the uneven brake disc, the thickness change of the brake disc during rotation will not cause a large shear force between the two, avoiding instantaneous violent collisions and jamming during the grinding process, and reducing damage to the brake disc during the grinding process.

[0061] (3) During the grinding process, the grinding disc is provided with a forward thrust by the airbag. When an interactive squeezing force is formed between the grinding disc and the brake disc, the grinding disc has a certain ability to retreat backward under the elastic action of the airbag, thereby forming an elastic contact between the grinding disc and the brake disc. The force applied by the grinding disc to the surface of the brake disc is relatively soft, which avoids excessive grinding of the brake disc and extends the service life of the brake disc.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0063] In the description of the present invention, it should be noted that: unless otherwise clearly stipulated and limited, the terms "installation", "connection", "setting" and "formation" should be understood in a broad sense; for example, it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements; for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. The synchronous grinding device for two coaxial brake discs of automobiles includes: A power device having two output shafts, the two output shafts being coaxial and symmetrically arranged, the two coaxial brake discs to be polished being detachably mounted on the two output shafts, and the power device being used to drive the two coaxial brake discs to be polished to rotate synchronously; Two sets of grinding mechanisms, the two sets of grinding mechanisms are symmetrically arranged on both sides of the power unit and are respectively used to synchronously grind two coaxial brake discs; each set of grinding mechanisms includes two sets of grinding assemblies, the two sets of grinding assemblies are symmetrically arranged on both sides of the brake disc and are respectively used to grind the inner side and outer side of the brake disc; The invention is characterized in that: the grinding assembly includes a grinding disc with an annular structure, an airbag with an annular structure, a limiting disc with an annular structure, a mounting tube and a plurality of limiting bolts; the tail end of the mounting tube is used to fix the grinding assembly; the limiting disc is fixedly sleeved on the outer circumferential surface of the head end of the mounting tube; the airbag is arranged between the limiting disc and the grinding disc; a plurality of through holes are formed on the limiting disc for a plurality of limiting bolts to pass through; the plurality of through holes are evenly arranged circumferentially; a plurality of channels corresponding to the plurality of through holes are formed on the airbag; a plurality of holes corresponding to the plurality of channels are formed on the back of the grinding disc Threaded hole; the screw of the limit bolt passes through the limit plate and the airbag through the through hole and the channel and is threadedly connected to the threaded hole on the back of the grinding disc, and a spring is sleeved on the screw between the limit plate and the nut of the limit bolt; the airbag is connected to the external inflation and deflation device; the external inflation and deflation device is used to inflate and deflate the airbag. After the airbag is inflated, it expands and pushes the grinding disc to move toward the brake disc and contact the brake disc. At this time, the grinding disc drives the limit bolt to compress the spring; the airbag shrinks after being deflated, and the spring releases the elastic force to cause the limit bolt to pull the grinding disc to move away from the brake disc and disengage from the brake disc.

2. The synchronous grinding device for two coaxial brake discs of a car according to claim 1, characterized in that: Grooves for limiting the position of the airbag are respectively formed on the opposite surfaces of the grinding disc and the limiting disc.

3. The synchronous grinding device for two coaxial brake discs of a car according to claim 1, characterized in that: The mounting tube of the grinding assembly located on the inner side of the brake disc is connected to the outer casing of the power unit, and the output shaft of the power unit passes through the mounting tube of the grinding assembly located on the inner side of the brake disc. A disc is provided at the end of the output shaft of the power unit, and a stud corresponding to the mounting hole of the brake disc is provided on the front side of the disc. The brake disc is mounted on the disc through the stud, and a nut is threaded on the stud to lock the brake disc; the diameter of the disc and the diameter of the brake disc boss are both smaller than the inner ring diameter of the annular structure grinding disc.

4. The synchronous grinding device for two coaxial brake discs of an automobile according to claim 1, characterized in that: Each grinding mechanism also includes a linear displacement device, which is arranged on the outside of the brake disc. The grinding assembly located on the outside of the brake disc is connected to the linear displacement device, and the linear displacement device is used to drive the grinding assembly located on the outside of the brake disc to move toward the brake disc or away from the brake disc.

5. The synchronous grinding device for two coaxial brake discs of a car according to claim 1, characterized in that: At least one threaded hole on the grinding disc passes through the grinding disc, and at least one limiting bolt in the grinding assembly is a hollow tube structure. The limiting bolt of the hollow tube structure is threadedly connected to the threaded hole passing through the grinding disc, and the nut opening of the limiting bolt of the hollow tube structure is connected to the external water supply pipeline.

6. The synchronous grinding device for two coaxial brake discs of a car according to claim 5, characterized in that: An arc-shaped groove is formed on the front of the grinding disc, and the arc-shaped groove is connected to the threaded hole penetrating the grinding disc. The opening of the screw end of the limiting bolt of the hollow tube structure is located at the inner bottom of the arc-shaped groove.

7. The synchronous grinding device for two coaxial brake discs of a car according to claim 1, characterized in that: Each grinding mechanism further includes an outer circumference grinding assembly, which is used to grind the outer circumference surface of the brake disc.

8. The synchronous grinding device for two coaxial brake discs of an automobile according to claim 7, characterized in that: The outer circumference grinding assembly includes a box body, a motor, an arc-shaped action rod, an arc-shaped action plate and sandpaper; the motor is arranged inside the box body, and an opening is formed on the top of the box body. One end of the arc-shaped action rod extends into the box body and is connected to the output shaft of the motor, and the other end of the arc-shaped action rod extends out of the box body and is hinged to the outer arc surface of the arc-shaped action plate. The inner arc surface of the arc-shaped action plate faces the outer circumference of the brake disc, and the sandpaper is arranged on the inner arc surface of the arc-shaped action plate; the motor drives the arc-shaped action rod to rotate, so that the arc-shaped action rod drives the arc-shaped action plate to move toward the outer circumference of the brake disc and causes the sandpaper to grind the outer circumference of the brake disc, or causes the arc-shaped action rod to drive the arc-shaped action plate to move away from the outer circumference of the brake disc and causes the sandpaper to stop grinding the outer circumference of the brake disc.

9. The synchronous grinding device for two coaxial brake discs of a car according to claim 8, characterized in that: A flexible material is arranged between the sandpaper and the inner arc surface of the arc-shaped action plate.

Images