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CN-121993521-A - Electromechanical brake caliper, brake system and vehicle

CN121993521ACN 121993521 ACN121993521 ACN 121993521ACN-121993521-A

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 a driving part, a transmission mechanism, a first speed reducing mechanism, a second speed reducing mechanism, a first piston assembly and a second piston assembly, the driving part is in transmission connection with the first speed reducing mechanism and the second speed reducing mechanism through the transmission mechanism, the first speed reducing mechanism is in transmission connection with the first piston assembly, the second speed reducing mechanism is in transmission connection with the second piston assembly, and the first piston assembly and the second piston assembly can move along a first direction to abut against and drive the brake block to move. The electromechanical brake caliper has good braking performance.

Inventors

  • YANG LEI
  • YANG DEQIANG
  • XU JIE
  • LI WEIWEI

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 a driving part, a transmission mechanism, a first speed reducing mechanism, a second speed reducing mechanism, a first piston assembly and a second piston assembly; The driving part is in transmission connection with the first speed reducing mechanism and the second speed reducing mechanism through the transmission mechanism, the first speed reducing mechanism is in transmission connection with the first piston assembly, and the second speed reducing mechanism is in transmission connection with the second piston assembly; The first piston assembly and the second 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 drive module further includes a synchronizing mechanism drivingly disposed between the first and second reduction mechanisms.
  3. 3. The electromechanical brake caliper according to claim 1, wherein the transmission includes a first input gear, a first intermediate gear, and a second intermediate gear; The first input gear is in transmission connection with the driving part, and the first intermediate gear and the second intermediate gear are in transmission connection with the first input gear; the first intermediate gear is in transmission connection with the first speed reducing mechanism, and the second intermediate gear is in transmission connection with the second speed reducing mechanism.
  4. 4. The electromechanical brake caliper according to claim 3, wherein the first reduction mechanism includes a first output gear drivingly connected to the first intermediate gear and a first planetary gear assembly drivingly connected to the first piston assembly, and/or, The second speed reducing mechanism comprises a second output gear and a second planetary gear assembly which are in transmission connection, the second output gear is in transmission connection with the second intermediate gear, and the second planetary gear assembly is in transmission connection with the second piston assembly.
  5. 5. The electromechanical brake caliper according to claim 4, wherein the first and second output gears have diameters of a first size and the first and second intermediate gears have diameters of a second size, wherein the first size is greater than the second size.
  6. 6. The electromechanical brake caliper according to claim 4, wherein the first and/or second planetary gear assemblies include a sun gear, a planet gear, a ring gear, and a planet carrier; the sun gear is in transmission connection with the first output gear and/or the second output gear, the planet gears are arranged on the planet carrier and are 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 first piston assembly and/or the second piston assembly.
  7. 7. The electromechanical brake caliper according to claim 6, 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 which is used for being in transmission connection with the first piston assembly and/or the second piston assembly.
  8. 8. The electromechanical brake caliper according to any one of claims 1 to 7, characterized in that the caliper body is provided with a first beam body and a second beam body, both of which extend in a first direction and are arranged at intervals in a second direction, and a receiving groove is provided between the first beam body and the second beam body, the driving portion being provided in the receiving groove; The first beam body is internally provided with a first piston cavity penetrating along the first direction, the first piston assembly is arranged in the first piston cavity, the second beam body is internally provided with a second piston cavity penetrating along the first direction, and the second piston assembly is arranged in the second piston cavity; Wherein the first direction and the second direction are arranged in an intersecting manner.
  9. 9. The electromechanical brake caliper according to claim 8, 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 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 accommodating groove, of the second beam body in the second direction; The first beam body and the second beam body are symmetrically arranged in the second direction, and the first hollowed-out groove and the second hollowed-out groove are symmetrically arranged in the second direction.
  10. 10. Electromechanical brake calliper according to any of the claims 1-7, wherein the first and/or second 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 is in transmission connection with the first speed reducing mechanism and/or the second speed reducing mechanism, and the driving screw rod is axially locked and is 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.
  11. 11. The electromechanical brake caliper according to claim 10, wherein the lead screw nut assembly further includes a piston sleeve connected to the drive nut and adapted to abut the 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.
  12. 12. The electromechanical brake caliper according to claim 10, 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 first speed reducing mechanism and/or the second speed reducing mechanism.
  13. 13. The electromechanical brake caliper according to any of claims 1 to 7, wherein the drive module further includes an adapter plate; The adapter plate is arranged between the brake pad and the first piston assembly and the second piston assembly; the area of the adapter plate, which is abutted against the brake pad, is a first area, the sum of the areas of the first piston assembly, the second piston assembly and the adapter plate, which is abutted against the brake pad, is a second area, and the first area is larger than the second area.
  14. 14. The electromechanical brake caliper according to claim 13, wherein the adapter plate includes first and second sides disposed opposite each other in the first direction, the first side being recessed with first and second grooves, the first groove being for insertion of the first piston assembly, the second groove being for insertion of the second piston assembly; the first side surface is fixedly connected with the first piston assembly and/or the second piston assembly, or the second side surface is fixedly connected with the brake pad.
  15. 15. Electromechanical brake calliper according to claim 14, wherein the end of the piston sleeve of the first and/or second piston assembly is formed with a first plane, the inner wall of the first and/or second groove being formed with a second plane, the first plane being intended for abutment with the second plane.
  16. 16. Electromechanical brake calliper according to claim 14, wherein the end of the piston sleeve of the first and/or second piston assembly is formed with a first arcuate surface, the inner wall of the first and/or second groove being formed with a second arcuate surface, the first arcuate surface being intended to abut with the second arcuate surface.
  17. 17. The electromechanical brake caliper according to any one of claims 1 to 7, wherein the drive module further includes a module housing detachably provided to the caliper body, the transmission mechanism, the first reduction mechanism, and the second reduction mechanism being provided within the module housing.
  18. 18. The electromechanical brake caliper according to claim 17, wherein an interior of the caliper body is provided with a first piston cavity that penetrates in the first direction, the first piston assembly being disposed within the first piston cavity; a second piston cavity penetrating along the first direction is formed in the caliper body, and the second piston assembly is arranged in the second piston cavity; The caliper body is concavely provided with an accommodating groove, and the driving part is arranged in the accommodating groove; The module housing is provided with a first opening, a second opening and a third opening, the first opening and the accommodating groove are oppositely arranged in the first direction, the second opening and the first piston cavity are oppositely arranged in the first direction, and the third opening and the second piston cavity are oppositely arranged 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 a driving part, a transmission mechanism, a first speed reducing mechanism, a second speed reducing mechanism, a synchronous mechanism, a first piston assembly and a second piston assembly; The driving part is in transmission connection with the first speed reducing mechanism and the second speed reducing mechanism through the transmission mechanism, the first speed reducing mechanism is in transmission connection with the first piston assembly, and the second speed reducing mechanism is in transmission connection with the second piston assembly; The first piston assembly and the second piston assembly can move along a first direction so as to abut against and drive the brake pad to move. In some embodiments, the drive module further comprises a synchronizing mechanism drivingly disposed between the first reduction mechanism and the second reduction mechanism. In some embodiments, the transmission includes a first input gear, a first intermediate gear, and a second intermediate gear; The first input gear is in transmission connection with the driving part, and the first intermediate gear and the second intermediate gear are in transmission connection with the first input gear; the first intermediate gear is in transmission connection with the first speed reducing mechanism, and the second intermediate gear is in transmission connection with the second speed reducing mechanism. In some embodiments, the first reduction mechanism includes a first output gear in driving connection with the first intermediate gear and a first planetary gear assembly in driving connection with the first piston assembly, and/or, The second speed reducing mechanism comprises a second output gear and a second planetary gear assembly which are in transmission connection, the second output gear is in transmission connection with the second intermediate gear, and the second planetary gear assembly is in transmission connection with the second piston assembly. In some embodiments, the first output gear and the second output gear have diameters of a first size and the first intermediate gear and the second intermediate gear have diameters of a second size, wherein the first size is greater than the second size. In some embodiments, the first planetary gear assembly and/or the second 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 first output gear and/or the second output gear, the planet gears are arranged on the planet carrier and are 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 first piston assembly and/or the second piston assembly. In some embodiments, the planet 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