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CN-121993519-A - Motor-driven brake

CN121993519ACN 121993519 ACN121993519 ACN 121993519ACN-121993519-A

Abstract

The application discloses a motor-driven brake, which relates to the technical field of automobile braking systems and comprises a braking device, a driving device and a fixing device, wherein the braking device comprises a braking disc, an elastic resetting piece, a braking caliper and a braking piece, the braking disc is fixedly sleeved on a driving half shaft and is in torsion-resistant connection with the driving half shaft, the braking caliper is arranged on one side of the fixing device and can be sleeved outside the braking disc along the radial direction of the driving half shaft, the braking piece is movably arranged in the braking caliper along the axial direction of the driving half shaft, the elastic resetting piece is arranged in the braking caliper and is used for providing elastic acting force for the braking piece to move away from the braking disc, and the driving device is arranged in the braking caliper and is used for driving the braking piece and/or the braking caliper to move so that the braking piece contacts the braking disc. The radial disassembly and assembly can be realized through the design, meanwhile, the driving layout is simplified, and the brake response sensitivity and the later maintenance convenience are improved.

Inventors

  • LI XIAOKE
  • LI QIHONG

Assignees

  • 珠海华粤传动科技有限公司

Dates

Publication Date
20260508
Application Date
20260212

Claims (10)

  1. 1. A motor-driven brake, characterized by comprising a braking device (100), a driving device (200) and a fixing device (300); the brake device (100) comprises a brake disc (11), an elastic resetting piece (14), a brake caliper (12) and a brake pad; The brake disc (11) is sleeved and fixed on the driving half shaft (400) and is in torsion-resistant connection with the driving half shaft (400); the brake caliper (12) is arranged on one side of the fixing device (300) and can be sleeved outside the brake disc (11) along the radial direction of the driving half shaft (400); the brake pad is movably mounted in the brake caliper (12) along the axial direction of the drive half shaft (400); the elastic restoring piece (14) is arranged in the brake caliper (12) and is used for providing elastic acting force for moving the brake pad away from the brake disc (11); The driving device (200) is mounted on the brake caliper (12) and is used for driving the brake pad and/or the brake caliper (12) to move so that the brake pad contacts the brake disc (11).
  2. 2. A motor-driven brake according to claim 1, characterized in that the brake caliper (12) is floatingly mounted on one side of the fixing means (300) in the axial direction of the drive half shaft (400); At least two of said brake pads, wherein at least one of said brake pads is a master brake pad (131) and at least one of said brake pads is a slave brake pad (132); the driving brake pads (131) and the driven brake pads (132) are distributed on two sides of the brake disc (11) along the axial direction of the driving half shaft (400); the driving device (200) is provided with a first driving end and a second driving end; The first driving end is in contact with the active brake pad (131) and is used for driving the active brake pad (131) to move towards the direction approaching the brake disc (11); the second driving end is in contact with the floating caliper and is used for driving the driving brake pad (131) by the first driving end and simultaneously driving the brake caliper (12) to move towards the direction approaching to the fixing device (300) so as to synchronously drive the driven brake pad (132) to move towards the direction approaching to the brake disc (11).
  3. 3. A motor-driven brake according to claim 2, characterized in that the brake device (100) further comprises a force transfer plate (15); The force transmission plate (15) is movably arranged in the brake caliper (12) along the axial direction of the driving half shaft (400) and is positioned at one side of the brake disc (11) close to the driving device (200); the first driving end is in contact with the force transmission plate (15); The inner peripheral wall of the brake caliper (12) is provided with a force transmission chute (123); And a force transmission sliding key (151) which is in sliding fit with the force transmission sliding groove (123) is arranged on the force transmission plate (15).
  4. 4. A motor-driven brake according to claim 3, characterized in that the inner side wall of the brake caliper (12) remote from the drive means (200) is provided with a driven recess (124); The driven brake block (132) is movably arranged in the driven groove (124) along the axial direction of the driving half shaft (400); a driving groove (152) is formed in one side wall, far away from the driving device (200), of the force transmission plate (15); the active brake block (131) is movably mounted in the active groove (152) along the axial direction of the driving half shaft (400).
  5. 5. A motor-driven brake according to claim 4, characterized in that the inner side wall of the brake caliper (12) remote from the drive means (200) is provided with a driven guide groove (125) communicating with the driven recess (124); the driven brake block (132) is provided with a driven sliding key matched with the driven guide groove (125); A side wall of the force transfer plate (15) far away from the driving device (200) is provided with a driving guide groove (153) communicated with the driving groove (152); the active brake block (131) is provided with an active sliding key matched with the active guide groove (153).
  6. 6. A motor-driven brake according to claim 2, wherein the elastic restoring member (14) is a U-shaped elastic member, and both ends thereof are respectively connected to the driving brake pad (131) and the driven brake pad (132).
  7. 7. A motor-driven brake according to claim 2, characterized in that the drive means (200) comprise a drive housing (21), a drive motor (22), a transmission assembly (23), a force transmission ring (26), a driving screw (24) and a driven screw (25); The driving shell (21) is fixedly connected with the brake caliper (12); the driving screw (24) and the driven screw (25) are arranged on the driving machine shell (21) and are provided with hollow cavities for the driving half shafts (400) to pass through; The driving screw (24) is in nested fit with the driven screw (25) and is in threaded connection; The driving motor (22) is mounted on the driving shell (21), and the driving end of the driving motor is connected with the driving threaded piece (24) through the transmission assembly (23) and is used for driving the driven threaded piece (25) to move along the axial direction of the driving half shaft (400) by driving the driving threaded piece (24) to rotate; The force transmission ring (26) is sleeved outside the driving screw member (24), one end of the force transmission ring is provided with a first flange (261) which is rotationally connected with the axial end part of the driving screw member (24) back to the driven screw member (25), and the other end of the force transmission ring is provided with a second flange (262) which is contacted with the inner side wall of the brake caliper (12) close to the driving device (200); -an end of the driven screw (25) remote from the driving screw (24) forms the first driving end; The first flange (261) forms the second drive end.
  8. 8. A motor-driven brake according to claim 7, characterized in that the drive means (200) further comprises a sealing ring (28); A third flange (251) which is flush with the first flange (261) is arranged at one end of the driven screw (25) far away from the driving screw (24); the seal ring (28) is disposed between the second flange (262) and the third flange (251).
  9. 9. A motor-driven brake according to claim 3, characterized in that the fixing means (300) comprise a fixing bracket (31) and a floating assembly (32); the floating assembly (32) is floatingly mounted to the fixed bracket (31) along the axial direction of the driving half shaft (400) and is fixedly connected with the brake caliper (12).
  10. 10. A motor-driven brake according to claim 9, characterized in that the floating assembly (32) comprises a bearing pin (321) and a sliding pin (322); both side walls of the brake caliper (12) are provided with supporting holes (126); one end of the supporting pin (321) sequentially passes through the supporting holes (126) on the two side walls of the brake caliper (12) and is in threaded connection with the sliding pin (322); the other end of the supporting pin (321) and the sliding pin (322) form clamping fixation for the brake caliper (12); an avoidance hole (154) for avoiding the supporting pin (321) is formed in the force transmission plate (15); the fixed bracket (31) is provided with a pin hole (311) into which the sliding pin (322) is movably inserted; the float assembly (32) further comprises a sealing sleeve (323); the sealing sleeve (323) is sleeved on the sliding pin (322) and is contacted with the fixed bracket (31) for sealing the pin hole (311).

Description

Motor-driven brake Technical Field The application relates to the technical field of automobile braking systems, in particular to a motor-driven brake. Background In conventional motor vehicle brake system arrangements, the disc brake is typically mounted directly on the knuckle or hub unit of the wheel in the form of a caliper. This direct mounting allows the brake assembly to be part of the unsprung mass. The increase in unsprung mass has a significant negative effect on the response characteristics of the suspension system of the vehicle, resulting in a decrease in the following property of the suspension when it faces road surface fluctuations, thereby deteriorating the running comfort and steering stability of the vehicle. Meanwhile, the internal space of the hub is narrow, the limited space is further occupied by the direct installation of the brake, the compact design and the light weight of the brake are severely restricted, more excellent materials and structures are difficult to be adopted to lighten the weight and reduce the volume, in addition, in novel power architectures of electric automobiles and the like, space interference is extremely easy to generate in arrangement with parts such as a wheel driving motor and a speed reducer, and the integration level and the layout flexibility of a whole vehicle power system are limited. In addition, although the conventional hydraulic brake system is widely applied, the conventional hydraulic brake system has inherent limitations in terms of response speed and braking accuracy, requires a certain time for pressure establishment and transmission of a hydraulic line, is susceptible to factors such as temperature, hydraulic oil characteristics and the like, and causes a delay in braking response and insufficient braking force control accuracy. However, in the conventional electro-mechanical brake (EMB) system, although the response speed and the control accuracy are improved, the actuating components of the conventional electro-mechanical brake (EMB) system are still arranged at the wheel end, so that the adverse effect of the brake as an unsprung mass on the dynamic performance of the vehicle cannot be fundamentally solved. Therefore, how to effectively reduce unsprung mass, improve brake response speed and accuracy, and optimize hub space layout becomes a critical problem to be solved in motor vehicle brake system design. Disclosure of Invention In view of the above, the present application aims to provide a motor-driven brake, which can realize arrangement on a shaft and radial disassembly, simplify a driving layout, effectively reduce unsprung mass, and improve brake response speed and accuracy. In order to achieve the technical aim, the application provides a motor-driven brake, which comprises a braking device, a driving device and a fixing device; the braking device comprises a braking disc, an elastic resetting piece, a braking caliper and a braking piece; the brake disc is sleeved on the driving half shaft and is in torsion-resistant connection with the driving half shaft; The brake calipers are arranged on one side of the fixing device and can be sleeved outside the brake disc along the radial direction of the driving half shaft; the brake pad is movably arranged in the brake caliper along the axial direction of the driving half shaft; the elastic resetting piece is arranged in the brake caliper and is used for providing elastic acting force for the brake pad to move away from the brake disc; the driving device is arranged on the brake caliper and used for driving the brake pad and/or the brake caliper to move so that the brake pad contacts the brake disc. Further, the brake caliper is floatingly mounted on one side of the fixing device along the axial direction of the driving half shaft; At least two of the brake pads, wherein at least one of the brake pads is a driving brake pad and at least one of the brake pads is a driven brake pad; The driving brake block and the driven brake block are distributed on two sides of the brake disc along the axial direction of the driving half shaft; The driving device is provided with a first driving end and a second driving end; the first driving end is in contact with the active brake pad and is used for driving the active brake pad to move in a direction approaching to the brake disc; The second driving end is in contact with the floating caliper and is used for driving the brake caliper to move in the direction approaching to the fixing device while the first driving end drives the driving brake pad so as to synchronously drive the driven brake pad to move in the direction approaching to the brake disc. Further, the braking device further comprises a force transmission plate; the force transmission plate is movably arranged in the brake caliper along the axial direction of the driving half shaft and is positioned at one side of the brake disc, which is close to the driving device; the first driving end is