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, a motor controller, a transmission gear assembly and a brake pad, the braking motor, the motor controller and the transmission gear assembly are arranged in the different cavities respectively, and the motor controller is used for controlling a motor shaft of the braking motor to rotate and driving the brake pad to brake through the transmission gear assembly. The motor controller and the transmission gear assembly are arranged on the same side of a stator of the brake motor in the axial direction of the motor shaft, the motor controller comprises a first circuit board and a second circuit board, the first circuit board and the motor shaft are arranged at intervals, and the second circuit board is arranged between the first circuit board and the stator. The first circuit board and the transmission gear assembly are arranged at intervals in the radial direction of the motor shaft, and the second circuit board, the transmission gear assembly and the motor shaft are arranged at intervals. According to the electronic mechanical braking device, the circuit boards are stacked and arranged in the lateral space of the motor shaft, so that the overall area expenditure is reduced, and the boundary dimension is reduced.

Description

Technical Field

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

[0002] The electromechanical braking device is used to drive the brake pads to brake the brake disc. Limited by the size of the vehicle wheel side space, it is necessary to compress the volume of the electromechanical braking device to avoid interference between the electromechanical braking device and the vehicle steering system or suspension system. Summary of the Invention

[0003] This application provides an electromechanical braking device and a vehicle. The electromechanical braking device stacks and arranges circuit boards by using the lateral space of the motor shaft, thereby reducing the overall area overhead and compressing the external dimension of the electromechanical braking device.

[0004] In a first aspect, this application provides an electromechanical braking device, which includes a braking motor, a motor controller, a transmission gear assembly, and brake pads. The braking motor, the motor controller, and the transmission gear assembly are respectively arranged in different cavities of the electromechanical braking device. The motor controller is used to control the rotation of the motor shaft of the braking motor, and the motor shaft is used to drive the brake pads to brake through the transmission gear assembly. Along the axial direction of the motor shaft, the motor controller and the transmission gear assembly are arranged on the same side of the stator of the braking motor. The motor controller includes a first circuit board and a second circuit board. The first circuit board is arranged at an interval from the motor shaft, and the second circuit board is arranged between the first circuit board and the stator. Along the radial direction of the motor shaft, the first circuit board is arranged at an interval from the transmission gear assembly, and the second circuit board is arranged at an interval from the transmission gear assembly and the motor shaft.

[0005] The housing of the electromechanical braking device provided in this application includes a plurality of cavities, and the braking motor, the motor controller, and the transmission gear assembly are distributed in different cavities. Among them, the cavity of the motor controller and the cavity of the transmission gear assembly are located on the same side of the cavity of the braking motor along the axial direction of the motor shaft, and the cavity of the motor controller and the cavity of the transmission gear assembly are also arranged at an interval along the radial direction of the motor shaft.

[0006] The motor controller includes a first circuit board and a second circuit board, and the first circuit board and the second circuit board are stacked and arranged in the cavity of the motor controller. The first circuit board is arranged at an interval from the motor shaft along the axial direction of the motor shaft, and the second circuit board is arranged between the first circuit board and the stator of the braking motor along the axial direction of the motor shaft. The first circuit board is used to avoid the transmission gear assembly, and the second circuit board is used to avoid the transmission gear assembly and the motor shaft, so that the motor shaft and the transmission gear assembly can be meshed and driven.

[0007] The electro-mechanical braking device provided by the present application arranges the motor controller in the lateral space of the motor shaft away from the transmission gear assembly, reduces the overall area of the motor controller through the stacked circuit boards, rationally utilizes the lateral space of the motor shaft, makes the internal structure of the electro-mechanical braking device more compact, and achieves the effect of compressing the overall external dimension of the electro-mechanical braking device.

[0008] In one implementation, the electro-mechanical braking device includes a housing and a cover plate. The housing and the cover plate enclose to form a receiving cavity for receiving the motor controller and the transmission gear assembly. The housing is used to fix a spacer, and the spacer is used to divide the receiving cavity into a cavity for the motor controller and a cavity for the transmission gear assembly. Along the axial direction of the motor shaft, the stator, the second circuit board, the first circuit board, and the cover plate are arranged at intervals in sequence. One section of the motor shaft is used to extend into the cavity of the transmission gear assembly and is used for driving connection with the transmission gear assembly.

[0009] In this implementation, the electro-mechanical braking device forms a receiving cavity through the housing and the cover plate to receive the motor controller and the transmission gear assembly, and divides the cavity of the motor controller and the cavity of the transmission gear assembly through the spacer in the housing. The motor shaft of the braking motor extends into the cavity of the transmission gear assembly to engage and drive with the transmission gear assembly. The spacer is used to block the grease or lubricating oil in the cavity of the transmission gear assembly from flowing to the side of the motor controller.

[0010] In one implementation, the spacer includes a flange. Along the axial direction of the motor shaft, the flange is fixed to the receiving cavity and extends towards the cover plate. The middle part of the flange is used to be fixed to the gap between the first circuit board and the motor shaft. Along the radial direction of the motor shaft, the upper part of the flange is used to be fixed to the gap between the first circuit board and the transmission gear assembly, and the lower part of the flange is used to be fixed to the gap between the second circuit board and the motor shaft.

[0011] In this implementation, there is a gap between the motor shaft and the cover plate along the axial direction of the motor shaft. The first circuit board extends into the gap between the motor shaft and the cover plate to obtain a larger area. Thus, a difference is formed between the planar shape of the first circuit board and the planar shape of the second circuit board. By setting the upper and lower parts of the flange to different shapes along the axial direction of the motor shaft, the upper and lower parts of the flange can be respectively matched with the first circuit board and the second circuit board, so as to divide the receiving cavity into a cavity for the motor controller and a cavity for the transmission gear assembly.

[0012] In one implementation, the upper part of the flange includes an oil baffle. Along the axial direction of the motor shaft, the oil baffle is fixed to the side of the flange facing the cover plate. Along the radial direction of the motor shaft, the oil baffle is in a groove shape, and the direction of the groove opening of the oil baffle faces the transmission gear assembly.

[0013] In this implementation, there is a gap between the motor shaft and the first circuit board along the axial direction of the motor shaft. The oil baffle is used to extend into the gap between the motor shaft and the first circuit board to separate the cavity of the motor controller and the cavity of the transmission gear assembly. The oil baffle also extends towards the cover plate and forms part of the structure of the upper flange. The groove shape of the oil baffle is used to space the first circuit board and the gear of the transmission gear assembly.

[0014] An implementation, the electromechanical braking device includes a signal terminal, and the signal terminal is used to be electrically connected to the first circuit board and the second circuit board respectively. Wherein the signal terminal is fixed on the outer surface of the side wall of the housing, and the first circuit board, the transmission gear assembly and the signal terminal are arranged at intervals in sequence along the radial direction of the motor shaft.

[0015] In this implementation, the first circuit board and the signal terminal are arranged on both sides of the transmission gear assembly along the radial direction of the motor shaft. The spacing distance between the motor controller and the signal terminal is relatively large, which can avoid electromagnetic interference between the motor controller and the signal terminal and ensure the normal operation of the motor controller and the signal terminal respectively.

[0016] An implementation, the bottom wall of the accommodating cavity is used to fix the first pin assembly and the second pin assembly. Both the first pin assembly and the second pin assembly extend along the axial direction of the motor shaft. The first pin assembly is used to conduct the first circuit board and the signal terminal, and the second pin assembly is used to conduct the second circuit board and the signal terminal. Wherein along the direction perpendicular to the arrangement direction of the first circuit board and the signal terminal, the first pin assembly and the second pin assembly are arranged on both sides of the motor shaft. Along the radial direction of the motor shaft, the first pin assembly is arranged at intervals with the second circuit board.

[0017] In this implementation, the signal terminal can be respectively conducted to the first pin assembly and the second pin assembly through the circuit fixed on the housing, and the first circuit board and the second circuit board are respectively conducted through the first pin assembly and the second pin assembly. The signal traces between the first circuit board and the second circuit board are isolated from each other, which is convenient to ensure the respective functions of the first circuit board and the second circuit board. The first pin assembly and the second pin assembly are fixed on the bottom wall of the accommodating cavity and close to the second circuit board. The first pin assembly extends upward from the area on the side of the second circuit board and connects to the first circuit board, which can avoid the first pin assembly from overlapping and short-circuiting with the second circuit board.

[0018] An implementation, the second circuit board is used to fix a plurality of bus capacitors. Along the axial direction of the motor shaft, the plurality of bus capacitors are located on the side of the second circuit board facing the first circuit board. The height of the bus capacitors is greater than the distance between the first circuit board and the second circuit board. Wherein along the radial direction of the motor shaft, the plurality of bus capacitors, the second pin assembly and the signal terminal are arranged in sequence, and the plurality of bus capacitors are arranged at intervals with the first circuit board.

[0019] In this implementation manner, by arranging the bus capacitors and the first circuit board at intervals in the radial direction of the motor shaft, the axial distance between the first circuit board and the second circuit board along the motor shaft is further compressed, reducing the axial dimension of the motor controller along the motor shaft and making the internal structure of the electromechanical braking device more compact.

[0020] An implementation manner where the material of the housing is insulating, and the housing, signal terminal, first pin assembly, and second pin assembly are integrally formed.

[0021] In this implementation manner, the signal terminal, first pin assembly, second pin assembly, and the traces for separate conduction are all made of metal materials. The above components made of metal materials can be embedded in a housing made of insulating material and integrally injection-molded with the housing. The structure of the electromechanical braking device is more compact and convenient for assembly.

[0022] An implementation manner where the end of the motor shaft facing the first circuit board is used to fix a magnetic ring. Along the axial direction of the motor shaft, the magnetic ring extends into the cavity of the motor controller. The first circuit board is used to fix the sensing chip of a position sensor, and the projection of the magnetic ring on the first circuit board partially overlaps with the sensing chip.

[0023] In this implementation manner, since the first circuit board is arranged at intervals along the axial direction of the motor shaft, the sensing chip of the position sensor can be integrated on the first circuit board to monitor the rotation speed of the magnetic ring driven by the motor shaft, thereby enabling the motor controller to detect the rotation speed of the braking motor. The motor controller can form a closed-loop control for the braking motor, improving the reliability of the electromechanical braking device of the present application.

[0024] An implementation manner where the first circuit board includes a plurality of control signal jacks for plugging in the first pin assembly, and the first circuit board is used to transmit control signals through the first pin assembly and the plug-in terminals.

[0025] An implementation manner where the second circuit board includes a plurality of drive signal jacks for plugging in the second pin assembly, and the second circuit board is used to receive external drive instructions through the second pin assembly.

[0026] An implementation manner where the second circuit board includes three-phase busbar jacks into which the three-phase busbars of the braking motor are inserted. Along the axial direction of the motor shaft, the three-phase busbar jacks penetrate the second circuit board, and the length of the three-phase busbars is greater than the distance between the second circuit board and the stator; along the circumferential direction of the motor shaft, the three-phase busbar jacks are arranged at intervals with the bus capacitors, and the three jacks in the three-phase busbar jacks are arranged at intervals in turn.

[0027] In this implementation, the second circuit board is closer to the stator of the braking motor along the axial direction of the motor shaft. The three-phase copper busbars of the braking motor are used to plug into the second circuit board and receive the driving signals from the motor controller. The three-phase copper busbars are closer to the bus capacitor along the circumferential direction of the motor shaft, and the three copper busbars in the three-phase copper busbars are arranged at intervals along the circumferential direction of the motor shaft, which can shorten the transmission path between the three-phase copper busbars and the bus capacitor, rationally utilize the planar space of the second circuit board, make the layout of the second circuit board more compact, and compress the radial dimension of the electromechanical braking device provided in this application along the motor shaft.

[0028] In one implementation, the housing and the cover plate are connected by snap fasteners, and the gap between the housing and the cover plate along the axial direction of the motor shaft is used to fill sealant.

[0029] In this implementation, the connection structure between the housing and the cover plate eliminates the need for separate fixing parts, the connection structure is relatively simple and conducive to the miniaturization of the housing. The sealant is used to seal the accommodation cavity to form a reliable protection for the motor controller and the transmission gear assembly.

[0030] In one implementation, the electromechanical braking device includes a bottom plate. The bottom plate and the housing are an integral structure.

[0031] In one implementation, the electromechanical braking device includes a bottom plate. The bottom plate and the housing are connected by snap fasteners, and the gap between the bottom plate and the housing along the axial direction of the motor shaft is used to fill sealant.

[0032] In the above two implementations, the bottom plate and the side plate in the housing can be an integral structure or can be prepared separately. When the bottom plate and the side plate are prepared separately, the connection structure between the bottom plate and the side plate can also adopt the form of snap fasteners to save volume, and the sealant is used to enhance the sealing protection.

[0033] In one implementation, the electromechanical braking device includes a caliper. The caliper is used to accommodate the lead screw nut. The caliper is fixedly connected to the bottom plate. The transmission gear assembly is used to drive the brake pads through the lead screw nut. Along the axial direction of the motor shaft, the caliper is located on the side of the housing facing the stator. Along the radial direction of the motor shaft, the lead screw nut and the stator are arranged at intervals.

[0034] In this implementation, the transmission gear assembly drives the brake pads to brake through the lead screw nut. Along the axial direction of the motor shaft, the caliper and the braking motor are arranged on the same side of the housing, which can compress the size of the electromechanical braking device, make the structure of the electromechanical braking device more compact, and is conducive to miniaturization.

[0035] In one implementation, the bottom plate includes an axially protruding structure. The axially protruding structure is used to protrude along the axial direction of the motor shaft towards the direction away from the cover plate. The inner cavity of the axially protruding structure is used to accommodate the stator and the rotor of the braking motor.

[0036] In one implementation, the caliper includes a motor accommodating chamber, and the motor accommodating chamber is used to accommodate a stator and a rotor of a brake motor.

[0037] In the above two implementation methods, the electronic mechanical braking device can form a cavity for accommodating the brake motor through the axial protrusion structure of the base plate or through the caliper. The two implementation methods can respectively ensure the relative position of the brake motor and the housing, and allow the motor shaft to extend into the cavity of the transmission gear assembly to output braking force.

[0038] In one implementation, the transmission gear assembly includes an output shaft, which is used to pass through the base plate along the axial direction of the motor shaft and extend into the interior of the caliper to transmit and connect the lead screw nut, and the output shaft is used to be fixed to the inner ring of a bearing, and along the axial direction of the motor shaft, a part of the outer ring of a bearing is used to be fixed to the base plate, and another part of the outer ring of a bearing is used to be fixed to the caliper.

[0039] In this implementation, the base plate and the caliper cooperate with each other to jointly fix the bearing for supporting the output shaft of the transmission gear assembly, which can reduce the wall thickness of the base plate or the caliper along the axial direction of the motor shaft and further reduce the size of the electronic mechanical brake device provided in this application.

[0040] In a second aspect, the present application provides a vehicle, the vehicle including wheels and an electronic mechanical brake device provided by any of the above implementations, the electronic mechanical brake device being fixed to a vehicle frame, and the electronic mechanical brake device being used to brake a brake disc of a wheel. The vehicle provided in the second aspect of the present application has a larger wheel side space because the above electronic mechanical brake device is used, leaving more space for the suspension to obtain a larger steering angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A schematic diagram of the structure of a vehicle at a wheel provided by an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the framework of an electromechanical braking device provided by an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the framework of an electromechanical braking device provided by an embodiment of the present application;

[0045] Figure 4Partial structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0046] Figure 5 Exploded structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0047] Figure 6 Cross-sectional structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0048] Figure 7 Structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0049] Figure 8 Exploded structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0050] Figure 9 Cross-sectional structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0051] Figure 10 Planar structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0052] Figure 11 Planar structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0053] Figure 12 Planar structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0054] Figure 13 Structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0055] Figure 14 Structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0056] Figure 15 Structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0057] Figure 16 Exploded structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0058] Figure 17 Exploded structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0059] Figure 18 Planar structural schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0060] Figure 19 The sectional structure schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0061] Figure 20 The sectional structure schematic diagram of an electromechanical braking device provided by an embodiment of the present application;

[0062] Figure 21 The sectional structure schematic diagram of an electromechanical braking device provided by an embodiment of the present application. Specific embodiments

[0063] 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0064] The present application provides an electromechanical braking device. The electromechanical braking device includes a braking motor, a motor controller, a transmission gear assembly, and a brake pad. The braking motor, the motor controller, and the transmission gear assembly are respectively arranged in different cavities of the electromechanical braking device. The motor controller is used to control the rotation of the motor shaft of the braking motor, and the motor shaft is used to drive the brake pad to brake through the transmission gear assembly. Among them, along the axial direction of the motor shaft, the motor controller and the transmission gear assembly are arranged on the same side of the stator of the braking motor. The motor controller includes a first circuit board and a second circuit board. The first circuit board is arranged at intervals with the motor shaft, and the second circuit board is arranged between the first circuit board and the stator. Along the radial direction of the motor shaft, the first circuit board is arranged at intervals with the transmission gear assembly, and the second circuit board is arranged at intervals with the transmission gear assembly and the motor shaft. The electromechanical braking device provided by the present application utilizes the lateral space of the motor shaft away from the transmission gear assembly to arrange the motor controller, and reduces the overall area of the motor controller through the stacked circuit boards, making the internal structure of the electromechanical braking device more compact and reducing the overall external dimension.

[0065] The present application provides a vehicle. The vehicle includes wheels and the electromechanical braking device provided synchronously by the present application. 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. Because the vehicle provided by the present application adopts the above-mentioned electromechanical braking device, the wheel side space of the vehicle is larger, leaving more space for the suspension and steering to obtain a larger steering angle.

[0066] Please refer to Figure 1 、 Figure 2 and Figure 3 where Figure 1Schematically shows the structural diagram of a vehicle provided by an embodiment of the present application at wheel 200; Figure 2 Schematically shows the frame diagram of the electromechanical braking device 100 provided by an embodiment of the present application; Figure 3 Schematically shows the frame diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0067] 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.

[0068] The electromechanical braking device 100 provided by the present application includes a braking motor 20, a motor controller 30, a transmission gear assembly 40, and a brake pad 50. The motor controller 30 is used to control the braking motor 20 to output a braking force. The transmission gear assembly 40 is used to receive the braking force and drive the brake pad 50 to brake.

[0069] In one embodiment, the braking motor 20 includes a motor shaft 21, a stator 22, and a rotor 23. The stator 22 is coaxially sleeved around the periphery of the rotor 23. The motor shaft 21 is fixedly connected to the rotor 23. The stator 22 is used to receive a driving signal to generate an alternating magnetic field, thereby driving the rotor 23 and the motor shaft 21 to rotate synchronously to output a braking force.

[0070] The motor controller 30 is used to be electrically connected to the braking motor 20, and the motor controller 30 is used to receive an external driving instruction to control the braking motor 20 to output a braking force. The transmission gear assembly 40 is used to be drivingly connected to the motor shaft 21 of the braking motor 20 and the brake pad 50. The braking motor 20 is used to drive the brake pad 50 to move towards the brake disc 201 through the transmission gear assembly 40, so that the brake pad 50 contacts the brake disc 201 to form a frictional force, thereby restricting the rotation of the wheel 200 to brake the vehicle.

[0071] In one embodiment, two brake pads 50 are arranged on both sides of the brake disc 201, and the braking motor 20 is driven by the motor controller 30 to drive the two brake pads 50 to slide towards the brake disc 201 respectively to brake the brake disc 201.

[0072] In one embodiment, the electromechanical braking device 100 includes a lead screw nut 61. The lead screw or nut in the lead screw nut 61 is used to receive the driving rotation of the transmission gear assembly 40, and the nut or lead screw in the lead screw nut 61 is used to drive the brake pads 50 to slide towards the brake disc 201.

[0073] In one embodiment, the electromechanical braking device 100 provided in the present application further includes a housing 10 and a caliper 60. The housing 10 is used to accommodate the motor controller 30 and the transmission gear assembly 40. The caliper 60 is used to accommodate the lead screw nut 61. The housing 10 and the caliper 60 are fixedly connected. The transmission gear assembly 40 is in transmission connection with the lead screw nut 61. In one embodiment, the housing 10 is used to accommodate and fix the stator 22 of the braking motor 20. In one embodiment, the caliper 60 is used to accommodate and fix the stator 22 of the braking motor 20.

[0074] In one embodiment, the electromechanical braking device 100 further includes a caliper bracket 101. The caliper bracket 101 is fixed to the vehicle frame and is slidably connected to the caliper 60. The caliper bracket 101 is also used to slidably connect two brake pads 50. During the braking process of the vehicle in the present application, the power output by the motor shaft 21 of the braking motor 20 is sequentially transmitted to the two brake pads 50 through the transmission gear assembly 40 and the lead screw nut 61, so as to drive the brake pads 50 to slide towards the brake disc 201 from both sides to brake the wheel 200.

[0075] The electromechanical braking device 100 provided in the present application includes a plurality of cavities. The braking motor 20, the motor controller 30 and the transmission gear assembly 40 are respectively arranged in different cavities of the electromechanical braking device 100. Along the axial direction of the motor shaft 21, the motor controller 30 and the transmission gear assembly 40 are arranged on the same side of the stator 22 in the braking motor 20, and along the radial direction of the motor shaft 21, the motor controller 30 and the transmission gear assembly 40 are arranged at intervals.

[0076] Please refer to Figure 4 、 Figure 5 and Figure 6 , where Figure 4 shows a partial structural schematic diagram of the electromechanical braking device 100 provided in one embodiment of the present application; Figure 5 shows an exploded structural schematic diagram of the electromechanical braking device 100 provided in one embodiment of the present application; Figure 6 shows a cross-sectional structural schematic diagram of the electromechanical braking device 100 provided in one embodiment of the present application.

[0077] The electromechanical braking device 100 includes a receiving cavity 11. The braking motor 20, the motor controller 30, and the transmission gear assembly 40 are located within the receiving cavity 11. Specifically, the receiving cavity 11 includes a first cavity 111, a second cavity 112, and a third cavity 113. Along the axial direction of the motor shaft 21, the first cavity 111 is arranged on one side of the second cavity 112 and the third cavity 113. Along the radial direction of the motor shaft 21, the second cavity 112 and the third cavity 113 are arranged at intervals. The first cavity 111 is used to accommodate a stator 22, a rotor 23 of the braking motor 20, and a section of the motor shaft 21. The second cavity 112 is used to accommodate the motor controller 30. The third cavity 113 is used to accommodate the transmission gear assembly 40 and another section of the motor shaft 21. That is, along the axial direction of the motor shaft 21, a part of the motor shaft 21 extends into the third cavity 113 and meshes with the gears of the transmission gear assembly 40 for transmission.

[0078] The electromechanical braking device 100 includes a cover plate 14. The cover plate 14 is fixed to the housing 10 and encloses to form the receiving cavity 11. The housing 10 includes a bottom plate 12 and side plates 13. Along the axial direction of the motor shaft 21, the cover plate 14 and the bottom plate 12 are arranged at intervals. The cover plate 14 is fixedly connected to the side plates 13, and the cover plate 14 is connected to the bottom plate 12 through the side plates 13. The cover plate 14 and the bottom plate 12 respectively include a plurality of positioning holes, and each positioning hole is used to fix a bearing respectively, and each bearing is used to support the transmission shaft of the transmission gear assembly 40 and the motor shaft 21. In the illustrated embodiment, the bottom plate 12 includes an axially protruding structure, and the axially protruding structure is used to protrude in a direction away from the cover plate 14 along the axial direction of the motor shaft 21. The inner cavity of the axially protruding structure is used to form the first cavity 111 to accommodate the stator 22 and the rotor 23 of the braking motor 20.

[0079] In one embodiment, the axially protruding structure can be a separate structure. The axially protruding structure is fixedly connected to the bottom plate 12 and detachable, that is, the axially protruding structure is separately manufactured and assembled with the bottom plate 12 to form the structure of the housing 10.

[0080] In one embodiment, the caliper 60 is fixedly connected to the bottom plate 12, and the caliper 60 is located on the side of the housing 10 facing the stator 22 along the axial direction of the motor shaft 21. Along the radial direction of the motor shaft 21, the lead screw nut 61 and the stator 22 are arranged at intervals. That is, along the axial direction of the motor shaft 21, the caliper 60 and the braking motor 20 are arranged on the same side of the housing 10 to compress the size of the electromechanical braking device 100, so that the structure of the electromechanical braking device 100 is more compact and conducive to miniaturization.

[0081] An embodiment, the caliper 60 includes a motor accommodation cavity for accommodating the stator 22 and the rotor 23 of the brake motor 20. Similar to the embodiment where the bottom plate 12 includes an axially protruding structure, the electromechanical braking device 100 forms a first cavity 111 for accommodating the brake motor 20 through the caliper 60, which can also ensure the relative position of the brake motor 20 and the housing 10, and enables the motor shaft 21 to extend into the second cavity 112 of the transmission gear assembly 40 to output braking force.

[0082] For the electromechanical braking device 100 provided in this application, the motor controller 30 includes a first circuit board 31 and a second circuit board 32. Both the first circuit board 31 and the second circuit board 32 are fixed inside the housing 10, specifically located in the second cavity 112. The first circuit board 31 and the second circuit board 32 are arranged at intervals along the axial direction of the motor shaft 21. Along the axial direction of the motor shaft 21, the first circuit board 31 is arranged at intervals with the motor shaft 21, and the second circuit board 32 is arranged between the first circuit board 31 and the stator 22 of the brake motor 20. Along the radial direction of the motor shaft 21, the second circuit board 32 is arranged at intervals with the motor shaft 21.

[0083] The motor controller 30 and the transmission gear assembly 40 are arranged at intervals along the radial direction of the motor shaft 21. In the embodiment of this application, the first circuit board 31 and the second circuit board 32 are also arranged at intervals with the transmission gear assembly 40 along the radial direction of the motor shaft 21 respectively. Thus, along the radial direction of the motor shaft 21, the first circuit board 31 is arranged at intervals with the transmission gear assembly 40, and the second circuit board 32 is arranged at intervals with the transmission gear assembly 40 and the motor shaft 21. The first circuit board 31 is used to avoid the transmission gear assembly 40, and the second circuit board 32 is used to avoid the transmission gear assembly 40 and the motor shaft 21, so as to enable the motor shaft 21 to mesh and drive with the transmission gear assembly 40.

[0084] The electromechanical braking device 100 provided in this application drives the transmission gear assembly 40 through the brake motor 20 to output braking force. The motor shaft 21 meshes with the gear of the transmission gear assembly 40. Along the radial direction of the motor shaft 21, the transmission gear assembly 40 is arranged on one side of the motor shaft 21. The electromechanical braking device 100 provided in this application utilizes the lateral space of the motor shaft 21 away from the transmission gear assembly 40 to arrange the motor controller 30, and reduces the overall area of the motor controller 30 through the stacked first circuit board 31 and second circuit board 32. The first circuit board 31 and the second circuit board 32 can be respectively equipped with different circuit devices to cooperate to realize various functions of the motor controller 30. The electromechanical braking device 100 provided in this application makes reasonable use of the lateral space of the motor shaft 21, its internal structure is more compact, and the overall external dimension of the electromechanical braking device 100 is compressed.

[0085] An embodiment, the accommodation cavity 11 is used to accommodate the motor controller 30 and the transmission gear assembly 40. The housing 10 is used to fix the spacer 70, and the spacer 70 is used to divide the accommodation cavity 11 into a cavity for the motor controller 30 and a cavity for the transmission gear assembly 40. Along the axial direction of the motor shaft 21, the stator 22, the second circuit board 32, the first circuit board 31, and the cover plate 14 are arranged at intervals in sequence. One section of the motor shaft 21 is used to extend into the cavity of the transmission gear assembly 40 and is used for driving connection with the transmission gear assembly 40.

[0086] Please refer to Figures 7 - 10 , wherein Figure 7 shows a schematic structural diagram of an electro-mechanical braking device 100 provided by an embodiment of the present application; Figure 8 shows an exploded structural diagram of an electro-mechanical braking device 100 provided by an embodiment of the present application; Figure 9 shows a cross-sectional structural diagram of an electro-mechanical braking device 100 provided by an embodiment of the present application; Figure 10 shows a plan structural diagram of an electro-mechanical braking device 100 provided by an embodiment of the present application.

[0087] In this embodiment, the spacer 70 is used to divide the cavity of the motor controller 30 and the cavity of the transmission gear assembly 40. That is, the spacer 70 is used to divide the second cavity 112 and the third cavity 113. The spacer 70 is used to block the grease or lubricating oil in the cavity of the transmission gear assembly 40 from flowing to the side of the motor controller 30.

[0088] An embodiment, the spacer 70 includes a flange 71. Along the axial direction of the motor shaft 21, the flange 71 is fixed to the accommodation cavity 11 and extends towards the cover plate 14. The middle part of the flange 71 is used to be fixed to the gap between the first circuit board 31 and the motor shaft 21. Along the radial direction of the motor shaft 21, the upper part of the flange 71 is used to be fixed to the gap between the first circuit board 31 and the transmission gear assembly 40, and the lower part of the flange 71 is used to be fixed to the gap between the second circuit board 32 and the motor shaft 21.

[0089] In this embodiment, there is a gap between the motor shaft 21 and the cover plate 14 along the axial direction of the motor shaft 21. The first circuit board 31 extends into the gap between the motor shaft 21 and the cover plate 14 to obtain a larger area. That is, along the axial direction of the motor shaft 21, the first circuit board 31 houses the orthographic projection of the motor shaft 21. The first circuit board 31 and the motor shaft 21 are respectively located in the second cavity 112 and the third cavity 113, and part of the space of the second cavity 112 and part of the space of the third cavity 113 are arranged in a stacked manner along the axial direction of the motor shaft 21.

[0090] Therefore, the middle part of the spacer 70 needs to be axially fixed to the gap between the first circuit board 31 and the motor shaft 21 along the axial direction of the motor shaft 21, so as to space the second cavity 112 and the third cavity 113 arranged in layers. The upper part of the spacer 70 is used to space the first circuit board 31 and the transmission gear assembly 40, and the lower part of the spacer 70 is used to space the second circuit board 32 and the motor shaft 21, and to space the second circuit board 32 and the transmission gear assembly 40.

[0091] In the electromechanical braking device 100 provided by the present application, there are differences in the planar shapes of the first circuit board 31 and the second circuit board 32 arranged in layers. By setting the upper and lower parts of the flange 71 to different shapes along the axial direction of the motor shaft 21, the upper and lower parts of the flange 71 can be made to match the planar shapes of the first circuit board 31 and the second circuit board 32 respectively, so as to divide the accommodation cavity 11 into the cavity of the motor controller 30 and the cavity of the transmission gear assembly 40, and the middle part of the flange 71 is used to divide the partial area where the second cavity 112 and the third cavity 113 are arranged in layers.

[0092] In one embodiment, the upper part of the flange 71 includes an oil baffle 711. Along the axial direction of the motor shaft 21, the oil baffle 711 is fixed to the side of the flange 71 facing the cover plate 14. Along the radial direction of the motor shaft 21, the oil baffle 711 is in a groove shape, and the direction of the groove opening of the oil baffle 711 faces the transmission gear assembly 40.

[0093] Please refer to Figure 11 and Figure 12 , where Figure 11 shows a schematic plan view of the electromechanical braking device 100 provided by an embodiment of the present application; Figure 12 shows a schematic plan view of the electromechanical braking device 100 provided by an embodiment of the present application.

[0094] In this embodiment, the oil baffle 711 is used to at least form the upper structure of the flange 71. In the illustrated embodiment, the oil baffle 711 is also used to form the structure of the middle part of the flange 71. The oil baffle 711 is fixedly connected to the lower structure of the flange 71 in a detachable manner, and the oil baffle 711 can simplify the structure of the flange 71 and facilitate the overall processing of the flange 71.

[0095] When the oil baffle 711 is also used to form the structure of the middle part of the flange 71, there is a gap between the motor shaft 21 and the first circuit board 31 along the axial direction of the motor shaft 21, and the oil baffle 711 is used to extend into the gap between the motor shaft 21 and the first circuit board 31 to divide the cavity of the motor controller 30 and the cavity of the transmission gear assembly 40. The oil baffle 711 also extends in the direction of the cover plate 14 and forms a part of the structure of the upper part of the flange 71. The groove shape of the oil baffle 711 is used to space the first circuit board 31 and the gears of the transmission gear assembly 40.

[0096] An embodiment, the flange 71 and the housing 10 are of an integral structure.

[0097] An embodiment, except for the oil baffle 711, the remaining part of the flange 71 and the housing 10 are of an integral structure.

[0098] In the above two embodiments, the flange 71 is wholly or partly of an integral structure with the housing 10, and the connectors or connection structures required for the housing 10 to fix the flange 71 can be omitted, which is convenient for compressing the volume of the housing 10 and beneficial to the miniaturization of the electromechanical braking device 100.

[0099] An embodiment, the second circuit board 32 is used to fix a plurality of bus capacitors 33. Along the axial direction of the motor shaft 21, a plurality of bus capacitors 33 are located on the side of the second circuit board 32 facing the first circuit board 31, and the height of the bus capacitors 33 is greater than the distance between the first circuit board 31 and the second circuit board 32. Among them, along the radial direction of the motor shaft 21, the plurality of bus capacitors 33 are arranged at intervals with the first circuit board 31.

[0100] Please refer to Figure 13 and Figure 14 , in which Figure 13 schematically shows the structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application; Figure 14 schematically shows the structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0101] In this embodiment, the size of the bus capacitors 33 along the axial direction of the motor shaft 21 is relatively high. If a plurality of bus capacitors 33 are arranged by using the axial gap between the first circuit board 31 and the second circuit board 32, the distance between the first circuit board 31 and the second circuit board 32 along the axial direction of the motor shaft 21 will be increased, thereby increasing the size of the motor controller 30 along the axial direction of the motor shaft 21, which may lead to an increase in the volume of the housing 10 and is not conducive to the miniaturization of the electromechanical braking device 100. By arranging the bus capacitors 33 and the first circuit board 31 at intervals along the radial direction of the motor shaft 21, the plurality of bus capacitors 33 fixed to the second circuit board 32 can pass through the first circuit board 31, thereby compressing the distance between the first circuit board 31 and the second circuit board 32 along the axial direction of the motor shaft 21, reducing the size of the motor controller 30 along the axial direction of the motor shaft 21, and making the internal structure of the electromechanical braking device 100 more compact.

[0102] An embodiment, a plurality of bus capacitors 33 can be fixed to the first circuit board 31 and located on the side of the first circuit board 31 facing the second circuit board 32. Along the radial direction of the motor shaft 21, the plurality of bus capacitors 33 are arranged at intervals from the second circuit board 32. That is, the plurality of bus capacitors 33 can pass through the second circuit board 32 from the first circuit board 31, and can also compress the size of the motor controller 30 along the motor shaft 21, reducing the overall volume of the electromechanical braking device 100.

[0103] An embodiment, the end of the motor shaft 21 facing the first circuit board 31 is used to fix a magnetic ring. Along the axial direction of the motor shaft 21, the magnetic ring extends into the cavity of the motor controller 30. The first circuit board 31 is used to fix the sensing chip of a position sensor. The projection of the magnetic ring on the first circuit board 31 partially overlaps with the sensing chip.

[0104] In this embodiment, since the first circuit board 31 is arranged at intervals from the motor shaft 21 along the axial direction of the motor shaft 21, the positive projection of the motor shaft 21 is received by the first circuit board 31 along the axial direction of the motor shaft 21. The sensing chip of the position sensor can be integrated on the first circuit board 31, and the sensing chip is at least partially aligned with the magnetic ring along the axial direction of the motor shaft 21, so that the sensing chip can monitor the rotation speed of the magnetic ring driven by the motor shaft 21, thereby realizing the rotation speed detection of the braking motor 20 by the motor controller 30. The motor controller 30 can form a closed-loop control for the braking motor 20, improving the reliability of the electromechanical braking device 100 of the present application.

[0105] In an embodiment, along the axial direction of the motor shaft 21 of the braking motor 20, the motor shaft 21 of the braking motor 20 extends towards the first circuit board 31 and passes through the middle of the spacer 70, so that the magnetic ring and the sensing chip are axially aligned along the motor shaft 21 and form an unobstructed fit, ensuring that the sensing chip can reliably detect the rotation speed of the magnetic ring with the motor shaft 21.

[0106] In an embodiment, the spacer 70 includes an avoidance hole. The avoidance hole penetrates the spacer 70 along the axial direction of the motor shaft 21. Along the axial direction of the motor shaft 21, one end of the motor shaft 21 away from the stator 22 extends into the avoidance hole. The magnetic ring is fixed to one end of the motor shaft 21 away from the stator 22. The sensing chip is fixed to the surface of the first circuit board 31 facing the spacer 70. The projection of the magnetic ring on the first circuit board 31 is located inside the sensing chip.

[0107] In an embodiment, along the axial direction of the motor shaft 21, the magnetic ring is located in the avoidance hole, reducing the space occupied by the magnetic ring, so as to compress the distance between the first circuit board 31 and the spacer 70, making the internal structure of the electromechanical braking device 100 more compact and the size along the axial direction of the motor shaft 21 smaller.

[0108] An embodiment, the electromechanical braking device 100 includes a signal terminal 102, and the signal terminal 102 is used for electrically connecting to the first circuit board 31 and the second circuit board 32 respectively. The signal terminal 102 is fixed on the outer surface of the side wall of the housing 10, and along the radial direction of the motor shaft 21, the first circuit board 31, the transmission gear assembly 40, and the signal terminal 102 are arranged at intervals in sequence.

[0109] Please refer to Figure 15 , wherein Figure 15 schematically shows the structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0110] As Figure 15 shown, along the radial direction of the motor shaft 21, the first circuit board 31 and the signal terminal 102 are arranged on both sides of the transmission gear assembly 40. The size of the transmission gear assembly 40 is relatively large, and the spacing distance between the motor controller 30 and the signal terminal 102 is also increased accordingly, which can avoid electromagnetic interference between the motor controller 30 and the signal terminal 102 and ensure the normal operation of the motor controller 30 and the signal terminal 102 respectively.

[0111] An embodiment, the bottom wall of the accommodation cavity 11 is used for fixing the first pin assembly 81 and the second pin assembly 82. Both the first pin assembly 81 and the second pin assembly 82 extend along the axial direction of the motor shaft 21. The first pin assembly 81 is used for conducting the first circuit board 31 and the signal terminal 102, and the second pin assembly 82 is used for conducting the second circuit board 32 and the signal terminal 102.

[0112] Please refer to Figure 16 , Figure 17 and Figure 18 , wherein Figure 16 schematically shows the exploded structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application; Figure 17 schematically shows the exploded structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application; Figure 18 schematically shows the planar structural diagram of the electromechanical braking device 100 provided by an embodiment of the present application.

[0113] In this embodiment, the first pin assembly 81 and the second pin assembly 82 each include a plurality of pins. Each pin extends from the bottom wall of the receiving cavity 11 along the axial direction of the motor shaft 21 towards the cover plate 14. Among them, along the axial direction of the motor shaft 21, the length of the pins of the first pin assembly 81 is greater than the length of the pins of the second pin assembly 82. The pins of the first pin assembly 81 are used to conduct the first circuit board 31, and the pins of the second pin assembly 82 are used to conduct the second circuit board 32. Thus, the signal terminal 102 can be respectively conducted to the first pin assembly 81 and the second pin assembly 82 through the lines fixed to the housing 10, and the first circuit board 31 and the second circuit board 32 can be respectively conducted through the first pin assembly 81 and the second pin assembly 82. The traces between the first circuit board 31 and the second circuit board 32 are isolated from each other, which is convenient for respectively ensuring the realization of the functions of the first circuit board 31 and the second circuit board 32.

[0114] In one embodiment, along the radial direction of the motor shaft 21, the first pin assembly 81 and the second circuit board 32 are arranged at intervals. The first pin assembly 81 and the second pin assembly 82 are fixed to the bottom wall of the receiving cavity 11 and close to the second circuit board 32. The first pin assembly 81 extends upward from the area on the side of the second circuit board 32 and connects to the first circuit board 31, which can avoid the first pin assembly 81 from overlapping and short-circuiting with the second circuit board 32. That is, the second circuit board 32 includes an avoidance notch for avoiding the first pin assembly 81 and allowing the plurality of pins of the first pin assembly 81 to electrically connect to the first circuit board 31 after passing over the second circuit board 32 along the motor shaft 21.

[0115] In one embodiment, along the direction perpendicular to the arrangement direction of the first circuit board 31 and the signal terminal 102, the first pin assembly 81 and the second pin assembly 82 are arranged on both sides of the motor shaft 21. Among them, the arrangement direction of the first circuit board 31 and the signal terminal 102 is the same as the arrangement direction of the motor shaft 21 and the transmission gear assembly 40, that is, the arrangement direction of the second cavity 112 and the third cavity 113. In the embodiment of the present application, the main structures of the first circuit board 31 and the second circuit board 32 are both located on the side of the motor shaft 21 away from the transmission gear assembly 40, so as to utilize the lateral space of the motor shaft 21 away from the transmission gear assembly 40.

[0116] The first pin assembly 81 and the second pin assembly 82 are arranged on both sides of the motor shaft 21 along the direction perpendicular to the arrangement of the motor controller 30 and the transmission gear assembly 40, which can utilize the space on both sides of the motor shaft 21 in this direction to respectively realize the electrical connection between the first circuit board 31 and the signal terminal 102, and the electrical connection between the second circuit board 32 and the signal terminal 102.

[0117] That is, the first circuit board 31 includes a first connection area for facing the first pin assembly 81 along the axial direction of the motor shaft 21. The first pin assembly 81 is electrically connected to the first circuit board 31 by conducting the first connection area. Correspondingly, the second circuit board 32 includes a second connection area for facing the second pin assembly 82 along the axial direction of the motor shaft 21. The second pin assembly 82 is electrically connected to the second circuit board 32 by conducting the second connection area. Among them, the first connection area and the second connection area are arranged on both sides of the motor shaft 21 along the direction perpendicular to the arrangement direction of the motor controller 30 and the transmission gear assembly 40.

[0118] Such an arrangement can make the components in the accommodation cavity 11 more compactly arranged, and increase the distance between the first pin assembly 81 and the second pin assembly 82, avoiding signal interference between the first pin assembly 81 and the second pin assembly 82.

[0119] In one embodiment, the first circuit board 31 includes a plurality of control signal jacks for plugging the first pin assembly 81. The first circuit board 31 is used to transmit control signals through the first pin assembly 81 and the plugging terminals. In one embodiment, the plurality of control signal jacks are located within the first connection area of the first circuit board 31.

[0120] In one embodiment, the second circuit board 32 includes a plurality of drive signal jacks for plugging the second pin assembly 82. The second circuit board 32 is used to receive external drive instructions through the second pin assembly 82. In one embodiment, the plurality of drive signal jacks are located within the second connection area of the second circuit board 32.

[0121] In the above two embodiments, the first circuit board 31 can be mainly used to carry the devices for realizing the control function in the motor controller 30, and is electrically connected to the signal terminal 102 through the control signal jacks and the first pin assembly 81. The wiring between the first pin assembly 81 and the signal terminal 102 is mainly used to transmit the control signals of the motor controller 30. The second circuit board 32 can be mainly used to carry the devices for realizing the drive function in the motor controller 30, and is electrically connected to the signal terminal 102 through the drive signal jacks and the second pin assembly 82. The wiring between the second pin assembly 82 and the signal terminal 102 is mainly used to transmit the drive signals of the motor controller 30.

[0122] Thus, the control signals and drive signals between the motor controller 30 and the signal terminal 102 can be routed separately, avoiding electromagnetic interference between the control signals and drive signals, and ensuring the reliable operation of various functions of the motor controller 30.

[0123] An embodiment, a plurality of bus capacitors 33 are fixed to the second circuit board 32, and the plurality of bus capacitors 33, the second pin assembly 82, and the signal terminal 102 are arranged in sequence. The plurality of bus capacitors 33 are used to receive external instructions through the second pin assembly 82 and the signal terminal 102. Arranging the plurality of bus capacitors 33 in a region close to the second pin assembly 82 can shorten the signal transmission distance of the plurality of bus capacitors 33.

[0124] An embodiment, the second circuit board 32 includes three-phase copper row jacks, and the three-phase copper row of the braking motor 20 is used to extend into the three-phase copper row jacks. Wherein, along the axial direction of the motor shaft 21, the three-phase copper row jacks penetrate through the second circuit board 32, and the length of the three-phase copper row is greater than the distance between the second circuit board 32 and the stator 22; along the circumferential direction of the motor shaft 21, the three-phase copper row jacks and the bus capacitors 33 are arranged at intervals, and the three jacks in the three-phase copper row jacks are arranged at intervals in sequence.

[0125] In this embodiment, the second circuit board 32 is closer to the stator 22 of the braking motor 20 along the axial direction of the motor shaft 21, and the three-phase copper row of the braking motor 20 is used to plug into the second circuit board 32 and receive the driving signal of the motor controller 30. The three-phase copper row is close to the bus capacitors 33 along the circumferential direction of the motor shaft 21, and the three copper rows in the three-phase copper row are arranged at intervals along the circumferential direction of the motor shaft 21, which can shorten the transmission path between the three-phase copper row and the bus capacitors 33, rationally utilize the plane space of the second circuit board 32, make the layout of the second circuit board 32 more compact, and compress the size of the electro-mechanical braking device 100 provided in the present application along the radial direction of the motor shaft 21.

[0126] An embodiment, the material of the housing 10 is insulating, and the housing 10, the signal terminal 102, the first pin assembly 81, and the second pin assembly 82 are integrally formed. In this embodiment, the signal terminal 102, the first pin assembly 81, the second pin assembly 82, and the traces for respectively conducting are all made of metal materials. The above-mentioned components made of metal materials can be embedded in the housing 10 made of insulating material and integrally injection-molded with the housing 10. The structure of the electro-mechanical braking device 100 is more compact and convenient for assembly.

[0127] An embodiment, the housing 10 completely covers the trace between the signal terminal 102 and the first pin assembly 81, so as to form reliable protection for the trace between the signal terminal 102 and the first pin assembly 81. An embodiment, the trace between the signal terminal 102 and the first pin assembly 81 is fixed in the side plate 13 on one side of the housing 10.

[0128] In one embodiment, the housing 10 completely covers the wiring between the signal terminal 102 and the second pin assembly 82, thereby providing reliable protection for the wiring between the signal terminal 102 and the second pin assembly 82. In one embodiment, the wiring between the signal terminal 102 and the second pin assembly 82 is fixed within the side plate 13 on the other side of the housing 10.

[0129] For the above two embodiments, by fixing the wiring between the signal terminal 102 and the first pin assembly 81 and the wiring between the signal terminal 102 and the second pin assembly 82 through the side plates 13 on the opposite sides of the housing 10 respectively, the distance between the wiring between the signal terminal 102 and the first pin assembly 81 and the wiring between the signal terminal 102 and the second pin assembly 82 can be increased, further avoiding electromagnetic interference between the two sets of wiring.

[0130] In one embodiment, the side plate 13 for fixing the wiring between the signal terminal 102 and the first pin assembly 81 and the side plate 13 for fixing the wiring between the signal terminal 102 and the second pin assembly 82 are arranged opposite to each other along the direction perpendicular to the arrangement direction of the motor controller 30 and the transmission gear assembly 40.

[0131] In one embodiment, the housing 10 and the cover plate 14 are connected by a buckle 15, and the gap between the housing 10 and the cover plate 14 along the axial direction of the motor shaft 21 is used to fill the sealant 16.

[0132] Please refer to Figure 19 , in which Figure 19 schematically shows a cross-sectional structural view of the electromechanical braking device 100 provided by one embodiment of the present application.

[0133] As Figure 19 shown, in this embodiment, the housing 10 and the cover plate 14 are fixedly connected by a buckle 15. The buckle 15 is fixed on the side plate 13 or the cover plate 14. The connection structure between the housing 10 and the cover plate 14 omits a separate fixing member, and the connection structure between the housing 10 and the cover plate 14 is relatively simple and conducive to the miniaturization of the housing 10.

[0134] In one embodiment, along the axial direction of the motor shaft 21, there is a gap between the housing 10 and the cover plate 14, and the sealant 16 is used to fill this gap. The sealant 16 can be used to strengthen the firmness of the fixed connection between the housing 10 and the cover plate 14, and the sealant 16 can also be used to seal the accommodation cavity 11, enhancing the reliable protection for the motor controller 30 and the transmission gear assembly 40.

[0135] In one embodiment, the bottom plate 12 and the housing 10 are of an integral structure. Thereby, the connection structure between the bottom plate 12 and the side plate 13 can be omitted, which is conducive to the miniaturization of the housing 10.

[0136] In one embodiment, the bottom plate 12 and the housing 10 are also connected by a buckle 15 , and the gap between the bottom plate 12 and the housing 10 along the axial direction of the motor shaft 21 is filled with a sealant 16 .

[0137] See also Figure 20 ,in Figure 20 A cross-sectional structural diagram of an electromechanical brake device 100 provided in an embodiment of the present application is illustrated.

[0138] like Figure 20 As shown, in this embodiment, the bottom plate 12 and the side plate 13 are also fixedly connected by a buckle 15. The buckle 15 is fixed on the side plate 13 or the bottom plate 12. The connection structure between the bottom plate 12 and the side plate 13 also omits a separate fixing piece, and the connection structure between the bottom plate 12 and the side plate 13 is relatively simple and is conducive to the miniaturization of the housing 10.

[0139] In one embodiment, a gap is left between the bottom plate 12 and the side plate 13 along the axial direction of the motor shaft 21, and the gap is also used to fill the sealant 16. The sealant 16 can be used to strengthen the firmness of the fixed connection between the bottom plate 12 and the side plate 13, and the sealant 16 can also be used to seal the accommodating cavity 11 to enhance the reliable protection of the motor controller 30 and the transmission gear assembly 40.

[0140] In the above two embodiments, the bottom plate 12 and the side plate 13 in the housing 10 can be an integral structure or can be prepared separately. When the bottom plate 12 and the side plate 13 are an integral structure, the bottom plate 12 and the side plate 13 can be made by integral injection molding to simplify the production process of the housing 10.

[0141] In one embodiment, the transmission gear assembly 40 includes an output shaft 41, which is used to pass through the base plate 12 along the axial direction of the motor shaft 21 and extend into the interior of the caliper 60 to transmit and connect the lead screw nut 61. The output shaft 41 is used to be fixed to the inner ring of a bearing 90, and along the axial direction of the motor shaft 21, a part of the outer ring of a bearing 90 is used to be fixed to the base plate 12, and another part of the outer ring of a bearing 90 is used to be fixed to the caliper 60.

[0142] See also Figure 21 ,in Figure 21 A cross-sectional structural diagram of an electromechanical brake device 100 provided in an embodiment of the present application is illustrated.

[0143] In this embodiment, the bearing 90 is used to support the output shaft 41 of the transmission gear assembly 40 to ensure reliable transmission of the braking force between the output shaft 41 and the lead screw nut 61. The output shaft 41 and the lead screw nut 61 are structurally connected through the bottom plate 12 and the caliper 60. The electromechanical braking device 100 provided in the present application cooperates with the bottom plate 12 and the caliper 60 to jointly fix the bearing 90 that supports the output shaft 41 of the transmission gear assembly 40, which can reduce the wall thickness of the bottom plate 12 or the caliper 60 along the axial direction of the motor shaft 21, and further compress the size of the electromechanical braking device 100.

[0144] In an embodiment, the bottom plate 12 and the caliper 60 are of an integral structure, and the electromechanical braking device 100 forms an accommodation cavity 11 by enclosing the bottom plate 12 fixed to the caliper 60, the side plate 13 of the housing 10, and the cover plate 14. In this embodiment, along the axial direction of the motor shaft 21, the surface of the caliper 60 facing the transmission gear assembly 40 is used to be fixedly connected to the side plate 13 of the housing 10 and is connected to the cover plate 14 through the side plate 13. This embodiment further eliminates the structure of a separate bottom plate 12, thereby further compressing the axial size of the electromechanical braking device 100.

[0145] Obviously, those skilled in the art can make various changes and modifications 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 changes and modifications.

Claims

1. An electromechanical braking device, characterized in that, The electro-mechanical braking device includes a braking motor, a motor controller, a transmission gear assembly, and a brake pad. The braking motor, the motor controller, and the transmission gear assembly are respectively arranged in different cavities of the electro-mechanical braking device. The motor controller is used to control the rotation of the motor shaft of the braking motor, and the motor shaft is used to drive the brake pad to brake through the transmission gear assembly, where: Axially along the motor shaft, the motor controller and the transmission gear assembly are arranged on the same side of the stator of the braking motor. The motor controller includes a first circuit board and a second circuit board. The first circuit board is arranged at an interval from the motor shaft, and the second circuit board is arranged between the first circuit board and the stator; Radially along the motor shaft, the first circuit board is arranged at an interval from the transmission gear assembly, and the second circuit board is arranged at an interval from the transmission gear assembly and the motor shaft.

2. The electromechanical braking device according to claim 1, wherein The electro-mechanical braking device includes a housing and a cover plate. The housing and the cover plate enclose to form a receiving cavity for receiving the motor controller and the transmission gear assembly, where: The housing is used to fix a spacer, and the spacer is used to divide the receiving cavity into a cavity for the motor controller and a cavity for the transmission gear assembly; Axially along the motor shaft, the stator, the second circuit board, the first circuit board, and the cover plate are arranged at intervals in sequence. A section of the motor shaft is used to extend into the cavity of the transmission gear assembly and is used for transmission connection with the transmission gear assembly.

3. The electromechanical braking device according to claim 2, characterized in that, The spacer includes a flange, where: Axially along the motor shaft, the flange is fixed to the receiving cavity and extends towards the cover plate. The middle part of the flange is used to be fixed to the gap between the first circuit board and the motor shaft; Radially along the motor shaft, the upper part of the flange is used to be fixed to the gap between the first circuit board and the transmission gear assembly, and the lower part of the flange is used to be fixed to the gap between the second circuit board and the motor shaft.

4. The electromechanical braking device according to claim 3, wherein The upper part of the flange includes an oil baffle, where: Axially along the motor shaft, the oil baffle is fixed to the side of the flange facing the cover plate; Radially along the motor shaft, the oil baffle is in a groove shape, and the direction of the groove opening of the oil baffle faces the transmission gear assembly.

5. The electromechanical braking device according to any one of claims 2-4, characterized in that, The electro-mechanical braking device includes a signal terminal for electrically connecting to the first circuit board and the second circuit board respectively, where: The signal terminal is fixed to the outer surface of the side wall of the housing. Radially along the motor shaft, the first circuit board, the transmission gear assembly, and the signal terminal are arranged at intervals in sequence.

6. The electromechanical braking device according to claim 5, wherein The bottom wall of the receiving cavity is used to fix a first pin assembly and a second pin assembly. Both the first pin assembly and the second pin assembly extend axially along the motor shaft. The first pin assembly is used to conduct the first circuit board and the signal terminal, and the second pin assembly is used to conduct the second circuit board and the signal terminal, where: Along a direction perpendicular to the arrangement direction of the first circuit board and the signal terminals, the first pin assembly and the second pin assembly are arranged on both sides of the motor shaft; Along the radial direction of the motor shaft, the first pin assembly and the second circuit board are arranged at intervals.

7. The electromechanical braking device according to claim 6, characterized in that, The second circuit board is used to fix a plurality of bus capacitors. Along the axial direction of the motor shaft, the plurality of bus capacitors are located on the side of the second circuit board facing the first circuit board. The height of the bus capacitors is greater than the distance between the first circuit board and the second circuit board, where: Along the radial direction of the motor shaft, the plurality of bus capacitors, the second pin assembly and the signal terminals are arranged in sequence, and the plurality of bus capacitors are arranged at intervals from the first circuit board.

8. The electromechanical braking device according to any one of claims 5-7, characterized in that, The material of the housing is insulating, and the housing, the signal terminals, the first pin assembly and the second pin assembly are integrally formed.

9. The electromechanical braking device according to any one of claims 2-8, characterized in that, The end of the motor shaft facing the first circuit board is used to fix a magnetic ring. Along the axial direction of the motor shaft, the magnetic ring extends into the cavity of the motor controller. The first circuit board is used to fix an induction chip of a position sensor, and the projection of the magnetic ring on the first circuit board partially overlaps with the induction chip.

10. The electromechanical braking device according to any one of claims 2-9, characterized in that, The housing and the cover plate are connected by a buckle. Along the axial direction of the motor shaft, the gap between the housing and the cover plate is used to fill sealant.

11. The electromechanical braking device according to any one of claims 2-10, characterized in that, The electromechanical braking device includes a bottom plate, where: The bottom plate and the housing are of an integral structure; or, The bottom plate and the housing are connected by a buckle. Along the axial direction of the motor shaft, the gap between the bottom plate and the housing is used to fill sealant.

12. The electromechanical braking device according to any one of claims 2-11, characterized in that, The electromechanical braking device includes a caliper. The caliper is used to accommodate a lead screw nut. The caliper is fixedly connected to the bottom plate. The transmission gear assembly is used to drive the brake pad through the lead screw nut, where: Along the axial direction of the motor shaft, the caliper is located on the side of the housing facing the stator; Along the radial direction of the motor shaft, the lead screw nut and the stator are arranged at intervals.

13. The electromechanical braking device according to claim 12, characterized in that, The bottom plate includes an axially protruding structure. The axially protruding structure is used to protrude along the axial direction of the motor shaft in a direction away from the cover plate. The inner cavity of the axially protruding structure is used to accommodate the stator and rotor of the braking motor; or, The caliper includes a motor accommodation cavity. The motor accommodation cavity is used to accommodate the stator and rotor of the braking motor.

14. The electromechanical braking device according to claim 12 or 13, characterized in that, The transmission gear assembly includes an output shaft. The output shaft is used to axially pass through the bottom plate along the motor shaft and extend into the caliper to drive-connect the lead screw nut. The output shaft is used to be fixed to the inner ring of a bearing. Along the axial direction of the motor shaft, a part of the outer ring of the bearing is used to be fixed to the bottom plate, and another part of the outer ring of the bearing is used to be fixed to the caliper.

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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