Electromechanical brake device, system and vehicle with one-way compensation of wear gap

Abstract

The application provides an electronic mechanical brake device, system and vehicle for compensating wear gap in one direction. The electronic mechanical brake device comprises a brake motor, a reversing mechanism and a compensation mechanism. The brake motor drives the rotating input of the reversing mechanism to rotate. The reversing mechanism converts the rotating motion of the rotating input into the displacement motion of the moving output. The moving output of the reversing mechanism is provided with a pushing piece extending towards the brake. The moving output of the reversing mechanism is displaced towards the brake and pushes the brake through the pushing piece to brake the vehicle. The rotating input of the compensation mechanism rotates synchronously with the rotating input of the reversing mechanism. The clutch output of the compensation mechanism is in one-way transmission with the pushing piece. The compensation mechanism works in the forward rotation mode or the reverse rotation mode. The extension amount of the pushing piece relative to the reversing mechanism increases or the pushing piece slips. The electronic mechanical brake device of the application increases the extension amount of the pushing piece relative to the moving output by driving the pushing piece, thereby realizing the wear compensation of the friction plate.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to an electromechanical braking device for unidirectional compensation of wear gaps, an electromechanical braking system, and a vehicle. Background Technology

[0002] Electro-mechanical brakes (EMBs) use a combination of an electric motor and a mechanical transmission mechanism to drive the brake. EMBs are characterized by their simple structure, rapid response, smooth load transfer, and lack of hydraulic lines, resulting in high transmission efficiency. EMBs can improve vehicle safety, handling, and comfort.

[0003] After a vehicle has been driven for a long time, the friction pads inside the brakes will wear out, which will increase the travel of the electromechanical braking device when it drives the brake, and the travel of the vehicle's brake pedal will also increase. This is not conducive to the precise control of the electromechanical device and is detrimental to the vehicle's safety. Summary of the Invention

[0004] This application provides an electromechanical braking device for unidirectional compensation of wear clearance, an electromechanical braking system, and a vehicle. Wear compensation for the friction pads is achieved by driving the electromechanical braking device to extend unidirectionally. Specifically, this application includes the following solutions:

[0005] In a first aspect, this application provides an electromechanical braking device for unidirectional compensation of wear clearance. The electromechanical braking device includes a brake motor, a reversing mechanism and a compensation mechanism. The brake motor drives the rotary input component of the reversing mechanism to rotate. The reversing mechanism converts the rotational motion of the rotary input component into the displacement motion of the movable output component. The movable output component of the reversing mechanism is provided with a pushing component extending toward the brake. The movable output component of the reversing mechanism is displaced toward the brake and pushes the brake through the pushing component to brake the vehicle.

[0006] The rotary input component of the compensation mechanism rotates synchronously with the rotary input component of the reversing mechanism. The clutch output component of the compensation mechanism and the push component are driven in one direction. When the compensation mechanism is working in forward rotation mode, the compensation mechanism drives the push component to move within the reversing mechanism and increases the extension amount of the push component. When the compensation mechanism is working in reverse rotation mode, the compensation mechanism and the push component slip.

[0007] This application discloses an electromechanical braking device used to drive a brake on a vehicle. The reversing mechanism of the electromechanical braking device converts the rotational motion of the brake motor into the displacement motion of a movable output component, and then uses a pusher on the movable output component to actuate the brake. The pusher is movably connected to the movable output component of the reversing mechanism.

[0008] The electromechanical braking device of this application further includes a compensation mechanism whose rotary input component rotates synchronously with the reversing mechanism's rotary input component. This allows the reversing mechanism's rotary input component to rotate when driven by the brake motor, thereby driving the compensation mechanism's rotary input component to rotate as well. The compensation mechanism's clutch output component is used to drive the push component to move relative to the moving output component, adjusting the extension amount of the push component relative to the moving output component.

[0009] Among them, the clutch output component of the compensation mechanism has a one-way clutch transmission function, and the extension of the pushing component relative to the moving output component of the reversing mechanism is unidirectionally extended, which can compensate for the wear of the brake after long-term use and ensure that the braking stroke of the electromechanical braking device remains relatively constant, which is conducive to improving the control accuracy of the electromechanical braking device.

[0010] In one implementation, the rotary input component of the reversing mechanism includes a cam, the movable output component of the reversing mechanism includes a slider, and the pushing component is a screw rotatably connected within the slider. A brake motor drives the cam to rotate, and the cam drives the slider to displace the screw toward the brake. Wherein:

[0011] The rotation axis of the cam is perpendicular to the displacement direction of the slider;

[0012] The axis of rotation of the screw is parallel to the direction of displacement of the sliding element.

[0013] In this implementation, the cam of the reversing mechanism can be connected to the motor drive and driven to rotate by the brake motor. The cam can push the slider towards the brake, thereby realizing the function of the reversing mechanism to convert the rotational motion of the brake motor into the displacement motion of the moving output component.

[0014] In one implementation, the rotary input shaft of the compensation mechanism includes a drive wheel, and the clutch output element of the compensation mechanism includes a one-way clutch, wherein:

[0015] The drive wheel is coaxially driven with the rotary input component of the reversing mechanism and is used to drive the rotation of the one-way clutch;

[0016] The one-way clutch and the pusher are driven on the same axis. When the compensation mechanism is in forward rotation mode, the one-way clutch rotates forward and drives the pusher to extend out of the sliding member. When the compensation mechanism is in reverse rotation mode, the one-way clutch rotates in reverse and slips between itself and the sliding member.

[0017] In this implementation, the compensation mechanism drives the one-way clutch to rotate via the drive wheel. The drive wheel can be coaxially driven with the rotary input component of the reversing mechanism, while the one-way clutch rotates coaxially with the push component of the reversing mechanism. This creates the effect that the compensation mechanism drives the push component to move unidirectionally within the moving output component of the reversing mechanism.

[0018] In one implementation, a one-way clutch is located in the inner hole of the pusher, and the one-way clutch is a ratchet pawl clutch or an overrunning clutch.

[0019] In this implementation, the one-way clutch is located within the inner hole of the pusher, which improves the integration of the electromechanical braking device and reduces the size of the compensation mechanism. Furthermore, by employing a ratchet-pawl clutch or an overrunning clutch, the one-way clutch can achieve unidirectional transmission.

[0020] In one implementation, the compensation mechanism includes a driven wheel and a gap. The driven wheel is coaxially driven with the one-way clutch. Along the displacement direction of the pusher, the driven wheel is located on the side of the one-way clutch away from the brake. The gap is driven between the drive wheel and the driven wheel, wherein:

[0021] The drive wheel is used to drive the gap to slide relative to the pusher, and the sliding direction of the gap is perpendicular to the displacement direction of the pusher and also perpendicular to the rotation axis of the drive wheel;

[0022] After the gap slides a preset distance, it engages with the driven wheel and drives the driven wheel to rotate the one-way clutch in the forward direction.

[0023] In this implementation, the gap of the compensation mechanism slides a preset distance and then engages with the driven wheel. The gap then drives the one-way clutch to rotate forward via the driven wheel. Before the gap engages with the driven wheel, the transmission between the drive wheel and the gap of the compensation mechanism will not drive the one-way clutch to rotate forward. This allows control over the timing of the compensation mechanism's operation, ensuring that the pushing component and the moving output component of the reversing mechanism are relatively fixed when the brake motor can normally drive the brake through the reversing mechanism.

[0024] In one implementation, the gapper includes a sliding input section and a sliding output section. The sliding input section is connected to the drive wheel via a transmission, and the sliding output section is used to engage with the driven wheel, wherein:

[0025] The length direction of the sliding input section is parallel to the length direction of the sliding output section;

[0026] The length of the sliding input section is greater than the length of the sliding output section, and the difference between the length of the sliding input section and the length of the sliding output section is equal to a preset distance.

[0027] In this implementation, the sliding input and sliding output of the gap device ensure that the gap device slides a preset distance with the drive wheel before driving the driven wheel to rotate.

[0028] In one implementation, the outer circumferential surface of the drive wheel is provided with a gear structure, the sliding input part includes a rack, and the drive wheel and the sliding input part are driven by meshing; or...

[0029] The driven wheel has a gear structure on its outer circumference, and the sliding output part includes a rack. The sliding output part and the driven wheel are driven by meshing.

[0030] In this implementation, the gear and rack combination has relatively high structural precision, which can improve the transmission precision of the compensation mechanism.

[0031] In one implementation, the compensation mechanism includes a torque limiter, which is coaxially fixed to the rotary input component of the reversing mechanism and is drively connected between the rotary input component of the reversing mechanism and the compensation mechanism. The torque limiter is used to control the compensation mechanism to slip when the torque of the rotary input component of the compensation mechanism is greater than a preset threshold.

[0032] In this implementation, when the torque of the compensation mechanism is too large, the torque limiter can decouple the drive wheel from the rotary input component of the reversing mechanism to protect the compensation mechanism.

[0033] In one implementation, the rotary input component of the compensation mechanism is sleeved around the torque limiter, and the torque limiter is a double ratchet torque limiter, a ball ratchet torque limiter, or a friction torque limiter.

[0034] In this implementation, the rotary input component of the compensation mechanism is located on the periphery of the torque limiter, which can improve the integration of the electromechanical braking device and reduce its size. Furthermore, using a double ratchet type torque limiter, a ball ratchet type torque limiter, or a friction type torque limiter can effectively achieve the function of the torque limiter.

[0035] In one implementation, there are two pushers, positioned on either side of the rotation axis of the rotary input component of the reversing mechanism, perpendicular to the displacement direction of the pushers. The compensation mechanism simultaneously drives the two pushers to move within the reversing mechanism, or the compensation mechanism simultaneously slips against the two pushers.

[0036] In this implementation, two pushers are arranged in parallel, which can generate a more stable pushing force on the brake and ensure the reliable operation of the brake.

[0037] In one implementation, the electromechanical braking device includes a transmission mechanism, which comprises a driving arm and a driven arm, wherein:

[0038] One end of the drive arm is connected to the motor shaft of the brake motor, and the drive arm is driven by the brake motor to move along the displacement direction of the pusher.

[0039] The other end of the drive arm is rotatably connected to the driven arm, and the end of the driven arm away from the drive arm is coaxially fixed to the rotary input component of the reversing mechanism.

[0040] In this implementation, the electromechanical braking device can also use a transmission mechanism to drive the rotation of the rotary input component of the reversing mechanism, which facilitates the arrangement of the brake motor and the reversing mechanism.

[0041] Secondly, this application provides an electromechanical braking system, which includes a brake and an electromechanical braking device provided in any of the above-described implementations. The brake includes a caliper frame and a floating caliper body that are slidably connected. The caliper frame is fixed to the vehicle frame, and the electromechanical braking device is fixed to the floating caliper body, wherein:

[0042] The sliding direction of the float caliper body relative to the caliper frame is parallel to the sliding direction of the pusher in the electromechanical braking device. The electromechanical braking device uses the pusher to push the float caliper body to slide relative to the caliper frame in order to brake the vehicle.

[0043] The electromechanical braking system provided in the second aspect of this application uses the electromechanical braking device provided in the first aspect of this application to drive the brake. Because the electromechanical braking device provided in the first aspect of this application has the ability to compensate for wear in one direction, the system accuracy of the electromechanical braking system of this application is improved.

[0044] In one implementation, the brake includes two friction pads, which are positioned on opposite sides of the vehicle's brake disc and slidably connected to the caliper bracket, wherein:

[0045] An electromechanical braking device drives a friction pad to slide toward the brake disc;

[0046] The electromechanical braking device drives another friction pad to slide from the other side toward the brake disc via the float caliper body.

[0047] In this implementation, the electromechanical braking device controls the relative displacement of the two friction pads to brake the vehicle, which can improve the internal stress state of the brake and ensure reliable braking.

[0048] In one implementation, the brake includes a retaining ring that abuts against two friction pads along the axial direction of the brake disc. The retaining ring is used to push the two friction pads away from each other after braking is completed.

[0049] In this implementation, the retaining ring is used to drive the two friction plates away from each other after braking is completed, so that the electromechanical braking device returns to its initial state.

[0050] Thirdly, this application provides a vehicle including wheels and an electromechanical braking system provided by any of the above implementations, wherein the sliding direction of the float caliper body relative to the caliper holder in the electromechanical braking system is parallel to the axial direction of the brake disc of the wheel.

[0051] The vehicle provided in the third aspect of this application uses the electromechanical braking system provided in the second aspect of this application for braking. Because the electromechanical braking device provided in the second aspect of this application has the ability to compensate for wear in one direction, it improves the safety and handling precision of the vehicle. Attached Figure Description

[0052] Figure 1 A schematic diagram illustrating the application scenario of the electromechanical braking system provided in this application embodiment in a vehicle;

[0053] Figure 2 This is a schematic diagram of the electromechanical braking system provided in an embodiment of this application;

[0054] Figure 3 This is an exploded view of the electromechanical braking system provided in the embodiments of this application;

[0055] Figure 4 A schematic diagram of the structure of the electromechanical braking device in the electromechanical braking system provided in the embodiments of this application;

[0056] Figure 5 A schematic diagram of the internal structure and coordination state of the reversing mechanism in the electromechanical braking device provided in the embodiments of this application;

[0057] Figure 6 A schematic diagram of another engagement state of the internal structure of the reversing mechanism in the electromechanical braking device provided in the embodiments of this application;

[0058] Figure 7 A schematic diagram of the internal structural coordination state of the transmission mechanism in the electromechanical braking device provided in the embodiments of this application;

[0059] Figure 8 A schematic diagram of another engagement state of the internal structure of the transmission mechanism in the electromechanical braking device provided in the embodiments of this application;

[0060] Figure 9 This is a schematic diagram of the compensation mechanism in the electromechanical braking device provided in the embodiments of this application;

[0061] Figure 10 A schematic diagram of the cooperation structure between the clutch output component of the compensation mechanism and the push component of the reversing mechanism in the electromechanical braking device provided in the embodiments of this application;

[0062] Figure 11 A schematic diagram of the structure of the overrunning clutch as the clutch output component of the compensation mechanism in the electromechanical braking device provided in the embodiments of this application;

[0063] Figure 12 A schematic diagram of the internal transmission structure of the compensation mechanism in the electromechanical braking device provided in the embodiments of this application;

[0064] Figure 13 A schematic diagram of the structure of the drive wheel of the compensation mechanism and the rotary input component of the reversing mechanism in the electromechanical braking device provided in the embodiment of this application;

[0065] Figure 14 A schematic diagram of the structure of the torque limiter of the compensation mechanism in the electromechanical braking device provided in the embodiment of this application, which is a ball ratchet type torque limiter;

[0066] Figure 15 A schematic diagram of the structure of the torque limiter of the compensation mechanism in the electromechanical braking device provided in the embodiment of this application, which is a friction-type torque limiter;

[0067] Figure 16 A schematic diagram of the structure of the torque limiter of the compensation mechanism in the electromechanical braking device provided in the embodiment of this application is a double ratchet type torque limiter;

[0068] Figure 17 The diagram shows the structure of the torque limiter of the compensation mechanism in the electromechanical braking device provided in the embodiment of this application, which is a double ratchet type torque limiter. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0070] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the described objects and have no sequential or technical meaning. The term "connection" in this application, unless otherwise specified, includes both direct and indirect connections. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are used only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0071] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above" or "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" or "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0072] This application provides an electromechanical braking device for unidirectional compensation of wear clearance. The electromechanical braking device includes a brake motor, a reversing mechanism and a compensation mechanism. The brake motor drives the rotary input component of the reversing mechanism to rotate. The reversing mechanism converts the rotational motion of the rotary input component into the displacement motion of the movable output component. The movable output component of the reversing mechanism is provided with a pushing component extending toward the brake. The movable output component of the reversing mechanism is displaced toward the brake and pushes the brake through the pushing component to brake the vehicle.

[0073] The rotary input component of the compensation mechanism rotates synchronously with the rotary input component of the reversing mechanism. The clutch output component of the compensation mechanism and the push component are driven in one direction. When the compensation mechanism is working in forward rotation mode, the compensation mechanism drives the push component to move within the reversing mechanism and increases the extension amount of the push component. When the compensation mechanism is working in reverse rotation mode, the compensation mechanism and the push component slip.

[0074] The electromechanical braking device of this application can compensate for the wear of the brake after long-term use and ensure that the braking stroke of the electromechanical braking device remains relatively constant, which is beneficial to improving the control accuracy of the electromechanical braking device.

[0075] This application provides an electromechanical braking system, which includes a brake and the aforementioned electromechanical braking device. The brake includes a caliper frame and a float caliper body that are slidably connected. The caliper frame is fixed to the vehicle frame, and the electromechanical braking device is fixed to the float caliper body, wherein:

[0076] The sliding direction of the float caliper body relative to the caliper frame is parallel to the sliding direction of the pusher in the electromechanical braking device. The electromechanical braking device uses the pusher to push the float caliper body to slide relative to the caliper frame in order to brake the vehicle.

[0077] The electromechanical braking system of this application, after employing an electromechanical braking device to drive the brake, possesses the ability to compensate for wear in one direction, thereby improving the system accuracy of the electromechanical braking system of this application.

[0078] This application provides a vehicle including wheels and the aforementioned electromechanical braking system, wherein the sliding direction of the float caliper body relative to the caliper holder in the electromechanical braking system is parallel to the axial direction of the brake disc of the wheel. The vehicle of this application exhibits high braking accuracy and a relatively constant braking stroke.

[0079] Please see Figure 1 The provided application provides a schematic diagram of an electromechanical braking system 300 in a vehicle.

[0080] like Figure 1As shown, the electromechanical braking system 300 provided in this application is installed at the wheel of a vehicle, specifically corresponding to the brake disc 401 of the wheel. The electromechanical braking system 300 includes a brake 200 and an electromechanical braking device 100. The brake 200 includes a caliper frame 201 and a floating caliper body 202. The caliper frame 201 is fixed to the vehicle frame, and the floating caliper body 202 is slidably connected to the caliper frame 201. The sliding direction of the floating caliper body 202 relative to the caliper frame 201 is parallel to the axial direction of the brake disc 401 of the wheel.

[0081] Please refer to the above. Figure 2 The present application provides a schematic diagram of the structure of an electromechanical braking system 300.

[0082] like Figure 2 As shown, the electromechanical braking device 100 in the electromechanical braking system 300 of this application is fixed to the float caliper body 202. The electromechanical braking device 100 can generate displacement through the movement of its internal mechanism, and the displacement direction of the electromechanical braking device 100 is parallel to the sliding direction of the float caliper body 202 relative to the caliper frame 201, that is, the displacement direction of the electromechanical braking device 100 is parallel to the axial direction of the brake disc 401. When the electromechanical braking device 100 is displaced, it generates a thrust to push the float caliper body 202 to slide relative to the caliper frame 201. The sliding direction of the float caliper body 202 is also towards the brake disc 401. The float caliper body 202 contacts the brake disc 401 and forms friction to achieve the braking effect of the electromechanical braking system 300 of this application on the brake disc 401.

[0083] For details, please refer to the following: Figure 3 The diagram shows an exploded view of the electromechanical braking system 300.

[0084] like Figure 3 As shown, the brake 200 includes two friction pads 203, which are arranged on opposite sides of the brake disc 401 along its axial direction. The two friction pads 203 are slidably connected to the caliper bracket 201, and the sliding direction of both friction pads 203 is parallel to the axial direction of the brake disc 401. One friction pad 203 is located on the same side of the brake disc 401 as the electromechanical braking device 100, and the electromechanical braking device 100 and this friction pad 203 are arranged adjacent to each other. The other friction pad 203 cooperates with the float caliper body 202. The float caliper body 202 includes an extension 2021, which extends from the electromechanical braking device 100 towards the other side of the brake disc 401, and cooperates with the friction pad 203 on the side of the brake disc 401 opposite to the electromechanical braking device 100.

[0085] Specifically, when the electromechanical braking system 300 of this application is working, the electromechanical braking device 100 generates displacement through internal movement, and pushes the friction pad 203 located on the same side toward the brake disc 401. After the friction pad 203 contacts the brake disc 401, it generates a reverse thrust. Under the action of the thrust, the electromechanical braking device 100 continues to move, which can drive the float caliper body 202 to slide relative to the caliper frame 201.

[0086] Because the direction of the thrust is from the brake disc 401 toward the electromechanical braking device 100, the sliding direction of the float caliper body 202 is also from the brake disc 401 toward the electromechanical braking device 100. This causes the extension 2021 of the float caliper body 202 to slide in the same direction. Since the extension 2021 of the float caliper body 202 is located on the side of the brake disc 401 away from the electromechanical braking device 100, the extension 2021 of the float caliper body 202 can also slide toward the brake disc 401.

[0087] Therefore, the extension 2021 of the float caliper body 202 can cooperate with the friction pad 203 located on the other side of the brake disc 401, and drive the friction pad 203 to slide towards the brake disc 401 until contact. That is, the electromechanical braking device 100 of this application can drive the two friction pads 203 to move relative to each other from both sides of the brake disc 401 and approach each other through the movement of its internal mechanism. The two friction pads 203 respectively contact the brake disc 401 and generate friction, thereby achieving the effect of braking the vehicle wheels by the electromechanical braking system 300 of this application.

[0088] The electromechanical braking system 300 of this application can drive the friction pads 203 to contact the brake disc 401 of the wheel through the displacement movement of the electromechanical braking device 100 to brake the vehicle. The relative displacement of the two friction pads 203 to brake the vehicle can improve the stress state of the brake disc 401 and the internal stress state of the brake 200, ensuring reliable braking by the brake 200.

[0089] Please continue reading Figure 3 In one embodiment, the brake 200 further includes a retaining ring 204. The retaining ring 204 abuts against the two friction pads 203 along the axial direction of the brake disc 401, and the retaining ring 204 provides a pushing force away from the two friction pads 203. It can be understood that when the electromechanical braking system 300 of this application completes the braking operation, the two friction pads 203 are displaced away from the brake disc 401 under the pushing force of the retaining ring 204, thereby releasing the braking action of the electromechanical braking system 300 on the brake disc 401 and restoring the electromechanical braking device 100 to its initial state.

[0090] Please see Figure 4 The provided application provides a structural schematic diagram of an electromechanical braking device 100.

[0091] like Figure 4 As shown, the electromechanical braking device 100 of this application includes a brake motor 10, a reversing mechanism 20, and a compensation mechanism 30. The reversing mechanism 20 includes a rotary input component 21 and a moving output component 22. The rotary input component 21 of the reversing mechanism 20 is rotatably connected to the float caliper body 202, and is also drively connected to the brake motor 10. The brake motor 10 drives the rotary input component 21 of the reversing mechanism 20 to rotate within the float caliper body 202.

[0092] The moving output component 22 of the reversing mechanism 20 is slidably connected to the float clamp body 202. The moving output component 22 of the reversing mechanism 20 is connected to the rotary input component 21. The moving output component 22 of the reversing mechanism 20 slides in the float clamp body 202 as the rotary input component 21 rotates. That is, the reversing mechanism 20 converts the rotational motion output by the brake motor 10 into the sliding motion output by the reversing mechanism 20 through the cooperation of the rotary input component 21 and the moving output component 22.

[0093] The sliding direction of the moving output member 22 of the reversing mechanism 20 relative to the float caliper body 202 is parallel to the axial direction of the brake disc 401. The brake motor 10 drives the moving output member 22 to move toward the brake disc 401 via the rotation input member 21 of the reversing mechanism 20. The moving output member 22 of the reversing mechanism 20 is also provided with a pusher 23. The length direction of the pusher 23 is parallel to the axial direction of the brake disc 401. One end of the pusher 23 is movably connected to the moving output member 22 of the reversing mechanism 20, and the other end of the pusher 23 extends out of the moving output member 22 and toward the brake 200. That is, the moving output member 22 of the reversing mechanism 20 is provided with a pusher 23 extending toward the brake 200. When the moving output member 22 of the reversing mechanism 20 moves toward the brake 200, the pusher 23 contacts the friction pad 203 of the brake 200 and pushes the brake 200 to brake the vehicle.

[0094] Please see Figure 5 and Figure 6 The diagram shows the internal structure of the reversing mechanism 20.

[0095] In one embodiment, the rotary input component 21 of the reversing mechanism 20 includes a cam, and the movable output component 22 of the reversing mechanism 20 includes a slider. The pusher 23 is a screw rotatably connected within the slider. In the illustrated embodiment, the slider has a through hole 221 that extends through the slider along a direction perpendicular to its displacement. The cam extends into the through hole 221, and the axis of rotation of the cam is parallel to the axis of the through hole 221.

[0096] The sliding component is also provided with a screw hole 222 (see Figure 4The screw hole 222 penetrates the slider along the displacement direction parallel to the slider. The screw engages in the screw hole 222, and the axis of rotation of the screw is parallel to the displacement direction of the slider. One end of the screw extends toward the friction plate 203 along the displacement direction of the slider. The friction plate 203 then abuts against the end of the screw under the thrust of the retaining spring 204.

[0097] exist Figure 5 When the electromechanical braking device 100 shown is in its initial state, along the displacement direction of the sliding member, the portion of the cam with the shorter radius of its outer circumference is in contact with the inner wall of the through hole 221. At this time, the sliding member is relatively far away from the brake disc 401 along its own displacement direction, and the friction plate 203 is spaced apart from the brake disc 401.

[0098] like Figure 6 As shown, when the brake motor 10 drives the cam to rotate within the through hole 221, the radius of the part of the cam that contacts the inner wall of the through hole 221 gradually increases along the displacement direction of the slider. The cam thus pushes the inner wall of the through hole 221, driving the slider to move towards the brake disc 401. Driven by the slider, the screw pushes the friction plate 203 towards the brake disc 401 and into contact.

[0099] In this embodiment, the rotary input component 21 and the movable output component 22 of the reversing mechanism 20, through the cooperation of a cam and a slider, achieve the effect of converting the rotational motion of the brake motor 10 into the displacement motion of the movable output component 22. The electromechanical braking device 100 of this application is not limited to the cam and slider cooperation method. In other embodiments, the rotary input component 21 and the movable output component 22 of the reversing mechanism 20 can also achieve the reversing action through a gear and rack, a linkage mechanism, a lead screw and nut, etc., which can similarly convert the rotational motion of the brake motor 10 into the displacement motion of the movable output component 22 and drive the brake 200 to brake the vehicle.

[0100] On the other hand, in some embodiments, the slider is further provided with a slider 223, which is located within the through hole 221 and abuts against the inner wall of the cam and the through hole 221. The slider 223 can slide within the through hole 221 and transmit the radial force of the cam to the slider. The slider 223 can be disassembled and replaced relative to the slider, so that after long-term use of the electromechanical braking device 100 and wear between the cam and the slider, the slider 223 can be replaced to compensate for wear and tear, thus achieving quick maintenance of the electromechanical braking device 100.

[0101] exist Figure 4In the schematic structure, the axis of the brake motor 10 is perpendicular to the axial direction of the brake disc 401, and the axis of the brake motor 10 is also perpendicular to the rotation axis of the rotary input member 21 of the reversing mechanism 20. The length direction of the brake motor 10 is parallel to the width direction of the float caliper body 202, making the structure of the electromechanical braking device 100 relatively compact and conducive to the miniaturization of the electromechanical braking system 300. However, the axis of the brake motor 10 is perpendicular to the rotation axis of the rotary input member 21, which is not conducive to the brake motor 10 driving the rotary input member 21 of the reversing mechanism 20 to rotate. Therefore, in some embodiments, the electromechanical braking device 100 may also include a transmission mechanism 40. The transmission mechanism 40 is drively connected between the brake motor 10 and the reversing mechanism 20, and is used to transmit the rotational motion of the brake motor 10 to the reversing mechanism 20 and drive the rotary input member 21 of the reversing mechanism 20 to rotate.

[0102] For details, please see Figure 7 and Figure 8 The diagram illustrates the transmission mechanism 40, which includes a drive arm 41 and a driven arm 42. One end of the drive arm 41 is connected to the motor shaft 11 of the brake motor 10, and is driven by the motor shaft 11 to move along the displacement direction of the pusher 23. That is, the length direction of the drive arm 41 is parallel to the displacement direction of the pusher 23. The other end of the drive arm 41 is rotatably connected to the driven arm 42, and the end of the driven arm 42 away from the drive arm 41 is coaxially fixed to the rotary input component 21 of the reversing mechanism 20.

[0103] exist Figure 7 and Figure 8 In the schematic diagram, the motor shaft 11 of the brake motor 10 is equipped with a gear, which meshes with a rack at the end of the drive arm 41 to drive the drive arm 41 to move along the displacement direction of the pusher 23. One end of the driven arm 42 rotates and moves with the drive arm 41, thereby driving the other end of the driven arm 42 to rotate. The rotation input 21 of the reversing mechanism 20 can rotate coaxially with the driven arm 42.

[0104] The rack on the drive arm 41 can also rotate around the end of the drive arm 41, thereby ensuring reliable meshing between the rack of the drive arm 41 and the gear on the motor shaft 11 when the drive arm 41 and the driven arm 42 rotate relative to each other.

[0105] In the structure shown in the attached figures, there are two pushing members 23. Along a direction perpendicular to the displacement of the pushing members 23, the two pushing members 23 are positioned on either side of the rotation axis of the rotary input member 21 of the reversing mechanism 20. That is, the two pushing members 23 contact the friction plate 203 along its length and push the friction plate 203 toward the brake disc 401. The thrust on the friction plate 203 is more uniform, and the displacement movement of the friction plate 203 is more stable.

[0106] Please see Figure 9 The provided application provides a schematic diagram of the structure of the compensation mechanism 30 in an electromechanical braking device 100.

[0107] like Figure 9 As shown, the compensation mechanism 30 includes a rotary input element, and in Figure 9 In the schematic diagram, the rotary input component of the compensation mechanism 30 includes a drive wheel 31. The drive wheel 31 is coaxially driven with the rotary input component 21 of the reversing mechanism 20. The compensation mechanism 30 also includes a clutch output component 32, a driven wheel 33, and a gap 34. The clutch output component 32 of the compensation mechanism 30 is driven unidirectionally with the pusher 23, and the driven wheel 33 and the gap 34 are connected between the drive wheel 31 and the clutch output component 32. Thus, the compensation mechanism 30 can drive the clutch output component 32 to rotate by rotating synchronously with the rotary input component 21 of the reversing mechanism 20 through the rotary input component (drive wheel 31). The clutch output component 32 then drives the pusher 23 to move unidirectionally in the moving output component 22 of the reversing mechanism 20 to increase the extension amount.

[0108] Please see details. Figure 10 The diagram shows the cooperation structure between the clutch output component 32 of the compensation mechanism 30 and the push component 23 of the reversing mechanism 20.

[0109] In one embodiment, the clutch output component 32 of the compensation mechanism 30 includes a one-way clutch. The one-way clutch is coaxially driven with the pusher 23. In this embodiment, the one-way clutch is disposed in the inner hole 231 of the pusher 23. The rotation axis of the one-way clutch coincides with the axis of the inner hole 231 of the pusher 23. The one-way clutch can be a ratchet pawl clutch or an overrunning clutch. The one-way clutch has the function of one-way transmission.

[0110] Figure 11 The following explanation uses a one-way clutch as an example of an overrunning clutch.

[0111] like Figure 11 As shown, the one-way clutch includes an annular component 321, a movable body 322, and an elastic component 323. The annular component 321 includes a plurality of grooves 3211, which are arranged circumferentially along the annular component 321, with the opening of each groove 3211 facing the inner circumferential surface of the annular component 321. The groove bottom depth of each groove 3211 is different. Along the circumferential direction of the annular component 321, the deeper groove bottoms of each groove 3211 are located on the same side of the groove 3211, and the shallower groove bottoms of each groove 3211 are located on the opposite side of the groove 3211.

[0112] Movable bodies 322 and elastic elements 323 are paired and disposed within grooves 3211 of the annular member 321. Along the radial direction of the annular member 321, the diameter of the movable body 322 is greater than the depth of the shallower bottom of the groove 3211 and less than the depth of the deeper bottom of the groove 3211. Each elastic element 323 is located on the deeper side of the groove 3211 relative to its corresponding movable body 322. The elastic element 323 is used to push the movable body 322 towards the shallower side of the groove 3211.

[0113] When the inner circumferential surface of the annular member 321 extends into the rotating shaft 331 (the rotating shaft of the driven wheel 33), the rotating shaft 331 rotates clockwise. The rotating shaft 331 rubs against each movable body 322, causing each movable body 322 to rotate towards the shallower side of the groove bottom 3211. Under the action of friction, the movable body 322 continues to abut against the sidewall of the groove 3211, pushing the annular member 321 and the rotating shaft 331 to rotate clockwise synchronously.

[0114] The outer circumferential surface of the annular member 321 can fit against the inner circumferential surface of the inner hole 231 of the pusher member 23. When the annular member 321 rotates forward (which can be understood as the forward rotation of a one-way clutch), its outer circumferential surface rubs against the inner circumferential surface of the inner hole 231 (or through splines, drive pins, etc.), thereby driving the pusher member 23 to rotate synchronously forward within the moving output member 22 of the reversing mechanism 20. The pusher member 23 (such as the screw mentioned above) is able to rotate and increase its extension toward the brake 200.

[0115] That is, as the rotary input component of the compensation mechanism 30 rotates synchronously with the rotary input component 21 of the reversing mechanism 20 in one direction, it can drive the clutch output component 32 of the compensation mechanism 30 to rotate forward, and drive the push component 23 to rotate synchronously in the moving output component 22 of the reversing mechanism 20, so as to increase the extension of the push component 23 toward the brake 200.

[0116] And when Figure 11 When the overrunning clutch reverses (in this embodiment, reversal refers to the rotation of the rotating shaft 331 from the shallower side of the bottom of each groove 3211 towards the deeper side), the rotating shaft 331 rubs against each movable body 322, causing each movable body 322 to rotate towards the deeper side of the bottom of the groove 3211. Under the action of friction, the movable body 322 compresses the elastic element 323 and releases the frictional engagement with the rotating shaft 331, allowing the rotating shaft 331 to slip against each movable body 322, and causing the clutch output component 32 of the compensation mechanism 30 to slip as a whole.

[0117] When the rotating shaft 331 reverses, the ring member 321 will not rotate with the rotating shaft 331. The push member 23 is stationary relative to the moving output member 22 of the reversing mechanism 20, and the extension amount of the push member 23 remains unchanged.

[0118] That is, as the rotary input component of the compensation mechanism 30 rotates synchronously with the rotary input component 21 of the reversing mechanism 20 in another direction, it drives the clutch output component 32 of the compensation mechanism 30 to reverse, the clutch output component 32 slips with the push component 23, and the extension amount of the push component 23 and the moving output component 22 of the reversing mechanism 20 remains unchanged.

[0119] Therefore, by controlling the rotation direction of the rotary input component of the compensation mechanism 30 and the rotary input component 21 of the reversing mechanism 20, the compensation mechanism 30 can operate in either forward or reverse rotation mode. In forward rotation mode, the one-way clutch rotates forward, causing the pusher 23 to extend out of the sliding member; in reverse rotation mode, the one-way clutch rotates in reverse and slips between itself and the pusher 23. When the compensation mechanism 30 operates in reverse rotation mode, the pusher 23 does not rotate in reverse with the one-way clutch, meaning it does not retract into the sliding member, thus achieving a unidirectional feed effect relative to the sliding member.

[0120] That is, in the electromechanical braking device 100 of this application, the compensation mechanism 30 works in the forward rotation mode, the compensation mechanism 30 drives the pusher 23 to move in the reversing mechanism 20 and increases the extension of the pusher 23; the compensation mechanism 30 works in the reverse rotation mode, the compensation mechanism 30 slips between the pusher 23 and the pusher 23.

[0121] The electromechanical braking device 100 of this application is used to drive the brake 200 to brake a vehicle. The reversing mechanism 20 of the electromechanical braking device 100 is used to convert the rotational motion of the brake motor 10 into the displacement motion of the moving output member, and pushes the brake 200 to brake through the push member 23 on the moving output member 22.

[0122] The electromechanical braking device 100 of this application also allows the rotary input component of the compensation mechanism 30 to rotate synchronously with the rotary input component 21 of the reversing mechanism 20, so that when the rotary input component 21 of the reversing mechanism 20 rotates with the brake motor 10, it can drive the rotary input component of the compensation mechanism 30 to rotate. The clutch output component 32 of the compensation mechanism 30 is used to drive the push component 23 to move relative to the moving output component 22, so as to adjust the extension amount of the push component 23 relative to the moving output component 22.

[0123] During the operation of the electromechanical braking system 300 of this application, the friction pad 203 and the brake disc 401 continuously rub against each other, resulting in frictional wear and tear, i.e., the gap between the friction pad 203 and the brake disc 401 gradually increases. The electromechanical braking device 100 of this application, through the unidirectional drive of the pushing member 23 by the compensation mechanism 30, can continuously increase the extension of the pushing member 23 relative to the sliding member, thereby compensating for the wear between the friction pad 203 and the brake disc 401. The braking stroke of the electromechanical braking device 100 is kept relatively constant, which is beneficial to improving the control accuracy of the electromechanical braking device 100. The electromechanical braking system 300 and the vehicle provided in this application, by utilizing the electromechanical braking device 100 provided in this application to drive the brakes, also possess the ability to unidirectionally compensate for wear, thus improving the system accuracy of the electromechanical braking system 300 and the safety and handling accuracy of the vehicle.

[0124] It should be noted that, in the above-described overrunning clutch structure, the groove 3211 is provided on the inner circumferential surface of the annular member 321, and the movable body 322 cooperates with the rotating shaft 331 extending into the annular member 321 to achieve a one-way clutch transmission function. In some other embodiments, the groove 3211 of the annular member 321 can also be provided on the outer circumferential surface, and the movable body 322 cooperates with the inner circumferential surface of the inner hole 231 of the pusher 23, which can also achieve the one-way clutch transmission function of the overrunning clutch. In this case, the rotating shaft 331 extending into the annular member 321 rotates synchronously with the annular member 321 through friction.

[0125] On the other hand, the clutch output component 32 of the compensation mechanism 30 in the above embodiment is described using an overrunning clutch as an example. In the prior art, one-way clutches such as ratchet and pawl clutches can also achieve similar one-way clutch transmission functions. The embodiments of this application will not be described in detail here.

[0126] Understandable, such as Figure 11 The one-way clutch shown is located in the inner hole 231 of the pusher 23, which can improve the integration of the electromechanical braking device 100, reduce the volume of the compensation mechanism 30, and thus control the overall size of the electromechanical braking system 300, so as to facilitate the arrangement of the electromechanical braking system 300 inside the vehicle.

[0127] In an embodiment where the moving output component 22 of the reversing mechanism 20 is provided with two pushers 23, the rotary input component (drive wheel 31) of the compensation mechanism 30 also simultaneously drives the two pushers 23 to move synchronously within the reversing mechanism 20, or the compensation mechanism 30 simultaneously slips with the two pushers 23, so as to ensure that the moving output component 22 of the reversing mechanism 20 can push the brake 200 more smoothly and ensure the reliable operation of the brake 200.

[0128] Please see Figure 12 The diagram shows the internal transmission structure of the compensation mechanism 30.

[0129] As mentioned above, the driven wheel 33 of the compensation mechanism 30 is coaxially driven with the one-way clutch via the rotating shaft 331. Along the displacement direction of the pusher 23, the driven wheel 33 is located on the side of the one-way clutch away from the brake 200. The gap 34 of the compensation mechanism 30 is driven between the drive wheel 31 and the driven wheel 33.

[0130] Specifically, the drive wheel 31 drives the gapper 34 to slide relative to the pusher 23, and the sliding direction of the gapper 34 is perpendicular to the displacement direction of the pusher 23 and simultaneously perpendicular to the rotation axis of the drive wheel 31. (Please refer to [reference needed]). Figure 9 The gap device 34 includes a sliding input part 341 and a sliding output part 342. The sliding input part 341 is connected to the drive wheel 31 for transmission, and the sliding output part 342 is used to engage with the driven wheel 33 and drive the driven wheel 33 to rotate.

[0131] exist Figure 9 and Figure 12 In the schematic diagram, because the rotation axis of the drive wheel 31 is perpendicular to the rotation axis of the driven wheel 33, the cross-sectional shape of the gap 34 is "L" shaped, and the sliding input part 341 and the sliding output part 342 of the gap 34 are also arranged in a relatively perpendicular direction.

[0132] The drive wheel 31 and the sliding input portion 341 of the spacer 34 can be connected by a gear and rack mechanism. The drive wheel 31 has a gear on its exterior, and the sliding input portion 341 is configured as a rack structure along its length. The gear on the drive wheel 31 meshes with the rack of the sliding input portion 341, creating the effect that the drive wheel 31 drives the spacer 34 to slide along its length. In other embodiments, the drive wheel 31 and the sliding input portion 341 can also be connected by a friction wheel, belt drive, or chain drive.

[0133] In one embodiment, the length direction of the sliding input portion 341 is parallel to the length direction of the sliding output portion 342, and the length dimension of the sliding input portion 341 is greater than the length dimension of the sliding output portion 342. When the drive wheel 31 drives the gap 34 to slide through the sliding input portion 341, the sliding output portion 342 and the driven wheel 33 are not in contact. After the gap 34 slides a preset distance, the sliding output portion 342 engages with the driven wheel 33 again, and the driven wheel 33 then drives the one-way clutch to rotate forward.

[0134] In this embodiment, before the gap 34 engages with the driven wheel 33, the transmission between the drive wheel 31 of the compensation mechanism 30 and the gap 34 will not cause the one-way clutch to rotate forward. At this time, the rotary input component 21 of the reversing mechanism 20 has already driven the movable output component 22 to move a preset distance toward the brake 200. That is, when the electromechanical braking device 100 of this application is working normally and the wear between the friction plate 203 and the brake disc 401 has not increased, after the brake motor 10 drives the movable output component 22 of the reversing mechanism 20 to move a preset distance, the friction plate 203 can contact the brake disc 401 and achieve braking. At this time, the compensation mechanism 30 does not need to adjust the extension of the pusher 23, and the electromechanical braking device 100 can achieve the braking function.

[0135] By setting a preset sliding distance for the gap 34, the clutch output 32 of the compensation mechanism 30 can be rotated forward, thus controlling the timing of the compensation mechanism 30's intervention. When the wear between the friction pad 203 and the brake disc 401 increases, the pusher 23 may not push the friction pad 203 into place after the gap 34 has slid the preset distance. At this time, the sliding output 342 of the gap 34 will then drive the clutch output 32 of the compensation mechanism 30 to rotate forward again, increasing the extension of the pusher 23. This compensates for the wear between the friction pad 203 and the brake disc 401, ensuring that the braking stroke of the electromechanical braking device 100 remains relatively constant.

[0136] Understandably, the difference between the length of the sliding input section 341 and the length of the sliding output section 342 is equal to the aforementioned preset distance. The arrangement of the sliding input section 341 and the sliding output section 342 of the gap device 34 ensures that the gap device 34 drives the driven wheel 33 to rotate after sliding the drive wheel 31 a preset distance.

[0137] Understandably, a gear structure can also be provided on the outer circumferential surface of the driven wheel 33, cooperating with the sliding output part 342, which includes a rack, and the sliding output part 342 and the driven wheel 33 are driven by meshing. The structure of the gear and rack engagement has relatively high precision, which can improve the transmission accuracy of the compensation mechanism 30. In other embodiments, the sliding output part 342 and the driven wheel 33 can also be connected by a friction wheel, belt drive, or chain drive.

[0138] In one embodiment, the compensation mechanism 30 includes a torque limiter 35. See also... Figure 13 The diagram illustrates this. The torque limiter 35 is coaxially fixed to the rotary input component 21 of the reversing mechanism 20, and is drively connected between the rotary input component 21 of the reversing mechanism 20 and the rotary input component (drive wheel 31) of the compensation mechanism 30. The torque limiter 35 is used to control the compensation mechanism 30 to slip relative to the reversing mechanism 20 when the torque borne by the rotary input component of the compensation mechanism 30 exceeds a preset threshold.

[0139] Specifically, during the process of the reversing mechanism 20 driving the friction pad 203 to move towards the brake disc 401, when the friction pad 203 pushed by the pusher 23 contacts the brake disc 401, the compensation mechanism 30 has already moved into position and does not need to rotate further with the reversing mechanism 20. However, the reversing mechanism 20 still needs to work further to push the float caliper body 202 to slide and drive the friction pad 203 on the other side of the brake disc 401 to contact the brake disc 401. That is, during the entire process of the reversing mechanism 20 participating in the braking of the electromechanical braking system 300, the compensation mechanism 30 only needs to be synchronously driven with the reversing mechanism 20 in some stages, and the compensation mechanism 30 needs to slip with the reversing mechanism 20 in the subsequent stages.

[0140] Understandably, after the friction plate 203 pushed by the pusher 23 comes into contact with the brake disc 401, the rotational torque of the rotary input component (drive wheel 31) of the compensation mechanism 30 increases. At this time, the torque limiter 35 can intervene to make the rotary input component of the compensation mechanism 30 slip with the rotary input component 21 of the reversing mechanism 20, so as to protect the compensation mechanism 30.

[0141] The torque limiter 35 can be a double ratchet torque limiter, a ball ratchet torque limiter, or a friction torque limiter. Figure 14 The working principle of a ball-loaded ratchet torque limiter is illustrated. Specifically, Figure 14 The torque limiter 35 shown includes a central column 351 and an outer wheel. The outer wheel can simultaneously serve as the drive wheel 31 of the compensation mechanism 30. That is, the rotation input component of the compensation mechanism 30 can be fitted around the torque limiter 35 to improve the integration of the electromechanical braking device 100 and reduce its size.

[0142] The inner circumferential surface of the drive wheel 31 is provided with a ring-shaped ratchet structure. The central column 351 is fixedly connected to the rotation shaft of the rotary input component 21 of the reversing mechanism 20. The central column 351 is also provided with a through hole 3511, which extends radially along the drive wheel 31. Multiple through holes 3511 are arranged circumferentially along the drive wheel 31.

[0143] Inside each through-hole 3511, there is a matching spring 353 and a ball 352. Along the radial direction of the drive wheel 31, the spring 353 is closer to the rotation center of the drive wheel 31 than the ball 352. The spring 353 is used to push the ball 352 to slide toward the ratchet on the inner circumferential surface of the drive wheel 31.

[0144] When the friction plate 203 pushed by the pusher 23 is not in contact with the brake disc 401, the torque borne by the clutch output component 32 of the compensation mechanism 30 is relatively small. During the rotation of the center column 351 with the rotary input component 21, the spring 353 can hold the ball 352 in contact with the inner circumferential surface of the drive wheel 31. The ball 352 drives the drive wheel 31 to rotate synchronously by pushing the ratchet on the inner circumferential surface of the drive wheel 31.

[0145] When the friction plate 203 pushed by the pusher 23 contacts the brake disc 401, the torque borne by the clutch output component 32 of the compensation mechanism 30 is relatively large. As the center column 351 rotates with the rotary input component 21 of the reversing mechanism 20, the torque increases. The elastic force provided by the spring 353 no longer supports the ball 352 to push the ratchet on the inner circumferential surface of the drive wheel 31. The ball 352 and the ratchet on the inner circumferential surface of the drive wheel 31 begin to slip. The drive wheel 31 and the center column 351 no longer form a synchronous rotational engagement. The rotary input component 21 of the reversing mechanism 20 can continue to rotate to achieve braking, while the compensation mechanism 30 is in a relatively stationary state.

[0146] There are many existing technologies that can realize the function of torque limiter 35, such as Figure 15 The friction-type torque limiter shown utilizes the interaction between two friction wheels 354. When the torque is relatively small, the two friction wheels 354 rotate coaxially due to friction, causing the drive wheels 31 on both sides of the friction wheels and the central column 351 to rotate synchronously. When the torque is relatively large, the two friction wheels 354 begin to slip, and the drive wheels 31 and the central column 351 also slip. A compression spring 355 provides a mutual resisting frictional thrust between the two friction wheels 354.

[0147] Figure 16 and Figure 17 This illustrates the working mode of the double ratchet torque limiter. The double ratchet torque limiter utilizes the engagement between two meshing ratchet wheels 356. When the torque is relatively small, the two ratchet wheels 356 mesh together and rotate coaxially (e.g., ...). Figure 16 As shown), so that the drive wheels 31 on both sides of the ratchet 356 and the central column 351 rotate synchronously; when the torque is relatively large, the two ratchet wheels 356 begin to slip (as shown). Figure 17 As shown, slippage is achieved between the drive wheel 31 and the central column 351. The two ratchet wheels 356 can also be provided with a thrust through mutual friction via a compression spring 355.

[0148] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of protection of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An electromechanical braking device for unidirectional compensation of wear clearance, characterized in that, The electromechanical braking device includes a brake motor, a reversing mechanism, and a compensation mechanism. The brake motor drives the rotary input component of the reversing mechanism to rotate. The reversing mechanism converts the rotational motion of the rotary input component into the displacement motion of the sliding output component. The sliding output component of the reversing mechanism is provided with a sliding component and a pushing component extending toward the brake. The sliding output component of the reversing mechanism is displaced toward the brake and drives the pushing component through the sliding component to push the brake to brake the vehicle. The rotary input component of the compensation mechanism includes a drive wheel, and the rotary input component of the reversing mechanism includes a cam. The drive wheel and the cam are coaxially driven, and the rotation axis of the cam is perpendicular to the displacement direction of the slider. The clutch output component of the compensation mechanism is unidirectionally driven by the push component. The drive wheel is used to drive a gap to slide a preset distance and then drive the clutch output component. The sliding direction of the gap is perpendicular to the displacement direction of the push component and also perpendicular to the rotation axis of the drive wheel. The compensation mechanism operates in forward rotation mode, driving the pusher to move within the reversing mechanism and increasing the extension amount of the pusher; the compensation mechanism operates in reverse rotation mode, slipping between the compensation mechanism and the pusher.

2. The electromechanical braking device as described in claim 1, characterized in that, The pushing component is a screw rotatably connected within the sliding component. The brake motor drives the cam to rotate, and the cam drives the sliding component to move the screw toward the brake, wherein: The rotation axis of the screw is parallel to the displacement direction of the slider.

3. The electromechanical braking device as described in claim 1, characterized in that, The clutch output component of the compensation mechanism includes a one-way clutch, wherein: The drive wheel is used to drive the one-way clutch to rotate; The one-way clutch is coaxially driven with the pusher. The compensation mechanism operates in forward rotation mode, where the one-way clutch rotates forward and drives the pusher to extend out of the sliding member; the compensation mechanism operates in reverse rotation mode, where the one-way clutch rotates in reverse and slips between itself and the sliding member.

4. The electromechanical braking device as described in claim 3, characterized in that, The one-way clutch is disposed in the inner hole of the pusher, and the one-way clutch is a ratchet pawl clutch or an overrunning clutch.

5. The electromechanical braking device as described in claim 3, characterized in that, The compensation mechanism includes a driven wheel, which is coaxially driven with the one-way clutch. Along the displacement direction of the pusher, the driven wheel is located on the side of the one-way clutch away from the brake. The gap is driven between the drive wheel and the driven wheel, wherein: The drive wheel is used to drive the gapper to slide relative to the pusher; After sliding a preset distance, the gap engages with the driven wheel and drives the driven wheel to rotate the one-way clutch in the forward direction.

6. The electromechanical braking device as described in claim 5, characterized in that, The gapper includes a sliding input section and a sliding output section. The sliding input section is connected to the drive wheel, and the sliding output section is used to engage with the driven wheel, wherein: The length direction of the sliding input section is parallel to the length direction of the sliding output section; The length of the sliding input section is greater than the length of the sliding output section, and the difference between the length of the sliding input section and the length of the sliding output section is equal to the preset distance.

7. The electromechanical braking device as described in claim 6, characterized in that, The outer circumferential surface of the drive wheel is provided with a gear structure, and the sliding input part includes a rack; the drive wheel and the sliding input part are driven by meshing; or... The driven wheel has a gear structure on its outer circumferential surface, and the sliding output part includes a rack. The sliding output part and the driven wheel are driven by meshing.

8. The electromechanical braking device as described in claim 1, characterized in that, The compensation mechanism includes a torque limiter, which is coaxially fixed to the rotary input component of the reversing mechanism and is connected in a transmission manner between the rotary input component of the reversing mechanism and the compensation mechanism. The torque limiter is used to control the compensation mechanism to slip when the torque of the rotary input component of the reversing mechanism is greater than a preset threshold.

9. The electromechanical braking device as described in claim 8, characterized in that, The rotary input component of the reversing mechanism is sleeved around the torque limiter, and the torque limiter is a double ratchet torque limiter, a ball ratchet torque limiter, or a friction torque limiter.

10. The electromechanical braking device according to any one of claims 1-9, characterized in that, The number of the pushers is two. Along the displacement direction perpendicular to the pushers, the two pushers are arranged on both sides of the rotation axis of the rotary input component of the reversing mechanism. The compensation mechanism simultaneously drives the two pushers to move within the reversing mechanism, or the compensation mechanism simultaneously slips with the two pushers.

11. The electromechanical braking device according to any one of claims 1-9, characterized in that, The electromechanical braking device includes a transmission mechanism, which comprises a driving arm and a driven arm, wherein: One end of the drive arm is connected to the motor shaft of the brake motor, and the drive arm is driven by the brake motor to move along the displacement direction of the pusher. The other end of the drive arm is rotatably connected to the driven arm, and the end of the driven arm away from the drive arm is coaxially fixed to the rotary input component of the reversing mechanism.

12. An electromechanical braking system, characterized in that, The electromechanical braking system includes a brake and an electromechanical braking device according to any one of claims 1-11, wherein the brake includes a slidably connected caliper and a floating caliper body, the caliper being fixed to the vehicle frame, and the electromechanical braking device being fixed to the floating caliper body, wherein: The sliding direction of the float caliper body relative to the caliper frame is parallel to the sliding direction of the pusher in the electromechanical braking device. The electromechanical braking device uses the pusher to push the float caliper body to slide relative to the caliper frame to brake the vehicle.

13. The electromechanical braking system as described in claim 12, characterized in that, The brake includes two friction pads, which are positioned on opposite sides of the vehicle brake disc and slidably connected to the caliper bracket, wherein: The electromechanical braking device drives one of the friction pads to slide toward the brake disc; The electromechanical braking device drives another friction pad to slide from the other side toward the brake disc via the float caliper body.

14. The electromechanical braking system as described in claim 13, characterized in that, The brake includes a retaining ring that rests between two friction pads along the axial direction of the brake disc. The retaining ring is used to push the two friction pads away from each other after braking is completed.

15. A vehicle, characterized in that, Includes a wheel and an electromechanical braking system as described in any one of claims 12-14, wherein the sliding direction of the float caliper body relative to the caliper holder in the electromechanical braking system is parallel to the axial direction of the brake disc of the wheel.

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