CN-121993520-A - Electromechanical brake caliper, brake system and vehicle

Abstract

The present disclosure relates to an electromechanical brake caliper, a brake system, and a vehicle, the electromechanical brake caliper including a caliper body; the brake block is arranged on the caliper body, the driving module is arranged on the caliper body and comprises at least one driving part, a transmission mechanism, at least one speed reducing mechanism and at least one piston assembly, the driving part is in transmission connection with the speed reducing mechanism through the transmission mechanism, the speed reducing mechanism is in one-to-one correspondence with the piston assemblies, the speed reducing mechanism is in transmission connection with the corresponding piston assemblies, and the piston assemblies can move along a first direction to abut against and drive the brake block to move. By arranging at least one piston assembly, braking force can be uniformly distributed, abrasion of the brake pad is reduced, and the brake pad with larger area can be adapted, so that braking capacity and braking efficiency of the electromechanical brake caliper are improved.

Inventors

• YANG LEI
• YANG DEQIANG
• XU JIE
• PEI JINHUA

Assignees

• 小米汽车科技有限公司

Dates

Publication Date

20260508

Application Date

20241106

Claims (20)

1. 1. An electromechanical brake caliper, characterized in that it comprises: A caliper body; The brake pad is arranged on the caliper body; The driving module is arranged on the caliper body; The driving module comprises at least one driving part, a transmission mechanism, at least one speed reducing mechanism and at least one piston assembly, The driving part is in transmission connection with the speed reducing mechanism through the transmission mechanism, the speed reducing mechanism is arranged in one-to-one correspondence with the piston assemblies, and the speed reducing mechanism is in transmission connection with the corresponding piston assemblies; The piston assembly can move along a first direction so as to abut against and drive the brake pad to move.
2. 2. The electromechanical brake caliper according to claim 1, wherein the transmission mechanism includes at least one input gear and at least one intermediate gear; The input gears are in one-to-one corresponding transmission connection with the driving parts, and the intermediate gears are meshed with the input gears; The intermediate gear is in transmission connection with the speed reducing mechanism.
3. 3. The electromechanical brake caliper according to claim 2, wherein the drive portion, the input gear, the reduction mechanism, and the piston assembly are all provided one, and the input gear is drivingly connected to the reduction mechanism through at least one of the intermediate gears, or The driving part and the input gear are arranged in one, the speed reducing mechanism and the piston assembly are arranged in two, wherein the input gear is in transmission connection with the two piston assemblies through at least one intermediate gear, or The driving part, the input gear, the speed reducing mechanism and the piston assembly are all arranged in two, and the two input gears are in transmission connection with the two speed reducing mechanisms through at least one intermediate gear, or The driving part and the input gears are arranged in two, the speed reducing mechanism and the piston assembly are arranged in three, and the two input gears are in transmission connection with the three speed reducing mechanisms through at least one intermediate gear.
4. 4. An electromechanical brake calliper according to claim 3, wherein both said drive parts comprise a first drive part and a second drive part; the two input gears comprise a first input gear and a second input gear; At least one of the intermediate gears comprises a first intermediate gear in driving connection with the first input gear and a second intermediate gear in driving connection with the second input gear; The three reduction mechanisms comprise a first reduction mechanism, a second reduction mechanism and a third reduction mechanism, and the three piston assemblies comprise a first piston assembly, a second piston assembly and a third piston assembly; The first input gear is in transmission connection with the first driving part, the second input gear is in transmission connection with the second driving part, the first speed reducing mechanism and the second speed reducing mechanism are in transmission connection with the first intermediate gear, and the second speed reducing mechanism and the third speed reducing mechanism are in transmission connection with the second intermediate gear.
5. 5. Electromechanical brake calliper according to any of the claims 2-4, characterised in that the reduction mechanism comprises a drivingly connected output gear and planetary gear assembly; The output gear is in transmission connection with the intermediate gear, and the planetary gear assembly is in transmission connection with the piston assembly.
6. 6. The electromechanical brake caliper according to claim 5, wherein a diameter of the output gear is greater than a diameter of the intermediate gear.
7. 7. The electromechanical brake caliper according to claim 5, wherein the planetary gear assembly includes a sun gear, a planet gear, a ring gear, and a planet carrier; The sun gear is in transmission connection with the output gear, the planet gears are arranged on the planet carrier and in transmission connection with the sun gear, the gear ring is fixedly arranged and meshed with the planet gears, and the planet carrier is used for being in transmission connection with the piston assembly.
8. 8. The electromechanical brake caliper according to claim 7, wherein the carrier is configured as a disc plate rotatably disposed within the ring gear; the disc plate comprises a disc plate body and a planet gear shaft, the planet gear shaft is arranged on the disc plate body, and the planet gear is rotatably sleeved on the planet gear shaft; The center of the disc plate is provided with a gear hole, and the gear hole is used for being in transmission connection with the piston assembly.
9. 9. The electromechanical brake caliper according to claim 4, wherein the caliper body is provided with a first beam, a second beam, and a third beam, each of which extends in the first direction and is disposed at intervals in the second direction; A first accommodating groove is formed between the first beam body and the second beam body, a second accommodating groove is formed between the second beam body and the third beam body, the first driving part is arranged in the first accommodating groove, and the second driving part is arranged in the second accommodating groove; The first beam body, the second beam body and the third beam body are respectively provided with a piston cavity penetrating along the first direction, and the piston assemblies are arranged in the piston cavities in a one-to-one correspondence manner; Wherein the first direction and the second direction are arranged in an intersecting manner.
10. 10. The electromechanical brake caliper according to claim 9, wherein the caliper body is further provided with a first and a second hollowed out groove; The first hollowed-out groove is formed in one side, away from the first accommodating groove, of the first beam body in the second direction, and the second hollowed-out groove is formed in one side, away from the second accommodating groove, of the third beam body in the second direction; the first beam body and the third beam body are symmetrically arranged relative to the second beam body, the first accommodating groove and the second accommodating groove are symmetrically arranged relative to the second beam body, and the first hollowed-out groove and the second hollowed-out groove are symmetrically arranged relative to the second beam body.
11. 11. Electromechanical brake calliper according to any of the claims 1-4, wherein the piston assembly comprises a lead screw nut assembly comprising a drive screw and a drive nut; The driving screw rod is arranged in an extending mode along the first direction and in transmission connection with the speed reducing mechanism, and the driving screw rod is axially locked and circumferentially rotatably arranged; The driving nut is locked in the circumferential direction and is sleeved on the driving screw in an axially movable mode, and the driving nut is used for abutting and driving the brake pad to move.
12. 12. The electromechanical brake caliper according to claim 11, wherein said lead screw nut assembly further includes a piston sleeve connected to said drive nut and adapted to abut said brake pad; Wherein the piston sleeve and the drive nut are integrally formed, or The piston sleeve is sleeved on the driving nut, a first spherical surface is formed on the end surface of the driving nut, a second spherical surface is formed on the inner wall of the piston sleeve, and the first spherical surface and the second spherical surface form spherical surface matching, or The piston sleeve is positioned at one side of the driving nut along the first direction, and the piston sleeve is connected with the driving nut in a spherical hinge mode.
13. 13. The electromechanical brake caliper according to claim 11, wherein the drive screw includes a polish rod segment, a stop flange, a screw segment, and a connecting gear; The polish rod section and the screw rod section are arranged in an extending mode along the first direction, and the stop flange is connected between the polish rod section and the screw rod section; The driving nut is sleeved on the screw section and can be used for propping against the stop flange; The connecting gear is connected to one end of the polish rod section, which is far away from the stop flange, and is used for being in transmission connection with the speed reducing mechanism.
14. 14. The electromechanical brake caliper according to claim 1, wherein the drive module further includes an adapter plate; The adapter plate is arranged between the brake pad and the piston assembly; The area of the adapter plate, which is abutted with the brake pad, is a first area, the area of the piston assembly, which is abutted with the adapter plate, is a second area, and the first area is larger than the second area.
15. 15. The electromechanical brake caliper according to claim 14, wherein the adapter plate includes first and second sides disposed opposite in the first direction; the first side surface is concavely provided with at least one groove, the grooves are arranged in one-to-one correspondence with the piston assemblies, and the grooves are used for the corresponding piston assemblies to be inserted; the first side surface is fixedly connected with the piston assembly, or the second side surface is fixedly connected with the brake pad.
16. 16. Electromechanical brake calliper according to claim 15, wherein the end of the piston sleeve of the piston assembly is formed with a first plane, the inner wall of the recess is formed with a second plane, the first plane being intended to abut with the second plane, and/or, The end part of the piston sleeve of the piston assembly is provided with a first arc-shaped surface, the inner wall of the groove is provided with a second arc-shaped surface, and the first arc-shaped surface is used for being abutted with the second arc-shaped surface.
17. 17. The electromechanical brake caliper according to any one of claims 1 to 4, wherein the drive module further includes a module housing detachably provided to the caliper body, the transmission mechanism and the reduction mechanism being provided in the module housing.
18. 18. The electromechanical brake caliper according to claim 17, wherein the caliper body is internally provided with at least one piston cavity penetrating in the first direction, the piston cavities being provided in one-to-one correspondence with the piston assemblies, the piston assemblies being provided in the corresponding piston cavities; The caliper body is concavely provided with at least one accommodating groove, the accommodating groove is arranged corresponding to the driving part, and the driving part is arranged in the corresponding accommodating groove; the module shell is provided with at least one driving opening and at least one piston opening, the driving opening is arranged corresponding to the accommodating groove and is arranged opposite to the accommodating groove in the first direction, and the piston opening is arranged corresponding to the piston cavity and is arranged opposite to the piston cavity in the first direction.
19. 19. A brake system, characterized in that it comprises an electromechanical brake calliper according to any of the claims 1-18.
20. 20. A vehicle comprising an electromechanical brake calliper according to any of claims 1-18 or a brake system according to claim 19.

Description

Electromechanical brake caliper, brake system and vehicle Technical Field The disclosure relates to the technical field of braking, in particular to an electromechanical brake caliper, a braking system and a vehicle. Background The brake system of a vehicle is a system that applies a certain braking force to wheels to forcibly brake the wheels to a certain extent. The brake control system functions to forcibly decelerate or even stop the traveling vehicle according to the requirements of the driver or the controller, or to stabilize the stopped vehicle under various road conditions (e.g., on a slope), or to stabilize the vehicle speed during downhill traveling. Because the traditional braking system adopts hydraulic braking, the hydraulic braking has the problems of complicated arrangement, slow response, low energy efficiency, high redundancy, high price and the like. Therefore, an electromechanical brake (Electronic Mechanical Braking, EMB) system appears, and the electromechanical brake system has various advantages of simple arrangement, quick response and the like, so that the requirements of rapid development of automobile technology can be met, and the requirements of electric development of automobiles can be particularly met. In the related art, a brake caliper of an electromechanical brake system often has a problem of insufficient braking capability. Disclosure of Invention To overcome the problems in the related art, the present disclosure provides an electromechanical brake caliper, a brake system, and a vehicle to solve the technical problems in the related art. According to a first aspect of the present disclosure, there is provided an electromechanical brake caliper comprising: A caliper body; The brake pad is arranged on the caliper body; The driving module is arranged on the caliper body; The driving module comprises at least one driving part, a transmission mechanism, at least one speed reducing mechanism and at least one piston assembly, The driving part is in transmission connection with the speed reducing mechanism through the transmission mechanism, the speed reducing mechanism is arranged in one-to-one correspondence with the piston assemblies, and the speed reducing mechanism is in transmission connection with the corresponding piston assemblies; The piston assembly can move along a first direction so as to abut against and drive the brake pad to move. In some embodiments, the transmission includes at least one input gear and at least one intermediate gear; The input gears are in one-to-one corresponding transmission connection with the driving parts, and the intermediate gears are meshed with the input gears; The intermediate gear is in transmission connection with the speed reducing mechanism. In some embodiments, the drive portion, the input gear, the reduction mechanism, and the piston assembly are all provided in one, the input gear is drivingly connected to the reduction mechanism through at least one of the intermediate gears, or The driving part and the input gear are arranged in one, the speed reducing mechanism and the piston assembly are arranged in two, wherein the input gear is in transmission connection with the two piston assemblies through at least one intermediate gear, or The driving part, the input gear, the speed reducing mechanism and the piston assembly are all arranged in two, and the two input gears are in transmission connection with the two speed reducing mechanisms through at least one intermediate gear, or The driving part and the input gears are arranged in two, the speed reducing mechanism and the piston assembly are arranged in three, and the two input gears are in transmission connection with the three speed reducing mechanisms through at least one intermediate gear. In some embodiments, the two drive portions comprise a first drive portion and a second drive portion; The two input gears comprise a first input gear and a second input gear, at least one intermediate gear comprises a first intermediate gear and a second intermediate gear, the first intermediate gear is in transmission connection with the first input gear, and the second intermediate gear is in transmission connection with the second input gear; The three reduction mechanisms comprise a first reduction mechanism, a second reduction mechanism and a third reduction mechanism, and the three piston assemblies comprise a first piston assembly, a second piston assembly and a third piston assembly; The first input gear is in transmission connection with the first driving part, the second input gear is in transmission connection with the second driving part, the first speed reducing mechanism and the second speed reducing mechanism are in transmission connection with the first intermediate gear, and the second speed reducing mechanism and the third speed reducing mechanism are in transmission connection with the second intermediate gear. In some embodiments, the reduction mechanism includes a dr