Electromechanical brake device and vehicle

Abstract

The application provides an electromechanical brake device and a vehicle. The electromechanical brake device comprises a brake motor, a transmission gear assembly and a friction plate. A motor shaft of the brake motor is used to drive the friction plate to brake a brake disc of the vehicle through the transmission gear assembly in the radial direction of the brake motor. A housing of the electromechanical brake device comprises a motor housing and a first cover plate. The motor housing and the first cover plate are arranged in sequence in the axial direction of the brake motor. The motor housing is used to form a cavity for accommodating the brake motor, and the first cover plate is used to form a cavity for accommodating the transmission gear assembly together with the motor housing. The motor housing of the electromechanical brake device provided by the application further comprises a part of structure for constituting a housing of the transmission gear assembly. The internal components of the electromechanical brake device are arranged more compactly, which is beneficial to realize miniaturization.

Description

Technical Field

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

[0002] Electromechanical braking devices are used to drive friction pads to brake brake discs. Due to the limited space around the vehicle's wheels, the size of the electromechanical braking device needs to be minimized to avoid interference with the vehicle's wheel rims, steering system, or suspension system. Utility Model Content

[0003] This application provides an electromechanical braking device and a vehicle. The motor housing of the electromechanical braking device also includes a structure for forming the housing of the transmission gear assembly. The internal components of the electromechanical braking device are arranged more compactly, which is beneficial for miniaturization.

[0004] In a first aspect, this application provides an electromechanical braking device, which includes a brake motor, a transmission gear assembly, and friction pads. The motor shaft of the brake motor, along its radial direction, drives the friction pads to brake a vehicle brake disc via the transmission gear assembly. The housing of the electromechanical braking device includes a motor housing and a first cover plate, arranged sequentially along the axial direction of the brake motor. The motor housing forms a cavity to accommodate the brake motor, and the first cover plate, together with the motor housing, forms a cavity to accommodate the transmission gear assembly.

[0005] The electromechanical braking device provided in this application outputs braking force by driving a transmission gear assembly through a brake motor. The motor housing comprises two parts: one part houses the stator and rotor of the brake motor, and the other part mates with a first cover plate to house the transmission gear assembly. This electromechanical braking device utilizes a single motor housing to house both the brake motor and the transmission gear assembly, eliminating the need for separate housings for the brake motor and transmission gear assembly. This also helps to shorten the distance between the brake motor and the transmission gear assembly, resulting in a more compact internal component arrangement and facilitating miniaturization.

[0006] In one implementation, the electromechanical braking device includes a second cover plate, and the motor housing, the first cover plate, and the second cover plate are arranged sequentially along the axial direction of the braking motor. The cavity formed by the second cover plate and the first cover plate is used to accommodate the motor controller of the electromechanical braking device.

[0007] In this implementation, the first cover plate includes another part, which cooperates with the second cover plate to accommodate the motor controller of the electromechanical braking device. That is, the first cover plate is further constructed as an integral structure, and the second cover plate is fixedly connected to the motor housing by being fixed to the first cover plate. This can further shorten the distance between the motor controller and the transmission gear assembly, as well as the distance between the motor controller and the brake motor, facilitating the miniaturization of the electromechanical braking device.

[0008] In one implementation, the motor controller is arranged at intervals with the brake motor along the axial direction and with the transmission gear assembly along the radial direction of the brake motor.

[0009] In one implementation, the first cover plate includes a first receiving groove and a second receiving groove. The first receiving groove is used to receive a motor controller, and the second receiving groove is used to receive a portion of a transmission gear assembly. Along the axial direction of the brake motor, the opening of the first receiving groove faces away from the motor housing, and the opening of the second receiving groove faces towards the motor housing.

[0010] In this implementation, the first cover plate forms a cavity for accommodating the motor controller and a portion of a cavity for accommodating the transmission gear assembly. Because the motor controller and the first bearing are arranged radially apart along the brake motor, the first and second receiving slots are arranged approximately radially along the brake motor and parallel to the arrangement direction of the motor shaft and the input gear. The openings of the first and second receiving slots face opposite directions along the axial direction of the brake motor, facilitating the insertion of the motor controller and the transmission gear assembly from both sides of the first cover plate.

[0011] In one implementation, the first cover plate includes an axial partition. Along the axial direction of the brake motor, the axial partition includes a first plane and a second plane facing away from each other, the first plane forming a portion of the bottom of a first receiving groove, and the second plane forming a portion of the bottom of a second receiving groove.

[0012] In this implementation, the first and second receiving slots overlap along the axial direction of the brake motor. Because the circuit board of the motor controller and the first bearing are arranged radially spaced along the brake motor, and the thickness of the circuit board is small, the input gear of the transmission gear assembly can mesh with the motor shaft using the axial space between the circuit board and the stator, thereby making the arrangement of the motor shaft, circuit board and transmission gear assembly more compact.

[0013] In one implementation, the motor controller includes a circuit board for fixing a position sensor chip. An axial partition includes a first through-hole extending through the partition along the axial direction of the brake motor. The first through-hole partially accommodates a magnetic ring for drive connection to the brake motor shaft. The projection of the magnetic ring onto the circuit board along the axial direction of the brake motor partially overlaps with the sensor chip. A first plane is used to fix an oil-blocking film, which shields the first through-hole.

[0014] In this implementation, the circuit board overlaps with the motor shaft along the axial direction of the brake motor. A position sensor chip is integrated on the circuit board, and together with a magnetic ring on the motor shaft, it can monitor the rotational speed of the motor shaft, thereby enabling the motor controller to detect the speed of the brake motor. The motor controller can then form a closed-loop control of the brake motor, improving the reliability of the electromechanical braking device of this application. The cavity housing the transmission gear assembly is coated with lubricating grease to lubricate the transmission gear assembly and reduce wear. An oil-blocking film prevents lubricating grease from entering the first receiving groove, protecting the motor controller. Along the axial direction of the brake motor, the oil-blocking film is fixed to the axial partition facing the circuit board, allowing the magnetic ring to partially enter the first through-hole, reducing the axial distance between the magnetic ring and the sensing chip, and ensuring reliable detection by the position sensor.

[0015] In one implementation, the axial partition includes a second through hole and a third through hole. The second and third through holes extend through the axial direction of the brake motor, respectively. The second and third through holes are positioned on either side of the first through hole along a direction perpendicular to the arrangement of the motor shaft and the transmission gear assembly. The second through hole avoids the three-phase copper busbar of the electromechanical braking device, which electrically connects the motor controller and the stator of the brake motor. The motor controller sends drive signals to the brake motor via the three-phase copper busbar. The third through hole avoids the pressure sensor transmission line of the electromechanical braking device, which electrically connects the motor controller and a pressure sensor. The pressure sensor detects the pressure exerted by the friction pads on the brake disc.

[0016] In this implementation, the motor controller electrically connects the three-phase copper busbar and the pressure sensor transmission line to respectively drive the brake motor and receive braking force detection. The second and third through holes, positioned perpendicular to the direction of the motor shaft and the output gear arrangement, are located on either side of the first through hole. This increases the spacing between the three-phase copper busbar and the pressure sensor transmission line, reducing mutual interference between the drive signal transmitted by the three-phase copper busbar and the detection signal transmitted by the pressure sensor transmission line.

[0017] In one implementation, the electromechanical braking device includes a fixing adhesive, which is filled between a three-phase copper busbar and a second through hole, or between a pressure sensor transmission line and a third through hole. The fixing adhesive is used to improve the stability of the three-phase copper busbar or pressure sensor transmission line in the housing and to seal the second and third through holes.

[0018] In one implementation, the first cover plate includes a first base plate and a second base plate. Along the direction of the motor shaft and the transmission gear assembly, the first and second base plates are positioned on either side of an axial partition. The first base plate forms another portion of the bottom of a first receiving groove, and the second base plate forms another portion of the bottom of a second receiving groove. Along the axial direction of the brake motor, the stator of the brake motor, the first base plate, the axial partition, and the second base plate are arranged sequentially at intervals.

[0019] In this implementation, a first base plate, together with an axial partition, forms the bottom of a first receiving groove, and a second base plate, together with an axial partition, forms the bottom of a second receiving groove. The first base plate, axial partition, and second base plate are arranged sequentially along the direction of the motor shaft and the input gear. Along the axial direction of the brake motor, the distance between the first base plate and the circuit board is greater than the distance between the axial partition and the circuit board, allowing components with larger axial dimensions in the motor controller to be arranged between the first base plate and the circuit board. Along the axial direction of the brake motor, the thickness of the second base plate is greater than that of the axial partition, facilitating the second base plate's reception and fixation of the various bearings in the transmission gear assembly.

[0020] In one implementation, the first base plate includes a fourth through hole, which is used to avoid the signal terminal of the electromechanical braking device. The fourth through hole extends through the first base plate along the axial direction of the brake motor. One end of the signal terminal is used for electrical connection to a circuit board, and the other end of the signal terminal extends out of the housing of the electromechanical braking device and is electrically connected to an external transmission line.

[0021] In this implementation, the signal terminal is located on one side of the first base plate in the first receiving groove. The distance between the signal terminal and the three-phase copper busbar and the pressure sensor transmission line is larger along the arrangement direction of the motor shaft and the input gear. This can reduce the mutual interference between the external signal transmitted by the signal terminal and the drive signal transmitted by the three-phase copper busbar, as well as between the external signal and the detection signal transmitted by the pressure sensor transmission line.

[0022] In one implementation, along the axial direction of the brake motor, the opening of the first receiving groove includes a first mounting surface, which is used to abut and fix a second cover plate; the second base plate includes an outer surface facing away from the stator, and the distance between the outer surface and the stator is greater than the distance between the first mounting surface and the stator.

[0023] In this implementation, the slot of the first receiving groove along the axial direction of the brake motor is recessed relative to the outer surface of the second base plate, which can reduce the axial height of the second cover plate that is attached to the first mounting surface, thereby reducing the overall axial dimension of the electromechanical braking device.

[0024] In one implementation, the opening of the first receiving groove is recessed to a height equal to the thickness of the second cover plate relative to the outer surface of the second base plate, thereby making the second cover plate and the first cover plate flush with each other along the axial direction of the brake motor, away from the outer surface of the stator.

[0025] In one implementation, the first cover plate includes a radial partition. Along the direction of the arrangement of the motor shaft and the input gear of the transmission gear assembly, the radial partition includes a first sidewall and a second sidewall facing away from each other. The first sidewall is used to form a portion of the groove wall of a first receiving groove, and the second sidewall is used to form a portion of the groove wall of a second receiving groove.

[0026] In this implementation, a radial partition is used to connect the axial partition and the second base plate along the axial direction of the brake motor. The radial partition also separates the first and second receiving slots along the direction of the motor shaft and the transmission gear assembly. The first and second receiving slots partially overlap along the radial direction of the brake motor. The spaces on both sides of the radial partition can respectively accommodate the circuit board, the gears of the transmission gear assembly, or the bearings, thereby making the arrangement of the circuit board and the transmission gear assembly more compact and facilitating the miniaturization of the electromechanical braking device.

[0027] In one implementation, the first sidewall includes a protruding structure extending toward the center of a first receiving groove along the direction of the motor shaft and the transmission gear assembly. The protruding structure is used to form a first bearing receiving groove. Along the axial direction of the brake motor, the opening of the first bearing receiving groove faces the stator and communicates with a second receiving groove. The first bearing receiving groove is used to receive and fix a bearing of the transmission gear assembly.

[0028] In this implementation, a portion of the radial partition extends into the first receiving groove along the direction of the motor shaft and the transmission gear assembly to form a first bearing receiving groove. This compresses the gap between one bearing of the transmission gear assembly and the motor shaft, ensuring reliable meshing and transmission between the input gear and a section of the meshing teeth on the motor shaft. The electromechanical braking device has a smaller dimension along the direction of the motor shaft and the transmission gear assembly, resulting in a more compact arrangement of the motor shaft, circuit board, and transmission gear assembly.

[0029] In one implementation, a first bearing receiving groove is used to receive a first bearing, the first bearing is used to fix the input shaft of the transmission gear assembly, and the input shaft is used to fix the input gear of the transmission gear assembly.

[0030] In one implementation, the circuit board is flush with and spaced apart from the first bearing along the axial direction of the brake motor. Because the radial dimension of the first bearing is small, arranging the circuit board close to the first bearing can shorten the radial distance between the input gear and the motor shaft, making the transmission gear assembly and the motor shaft more compact.

[0031] In one implementation, the circuit board includes a clearance notch facing the first bearing along the arrangement direction of the motor shaft and the transmission gear assembly, and surrounding the periphery of a protrusion structure on the first sidewall.

[0032] In this implementation, the notch on the circuit board is used to avoid the protruding structure on the first sidewall. Along the direction perpendicular to the motor shaft and the arrangement of the input gears, the circuit board includes two side regions. These two side regions are located on either side of the protruding structure. Along the direction perpendicular to the motor shaft and the arrangement of the input gears, the circuit board increases its overall area through these two side regions, which can be used to house the motor controller components and reduce the overall area overhead of the motor controller, thus shortening the external dimensions of the electromechanical braking device along the direction of the motor shaft and the arrangement of the input gears.

[0033] In one implementation, a circuit board is used to fix multiple bus capacitors. Along the axial direction of the brake motor, the multiple bus capacitors are located on the side of the circuit board facing the stator, and the height of the bus capacitors is greater than the distance between the circuit board and the motor shaft. Along the radial direction of the brake motor, the multiple bus capacitors are arranged at intervals with the motor shaft, and at least one bus capacitor is arranged on the side of the motor shaft away from the input gear.

[0034] In this implementation, by arranging the bus capacitors and motor shaft at radial intervals along the brake motor, the space of the motor shaft along the radial direction of the brake motor is rationally utilized, making the spacing between the bus capacitors with larger axial dimensions in the motor controller and the motor shaft, input gear, and intermediate gear smaller, and the arrangement between the motor controller, motor shaft, and transmission gear assembly more compact.

[0035] In one implementation, the transmission gear assembly includes an intermediate gear, which is fixed to the input shaft together with the input gear. The intermediate gear rotates synchronously with the input gear and drives another transmission gear in the transmission gear assembly to rotate, thereby transmitting braking force. Along the axial direction of the brake motor, the intermediate gear is arranged between the first bearing and the input gear. Along the radial direction of the brake motor, the intermediate gear is spaced apart from the axial partitions.

[0036] In this implementation, the intermediate gear along the axial direction of the brake motor is arranged between the first bearing and the input gear. The axial partition is arranged with the intermediate gear along the radial direction of the brake motor by utilizing the axial dimension of the intermediate gear, thereby separating the first receiving slot and the second receiving slot, and making the arrangement of the motor shaft, circuit board and transmission gear assembly more compact.

[0037] In one implementation, the bottom of the second receiving groove includes a third bearing receiving groove for accommodating and fixing the second bearing, which supports a drive shaft of the transmission gear assembly. The third bearing receiving groove is positioned on the side of the first bearing receiving groove away from the motor shaft, along the direction of the motor shaft and the transmission gear assembly. Specifically, along the axial direction of the brake motor, the depth of the first bearing receiving groove is greater than the depth of the third bearing receiving groove. Along the radial direction of the brake motor, the diameter of the first bearing receiving groove is greater than the diameter of the third bearing receiving groove.

[0038] In this implementation, the third bearing receiving groove is arranged on the side of the first bearing receiving groove away from the motor shaft, along the direction of the motor shaft and the transmission gear assembly. The depth and diameter of the third bearing receiving groove are smaller than those of the first bearing receiving groove, and the thickness and diameter of the second bearing are smaller than those of the first bearing, respectively. To match the transmission ratio of the transmission gear assembly, the larger thickness and diameter of the first bearing allow it to withstand higher input shaft speeds. The second bearing supports a lower transmission shaft speed. Reducing the thickness and diameter of the second bearing does not affect the braking force output of the transmission gear assembly and facilitates the lightweighting and miniaturization of the electromechanical braking device.

[0039] In one implementation, the first cover plate includes another radial partition along the axial direction of the brake motor, which serves to connect the axial partition and the first base plate.

[0040] In one implementation, the electromechanical braking device includes a third cover plate for sealing the side of the motor housing away from the first cover plate. The third cover plate, the stator of the braking motor, and the first cover plate are arranged at intervals along the axial direction of the braking motor.

[0041] In this implementation, the motor housing includes a motor receiving slot and a third receiving slot. Along the axial direction of the brake motor, the opening of the motor receiving slot faces away from the first cover plate, while the opening of the third receiving slot faces the first cover plate. Along the axial direction of the brake motor, the third cover plate is fixed to the opening of the motor receiving slot, and the third cover plate is used to close the cavity on the motor housing that houses the brake motor. Along the axial direction of the brake motor, the first cover plate is fixed to the opening of the third receiving slot. The second and third receiving slots together form a cavity that houses the transmission gear assembly.

[0042] In one implementation, the motor housing includes a partition plate arranged along the axial direction of the brake motor on the side of the stator of the brake motor away from the third cover plate, and a section of the motor shaft of the brake motor is used to pass through the partition plate and extend into the cavity of the transmission gear assembly.

[0043] In this implementation, the axial partition of the brake motor includes a third plane and a fourth plane facing away from each other. The third plane forms a portion of the bottom of the third receiving groove, and the fourth plane forms the bottom of the motor receiving groove. The motor shaft passes through the partition and extends into a cavity for accommodating the transmission gear assembly.

[0044] In one implementation, the partition plate includes a second bearing receiving groove, with the groove opening facing the stator along the axial direction of the brake motor. The second bearing receiving groove is used to fix the outer ring of the motor bearing, and the inner ring of the motor bearing is fixed to the middle section of the motor shaft. The bottom of the second bearing receiving groove includes a fifth through hole, which is used to avoid a section of the motor shaft. The diameter of the fifth through hole is larger than the outer diameter of a section of the motor shaft.

[0045] The brake motor is installed into the motor housing through the slot of the motor receiving slot. The motor shaft extends from one side of the motor receiving slot through the fifth through hole at the bottom of the second bearing receiving slot into the third receiving slot. The inner diameter of the fifth through hole is larger than the outer diameter of one section of the motor shaft to ensure proper assembly.

[0046] In one implementation, the outer peripheral surface of a section of the motor shaft includes meshing teeth, which are used to mesh with the input gear of the transmission gear assembly to output braking force along the radial direction of the brake motor.

[0047] In this implementation, by integrating meshing teeth on the outer circumferential surface of the motor shaft, the motor shaft directly meshes with the input gear, eliminating the need for a separate structure for mounting the motor gear on the outer circumferential surface of the motor shaft. This increases the diameter of the motor shaft and facilitates a reduction in the wheelbase between the motor shaft and the input gear, thereby reducing the overall size of the electromechanical braking device while ensuring reliable braking force output from the brake motor.

[0048] In one implementation, the third cover plate includes a fourth bearing receiving groove for accommodating another motor bearing, wherein along the axial direction of the brake motor, a section of meshing teeth of the motor shaft, a motor bearing, a stator, and another motor bearing are arranged in sequence.

[0049] In one implementation, the partition plate includes a fifth bearing receiving groove, the opening of which faces the first cover plate along the axial direction of the brake motor. The fifth bearing receiving groove is used to receive a third bearing, which, along the axial direction of the brake motor, supports the other end of the input shaft away from the first bearing.

[0050] In one implementation, the motor housing includes a third base plate, which is arranged on one side of a central partition along the arrangement direction of the motor shaft and the transmission gear assembly. The third base plate forms another portion of the bottom of a third receiving groove. The third base plate is arranged opposite to the second base plate of the first cover plate along the axial direction of the brake motor.

[0051] In one implementation, the third base plate includes a sixth bearing receiving groove, the opening of which faces the first cover plate along the axial direction of the brake motor. The sixth bearing receiving groove is used to accommodate a fourth bearing, which supports the output shaft of the transmission gear assembly.

[0052] In one implementation, the second base plate includes a side away from the second cover plate along the direction in which the motor shaft and the transmission gear assembly are arranged. The side of the second base plate includes a chamfer for avoiding the structure around the wheel hub to prevent interference between the housing of the electromechanical braking device and the other components at the wheel.

[0053] In one implementation, the electromechanical braking device includes a caliper for housing a lead screw, the caliper being fixedly connected to a motor housing. A transmission gear assembly is used to drive friction plates via the lead screw. Along the axial direction of the brake motor, the caliper is located on the side of the motor housing facing the stator. Along the radial direction of the brake motor, the lead screw and stator are spaced apart.

[0054] Secondly, this application provides a vehicle including wheels and an electromechanical braking device provided in any of the above-described implementations. The electromechanical braking device is fixed to the vehicle frame and is used to brake the brake discs of the wheels. Because the vehicle provided in this second aspect employs the aforementioned electromechanical braking device, it has a larger wheel-side space, providing more space for other vehicle components such as the suspension, allowing the vehicle to achieve a larger steering angle or better shock absorption. Attached Figure Description

[0055] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram of the structure of a vehicle at the wheel location according to one embodiment of this application; Figure 2 A schematic diagram of the frame of an electromechanical braking device provided in one embodiment of this application; Figure 3 A schematic diagram of the frame of an electromechanical braking device provided in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of an electromechanical braking device provided in one embodiment of this application; Figure 5 This is an exploded view of an electromechanical braking device provided in one embodiment of this application; Figure 6This is a cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 7 This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 8 This is an exploded view of an electromechanical braking device provided in one embodiment of this application; Figure 9 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 10 This is a schematic diagram of the structure of a transmission gear assembly provided in one embodiment of this application; Figure 11 This is a cross-sectional structural schematic diagram of a transmission gear assembly provided in one embodiment of this application; Figure 12 This is a schematic diagram of the transmission gear assembly and brake motor provided in one embodiment of this application; Figure 13 This is a partial structural schematic diagram from one side of an embodiment of the electromechanical braking device provided in this application. Figure 14 This is a partial structural schematic diagram from another side view of an embodiment of the electromechanical braking device provided in this application; Figure 15 This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 16 This is a partial structural schematic diagram from one side of an embodiment of the electromechanical braking device provided in this application. Figure 17 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 18 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 19 This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 20 This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 21 This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 22 This is a partially exploded structural diagram of an electromechanical braking device provided in one embodiment of this application; Figure 23This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 24 This is a partial structural schematic diagram from one side of an embodiment of the electromechanical braking device provided in this application. Figure 25 This is a partial structural schematic diagram from another side view of an embodiment of the electromechanical braking device provided in this application; Figure 26 This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 27 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 28 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 29 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 30 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 31 This is a partially exploded structural diagram of an electromechanical braking device provided in one embodiment of this application; Figure 32 A partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 33 This is a partial cross-sectional structural schematic diagram of an electromechanical braking device provided in one embodiment of this application; Figure 34 This is a partial structural schematic diagram of an electromechanical braking device provided in one embodiment of this application. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0058] This application provides an electromechanical braking device, which includes a brake motor, a transmission gear assembly, and friction pads. The motor shaft of the brake motor, along its radial direction, drives the friction pads to brake the vehicle's brake disc via the transmission gear assembly. The housing of the electromechanical braking device includes a motor housing and a first cover plate, arranged sequentially along the axial direction of the brake motor. The motor housing forms a cavity to accommodate the brake motor; the first cover plate, together with the motor housing, forms a cavity to accommodate the transmission gear assembly. The electromechanical braking device provided by this application uses an integrated motor housing to separately accommodate the brake motor and the transmission gear assembly, eliminating the need for separate housings for the brake motor and the transmission gear assembly. This also helps to shorten the distance between the brake motor and the transmission gear assembly, resulting in a more compact internal component arrangement and facilitating miniaturization.

[0059] This application provides a vehicle including wheels and an electromechanical braking device provided concurrently with this application. The electromechanical braking device is fixed to the vehicle frame and is used to brake the brake discs of the wheels. Because the vehicle provided in the second aspect of this application employs the aforementioned electromechanical braking device, it has a larger wheel space, providing more space for other vehicle components such as the suspension, allowing the vehicle to achieve a larger steering angle or better shock absorption.

[0060] Please see Figure 1 , Figure 2 and Figure 3 ,in Figure 1 This illustration shows a structural diagram of a vehicle at wheel 200 according to an embodiment of this application; Figure 2 This illustration shows a schematic diagram of the frame of an electromechanical braking device 100 provided in one embodiment of this application; Figure 3 This illustration shows a schematic diagram of the frame of an electromechanical braking device 100 provided in one embodiment of this application.

[0061] The vehicle provided in this 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 wheel hub of the wheel 200. During vehicle operation, the brake disc 201 rotates synchronously with the wheel hub of the wheel 200. The electromechanical braking device 100 is the electromechanical braking device provided in this embodiment of the application. The electromechanical braking device 100 is fixed to the vehicle frame. The electromechanical braking device 100 contacts the brake disc 201 to generate friction, thereby limiting the rotation of the wheel 200 to brake the vehicle.

[0062] The electromechanical braking device 100 provided in this application includes a brake motor 10, a transmission gear assembly 20, and a friction plate 30. The brake motor 10 is used to output braking force, and the transmission gear assembly 20 is used to drive the brake motor 10 and the friction plate 30. The transmission gear assembly 20 is used to receive the braking force of the brake motor 10 and drive the friction plate 30 to contact the brake disc to achieve braking.

[0063] In one embodiment, the brake motor 10 includes a motor shaft 11, a stator 12, and a rotor 13. The motor shaft 11 is fixedly connected to the rotor 13 and is used to output braking force. The stator 12 is coaxially sleeved around the rotor 13 and is used to receive drive signals and generate an alternating magnetic field, thereby driving the rotor 13 to drive the motor shaft 11 to rotate synchronously to output braking force.

[0064] The motor shaft 11 of the brake motor 10 is used to drive the transmission gear assembly 20. The brake motor 10 is used to drive the friction pad 30 toward the brake disc through the transmission gear assembly 20, so that the friction pad 30 contacts the brake disc to form friction, thereby limiting the rotation of the wheel 200 to brake the vehicle.

[0065] In one embodiment, there are two friction pads 30, arranged sequentially along the axial direction of the wheel 200: brake motor 10, one friction pad 30, brake disc, and the other friction pad 30. The brake motor 10 drives the two friction pads 30 to slide toward the brake disc 201 via the transmission gear assembly 20 to brake the brake disc 201.

[0066] In one embodiment, the electromechanical braking device 100 includes a lead screw 40. A screw or nut in the lead screw 40 receives drive rotation from the transmission gear assembly 20, and the nut or screw in the lead screw 40 drives the friction pad 30 to slide towards the brake disc 201.

[0067] In one embodiment, the electromechanical braking device 100 provided in this application further includes a caliper 50, which is used to fix to the brake motor 10 and to drive the friction pad 30. The caliper 50 is also used to accommodate a lead screw 40. A transmission gear assembly 20 is used to connect with the lead screw 40. During braking, the braking force output by the motor shaft 11 of the brake motor 10 is transmitted to the lead screw 40 via the transmission gear assembly 20. The lead screw 40 drives the caliper 50 to drive the friction pad 30 to contact the brake disc 201 to achieve braking.

[0068] Along the radial direction of the motor shaft 11 of the brake motor 10, the motor shaft 11 is used to drive the friction pad 30 to brake the vehicle brake disc 201 via the transmission gear assembly 20. That is, along the radial direction of the motor shaft 11 of the brake motor 10, the motor shaft 11 and the transmission gear assembly 20 are arranged side by side, and the motor shaft 11 is also used for transmission connection with the transmission gear assembly 20 to output braking force along the radial direction of the motor shaft 11, thereby compressing the axial dimension of the electromechanical braking device 100.

[0069] In one embodiment, the transmission gear assembly 20 is used to adjust the speed and torque of the braking force output by the brake motor 10, and transmits the adjusted braking force to the lead screw 40. Specifically, the transmission gear assembly 20 includes an input gear 211, an intermediate gear 212, and an output gear 213. The input gear 211 is used for transmission connection with the motor shaft 11. The intermediate gear 212 is coaxially fixed with the input gear 211 and is used for meshing transmission with the output gear 213. The output gear 213 is used for transmission connection with the lead screw 40. The transmission gear assembly 20 receives the braking force of the brake motor 10 through the input gear 211, and transmits it to the output gear 213 through the intermediate gear 212, and outputs it towards the lead screw 40. That is, during the braking process of the brake motor 10 in this application, the motor shaft 11 rotates and drives the input gear 211 to rotate, thereby driving the intermediate gear 212 to drive the output gear 213 to rotate, and then driving the lead screw 40 to drive the friction plate 30 to move towards the brake disc 201.

[0070] In one embodiment, along the radial direction of the motor shaft 11, an input gear 211 is arranged side-by-side and meshes with the motor shaft 11, and an intermediate gear 212 is arranged side-by-side and meshes with the output gear 213. Thus, the brake motor 10 can transmit braking force radially along the motor shaft 11, thereby reducing the axial dimension of the electromechanical braking device 100 along the motor shaft 11 and facilitating the miniaturization design of the electromechanical braking device 100.

[0071] In one embodiment, the diameters of the input gear 211 and the intermediate gear 212 are smaller than the diameter of the output gear 213, thereby creating a speed reduction and torque increase effect in the transmission path from the input gear 211 to the output gear 213.

[0072] In one embodiment, the motor shaft 11 of the brake motor 10 is used for meshing transmission with the input gear 211.

[0073] In one embodiment, the motor shaft 11 includes a segment, which will be referred to as the first segment 111 for ease of description. The motor shaft 11 meshes with the input gear 211 through the first segment 111. Exemplarily, the outer peripheral surface of the first segment 111 includes meshing teeth along the radial direction of the motor shaft 11 of the brake motor 10. These meshing teeth are used to mesh with the input gear 211 of the transmission gear assembly 20 to output braking force. In this embodiment, by integrating meshing teeth on the outer peripheral surface of the motor shaft 11, the motor shaft 11 directly meshes with the input gear 211, eliminating the need for a separate installation of the motor gear 21 on the outer peripheral surface of the motor shaft 11. This increases the diameter of the motor shaft 11 and facilitates a reduction in the wheelbase between the motor shaft 11 and the input gear 211, thereby reducing the overall volume of the electromechanical braking device 100 while ensuring reliable output of braking force by the brake motor 10.

[0074] Please refer to the above. Figure 4 , Figure 5 , Figure 6 and Figure 7 ,in Figure 4 This illustration shows a structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 5 This illustration shows an exploded view of an electromechanical braking device 100 provided in one embodiment of this application; Figure 6 This illustration shows a cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 7 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0075] The electromechanical braking device 100 provided in this application includes a housing 60 for accommodating a brake motor 10 and a transmission gear assembly 20. Specifically, the housing 60 includes a motor housing 61 and a cover plate. The motor housing 61 cooperates with the cover plate to accommodate the brake motor 10 and the transmission gear assembly 20. The cover plate includes a first cover plate 62, and the motor housing 61 and the first cover plate 62 are arranged sequentially along the axial direction of the motor shaft 11 of the brake motor 10. The motor housing 61 forms a cavity for accommodating the brake motor 10, and the first cover plate 62, together with the motor housing 61, forms a cavity for accommodating the transmission gear assembly 20.

[0076] For example, the housing 60 includes a first receiving cavity 60a and a second receiving cavity 60b. The first receiving cavity 60a is formed by the motor housing 61, and the second receiving cavity 60b is formed by the motor housing 61 and a first cover plate 62. The first receiving cavity 60a and the second receiving cavity 60b are arranged sequentially along the axial direction of the motor shaft 11. The second receiving cavity 60b extends radially along the motor shaft 11. The first receiving cavity 60a is used to receive the stator 12 and rotor 13 of the brake motor 10. The second receiving cavity 60b is used to receive the input gear 211, intermediate gear 212, and output gear 213 of the transmission gear assembly 20. The motor shaft 11 of the brake motor 10 is partially received in the first receiving cavity 60a and partially extends into the second receiving cavity 60b and meshes with the input gear 211 received in the second receiving cavity 60b. In one embodiment, the first segment 111 of the motor shaft 11 extends into the second receiving cavity 60b and meshes with the input gear 211 housed in the second receiving cavity 60b to output braking force toward the transmission gear assembly 20.

[0077] Alternatively, the motor housing 61 can be understood as including a cylindrical shell 611, a first partition 612, and a first connecting wall 613. Along the axial direction of the motor shaft 11, the cylindrical shell 611, the first partition 612, and the first connecting wall 613 are arranged sequentially. The planar direction of the first partition 612 is parallel to the radial direction of the motor shaft 11. The cylindrical shell 611 forms a first receiving cavity 60a to accommodate the stator 12, rotor 13, and part of the motor shaft 11 of the brake motor 10. The first partition 612 connects with the first connecting wall 613 and encloses it to form a first receiving groove. Along the axial direction of the motor shaft 11, the opening of the first receiving groove faces away from the stator 12. The first section 111 of the motor shaft 11 extends through the first partition 612 into the first receiving groove.

[0078] The first cover plate 62 includes a second partition 621 and a second connecting wall 622. Along the axial direction of the motor shaft 11, the first partition 612, the first connecting wall 613, the second connecting wall 622, and the second partition 621 are arranged sequentially. The planar direction of the second partition 621 is parallel to the radial direction of the motor shaft 11. The second connecting wall 622 is used to connect with the second partition 621 and enclose it to form a second receiving groove. Along the axial direction of the motor shaft 11, the opening of the second receiving groove faces the stator 12. The second connecting wall 622 is also used to connect with the first connecting wall 613 to seal the first receiving groove and the second receiving groove to form a second receiving cavity 60b, so as to accommodate the transmission gear assembly 20. In one embodiment, the first segment 111 of the motor shaft 11 passes through the first partition 612 and extends into the second receiving cavity 60b, meshing with the input gear 211 of the transmission gear assembly 20, thereby enabling the output of braking force toward the transmission gear assembly 20.

[0079] In this application, the motor housing 61 simultaneously serves as the housing cavity for both the brake motor 10 and the base for the housing cavity for the transmission gear assembly 20. The motor housing 61 comprises two parts: one part houses the stator 12 and rotor 13 of the brake motor 10, and the other part mates with the first cover plate 62 to house the transmission gear assembly 20. The electromechanical braking device 100 provided in this application utilizes an integrated motor housing 61 to house both the brake motor 10 and the transmission gear assembly 20, eliminating the need for separate housings 60 for the brake motor 10 and 60 for the transmission gear assembly 20. This also eliminates the need for the connecting flange and fastening structure between the motor housing and the transmission gear assembly housing in the prior art, thereby eliminating the thickness of the interface between the motor housing and the transmission gear assembly housing. This further reduces the axial dimension of the electromechanical braking device 100 along the motor shaft 11, preventing interference with the vehicle's suspension or steering system. Meanwhile, the integrated housing 60 design also helps to shorten the distance between the brake motor 10 and the transmission gear assembly 20, making the internal components of the electromechanical braking device 100 more compact, and can compress the axial and radial dimensions of the electromechanical braking device 100 along the motor shaft 11, which is conducive to miniaturization.

[0080] In summary, the electromechanical braking device 100 of this application can reduce its axial dimension by outputting braking force radially along the motor shaft 11. Furthermore, this application utilizes a first accommodating cavity 60a and a second accommodating cavity 60b adjacent to each other along the motor shaft 11 to accommodate the brake motor 10 and the transmission gear assembly 20, further reducing the axial dimension of the electromechanical braking device 100. Simultaneously, it allows for a compact arrangement of the internal components of the electromechanical braking device 100, further reducing both its axial and radial dimensions. This facilitates miniaturization of the electromechanical braking device 100, better adapting to the narrow wheel rim installation environment of the wheel 200 and preventing interference between the electromechanical braking device 100 and the wheel rim, steering system, or suspension system.

[0081] In one embodiment, the electromechanical braking device 100 provided in this application includes a motor controller 70, which is electrically connected to the brake motor 10 and receives external drive commands to control the brake motor 10 to output braking force.

[0082] In one embodiment, the motor controller 70 includes a circuit board 71 for fixing the drive circuit of the motor controller 70.

[0083] Please refer to the above. Figure 8 and Figure 9 ,in Figure 8This illustration shows an exploded view of an electromechanical braking device 100 provided in one embodiment of this application; Figure 9 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0084] In one embodiment, the housing 60 is also used to accommodate the motor controller 70. Specifically, the electromechanical braking device 100 includes a second cover plate 63, and along the axial direction of the motor shaft 11 of the brake motor 10, the motor housing 61, the first cover plate 62, and the second cover plate 63 are arranged sequentially. The second cover plate 63 is used to enclose the first cover plate 62 to accommodate the motor controller 70. That is, the cavity formed by the second cover plate 63 and the first cover plate 62 is used to accommodate the motor controller 70. Alternatively, it can be understood that the housing 60 also includes a third accommodating cavity 60c, which is formed by the second cover plate 63 and the first cover plate 62, and is used to accommodate the motor controller 70.

[0085] For example, the first cover plate 62 further includes a third partition plate 623 and a third connecting wall 624. Along the axial direction of the motor shaft 11, the first connecting wall 613, the third partition plate 623, the third connecting wall 624, and the second cover plate 63 are arranged sequentially. The planar direction of the third partition plate 623 is parallel to the radial direction of the motor shaft 11. The third connecting wall is used to connect with the second partition plate 621 and to the second cover plate 63. The third partition plate 623 is used to be fixedly connected to the first connecting wall 613, and the third connecting wall 624 is used to connect with the third partition plate 623 and the second cover plate 63 to form a third receiving cavity 60c, so as to accommodate the motor controller 70.

[0086] The first cover plate 62 serves simultaneously as the enclosure structure for the housing of the transmission gear assembly 20 and the base for the housing of the motor controller 70. The first cover plate 62 comprises two parts: one part mates with the motor housing 61 to house the transmission gear assembly 20, and the other part mates with the second cover plate 63 to house the motor controller 70. In this application, the first cover plate 62 is further constructed as an integral structure, and the second cover plate 63 is fixedly connected to the motor housing 61 via a third connecting wall 624 fixed to the first cover plate 62. This further shortens the distance between the motor controller 70 and the transmission gear assembly 20, as well as the distance between the motor controller 70 and the brake motor 10, facilitating the miniaturization of the electromechanical braking device 100.

[0087] In one embodiment, the motor controller 70 is spaced apart from the brake motor 10 along the axial direction of the motor shaft 11 of the brake motor 10, and is also spaced apart from the transmission gear assembly 20 along the radial direction of the brake motor 10. That is, the brake motor 10, transmission gear assembly 20, and motor controller 70 are arranged in a generally "T"-shaped configuration. This allows for a reduction in the axial dimension of the electromechanical braking device 100 along the motor shaft 11, thereby preventing interference between the electromechanical braking device 100 and the suspension or steering system.

[0088] In one embodiment, the second partition 621 is arranged axially along the motor shaft 11 on the side of the third partition 623 opposite to the brake motor 10. The second partition 621 is also arranged radially along the motor shaft 11 and connected to the third partition 623. Furthermore, along the axial direction of the motor shaft 11, the maximum distance between the second partition 621 and the stator 12 of the brake motor 10 is greater than or equal to the maximum distance between the third connecting wall 624 and the stator 12 of the brake motor 10. Thus, while ensuring that the third receiving cavity 60c formed by the second cover plate 63, the third connecting wall 624, and the third partition 623 can accommodate the motor controller 70, the dimensions of the electromechanical braking device 100 along the motor shaft 11 are also compressed, thereby preventing interference between the electromechanical braking device 100 and the suspension system or steering system.

[0089] Please refer to the above. Figure 10 , Figure 11 and Figure 12 ,in Figure 10 This illustration shows a structural diagram of a transmission gear assembly 20 provided in one embodiment of the present application; Figure 11 This illustration shows a cross-sectional view of a transmission gear assembly 20 provided in one embodiment of this application. Figure 12 This illustration shows a structural diagram of the transmission gear assembly 20 and the brake motor 10 provided in one embodiment of this application.

[0090] In one embodiment, the transmission gear assembly 20 includes multiple gears 21, multiple fixed shafts 22, and multiple bearings 23. The bearings 23 support the fixed shafts 22, and the gears 21 are fixed to the fixed shafts 22. The gears 21 also rotate relative to the housing 60 with the fixed shafts 22 to achieve power transmission. The multiple gears 21 have different diameters and cooperate with each other to adjust and transmit the braking force output by the brake motor 10 to the lead screw 40.

[0091] The outer ring of the bearing 23 is used to fix it to the housing 60, and the inner ring of the bearing 23 is used to support the fixed shaft 22 to ensure that the fixed shaft 22 can support the gear 21, and at the same time, the fixed shaft 22 can rotate relative to the housing 60 with the gear 21 to realize power transmission.

[0092] For example, bearing 23 includes a first bearing 231, a second bearing 232, a third bearing 233, and a fourth bearing 234. The first bearing 231 and the third bearing 233 are spaced apart along the axial direction of the motor shaft 11, and the first bearing 231 is arranged axially along the motor shaft 11 on the side of the third bearing 233 opposite to the stator 12 of the brake motor 10. The first bearing 231 is fixed to the first cover plate 62, and the third bearing 233 is fixed to the motor housing 61. The first bearing 231 and the third bearing 233 are spaced apart from the motor controller 70 along the radial direction of the motor shaft 11.

[0093] The second bearing 232 and the fourth bearing 234 are spaced apart along the axial direction of the motor shaft 11, with the second bearing 232 positioned axially opposite to the lead screw 40 on the side of the fourth bearing 234. The second bearing 232 is fixed to the first cover plate 62, and the fourth bearing 234 is fixed to the motor housing 61. Radially along the motor shaft 11, the second bearing 232 and the fourth bearing 234 are positioned opposite to the motor controller 70 on the side where the first bearing 231 and the third bearing 233 are located.

[0094] The fixed shaft 22 includes an input shaft 221 and a transmission shaft 222. The axial direction of the input shaft 221 is parallel to the axial direction of the motor shaft 11, and the axial direction of the transmission shaft 222 is also parallel to the axial direction of the motor shaft 11. The opposite ends of the input shaft 221 are respectively used to extend into the inner rings of the first bearing 231 and the third bearing 233, meaning the inner rings of the first bearing 231 and the third bearing 233 support the two ends of the input shaft 221. The opposite ends of the transmission shaft 222 are respectively used to extend into the inner rings of the second bearing 232 and the fourth bearing 234, meaning the outer rings of the second bearing 232 and the fourth bearing 234 support the two ends of the transmission shaft 222.

[0095] Gear 21 includes an input gear 211, an intermediate gear 212, and an output gear 213. The input gear 211 and intermediate gear 212 are fixed to the input shaft 221, and the output gear 213 is fixed to the transmission shaft 222. The input gear 211 meshes with the first segment 111 of the motor shaft 11, rotating with the motor shaft 11 and driving the input shaft 221 to rotate, thereby driving the intermediate gear 212 to rotate. The intermediate gear 212 meshes with the output gear 213, rotating synchronously with the input gear 211 and driving the output gear 213 to rotate, thereby driving the output shaft to rotate. The transmission gear assembly 20 transmits the braking force of the brake motor 10 through the output axial lead screw 40.

[0096] In one embodiment, the first bearing 231 is arranged radially spaced from the circuit board 71 along the motor shaft 11.

[0097] In one embodiment, the circuit board 71 partially overlaps with the motor shaft 11 of the brake motor 10 along the axial direction of the motor shaft 11.

[0098] Please refer to the above. Figure 13 , Figure 14 and Figure 15 ,in Figure 13 This is a partial structural schematic diagram of an electromechanical braking device 100 provided in one embodiment of this application, viewed from one side. Figure 14 This is a partial structural schematic diagram of an electromechanical braking device 100 provided in one embodiment of this application, viewed from another side. Figure 15 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0099] In one embodiment, the first cover plate 62 includes a first receiving groove 625 and a second receiving groove 626. The first receiving groove 625 is used to receive the motor controller 70, and the opening of the first receiving groove 625 faces away from the motor housing 61 along the axial direction of the motor shaft 11 of the brake motor 10. The second cover plate 63 is used to cover the opening of the first receiving groove 625 to form a third receiving cavity 60c, thereby realizing the reception of the motor controller 70.

[0100] The second receiving groove 626 is used to receive a portion of the transmission gear assembly 20. Along the axial direction of the motor shaft 11 of the brake motor 10, the opening of the second receiving groove 626 faces the motor housing 61. The motor housing 61 is used to cover the opening of the second receiving groove 626 to form a second receiving cavity 60b, thereby realizing the reception of the transmission gear assembly 20.

[0101] In this embodiment, the first cover plate 62 forms a cavity for accommodating the motor controller 70 and a portion of a cavity for accommodating the transmission gear assembly 20. Because the motor controller 70 and the first bearing 231 are arranged radially spaced apart along the brake motor 10, the first receiving groove 625 and the second receiving groove 626 are arranged approximately radially along the brake motor 10 and parallel to the arrangement direction of the motor shaft 11 and the input gear 211. This application provides that the openings of the first receiving groove 625 and the second receiving groove 626 are oriented oppositely along the axial direction of the motor shaft 11 of the brake motor 10, facilitating the insertion of the motor controller 70 and the transmission gear assembly 20 from both sides of the first cover plate 62.

[0102] In one embodiment, the first cover plate 62 includes an axial partition 627, the planar direction of which is parallel to the radial direction of the motor shaft 11. Along the axial direction of the motor shaft 11 of the brake motor 10, the axial partition 627 includes a first plane 6271 and a second plane 6272 facing away from each other. The first plane 6271 is used to form a portion of the bottom of the first receiving groove 625, and the second plane 6272 is used to form a portion of the bottom of the second receiving groove 626.

[0103] The first receiving groove 625 and the second receiving groove 626 overlap along the axial portion of the motor shaft 11 of the brake motor 10. Because the circuit board 71 of the motor controller 70 and the first bearing 231 are arranged radially at intervals along the motor shaft 11 of the brake motor 10, and the thickness of the circuit board 71 is small, the input gear 211 of the transmission gear assembly 20 can mesh with the motor shaft 11 using the axial space between the circuit board 71 and the stator 12, thereby making the arrangement of the motor shaft 11, the circuit board 71 and the transmission gear assembly 20 more compact.

[0104] In one embodiment, along the axial direction of the motor shaft 11 of the brake motor 10, an intermediate gear 212 is arranged between the first bearing 231 and the input gear 211. Along the radial direction of the motor shaft 11 of the brake motor 10, the intermediate gear 212 is spaced apart from the axial partition 627.

[0105] In this embodiment, along the axial direction of the brake motor 10, the intermediate gear 212 is arranged between the first bearing 231 and the input gear 211. Thus, the axial partition 627 can utilize the axial dimension of the intermediate gear 212 to be aligned with the radial direction of the intermediate gear 212 along the motor shaft 11 of the brake motor 10, thereby separating the first receiving groove 625 and the second receiving groove 626, and making the arrangement of the motor shaft 11, the circuit board 71 and the transmission gear assembly 20 more compact.

[0106] Please refer to the above. Figure 16 and Figure 17 ;in Figure 16 This is a partial structural schematic diagram of an electromechanical braking device 100 provided in one embodiment of this application, viewed from one side. Figure 17 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0107] In one embodiment, the electromechanical braking device 100 of this application includes a position sensor 72, which is used to detect the rotational speed of the brake motor 10. The position sensor 72 is also electrically connected to a motor controller 70, and transmits a detection signal to the motor controller 70. The motor controller 70 receives the detection signal and controls the brake motor 10 to output braking force based on the detection signal. That is, the motor controller 70 can form a closed-loop control of the brake motor 10, improving the reliability of the electromechanical braking device 100 of this application.

[0108] For example, the position sensor 72 includes a magnetic ring 721 and a sensing chip 722. In one embodiment, the magnetic ring is used to drive the motor shaft 11 of the brake motor 10. Along the axial direction of the motor shaft 11, the magnetic ring 721 is disposed at the end of the first segment 111 of the motor shaft 11 opposite to the stator 12. The sensing chip 722 is fixed on the circuit board 71 corresponding to the position of the magnetic ring 721, that is, the projection of the magnetic ring 721 on the circuit board 71 along the axial direction of the motor shaft 11 partially overlaps with the sensing chip 722. The sensing chip 722 is used for electrical connection with the circuit board 71. The position sensor 72 monitors the magnetic ring 721 on the motor shaft 11 through the sensing chip 722 to monitor the rotational speed of the motor shaft 11, thereby realizing the monitoring of the rotational speed of the brake motor 10.

[0109] In one embodiment, the electromechanical braking device 100 of this application includes a three-phase copper busbar 14, which electrically connects a motor controller 70 and a stator 12. The three-phase copper busbar 14 transmits the drive signal from the motor controller 70 to the stator 12 of the brake motor 10, so that the stator 12 generates an alternating magnetic field to drive the rotor 13 to synchronously rotate the motor shaft 11, thereby outputting braking force. That is, the motor controller 70 sends a drive signal to the brake motor 10 through the three-phase copper busbar 14. Alternatively, it can be described that the motor controller 70 achieves the function of driving the brake motor 10 through the electrical connection of the three-phase copper busbar 14.

[0110] In one embodiment, the electromechanical braking device 100 of this application includes a pressure sensor (not shown) for detecting the pressure exerted by the friction pad 30 on the brake disc 201.

[0111] In one embodiment, the electromechanical braking device 100 of this application includes a pressure sensor transmission line 73, which electrically connects a motor controller 70 and a pressure sensor. The pressure sensor transmission line 73 transmits the detection signal from the pressure sensor to the motor controller 70, which receives the detection signal and controls the braking force output by the brake motor 10 based on the detection signal. That is, the motor controller 70 achieves the function of receiving braking force detection through an electrical connection to the pressure sensor transmission line 73.

[0112] In one embodiment, along the axial direction of the motor shaft 11, the three-phase copper busbar 14 and the pressure sensor transmission line 73 are respectively located on the side of the circuit board 71 of the motor controller 70 facing the stator 12. Along a direction perpendicular to the arrangement of the motor shaft 11 and the transmission gear assembly 20, the three-phase copper busbar 14 and the pressure sensor transmission line 73 are arranged on both sides of the motor shaft 11. This increases the spacing between the three-phase copper busbar 14 and the pressure sensor transmission line 73, reducing the mutual interference between the drive signal transmitted by the three-phase copper busbar 14 and the detection signal transmitted by the pressure sensor transmission line 73.

[0113] In one embodiment, the electromechanical braking device 100 of this application includes a signal terminal 74. One end of the signal terminal 74 is used for electrical connection to a circuit board 71, and the other end of the signal terminal 74 extends out of the housing 60 of the electromechanical braking device 100 and is electrically connected to an external transmission line. That is, the signal terminal 74 is used to transmit signals between the motor controller 70 and the rest of the vehicle via the external transmission line.

[0114] In one embodiment, along the arrangement direction of the motor shaft 11 and the input gear 211 of the transmission gear assembly 20, the signal terminal 74 is located at the end of the circuit board 71 relatively away from the motor shaft 11. Therefore, along the arrangement direction of the motor shaft 11 and the input gear 211 of the transmission gear assembly 20, the distance between the signal terminal 74 and the three-phase busbar 14 and the pressure sensor transmission line 73 is greater, which can reduce the mutual interference between the external signal transmitted by the signal terminal 74 and the drive signal transmitted by the three-phase busbar 14, as well as between the external signal and the detection signal transmitted by the pressure sensor transmission line 73.

[0115] In one embodiment, the electromechanical braking device 100 of this application further includes a plurality of bus capacitors 75, each bus capacitor 75 being fixed to a circuit board 71 and electrically connected to a drive circuit on the circuit board 71. The bus capacitors 75 are used to supply power to the drive circuit on the circuit board 71.

[0116] In one embodiment, along the axial direction of the motor shaft 11, the bus capacitor 75 is fixed to the side of the circuit board 71 facing the stator 12.

[0117] In one embodiment, along the axial direction of the motor shaft 11, the height of the bus capacitor 75 is greater than the distance between the circuit board 71 and the motor shaft 11. Along the radial direction of the brake motor 10, a plurality of bus capacitors 75 are spaced apart from the motor shaft 11, and at least one bus capacitor 75 is arranged on the side of the motor shaft 11 opposite to the input gear 211.

[0118] In this embodiment, the busbar capacitor 75 is dynamically fixed to the circuit board 71 facing the stator 12 along the axial direction of the motor shaft 11, and the height of the busbar capacitor 75 is greater than the distance between the circuit board 71 and the motor shaft 11. By arranging the busbar capacitor 75 and the motor shaft 11 at radial intervals along the motor shaft 11, interference between the busbar capacitor 75 and the motor shaft 11 is avoided. Furthermore, by setting at least one busbar capacitor 75 to be arranged radially along the motor shaft 11 on the side of the motor shaft 11 away from the input gear 211, the space of the motor shaft 11 along the radial direction of the brake motor 10 is reasonably utilized. While ensuring that the busbar capacitor 75 does not interfere with the motor shaft 11, the distance between the busbar capacitor 75 with a larger axial dimension in the motor controller 70 and the motor shaft 11, the input gear 211, and the intermediate gear 212 is smaller. The arrangement between the motor controller 70, the motor shaft 11, and the transmission gear assembly 20 is more compact, which is beneficial to the miniaturization design of the electromechanical braking device 100.

[0119] Please refer to the above. Figure 18 and Figure 19 ,in Figure 18 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 19 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0120] In one embodiment, the axial partition 627 includes a first through hole 6273, which extends through the axial partition 627 along the axial direction of the motor shaft 11 of the brake motor 10. That is, the first through hole 6273 connects the second receiving cavity 60b and the third receiving cavity 60c. Along the axial direction of the motor shaft 11, the first through hole 6273 is positioned corresponding to the positions of the magnetic ring 721 and the sensing chip 722. The first through hole 6273 partially accommodates the magnetic ring 721. That is, the magnetic ring 721 extends into the first through hole 6273 along the axial direction of the motor shaft 11 so that the sensing chip 722 can detect it.

[0121] In one embodiment, the cavity for accommodating the transmission gear assembly 20 is coated with lubricating grease (not shown in the figure), that is, the second accommodating cavity 60b is coated with lubricating grease, which is used to lubricate the transmission gear assembly 20 to reduce wear.

[0122] In one embodiment, the first plane 6271 of the axial partition 627 is used to fix an oil-blocking film (not shown), that is, the side of the axial partition 627 facing the circuit board 71 is used to fix the oil-blocking film. The oil-blocking film is used to shield the first through hole 6273. Thus, the oil-blocking film can prevent lubricating grease in the second receiving cavity 60b from entering the third receiving cavity 60c to protect the motor controller 70. In addition, since the oil-blocking film is fixed axially along the motor shaft 11 to the side of the axial partition 627 facing the circuit board 71, the magnetic ring 721 can partially enter the first through hole 6273. This can reduce the axial distance between the magnetic ring 721 and the sensing chip 722, ensuring reliable detection by the position sensor 72.

[0123] Please refer to the above. Figure 20 and Figure 21 , Figure 21 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 21 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0124] In one embodiment, the axial partition 627 includes a second through hole 6274 and a third through hole 6275, which pass through the axial partition 627 along the axial direction of the motor shaft 11 of the brake motor 10. The second through hole 6274 and the third through hole 6275 are located on both sides of the first through hole 6273, perpendicular to the direction of the arrangement of the motor shaft 11 and the transmission gear assembly 20. The second through hole 6274 is used to avoid the three-phase copper busbar 14, and the third through hole 6275 is used to avoid the pressure sensor transmission line 73. That is, the three-phase copper busbar 14 is electrically connected to the stator 12 and the motor controller 70 located on both sides of the axial partition 627 along the axial direction of the motor shaft 11 through the second through hole 6274. The pressure sensor transmission line 73 is electrically connected to the pressure sensor and the motor controller 70 located on both sides of the axial partition 627 along the axial direction of the motor shaft 11 through the third through hole 6275.

[0125] In one embodiment, the electromechanical braking device 100 of this application includes a fixing adhesive (not shown). The fixing adhesive fills the space between the three-phase copper busbar 14 and the second through hole 6274. The fixing adhesive is used to improve the stability of the three-phase copper busbar 14 fixed in the housing 60, and also to seal the second through hole 6274, preventing lubricating grease in the second receiving cavity 60b from entering the third receiving cavity to protect the motor controller 70.

[0126] In one embodiment, a fixing adhesive is filled between the pressure sensor transmission line 73 and the third through hole 6275. The fixing adhesive is used to improve the stability of the pressure sensor fixed in the housing 60, and also to seal the third through hole 6275 to prevent lubricating grease in the second receiving cavity 60b from entering the third receiving cavity, thereby protecting the motor controller 70.

[0127] In one embodiment, the first cover plate 62 includes a first base plate 628 and a second base plate 629. Along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, the first base plate 628 and the second base plate 629 are positioned on opposite sides of the axial partition 627. Furthermore, along the radial direction of the motor shaft 11, the first base plate 628 and the motor controller 70 are located on the same side of the motor shaft 11, and the second base plate 629 and the transmission gear assembly 20 are located on the same side of the motor shaft 11. The first base plate 628 forms another portion of the bottom of the first receiving groove 625; that is, the first base plate 628 and the first plane 6271 of the axial partition 627 together form the bottom of the first receiving groove 625. The second base plate 629 forms another portion of the bottom of the second receiving groove 626; that is, the second base plate 629 and the second plane 6272 of the axial partition 627 together form the bottom of the second receiving groove 626.

[0128] Along the axial direction of the motor shaft 11 of the brake motor 10, the stator 12, the first base plate 628, the axial partition 627, and the second base plate 629 are arranged sequentially. That is, along the axial direction of the motor shaft 11, the distance between the first base plate 628 and the circuit board 71 of the motor controller 70 is greater than the distance between the axial partition 627 and the circuit board of the motor controller 70. Therefore, components with larger axial dimensions in the motor controller 70 can be arranged between the first base plate 628 and the circuit board 71. By setting the first base plate 628 to be located on the side of the axial partition 627 facing the stator 12 along the axial direction of the motor shaft 11, it is beneficial to optimize the layout of the various components in the motor controller 70. Along the axial direction of the motor shaft 11, the distance between the second base plate 629 and the stator 12 is greater than the distance between the axial partitions 627. This allows the thickness of the second base plate 629 to be relatively larger than the thickness of the axial partition 627, which is beneficial for the second base plate 629 to accommodate and fix part of the bearing 23 in the transmission gear assembly 20.

[0129] In one embodiment, the signal terminal 74 is located on the first base plate 628 in the first receiving groove 625, and along the arrangement direction of the motor shaft 11 and the input gear 211 of the transmission gear assembly 20, the signal terminal 74 is located at the end of the first base plate 628 that is relatively far away from the axial partition 627. Therefore, along the arrangement direction of the input gear 211 of the transmission gear assembly 20, the distance between the signal terminal 74 and the three-phase copper busbar 14 and the pressure sensor transmission line 73 is larger, which can reduce the mutual interference between the external signal transmitted by the signal terminal 74 and the drive signal transmitted by the three-phase copper busbar 14, and between the external signal and the detection signal transmitted by the pressure sensor transmission line 73.

[0130] In one embodiment, the first base plate 628 includes a fourth through hole 6281, which extends through the first base plate 628 along the axial direction of the motor shaft 11. Along the arrangement direction of the motor shaft 11 and the input gear 211 of the transmission gear assembly 20, the fourth through hole 6281 is located at one end of the first base plate 628 relatively away from the axial partition 627. The fourth through hole 6281 is used to avoid signal terminals 74. That is, signal terminals 74 are electrically connected to the circuit board 71 of the motor controller 70 and external transmission lines through the fourth through hole 6281.

[0131] In one embodiment, along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, the second base plate 629 includes a side away from the second cover plate 63. The side of the second base plate 629 includes a chamfer 6291, which is used to avoid the structure around the hub of the wheel 200, thereby preventing interference between the housing 60 of the electromechanical braking device 100 and the remaining components at the wheel 200. Exemplarily, the chamfer 6291 includes a rounded corner. The arc segment of the rounded corner matches the arc shape of the hub of the wheel 200, further preventing interference between the housing 60 of the electromechanical braking device 100 and the remaining components at the wheel 200.

[0132] In one embodiment, along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, the first cover plate 62, the circuit board 71, and the first connecting wall 613 are designed with an arc shape on the side relatively away from the second base plate 629. This allows for the adaptation to smaller wheel hub sizes.

[0133] Please refer to the above. Figure 22 and Figure 23 ,in Figure 22 This illustration shows a partially exploded structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 23 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0134] In one embodiment, along the axial direction of the motor shaft 11 of the brake motor 10, the opening of the first receiving groove 625 includes a first mounting surface 6251, which is used to abut and fix to the second cover plate 63. The second base plate 629 includes an outer surface 6292, which is located on the side of the second base plate 629 away from the stator 12 along the axial direction of the motor shaft 11 of the brake motor 10, and the distance between the outer surface 6292 and the stator 12 is greater than the distance between the first mounting surface 6251 and the stator 12.

[0135] On the one hand, based on the axial arrangement of the stator 12, the first base plate 628, the axial partition 627, and the second base plate 629 along the motor shaft 11, the outer surface 6292 of the second base plate 629 is positioned far from the stator 12, resulting in a thicker second base plate 629. This facilitates the second receiving groove 626 in accommodating and fixing part of the bearing 23 of the transmission gear assembly 20 through the second base plate 629. On the other hand, the distance between the first mounting surface 6251 and the stator 12 relative to the outer surface 6292 of the second base plate 629 is smaller. That is, the opening of the first receiving groove 625 is recessed relative to the outer surface 6292 of the second base plate 629. This reduces the axial height of the second cover plate 63 that fits onto the first mounting surface 6251, thereby reducing the overall axial dimension of the electromechanical braking device 100.

[0136] In one embodiment, along the axial direction of the motor shaft 11, the distance between the surface of the second cover plate 63 facing away from the stator 12 and the stator 12 is equal to the distance between the outer surface 6292 of the second base plate 629 and the stator 12. That is, the height by which the opening of the first receiving groove 625 sinks relative to the outer surface 6292 of the second base plate 629 is equal to the thickness of the second cover plate 63, thereby making the second cover plate 63 and the outer surface 6292 of the first cover plate 62 facing away from the stator 12 flush with each other along the axial direction of the motor shaft 11 of the brake motor 10.

[0137] Please refer to the above. Figure 24 , Figure 25 and Figure 26 ,in Figure 24 This is a partial structural schematic diagram of an electromechanical braking device 100 provided in one embodiment of this application, viewed from one side. Figure 25 This is a partial structural schematic diagram of an electromechanical braking device 100 provided in one embodiment of this application, viewed from another side. Figure 26 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0138] In one embodiment, the first cover plate 62 includes a radial partition 630, which is referred to as the first radial partition 631 for ease of description. The planar direction of the first radial partition 631 is parallel to the axial direction of the motor shaft 11. Along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, the first radial partition 631 includes a first sidewall 631a and a second sidewall 631b facing away from each other. The first sidewall 631a forms a portion of the groove wall of the first receiving groove 625, and the second sidewall 631b forms a portion of the groove wall of the second receiving groove 626. That is, along the axial direction of the motor shaft 11, the first radial partition 631 connects the axial partition 627 and the second base plate 629.

[0139] Based on the radial arrangement of the second base plate 629 and the axial partition 627 along the motor shaft 11, and along the axial direction of the motor shaft 11, the second base plate 629 is located on the side of the axial partition 627 away from the stator 12. In this application, the axial partition 627 and the second base plate 629 are connected by the first radial partition 631. The spaces on both sides of the first radial partition 631 can respectively accommodate the circuit board 71, the gear 21 of the transmission gear assembly 20, or the bearing 23, thereby making the arrangement of the circuit board 71 and the transmission gear assembly 20 more compact, which is conducive to the miniaturization of the electromechanical braking device 100.

[0140] In one embodiment, the first sidewall 631a includes a protrusion 6311 extending toward the center of the first receiving groove 625 along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, i.e., the protrusion 6311 extends away from the second base plate 629. The protrusion 6311 forms a first bearing receiving groove 6312 along the axial direction of the motor shaft 11 of the brake motor 10, with the opening of the first bearing receiving groove 6312 facing the stator 12 and communicating with the second receiving groove 626. The first bearing receiving groove 6312 is used to receive and fix a bearing 23 in the transmission gear assembly 20. Exemplarily, the first bearing receiving groove 6312 is used to receive and fix a first bearing 231, the first bearing 231 is used to fix the input shaft 221 of the transmission gear assembly 20, and the input shaft 221 is used to fix the input gear 211 of the transmission gear assembly 20.

[0141] In this embodiment, a portion of the structure of the first radial partition 631 extends into the first receiving groove 625 along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, forming a first bearing receiving groove 6312. This compresses the gap between the first bearing 231 of the transmission gear assembly 20 and the motor shaft 11, and ensures reliable meshing and transmission between the input gear 211 and the first segment 111 of the motor shaft 11. The electromechanical braking device 100 has a smaller dimension along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, and the arrangement of the motor shaft 11, the circuit board 71, and the transmission gear assembly 20 is more compact.

[0142] In one embodiment, along the axial direction of the motor shaft 11 of the brake motor 10, the circuit board 71 is flush with and spaced apart from the first bearing 231. Because the radial dimension of the first bearing 231 is small, arranging the circuit board 71 close to the first bearing 231 can shorten the radial distance between the input gear 211 and the motor shaft 11, making the transmission gear assembly 20 and the motor shaft 11 more compactly arranged.

[0143] Please refer to the above. Figure 27 , Figure 28 ,in Figure 27 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 28 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0144] In one embodiment, the circuit board 71 includes a clearance notch 711. Along the arrangement direction of the motor shaft 11 and the transmission gear assembly 20, the opening of the clearance notch 711 faces the output gear 213 of the transmission gear assembly 20, i.e., towards the first bearing 231. The clearance notch 711 also surrounds the periphery of the protrusion 6311 on the first sidewall 631a. That is, the clearance notch 711 of the circuit board 71 is used to avoid the protrusion 6311 on the first sidewall 631a.

[0145] Along a direction perpendicular to the arrangement of the motor shaft 11 and the input gear 211, the circuit board 71 includes two side regions. For ease of explanation, these two side regions will be defined as a first side region 712 and a second side region 713. Along the arrangement of the motor shaft 11 and the input gear 211, the first side region 712 and the second side region 713 are located on both sides of the protruding structure 6311. Alternatively, it can be understood that the circuit board 71 of this application forms the first side region 712 and the second side region 713 by providing a clearance notch 711.

[0146] In this embodiment, the clearance notch 711 allows the first sidewall 631a to be provided with a protruding structure 6311 for forming a first bearing receiving groove 6312. Along the direction perpendicular to the arrangement of the motor shaft 11 and the input gear 211, the circuit board 71 increases its overall area through two side regions. These two side regions can be used to house the components of the motor controller 70, reducing the overall area overhead of the motor controller 70 and shortening the external dimensions of the electromechanical braking device 100 along the arrangement direction of the motor shaft 11 and the input gear 211, thus facilitating the miniaturization design of the electromechanical braking device 100.

[0147] In one embodiment, the bottom of the second receiving groove 626 includes a third bearing receiving groove 6261, that is, along the axial direction of the motor shaft 11, the first cover plate 62 is provided with a third bearing receiving groove 6261 facing the stator 12. The third bearing receiving groove 6261 is used to receive and fix the second bearing 232, which is used to support a drive shaft 222 of the transmission gear assembly 20. In this embodiment, by providing the third bearing receiving groove 6261 at the bottom of the second receiving groove 626, the second bearing 232 can be fixed to the housing 60 through the third bearing receiving groove 6261.

[0148] In one embodiment, along the direction in which the motor shaft 11 and the transmission gear assembly 20 are arranged, a third bearing receiving groove 6261 is arranged on the side of the first bearing receiving groove 6312 facing away from the motor shaft 11. Along the axial direction of the motor shaft 11 of the brake motor 10, the groove depth of the first bearing receiving groove 6312 is greater than the groove depth of the third bearing receiving groove 6261. That is, along the axial direction of the motor shaft 11, the distance between the bottom of the first bearing receiving groove 6312 and the stator 12 is greater than the distance between the bottom of the third bearing receiving groove 6261 and the stator 12. Along the radial direction of the motor shaft 11 of the brake motor 10, the diameter of the first bearing receiving groove 6312 is greater than the diameter of the third bearing receiving groove 6261.

[0149] In this embodiment, along the direction of the motor shaft 11 and the transmission gear assembly 20, the third bearing receiving groove 6261 is arranged on the side of the first bearing receiving groove 6312 away from the motor shaft 11. The groove depth and diameter of the third bearing receiving groove 6261 are smaller than those of the first bearing receiving groove 6312, respectively. This allows the thickness and diameter of the second bearing 232 to be smaller than those of the first bearing 231. In conjunction with the transmission ratio of the transmission gear assembly 20, the larger thickness and diameter of the first bearing 231 can support higher rotational speeds of the input shaft 221. The second bearing 232 supports a lower rotational speed of the transmission shaft 222. Reducing the thickness and diameter of the second bearing 232 does not affect the braking force output of the transmission gear assembly 20 and facilitates the lightweighting and miniaturization of the electromechanical braking device 100.

[0150] Please refer to the above. Figure 29 , Figure 29 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0151] In one embodiment, the first cover plate 62 includes another radial partition 630 along the axial direction of the brake motor 10. This other radial partition 630 connects the axial partition 627 and the first base plate 628. For ease of description, this application will subsequently define one radial partition 630 of the first cover plate 62 as the first radial partition 631 and the other radial partition 630 as the second radial partition 632. Along the direction of the motor shaft 11 and the input gear 211, the first radial partition 631 and the second radial partition 632 are positioned on opposite sides of the motor shaft 11. The first radial partition 631 is relatively closer to the output gear 213, and the second radial partition 632 is relatively closer to the signal terminal 74. The second radial partition 632 connects the axial partition 627 and the first base plate 628; that is, the second radial partition 632 forms part of the groove wall of the first receiving groove 625, and also forms part of the groove wall of the second receiving groove 626.

[0152] Please refer to the above. Figure 30 and Figure 31 ,in Figure 30 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 31 This illustration shows a partially exploded structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0153] In one embodiment, the electromechanical braking device 100 includes a third cover plate 64, which seals the side of the motor housing 61 facing away from the first cover plate 62. Along the axial direction of the motor shaft 11 of the brake motor 10, the third cover plate 64, the stator 12 of the brake motor 10, and the first cover plate 62 are arranged at intervals. That is, the third cover plate 64 is located along the axial direction of the motor shaft 11 on the side of the cylindrical housing 611 facing away from the first cover plate 62, and the third cover plate 64 is used to cover and seal the opening of the cylindrical housing 611 on the side facing away from the first cover plate 62.

[0154] Alternatively, it can be understood that the motor housing 61 includes a motor receiving groove 61a and a third receiving groove 61b. The motor receiving groove 61a includes a cylindrical shell 611. Along the axial direction of the motor shaft 11, the opening of the cylindrical shell 611 faces away from the first cover plate 62, and the opening of the third receiving groove 61b faces the first cover plate 62. That is, along the axial direction of the motor shaft 11, the motor receiving groove 61a and the third receiving groove 61b are arranged adjacent to each other. And along the axial direction of the motor shaft 11, the opening of the motor receiving groove 61a faces away from the first cover plate 62, and the opening of the third receiving groove 61b faces the first cover plate 62. Along the axial direction of the motor shaft 11 of the brake motor 10, the third cover plate 64 is fixed to the opening of the motor receiving groove 61a, and the third cover plate 64 is used to close the cavity on the motor housing 61 that accommodates the brake motor 10. Along the axial direction of the motor shaft 11 of the brake motor 10, the first cover plate 62 is fixed to the opening of the third receiving groove 61b. The second receiving groove 626 and the third receiving groove 61b are used to enclose and form a cavity for receiving the transmission gear assembly 20.

[0155] Please refer to the above. Figure 32 and Figure 33 ,in Figure 32 This illustration shows a partial structural diagram of an electromechanical braking device 100 provided in one embodiment of this application; Figure 33 This illustration shows a partial cross-sectional structural diagram of an electromechanical braking device 100 provided in one embodiment of this application.

[0156] In one embodiment, the motor housing 61 includes a partition 65, the planar direction of which is parallel to the radial direction of the motor shaft 11. Along the axial direction of the motor shaft 11 of the brake motor 10, the partition 65 is arranged on the side of the stator 12 of the brake motor 10 facing away from the third cover plate 64. That is, along the axial direction of the motor shaft 11, the partition 65 includes a third plane 651 and a fourth plane 652 facing away from each other, with the third plane 651 facing the first cover plate 62 and the fourth plane 652 facing the third cover plate 64. The third plane 651 forms a portion of the bottom of the third receiving groove 61b, and the fourth plane 652 forms the bottom of the motor receiving groove 61a.

[0157] In one embodiment, the partition 65 includes a fifth through hole 653, which is used to penetrate the partition 65 along the axial direction of the motor shaft 11. The diameter of the fifth through hole 653 is larger than the outer diameter of the first segment 111 of the motor shaft 11. The motor shaft 11 is used to pass through the partition 65 through the fifth through hole 653 and partially extend into the cavity for accommodating the transmission gear assembly 20. That is, the first segment 111 of the motor shaft 11 is used to pass through the fifth through hole 653 and extend into the cavity of the transmission gear assembly 20 to achieve meshing transmission with the input gear 211 of the transmission gear assembly 20.

[0158] In one embodiment, the partition plate 65 includes a second bearing receiving groove 654. The opening of the second bearing receiving groove 654 faces the stator 12 along the axial direction of the motor shaft 11. The second bearing receiving groove 654 is used to fix one motor bearing 15 of the motor shaft 11. Exemplarily, along the axial direction of the motor shaft 11, the meshing teeth of a segment of the motor shaft 11, one motor bearing 15, the stator 12, and another motor bearing 15 are arranged sequentially. For ease of description, this application defines one of the motor bearings 15 as the first motor bearing 151 and the other motor bearing 15 as the second motor bearing 152. Along the axial direction of the motor shaft 11, the meshing teeth of the first segment 111, the first motor bearing 151, the stator 12, and the second motor bearing 152 are arranged sequentially. The second bearing receiving groove 654 is used to fix the first motor bearing 151 of the motor shaft 11.

[0159] The partition plate 65 is provided with a flange 655, which surrounds the fifth through hole 653 and extends axially toward the stator 12 along the motor shaft 11. The flange 655 is used to fix the outer ring of one of the motor bearings 15, and the inner ring of the motor bearing 15 is fixed to the middle section of the motor shaft 11. By providing a second bearing receiving groove 654 in the partition plate 65 to fix the first motor bearing 151, the smooth rotation of the motor shaft 11 can be ensured, while facilitating the miniaturization design of the electromechanical braking device 100.

[0160] In one embodiment, the bottom of the second bearing receiving groove 654 includes a fifth through hole 653, which is used to avoid a section of the motor shaft 11. The diameter of the fifth through hole 653 is larger than the outer diameter of the first section 111 of the motor shaft 11.

[0161] In the above embodiment, the brake motor 10 is inserted into the motor housing 61 through the slot of the motor receiving groove 61a, and the motor shaft 11 extends from one side of the motor receiving groove 61a through the fifth through hole 653 at the bottom of the second bearing receiving groove 654 into the third receiving groove 61b. The inner diameter of the fifth through hole 653 is larger than the outer diameter of a section of the motor shaft 11 to ensure assembly.

[0162] In one embodiment, the partition 65 includes a fifth bearing receiving groove 656, with the opening of the fifth bearing receiving groove 656 facing the first cover plate 62 along the axial direction of the motor shaft 11. The fifth bearing receiving groove 656 is used to receive a third bearing 233, which, along the axial direction of the motor shaft 11, supports the other end of the input shaft 221 away from the first bearing 231. By providing the fifth bearing receiving groove 656 in the partition 65 to fix the third bearing 233, smooth rotation of the input shaft 221 can be ensured while facilitating the miniaturization design of the electromechanical braking device 100.

[0163] In one embodiment, the motor housing 61 includes a third base plate 66, which is arranged on one side of the partition plate 65 along the arrangement direction of the motor shaft 11 and the transmission gear assembly 20. The third base plate 66 is arranged opposite to the second base plate 629 of the first cover plate 62 along the axial direction of the motor shaft 11. The third base plate 66 is used to form another part of the bottom of the third receiving groove 61b. That is, the third base plate 66 is used to cooperate with the partition plate 65 to form the bottom of the third receiving groove 61b.

[0164] In one embodiment, the third base plate 66 includes a sixth bearing receiving groove 661, with the opening of the sixth bearing receiving groove 661 facing the first cover plate 62 along the axial direction of the motor shaft 11. The sixth bearing receiving groove 661 is used to receive a fourth bearing 234, which supports the output shaft of the transmission gear assembly 20. By providing a sixth bearing receiving groove 661 in the third base plate 66 to fix the fourth bearing 234, the smooth rotation of the transmission shaft 222 can be ensured, while facilitating the miniaturization design of the electromechanical braking device 100.

[0165] Please refer to the above. Figure 34 , Figure 34 This illustration shows a partial structural diagram of an electromechanical braking device provided in one embodiment of the present application.

[0166] In one embodiment, the third cover plate 64 includes a fourth bearing receiving groove 641 for accommodating another motor bearing 15. Specifically, the opening of the fourth bearing receiving groove 641 faces the first cover plate 62 along the axial direction of the motor shaft, and the fourth bearing receiving groove 641 is used to fix the second motor bearing 152. This application, by providing a fourth bearing receiving groove 641 on the third cover plate 64 to accommodate the second motor bearing 152, facilitates the smooth rotation of the motor shaft 11 and also enables the miniaturization design of the electromechanical braking device 100.

[0167] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of protection of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An electromechanical braking device, characterized in that, The electromechanical braking device includes a brake motor, a transmission gear assembly, and friction pads. The motor shaft of the brake motor, along its radial direction, drives the friction pads to brake the vehicle's brake disc via the transmission gear assembly. The housing of the electromechanical braking device includes a motor housing and a first cover plate. Along the axial direction of the brake motor, the motor housing and the first cover plate are arranged sequentially, wherein: The motor housing is used to form a cavity for accommodating the brake motor; The first cover plate is used to enclose the motor housing to form a cavity for accommodating the transmission gear assembly.

2. The electromechanical braking device according to claim 1, characterized in that, The electromechanical braking device includes a second cover plate. The motor housing, the first cover plate, and the second cover plate are arranged sequentially along the axial direction of the brake motor. The cavity formed by the second cover plate and the first cover plate is used to accommodate the motor controller of the electromechanical braking device.

3. The electromechanical braking device according to claim 2, characterized in that, The first cover plate includes a first receiving groove and a second receiving groove, the first receiving groove being used to receive the motor controller, and the second receiving groove being used to receive a portion of the transmission gear assembly, wherein: Along the axial direction of the brake motor, the opening of the first receiving groove faces away from the motor housing, and the opening of the second receiving groove faces the motor housing.

4. The electromechanical braking device according to claim 3, characterized in that, The first cover plate includes an axial partition, which includes a first plane and a second plane facing away from each other along the axial direction of the brake motor. The first plane is used to form a portion of the bottom of the first receiving groove, and the second plane is used to form a portion of the bottom of the second receiving groove.

5. The electromechanical braking device according to claim 4, characterized in that, The motor controller includes a circuit board for fixing a position sensor chip. The axial partition includes a first through hole that extends through the axial partition along the axial direction of the brake motor, wherein: The first through hole is used to partially accommodate a magnetic ring, which is used to drive the motor shaft of the brake motor. The projection of the magnetic ring on the circuit board along the axial direction of the brake motor partially overlaps with the sensing chip. The first plane is used to fix an oil-blocking film, which is used to shield the first through hole.

6. The electromechanical braking device according to claim 5, characterized in that, The axial partition includes a second through hole and a third through hole. The second and third through holes respectively penetrate the axial partition along the axial direction of the brake motor. The second and third through holes are positioned on either side of the first through hole along a direction perpendicular to the arrangement of the motor shaft and the transmission gear assembly. The second through hole is used to avoid the three-phase copper busbar of the electromechanical braking device. The three-phase copper busbar is used to electrically connect the motor controller and the stator of the brake motor. The motor controller is used to send a drive signal to the brake motor through the three-phase copper busbar. The third through hole is used to avoid the pressure sensor transmission line of the electromechanical braking device. The pressure sensor transmission line is used to electrically connect the motor controller and a pressure sensor. The pressure sensor is used to detect the pressure formed by the friction pad on the brake disc.

7. The electromechanical braking device according to claim 4, characterized in that, The first cover plate includes a first base plate and a second base plate. Along the direction in which the motor shaft and the transmission gear assembly are arranged, the first base plate and the second base plate are positioned on either side of the axial partition. The first base plate forms another portion of the bottom of the first receiving groove, and the second base plate forms another portion of the bottom of the second receiving groove. Wherein: Along the axial direction of the brake motor, the stator, the first base plate, the axial partition plate, and the second base plate of the brake motor are arranged in sequence at intervals.

8. The electromechanical braking device according to claim 7, characterized in that, The first base plate includes a fourth through hole, which is used to avoid the signal terminals of the electromechanical braking device, wherein: Along the axial direction of the brake motor, the fourth through hole penetrates the first base plate. One end of the signal terminal is used to electrically connect to the circuit board of the motor controller, and the other end of the signal terminal is used to extend out of the housing of the electromechanical braking device and electrically connect to an external transmission line.

9. The electromechanical braking device according to claim 7, characterized in that, Along the axial direction of the brake motor: The opening of the first receiving groove includes a first mounting surface, which is used to attach and fix the second cover plate together. The second base plate includes an outer surface facing away from the stator, and the distance between the outer surface and the stator is greater than the distance between the first mounting surface and the stator.

10. The electromechanical braking device according to any one of claims 3-9, characterized in that, The first cover plate includes a radial partition. Along the direction of the alignment of the motor shaft and the input gear of the transmission gear assembly, the radial partition includes a first sidewall and a second sidewall facing away from each other. The first sidewall is used to form a portion of the groove wall of the first receiving groove, and the second sidewall is used to form a portion of the groove wall of the second receiving groove.

11. The electromechanical braking device according to claim 10, characterized in that, The first sidewall includes a protruding structure that extends toward the center of the first receiving groove along the direction of the motor shaft and the input gear arrangement. The protruding structure is used to form a first bearing receiving groove. Along the axial direction of the brake motor, the opening of the first bearing receiving groove faces the stator of the brake motor and communicates with the second receiving groove. The first bearing receiving groove is used to accommodate and fix a bearing of the transmission gear assembly.

12. The electromechanical braking device according to claim 1, characterized in that, The electromechanical braking device includes a third cover plate, which is used to seal the side of the motor housing away from the first cover plate. The third cover plate, the stator of the brake motor, and the first cover plate are arranged at intervals along the axial direction of the brake motor.

13. The electromechanical braking device according to claim 12, characterized in that, The motor housing includes a partition plate, which is arranged along the axial direction of the brake motor on the side of the stator of the brake motor opposite to the third cover plate. A section of the motor shaft of the brake motor passes through the partition plate and extends into the cavity of the transmission gear assembly, wherein: The partition plate includes a second bearing receiving groove, with the opening of the second bearing receiving groove facing the stator along the axial direction of the brake motor. The second bearing receiving groove is used to fix the outer ring of the motor bearing, and the inner ring of the motor bearing is fixed to the middle section of the motor shaft. The bottom of the second bearing receiving groove includes a fifth through hole, which is used to avoid a section of the motor shaft, and the diameter of the fifth through hole is larger than the outer diameter of the section of the motor shaft.

14. The electromechanical braking device according to claim 13, characterized in that, The outer peripheral surface of a section of the motor shaft includes meshing teeth, which are used to mesh with the input gear of the transmission gear assembly to output braking force along the radial direction of the brake motor.

15. A vehicle, characterized in that, The vehicle includes wheels and an electromechanical braking device as described in any one of claims 1-14, the electromechanical braking device being fixed to the vehicle frame and used to brake the brake discs of the wheels.

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