Electromechanical brake device and vehicle

Abstract

The embodiment of the present application provides an electromechanical brake device and a vehicle. The electromechanical brake device comprises a brake motor and a locking device. One end of a motor shaft of the brake motor is used for driving a brake, and the locking device is used for locking the brake motor through the other end of the motor shaft of the brake motor. The locking device comprises a clutch, an axial moving piece and a driving motor. The clutch is sleeved on the other end of the motor shaft of the brake motor. The axial moving piece is used for moving axially relative to the clutch and controlling the clutch to lock or release the other end of the motor shaft of the brake motor. The driving motor is used for driving the axial moving piece to move away from or towards the clutch. The electromechanical brake device and the vehicle provided by the embodiment of the present application can lock the brake motor through the clutch when parking brake is performed, and the brake motor does not need to be in a working state for a long time, so that the reliability of the electromechanical brake device is improved, and the safety of the vehicle can be improved.

Description

Technical Field

[0001] This application relates to the field of electromechanical braking technology, and in particular to an electromechanical braking device and a vehicle. Background Technology

[0002] Electro-mechanical braking (EMB) utilizes an electric motor-driven mechanical structure to clamp friction pads onto a brake disc, serving both service and parking braking purposes. Current EMB systems require a brake motor to continuously drive the mechanical structure to clamp the brake disc during parking. However, prolonged operation of the brake motor can lead to malfunctions, power outages, or other unforeseen circumstances, causing the friction pads to fail to clamp the brake disc, thus compromising vehicle safety during parking. Therefore, ensuring the reliability of electro-mechanical braking systems is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This application provides an electromechanical braking device and a vehicle. When applying the parking brake, the brake motor can be locked by a clutch, eliminating the need for the brake motor to be in a working state for an extended period. This improves the reliability of the electromechanical braking device and, consequently, enhances vehicle safety.

[0004] This application provides an electromechanical braking device, comprising a brake motor and a locking device. One end of the motor shaft of the brake motor is used to drive a brake, which is used to brake a vehicle. The locking device is used to lock the brake motor via the other end of the motor shaft. The locking device includes a clutch, an axially moving member, and a drive motor. The clutch is sleeved on the other end of the motor shaft of the brake motor. The axially moving member is used to move relative to the clutch along the axial direction of the brake motor and to control the clutch to lock or release the other end of the motor shaft of the brake motor. The drive motor is used to drive the axially moving member to move toward or away from the clutch.

[0005] The electromechanical braking device provided in this application embodiment first drives the brake motor to clamp the brake disc of the vehicle during the parking braking process, and then drives the axial moving part to move relative to the clutch so that the clutch locks the motor shaft of the brake motor, thereby realizing the parking braking of the vehicle.

[0006] The electromechanical braking device provided in this application locks the motor shaft of the brake motor by the self-locking force output by the mechanical structure of the clutch itself. The brake motor and the drive motor can be switched to a power-off state or a power-down state. The brake motor and the drive motor do not need to run for a long time, thereby reducing the possibility of abnormal conditions in the electromechanical braking device, thereby improving the reliability of the electromechanical braking device and thus improving the safety of the vehicle.

[0007] In addition, the electromechanical braking device provided in this application controls the clutch to lock or release the other end of the motor shaft of the brake motor by moving the axial moving member relative to the clutch along the axial direction of the brake motor. This not only reduces the number of parts in the electromechanical braking device, thereby improving its reliability, but also shortens the mechanical transmission distance, thereby reducing the overall size of the electromechanical braking device. This helps save the space required for installing the electromechanical braking device in the vehicle and is conducive to the promotion of the electromechanical braking device.

[0008] In one embodiment, the clutch in the electromechanical braking device provided in this application includes an inner wheel, an outer wheel, and a movable component. The outer wheel and the inner wheel are sequentially spaced around the other end of the brake motor shaft. The inner wheel is used to fixally connect to the other end of the brake motor shaft. The inner circumferential surface of the outer wheel includes a groove, the opening of which faces the outer circumferential surface of the inner wheel. The depth of the groove gradually decreases along the circumferential direction of the brake motor. The movable component is used to move within the groove along the circumferential direction of the brake motor.

[0009] In the electromechanical braking device provided in this application embodiment, the movable component of the clutch moves along the circumference of the brake motor between a shallower groove region and a deeper groove region within a groove, thereby locking or releasing the other end of the brake motor shaft. Specifically, when the movable component moves to the shallower groove region, the bottom of the groove and the outer circumferential surface of the inner wheel simultaneously abut against the movable component radially along the brake motor, preventing the inner wheel from rotating relative to the outer wheel, thus locking the other end of the brake motor shaft. When the movable component moves to the deeper groove region, it can move relative to the bottom of the groove and the outer circumferential surface of the inner wheel, allowing the inner wheel to rotate relative to the outer wheel, thus releasing the other end of the brake motor shaft.

[0010] Accordingly, the electromechanical braking device provided in this application restricts or allows the relative rotation of the outer wheel and the inner wheel by moving the movable part in the clutch along the circumferential direction of the brake motor. This not only reduces the number of parts in the electromechanical braking device, thereby improving its reliability, but also reduces the radial dimension of the electromechanical braking device along the brake motor.

[0011] In one embodiment, the electromechanical braking device provided in this application includes a clutch comprising three movable parts, and an outer wheel comprising three grooves, each groove accommodating one movable part. The three grooves are equally spaced along the circumference of the brake motor. The minimum groove depth end of one of two adjacent grooves is located close to the maximum groove depth end of the other groove along the circumference of the brake motor.

[0012] In the electromechanical braking device provided in this application embodiment, the inner and outer wheels of the clutch are interconnected through three moving parts. This balances the forces on the inner wheel and reduces the external force borne by each individual moving part, thereby increasing their service life. Furthermore, the minimum groove depth of one groove is close to the maximum groove depth of another, ensuring that the three moving parts move in the same direction along the circumference of the brake motor, thus guaranteeing that the clutch can lock or release the other end of the brake motor shaft.

[0013] In one embodiment, the minimum groove depth of each groove in the outer wheel of the clutch in the electromechanical braking device provided in this application is greater than the length of the movable member along the radial direction of the brake motor, and the maximum groove depth of each groove is greater than the length of the movable member along the radial direction of the brake motor.

[0014] The curved bottom of the groove in the clutch of the electromechanical braking device provided in this application helps to reduce the length of the groove, thereby reducing the area where the outer wheel needs to be grooved and improving the structural strength of the outer wheel. Furthermore, the curved bottom of the groove allows the moving part to move smoothly within the groove. Additionally, the radial length of the moving part in the brake motor is less than the maximum groove depth but greater than the minimum groove depth. This allows the moving part to be restricted when moving to areas with smaller groove depths, while allowing relative rotation between the outer and inner wheels when moving to areas with larger groove depths, thereby enabling the clutch to lock or release the motor shaft of the brake motor.

[0015] In one embodiment, the clutch of the electromechanical braking device provided in this application includes a mating opening on the end face of the outer wheel facing the drive motor. The mating opening is connected to the groove along the axial direction of the outer wheel, and the axially moving member passes through the mating opening to drive the movable member.

[0016] The electromechanical braking device provided in this application provides a clutch with a mating opening on the end face of the outer wheel facing the drive motor. This allows the axial moving part to move circumferentially along the axial direction of the brake motor during the axial movement of the brake motor, thereby limiting or allowing the relative rotation of the outer wheel and the inner wheel, and thus enabling the clutch to lock or release the motor shaft of the brake motor.

[0017] In one embodiment, the clutch of the electromechanical braking device provided in this application includes an elastic element. The elastic element cooperates with an axially moving element to drive a movable element to reciprocate along the circumferential direction of the clutch. Specifically, when the axially moving element moves toward the clutch and causes the movable element to move clockwise along the circumferential direction of the clutch, and when the axially moving element moves away from the clutch, the elastic element drives the movable element to move counterclockwise along the circumferential direction of the clutch. Alternatively, when the axially moving element moves toward the clutch and causes the movable element to move counterclockwise along the circumferential direction of the clutch, and when the axially moving element moves away from the clutch, the elastic element drives the movable element to move clockwise along the circumferential direction of the clutch.

[0018] The electromechanical braking device provided in this application embodiment allows the clutch to revert to its original position via an elastic element when the axial moving member moves away from the clutch. This causes the moving member to reciprocate along the axial direction of the brake motor, thereby restricting or allowing the relative rotation of the outer and inner wheels. Specifically, when the axial moving member moves away from the clutch, the elastic element drives the moving member to move towards the minimum groove depth end of the groove, restricting the relative rotation of the outer and inner wheels. Correspondingly, the clutch locks the motor shaft of the brake motor. When the axial moving member moves towards the clutch, it can drive the moving member to overcome the elastic force output by the elastic element and move to a region with a larger groove depth. Consequently, the moving member no longer simultaneously abuts against the bottom of the groove and the outer circumferential surface of the inner wheel, allowing the inner and outer wheels to rotate relative to each other, thus releasing the motor shaft of the brake motor from the clutch. Alternatively, when the axial moving member moves towards the clutch, it drives the moving member to overcome the elastic force output by the elastic element and move to a region with a smaller groove depth, restricting the relative rotation of the outer and inner wheels. Correspondingly, the clutch locks the motor shaft of the brake motor. When the axial moving part moves away from the clutch, the elastic element drives the movable part to move to a region with a larger groove depth. Correspondingly, the movable part no longer simultaneously abuts against the bottom of the groove and the outer circumference of the inner wheel, allowing the inner wheel and the outer wheel to rotate relative to each other, thereby causing the clutch to release the motor shaft of the brake motor.

[0019] The electromechanical braking device provided in this application embodiment uses an axially moving member and an elastic member to cooperate with each other, allowing the moving member to reciprocate within a groove along the circumference of the brake motor. This restricts or allows the relative rotation of the inner and outer wheels of the clutch, thereby enabling the clutch to release or lock the motor shaft of the brake motor. Accordingly, the electromechanical braking device provided in this application embodiment not only reduces the number of parts required for parking brakes but also reduces the operating time of the brake motor and drive motor, thereby improving the reliability of the electromechanical braking device.

[0020] In one embodiment, the axial moving component of the electromechanical braking device provided in this application includes a transmission part and a pushing part. The transmission part is used to drive the motor shaft of the drive motor and move axially along the drive motor as the motor shaft rotates. The pushing part receives the driving force from the pushing part and moves axially along the drive motor to drive the movable component.

[0021] The axial moving component of the electromechanical braking device provided in this application embodiment can convert the rotational motion of the drive motor shaft into axial motion along the drive motor axis, thereby driving the moving component to move circumferentially along the clutch. This reduces the number of parts required for the electromechanical braking device to achieve parking brake, and simplifies the mechanical transmission path, contributing to the miniaturization of the electromechanical braking device. Furthermore, the axial moving component of the electromechanical braking device provided in this application embodiment can convert rotational motion into axial motion, thereby enabling the axial arrangement of the brake motor, clutch, and drive motor. This avoids the need for parallel arrangement of parking brake-related devices with the electromechanical braking device, and eliminates the need for foolproof design, allowing for flexible placement on the left and right sides of the vehicle. Additionally, the axial arrangement of the brake motor, clutch, and drive motor in the electromechanical braking device provided in this application embodiment reduces the radial dimension of the electromechanical braking device along the brake motor, which is beneficial for the widespread adoption of electromechanical braking devices.

[0022] In one embodiment, the pushing part of the axial moving member of the electromechanical braking device provided in this application includes a mating inclined surface at one end facing the outer wheel, and the inclination direction of the mating inclined surface intersects with the axial direction of the drive motor.

[0023] The axial moving part of the electromechanical braking device provided in this application embodiment contacts the outer peripheral surface of the movable part through a mating inclined surface. By controlling the distance the pushing part moves axially along the brake motor, the distance the movable part moves circumferentially along the brake motor can be controlled. Furthermore, the contact between the pushing part and the outer peripheral surface of the movable part through the mating inclined surface avoids impact on the movable part and allows for smoother movement of the movable part along the circumferential direction of the brake motor, thereby reducing the impact of the movable part on the inner and / or outer wheels.

[0024] In one embodiment, the outer wheel includes a clutch positioning part, and the brake motor includes a clutch positioning groove. The clutch positioning part is a protruding structure of the outer wheel facing the brake motor along the axial direction of the brake motor, and the clutch positioning groove is a recessed structure of the brake motor facing away from the outer wheel along the axial direction of the brake motor. The clutch positioning part and the clutch positioning groove cooperate to fix the relative position of the outer wheel and the brake motor. Alternatively, the outer wheel includes a clutch positioning groove, and the brake motor includes a clutch positioning part. The clutch positioning groove is a recessed structure of the outer wheel facing away from the brake motor along the axial direction of the brake motor, and the clutch positioning part is a protruding structure of the brake motor facing the outer wheel along the axial direction of the brake motor. The clutch positioning part and the clutch positioning groove cooperate to fix the relative position of the outer wheel and the brake motor.

[0025] The outer wheel of the clutch in the electromechanical braking device provided in this application embodiment is fixed to the housing of the brake motor, which ensures that the clutch and the brake motor are coaxially arranged, thereby allowing the clutch to lock or release the other end of the brake motor shaft. Furthermore, it improves the utilization rate of the brake motor housing; using the brake motor housing as the positioning reference for the clutch reduces the difficulty of coaxially arranging the clutch and brake motor.

[0026] In one embodiment, the locking device includes a housing component for fixedly connecting a brake motor and for accommodating a clutch, an axially moving component, and a drive motor. The housing component includes a connection opening. The connection opening connects the interior and exterior of the housing component, faces the brake motor, and the inner wheel is fixedly connected to the other end of the brake motor shaft through the connection opening. The end of the outer wheel facing the brake motor abuts against the housing of the brake motor through the connection opening.

[0027] The electromechanical braking device provided in this application provides a housing component for the locking device that can press the outer wheel onto the housing of the brake motor along the axial direction of the brake motor, thereby fixing the outer wheel to the housing of the brake motor. Furthermore, since the outer wheel utilizes the housing of the brake motor as a positioning base, the precision requirements of the housing component can be reduced; the housing component only needs to perform a clamping function.

[0028] In one embodiment, the locking device includes an annular fixing member disposed inside the housing and arranged between the clutch and the drive motor. The annular fixing member is fixedly connected to the outer wheel via a positioning member, which includes a positioning ring and a positioning groove. Specifically, the end face of the annular fixing member facing the outer wheel includes the positioning ring, and the end face of the outer wheel facing the annular fixing member includes the positioning groove; or, the end face of the annular fixing member facing the outer wheel includes the positioning groove, and the end face of the outer wheel facing the annular fixing member includes the positioning ring.

[0029] In the electromechanical braking device provided in this application embodiment, the locking device is achieved by the cooperation of an annular fixing member, a housing member, and a positioning member. The housing member can press the drive motor and the outer wheel onto the housing of the brake motor. The housing of the brake motor can be used as a positioning reference to ensure that the drive motor, clutch, and brake motor are coaxially arranged.

[0030] In one embodiment, the axial moving member is connected to the motor shaft of the drive motor via a transmission member. The transmission member is used to rotate with the motor shaft of the drive motor and drive the axial moving member to move axially along the brake motor.

[0031] In one embodiment, the transmission component includes a transmission screw and a threaded hole. The threaded hole passes through the transmission part of the axially moving component along the axial direction of the brake motor. The transmission screw is sleeved on the motor shaft of the drive motor and fixedly connected to the motor shaft. The axially moving component is sleeved on the transmission screw through the threaded hole, and the external thread of the transmission screw meshes with the internal thread of the threaded hole. The electromechanical braking device provided in this application, through the transmission screw and threaded hole, can shorten the force transmission chain between the drive motor and the axially moving component, thereby simplifying the structure of the electromechanical braking device and helping to improve its reliability.

[0032] In one embodiment, along the axial direction of the brake motor, an axially moving component is arranged between the clutch and the drive motor, with the axes of the brake motor, the axially moving component, the clutch, and the drive motor coinciding. The electromechanical braking device provided in this application, with its components arranged coaxially adjacent to each other, ensures a consistent appearance and structure. Compared to existing electromechanical braking devices, it avoids the need for symmetrical components on the left or right side of the vehicle. This not only reduces the number of parts in the electromechanical braking device and eliminates the need for assembly error-proofing design, but also reduces the dimension of the axially moving component along the axial direction of the brake motor.

[0033] A second aspect of this application provides a vehicle including wheels and an electromechanical braking device as described in any of the first aspects, the electromechanical braking device being used to brake the wheels. The vehicle provided in this application can perform parking braking by locking the motor shaft of the brake motor using the electromechanical braking device, so that the brake motor does not need to be in a working state for a long time, thereby improving vehicle safety. Attached Figure Description

[0034] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of this application;

[0035] Figure 2 A schematic diagram of an electromechanical braking device provided in an embodiment of this application;

[0036] Figure 3 Another schematic diagram of an electromechanical braking device provided in an embodiment of this application;

[0037] Figure 4 A schematic diagram of a clutch in an electromechanical braking device provided in this application embodiment;

[0038] Figure 5 for Figure 3 The diagram shows a cross-sectional view of the electromechanical braking device along point AA.

[0039] Figure 6 for Figure 5A partial enlarged view of point B in the electromechanical braking device shown;

[0040] Figure 7 A left view of a locking device provided in an embodiment of this application;

[0041] Figure 8 for Figure 7 Sectional view at point BB;

[0042] Figure 9 A front view of the clutch engaging with an axially moving component, provided in an embodiment of this application;

[0043] Figure 10 for Figure 9 Sectional view at CC;

[0044] Figure 11 A three-dimensional structural schematic diagram of a clutch provided for an embodiment of this application;

[0045] Figure 12 This is a first three-dimensional structural diagram of a ring-shaped fastener provided in an embodiment of this application;

[0046] Figure 13 This is a schematic diagram of a second three-dimensional structure of a ring-shaped fastener provided in an embodiment of this application;

[0047] Figure 14 This is a three-dimensional structural diagram of an axially moving component provided in an embodiment of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 100. Electromechanical braking device;

[0050] 10. Brake motor; 11. Clutch positioning groove;

[0051] 20. Locking device;

[0052] 30. Clutch;

[0053] 31. Inner wheel;

[0054] 32. Outer wheel; 321. Groove; 322. Mating opening; 323. Clutch positioning part;

[0055] 33. Movable parts;

[0056] 34. Elastic components;

[0057] 40. Axial moving parts;

[0058] 41. Transmission section; 411. Large ring section; 412. Small ring section;

[0059] 42. Propulsion section; 421. Fitting inclined plane;

[0060] 50. Drive motor; 51. Motor positioning part;

[0061] 60. Housing component; 61. Connection opening; 62. Fixing part; 63. Housing part; 64. Step;

[0062] 70. Positioning component; 71. Positioning ring; 72. Positioning groove;

[0063] 80. Annular fastener; 81. Fixed main body; 82. Fixed connection part; 83. Motor positioning groove;

[0064] 90. Transmission component; 91. Transmission screw; 92. Threaded hole;

[0065] 110. Brake;

[0066] 200. Reducer;

[0067] 300. Wheel;

[0068] 400. Brake disc;

[0069] 500. Vehicles. Detailed Implementation

[0070] Electromechanical braking systems typically consist of a brake and a brake motor. The brake is driven by the motor shaft of the brake motor. The brake motor is used to drive the brake to clamp or release the brake disc. During service braking, the brake motor of the electromechanical braking system drives the brake to clamp the brake disc, thereby braking the vehicle. During parking braking, the brake motor of the electromechanical braking system needs to be constantly activated to drive the brake to clamp the vehicle. In other words, the brake motor is always powered on.

[0071] However, brake motors are prone to overheating and damage after prolonged periods of operation. If a vehicle is parked on a slope and in a parked position, a damaged brake motor will be unable to drive the brakes to clamp the brake discs, causing the vehicle to roll away and compromising parking safety.

[0072] In view of this, embodiments of this application provide an electromechanical braking device 100 and a vehicle 500 using the same, which can reduce the possibility of abnormal situations occurring in the electromechanical braking device 100 and improve the safety of the vehicle 500.

[0073] Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application. Figure 1As shown, the vehicle 500 provided in this application embodiment may include an electromechanical braking device 100, wheels 300, and brake discs 400. The electromechanical braking device 100 is fixedly connected to the vehicle body of the vehicle 500, and the electromechanical braking device 100 brakes the wheels 300 through the brake discs 400, thereby realizing the driving brake or parking brake of the vehicle 500.

[0074] In this embodiment of the application, vehicle 500 includes two-wheeled vehicles, three-wheeled vehicles, electric vehicles (EVs), or may be pure electric vehicles (PEVs / BEVs), hybrid electric vehicles (HEVs), range-extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), or new energy vehicles (NEVs).

[0075] In this embodiment, the wheel 300 includes at least one of the front or rear wheels of the vehicle 500. The front wheels include the left front wheel and the right front wheel, and the rear wheels include the right rear wheel and the left rear wheel. In one embodiment, an electromechanical braking device 100 can be used to brake either the front or rear wheels of the vehicle 500. Accordingly, the vehicle 500 includes one or two electromechanical braking devices 100. In one embodiment, an electromechanical braking device 100 can be used to brake one of the left front wheel, right front wheel, right rear wheel, and left rear wheel of the vehicle 500. Accordingly, the vehicle 500 may include two or four electromechanical braking devices 100.

[0076] The vehicle 500 provided in this application embodiment can use the electromechanical braking device 100 to lock the motor shaft of the brake motor to perform parking braking on the vehicle 500, so that the brake motor 10 does not need to be in working state for a long time, which can reduce the possibility of abnormal situation of the electromechanical braking device 100 and improve the safety of the vehicle 500.

[0077] The electromechanical braking device 100 provided in the embodiments of this application will now be described in conjunction with the accompanying drawings.

[0078] Figure 2 This is a schematic diagram of an electromechanical braking device provided in an embodiment of this application. In this embodiment, the electromechanical braking device 100 includes a brake motor 10 and a locking device 20. Figure 2As shown, one end of the motor shaft of the brake motor 10 is used to drive the brake 110. The brake 110 is used to brake the vehicle 500. The locking device 20 is used to lock the brake motor 10 through the other end of the motor shaft of the brake motor 10.

[0079] In one embodiment, the electromechanical braking device 100 provided in this application further includes a speed reducer 200. For example... Figure 2 As shown, the brake motor 10 drives the brake 110 through the reducer 200 to clamp the brake disc 400, thus braking the vehicle 500, or releases the brake disc 400 to release the braking of the vehicle 500.

[0080] In one embodiment, the electromechanical braking device 100 includes a brake motor 10, a locking device 20, and a brake 110. In another embodiment, the brake 110 includes a reducer 200. The brake 110 is connected to the brake motor 10 of the electromechanical braking device 100 via the reducer 200.

[0081] The operating direction of the brake motor 10 in the electromechanical braking device 100 provided in this application embodiment is either counterclockwise or clockwise. In one embodiment, when the electromechanical braking device 100 activates the parking brake or the service brake, the brake motor 10 runs clockwise; when the electromechanical braking device 100 deactivates the parking brake or the service brake, the brake motor 10 runs counterclockwise. In another embodiment, when the electromechanical braking device 100 activates the parking brake or the service brake, the brake motor 10 runs counterclockwise; when the electromechanical braking device 100 deactivates the parking brake or the service brake, the brake motor 10 runs clockwise.

[0082] For example, when the electromechanical braking device 100 applies the service brake to the vehicle 500, the brake motor 10 operates and drives the brake 110 to clamp the brake disc 400, so that the wheel 300 cannot rotate, thereby achieving the service brake.

[0083] For example, when the electromechanical braking device 100 applies the parking brake to the vehicle 500, the brake motor 10 operates and drives the brake 110 to clamp the brake disc 400, preventing the wheel 300 from rotating. Then, the locking device 20 locks the other end of the motor shaft of the brake motor 10. After the brake motor 10 is locked by the locking device 20, the brake 110 can always clamp the brake disc 400 of the vehicle 500, thereby achieving parking brake operation. Correspondingly, during the parking brake application process of the electromechanical braking device 100 to the vehicle 500, the brake motor 10 can be de-energized, thus avoiding prolonged operation.

[0084] For example, when the electromechanical braking device 100 releases the parking brake, the locking device 20 releases the other end of the motor shaft of the brake motor 10, thereby releasing the parking brake state of the vehicle 500. After the locking device 20 releases the brake motor 10, the brake motor 10 can run or run in the opposite direction. Specifically, after the locking device 20 releases the brake motor 10, the brake motor 10 runs and drives the brake 110 to clamp the brake disc 400 of the vehicle 500, preventing the wheels 300 from rotating and thus maintaining the vehicle's service brake state. Alternatively, after the locking device 20 releases the brake motor 10, the brake motor 10 runs in the opposite direction and drives the brake 110 to release the brake disc 400 of the vehicle 500, allowing the wheels of the vehicle 500 to move and thus releasing the vehicle's service brake state.

[0085] Figure 3 This is another schematic diagram of an electromechanical braking device provided in an embodiment of this application. Figure 4 for Figure 3 The electromechanical braking device shown is a cross-sectional view along point AA. (Combined with...) Figure 2 , Figure 3 and Figure 4 As shown, in the electromechanical braking device 100, the brake motor 10 and the locking device 20 are arranged adjacent to each other along the axial direction of the brake motor 10. In one embodiment, the axes of the brake motor 10 and the locking device 20 overlap in the electromechanical braking device 100.

[0086] In this embodiment, the locking device 20 includes a clutch 30, an axial moving member 40, and a drive motor 50. The clutch 30 is sleeved on the other end of the motor shaft 10A of the brake motor 10. The axial moving member 40 is used to move relative to the clutch 30 along the axial direction of the brake motor 10 and to control the clutch 30 to lock or release the other end of the motor shaft 10A of the brake motor 10. The drive motor 50 is used to drive the axial moving member 40 to move away from or towards the clutch 30.

[0087] In one embodiment, the clutch 30 in the electromechanical braking device 100 is an overrunning clutch.

[0088] In this embodiment, the locking device 20 locks the other end of the motor shaft of the brake motor 10, which is equivalent to the clutch 30 locking the other end of the motor shaft of the brake motor 10. This can be understood as the clutch 30 hindering or preventing the rotation of the motor shaft of the brake motor 10. In this embodiment, the locking device 20 releases the other end of the motor shaft of the brake motor 10, which is equivalent to the clutch 30 releasing the other end of the motor shaft of the brake motor 10. This can be understood as the clutch 30 not hindering or preventing the rotation of the motor shaft of the brake motor 10.

[0089] like Figure 4As shown, in the electromechanical braking device 100 provided in this application embodiment, the brake motor 10, clutch 30, and drive motor 50 are arranged sequentially along the axial direction of the brake motor 10. In one embodiment, the axis of the brake motor 10, the axis of the clutch 30, and the axis of the drive motor 50 coincide. Specifically, the brake motor 10, clutch 30, and drive motor 50 in the electromechanical braking device 100 are coaxially arranged.

[0090] Accordingly, the electromechanical braking device 100 provided in this application embodiment arranges the parking brake function-related devices and the brake motor 10 coaxially. Compared with the prior art that arranges the parking brake module and the brake motor 10 in parallel, this avoids the problem of symmetrical components when the electromechanical braking device 100 is placed on the left or right side of the vehicle 500, and does not require a foolproof design, allowing for flexible placement on both sides of the vehicle 500. In addition, the brake motor 10, clutch 30, and drive motor 50 in the electromechanical braking device 100 provided in this application embodiment are arranged coaxially and adjacently, which can reduce the radial dimension of the electromechanical braking device 100 along the brake motor 10, thus facilitating the miniaturization of the electromechanical braking device 100.

[0091] In this embodiment, the movement of the axial moving member 40 relative to the clutch 30 along the axial direction of the brake motor 10 may include the axial moving member 40 moving towards the clutch 30 along the axial direction of the brake motor 10, and the axial moving member 40 moving away from the clutch 30 along the axial direction of the brake motor 10. In one embodiment, the movement of the axial moving member 40 towards the clutch 30 along the axial direction of the brake motor 10 controls the clutch 30 to release the other end of the motor shaft of the brake motor 10, and the movement of the axial moving member 40 away from the clutch 30 along the axial direction of the brake motor 10 controls the clutch 30 to lock the other end of the motor shaft of the brake motor 10. In another embodiment, the movement of the axial moving member 40 towards the clutch 30 along the axial direction of the brake motor 10 controls the clutch 30 to lock the other end of the motor shaft of the brake motor 10, and the movement of the axial moving member 40 away from the clutch 30 along the axial direction of the brake motor 10 controls the clutch 30 to release the other end of the motor shaft of the brake motor 10.

[0092] The electromechanical braking device 100 provided in this application embodiment has two operating directions: counterclockwise and clockwise. In one embodiment, when the electromechanical braking device 100 activates the parking brake, the drive motor 50 runs clockwise; when the electromechanical braking device 100 deactivates the parking brake, the drive motor 50 runs counterclockwise. In another embodiment, when the electromechanical braking device 100 activates the parking brake, the drive motor 50 runs counterclockwise; when the electromechanical braking device 100 deactivates the parking brake, the drive motor 50 runs clockwise.

[0093] Figure 5 for Figure 4A magnified view of point B in the electromechanical braking device shown. Figure 5 As shown, along the axial direction of brake motor 10 (e.g.) Figure 4 In the X direction, the axial moving member 40 moves away from the clutch 30 until it separates from the clutch 30. The axial moving member 40 is located between the clutch 30 and the drive motor 50. The axial moving member 40 moves towards the clutch 30, with a portion of the axial moving member 40 located inside the clutch 30 and another portion located between the clutch 30 and the drive motor 50. Accordingly, in the electromechanical braking device 100 provided in this application embodiment, the axial moving member 40 is disposed between the clutch 30 and the drive motor 50. This not only reduces the travel distance required for the axial moving member 40 to move along the axial direction of the brake motor 10 and control the clutch 30 to lock or release the brake motor 10, but also reduces the size of the axial moving member 40 along the axial direction of the brake motor 10. This improves the response speed of the electromechanical braking device 100 and reduces its size along the axial direction of the brake motor 10.

[0094] For example, when the electromechanical braking device 100 applies the service brake to the vehicle 500, the brake motor 10 operates and drives the brake 110 to clamp the brake disc 400, so that the wheel 300 cannot rotate, thereby achieving the service brake.

[0095] For example, when the electromechanical braking device 100 applies the parking brake to the vehicle 500, the brake motor 10 operates and drives the brake 110 to clamp the brake disc 400, preventing the wheel 300 from rotating. Then, the drive motor 50 operates and drives the axial moving member 40 to move relative to the clutch 30 along the axial direction of the brake motor 10. The axial moving member 40, moving along the axial direction of the brake motor 10, controls the clutch 30 to lock the other end of the motor shaft of the brake motor 10. After the brake motor 10 is locked by the clutch 30, the brake 110 can always clamp the brake disc 400 of the vehicle 500, thereby achieving parking braking. Accordingly, both the drive motor 50 and the brake motor 10 can be de-energized, eliminating the need for them to be in an operational state for extended periods.

[0096] For example, when the electromechanical braking device 100 releases the parking brake, the drive motor 50 runs in the opposite direction and drives the axial moving member 40 to move relative to the clutch 30 along the axial direction of the brake motor 10. The axial moving member 40, moving along the axial direction of the brake motor 10, controls the clutch 30 to release the other end of the motor shaft of the brake motor 10, thereby releasing the parking brake state of the vehicle 500. After the clutch 30 releases the brake motor 10, the brake motor 10 can run or run in the opposite direction. Specifically, after the clutch 30 releases the brake motor 10, the brake motor 10 runs and drives the brake 110 to clamp the brake disc 400 of the vehicle 500, so that the wheels 300 cannot rotate, thereby maintaining the vehicle's service brake state. Alternatively, after the clutch 30 releases the brake motor 10, the brake motor 10 runs in the opposite direction and drives the brake 110 to release the brake disc 400 of the vehicle 500, so that the wheels of the vehicle 500 can move, thereby releasing the vehicle 500's service brake state.

[0097] When the electromechanical braking device 100 provided in this embodiment applies the parking brake, after the brake 110 clamps the brake disc 400, a mechanical structure involving the axial moving member 40 and the clutch 30 locks the motor shaft of the brake motor 10, preventing the motor shaft of the brake motor 10 from rotating and ensuring that the brake 110 always clamps the brake disc 400. Therefore, the electromechanical braking device 100 provided in this embodiment does not require the brake motor 10 and drive motor 50 to be in a working state for an extended period when applying the parking brake. In other words, the electromechanical braking device 100 provided in this embodiment does not require the brake motor 10 and drive motor 50 to remain powered on for an extended period when applying the parking brake, which reduces the possibility of abnormal conditions in the brake motor 10 and drive motor 50, thereby improving the reliability of the electromechanical braking device 100 and ultimately enhancing the safety of the vehicle 500.

[0098] In addition, the electromechanical braking device 100 provided in this application embodiment controls the clutch 30 to lock or release the motor shaft of the brake motor 10 by moving the axial moving member 40 along the axial direction of the brake motor 10 relative to the clutch 30. This can shorten the mechanical transmission distance between the drive motor 50 and the clutch 30, which can not only reduce the number of parts of the electromechanical braking device 100 and thus improve the reliability of the electromechanical braking device 100, but also reduce the radial dimension of the electromechanical braking device 100 along the brake motor 10, thus facilitating the miniaturization of the electromechanical braking device 100.

[0099] In one embodiment, the locking device 20 includes a clutch 30, an axially moving member 40, a drive motor 50, and a housing member 60. The housing member 60 is used to securely connect the housing of the brake motor 10 and to house the clutch 30, the axially moving member 40, and the drive motor 50. Figure 4As shown, along the axial direction of the brake motor 10, the clutch 30, the axial moving part 40, and the drive motor 50 are arranged sequentially inside the housing part 60.

[0100] In this embodiment, the housing 60 is fixedly connected to the housing of the brake motor 10, and the clutch 30, the axial moving member 40, and the drive motor 50 are fixed inside the housing 60. The axis of the clutch 30 coincides with the axis of the brake motor 10, and the axis of the clutch 30, the axis of the axial moving member 40, and the axis of the drive motor 50 also coincide. The housing 60 serves two purposes: firstly, it fixes the relative positions of the clutch 30, the axial moving member 40, and the drive motor 50 so that their axes coincide; secondly, it fixes the relative positions of the locking device 20 and the brake motor 10 so that the axes of the clutch 30 and the brake motor 10 coincide.

[0101] The electromechanical braking device 100 provided in this application embodiment arranges the parking brake function-related devices and the brake motor 10 coaxially. This not only eliminates the need for foolproof design on the left and right sides of the vehicle 500, but also reduces the radial dimension of the electromechanical braking device 100 along the brake motor 10, thereby achieving miniaturization.

[0102] In one embodiment, the locking device 20 includes a clutch 30, an axially moving member 40, a drive motor 50, and an annular fixing member 80. For example... Figure 4 and Figure 6 As shown, the annular fixing member 80 is disposed inside the housing member 60. The annular fixing member 80 is arranged between the clutch 30 and the drive motor 50, and the annular fixing member 80 and the axial moving member 40 are arranged in sequence around the motor shaft of the drive motor 50. The end face of the annular fixing member 80 facing the clutch 30 abuts against the end face of the outer wheel 32 facing the drive motor 50, and the end face of the annular fixing member 80 facing the drive motor 50 abuts against the drive motor 50.

[0103] Figure 6 This is another schematic diagram of the locking device in the electromechanical braking device provided in the embodiments of this application. In the embodiments of this application, the clutch 30 includes an inner wheel 31, an outer wheel 32, and a movable member 33.

[0104] In this embodiment, the outer wheel 32 and the inner wheel 31 are sequentially spaced around the other end of the motor shaft of the brake motor 10. (Combined with...) Figure 5 and Figure 6As shown, the inner wheel 31 of the clutch 30 is sleeved on the other end of the motor shaft 10A of the brake motor 10, and the outer wheel 32 is sleeved on the outer circumferential surface of the inner wheel 31 and movably connected to the inner wheel 31. In one embodiment, the inner wheel 31 includes an outer circumferential surface and an inner circumferential surface, and the outer wheel 32 includes an outer circumferential surface and an inner circumferential surface. The inner circumferential surface of the inner wheel 31 contacts the outer circumferential surface of the motor shaft of the brake motor 10, and the inner circumferential surface of the outer wheel 32 is sleeved on the outer circumferential surface of the inner wheel 31.

[0105] In this embodiment, the inner wheel 31 is fixedly connected to the other end of the motor shaft of the brake motor 10, so that the inner wheel 31 rotates with the motor shaft of the brake motor 10 or remains stationary. Regardless of whether the clutch 30 locks the other end of the motor shaft of the brake motor 10, the outer wheel 32 not only remains stationary relative to the inner wheel 31, but also does not move axially along the brake motor 10 or rotate circumferentially along the brake motor 10. It can be understood that if the inner wheel 31 can move relative to the outer wheel 32, then the clutch 30 releases the motor shaft of the brake motor 10. If the inner wheel 31 cannot move relative to the outer wheel 32, then the clutch 30 locks the motor shaft of the brake motor 10.

[0106] In one embodiment, the housing member 60 includes a connecting opening 61, a fixing portion 62, and a housing portion 63. For example... Figure 6 As shown, the connecting opening 61 faces the brake motor 10, and the fixing part 62 surrounds the connecting opening 61. Along the axial direction of the brake motor 10, the end face of the fixing part 62 facing the brake motor 10 is flush with the opening of the connecting opening 61.

[0107] In this embodiment, the connecting opening 61 is used to connect the interior and exterior of the housing member 60. For example... Figure 6 As shown, the inner wheel 31 of the clutch 30 is fixedly connected to the other end of the motor shaft of the brake motor 10 through the connecting opening 61. The outer wheel 32, facing the axial direction of the brake motor 10, abuts against the housing of the brake motor 10 through the connecting opening 61.

[0108] In this embodiment, the housing 60 is fixedly connected to the housing of the brake motor 10 via a fixing part 62. The fixing part 62 and the housing of the brake motor 10 are fixedly connected by welding, threaded connection, or snap-fit.

[0109] Figure 7 This is a schematic diagram of a locking device in an electromechanical braking device provided in an embodiment of this application. For example... Figure 7 As shown, the fixing part 62 of the housing 60 includes a plurality of fixing holes spaced apart along the circumference of the brake motor 10. The fixing holes can be used for fixing bolts that are threadedly connected to the housing of the brake motor 10 to pass through.

[0110] In this embodiment, the housing portion 63 is used to accommodate the clutch 30, the axial moving member 40, and the drive motor 50. For example... Figure 6As shown, along the axial direction of the brake motor 10, the clutch 30, the axial moving member 40, and the drive motor 50 are sequentially arranged inside the housing portion 63. In one embodiment, the drive motor 50 includes a housing 50B, which houses the stator and rotor of the drive motor 50, and the housing portion 63 houses the housing of the drive motor 50. Figure 6 As shown, the housing 50B of the drive motor 50 is fixedly connected to the inner wall of the housing portion 63 and restricts the relative rotation between the drive motor 50 and the housing portion 60. In one embodiment, the housing portion 63 is the housing of the drive motor 50. The housing portion 63 is used to accommodate the clutch 30, the axial moving member 40, and the stator and rotor of the drive motor 50.

[0111] In one embodiment, the housing portion 63 includes a step 64. The step 64 is flush with the end face of the drive motor 50 facing the clutch 30 or the end face of the housing 50B of the drive motor 50 facing the clutch 30. Figure 6 As shown, step 64 is used to abut against the end face of the annular fastener 80 facing the drive motor 50. In one embodiment, step 64 and the end face of the drive motor 50 simultaneously abut against the end face of the annular fastener 80 facing the drive motor 50.

[0112] In this embodiment, the annular fixing member 80 and the outer wheel 32 of the clutch 30 are engaged and fixedly connected by a positioning member 70. In this embodiment, the positioning member 70 includes a positioning ring 71 and a positioning groove 72. Figure 6 As shown, the end face of the annular fixing member 80 facing the outer wheel 32 includes a positioning ring 71, and the end face of the outer wheel 32 facing the annular fixing member 80 includes a positioning groove 72. In this embodiment, the positions of the positioning ring 71 and the positioning groove 321 can also be interchanged. In one embodiment, the end face of the outer wheel 32 facing the annular fixing member 80 includes a positioning ring 71, and the end face of the annular fixing member 80 facing the outer wheel 32 includes a positioning groove 321.

[0113] like Figure 6 As shown, the positioning ring 71 and the fixing member 80 are an integral structure, which helps to improve the connection strength between the positioning ring 71 and the fixing member 80 and can improve the manufacturing efficiency of both. In one embodiment, the positioning ring 71 and the fixing member 80 can be a separate structure, with the positioning ring 71 fixedly connected to the fixing member 80.

[0114] In this embodiment, the locking device 20, through the positioning member 70, can not only ensure that the drive motor 50 and the clutch 30 are coaxially arranged, but also use the positioning member 70 to restrict the outer wheel 32 from rotating relative to the housing member 60.

[0115] Figure 7 This is a schematic diagram of a locking device in an electromechanical braking device provided in an embodiment of this application. Figure 8 for Figure 7 A cross-sectional schematic diagram of the locking device of the electromechanical braking device shown at point BB.

[0116] Combination Figure 7 and Figure 8 As shown, the inner circumferential surface of the outer wheel 32 includes a groove 321. The opening of the groove 321 faces the outer circumferential surface of the inner wheel 31, and the groove depth of the groove 321 gradually decreases along the circumferential direction of the brake motor 10.

[0117] In this embodiment, the minimum groove depth of the groove 321 is greater than the radial length of the movable member 33 along the brake motor 10, and the maximum groove depth of the groove 321 is greater than the radial length of the movable member 33 along the brake motor 10. In this embodiment, the groove depth of the groove 321 is the distance between the bottom of the groove 321 and the opening of the groove 321 along the radial direction of the brake motor 10. The groove depth of the groove 321 gradually decreases along the circumference of the brake motor 10, which can be a linear decrease or a non-linear decrease.

[0118] In this embodiment, the bottom of the groove 321 can be curved, which helps to reduce the size of the groove 321 in the circumferential direction of the brake motor 10, thereby reducing the slotted area on the outer wheel 32 and improving the structural strength of the outer wheel 32.

[0119] In this embodiment, the movable member 33 is used to move within the groove 321 along the circumferential direction of the brake motor 10. For example... Figure 7 or Figure 8 As shown, the brake motor 10 is circumferentially oriented as in the M direction. In this embodiment, the moving part 33 includes ball bearings. Figure 7 As shown, the movable element 33 is a ball bearing, which moves within the groove 321 along the circumference of the clutch 30. In one embodiment, the movable element 33 includes a cylindrical rolling element whose axis is parallel to the axis of the clutch 30.

[0120] In this embodiment, the movable member 33, moving circumferentially along the brake motor 10 to different positions in the groove 321, can restrict or allow the relative rotation of the inner wheel 31 and the outer wheel 32 in the clutch 30, thereby locking or releasing the other end of the motor shaft of the brake motor 10. For example... Figure 7 or Figure 8As shown, when the movable member 33 moves to the area with a shallower groove depth in the groove 321, the bottom of the groove 321 and the outer peripheral surface of the inner wheel 31 simultaneously abut against the movable member 33 along the radial direction of the brake motor 10, thereby preventing the inner wheel 31 from rotating relative to the outer wheel 32, and thus causing the clutch 30 to lock the other end of the motor shaft of the brake motor 10. Correspondingly, when the movable member 33 moves to the area with a deeper groove depth in the groove 321, the movable member 33 can move relative to the bottom of the groove 321 and the outer peripheral surface of the inner wheel 31, thereby allowing the inner wheel 31 to rotate relative to the outer wheel 32, and thus causing the clutch 30 to release the other end of the motor shaft of the brake motor 10.

[0121] Accordingly, the electromechanical braking device 100 provided in this application embodiment restricts or allows the relative rotation of the outer wheel 32 and the inner wheel 31 by moving the movable part 33 in the clutch 30 along the circumferential direction of the brake motor 10. This not only reduces the number of parts in the electromechanical braking device 100, thereby improving the reliability of the electromechanical braking device 100, but also reduces the radial dimension of the electromechanical braking device 100 along the brake motor 10.

[0122] In this embodiment, the number of grooves 321 is the same as the number of movable parts 33, with each groove 321 accommodating one movable part 33. The number of movable parts 33 is at least one; for example, the number of movable parts 33 can be one, two, three, four, etc. It is understood that the more movable parts 33 there are, the lower the structural strength requirement for each individual movable part 33, which helps to reduce the cost of the movable parts 33. Furthermore, when there are multiple movable parts 33, they can be evenly spaced along the circumference of the brake motor 10, which helps to balance the forces on the inner wheel 31 and the outer wheel 32, thereby improving the service life of the clutch 30.

[0123] like Figure 8 As shown, the clutch 30 includes three moving parts 33, and the outer wheel 32 includes three grooves 321. Each groove 321 is used to accommodate one moving part 33. The three grooves 321 are evenly spaced along the circumference of the brake motor 10. In this embodiment, "evenly spaced" can be understood as the same distance between two adjacent grooves 321 in the circumferential direction of the brake motor 10. The minimum groove depth end A1 of one of the two adjacent grooves 321 is close to the maximum groove depth end A2 of the other groove 321 along the circumference of the brake motor 10. The minimum groove depth end A1 refers to the end of the groove 321 where the minimum groove depth is located, and the maximum groove depth end refers to the end of the groove 321 where the maximum groove depth is located. This arrangement can balance the forces on the inner wheel 31 and the outer wheel 32, and reduce the external force borne by a single moving part 33, thereby improving the service life of the clutch 30.

[0124] In this embodiment, the groove depth of each groove 321 gradually decreases along the circumference of the brake motor 10, and each groove 321 has a minimum groove depth end A1 and a maximum groove depth end A2. Furthermore, for two adjacent grooves 321, placing the minimum groove depth end of one groove 321 closer to the maximum groove depth end of the other groove 321 allows the corresponding movable member 33 of each groove 321 to move in the same direction along the circumference of the brake motor 10. This simplifies the structure of the axial moving member 40 and ensures that the clutch 30 locks or releases the other end of the motor shaft of the brake motor 10. Therefore, when there are two or more grooves 321, the minimum groove depth end A1 of one groove 321 is closer to the maximum groove depth end A2 of the other groove 321.

[0125] In this embodiment, the clutch 30 includes an elastic element 34, which cooperates with the axial moving element 40 to drive the movable element 33 to move back and forth along the circumference of the clutch 30.

[0126] In this embodiment, the elastic element 34 includes a helical spring. Figure 10 As shown, one end of the spring is used to connect with the end wall of the groove at the maximum groove depth A2 of the groove 321, and the other end of the spring is used to connect with the movable member 33. In some embodiments, the elastic member 34 includes a resilient sheet, one end of which is used to connect with the end wall of the groove at the maximum groove depth A2 of the groove 321, and the other end of which is used to connect with the movable member 33.

[0127] In this embodiment of the application, an elastic element 34 is provided in each groove 321 of the outer wheel 32 of the clutch 30. For example... Figure 8 As shown, there are three grooves 321. Correspondingly, there are three elastic elements 34, each elastic element 34 being disposed in one groove 321.

[0128] In this embodiment, the elastic member 34 ensures that the movable member 33 always tends to move circumferentially along the clutch 30. The axial moving member 40 and the elastic member 34 cooperate to allow the movable member 33 to reciprocate within the groove 321 circumferentially along the brake motor 10. In one embodiment, the axial moving member 40 moves toward the clutch 30, causing the movable member 33 to move clockwise along the circumference of the clutch 30 and press against the elastic member 34. When the axial moving member 40 moves away from the clutch 30, the elastic member 34 resets and drives the movable member 33 to move counterclockwise along the circumference of the clutch 30. In another embodiment, the axial moving member 40 moves toward the clutch 30, causing the movable member 33 to move counterclockwise along the circumference of the clutch 30 and press against the elastic member 34. When the axial moving member 40 moves away from the clutch 30, the elastic member 34 resets and drives the movable member 33 to move clockwise along the circumference of the clutch 30.

[0129] like Figure 8As shown, the elastic element 34 ensures that the movable element 33 always has the ability to move circumferentially along the clutch 30 from the maximum groove depth end A2 of the groove 321 towards the minimum groove depth end A1. Figure 7 or Figure 10 As shown, the axial moving member 40 moves toward the clutch 30 and drives the movable member 33 to move clockwise along the circumference of the clutch 30 to the area with a larger groove depth in the groove 321 and squeeze the elastic member 34. When the axial moving member 40 moves away from the clutch 30, the elastic member 34 resets and drives the movable member 33 to move counterclockwise along the circumference of the clutch 30 to the position with a smaller groove depth in the groove 321.

[0130] Specifically, the axially moving member 40 moves toward the clutch 30, and a portion of the axially moving member 40 enters the groove 321 through the mating opening 322 and contacts the movable member 33. The distance the axially moving member 40 moves toward the clutch 30 gradually increases. After the thrust of the axially moving member 40 on the movable member 33 exceeds the elastic force of the elastic member 34 on the movable member 33, the movable member 33 moves clockwise along the circumference of the clutch 30, thus moving from the minimum groove depth end to the maximum groove depth end of the groove 321 along the circumference of the clutch 30. Correspondingly, the movable member 33 does not simultaneously abut against the bottom of the groove 321 in both the inner wheel 31 and the outer wheel 32, allowing the inner wheel 31 to rotate relative to the outer wheel 32.

[0131] Specifically, the axial moving member 40 moves away from the clutch 30. As the distance the axial moving member 40 moves away from the clutch 30 increases, the thrust of the axial moving member 40 on the movable member 33 is less than the elastic force of the elastic member 34 on the movable member 33. The elastic member 34 resets and drives the movable member 33 to move counterclockwise along the circumference of the clutch 30. Thus, the movable member 33 moves from the maximum groove depth end to the minimum groove depth end of the groove 321 along the circumference of the clutch 30. At the same time, the movable member 33 abuts against the bottom of the groove 321 in the inner wheel 31 and the outer wheel 32 respectively, thereby restricting the relative rotation of the inner wheel 31 and the outer wheel 32 and locking the other end of the motor shaft of the brake motor 10.

[0132] Understandably, when the inner wheel 31 and the outer wheel 32 rotate relative to each other, and the movable part 33 simultaneously abuts against the bottom of the groove 321 in both the inner wheel 31 and the outer wheel 32, the movable part 33 will prevent the relative rotation of the inner wheel 31 and the outer wheel 32. Accordingly, the inner wheel 31, the outer wheel 32, and the movable part 33 in the clutch 30 form a self-locking mechanical structure, which locks the motor shaft of the brake motor 10.

[0133] In another embodiment, the elastic member 34 can also cause the movable member 33 to always move along the circumference of the clutch 30 from the minimum groove depth end A1 of the groove 321 toward the maximum groove depth end A2. When the axial moving member 40 moves toward the clutch 30, it drives the movable member 33 to move counterclockwise along the circumference of the clutch 30 to a position with a smaller groove depth in the groove 321 and presses against the elastic member 34. When the axial moving member 40 moves away from the clutch 30, the elastic member 34 resets and drives the movable member 33 to move clockwise along the circumference of the clutch 30 to a position with a larger groove depth in the groove 321.

[0134] The electromechanical braking device 100 provided in this application embodiment uses a clutch 30 that cooperates with an axially moving member 40 and an elastic member 34, allowing the movable member 33 to reciprocate within a groove 321 along the circumference of the brake motor 10. This restricts or allows the inner wheel 31 and outer wheel 32 of the clutch 30 to rotate relative to each other, thereby enabling the clutch 30 to release or lock the motor shaft of the brake motor 10. Accordingly, the electromechanical braking device 100 provided in this application embodiment not only reduces the number of parts required for parking braking but also reduces the operating time of the brake motor 10 and the drive motor 50, thereby improving the reliability of the electromechanical braking device.

[0135] Figure 9 This is a schematic diagram of a clutch in an electromechanical device provided in an embodiment of this application. In this embodiment, the end face of the outer wheel 32 of the clutch 30 facing the drive motor 50 includes a mating opening 322, which communicates with a groove 321 along the axial direction of the outer wheel 32. An axially moving member 40 passes through the mating opening 322 to drive a movable member 33.

[0136] In this embodiment, the number of openings 322 is the same as the number of grooves 321. For example... Figure 8 As shown, the outer wheel 32 includes three grooves 321. (As indicated...) Figure 9 As shown, the end face of the outer wheel 32 facing the drive motor 50 includes three mating openings 322. Each groove 321 corresponds to one mating opening 322. In this embodiment, when there are multiple mating openings 322, the structures of all mating openings 322 may be the same or different. In this embodiment, the shape of the mating opening 322 includes a rectangular opening, a circular opening, or an elliptical opening.

[0137] Figure 10This is a schematic diagram of an axially moving component of a clutch in an electromechanical device provided in an embodiment of this application. In this embodiment, the axially moving component 40 includes a transmission part 41 and a pushing part 42. The transmission part 41 is used to drive the motor shaft of the drive motor 50 and moves axially along the drive motor 50 as the motor shaft of the drive motor 50 rotates. The pushing part 42 is used to receive the driving force from the transmission part 41, move axially along the drive motor 50, and drive the movable component 33. One end of the pushing part 42 facing the drive motor 50 receives the driving force from the transmission part 41, and the other end of the pushing part 42 facing the clutch 30 drives the movable component 33 to move circumferentially along the clutch 30.

[0138] In this embodiment, the mating opening 322 is used to accommodate a portion of the axially moving member 40. In other words, when the axially moving member 40 moves toward the clutch 30 along the brake motor 10 axial direction, the pushing portion 42 of the axially moving member 40 can be inserted into the groove 321 through the mating opening 322. Figure 9 and Figure 10 As shown, the axial moving member 40 moves axially along the brake motor 10, and the pushing part 42 can push the movable member 33 to move circumferentially along the clutch 30 through the mating opening 322.

[0139] In this embodiment, the pushing part 42 and the transmission part 41 can be an integral structure or a separate structure. For example... Figure 10 As shown, the pusher 42 and the transmission 41 are an integral structure, which can improve the connection strength between the pusher 42 and the transmission 41, and improve the production efficiency of the axial moving part 40.

[0140] In this embodiment, the number of pushing parts 42, the number of moving parts 33, and the number of mating openings 322 are the same, and each pushing part 42 mates with the moving part 33 and the mating opening 322 of the outer wheel 32.

[0141] like Figure 10 As shown, there are three actuating parts 42. These three actuating parts 42 are spaced apart circumferentially along the clutch 30, and each actuating part 42 is used to actuate a movable member 33 circumferentially along the clutch 30. Figure 9 and Figure 10 As shown in the aforementioned figures, each pusher 42 can enter or exit the groove 321 through a mating opening 322, thereby pushing the movable member 33 to move circumferentially along the clutch 30. With such a structure, the axial moving member 40, while achieving a drive connection with the motor shaft of the drive motor 50, can push the movable member 33 to move circumferentially along the clutch 30, thereby allowing the clutch 30 to lock or release the other end of the motor shaft of the brake motor 10.

[0142] In this embodiment, the structures of the multiple pushing parts 42 may be the same or different. For example... Figure 14 As shown, each pusher 42 has an elongated structure, and the extension direction of the pusher 42 is parallel to the axial direction of the clutch 30. In one embodiment, the multiple pushers 42 have the same structure and the spacing between two adjacent pushers 42 is the same, which can reduce the manufacturing difficulty of the axial moving part 40 and help reduce the production cost of the axial moving part 40.

[0143] In this embodiment, the end of the pushing part 42 facing the outer wheel 32 includes a mating inclined surface 421. The inclination direction of the mating inclined surface 421 intersects the direction in which the pushing part 42 extends. Accordingly, the pushing part 42 contacts the outer peripheral surface of the movable member 33 through the mating inclined surface 421, allowing the movable member 33 to move smoothly along the circumferential direction of the brake motor 10, thereby preventing the movable member 33 from impacting the inner wheel 31 and / or the outer wheel 32.

[0144] like Figure 10 As shown, each of the two opposing sidewalls of the pusher 42 includes a mating ramp 421, and the two mating ramps 421 are spaced apart circumferentially along the clutch 30. The two mating ramps 421 are symmetrically arranged about an axis of symmetry parallel to the extending direction of the pusher 42, with the axis of symmetry located between the two mating ramps 421. This arrangement allows the outer wall of any moving part 33 to contact the mating ramp 421 of the pusher 42, thus eliminating the need to consider which pusher 42 corresponds to which moving part 33 during the assembly of the axial moving part 40 and the clutch 30, reducing the assembly difficulty of the axial moving part 40.

[0145] In this embodiment, the axial moving member 40 is connected to the motor shaft of the drive motor 50 via a transmission member 90. The transmission member 90 is used to rotate with the motor shaft of the drive motor 50 and drive the axial moving member 40 to move axially along the brake motor 10.

[0146] In this embodiment, the transmission member 90 includes a transmission screw 91 and a threaded hole 92. The transmission part 41 includes a threaded hole 92. Figure 10 As shown, the threaded hole 92 passes through the transmission part 41 of the axial moving member 40 along the axial direction of the brake motor 10. The transmission screw 91 is sleeved on the motor shaft of the drive motor 50 and fixedly connected to the motor shaft of the drive motor 50. The external thread of the transmission screw 91 meshes with the internal thread of the threaded hole 92. In this embodiment, the transmission screw 91 of the transmission member 90 is sleeved on the motor shaft of the drive motor 50, and the transmission part 41 is sleeved on the transmission screw 91 through the threaded hole 92, which can also make the axes of the axial moving member 40 and the drive motor 50 coincide.

[0147] In this embodiment, the transmission screw 91 rotates with the motor shaft of the drive motor 50 and drives the transmission part 42 to move axially along the drive motor 50 or the brake motor 10 through the threaded hole 92, thereby causing the pushing part 42 to push the movable part 33 to move circumferentially along the clutch 30.

[0148] Figure 11 This is a schematic diagram of an axially moving component of a clutch in an electromechanical device provided in an embodiment of this application. For example... Figure 11 As shown, the transmission part 41 includes a coaxial large ring part 411 and a small ring part 412. The outer diameter of the large ring part 411 is larger than the outer diameter of the small ring part 412. The large ring part 411 is fixedly connected to the pushing part 42, and the middle part of the small ring part 412 includes a threaded hole 92. The axis of the threaded hole 92 coincides with the axis of the large ring part 411 and the axis of the small ring part 412. Accordingly, while ensuring that the meshing length between the transmission part 41 and the transmission screw 91 meets the requirements, the volume of the transmission part 41 can be reduced, which helps to reduce the weight of the axial moving part 40.

[0149] The electromechanical braking device 100 provided in this application embodiment has an axial moving member 40 and a drive motor 50 connected in the clutch 30 via a transmission member 90. This not only shortens the force transmission chain between the drive motor 50 and the axial moving member 40, but also simplifies the structure of the electromechanical braking device 100 and helps improve its reliability.

[0150] Figure 12 This is another schematic diagram of the locking device in the electromechanical braking device provided in an embodiment of this application. In this embodiment, the outer wheel 32 includes a clutch positioning part 323, and the brake motor 10 includes a clutch positioning groove 11. Figure 12 As shown, the clutch positioning part 323 is a protruding structure on the end face of the outer wheel 32 facing the brake motor 10 along the axial direction of the brake motor 10. The clutch positioning groove 11 is a groove structure of the brake motor 10 facing away from the outer wheel 32 along the axial direction of the brake motor 10. Figure 5 As shown, the clutch positioning groove 11 is a groove structure of the brake motor 10 housing facing away from the outer wheel 32 along the axial direction of the brake motor 10. Correspondingly, the clutch positioning part 323 and the clutch positioning groove 11 cooperate to fix the relative position of the outer wheel 32 and the brake motor 10. In one embodiment, the clutch positioning groove 11 is a groove structure of the stator core of the brake motor 10 facing away from the outer wheel 32 along the axial direction of the brake motor 10.

[0151] In this embodiment, the positions of the clutch positioning part 323 and the clutch positioning groove 11 can be interchanged. In one embodiment, the outer wheel 32 includes the clutch positioning groove 11, and the brake motor 10 includes the clutch positioning part 323. The clutch positioning part 323 is a protrusion structure of the brake motor 10 facing the outer wheel 32 along the axial direction of the brake motor 10, and the clutch positioning groove 11 is a groove structure of the outer wheel 32 facing away from the brake motor 10 along the axial direction of the brake motor 10.

[0152] In this embodiment, the clutch positioning part 323 includes a rod-shaped structure, a block-shaped structure, or a plate-shaped structure. For example... Figure 6 As shown, the clutch positioning part 323 can be a block-shaped structure extending along the axial direction of the brake motor 10. The longitudinal section of the clutch positioning part 323 can include a clutch straight edge and a clutch arc edge. The two ends of the clutch straight edge are respectively connected to the two ends of the clutch arc edge, and the longitudinal section of the clutch positioning part 323 is perpendicular to the axial direction of the brake motor 10.

[0153] In this embodiment, the number of clutch positioning parts 323 includes one, two, three, or four. Specifically, there are two or more clutch positioning parts 323, with adjacent clutch positioning parts 323 evenly spaced along the circumference of the clutch 30. For example... Figure 6 As shown, there are two clutch positioning parts 323, and the two clutch positioning parts 323 are arranged at equal intervals along the circumference of the clutch 30.

[0154] In this embodiment, the structure of the clutch positioning groove 11 matches the structure of the clutch positioning part 323. Specifically, the number of clutch positioning grooves 11 is the same as the number of clutch positioning parts 323, with each clutch positioning groove 11 corresponding to one clutch positioning part 323.

[0155] The electromechanical braking device 100 provided in this application embodiment utilizes the clutch positioning part 323 inserted into the clutch positioning groove 11 to fix the clutch 30 and the brake motor 10. This not only restricts the relative rotation of the outer wheel 32 relative to the brake motor 10, but also reduces the difficulty of aligning the axis of the outer wheel 32, the axis of the clutch 30 and the axis of the brake motor 10.

[0156] Figure 14 This is a schematic diagram of the annular fixing member of the locking device in the electromechanical braking device provided in the embodiments of this application. Figure 14 Another schematic diagram of the annular fixing member of the locking device in the electromechanical braking device provided in the embodiments of this application. (In conjunction with...) Figure 13 , Figure 14As shown in the aforementioned figures, the annular fastener 80 includes a hollow fixing body portion 81 and a fixing connecting portion 82. The fixing body portion 81 is spaced and sleeved on the motor shaft of the drive motor 50, and is fixedly connected to the housing 50B and / or housing portion 63 of the drive motor 50. Along the radial direction of the drive motor 50, the outer diameter of the fixing body portion 81 and the fixing connecting portion 82 is larger than the outer diameter of the housing of the drive motor 50. Correspondingly, the fixing connecting portion 82 is fixedly connected to the fixing body portion 81. The end face of the fixing body portion 81 facing the drive motor 50 can abut against the step 64 of the housing portion 63, and the end face of the fixing connecting portion 82 facing the clutch 30 is used to abut against the end face of the outer wheel 32 facing the drive motor 50.

[0157] Combination Figure 13 As shown in the foregoing figures, the end face of the fixed main body 81 facing the drive motor 50 may include a motor positioning groove 83, the axis of which coincides with the axis of the drive motor 50. The housing 50B of the drive motor 50 may include a motor positioning part 51, which is inserted into the motor positioning groove 83. In one embodiment, the motor positioning part 51 has an annular structure and is sleeved on the motor shaft of the drive motor 50.

[0158] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0159] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0160] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0161] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0162] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

Claims

1. An electromechanical braking device, characterized in that, The system includes a brake motor and a locking device. One end of the motor shaft of the brake motor drives a brake, which is used to brake a vehicle. The locking device is used to lock the brake motor via the other end of the motor shaft. The locking device includes a clutch, an axial moving part, and a drive motor, wherein: The clutch is sleeved on the other end of the motor shaft of the brake motor; The axial moving member is used to move relative to the clutch along the axial direction of the brake motor and control the clutch to lock or release the other end of the motor shaft of the brake motor. The drive motor is used to drive the axial moving component to move away from or toward the clutch; The clutch includes an inner wheel, an outer wheel, a movable component, and an elastic component. The outer wheel and the inner wheel are sequentially spaced around the other end of the motor shaft of the brake motor. The inner wheel is used to fixally connect to the other end of the motor shaft of the brake motor. The inner circumferential surface of the outer wheel includes a groove. The movable component is used to move within the groove along the circumference of the brake motor. The end face of the outer wheel facing the drive motor includes a mating opening, which is connected to the groove along the axial direction of the outer wheel. The axially moving member passes through the mating opening to drive the movable member. The elastic element is used to cooperate with the axial moving element to drive the movable element to reciprocate along the circumferential direction of the clutch, wherein: The axially moving member moves toward the clutch and drives the movable member to move clockwise along the circumference of the clutch; when the axially moving member moves away from the clutch, the elastic member drives the movable member to move counterclockwise along the circumference of the clutch; or, The axial moving member moves toward the clutch and drives the movable member to move counterclockwise along the circumference of the clutch. When the axial moving member moves away from the clutch, the elastic member drives the movable member to move clockwise along the circumference of the clutch.

2. The electromechanical braking device according to claim 1, characterized in that, The opening of the groove faces the outer circumferential surface of the inner wheel, and the groove depth gradually decreases along the circumferential direction of the brake motor.

3. The electromechanical braking device according to claim 2, characterized in that, The clutch includes three movable elements, and the outer wheel includes three grooves, each groove for receiving one of the movable elements, wherein: The three grooves are equally spaced along the circumference of the brake motor; The minimum groove depth end of one of the two adjacent grooves is close to the maximum groove depth end of the other groove along the circumference of the brake motor.

4. The electromechanical braking device according to claim 3, characterized in that, The minimum groove depth of each groove is greater than the length of the movable member along the radial direction of the brake motor, and the maximum groove depth of each groove is greater than the length of the movable member along the radial direction of the brake motor.

5. The electromechanical braking device according to claim 2, characterized in that, The axial moving component includes a transmission part and a pushing part, wherein: The transmission unit is used to drive the motor shaft of the drive motor and move along the axial direction of the drive motor as the motor shaft rotates. The pushing part is used to receive the driving force of the pushing part and move along the axis of the drive motor to drive the moving part.

6. The electromechanical braking device according to claim 5, characterized in that, The end of the pushing part facing the outer wheel includes a mating inclined surface, and the inclination direction of the mating inclined surface intersects the axial direction of the drive motor.

7. The electromechanical braking device according to claim 2, characterized in that, The outer wheel includes a clutch positioning part, and the brake motor includes a clutch positioning groove. The clutch positioning part is a protruding structure of the outer wheel facing the brake motor along the axial direction of the brake motor, and the clutch positioning groove is a groove structure of the brake motor facing away from the outer wheel along the axial direction of the brake motor. The clutch positioning part and the clutch positioning groove cooperate to fix the relative position of the outer wheel and the brake motor; or, The outer wheel includes a clutch positioning groove, and the brake motor includes a clutch positioning part. The clutch positioning groove is a groove structure of the outer wheel away from the brake motor along the axial direction of the brake motor. The clutch positioning part is a protrusion structure of the brake motor facing the outer wheel along the axial direction of the brake motor. The clutch positioning part and the clutch positioning groove cooperate to fix the relative position of the outer wheel and the brake motor.

8. The electromechanical braking device according to claim 7, characterized in that, The locking device includes a housing component for fixing the brake motor and for accommodating the clutch, the axial moving component, and the drive motor. The housing component includes a connection opening, wherein: The connecting opening is used to connect the inside and outside of the housing component. The connecting opening faces the brake motor. The inner wheel is fixedly connected to the other end of the motor shaft of the brake motor through the connecting opening. The end of the outer wheel facing the brake motor abuts against the housing of the brake motor through the connecting opening.

9. The electromechanical braking device according to claim 8, characterized in that, The locking device includes an annular fixing member, which is disposed inside the housing and arranged between the clutch and the drive motor. The annular fixing member is fixedly connected to the outer wheel by a positioning member, which includes a positioning ring and a positioning groove, wherein: The end face of the annular fixing member facing the outer wheel includes the positioning ring, and the end face of the outer wheel facing the annular fixing member includes the positioning groove; or, The end face of the annular fastener facing the outer wheel includes the positioning groove, and the end face of the outer wheel facing the annular fastener includes the positioning ring.

10. The electromechanical braking device according to any one of claims 1 to 9, characterized in that, The axial moving component is connected to the motor shaft of the drive motor via a transmission component. The transmission component is used to rotate with the motor shaft of the drive motor and drive the axial moving component to move along the axial direction of the brake motor.

11. The electromechanical braking device according to claim 10, characterized in that, The transmission component includes a transmission screw and a threaded hole. The threaded hole passes through the transmission part of the axial moving component along the axial direction of the brake motor. The transmission screw is sleeved on the motor shaft of the drive motor and fixedly connected to the motor shaft of the drive motor. The axial moving component is sleeved on the transmission screw through the threaded hole. The external thread of the transmission screw meshes with the internal thread of the threaded hole.

12. The electromechanical braking device according to claim 1, characterized in that, Along the axial direction of the brake motor, the axially moving member is arranged between the clutch and the drive motor, and the axes of the brake motor, the axially moving member, the clutch, and the drive motor coincide.

13. A vehicle, characterized in that, It includes a wheel and an electromechanical braking device as described in any one of claims 1 to 12, the electromechanical braking device being used to brake the wheel.

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