Electromechanical brake device and vehicle

Abstract

The invention provides an electronic mechanical braking device and a vehicle. The electronic mechanical braking device comprises a braking motor and a parking mechanism, the braking motor outputs braking force through a motor shaft, the parking mechanism comprises a rotating shaft, a connecting rod, a driving piece, a ratchet wheel and a pawl, and the rotating shaft and the motor shaft are arranged at intervals in the radial direction of the motor shaft. The connecting rod comprises a first end and a second end which are opposite; the middle section of the connecting rod is rotationally connected with the rotating shaft; the driving part is in transmission connection with the first end and drives the second end to rotate around the rotating shaft through the first end. The ratchet wheel is arranged on the peripheral face of the motor shaft in a sleeving mode, the pawl is elastically connected to the second end, when the second end is stopped at the first stopping position, the pawl and ratchets of the ratchet wheel are meshed in a single-face mode in the circumferential direction of the motor shaft, and when the second end is stopped at the second stopping position, the pawl releases the ratchets of the ratchet wheel. According to the electronic mechanical braking device, the amplitude of following motion in the re-clamping process is reduced by optimizing the structure of the parking mechanism, and the service life of the electronic mechanical braking device is prolonged on the premise that the parking reliability is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to an electromechanical braking device and a vehicle. Background Art

[0002] Integrating a parking mechanism in an electromechanical braking device enables it to have a parking function. The parking mechanism is used to unidirectionally lock the electromechanical braking device to prevent the friction plate from loosening the brake disc. To improve reliability, it is required that the electromechanical braking device re-clamp the brake disc after being unidirectionally locked by the parking mechanism for a period of time to eliminate the possible gap formed after cooling between the brake disc and the friction plate. The parking mechanism will generate a following movement during the re-clamping process of the electromechanical braking device. If the amplitude of the following movement is too large, it may lead to wear after long-term use. Summary of the Invention

[0003] The present application provides an electromechanical braking device and a vehicle. By optimizing the structure of the parking mechanism integrated in the electromechanical braking device, the amplitude of the following movement of the parking mechanism during the re-clamping process of the electromechanical braking device is reduced, and the service life of the electromechanical braking device is extended on the premise of ensuring parking reliability.

[0004] In a first aspect, the present application provides an electromechanical braking device. The electromechanical braking device includes a braking motor and a parking mechanism. The braking motor outputs braking force through a motor shaft. The parking mechanism includes a rotating shaft, a connecting rod, a driving member, a ratchet wheel, and a pawl. The rotating shaft and the motor shaft are arranged at intervals along the radial direction of the motor shaft, and the central axis of the rotating shaft is parallel to the central axis of the motor shaft; the connecting rod includes opposite first and second ends, and the middle section of the connecting rod is used for rotatably connecting to the rotating shaft. The first and second ends are respectively arranged on both sides of the middle section along the radial direction of the rotating shaft; the driving member is used for drivingly connecting the first end, and the driving member is used for driving the second end to rotate around the rotating shaft through the first end. The second end is used to stop at a first stop position or a second stop position; the ratchet wheel is used for sleeving on the outer peripheral surface of the motor shaft; the pawl is elastically connected to the second end. When the second end stops at the first stop position, the pawl meshes with the ratchet teeth of the ratchet wheel unidirectionally along the circumferential direction of the motor shaft. When the second end stops at the second stop position, the pawl releases the ratchet teeth of the ratchet wheel.

[0005] The electromechanical braking device provided by the present application realizes the one-way locking function of the motor shaft during parking by the parking mechanism acting on the outer peripheral surface of the motor shaft. Among them, the driving member and the pawl are arranged on both sides of the rotating shaft. The driving member drives the pawl to rotate towards the ratchet through the connecting rod and engages with the ratchet teeth on one side of the ratchet, or the driving member drives the pawl to rotate away from the ratchet through the connecting rod and releases the ratchet teeth of the ratchet. The electromechanical braking device provided by the present application also elastically connects the second end of the connecting rod to the pawl, so that during the re-clamping process of the electromechanical braking device, only the motor shaft needs to be driven to drive the ratchet to rotate in the reverse direction, and the ratchet pushes the pawl towards the second end to retract to complete the operation. During the re-clamping process of the electromechanical braking device, the connecting rod and the driving member can remain relatively stationary, that is, during the re-clamping process, the following movement amplitude of the parking mechanism is small, and the driving member can always maintain the tendency to lock the ratchet. The electromechanical braking device provided by the present application extends the service life of the electromechanical braking device on the premise of ensuring parking reliability.

[0006] In one implementation, the pawl includes an engaging surface for engaging with the ratchet teeth when the second end stops at the first stop position. The central axis of the motor shaft and the central axis of the rotating shaft are arranged on the same side of the central vertical line of the engaging surface.

[0007] In this implementation, the central vertical line of the engaging surface of the pawl is the pressure direction when the pawl engages with the ratchet teeth on one side. Defining that the central axis of the motor shaft and the central axis of the rotating shaft are arranged on the same side of the central vertical line of the engaging surface can enable the moment formed by the pressure of the ratchet teeth on the pawl to drive the connecting rod towards the first stop position, avoiding the moment received by the pawl driving the connecting rod towards the second stop position to unlock the single-phase engagement between the pawl and the ratchet teeth.

[0008] In one implementation, the engaging surface faces the rotating shaft along the arrangement direction of the motor shaft and the rotating shaft.

[0009] In this implementation, defining the orientation of the engaging surface where the pawl is in contact with the ratchet teeth facilitates the electromechanical braking device to push the pawl towards the rotating shaft during the re-clamping process, thereby ensuring reliable rotation of the ratchet and realizing the re-clamping function.

[0010] In one implementation, the braking motor outputs braking force by driving the motor shaft to rotate, and the one-sided engagement between the pawl and the ratchet teeth is used to limit the rotation of the motor shaft in the opposite direction of the output braking force.

[0011] In this implementation, when the braking motor outputs braking force, the rotation direction of the motor shaft corresponds to the movement direction of the friction plate clamping the brake disc, and the rotation direction of the motor shaft is the same as that during parking and reclamping of the electromechanical braking device. The rotation direction of the one-way engagement between the pawl and the ratchet teeth is opposite to the rotation direction of the motor shaft when it outputs braking force, which can prevent the motor shaft from reversing and causing the friction plate to loosen the brake disc, thereby improving the reliability of the parking function of the electromechanical braking device.

[0012] In one implementation, the rotation direction of the second end rotating from the first parking position to the second parking position is the same as the rotation direction of the motor shaft when it outputs braking force. In this implementation, the rotation direction of the connecting rod relative to the ratchet during the process of locking or releasing the ratchet teeth is defined, which facilitates the connecting rod to drive the pawl to engage or disengage from the ratchet teeth, and avoids interference between the pawl and the ratchet, thereby preventing the parking mechanism from jamming.

[0013] In one implementation, the sliding dimension range of the pawl relative to the second end is greater than the tooth height of the ratchet teeth. Thus, during the process of the motor shaft driving the ratchet to rotate and reclamp, the pawl slides back towards the second end, which can clear the ratchet teeth and prevent displacement of the driving member and the connecting rod.

[0014] In one implementation, the parking mechanism includes a spring. The pawl is rotatably or slidably connected to the second end. The spring abuts between the connecting rod and the pawl and is used to drive the pawl to rotate or slide towards the ratchet.

[0015] In this implementation, by using the spring to abut the pawl to rotate or slide relative to the second end, it is convenient for the ratchet teeth to push the pawl during the reclamping process of the electromechanical braking device, so that the spring is compressed and the pawl retracts to the second end, and then the ratchet continues to rotate to achieve the reclamping function.

[0016] In one implementation, the pawl is rotatably connected to the second end and is located between the second end and the rotating shaft. The spring is a reed, and the reed is used to push the pawl to rotate towards the ratchet.

[0017] In this implementation, the pawl extends from the second end towards the first end along the length direction of the connecting rod and is rotatably connected to the second end. The spring configured as a reed can abut against the middle section of the connecting rod and push the pawl to rotate towards the ratchet.

[0018] In one implementation, the connecting rod includes a receiving groove. Along the arrangement direction of the second end and the first end, the receiving groove is located between the second end and the rotating shaft. Along the direction perpendicular to the arrangement direction of the second end and the first end, the notch of the receiving groove faces the ratchet. The receiving groove is used to receive the pawl and the reed.

[0019] In this implementation, the connecting rod can form a structure that opens a receiving groove to accommodate the reed and can accommodate part of the pawl when the pawl is pushed back by the ratchet teeth, thereby reducing the overall volume of the parking mechanism and facilitating the miniaturization of the electromechanical braking device.

[0020] In one implementation, the accommodating groove includes a first groove wall and a second groove wall relative to each other along the arrangement direction of the second end and the first end, the first groove wall is arranged between the first end and the second groove wall, the spring is fixed to the first groove wall, and the pawl is rotatably connected to the second groove wall.

[0021] In this implementation, the pawl and the spring are respectively installed on the two opposite groove walls of the accommodating groove. The pawl and the spring extend toward each other along the length direction of the connecting rod, which can reasonably utilize the internal space of the accommodating groove and form an effect of gradually increasing thrust of the spring during the retraction of the pawl, thereby ensuring that the pawl is reliably reset.

[0022] In one implementation, the pawl is rotatably connected to the second end and is located on a side of the second end away from the rotating shaft. The spring is a coil spring, and the coil spring is used to drive the pawl to rotate toward the ratchet wheel.

[0023] In this embodiment, the pawl extends from the second end in a direction away from the first end along the length of the connecting rod and is rotatably connected to the second end. A spring configured as a coil spring can be located at the rotatable connection between the pawl and the second end to drive the pawl to rotate toward the ratchet wheel.

[0024] In one implementation, the connecting rod includes a first section and a second section connected to each other, the first section is located between the rotating shaft and the first end, the second section is located between the rotating shaft and the second end, the first section and the second section intersect, and the opening of the angle between the first section and the second section faces away from the motor shaft.

[0025] In this implementation, the extension path of the connecting rod is bent toward the motor shaft, which can shorten the distance between the driving member and the motor shaft, reduce the overall volume of the parking mechanism, and facilitate the miniaturization of the electronic mechanical brake device.

[0026] In one implementation, the connecting rod includes a third section, the second end is connected to the second section through the third section, the third section intersects with the second section, and the opening of the angle between the third section and the second section faces the motor shaft.

[0027] In this implementation, the connecting rod is further bent between the rotating shaft and the second end, creating an angle between the second and third sections with the opening facing the motor shaft. This further shortens the distance between the pawl and the ratchet wheel and reduces the connecting rod's rotation angle around the rotating shaft. This further reduces the overall size of the parking mechanism, facilitating miniaturization of the electromechanical brake device.

[0028] In one implementation, along the arrangement direction perpendicular to the second end and the first end, the outer circumferential radius of the ratchet is greater than the distance between the second end and the central axis of the motor shaft, and greater than the distance between the central axis of the rotating shaft and the central axis of the motor shaft.

[0029] In this implementation, by setting a bend on the extension path of the connecting rod, the rotating shaft and the second end can be made to approach the ratchet wheel respectively, thereby reducing the overall volume of the parking mechanism, which is beneficial to the miniaturization of the electromechanical braking device.

[0030] An implementation, the driving member includes a parking motor, the parking motor is a linear motor, the stator of the parking motor is fixed to the housing of the electromechanical braking device, and the mover of the parking motor is used to slide relative to the stator and drive the first end to rotate around the rotating shaft.

[0031] In this implementation, the driving member is a parking motor, the parking motor is a linear motor, the mover of the parking motor slides relative to the stator of the parking motor and drives the first end to rotate around the rotating shaft, thereby driving the pawl through the second end.

[0032] An implementation, one of the mover of the parking motor and the first end includes a sliding pin, and the other of the mover of the parking motor and the first end includes a sliding groove. The sliding pin is used to extend into the sliding groove and slide therein, and the length direction of the sliding groove intersects with the sliding direction of the mover.

[0033] In this implementation, since both the mover of the parking motor and the connecting rod are rigid bodies, the movement trajectory of the first end is a straight line during the process of the mover of the parking motor driving the first end of the connecting rod to slide. Through the cooperation of the sliding groove and the sliding pin, the freedom degree in the radial direction of the motor shaft of the braking motor between the mover of the parking motor and the connecting rod can be released, and the effect of rotating around the motor shaft during the sliding of the first end along with the mover of the parking motor can be achieved.

[0034] An implementation, the driving member includes a parking motor, the parking motor is a rotary motor, the stator of the parking motor is fixed to the housing of the electromechanical braking device, and the rotor of the parking motor is used to drive the connecting rod through a lead screw nut transmission and drive the first end to rotate around the rotating shaft.

[0035] In this implementation, the parking motor adopts the form of a rotary motor and drives the first end to rotate around the rotating shaft through a lead screw nut. Wherein, the lead screw or the nut in the lead screw nut is used to rotate synchronously with the rotor of the parking motor, and the nut or the lead screw in the lead screw nut is used to slide along the central axis direction of the parking motor and drive the first end to rotate around the rotating shaft. The cost of the parking motor is relatively low and it is convenient to control.

[0036] An implementation, the lead screw nut and the first end are in a cooperative movement through the way of a sliding pin and a sliding groove.

[0037] An implementation, the driving member includes an electromagnet and a slider, the electromagnet is fixed to the housing of the electromechanical braking device, the slider is slidably connected to the housing of the electromechanical braking device, and the electromagnet is used to drive the slider to slide and drive the first end to rotate around the rotating shaft.

[0038] In this implementation, the driving member is an electromagnet and a slider. The electromagnet drives the slider to drive the first end closer to or farther from the electromagnet by switching between the energized and de-energized states, thereby realizing the operation of driving the pawl through the connecting rod. The movement trajectory of the slider can be in a curved shape to adapt to the rotation of the first end around the motor shaft.

[0039] In a second aspect, the present application provides a vehicle, which includes wheels and the electromechanical braking device provided in any of the above implementations. The electromechanical braking device is fixed to the vehicle frame and is used to brake the brake disc of the wheel. Since the vehicle provided in the present application adopts the above electromechanical braking device, the reliability of parking is improved and the service life of the electromechanical braking device is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] To more clearly illustrate the technical solutions of the present application, the drawings required for the implementation will be briefly introduced below. Obviously, the drawings in the following description are only some implementations of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 Schematic diagram of the structure of the vehicle provided in an embodiment of the present application at the wheel;

[0042] Figure 2 Schematic diagram of the framework of the electromechanical braking device provided in an embodiment of the present application;

[0043] Figure 3 Schematic diagram of the partial structure of the electromechanical braking device provided in an embodiment of the present application;

[0044] Figure 4 Schematic diagram of the partial structure of the electromechanical braking device provided in an embodiment of the present application;

[0045] Figure 5 Schematic diagram of the structure of the ratchet in the electromechanical braking device provided in an embodiment of the present application;

[0046] Figure 6 Schematic diagram of the structure of the parking mechanism in the second parking position of the electromechanical braking device provided in an embodiment of the present application;

[0047] Figure 7 Schematic diagram of the partial structure of the electromechanical braking device provided in an embodiment of the present application;

[0048] Figure 8 Schematic diagram of the partial structure of the electromechanical braking device provided in an embodiment of the present application;

[0049] Figure 9 Schematic diagram of a partial structure of an electromechanical braking device provided by an embodiment of the present application;

[0050] Figure 10 Schematic diagram of a partial structure of an electromechanical braking device provided by an embodiment of the present application;

[0051] Figure 11 Schematic diagram of a partial structure of an electromechanical braking device provided by an embodiment of the present application;

[0052] Figure 12 Schematic diagram of a partial structure of an electromechanical braking device provided by an embodiment of the present application;

[0053] Figure 13 Schematic diagram of a partial structure of an electromechanical braking device provided by an embodiment of the present application. Detailed implementation manners

[0054] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0055] The present application provides an electromechanical braking device. The electromechanical braking device includes a braking motor and a parking mechanism. The braking motor outputs a braking force through a motor shaft. The parking mechanism includes a rotating shaft, a connecting rod, a driving member, a ratchet wheel, and a pawl. The rotating shaft and the motor shaft are arranged at intervals along the radial direction of the motor shaft, and the central axis of the rotating shaft is parallel to the central axis of the motor shaft; the connecting rod includes opposite first and second ends. The middle section of the connecting rod is used for rotatably connecting to the rotating shaft, and the first and second ends are respectively arranged on both sides of the middle section along the radial direction of the rotating shaft; the driving member is used for drivingly connecting to the first end, and the driving member is used for driving the second end to rotate around the rotating shaft through the first end. The second end is used to stop at a first stop position or a second stop position; the ratchet wheel is used for sleeving on the outer peripheral surface of the motor shaft; the pawl is elastically connected to the second end. When the second end stops at the first stop position, the pawl is in one-way meshing with the ratchet teeth of the ratchet wheel along the circumferential direction of the motor shaft. When the second end stops at the second stop position, the pawl releases the ratchet teeth of the ratchet wheel. During the re-clamping process of the electromechanical braking device, the connecting rod and the driving member can remain relatively stationary, which extends the service life of the electromechanical braking device on the premise of ensuring the parking reliability.

[0056] The present application provides a vehicle, which includes wheels and the electromechanical braking device provided by any of the above implementation manners. The electromechanical braking device is fixed to the vehicle frame and is used to brake the brake disc of the wheel. Since the vehicle provided by the present application adopts the above electromechanical braking device, the reliability of parking is improved and the service life of the electromechanical braking device is extended.

[0057] Please refer to Figure 1 and Figure 2 , where Figure 1 schematically shows the structural diagram of the vehicle provided by an embodiment of the present application at the wheel 200; Figure 2 schematically shows the frame diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0058] The vehicle provided by the present application includes a wheel 200 and an electromechanical braking device 100. The wheel 200 is rotatably connected to the vehicle frame. The wheel 200 includes a brake disc 201. The brake disc 201 is fixed to the hub of the wheel 200. During the driving of the vehicle, the brake disc 201 is used to rotate synchronously with the hub of the wheel 200. The electromechanical braking device 100 is the electromechanical braking device provided synchronously by the embodiment of the present application. The electromechanical braking device 100 is fixed to the vehicle frame. The electromechanical braking device 100 is used to contact the brake disc 201 to form a frictional force, thereby restricting the rotation of the wheel 200 to brake the vehicle.

[0059] The electromechanical braking device 100 provided by the present application includes a braking motor 20, and the braking motor 20 is used to output a braking force. In an embodiment, the braking motor 20 includes a motor shaft 21, a motor stator and a motor rotor. The motor stator is coaxially sleeved outside the motor rotor. The motor stator of the braking motor 20 is fixed to the housing of the electromechanical braking device 100, and the motor shaft 21 is fixedly connected to the motor rotor. The motor stator is used to receive a braking signal to generate an alternating magnetic field, so as to drive the motor rotor and the motor shaft 21 to rotate synchronously to output a braking force.

[0060] In an embodiment, the electromechanical braking device 100 provided by the present application includes a caliper 10 and two friction pads 50. The caliper 10 is used to drive the two friction pads 50 to brake the brake disc 201. Along the axial direction of the brake disc 201, the two friction pads 50 are arranged on both sides of the brake disc 201, and the braking motor 20 cooperates with the caliper 10 to drive the two friction pads 50 to slide towards the brake disc 201 respectively to brake the brake disc 201.

[0061] In one embodiment, the electromechanical braking device 100 includes a speed reducer 40. The braking motor 20 is used to output a braking force. The speed reducer 40 is used to receive the braking force and drive the friction plate 50 to brake. The motor shaft 21 is used for driving connection with the input shaft of the speed reducer 40. The braking motor 20 is used to drive the friction plate 50 to move towards the brake disc 201 through the speed reducer 40, so that the friction plate 50 contacts the brake disc 201 to form a frictional force, thereby restricting the rotation of the wheel 200 to brake the vehicle.

[0062] In one embodiment, the electromechanical braking device 100 includes a lead screw nut 60. The speed reducer 40 is used for driving connection between the motor shaft 21 of the braking motor 20 and the lead screw nut 60. The lead screw or nut in the lead screw nut 60 is used to receive the drive rotation of the speed reducer 40, and the nut or lead screw in the lead screw nut 60 is used to drive the friction plate 50 to slide towards the brake disc 201.

[0063] In one embodiment, the caliper 10 is used for sliding connection with a screw sleeve 11, and the screw sleeve 11 is used to receive the drive to push the friction plate 50 to brake the brake disc 201. The lead screw nut 60 is used for driving connection between the speed reducer 40 and the screw sleeve 11, and the screw sleeve 11 is used to abut against a friction plate 50 to push the friction plate 50 to brake the brake disc 201. In one embodiment, the screw sleeve 11 is drivingly connected between the lead screw nut 60 and a friction plate 50.

[0064] In one embodiment, the electromechanical braking device 100 provided by the present application further includes a housing, and the housing is used to accommodate the braking motor 20 and the speed reducer 40. The caliper 10 is used to accommodate the screw sleeve 11. In one embodiment, the caliper 10 is further used to accommodate the lead screw nut 60. The speed reducer 40 is drivingly connected with the lead screw nut 60. In one embodiment, the housing is used to accommodate and fix the motor stator of the braking motor 20. In one embodiment, the caliper 10 is used to accommodate and fix the motor stator of the braking motor 20.

[0065] In one embodiment, the electromechanical braking device 100 further includes a caliper bracket 101, and the caliper bracket 101 is fixed to the vehicle frame and is slidably connected with the caliper 10. The caliper bracket 101 is also used for slidably connecting two friction plates 50. During the braking process of the vehicle of the present application, the power output by the motor shaft 21 of the braking motor 20 is sequentially transmitted to the two friction plates 50 through the speed reducer 40, the lead screw nut 60 and the screw sleeve, so as to drive the friction plates 50 to slide towards the brake disc 201 from both sides to brake the wheel 200.

[0066] During the operation of the electro-mechanical braking device 100 of the present application, when the motor stator of the braking motor 20 receives a braking signal, the motor stator drives the motor rotor to drive the motor shaft 21 to rotate. The motor shaft 21 drives the lead screw nut 60 to rotate synchronously through the speed reducer 40. The lead screw nut 60 then pushes a friction plate 50 towards the brake disc 201 through the screw sleeve 11. After one friction plate 50 abuts against the brake disc 201, the braking motor 20 continues to output braking force through the motor shaft 21, and the caliper 10 slides relative to the caliper bracket 101 and drives the other friction plate 50 towards the brake disc 201 to slide. Thus, the two friction plates 50 clamp the brake disc 201 from both sides of the brake disc 201, and the two friction plates 50 and the brake disc 201 form a frictional force, thereby braking the wheel 200.

[0067] Please refer to Figures 3 - 6 , in which Figure 3 shows a partial structural schematic diagram of the electro-mechanical braking device 100 provided by an embodiment of the present application; Figure 4 shows a partial structural schematic diagram of the electro-mechanical braking device 100 provided by an embodiment of the present application; Figure 5 shows a structural schematic diagram of the ratchet wheel 211 in the electro-mechanical braking device 100 provided by an embodiment of the present application; Figure 6 shows a structural schematic diagram of the parking mechanism 30 in the second parking position 02 of the electro-mechanical braking device 100 provided by an embodiment of the present application.

[0068] The electro-mechanical braking device 100 provided by the present application includes a parking mechanism 30. The braking motor 20 outputs braking force through the motor shaft 21. A ratchet wheel 211 is sleeved on the outer peripheral surface of the motor shaft 21. The parking mechanism 30 includes a rotating shaft 31, a connecting rod 32, a driving member 33, a ratchet wheel 211 and a pawl 34. The rotating shaft 31 and the motor shaft 21 are arranged at intervals along the radial direction of the motor shaft 21, and the central axis of the rotating shaft 31 is parallel to the central axis of the motor shaft 21. The connecting rod 32 includes opposite first end 321 and second end 322. The middle section of the connecting rod 32 is used for rotatably connecting the rotating shaft 31, and the first end 321 and the second end 322 of the connecting rod 32 are respectively arranged on both sides of the middle section of the connecting rod 32.

[0069] Along the arrangement direction of the first end 321 and the second end 322, the driving member 33 is arranged on the side of the first end 321 away from the second end 322. The driving member 33 is fixed to the housing of the electro-mechanical braking device 100 and can move relative to the housing of the electro-mechanical braking device 100. The driving member 33 is used for drivingly connecting the first end 321, and the driving member 33 is used for driving the connecting rod 32 to rotate around the rotating shaft 31 through the first end 321. That is, the driving member 33 is used for driving the second end 322 to rotate around the rotating shaft 31 through the first end 321.

[0070] The pawl 34 is elastically connected to the second end 322. The second end 322 is configured to stop at the first stop position 01 or the second stop position 02 during the rotation around the rotation shaft 31. When the second end 322 stops at the first stop position 01, the pawl 34 is in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211 along the circumferential direction of the motor shaft 21. When the second end 322 stops at the second stop position 02, the pawl 34 releases the ratchet teeth 212 of the ratchet wheel 211.

[0071] As Figure 3 and Figure 4 shown, when the second end 322 stops at the first stop position 01, the pawl 34 is embedded in the outer peripheral surface of the ratchet wheel 211 and is in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211. In the embodiment of the present application, single-sided engagement means that the ratchet teeth 212 of the ratchet wheel 211 are engaged with the pawl 34 along one circumferential rotation direction of the motor shaft 21, and the pawl 34 restricts the ratchet wheel 211 from rotating relative to the motor shaft 21 along this one rotation direction because of abutting against the ratchet teeth 212. Along the other circumferential rotation direction of the motor shaft 21, the ratchet teeth 212 of the ratchet wheel 211 can rotate by pushing the pawl 34. Since the ratchet wheel 211 is sleeved on the outer peripheral surface of the motor shaft 21, the ratchet wheel 211 is fixed to the motor shaft 21 along the circumferential direction of the motor shaft 21. Thus, the single-sided engagement between the ratchet teeth 212 of the ratchet wheel 211 and the pawl 34 can restrict the motor shaft 21 from rotating in one circumferential direction and allow the motor shaft 21 to rotate in the other circumferential direction.

[0072] In the embodiment of the present application, when the second end 322 stops at the first stop position 01, after the pawl 34 is in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211, it restricts the motor shaft 21 from rotating in the positive circumferential rotation direction. The direction in which the motor shaft 21 drives the ratchet wheel 211 to rotate and pushes the pawl 34 through the ratchet teeth 212 of the ratchet wheel 211 is the reverse rotation direction. Thus, when the second end 322 stops at the first stop position 01, the pawl 34 is used to restrict the positive rotation of the motor shaft 21 and allow the reverse rotation of the motor shaft 21.

[0073] Exemplarily, when the second end 322 stops at the first stop position 01, the pawl 34 is in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211 to restrict the motor shaft 21 from rotating clockwise and allow the motor shaft 21 to rotate counterclockwise. At this time, the positive rotation of the motor shaft 21 is in the clockwise direction, and the reverse rotation of the motor shaft 21 is in the counterclockwise direction; or, the pawl 34 is in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211 to restrict the motor shaft 21 from rotating counterclockwise and allow the motor shaft 21 to rotate clockwise. At this time, the positive rotation of the motor shaft 21 is in the counterclockwise direction, and the reverse rotation of the motor shaft 21 is in the clockwise direction.

[0074] An embodiment, in which the pawl 34 is slidably connected to the second end 322 and receives an elastic force for sliding towards the ratchet wheel 211. The size range of the sliding of the pawl 34 relative to the second end 322 is greater than the tooth height of the ratchet teeth 212 of the ratchet wheel 211. Thus, during the process of the motor shaft 21 driving the ratchet wheel 211 to rotate and then clamp again, the ratchet teeth 212 push the pawl 34 to slide back towards the second end 322 after overcoming the elastic force. The sliding-back size of the pawl 34 is equal to the tooth height of the ratchet teeth 212, so that the pawl 34 can give way to the ratchet teeth 212 of the ratchet wheel 211, and the driving member 33 and the connecting rod 32 remain relatively stationary during the process of the ratchet wheel 211 clamping again without displacement.

[0075] In the embodiment of the present application, it is defined that the forward rotation direction of the motor shaft 21 is the direction in which the electromechanical braking device 100 outputs braking force, that is, the motor shaft 21 rotates forward to drive the two friction plates 50 to move towards the brake disc 201 and brake the wheel. When the motor shaft 21 rotates in reverse, it drives the two friction plates 50 to release the brake disc. Thus, when the vehicle is parked, it is necessary to drive the two friction plates 50 to clamp the brake disc 201 through the electromechanical braking device 100 to prevent the wheel from rotating. At this time, the motor shaft 21 also rotates forward to achieve this. That is, the motor shaft 21 in the electromechanical braking device 100 rotates forward to realize the functions of braking and parking, and the motor shaft 21 rotates in reverse to release the braking and the parked state.

[0076] For the convenience of description, unless otherwise specified, the cooperation between the pawl 34 and the ratchet wheel 211 in each subsequent embodiment of the present application is based on the state where the second end 322 stops at the first stop position 01.

[0077] An embodiment, in which the braking motor 20 outputs braking force by driving the motor shaft 21 to rotate. The pawl 34 is in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211 to limit the reverse rotation of the motor shaft 21 in the direction opposite to the output of the braking force. That is, when the second end 322 stops at the first stop position 01, the pawl 34 is in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211 to limit the reverse rotation of the motor shaft 21 and allow the forward rotation of the motor shaft 21. In this embodiment, when the braking motor 20 outputs braking force, the rotation direction of the motor shaft 21 corresponds to driving the friction plates 50 to clamp the brake disc 201, that is, the rotation direction of the braking motor 20 when the electromechanical braking device 100 parks and clamps again. The rotation direction of the parking mechanism 30 in single-sided engagement with the ratchet teeth 212 of the ratchet wheel 211 is opposite to the rotation direction of the motor shaft 21 when the braking motor 20 outputs braking force. The reverse rotation of the motor shaft 21 can be restricted by the ratchet wheel 211 to avoid the parking failure caused by the friction plates 50 releasing the brake disc 201.

[0078] An embodiment, the ratchet wheel 211 includes a plurality of ratchet teeth 212. The plurality of ratchet teeth 212 are located on the outer peripheral surface of the ratchet wheel 211, and the plurality of ratchet teeth 212 are arranged at intervals in the circumferential direction of the motor shaft 21. When the second end 322 stops at the first stop position 01, the pawl 34 is used to embed into the gap between two adjacent ratchet teeth 212 and form a one-way engagement with the ratchet tooth 212, so as to limit the reverse rotation of the motor shaft 21 through the ratchet wheel 211. Along the circumferential direction of the motor shaft 21, one side of the ratchet tooth 212 is an inclined surface. When the motor shaft 21 rotates forward, the inclined surface of the ratchet tooth 212 is used to push the pawl 34 back and avoid the ratchet tooth 212, so as to realize the forward rotation action of the motor shaft 21.

[0079] When the second end 322 stops at the second stop position 02, the second end 322 of the connecting rod 32 rotates in a direction away from the ratchet wheel 211, and drives the pawl 34 to withdraw from the ratchet teeth 212 of the ratchet wheel 211. The pawl 34 disengages from the ratchet teeth 212 of the ratchet wheel 211. At this time, the parking mechanism 30 no longer restricts the forward or reverse rotation of the ratchet wheel 211. At this time, the braking motor 20 can normally drive the friction plate 50 to clamp or release the brake disc 201 through the motor shaft 21.

[0080] The electro-mechanical braking device 100 provided by the present application cooperates with the ratchet wheel 211 sleeved on the outer peripheral surface of the motor shaft 21 through the parking mechanism 30 to realize the one-way locking function of the motor shaft 21 during the parking process. The driving member 33 and the pawl 34 are arranged on both sides of the rotating shaft 31. The driving member 33 drives the pawl 34 to rotate towards the ratchet wheel 211 through the connecting rod 32 and form a one-way engagement with the ratchet teeth 212 of the ratchet wheel 211, or the driving member 33 drives the pawl 34 to rotate away from the ratchet wheel 211 through the connecting rod 32 and release the ratchet teeth 212 of the ratchet wheel 211.

[0081] The electro-mechanical braking device 100 provided by the present application also elastically connects the second end 322 of the connecting rod 32 to the pawl 34, so that during the re-clamping process of the electro-mechanical braking device 100, only the motor shaft 21 needs to be driven to drive the ratchet wheel 211 to rotate in the reverse direction, and the ratchet teeth 212 of the ratchet wheel 211 push the pawl 34 back towards the second end 322 to complete the operation. During the re-clamping process of the electro-mechanical braking device 100, the connecting rod 32 and the driving member 33 can remain relatively stationary, that is, during the re-clamping process, the following movement amplitude of the parking mechanism 30 is small, and the driving member 33 can always maintain the tendency to lock the ratchet wheel 211.

[0082] The electro-mechanical braking device 100 provided by the present application extends the service life of the electro-mechanical braking device 100 on the premise of ensuring the parking reliability. The vehicle provided by the present application adopts the above electro-mechanical braking device 100, which improves the parking reliability and extends the service life of the electro-mechanical braking device 100.

[0083] In an embodiment, the motor shaft 21 is also arranged adjacent to and meshed with the gear of the speed reducer 40 to output braking force. Along the direction in which the motor shaft 21 and the gear of the speed reducer 40 are arranged, the connecting rod 32 is located on the side of the motor shaft 21 away from the gear of the speed reducer 40. Along the direction perpendicular to the arrangement direction of the motor shaft 21 and the gear of the speed reducer 40, the driving member 33 is arranged on one side of the motor shaft 21. Thus, the parking mechanism 30 can be arranged by using the radial space of the motor shaft 21 and is close to the motor shaft 21. The extension length of the connecting rod 32 can be reduced, and the overall volume of the parking mechanism 30 can be reduced. Since the radius of the gear of the speed reducer 40 is larger than the diameter of the motor shaft, the parking mechanism 30 will not increase the overall volume of the electromechanical braking device 100.

[0084] In an embodiment, the caliper 10 and the housing are fixedly adjacent along the axial direction of the motor shaft 21. The parking mechanism 30 is embedded in the caliper 10 or in the housing. In an embodiment, a part of the parking mechanism 30 is embedded in the caliper 10 and another part is embedded in the housing. Thus, the size of the electromechanical braking device 100 along the axial direction of the motor shaft 21 can be compressed, and the caliper 10 and the housing can form a receiving and protecting effect on the parking mechanism 30.

[0085] In an embodiment, the rotation direction of the second end 322 from the first parking position 01 to the second parking position 02 is the same as the rotation direction of the motor shaft 21 when outputting braking force. That is, when the second end 322 is parked at the first parking position 01, the pawl 34 is in one-sided meshing with the ratchet teeth 212 of the ratchet wheel 211 to limit the reverse rotation of the motor shaft 21. The rotation direction of the second end 322 from the first parking position 01 to the second parking position 02 is the same as the forward rotation direction of the motor shaft 21. In this embodiment, the rotation direction of the connecting rod 32 relative to the ratchet wheel 211 during the process of locking or releasing the ratchet teeth 212 of the ratchet wheel 211 is defined, which is convenient for the connecting rod 32 to drive the pawl 34 to be embedded in or released from the ratchet teeth 212 of the ratchet wheel 211, and to avoid interference between the pawl 34 and the ratchet teeth 212 of the ratchet wheel 211, thereby causing jamming of the parking mechanism 30.

[0086] In other words, when the second end 322 rotates from the second parking position 02 to the first parking position 01, the rotation direction is the same as the reverse rotation direction of the motor shaft 21. Since the motor shaft 21 rotates forward to drive the friction plate 50 to clamp the brake disc 201, when the second end 322 rotates from the second parking position 02 to the first parking position 01, along the tangent direction of the engagement between the pawl 34 and the ratchet teeth 212, the movement direction of the pawl 34 is the same as the movement direction of each ratchet tooth 212 of the ratchet wheel 211 when the motor shaft 21 rotates forward. This facilitates the pawl 34 to be inserted between two adjacent ratchet teeth 212 and abut against one ratchet tooth 212 to limit the reverse rotation of the ratchet wheel 211. When the second end 322 rotates from the first parking position 01 to the second parking position 02, along the tangent direction of the engagement between the pawl 34 and the ratchet teeth 212, the movement direction of the pawl 34 is opposite to the movement direction of each ratchet tooth 212 of the ratchet wheel 211 when the motor shaft 21 rotates forward, which facilitates the pawl 34 to withdraw from the gap between two adjacent ratchet teeth 212 to release the ratchet teeth 212 of the ratchet wheel 211.

[0087] In one embodiment, the pawl 34 includes an engagement surface 341, and the engagement surface 341 is used to fit with the ratchet teeth 212 of the ratchet wheel 211 when the second end 322 stops at the first parking position 01 to limit the reverse rotation of the ratchet wheel 211 and the motor shaft 21.

[0088] In one embodiment, the central axis of the motor shaft 21 and the central axis of the rotating shaft 31 are arranged on the same side of the central vertical line of the engagement surface 341.

[0089] Please refer to Figure 7 , Figure 7 which schematically shows a partial structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0090] In this embodiment, since the engagement surface 341 of the pawl 34 is used to fit with the ratchet teeth 212 of the ratchet wheel 211, the central vertical line L of the engagement surface 341 of the pawl 34 is the pressure direction when the pawl 34 and the ratchet wheel 211 are in single-sided engagement, that is, the direction of the pressure formed by the ratchet teeth 212 of the ratchet wheel 211 on the pawl 34. If the central axis of the motor shaft 21 and the central axis of the rotating shaft 31 are arranged on both sides of the central vertical line L of the engagement surface 341, the moment direction formed by the pressure of the ratchet wheel 211 on the pawl 34 is the same as the direction of the second end 322 rotating around the rotating shaft 31 to the second parking position 02. That is, the pressure formed by the ratchet teeth 212 of the ratchet wheel 211 on the pawl 34 creates a movement tendency for the pawl 34 to rotate towards the second parking position 02 and withdraw from the first parking position 01. When the pressure of the ratchet teeth 212 of the ratchet wheel 211 on the pawl 34 is relatively large, it may cause the second end 322 of the connecting rod 32 to rotate around the rotating shaft 31 and return to the second parking position 02, resulting in the failure of the parking function of the parking mechanism 30.

[0091] Therefore, by aligning the central axis of the motor shaft 21 and the central axis of the rotating shaft 31 on the same side of the central vertical line L of the meshing surface 341, the torque generated by the pressure exerted by the ratchet teeth 212 of the ratchet wheel 211 on the pawl 34 tends to move the second end 322 of the connecting rod 32 toward the first parking position 01. Regardless of the pressure exerted by the ratchet teeth 212 of the ratchet wheel 211 on the pawl 34, the second end 322 will not rotate toward the second parking position 02. This prevents the torque exerted on the pawl 34 from driving the connecting rod 32 toward the second parking position 02, thereby disengaging the single-phase meshing between the pawl 34 and the ratchet wheel 211.

[0092] In one embodiment, the meshing surface 341 faces the rotating shaft 31 along the arrangement direction of the motor shaft 21 and the rotating shaft 31. In this embodiment, the pawl 34 includes another side surface opposite to the meshing surface 341, and the other surface is an inclined surface. The orientation of the meshing surface 341 in which the pawl 34 is in contact with the ratchet teeth 212 of the ratchet 211 is limited so that the orientation of the other side surface of the pawl 34 is the direction in which the motor shaft 21 is reversed. During the re-clamping process of the electronic mechanical brake device 100, the ratchet teeth 212 of the ratchet 211 abut against the other side surface of the pawl 34 away from the rotating shaft 31, and the ratchet teeth 212 are able to push the pawl 34, thereby ensuring that the ratchet 211 reliably rotates forward along with the motor shaft 21 and realizes the re-clamping function.

[0093] In one embodiment, the parking mechanism 30 includes a spring, and the pawl 34 is rotatably or slidably connected to the second end 322. The spring abuts between the connecting rod 32 and the pawl 34 and is used to drive the pawl 34 to rotate or slide toward the ratchet wheel 211. In this embodiment, the spring abuts the pawl 34 to rotate or slide relative to the second end 322, facilitating the re-clamping of the electromechanical brake device 100 by the ratchet teeth 212 of the ratchet wheel 211, thereby compressing the spring and causing the pawl 34 to retract toward the second end 322. The ratchet wheel 211 can continue to rotate forward to achieve the re-clamping function.

[0094] During this process, the driving member 33 and the connecting rod 32 remain relatively stationary, and the parking mechanism 30 only needs to perform a small internal movement to achieve the re-clamping function of the electromechanical brake device 100. The overall movement range of the parking mechanism 30 is small, which can extend its service life.

[0095] An embodiment, the pawl 34 is rotatably connected to the second end 322 and is located between the second end 322 and the rotating shaft 31. The spring is a reed 351, and the reed 351 is used to push the pawl 34 to rotate towards the ratchet wheel 211. In this embodiment, one end of the pawl 34 is rotatably connected to the second end 322, and the pawl 34 extends towards the first end 321 along the direction of arrangement of the second end 322 and the first end 321. That is, along the direction of arrangement of the second end 322 and the first end 321, the length of the pawl 34 coincides with that of the connecting rod 32, which can reduce the overall size of the parking mechanism 30. And the spring provided as the reed 351 can abut against the middle section of the connecting rod 32 and push the pawl 34 to rotate towards the ratchet wheel 211.

[0096] An embodiment, the connecting rod 32 includes a receiving groove 323. Along the arrangement direction of the second end 322 and the first end 321, the receiving groove 323 is located between the second end 322 and the rotating shaft 31. The length dimension of the receiving groove 323 is greater than the length dimension of the pawl 34 and less than the sum of the length dimensions of the pawl 34 and the reed 351. Along the direction perpendicular to the arrangement direction of the second end 322 and the first end 321, the notch of the receiving groove 323 faces the ratchet wheel 211. The receiving groove 323 is used to receive the pawl 34 and the reed 351, and along the arrangement direction of the second end 322 and the first end 321, the reed 351 and the pawl 34 at least partially overlap. Thus, the connecting rod 32 can be provided with the receiving groove 323 to accommodate the reed 351 and a structure for accommodating part of the pawl 34 when the pawl 34 is pushed back by the ratchet teeth 212 of the ratchet wheel 211. The overall volume of the parking mechanism 30 is small, which is beneficial to the miniaturization of the electromechanical braking device 100.

[0097] An embodiment, along the arrangement direction of the second end 322 and the first end 321, the receiving groove 323 includes opposite first groove wall 3231 and second groove wall 3232. The first groove wall 3231 is arranged between the first end 321 and the second groove wall 3232. The reed 351 is fixed to the first groove wall 3231, and the pawl 34 is rotatably connected to the second groove wall 3232.

[0098] Please refer to Figure 8 , Figure 8 which schematically shows a partial structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0099] In this embodiment, the pawl 34 and the reed 351 are respectively installed on opposite two groove walls of the receiving groove 323. Along the arrangement direction of the second end 322 and the first end 321, the pawl 34 and the reed 351 extend towards each other along the length direction of the connecting rod 32, which can reasonably utilize the internal space of the receiving groove 323 and form an effect that the thrust of the reed 351 gradually increases during the retraction process of the pawl 34, ensuring the reliable reset of the pawl 34.

[0100] An embodiment, the connecting rod 32 includes a connected first section 324 and a second section 325. The first section 324 is located between the rotating shaft 31 and the first end 321, and the second section 325 is located between the rotating shaft 31 and the second end 322. The first section 324 and the second section 325 intersect, and the opening of the angle between the first section 324 and the second section 325 faces away from the motor shaft 21.

[0101] Please refer to Figure 9 , Figure 9 which schematically shows a partial structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0102] In this embodiment, along the arrangement direction of the second end 322 and the first end 321, on both sides of the rotating shaft 31, the extending paths of the connecting rod 32 bend towards the motor shaft 21, which can shorten the distance between the driving member 33 and the motor shaft 21, reduce the overall volume of the parking mechanism 30, and is beneficial to the miniaturization of the electromechanical braking device 100.

[0103] An embodiment, the connecting rod 32 includes a third section 326. The second end 322 is connected to the second section 325 through the third section 326. The third section 326 intersects with the second section 325, and the opening of the angle between the third section 326 and the second section 325 faces the motor shaft 21. That is, the second end 322 is located on the side of the third section 326 away from the second section 325.

[0104] In this embodiment, the connecting rod 32 is further bent between the rotating shaft 31 and the second end 322, so that an angle with an opening facing the motor shaft 21 is formed between the second section 325 and the third section 326. The distances between the second section 325 and the third section 326 and the motor shaft 21 are controlled, and further, the radial distance between the pawl 34 and the ratchet wheel 211 along the motor shaft 21 is shortened. Along the circumferential direction of the rotating shaft 31, the distance between the first stopping position 01 and the second stopping position 02 of the second end 322 is smaller, thereby reducing the rotation angle of the connecting rod 32 around the rotating shaft 31. Thus, the overall volume of the parking mechanism 30 is further reduced, which is beneficial to the miniaturization of the electromechanical braking device 100.

[0105] An embodiment, along the direction perpendicular to the arrangement direction of the second end 322 and the first end 321, the outer peripheral surface radius of the ratchet wheel 211 is greater than the distance between the center axis of the second end 322 and the motor shaft 21, and the outer peripheral surface radius of the ratchet wheel 211 is also greater than the distance between the center axis of the rotating shaft 31 and the center axis of the motor shaft 21. That is, along the direction perpendicular to the arrangement direction of the second end 322 and the first end 321, the connecting rod 32 bends around the outer peripheral surface of the ratchet wheel 211 in the extending path, so that the rotating shaft 31 and the second end 322 are respectively close to the ratchet wheel 211, thereby reducing the overall volume of the parking mechanism 30, which is beneficial to the miniaturization of the electromechanical braking device 100.

[0106] In one embodiment, the pawl 34 is rotatably connected to the second end 322 and is located on a side of the second end 322 away from the rotating shaft 31 . The spring is a coil spring 352 , which is used to drive the pawl 34 to rotate toward the ratchet wheel 211 .

[0107] See Figure 10 , Figure 10 A partial structural diagram of an electromechanical braking device 100 provided in one embodiment of the present application is shown.

[0108] In this embodiment, the pawl 34 extends from the second end 322 in a direction away from the first end 321 along the length of the connecting rod 32 and is rotatably connected to the second end 322. A spring configured as a coil spring 352 can be located at the rotatable connection between the pawl 34 and the second end 322 to drive the pawl 34 to rotate toward the ratchet wheel 211.

[0109] On the other hand, in this embodiment, the connecting rod 32 extends in a straight line from its second end 322 to the rotating shaft 31. The pawl 34 forms an angle with the connecting rod 32, with the opening of the angle facing toward the motor shaft 21. In other words, in this embodiment, the pawl 34 is bent relative to the connecting rod 32, forming a structure similar to the third section 326 of the aforementioned embodiment of the leaf spring 351. This similarly controls the spacing between the pawl 34, the connecting rod 32, and the motor shaft 21, and similarly shortens the radial spacing between the pawl 34 and the ratchet 211 along the motor shaft 21. Along the circumference of the rotating shaft 31, the spacing between the first parking position 01 and the second parking position 02 of the second end 322 is also smaller, similarly reducing the rotation angle of the connecting rod 32 about the rotating shaft 31. This further reduces the overall volume of the parking mechanism 30, facilitating miniaturization of the electronic mechanical brake device 100.

[0110] In one embodiment, the driving member 33 includes a parking motor 331, which is configured to drive the first end 321 of the connecting rod 32 to rotate about the rotating shaft 31. In one embodiment, the parking motor 331 is a linear motor. The stator 3311 of the parking motor 331 is fixed to the housing of the electromechanical brake device 100, and the mover 3312 of the parking motor 331 is configured to slide relative to the stator 3311 and drive the first end 321 to rotate about the rotating shaft 31.

[0111] See Figure 11 , Figure 11 A partial structural diagram of an electromechanical braking device 100 provided in one embodiment of the present application is shown.

[0112] In this embodiment, the driving member 33 is a parking motor 331, which is a linear motor. The mover 3312 of the parking motor 331 slides relative to the stator 3311 of the parking motor 331, driving the first end 321 to rotate about the rotating shaft 31, thereby driving the pawl 34 through the second end 322.

[0113] An embodiment, one of the mover 3312 of the parking motor 331 and the first end 321 includes a sliding pin 3313, and the other of the mover 3312 of the parking motor 331 and the first end 321 includes a sliding groove 3314. The sliding pin 3313 is configured to extend into the sliding groove 3314 and slide therein. The length direction of the sliding groove 3314 intersects with the sliding direction of the mover 3312. In Figure 11 the embodiment of, the first end 321 includes the sliding pin 3313, and the mover 3312 includes the sliding groove 3314.

[0114] In this embodiment, since both the mover 3312 of the parking motor 331 and the link 32 are rigid bodies, the movement locus of the first end 321 of the link 32 during the process of the mover 3312 of the parking motor 331 driving the first end 321 to slide is a straight line. Through the cooperation of the sliding groove 3314 and the sliding pin 3313, the freedom degree in the radial direction of the motor shaft 21 of the braking motor 20 between the mover 3312 of the parking motor 331 and the link 32 can be released, and the effect that the first end 321 rotates around the motor shaft 21 during the process of sliding along with the mover 3312 of the parking motor 331 can be achieved.

[0115] An embodiment, the parking motor 331 is a rotary motor. The stator of the parking motor 331 is fixed to the housing of the electromechanical braking device 100, and the rotor of the parking motor 331 is configured to be drivingly connected to the link 32 through a lead screw nut 334 and drive the first end 321 to rotate around the rotating shaft 31 through the link 32.

[0116] Please refer to Figure 12 , Figure 12 which schematically shows a partial structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0117] In this embodiment, the parking motor 331 is in the form of a rotary motor and drives the first end 321 to rotate around the rotating shaft 31 through the lead screw nut 334. Among them, the lead screw nut 334 of the parking mechanism 30 is similar in principle to the lead screw nut 60 for driving the friction plate 50 in the above-mentioned electromechanical braking device 100. In the parking mechanism 30, the lead screw or the nut in the lead screw nut 334 is configured to rotate synchronously with the rotor of the parking motor 331, and the nut or the lead screw in the lead screw nut 334 is configured to slide along the central axis direction of the parking motor 331 and drive the first end 321 to rotate around the rotating shaft 31. The rotary type parking motor 331 has a relatively low cost and is convenient to control.

[0118] An embodiment, similar to the related solution of the above embodiment where the parking motor 331 is a linear motor, when the parking motor 331 is a rotary motor, the lead screw nut 334 and the first end 321 also cooperate in motion by means of the sliding pin 3313 and the sliding groove 3314.

[0119] An embodiment, the driving member 33 includes an electromagnet 332 and a slider 333. The electromagnet 332 is fixed to the housing of the electromechanical braking device 100, and the slider 333 is slidably connected to the housing of the electromechanical braking device 100. The electromagnet 332 is used to drive the slider 333 to slide and drive the first end 321 to rotate around the rotating shaft 31.

[0120] Please refer to Figure 13 , Figure 13 which schematically shows a partial structural view of the electromechanical braking device 100 provided by an embodiment of the present application.

[0121] In this embodiment, the driving member 33 is an electromagnet 332 and a slider 333. By switching the on and off states of the electromagnet 332, the slider 333 is driven to drive the first end 321 to approach or move away from the electromagnet 332, thereby realizing the operation of driving the pawl 34 through the connecting rod 32. The movement track of the slider 333 can be a curved shape to adapt to the rotation of the first end 321 around the motor shaft 21.

[0122] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the protection scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. An electro-mechanical braking device, characterized in that, The electromechanical brake device includes a brake motor and a parking mechanism, wherein the brake motor outputs a braking force through a motor shaft, and the parking mechanism includes: a rotating shaft, wherein the rotating shaft and the motor shaft are spaced apart along the radial direction of the motor shaft, and the central axis of the rotating shaft is parallel to the central axis of the motor shaft; a connecting rod, the connecting rod comprising a first end and a second end opposite to each other, a middle section of the connecting rod being used for rotationally connecting to the rotating shaft, the first end and the second end being respectively arranged on both sides of the middle section along the radial direction of the rotating shaft; a driving member, the driving member being configured to be transmission-connected to the first end, the driving member being configured to drive the second end to rotate about the rotating shaft via the first end, and the second end being configured to stop at a first stop position or a second stop position; A ratchet, the ratchet being sleeved on the outer peripheral surface of the motor shaft; A pawl is elastically connected to the second end. When the second end is parked at the first parking position, the pawl is engaged with the ratchet teeth of the ratchet wheel on one side along the circumference of the motor shaft. When the second end is parked at the second parking position, the pawl releases the ratchet teeth of the ratchet wheel.

2. The electromechanical braking device according to claim 1, characterized in that, The pawl includes an engagement surface, and the engagement surface is used to engage with the ratchet teeth of the ratchet wheel when the second end is parked at the first parking position, wherein: The central axis of the motor shaft and the central axis of the rotating shaft are arranged on the same side of a central vertical line of the meshing surface.

3. The electromechanical braking device according to claim 1 or 2, characterized in that The brake motor outputs a braking force by driving the motor shaft to rotate, wherein: The pawl is engaged with the ratchet teeth of the ratchet wheel on one side to limit the motor shaft from rotating in the opposite direction of outputting the braking force; The rotation direction of the second end rotating from the first parking position to the second parking position is the same as the rotation direction of the braking force output by the motor shaft; The sliding range of the pawl relative to the second end is greater than the tooth height of the ratchet teeth of the ratchet wheel.

4. The electromechanical braking device according to any one of claims 1-3, characterized in that, The parking mechanism includes a spring, the pawl is rotationally connected or slidingly connected to the second end, and the spring abuts between the connecting rod and the pawl and is used to drive the pawl to rotate or slide toward the ratchet wheel.

5. The electromechanical braking device according to claim 4, wherein, The pawl is rotatably connected to the second end and is located between the second end and the rotating shaft. The spring is a leaf spring, which is used to push the pawl to rotate toward the ratchet wheel.

6. The electromechanical braking device according to claim 5, characterized in that, The connecting rod includes a receiving groove, which is located between the second end and the rotating shaft along the arrangement direction of the second end and the first end, and the notch of the receiving groove is perpendicular to the arrangement direction of the second end and the first end toward the ratchet, and the receiving groove is used to accommodate the pawl and the reed.

7. The electromechanical braking device according to claim 6, characterized in that, The accommodating groove includes a first groove wall and a second groove wall opposite to each other along the arrangement direction of the second end and the first end, the first groove wall is arranged between the first end and the second groove wall, the spring is fixed to the first groove wall, and the pawl is rotatably connected to the second groove wall.

8. The electromechanical braking device according to claim 4, characterized in that, The pawl is rotatably connected to the second end and is located on a side of the second end away from the rotating shaft. The spring is a coil spring, and the coil spring is used to drive the pawl to rotate toward the ratchet wheel.

9. The electromechanical braking device according to any one of claims 1-8, characterized in that, The connecting rod includes a first section and a second section connected to each other. The first section is located between the rotating shaft and the first end, and the second section is located between the rotating shaft and the second end. The first section and the second section intersect, and the opening of the angle between the first section and the second section faces away from the motor shaft.

10. The electromechanical braking device according to claim 9, characterized in that, The connecting rod includes a third section. The second end is connected to the second section through the third section. The third section intersects with the second section, and the opening of the angle between the third section and the second section faces the motor shaft.

11. The electromechanical braking device according to claim 10, characterized in that, Along the direction perpendicular to the arrangement direction of the second end and the first end, the radius of the outer peripheral surface of the ratchet is greater than the distance between the second end and the central axis of the motor shaft, and greater than the distance between the central axis of the rotating shaft and the central axis of the motor shaft.

12. The electromechanical braking device according to any one of claims 1-11, characterized in that, The driving member includes a parking motor, which is a linear motor. The stator of the parking motor is fixed to the housing of the electromechanical braking device, and the mover of the parking motor is used to slide relative to the stator and drive the first end to rotate around the rotating shaft through the connecting rod.

13. The electromechanical braking device according to claim 12, wherein, One of the mover of the parking motor and the first end includes a sliding pin, and the other of the mover of the parking motor and the first end includes a sliding groove. The sliding pin is used to extend into the sliding groove and slide therein, and the length direction of the sliding groove intersects with the sliding direction of the mover.

14. The electromechanical braking device according to any one of claims 1-11, characterized in that, The driving member includes a parking motor, which is a rotary motor. The stator of the parking motor is fixed to the housing of the electromechanical braking device, and the rotor of the parking motor is used to drive the connecting rod through a lead screw-nut transmission connection and drive the first end to rotate around the rotating shaft through the connecting rod.

15. A vehicle, characterized in that, The vehicle includes a wheel and the electromechanical braking device according to any one of claims 1-14. The electromechanical braking device is fixed to the vehicle frame, and the electromechanical braking device is used to brake the brake disc of the wheel.

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