Floating tool for brake disc

Abstract

The invention relates to the technical field of brake disc clamping and grinding, in particular to a floating tool for a brake disc, which comprises a main body plate, a clamping floating mechanism for clamping the brake disc and driving the brake disc to move and rotate is arranged at the upper end of the main body plate, and the clamping floating mechanism comprises a first limiting groove formed in the upper end of the main body plate; a first limiting body is in sliding fit in the first limiting groove, a second motor is fixedly connected to the upper end of the first limiting body, a supporting mechanism for temporarily supporting and limiting the brake disc is arranged at the upper end of the main body plate, and a grinding mechanism for grinding the surface of the brake disc is arranged at the upper end of the main body plate. And rotation of a fifth motor is controlled according to a pressure sensor on the surface of a polishing air bag, so that the rotating polishing air bag polishes the flow guide groove at a certain angle, and the smoothness in the flow guide groove in the side face of the brake disc can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of brake disc clamping and grinding, and in particular to a floating tooling for a brake disc. Background Art

[0002] The brake disc is one of the key components in the automobile braking system. It is mainly used to slow down or stop the vehicle through friction. The brake disc generally includes an inner fixing mechanism and an outer disc mechanism. When the driver steps on the brake pedal, the brake caliper clamps the outer disc mechanism of the brake disc, and the brake pads produce friction with the surface of the brake disc, thereby converting the vehicle's kinetic energy into heat energy, slowing down or stopping the vehicle. The material of the brake disc is generally metal. In order to ensure that the brake disc does not rust during storage, after the brake disc is cast, a number of parabolic guide grooves are first opened on the end face of the brake disc according to the performance requirements of the brake disc. Then the surface of the brake disc needs to be polished and then sprayed with anti-rust paint.

[0003] When the existing device is used to grind the brake disc, the end face of the brake disc needs to be fixed first, and then the side of the brake disc is grinded. After the side grinding is completed, the side of the brake disc is fixed by a fixing mechanism, and then the end face of the brake disc is grinded again, and finally the guide groove on the side of the brake disc is manually grinded. This grinding method is very inefficient. When grinding the side of the brake disc, the end face of the brake disc needs to be fixed, and the end face of the brake pad may be rusted, which reduces the stability of the brake disc. In the prior art, the guide groove on the surface of the brake disc is grinded by a manual handheld grinding mechanism, and the grinding efficiency is very low, and it cannot be guaranteed that the grinding mechanism and the inner side of the guide groove are ground at a certain angle, which reduces the heat dissipation and diversion effect of the guide groove. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a floating fixture for a brake disc.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a floating tool for a brake disc, comprising a main body plate, the upper end of the main body plate is provided with a clamping floating mechanism for clamping the brake disc and driving it to move and rotate, the clamping floating mechanism comprises a first limiting groove opened at the upper end of the main body plate, a first limiting body is slidably fitted in the first limiting groove, the upper end of the first limiting body is fixedly connected to a second motor, a second electric telescopic rod is fixedly connected to a transmission shaft end of the second motor, the telescopic end of the second electric telescopic rod is fixedly connected to a support body, a rotating groove is opened at the upper end of the support body, a connecting body is rotatably arranged in the rotating groove, a supporting mechanism for temporarily supporting and limiting the brake disc is provided at the upper end of the main body plate, and a grinding mechanism for grinding the surface of the brake disc is provided at the upper end of the main body plate.

[0006] Preferably, a fourth motor is fixedly connected to the side of the support body, a rotating rod is rotatably arranged in a rotating groove of the support body, the rotating rod is fixedly connected to the connecting body, the transmission shaft end of the fourth motor is fixedly connected to the rotating rod, and the upper end of the connecting body is fixedly connected to the fourth fixed body.

[0007] Preferably, the upper end of the fourth fixed body is fixedly connected to the first motor, the transmission shaft end of the first motor is fixedly connected to the second fixed body, the upper end of the second fixed body is provided with a third placement groove, the third placement groove is fixedly connected to the fourth electric telescopic rod, the telescopic end of the fourth electric telescopic rod is fixedly connected to the third fixed body, and the side surface of the third fixed body is provided with a plurality of fourth placement grooves arranged at equal angles, a plurality of fifth electric telescopic rods are respectively fixedly connected to the fourth placement grooves, and a plurality of telescopic ends of the fifth electric telescopic rods are respectively fixedly connected to baffles.

[0008] Preferably, a second placement groove is opened at the upper end of the second fixed body, and a plurality of third electric telescopic rods are fixedly connected in the second placement groove, and the telescopic ends of the plurality of third electric telescopic rods are fixedly connected with a grinding ring that slides with the second placement groove, and a support pad is fixedly connected to the upper end of the second fixed body.

[0009] Preferably, a third motor is fixedly connected in the first limiting groove, a first threaded rod is fixedly connected to the transmission shaft end of the third motor, and a side surface of the first threaded rod is threadedly matched with the first limiting body.

[0010] Preferably, the grinding mechanism includes a sixth electric telescopic rod fixedly arranged on the upper end of the main body plate, the telescopic end of the sixth electric telescopic rod is fixedly connected to the fifth fixed body, the lower end of the fifth fixed body is provided with an arc-shaped cavity, a rotating body is rotatably arranged in the cavity, the lower end of the rotating body is provided with a second limiting groove, two second limiting bodies are slidably arranged in the second limiting groove, the lower ends of the two second limiting bodies are respectively fixedly connected to the seventh electric telescopic rod, the telescopic ends of the two seventh electric telescopic rods are respectively fixedly connected to the seventh motor, one of the transmission shaft ends of the seventh motor is fixedly connected to the grinding plate, and the other transmission shaft end of the seventh motor is fixedly connected to the grinding airbag.

[0011] Preferably, a fifth motor is fixedly connected to the side of the fifth fixed body, a transmission shaft end of the fifth motor is fixedly connected to the side of the rotating body, a sixth motor is fixedly connected in the second limiting groove, a second threaded rod is fixedly connected to the transmission shaft end of the sixth motor, the sides of the second threaded rod are respectively threadedly matched with two second limiting bodies, and a number of pressure sensors are arranged on the sides of the grinding plate and the grinding airbag.

[0012] Preferably, the supporting mechanism includes two first placement grooves symmetrically opened at the upper end of the main body plate, the two first placement grooves are respectively fixedly connected with the first electric telescopic rods, the telescopic ends of the two first electric telescopic rods are respectively fixedly connected with the first fixing bodies, the upper ends of the two first fixing bodies are respectively provided with empty grooves, the two first fixing bodies are fixedly connected with support plates, the two support plates are fixedly connected with air pumps, the lower ends of the two first fixing bodies are penetrated by a plurality of through holes, the upper ends of the two first fixing bodies are respectively provided with guide grooves, and the two guide grooves are respectively fixedly connected with flexible rings.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The fourth electric telescopic rod is extended, so that the telescopic end of the fourth electric telescopic rod passes through the mounting hole of the brake disc, ensuring that the baffle on the side of the third fixed body contacts the upper end surface of the brake disc, and then the first motor drives the second fixed body to rotate. The baffle on the side of the third fixed body is a frosted structure, which can grind the position of the upper end surface of the brake disc near the mounting hole. Then the fourth electric telescopic rod is retracted, and the third electric telescopic rod is extended at the same time. At this time, the third motor drives the second fixed body to move, so as to grind the lower end surface of the brake disc, and then the fourth electric telescopic rod is extended again, so that the lower end surface of the baffle contacts the upper end surface of the brake disc, and the support pad on the upper end surface of the second fixed body contacts the lower end surface of the brake disc, so as to stably fix the brake disc of any shape and size, which is very practical and prevents the end surface of the brake disc from rusting, causing the device to fail to stably fix the brake disc; 2. The first motor drives the brake disc to rotate, and at the same time the seventh electric telescopic rod extends, the seventh motor starts, and drives the grinding plate to grind one end surface of the brake disc. At the same time, the sixth motor drives the second threaded rod to rotate, and the second threaded rod cooperates to drive the second limiter to move, so that the grinding plate can completely grind this end surface of the brake disc. Then the fourth motor drives the brake disc to move to a position where the end surface is perpendicular to the end surface of the grinding plate. At this time, the seventh electric telescopic rod extends, and the seventh motor drives the grinding plate to grind the side of the brake disc, which can quickly grind one end surface and side surface of the brake disc, thereby improving the grinding efficiency. 3. The seventh electric telescopic rod is extended, so that the seventh motor drives the grinding airbag to rotate, and the rotating grinding airbag grinds the guide groove of the brake disc. At the same time, the rotation of the fifth motor is controlled according to the pressure sensor on the surface of the grinding airbag, so that the rotating grinding airbag grinds the guide groove at a certain angle to the guide groove, which can ensure the smoothness of the guide groove on the side of the brake disc and improve the overall diversion and heat dissipation capacity of the brake pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention is a sectional view of the whole Figure 1 ; Figure 3 The present invention is a sectional view of the whole Figure 2 ; Figure 4 The present invention is a sectional view of the whole Figure 3 ; Figure 5 The present invention is a sectional view of the whole Figure 4 ; Figure 6 For the present invention Figure 2 A magnified image of point A; Figure 7 For the present invention Figure 2 The enlarged view of point B; Figure 8 For the present invention Figure 2 Enlarged view of point C; Fig. 9 For the present invention Figure 2 The enlarged view of point D; Fig.10 For the present invention Figure 4 Enlarged view of point E.

[0015] 1. Main plate; 2. Support mechanism; 3. Clamping floating mechanism; 4. Grinding mechanism; 21. First placement slot; 22. First electric telescopic rod; 23. First fixed body; 24. Flexible ring; 25. Empty slot; 26. Guide slot; 27. Through hole; 28. Support plate; 29. ​​Air pump; 31. First limit slot; 32. First threaded rod; 33. Second electric telescopic rod; 34. Second fixed body; 35. Second placement slot; 36. Third electric telescopic rod; 37. Grinding ring; 38. Support pad; 39. Third placement slot; 310. Fourth electric telescopic rod; 311. Third fixed body; 312. Fourth placement slot; 313. Stop Plate; 314, the fifth electric telescopic rod; 315, the fourth fixed body; 316, the first motor; 317, the first limiting body; 318, the second motor; 319, the third motor; 320, the supporting body; 321, the rotating groove; 322, the connecting body; 323, the rotating rod; 324, the fourth motor; 41, the sixth electric telescopic rod; 42, the fifth fixed body; 43, the fifth motor; 44, the cavity; 45, the rotating body; 46, the sixth motor; 47, the second threaded rod; 48, the second limiting groove; 49, the second limiting body; 410, the seventh electric telescopic rod; 411, the seventh motor; 412, the polishing plate; 413, the polishing airbag. DETAILED DESCRIPTION

[0016] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0017] See also Figure 1-Figure 10A floating fixture for a brake disc comprises a main body plate 1, and a clamping floating mechanism 3 for clamping the brake disc and driving the brake disc to move and rotate is arranged at the upper end of the main body plate 1.

[0018] In this embodiment, the clamping floating mechanism 3 includes a first limiting groove 31 opened at the upper end of the main plate 1, and a first limiting body 317 is slidably fitted in the first limiting groove 31. The upper end of the first limiting body 317 is fixedly connected to a second motor 318, and the transmission shaft end of the second motor 318 is fixedly connected to a second electric telescopic rod 33. The telescopic end of the second electric telescopic rod 33 is fixedly connected to a support body 320. A rotating groove 321 is opened at the upper end of the support body 320, and a connecting body 322 is rotatably arranged in the rotating groove 321.

[0019] A fourth motor 324 is fixedly connected to the side of the support body 320, and a rotating rod 323 is rotatably arranged in the rotating groove 321 of the support body 320. The rotating rod 323 is fixedly connected to the connecting body 322, and the transmission shaft end of the fourth motor 324 is fixedly connected to the rotating rod 323. The upper end of the connecting body 322 is fixedly connected to the fourth fixed body 315.

[0020] The upper end of the fourth fixed body 315 is fixedly connected to the first motor 316, the transmission shaft end of the first motor 316 is fixedly connected to the second fixed body 34, the upper end of the second fixed body 34 is provided with a third placement groove 39, the third placement groove 39 is fixedly connected to the fourth electric telescopic rod 310, the telescopic end of the fourth electric telescopic rod 310 is fixedly connected to the third fixed body 311, and the side of the third fixed body 311 is provided with a plurality of fourth placement grooves 312 arranged at equal angles, a plurality of the fourth placement grooves 312 are respectively fixedly connected to the fifth electric telescopic rods 314, and the telescopic ends of a plurality of the fifth electric telescopic rods 314 are respectively fixedly connected to baffles 313.

[0021] A second placement groove 35 is opened at the upper end of the second fixed body 34, and a plurality of third electric telescopic rods 36 are fixedly connected in the second placement groove 35. The telescopic ends of the plurality of third electric telescopic rods 36 are fixedly connected with a grinding ring 37 that slidably cooperates with the second placement groove 35. A support pad 38 is fixedly connected to the upper end of the second fixed body 34.

[0022] A third motor 319 is fixedly connected in the first limiting groove 31 , a first threaded rod 32 is fixedly connected to a transmission shaft end of the third motor 319 , and a side surface of the first threaded rod 32 is threadedly matched with the first limiting body 317 .

[0023] Specifically, the fourth motor 324 drives the connecting body 322 to rotate, and the connecting body 322 controls the rotation of the second fixed body 34 to ensure that the brake disc is placed horizontally. Then the first motor 316 drives the brake disc to rotate, and at the same time the seventh electric telescopic rod 410 extends, and the seventh motor 411 starts, driving the grinding plate 412 to grind one end surface of the brake disc. At the same time, the sixth motor 46 drives the second threaded rod 47 to rotate, and the second threaded rod 47 cooperates to drive the second limiting body 49 to move, so that the grinding plate 412 can completely grind this end surface of the brake disc.

[0024] In this embodiment, a support mechanism 2 for temporarily supporting and limiting the brake disc is provided at the upper end of the main body plate 1 .

[0025] The support mechanism 2 includes two first placement grooves 21 symmetrically opened at the upper end of the main body plate 1, and the first electric telescopic rods 22 are fixedly connected to the two first placement grooves 21 respectively, and the telescopic ends of the two first electric telescopic rods 22 are fixedly connected to the first fixed bodies 23 respectively. The upper ends of the two first fixed bodies 23 are respectively provided with empty grooves 25, and the two first fixed bodies 23 are fixedly connected with support plates 28, and the two support plates 28 are fixedly connected with air pumps 29. The lower ends of the two first fixed bodies 23 are penetrated by a plurality of through holes 27, and the upper ends of the two first fixed bodies 23 are respectively provided with guide grooves 26, and the two guide grooves 26 are respectively fixedly connected with flexible rings 24.

[0026] Specifically, the worker places the brake disc on the first fixed body 23 at the telescopic ends of the two first electric telescopic rods 22, and then starts the two air pumps 29 at the same time. The air pump 29 reduces the pressure in the area between the support plate 28 and the brake pad, so that the first fixed body 23 can firmly fix the brake disc.

[0027] In this embodiment, a grinding mechanism 4 for grinding the surface of the brake disc is disposed at the upper end of the main body plate 1 .

[0028] The grinding mechanism 4 includes a sixth electric telescopic rod 41 fixedly arranged on the upper end of the main body plate 1, the telescopic end of the sixth electric telescopic rod 41 is fixedly connected to the fifth fixed body 42, the lower end of the fifth fixed body 42 is provided with an arc-shaped cavity 44, a rotating body 45 is rotatably arranged in the cavity 44, and a second limiting groove 48 is opened at the lower end of the rotating body 45, and two second limiting bodies 49 are slidably arranged in the second limiting groove 48, and the lower ends of the two second limiting bodies 49 are respectively fixedly connected to the seventh electric telescopic rod 410, and the telescopic ends of the two seventh electric telescopic rods 410 are respectively fixedly connected to the seventh motor 411, and the transmission shaft end of one of the seventh motors 411 is fixedly connected to the grinding plate 412, and the transmission shaft end of the other seventh motor 411 is fixedly connected to the grinding airbag 413.

[0029] A fifth motor 43 is fixedly connected to the side of the fifth fixed body 42, a transmission shaft end of the fifth motor 43 is fixedly connected to the side of the rotating body 45, a sixth motor 46 is fixedly connected in the second limiting groove 48, a second threaded rod 47 is fixedly connected to the transmission shaft end of the sixth motor 46, and the sides of the second threaded rod 47 are respectively arranged with two second limiting bodies 49 through threaded cooperation, and a number of pressure sensors are arranged on the sides of the grinding plate 412 and the grinding airbag 413.

[0030] Specifically, the seventh motor 411 is started, driving the grinding plate 412 to grind one end surface of the brake disc, and at the same time the sixth motor 46 drives the second threaded rod 47 to rotate, and the second threaded rod 47 cooperates to drive the second limiting body 49 to move, so that the grinding plate 412 can completely grind this end surface of the brake disc, and then the fourth motor 324 drives the brake disc to move to a position where the end surface is perpendicular to the end surface of the grinding plate 412. At this time, the seventh electric telescopic rod 410 is extended, and the seventh motor 411 drives the grinding plate 412 to grind the side of the brake disc.

[0031] When in use, the main body plate 1 is placed on the machine tool and fixed, and then the third motor 319 is started. The third motor 319 drives the first threaded rod 32 to rotate, and the first threaded rod 32 cooperates to drive the first limiting body 317 to move along the first limiting groove 31 until the first limiting body 317 moves between the two first electric telescopic rods 22. At this time, the two first electric telescopic rods 22 are in an extended state. The worker places the brake disc on the first fixed body 23 at the telescopic ends of the two first electric telescopic rods 22, and then starts the two air pumps 29 at the same time. The air pump 29 reduces the pressure in the area between the support plate 28 and the brake pad, so that the first fixed body 23 can firmly fix the brake disc, and then the second electric telescopic rod 33 is extended, driving the upper end of the second fixed body 34 to contact the lower end surface of the brake disc, and at the same time, the fourth electric telescopic rod 310 is extended, so that the fourth electric telescopic rod 310 is telescopic The end portion passes through the mounting hole of the brake disc to ensure that the baffle 313 on the side of the third fixed body 311 contacts the upper end surface of the brake disc, and then the first motor 316 drives the second fixed body 34 to rotate. The baffle 313 on the side of the third fixed body 311 is a frosted structure, which can grind the upper end surface of the brake disc near the mounting hole. Then the fourth electric telescopic rod 310 contracts and the third electric telescopic rod 36 extends. At this time, the third motor 319 drives the second fixed body 34 to move, thereby grinding the lower end surface of the brake disc. Then the fourth electric telescopic rod 310 extends again, so that the lower end surface of the baffle 313 contacts the upper end surface of the brake disc, and the support pad 38 on the upper end surface of the second fixed body 34 contacts the lower end surface of the brake disc, thereby stably fixing the brake disc of any shape and size, which is very practical and prevents the end surface of the brake disc from rusting, causing the device to fail to stably fix the brake disc.

[0032] Afterwards, the third motor 319 drives the first limiting body 317 to move to the bottom of the grinding mechanism 4. First, the fourth motor 324 drives the connecting body 322 to rotate, and the connecting body 322 controls the rotation of the second fixed body 34 to ensure that the brake disc is placed horizontally. Then, the first motor 316 drives the brake disc to rotate, and at the same time, the seventh electric telescopic rod 410 extends, and the seventh motor 411 is started, driving the grinding plate 412 to grind one end surface of the brake disc. At the same time, the sixth motor 46 drives the second threaded rod 47 to rotate, and the second threaded rod 47 cooperates to drive the second limiting body 49 to move, so that the grinding plate 412 can completely grind this end surface of the brake disc. Then, the fourth motor 324 drives the brake disc to move to a position where the end surface is perpendicular to the end surface of the grinding plate 412. At this time, the seventh electric telescopic rod 410 extends, and the seventh motor 411 drives the grinding plate 412 to grind the side of the brake disc, so that one end surface and side surface of the brake disc can be quickly polished, thereby improving the grinding efficiency.

[0033] Afterwards, the fourth motor 324 drives the brake disc to rotate to a position where the end face with the guide groove is horizontal, and then the fifth motor 43 drives the rotating body 45 to rotate, and at the same time the seventh electric telescopic rod 410 extends, so that the seventh motor 411 drives the polishing airbag 413 to rotate, and the rotating polishing airbag 413 polishes the guide groove of the brake disc. At the same time, the rotation of the fifth motor 43 is controlled according to the pressure sensor on the surface of the polishing airbag 413, so that the rotating polishing airbag 413 polishes it at a certain angle to the guide groove, which can ensure the smoothness of the guide groove on the side of the brake disc and improve the overall guide and heat dissipation capacity of the brake pad.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A floating fixture for a brake disc, comprising a main plate (1), characterized in that: The upper end of the main body plate (1) is provided with a clamping floating mechanism (3) for clamping the brake disc and driving the brake disc to move and rotate. The clamping floating mechanism (3) comprises a first limiting groove (31) provided at the upper end of the main body plate (1). A first limiting body (317) is slidably fitted in the first limiting groove (31). The upper end of the first limiting body (317) is fixedly connected to a second motor (318). The transmission shaft end of the second motor (318) is fixedly connected to a second electric telescopic rod (33). The telescopic end of the second electric telescopic rod (33) is fixedly connected to a support body (320). A rotation groove (321) is provided at the upper end of the support body (320). A connecting body (322) is rotatably provided in the rotation groove (321). The upper end of the main body plate (1) is provided with a supporting mechanism (2) for temporarily supporting and limiting the brake disc. The upper end of the main body plate (1) is provided with a grinding mechanism (4) for grinding the surface of the brake disc.

2. A floating fixture for a brake disc according to claim 1, characterized in that: A fourth motor (324) is fixedly connected to the side of the support body (320); a rotating rod (323) is rotatably arranged on the support body (320) in the rotating groove (321); the rotating rod (323) is fixedly connected to the connecting body (322); a transmission shaft end of the fourth motor (324) is fixedly connected to the rotating rod (323); and a fourth fixed body (315) is fixedly connected to the upper end of the connecting body (322).

3. A floating fixture for a brake disc according to claim 2, characterized in that: The upper end of the fourth fixed body (315) is fixedly connected to a first motor (316), the transmission shaft end of the first motor (316) is fixedly connected to a second fixed body (34), the upper end of the second fixed body (34) is provided with a third placement groove (39), a fourth electric telescopic rod (310) is fixedly connected in the third placement groove (39), the telescopic end of the fourth electric telescopic rod (310) is fixedly connected to the third fixed body (311), a plurality of fourth placement grooves (312) arranged at equal angles are provided on the side surface of the third fixed body (311), a plurality of the fourth placement grooves (312) are respectively fixedly connected to fifth electric telescopic rods (314), and a plurality of the telescopic ends of the fifth electric telescopic rods (314) are respectively fixedly connected to baffles (313).

4. A floating fixture for a brake disc according to claim 3, characterized in that: A second placement groove (35) is formed at the upper end of the second fixed body (34), a plurality of third electric telescopic rods (36) are fixedly connected in the second placement groove (35), the telescopic ends of the plurality of third electric telescopic rods (36) are fixedly connected to a grinding ring (37) that slidably cooperates with the second placement groove (35), and a support pad (38) is fixedly connected to the upper end of the second fixed body (34).

5. The floating fixture for a brake disc according to claim 1, characterized in that: A third motor (319) is fixedly connected in the first limiting groove (31), a transmission shaft end of the third motor (319) is fixedly connected to a first threaded rod (32), and a side surface of the first threaded rod (32) is threadedly matched with the first limiting body (317).

6. The floating fixture for a brake disc according to claim 1, characterized in that: The grinding mechanism (4) comprises a sixth electric telescopic rod (41) fixedly arranged at the upper end of the main body plate (1); the telescopic end of the sixth electric telescopic rod (41) is fixedly connected to a fifth fixed body (42); the lower end of the fifth fixed body (42) is provided with an arc-shaped cavity (44); a rotating body (45) is rotatably arranged in the cavity (44); the lower end of the rotating body (45) is provided with a second limiting groove (48); two second limiting bodies (49) are slidably arranged in the second limiting groove (48); the lower ends of the two second limiting bodies (49) are respectively fixedly connected to a seventh electric telescopic rod (410); the telescopic ends of the two seventh electric telescopic rods (410) are respectively fixedly connected to a seventh motor (411); the transmission shaft end of one of the seventh motors (411) is fixedly connected to a grinding plate (412); and the transmission shaft end of the other seventh motor (411) is fixedly connected to a grinding airbag (413).

7. A floating fixture for a brake disc according to claim 6, characterized in that: A fifth motor (43) is fixedly connected to the side of the fifth fixed body (42), a transmission shaft end of the fifth motor (43) is fixedly connected to the side of the rotating body (45), a sixth motor (46) is fixedly connected in the second limiting groove (48), a second threaded rod (47) is fixedly connected to the transmission shaft end of the sixth motor (46), the side of the second threaded rod (47) is respectively arranged with two second limiting bodies (49) by means of threads, and a plurality of pressure sensors are arranged on the side of the grinding plate (412) and the grinding airbag (413).

8. The floating fixture for a brake disc according to claim 1, characterized in that: The support mechanism (2) comprises two first placement grooves (21) symmetrically arranged at the upper end of the main body plate (1), the two first placement grooves (21) are respectively fixedly connected with a first electric telescopic rod (22), the telescopic ends of the two first electric telescopic rods (22) are respectively fixedly connected with a first fixing body (23), the upper ends of the two first fixing bodies (23) are respectively provided with an empty groove (25), the two first fixing bodies (23) are respectively fixedly connected with a support plate (28), the two support plates (28) are respectively fixedly connected with an air pump (29), the lower ends of the two first fixing bodies (23) are penetrated with a plurality of through holes (27), the upper ends of the two first fixing bodies (23) are respectively provided with a guide groove (26), and the two guide grooves (26) are respectively fixedly connected with a flexible ring (24).

Images