An electromechanical brake driving device and electromechanical brake

Abstract

The utility model discloses an electronic mechanical brake drive arrangement, include: non -metallic shell, integrated wiring harness interface, cover, cover is located in non -metallic shell to form the installation cavity, reduction gear train, be located in the installation cavity, motor, be located in non -metallic shell outside, and the motor includes output shaft, the motor gear of being located in output shaft and motor power supply interface, and the motor gear is located in the installation cavity, and transmission connection with reduction gear train, circuit board, be located in the installation cavity, and wiring harness interface and motor power supply interface all with circuit board electricity is connected. The utility model can integrate reduction gear train, motor, circuit board and wiring harness interface in non -metallic shell, simple structure, and can nimblely arrange the position of wiring harness interface, can satisfy more user demand. The utility model still provides an electronic mechanical brake.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and in particular to an electromechanical brake drive device and an electromechanical brake. Background Technology

[0002] An electromechanical brake (EMB) actuator is a device used to perform braking actions in automobiles. The EMB actuator requires a rapid response and includes a controller box and a gearbox. The gearbox houses a reduction gear system, while the controller box integrates power and signal wiring harness interfaces and contains a printed circuit board assembly (PCBA). The controller box with the PCB controls the motor, and the motor and reduction gear system work together to drive the vehicle's braking system, thus achieving braking.

[0003] The controller box and gearbox are typically separate units, and they are made of different materials. The gearbox housing is usually made of aluminum alloy, while the controller box is typically made of plastic. Furthermore, rubber is used between the controller box and gearbox to isolate them from the outside environment, providing a seal. Integrating these two separately constructed units requires additional positioning, sealing, and fastening structures, resulting in a complex brake drive mechanism and higher costs. Utility Model Content

[0004] The purpose of this invention is to solve the problems of high integration cost and complex structure of controller box and gearbox. This invention provides an electromechanical brake drive device and electromechanical brake, which integrates the circuit board, wiring harness interface and reduction gear system inside a non-metallic housing, resulting in fewer parts and a simpler structure for the drive device.

[0005] To solve the above-mentioned technical problems, an embodiment of this utility model discloses an electromechanical brake drive device, comprising:

[0006] Non-metallic housing with integrated wiring harness interface;

[0007] A cover is provided on the non-metallic shell to form an installation cavity;

[0008] A reduction gear system is disposed within the mounting cavity;

[0009] The motor is located outside the non-metallic housing. The motor includes an output shaft, a motor gear located on the output shaft, and a motor power interface. The motor gear is located inside the mounting cavity and is connected to the reduction gear system for transmission.

[0010] A circuit board is disposed within the mounting cavity, and both the wiring harness interface and the motor power interface are electrically connected to the circuit board.

[0011] By adopting the above technical solution, the wiring harness interface is integrated into the non-metallic housing, and the circuit board and reduction gear system are located in the mounting cavity between the non-metallic housing and the cover. The wiring harness interface is electrically connected to the circuit board to realize signal transmission to the circuit board. Since the circuit board and the reduction gear system are integrated together, the assembly parts between the circuit board and the reduction gear system can be reduced, thereby reducing the number of assembly parts, simplifying the structure of the drive device, and reducing costs.

[0012] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed, which further includes a support plate. The mounting cavity includes an upper cavity and a lower cavity. The support plate and the cover define the upper cavity, and the support plate and the non-metallic shell define the lower cavity. The circuit board is disposed in the upper cavity, and the motor gear and the reduction gear system are both disposed in the lower cavity.

[0013] By adopting the above technical solution, the circuit board and the reduction gear system are respectively placed in the upper cavity and the lower cavity, so that the support plate isolates the circuit board and the reduction gear system. This is because the reduction gear system is prone to producing grease during operation, and the support plate can prevent the grease from contacting the circuit board, thereby preventing the circuit board from malfunctioning.

[0014] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed, which further includes: a first copper busbar and a second copper busbar, both of which are disposed in the lower cavity; the circuit board is provided with a first copper busbar connector and a second copper busbar connector; one end of the first copper busbar is connected to a pin in the motor power interface, and the other end passes through the support plate and is connected to the first copper busbar connector; one end of the second copper busbar is connected to a pin in the wire harness interface, and the other end passes through the support plate and is connected to the second copper busbar connector.

[0015] Using the above technical solution, the motor power interface connects to the first copper busbar connector on the circuit board via the first copper busbar, enabling the circuit board to control the motor; the wiring harness interface connects to the second copper busbar connector on the circuit board via the second copper busbar, enabling signal transmission to the circuit board. Because of the first and second copper busbars, neither the motor power interface nor the wiring harness interface needs to be directly plugged into the circuit board. The wiring harness interface contains PCBA input power and signal lines, which are then converted by the second copper busbar before being connected to the circuit board. Therefore, the motor power interface and wiring harness interface can be flexibly arranged, no longer limited by the circuit board's location.

[0016] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed, wherein the cover is welded to the non-metallic housing.

[0017] Using the above technical solution, the cover is directly welded to the non-metallic shell, eliminating the need for a rubber sealing ring, which reduces the number of parts and lowers costs.

[0018] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed, wherein the reduction gear system includes a planetary gear system and a reduction gear unit, and the motor gear, the reduction gear unit and the planetary gear system mesh and transmit power in sequence.

[0019] By adopting the above technical solution, the rotation of the motor output shaft is transmitted to the planetary gear train through the sequential meshing of the motor gear with the transmission reduction gear unit and the planetary gear train. The structure between each gear is compact, making full use of the internal space of the non-metallic housing.

[0020] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed. The planetary gear system includes a sun gear unit, planet gears, a planet carrier, and an external gear ring. The external gear ring is injection molded in the non-metallic housing. The planet gears are disposed on the planet carrier and are located inside the external gear ring. The planet gears are meshed between the sun gear unit and the external gear ring. The sun gear unit and the reduction gear unit mesh and drive each other.

[0021] Using the above technical solution, the external gear ring is injection molded into a non-metallic housing. The rotation of the motor output shaft is transmitted to the sun gear unit through the reduction gear unit. Since the external gear ring is fixed, the planetary gears rotate on their own axis and revolve around the sun gear unit in the external gear ring under the drive of the sun gear unit. The revolution of the planetary gears drives the planet carrier to rotate on its own axis.

[0022] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electromechanical brake drive device, wherein the reduction gear unit includes a gear shaft, and a first central gear, or a second central gear and a third central gear are sleeved on the outer periphery of the gear shaft;

[0023] When a first central gear is fitted around the outer periphery of the gear shaft, the first central gear meshes between the motor gear and the sun gear unit;

[0024] When the second central gear and the third central gear are sleeved on the outer periphery of the gear shaft, the second central gear and the third central gear are coaxially connected, the second central gear meshes with the motor gear for transmission, and the third central gear meshes with the sun gear unit for transmission.

[0025] Using the above technical solution, when the first central gear is used, the motor gear, the first central gear, the sun gear unit, and the planetary gear mesh and drive in sequence to achieve two-stage transmission; when the second central gear and the third central gear are used, the motor gear and the sun gear unit mesh and drive with the second central gear and the third central gear in sequence, respectively, and the sun gear unit then meshes and drives with the planetary gear to achieve three-stage transmission.

[0026] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed. A pressure plate is connected inside the non-metallic housing. The sun gear unit includes a sun gear and a drive wheel. The sun gear and the drive wheel are coaxially connected. The drive wheel meshes with the reduction gear unit for transmission. The sun gear passes through the pressure plate and meshes with the planetary gears for transmission.

[0027] Using the above technical solution, the sun gear unit is connected to the non-metallic housing through a pressure plate. The pressure plate can support the sun gear unit. Through the coaxial connection of the sun gear and the drive wheel, the rotation of the reduction gear unit can be transmitted to the planetary gears.

[0028] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed, wherein the planetary carrier is provided with a spline, and the spline extends out of the non-metallic housing and is connected to a clamping device in the electromechanical brake system.

[0029] Using the above technical solution, the rotation of the planetary carrier and spline can be converted into linear motion by the clamping device and acted on the car caliper to achieve car braking.

[0030] According to another specific embodiment of the present invention, an electromechanical brake drive device is disclosed, wherein the non-metallic housing and the cover are both made of plastic.

[0031] By adopting the above technical solution, both the non-metallic shell and the cover are made of plastic, which can reduce the overall weight of the actuator and save costs.

[0032] The present invention also discloses an electromechanical brake, which includes at least the electromechanical brake drive device in any of the above embodiments, and a clamping device; the reduction gear system and the clamping device are connected.

[0033] By adopting the above technical solution, the clamping device can convert the rotation of the reduction gear system into linear motion and act on the car caliper to achieve car braking. Attached Figure Description

[0034] Figure 1This is a top perspective view of the assembled electromechanical brake drive device provided in the embodiment of this application.

[0035] Figure 2 A schematic diagram of the mounting cavity inside the electromechanical brake drive device provided in an embodiment of this application is shown.

[0036] Figure 3 An exploded view of the electromechanical brake drive device provided in an embodiment of this application is shown.

[0037] Figure 4 The image shown is a bottom-view perspective view of the assembled electromechanical brake drive device provided in the embodiment of this application.

[0038] Figure 5 A top view of the non-metallic casing provided in an embodiment of this application is shown.

[0039] Figure 6 A bottom view of the cover provided in an embodiment of this application is shown.

[0040] Figure 7 A schematic diagram of a non-metallic shell equipped with a support plate is shown in an embodiment of this application.

[0041] Figure 8 A three-dimensional schematic diagram of a non-metallic housing equipped with a circuit board is shown in an embodiment of this application.

[0042] Figure 9 A top view of a non-metallic housing with a circuit board mounted according to an embodiment of this application is shown.

[0043] Figure 10 A schematic diagram of a copper busbar provided in an embodiment of this application is shown.

[0044] Figure 11 A schematic diagram of a non-metallic housing equipped with a reduction gear system is shown in an embodiment of this application.

[0045] Figure 12 A schematic diagram of a two-stage transmission reduction gear system provided in an embodiment of this application is shown.

[0046] Figure 13 A schematic diagram of a three-stage transmission reduction gear system provided in an embodiment of this application is shown.

[0047] Figure 14 A bottom view of the support plate provided in an embodiment of this application is shown.

[0048] Figure 15 A bottom view of the caliper in the electromechanical brake provided in an embodiment of this application is shown.

[0049] Figure 16A schematic diagram of the assembly of the caliper and the electromechanical brake drive device in the electromechanical brake provided in the embodiment of this application is shown. Detailed Implementation

[0050] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0051] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0053] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0054] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0055] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0056] refer to Figures 1-5 This application provides an electromechanical brake drive device, including a non-metallic housing 10, a reduction gear system 20, a motor 30, a support plate 40, a circuit board 50, and a cover 60.

[0057] The cover 60 is welded vertically to the upper surface of the non-metallic housing 10. Welding methods include full welding, spot welding, and segment welding, but are not limited to these. Both the non-metallic housing 10 and the cover 60 are made of plastic. The plastic cover 60 and the non-metallic housing 10 constitute the outer shell structure of the electromechanical brake drive device. A mounting cavity 70 is formed between the cover 60 and the non-metallic housing 10. A support plate 40 is installed inside the mounting cavity 70. The support plate 40 is made of aluminum alloy or plastic, but is not limited to these materials. If the support plate 40 is made of plastic, the overall weight of the actuator can be reduced, saving costs. If the support plate 40 is made of aluminum alloy, the aluminum alloy support plate 40 can be used to dissipate heat from the circuit board 50. The support plate 40 is connected to the non-metallic housing 10 by screws. The support plate 40 divides the mounting cavity 70 into an upper cavity 71 and a lower cavity 72. The support plate 40 and the cover 60 define the upper cavity 71, and the support plate 40 and the non-metallic housing 10 define the lower cavity 72. The circuit board 50 is installed inside the upper cavity 71. (Refer to...) Figure 6 The circuit board 50 is encapsulated by the cover 60 to protect it. A reduction gear system 20 is provided inside the lower cavity 72.

[0058] It should be noted that the reduction gear system 20, the support plate 40, and the circuit board 50 are arranged sequentially from bottom to top. The circuit board 50 and the reduction gear system 20 are isolated by the support plate 40, which can prevent the grease generated during the movement of the reduction gear system 20 from coming into contact with the circuit board 50, thereby preventing the circuit board 50 from malfunctioning.

[0059] The motor 30 includes a housing, an output shaft, a motor gear 31 mounted on the output shaft, and a motor power interface 33. The housing of the motor 30 is bolted to the non-metallic housing 10. The motor gear 31 is located in the lower cavity 72 and is connected to the reduction gear system 20 for transmission. A magnet 32 ​​for detecting the position of the motor 30 is provided on the motor 30.

[0060] It should be noted that motor 30 is a brushless motor, but it is not limited to this and other motors can also be used.

[0061] In this embodiment, the reduction gear system 20, the motor gear 31 of the motor 30, and the circuit board 50 are all integrated in the mounting cavity 70 between the cover 60 and the non-metallic housing 10. Both the cover 60 and the non-metallic housing 10 are made of plastic material. The cover 60 and the non-metallic housing 10 are fused together by welding. The welding can be laser welding or friction welding, but is not limited to these. Other welding methods can also be used. The rubber sealing rings at various positions of the housing structure are eliminated, reducing the number of assembly parts, simplifying the structure, and reducing costs.

[0062] refer to Figures 7-9 The non-metallic housing 10 has a wire harness interface 11, a first copper busbar 12, and a second copper busbar 13 on its side wall. The first copper busbar 12 and the second copper busbar 13 are both located in the lower cavity 72. The wire harness interface 11 is arranged in the horizontal direction, and the first copper busbar 12 and the second copper busbar 13 are arranged in the vertical direction. The circuit board 50 has a first copper busbar connector 51 and a second copper busbar connector 52. One end of the first copper busbar 12 is connected to the pin in the motor power interface 33, and the other end passes through the support plate 40 and is connected to the first copper busbar connector 51. One end of the second copper busbar 13 is connected to the pin in the wire harness interface 11, and the other end passes through the support plate 40 and is connected to the second copper busbar connector 52.

[0063] The motor power interface 33 is connected to the circuit board 50 via the first copper busbar 12 to enable the circuit board 50 to control the motor 30. The wiring harness interface 11 contains a PCBA input power line and a signal line. The PCBA input power line is connected to the circuit board 50 to supply power, and the signal line is connected to the circuit board 50 to transmit signals. The first copper busbar 12 is used to transfer the power supply of the motor 30 to a suitable position before connecting it to the circuit board 50, and the second copper busbar 13 is used to transfer the wiring harness interface 11 to a suitable position before connecting it to the circuit board 50, so that the positions of the motor power interface 33 and the wiring harness interface 11 can be flexibly adjusted according to actual needs.

[0064] In this embodiment, the outer periphery of the support plate 40 has a clearance area through which the first copper busbar 12 and the second copper busbar 13 pass and connect to the circuit board 50. In other embodiments, the support plate 40 is provided with through holes for the first copper busbar 12 and the second copper busbar 13 to pass through, that is, the first copper busbar 12 and the second copper busbar 13 pass through the through holes in the support plate 40 and connect to the circuit board 50. (See reference...) Figure 10 The number of the first copper busbar 12 and the second copper busbar 13 is not limited and can be adjusted according to actual needs.

[0065] In this embodiment, the non-metallic housing 10 is the main housing. The non-metallic housing 10 integrates a first copper busbar 12 and a second copper busbar 13. The first copper busbar 12 and the second copper busbar 13 respectively connect the motor power interface 33 and the wiring harness interface 11 to suitable positions and directly connect to the circuit board 50. The wiring harness interface 11 is directly injection molded onto the non-metallic housing 10, and its position is not limited to... Figure 1 The specific location shown can be adjusted according to customer needs.

[0066] refer to Figure 11 The reduction gear system 20 includes a planetary gear system 22 and a reduction gear unit 21. The motor gear 31, the reduction gear unit 21 and the planetary gear system 22 on the output shaft of the motor 30 mesh in sequence, thereby transmitting the rotation of the output shaft of the motor 30 to the planetary gear system 22.

[0067] Specifically, the reduction gear unit 21 includes two transmission modes: a two-stage transmission mode and a three-stage transmission mode.

[0068] refer to Figure 12 When the reduction gear unit 21 adopts a two-stage transmission mode, the reduction gear unit 21 includes a gear shaft 211, a first bearing 212, and a first central gear 215. The gear shaft 211 is fixed between the support plate 40 and the non-metallic housing 10. The first bearing 212 is sleeved on the outer periphery of the gear shaft 211, and the first central gear 215 is arranged on the outer periphery of the first bearing 212, so that the first central gear 215 can rotate relative to the gear shaft 211. The first central gear 215 meshes between the motor gear 31 and the sun gear unit 221. The rotation of the motor gear 31 is transmitted sequentially to the first central gear 215, the sun gear unit 221, and the planetary gears 222, thereby realizing two-stage transmission.

[0069] refer to Figure 13 When the reduction gear unit 21 adopts a three-stage transmission mode, the reduction gear unit 21 includes a gear shaft 211, a first bearing 212, a second central gear 213, and a third central gear 214. The gear shaft 211 is fixed between the support plate 40 and the non-metallic housing 10. The first bearing 212 is sleeved on the outer periphery of the gear shaft 211. The second central gear 213 and the third central gear 214 are arranged on the outer periphery of the first bearing 212, so that the second central gear 213 and the third central gear 214 can rotate relative to the gear shaft 211. The second central gear 213 and the third central gear 214 are coaxially connected. The third central gear 214 is arranged on the second central gear 213, and the size of the third central gear 214 is smaller than that of the second central gear 213. The second central gear 213 meshes with the motor gear 31, and the third central gear 214 meshes with the sun gear unit 221. The rotation of the motor gear 31 is transmitted sequentially to the second central gear 213, the third central gear 214, the sun gear unit 221, and the planetary gears 222, thereby realizing three-stage transmission.

[0070] refer to Figure 14 It should be noted that the reduction gear unit 21 adopts a fixed shaft structure. Specifically, the support plate 40 is provided with a through hole 41, the top end of the gear shaft 211 is located at the through hole 41, and the bottom end of the gear shaft 211 is connected to the non-metallic housing 10, so that the gear shaft 211 is limited by the support plate 40 and the non-metallic housing 10.

[0071] The planetary gear train 22 includes a sun gear unit 221, planet gears 222, a planet carrier 223, and an external gear ring 224. The sun gear unit 221 consists of a sun gear 2211 and a drive gear 2212, which are coaxially connected. The external gear ring 224 is injection molded within a non-metallic housing 10. Multiple planet gears 222 are disposed on the upper surface of the planet carrier 223. The number of planet gears 222 can be three, four, or five, but is not limited to these. The planet gears 222 are located within the external gear ring 224, and are meshed between the sun gear 2211 and the external gear ring 224. (Motor gear 31) The reduction gear unit 21 and the drive wheel 2212 mesh and transmit power in sequence. The drive wheel 2212 then drives the sun gear 2211 to rotate. Since the outer gear ring 224 is fixed, the planet gear 222 rotates on its own axis and revolves around the sun gear 2211 in the outer gear ring 224 under the drive of the sun gear 2211. The revolution of the planet gear 222 drives the planet carrier 223 to rotate on its own axis. The lower surface of the planet carrier 223 is provided with a spline 227. The clamping device 80 in the electromechanical braking system is provided with a spline interface 81 that matches the spline 227, so that the spline 227 can extend out of the non-metallic housing 10 and connect with the clamping device 80 in the electromechanical braking system.

[0072] In some embodiments, a pressure plate 225 is connected inside the non-metallic housing 10, and a second bearing 226 is connected between the pressure plate 225 and the drive wheel 2212, so that the drive wheel 2212 can rotate relative to the pressure plate 225 and the non-metallic housing 10.

[0073] refer to Figures 15-16 The electromechanical brake drive device of this application can be applied to an electromechanical brake. The electromechanical brake includes an electromechanical brake drive device and a clamping device 80. The spline 227 on the planetary carrier 223 is connected to the spline interface 81 on the clamping device 80. The clamping device 80 can convert the rotation output by the planetary carrier 223 into a linear pushing force acting on the car caliper to achieve the braking of the car caliper.

[0074] The principle by which this application achieves braking of automotive caliper brakes is as follows:

[0075] Circuit board 50 controls the output shaft of motor 30 to rotate. The output shaft of motor 30 drives the motor gear 31 mounted on it to move. The motor gear 31 meshes with the drive wheel 2212 through the reduction gear unit 21, which in turn drives the sun gear 2211, which is coaxial with the drive wheel 2212, to rotate. Since the outer gear ring 224 is fixed in the non-metallic housing 10, the planet gear 222 rotates on its own axis and revolves around the sun gear 2211 under the drive of the sun gear 2211. The revolution of the planet gear 222 drives the planet carrier 223 to rotate. The clamping device 80 converts the rotation of the planet gear 222 into linear thrust, which acts on the car caliper to finally achieve braking.

[0076] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electromechanical brake drive device, characterized in that, include: Non-metallic housing with integrated wiring harness interface; A cover is provided on the non-metallic shell to form an installation cavity; A reduction gear system is disposed within the mounting cavity; The motor is located outside the non-metallic housing. The motor includes an output shaft, a motor gear located on the output shaft, and a motor power interface. The motor gear is located inside the mounting cavity and is connected to the reduction gear system for transmission. A circuit board is disposed within the mounting cavity, and both the wiring harness interface and the motor power interface are electrically connected to the circuit board.

2. The electromechanical brake drive device as described in claim 1, characterized in that, It also includes a support plate, and the mounting cavity includes an upper cavity and a lower cavity; wherein, the support plate and the cover define the upper cavity, the support plate and the non-metallic shell define the lower cavity, the circuit board is disposed in the upper cavity, and the motor gear and the reduction gear system are both disposed in the lower cavity.

3. The electromechanical brake drive device as described in claim 2, characterized in that, It also includes: a first copper busbar and a second copper busbar, both of which are located in the lower cavity; the circuit board is provided with a first copper busbar connector and a second copper busbar connector; one end of the first copper busbar is connected to a pin in the motor power interface, and the other end passes through the support plate and is connected to the first copper busbar connector; one end of the second copper busbar is connected to a pin in the wire harness interface, and the other end passes through the support plate and is connected to the second copper busbar connector.

4. The electromechanical brake drive device as described in claim 1, characterized in that, The cover is welded to the non-metallic shell.

5. The electromechanical brake drive device as described in claim 1, characterized in that, The reduction gear system includes a planetary gear system and a reduction gear unit, and the motor gear, the reduction gear unit, and the planetary gear system mesh and transmit power in sequence.

6. The electromechanical brake drive device as described in claim 5, characterized in that, The planetary gear train includes a sun gear unit, planet gears, a planet carrier, and an external gear ring. The external gear ring is injection molded inside the non-metallic housing. The planet gears are disposed on the planet carrier and are located inside the external gear ring. The planet gears are meshed between the sun gear unit and the external gear ring. The sun gear unit and the reduction gear unit mesh for transmission.

7. The electromechanical brake drive device as described in claim 6, characterized in that, The reduction gear unit includes a gear shaft, and a first central gear, or a second central gear and a third central gear are sleeved on the outer periphery of the gear shaft; When a first central gear is fitted around the outer periphery of the gear shaft, the first central gear meshes between the motor gear and the sun gear unit; When the second central gear and the third central gear are sleeved on the outer periphery of the gear shaft, the second central gear and the third central gear are coaxially connected, the second central gear meshes with the motor gear for transmission, and the third central gear meshes with the sun gear unit for transmission.

8. The electromechanical brake drive device as described in claim 6, characterized in that, A pressure plate is connected inside the non-metallic housing. The sun gear unit includes a sun gear and a drive gear. The sun gear and the drive gear are coaxially connected. The drive gear meshes with the reduction gear unit for transmission. The sun gear passes through the pressure plate and meshes with the planetary gears for transmission.

9. The electromechanical brake drive device as described in claim 6, characterized in that, The planetary carrier is provided with a spline, which extends out of the non-metallic housing and connects to the clamping device in the electromechanical braking system.

10. The electromechanical brake drive device as described in claim 1, characterized in that, Both the non-metallic shell and the cover are made of plastic.

11. An electromechanical brake, characterized in that, It includes an electromechanical brake drive device as described in any one of claims 1-10, and a clamping device; the reduction gear system and the clamping device are connected.

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