Brake-by-wire structure and brake system

Abstract

The utility model provides a brake-by-wire structure and a brake system. A driving assembly moves to drive a brake assembly to move, so that the brake assembly controls a brake piston to stretch out to drive a brake pad to brake; the driving assembly moves reversely to drive the braking assembly to move reversely, so that the braking assembly controls the braking piston to be contained in the movable hole, and the brake pad is driven to break away from braking. And brake is carried out by adopting a drive-by-wire machine, so that the maintenance is simpler, the response time is shorter, and power-off band-type brake braking can be supported, so that the safety of the vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of braking systems, and more particularly to a brake-by-wire structure and braking system. Background Technology

[0002] With the increasing popularity of intelligent vehicles, there are more and more driver assistance functions on cars. These functions can help drivers better control the vehicle to ensure driving safety.

[0003] Existing driver assistance features include lane departure warning, automatic driving, and automatic parking. For vehicles traveling at high speeds, the braking system needs to be highly responsive and reliable to prevent accidents caused by the inability to brake in time if a problem occurs during high-speed driving.

[0004] Most existing braking systems use a drive-by-wire hydraulic braking system, which uses a motor-driven mechanism to compress a liquid medium to generate hydraulic pressure. The hydraulic circuit then acts on the piston of the caliper, causing the piston to move closer to the brake pads, thereby pushing the brake pads into contact with the brake disc and completing the braking process.

[0005] Because drive-by-wire hydraulic braking systems operate using hydraulic circuits, the hydraulic pressure and sealing requirements are very high, making maintenance extremely complex. Furthermore, establishing the hydraulic pressure is time-consuming, and due to the limitations of the hydraulic circuit, most systems cannot support prolonged parking braking, significantly impacting vehicle braking performance. Utility Model Content

[0006] In view of this, it is necessary to provide a brake-by-wire structure and braking system to solve the above problems.

[0007] Embodiments of this application provide a brake-by-wire structure, comprising:

[0008] The caliper base has a movable hole;

[0009] The drive assembly is mounted on the caliper mount;

[0010] The braking assembly has one end rotatably connected to the drive assembly, and the other end housed in the movable hole and drivenly connected to the caliper seat;

[0011] A brake piston is located at the end of the braking assembly away from the driving assembly, and the brake piston is movably received within the movable hole;

[0012] The drive assembly moves to drive the brake assembly to move, thereby pushing the brake piston to extend or be received in the movable hole, so as to drive the brake pads to brake or disengage from the brake.

[0013] In at least one embodiment of this application, the braking assembly includes:

[0014] The motion shaft has a first thread on its exterior, one end of which is located on the drive assembly, and the other end is fixedly connected to the brake piston.

[0015] A moving sleeve is disposed in the movable hole, and the moving sleeve is provided with a threaded hole. The moving shaft is driven by the lead screw in the threaded hole through the first thread.

[0016] The drive assembly moves to drive the motion shaft to move within the motion sleeve, thereby pushing the brake piston to extend out or be received within the movable hole.

[0017] In at least one embodiment of this application, the driving component includes:

[0018] Drive motor;

[0019] The drive linkage assembly has one end fixedly connected to the drive motor and the other end located on the motion shaft.

[0020] In at least one embodiment of this application, the drive linkage assembly includes:

[0021] One end of the transmission connecting rod is rotatably connected to the output end of the drive motor;

[0022] The drive rod has one end rotatably connected to the end of the transmission link away from the drive motor, and the other end fixedly connected to the motion shaft.

[0023] In at least one embodiment of this application, the drive linkage assembly further includes:

[0024] A first movable bearing is disposed between the transmission connecting rod and the output shaft of the drive motor, and connects the transmission connecting rod and the output shaft of the drive motor.

[0025] In at least one embodiment of this application, the drive linkage assembly further includes:

[0026] The second movable bearing is located between the transmission link and the drive rod, and connects the transmission link and the drive rod.

[0027] In at least one embodiment of this application, the driving component further includes:

[0028] A mounting plate is disposed on the caliper seat, and the drive motor is mounted on the mounting plate.

[0029] In at least one embodiment of this application, the mounting plate is located on the side of the caliper seat away from the brake pads.

[0030] A braking system includes a brake-by-wire structure as described in any of the preceding claims, the brake-by-wire structure comprising two sets of symmetrically arranged brake-by-wire structures.

[0031] In at least one embodiment of this application, the braking system further includes:

[0032] A brake disc is disposed between the two sets of the aforementioned brake-by-wire structures;

[0033] Two brake pads abut against two brake pistons respectively;

[0034] A fixed shaft is fixed at both ends to the two sets of the brake-by-wire structures, and the fixed shaft passes through the two brake pads.

[0035] Implementing the brake-by-wire structure and braking system of this embodiment will have at least the following beneficial effects:

[0036] The aforementioned brake-by-wire structure and braking system allow the drive assembly to move, thereby driving the brake assembly to move, causing the brake assembly to control the brake piston to extend and drive the brake pads to brake; the drive assembly can also move in the opposite direction, causing the brake assembly to move in the opposite direction, causing the brake assembly to control the brake piston to be received in the movable hole and drive the brake pads to disengage from the brake.

[0037] Using drive-by-wire mechanical braking simplifies maintenance, reduces response time, and supports power-off brake braking, thereby improving vehicle safety. Attached Figure Description

[0038] Figure 1 This is a structural diagram of the linear control braking structure in one embodiment of the present invention;

[0039] Figure 2 for Figure 1 Exploded view of the linear braking structure in the diagram;

[0040] Figure 3 for Figure 1 A structural diagram of the linear braking structure from another angle;

[0041] Figure 4 This is a structural diagram of the braking system in one embodiment of the present invention;

[0042] Figure 5 for Figure 4 An exploded view of the braking system.

[0043] Explanation of main component symbols

[0044] 100. Braking-by-wire structure;

[0045] 110. Caliper base; 110a. Movable hole;

[0046] 120. Drive assembly; 121. Drive motor; 122. Drive linkage assembly; 1221. Transmission linkage; 1222. Drive tie rod; 123. First movable bearing; 124. Second movable bearing; 125. Mounting plate;

[0047] 130. Braking assembly; 131. Motion shaft; 131a. First thread; 132. Motion sleeve; 132a. Threaded hole;

[0048] 140. Brake piston;

[0049] 150. Braking system; 151. Brake disc; 152. Brake pad; 153. Fixed shaft. Detailed Implementation

[0050] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0051] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0052] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0053] Embodiments of this application provide a brake-by-wire structure 100, comprising:

[0054] Caliper base 110 has a movable hole 110a;

[0055] The drive assembly 120 is disposed on the caliper base 110;

[0056] The braking assembly 130 has one end rotatably connected to the drive assembly 120, and the other end is received in the movable hole 110a and is connected to the caliper seat 110 in a transmission manner.

[0057] A brake piston 140 is disposed at the end of the brake assembly 130 away from the drive assembly 120, and the brake piston 140 is movably received within the movable hole 110a.

[0058] The drive assembly 120 moves to drive the brake assembly 130 to move, thereby pushing the brake piston 140 to extend or be received in the movable hole 110a, so as to drive the brake pad 152 to brake or disengage from the brake.

[0059] Please refer to Figures 1-3 In this embodiment, the drive assembly 120 moves to drive the brake assembly 130 to move, so that the brake assembly 130 controls the brake piston 140 to extend, thereby driving the brake pad 152 to brake; the drive assembly 120 moves in the opposite direction to drive the brake assembly 130 to move in the opposite direction, so that the brake assembly 130 controls the brake piston 140 to be received in the movable hole 110a, thereby driving the brake pad 152 to disengage from the brake.

[0060] Using drive-by-wire mechanical braking simplifies maintenance, reduces response time, and supports power-off brake braking, thereby improving vehicle safety.

[0061] It should be noted that the movable hole 110a is a circular through hole; the brake piston 140 is roughly cylindrical.

[0062] In at least one embodiment of this application, the braking assembly 130 includes:

[0063] The motion shaft 131 has a first thread 131a on its exterior, one end of which is located on the drive assembly 120, and the other end is fixedly connected to the brake piston 140.

[0064] A moving sleeve 132 is disposed in the movable hole 110a. The moving sleeve 132 is provided with a threaded hole 132a. The moving shaft 131 is driven by a lead screw through the first thread 131a and the threaded hole 132a.

[0065] The drive assembly 120 moves to drive the motion shaft 131 to move within the motion sleeve 132, thereby pushing the brake piston 140 to extend out or be received within the movable hole 110a.

[0066] In at least one embodiment of this application, the driving component 120 includes:

[0067] Drive motor 121;

[0068] The drive linkage assembly 122 is fixedly connected to the drive motor 121 at one end and is mounted on the motion shaft 131 at the other end.

[0069] In at least one embodiment of this application, the drive linkage assembly 122 includes:

[0070] One end of the transmission link 1221 is rotatably connected to the output end of the drive motor 121;

[0071] The drive rod 1222 has one end rotatably connected to the end of the transmission link 1221 away from the drive motor 121, and the other end is fixedly connected to the motion shaft 131.

[0072] In at least one embodiment of this application, the drive linkage assembly 122 further includes:

[0073] The first movable bearing 123 is disposed between the transmission link 1221 and the output shaft of the drive motor 121, and connects the transmission link 1221 and the output shaft of the drive motor 121.

[0074] In at least one embodiment of this application, the drive linkage assembly 122 further includes:

[0075] The second movable bearing 124 is disposed between the transmission link 1221 and the drive link 1222, and connects the transmission link 1221 and the drive link 1222.

[0076] In at least one embodiment of this application, the driving component 120 further includes:

[0077] Mounting plate 125 is disposed on caliper seat 110, and drive motor 121 is mounted on mounting plate 125.

[0078] In at least one embodiment of this application, the mounting plate 125 is located on the side of the caliper seat 110 away from the brake pad 152.

[0079] Please refer to Figures 1-5 In this embodiment, when braking, the vehicle sends a braking signal to the braking system 150, and the braking system 150 controls the two sets of drive-by-wire braking structures 100 to work.

[0080] At this time, the drive motor 121 rotates, driving the transmission link 1221 to rotate around the output shaft of the drive motor 121. The rotation of the transmission link 1221 drives the drive rod 1222 to rotate, and the rotation of the drive rod 1222 drives the motion shaft 131 to rotate inside the motion sleeve 132. Since the motion shaft 131 and the motion sleeve 132 are driven by the first thread 131a screw, and the motion sleeve 132 is fixed inside the movable hole 110a, the motion shaft 131 moves along the axis of the motion sleeve 132 towards the brake pad 152 during rotation, thereby driving the brake piston 140 to drive the brake pad 152 to brake, so as to decelerate or stop the vehicle.

[0081] Similarly, the drive motor 121 reverses to drive the transmission link 1221 and the drive rod 1222 to reverse, so as to drive the motion shaft 131 to move away from the brake pad 152 along the axis of the motion sleeve 132, so that the brake piston 140 is received in the movable hole 110a, so that the vehicle is released from the brake.

[0082] This brake-by-wire structure 100 is an electromechanical brake, suitable for the brake-by-wire system 150, which improves the control accuracy of the brake and enhances the braking response capability.

[0083] It should be noted that the motion shaft 131 is a lead screw shaft; the motion sleeve 132 is cylindrical, and the motion sleeve 132 has a threaded hole 132a, which passes through the motion sleeve 132, and the threaded hole 132a is connected to the lead screw with the first thread 131a.

[0084] The drive motor 121 is an electric motor; the transmission link 1221 is a cylindrical rod; the drive tie rod 1222 is roughly rod-shaped; the first movable bearing 123 and the second movable bearing 124 are both fisheye bearings, used to ensure the rotation angle of the transmission link 1221 relative to the output end of the drive motor 121 and the rotation angle of the transmission link 1221 relative to the drive tie rod 1222, and to avoid interference between the transmission link 1221 and the output end of the drive motor 121 or the drive tie rod 1222.

[0085] The drive linkage assembly 122 is used as the link between the drive motor 121 and the motion shaft 131. Through two-stage reduction, the load on the output end of the drive motor 121 is reduced, and the drive motor 121 has a brake function.

[0086] Mounting plate 125 is roughly triangular in shape, with its two ends fixed to caliper base 110 and its third end used to fix drive motor 121, thus providing a fixed point for drive motor 121.

[0087] It should be further explained that the lengths of the drive rod 1222 and the transmission link 1221 can be changed according to different braking force requirements. Different models of drive motors 121 can also be replaced to provide different braking response capabilities and maximum braking force. The fixed position of the drive motor 121 on the mounting plate 125 can also be changed to provide different braking feel. After the entire system is installed, the braking effect can also be finely adjusted through the transmission link 1221.

[0088] A braking system 150 includes a brake-by-wire structure 100 as described in any of the above claims, the brake-by-wire structure 100 comprising two sets, the two sets of brake-by-wire structures 100 being symmetrically arranged.

[0089] In at least one embodiment of this application, the braking system 150 further includes:

[0090] Brake disc 151 is disposed between the two sets of brake-by-wire structures 100;

[0091] Two brake pads 152 abut against two brake pistons 140 respectively;

[0092] The fixed shaft 153 is fixed at both ends to the two sets of the brake-by-wire structures 100 respectively, and the fixed shaft 153 passes through the two brake pads 152.

[0093] Please refer to Figures 1-5 In this embodiment, the braking system 150 uses two drive motors 121 to drive two brake pads 152 respectively, thereby having a failure redundancy capability. It should be noted that the brake pads 152 are brake shoes.

[0094] The braking system 150 adopts two sets of brake-by-wire structures 100 arranged symmetrically at the center to reduce the size of the braking system 150 and save installation space.

[0095] This braking system 150 uses wire-controlled mechanical braking, which simplifies maintenance, reduces response time, and supports power-off brake braking to improve vehicle safety.

[0096] It should be noted that the fixed shaft 153 is a round shaft. When the drive motor 121 drives the brake piston 140 to move closer to the brake pad 152, it pushes the brake pad 152 to abut against the brake disc 151, so as to decelerate or stop the vehicle through the brake disc 151.

[0097] It should be further explained that the online control braking structure 100 is also equipped with a brake failure sensor. By collecting braking angle and torque output data, it can sense the wear of the brake pads 152, thereby predicting the risk of failure in advance and issuing an alarm to the VCU.

[0098] The use of a self-sensing scheme for braking system failure includes, but is not limited to, the use of sensors to sense angle changes and the use of algorithms for detection.

[0099] In another embodiment, a set of brake-by-wire structures 100 is used to provide a floating caliper design at the vehicle's brake structure, enabling brake-by-wire mechanical braking, which simplifies maintenance, reduces response time, and supports power-off brake braking to improve vehicle safety.

[0100] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A brake-by-wire structure, characterized in that, include: The caliper base has a movable hole; The drive assembly is mounted on the caliper mount; The braking assembly has one end rotatably connected to the drive assembly, and the other end housed in the movable hole and drivenly connected to the caliper seat; A brake piston is located at the end of the braking assembly away from the driving assembly, and the brake piston is movably received within the movable hole; The drive assembly moves to drive the brake assembly to move, thereby pushing the brake piston to extend or be received in the movable hole, so as to drive the brake pads to brake or disengage from the brake.

2. The brake-by-wire structure according to claim 1, characterized in that, The braking assembly includes: The motion shaft has a first thread on its exterior, one end of which is located on the drive assembly, and the other end is fixedly connected to the brake piston. A moving sleeve is disposed in the movable hole, and the moving sleeve is provided with a threaded hole. The moving shaft is driven by the lead screw in the threaded hole through the first thread. The drive assembly moves to drive the motion shaft to move within the motion sleeve, thereby pushing the brake piston to extend out or be received within the movable hole.

3. The linear braking structure according to claim 2, characterized in that, The driving component includes: Drive motor; The drive linkage assembly has one end fixedly connected to the drive motor and the other end located on the motion shaft.

4. The brake-by-wire structure according to claim 3, characterized in that, The drive linkage assembly includes: One end of the transmission connecting rod is rotatably connected to the output end of the drive motor; The drive rod has one end rotatably connected to the end of the transmission link away from the drive motor, and the other end fixedly connected to the motion shaft.

5. The linear braking structure according to claim 4, characterized in that, The drive linkage assembly also includes: A first movable bearing is disposed between the transmission connecting rod and the output shaft of the drive motor, and connects the transmission connecting rod and the output shaft of the drive motor.

6. The brake-by-wire structure according to claim 4, characterized in that, The drive linkage assembly also includes: The second movable bearing is located between the transmission link and the drive rod, and connects the transmission link and the drive rod.

7. The brake-by-wire structure according to claim 3, characterized in that, The driving component also includes: A mounting plate is disposed on the caliper seat, and the drive motor is mounted on the mounting plate.

8. The brake-by-wire structure according to claim 7, characterized in that, The mounting plate is located on the side of the caliper mount away from the brake pads.

9. A braking system, characterized in that, The system includes the brake-by-wire structure as described in any one of claims 1-8, wherein the brake-by-wire structure comprises two sets, and the two sets of brake-by-wire structures are symmetrically arranged.

10. The braking system according to claim 9, characterized in that, The braking system also includes: A brake disc is disposed between the two sets of the aforementioned brake-by-wire structures; Two brake pads abut against two brake pistons respectively; A fixed shaft is fixed at both ends to the two sets of the brake-by-wire structures, and the fixed shaft passes through the two brake pads.

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