Brake execution device, brake system and vehicle

Abstract

The utility model provides a brake execution device, a brake system and a vehicle, and relates to the technical field of drive-by-wire brake, the brake execution device comprises a machine shell, a circuit board, a motor assembly and a drive-by-wire assembly, and the machine shell is provided with a containing cavity and an output port communicating with the containing cavity; the circuit board, the motor assembly and the drive-by-wire assembly are all installed in the containing cavity, the circuit board extends in the first direction, the motor assembly and the drive-by-wire assembly are arranged at intervals in the first direction and located on the same side of the circuit board in the thickness direction of the circuit board, and the motor assembly and the drive-by-wire assembly are each provided with a first end and a second end which are oppositely arranged; the second end of each of the motor assembly and the drive-by-wire assembly is closer to the circuit board relative to the corresponding first end, the first end of the motor assembly is in transmission connection with the drive-by-wire assembly through the speed reduction assembly, at least part of the first end of the drive-by-wire assembly is in sliding fit with the output port, and the second end of the motor assembly is electrically connected with the circuit board. The overall structure size is small, and the integration degree is high.

Description

Technical Field

[0001] The present application relates to the technical field of wire-controlled braking, and in particular to a brake actuator, a brake system and a vehicle. Background Art

[0002] As the intelligence and safety levels of smart driving continue to improve, the demand for smart braking systems has also changed. The demand for wire-controlled braking in vehicle systems is increasing. Among them, the mainstream wire-controlled braking systems are mainly Onebox and Twobox, both of which are hydraulic braking systems. Hydraulic pipelines are required to connect the brake actuator and the brake caliper, which is inconvenient for the overall vehicle layout. At the same time, the environmental pollution problem of brake fluid has always existed.

[0003] In order to solve the above problems, an electronic mechanical brake actuator has been proposed in the related art. However, in actual use, it still has shortcomings such as a large overall structural size. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of one aspect of the utility model provides a brake actuator, which has a small overall structural size and a high degree of integration.

[0006] Another aspect of the present invention provides a braking system.

[0007] Another aspect of the present invention provides a vehicle.

[0008] According to an embodiment of the utility model, a brake actuator includes a housing, a circuit board, a motor assembly and a wire control assembly, the housing having a housing cavity and an output port connected to the housing cavity; the circuit board, the motor assembly and the wire control assembly are all installed in the housing cavity, the circuit board extends along a first direction, the motor assembly and the wire control assembly are spaced apart along the first direction and are located on the same side of the circuit board in the thickness direction of the circuit board, the motor assembly and the wire control assembly each have a first end and a second end arranged oppositely, the second end of each of the motor assembly and the wire control assembly is closer to the circuit board than the corresponding first end, the first end of the motor assembly is transmission-connected to the wire control assembly through a deceleration assembly, at least a portion of the first end of the wire control assembly is slidably fitted in the output port, and the second end of the motor assembly is electrically connected to the circuit board.

[0009] According to the brake actuator of the embodiment of the utility model, the motor assembly and the wire control assembly are arranged at intervals along the first direction on the same side of the circuit board, and the end of the motor assembly adjacent to the circuit board is electrically connected to the circuit board, and the other end thereof is transmitted through the deceleration assembly and the wire control assembly. The motor assembly, the wire control assembly and the circuit board are arranged compactly in the accommodating cavity, thereby improving the integration of the entire device and saving space. Therefore, compared with the related art, the brake actuator in the present application has a smaller overall structural size and a higher integration.

[0010] In some embodiments, the brake actuator further includes a force sensor, which is located between the second end of the wire control assembly and the circuit board and connected to the second end of the wire control assembly, and the end of the force sensor facing away from the wire control assembly is electrically connected to the circuit board.

[0011] In some embodiments, the brake actuator further includes an elastic pin, wherein the elastic pin is located between the force sensor and the circuit board and is electrically connected to the force sensor and the circuit board respectively.

[0012] In some embodiments, the motor assembly includes a rotor, a motor body and a motor housing which are sequentially arranged from the inside to the outside, and the rotor and the motor body each have a first end and a second end arranged relatively to each other along the thickness direction of the circuit board, and the second end of each of the rotor and the motor body is closer to the circuit board than the corresponding first end, the first end of the rotor extends out of the motor housing and is transmission-connected to the reduction assembly through a motor gear, and the second end of the motor body is electrically connected to the circuit board through a motor pin.

[0013] In some embodiments, the second end of the rotor extends out of the motor housing;

[0014] The brake actuator also includes a motor position sensor, which includes a TMR pole and a TMR chip. The TMR pole is installed at the second end of the rotor, and the TMR chip is connected to the circuit board and corresponds to the TMR pole interval in the thickness direction of the circuit board.

[0015] In some embodiments, the housing includes a first shell and a second shell which are connected in sequence and define the accommodating cavity, the output port is formed on the first shell, and the circuit board is located in the second shell.

[0016] In some embodiments, the wire control assembly includes a nut gear, a piston and a ball screw. The nut gear is pivotally mounted in the accommodating cavity and has a sliding channel extending along the thickness direction of the circuit board. The nut gear is transmission-connected to the reduction assembly, and the part of the nut gear away from the reduction assembly is connected to the force sensor; the piston is slidingly fitted in the output port, at least a portion of the piston is connected to the first end of the ball screw, the piston is used to be connected to the caliper, and the ball screw is slidingly fitted in the sliding channel and is transmission-connected to the nut gear through a ball screw pair.

[0017] In some embodiments, the brake actuator also includes a thrust bearing and a first support block, the nut gear, the thrust bearing, the first support block and the force sensor are arranged in sequence along the thickness direction of the circuit board and any adjacent two of them are abutted against each other, the thrust bearing and the first support block are coaxial with the sliding channel, and at least a portion of the ball screw is rotatably connected to the thrust bearing or the first support block.

[0018] In some embodiments, the brake actuator further includes a needle roller bearing, which is sleeved on the nut gear and located between the nut gear and the thrust bearing in the thickness direction of the circuit board.

[0019] In some embodiments, the reduction assembly includes a ring gear, a planetary wheel, a planetary carrier, a planetary output gear and an intermediate gear. The ring gear is installed in the accommodating cavity and adjacent to the first end of the motor assembly. The planetary wheel is located between the inner circumferential surface of the ring gear and the first end of the motor assembly along the radial direction of the ring gear. The ring gear, the planetary wheel and the first end of the motor assembly are meshed and transmitted in sequence; the planetary carrier has a first end and a second end opposite to each other along the thickness direction of the circuit board, the first end of the planetary carrier and the intermediate gear can be pivotally mounted on the housing, the second end of the planetary carrier is connected to the planetary wheel, the planetary output gear is installed on the planetary carrier, and the planetary output gear, the intermediate gear and the wire control assembly are arranged along the first direction and are meshed and transmitted in sequence.

[0020] In some embodiments, the intermediate gear includes a first gear and a second gear arranged at intervals along the thickness direction of the circuit board, the first gear is meshed with the planetary output gear, the second gear is meshed with the wire control assembly, and the number of teeth of the second gear is less than the number of teeth of the first gear.

[0021] A brake system according to an embodiment of the utility model includes a caliper and a brake actuator, wherein the brake actuator is the brake actuator described in any of the above embodiments, and the first end of the wire control assembly is connected to the caliper.

[0022] According to the brake system of the embodiment of the utility model, the brake actuator is designed as a structure in which the motor component and the wire control component are arranged at intervals along the first direction on the same side of the circuit board, and the ends of the two adjacent to the circuit board are electrically connected to the circuit board, so that the overall integration of the brake actuator is high. Therefore, compared with the related technology, the overall structural size of the brake system using the brake actuator is smaller.

[0023] A vehicle according to an embodiment of the utility model comprises the brake system as described above.

[0024] According to the vehicle of the embodiment of the utility model, the overall volume of the vehicle can be reduced to a certain extent by adopting a brake system with a smaller overall structural size.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic cross-sectional structural diagram of a brake actuator according to an embodiment of the utility model.

[0027] Figure 2 It is a schematic diagram of the exploded structure of the brake actuator according to an embodiment of the utility model at a first viewing angle.

[0028] Figure 3 It is a schematic diagram of the exploded structure of the brake actuator according to an embodiment of the utility model at a second viewing angle.

[0029] Figure markings: 1. casing, 11. output port, 12. first shell, 13. second shell, 2. circuit board, 3. motor assembly, 31. rotor, 32. motor body, 33. motor shell, 34. motor gear, 35. motor pin, 4. wire control assembly, 41. nut gear, 42. piston, 43. ball screw, 44. thrust bearing, 45. first support block, 46. needle bearing, 5. reduction assembly, 51. ring gear, 52. planetary gear, 53. planetary carrier, 54. planetary output gear, 55. intermediate gear, 6. force sensor, 61. elastic pin, 7. motor position sensor, 71. TMR pole, 72. TMR chip. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0031] like Figures 1 to 3As shown, a brake actuator according to an embodiment of the utility model includes a housing 1, a circuit board 2, a motor assembly 3 and a wire control assembly 4.

[0032] The housing 1 has a receiving cavity and an output port 11 communicating with the receiving cavity.

[0033] Among them, the circuit board 2, the motor assembly 3 and the wire control assembly 4 are all installed in the accommodating cavity, the circuit board 2 extends along the first direction, the motor assembly 3 and the wire control assembly 4 are arranged at intervals along the first direction and are located on the same side of the circuit board 2 in the thickness direction of the circuit board 2, the motor assembly 3 and the wire control assembly 4 both have a first end and a second end arranged relatively, the second end of each of the motor assembly 3 and the wire control assembly 4 is closer to the circuit board 2 than the corresponding first end, the first end of the motor assembly 3 is transmission-connected to the wire control assembly 4 through the deceleration assembly 5, at least a portion of the first end of the wire control assembly 4 is slidably fitted in the output port 11, and the second end of the motor assembly 3 is electrically connected to the circuit board 2.

[0034] According to the brake actuator of the embodiment of the utility model, the motor assembly 3 and the wire control assembly 4 are arranged at intervals along the first direction on the same side of the circuit board 2, and the end of the motor assembly 3 adjacent to the circuit board 2 is electrically connected to the circuit board 2, and the other end thereof is transmitted through the deceleration assembly 5 and the wire control assembly 4. The motor assembly 3, the wire control assembly 4 and the circuit board 2 are arranged compactly in the accommodating cavity, thereby improving the integration of the entire device and saving space. Therefore, compared with the related art, the brake actuator in the present application has a smaller overall structural size and a higher integration.

[0035] Specifically, the first direction may be the height direction of the housing 1, that is, Figure 1 The up and down directions in . Figure 1 The left and right direction in the figure may be the thickness direction of the circuit board 2. The motor assembly 3 and the deceleration assembly 5 are both located above the wire control assembly 4, and the motor assembly 3 and the wire control assembly 4 are both on the left side of the circuit board 2. The first end of the motor assembly 3 corresponds to the left end of the motor assembly 3 in the figure, the first end of the wire control assembly 4 corresponds to the left end of the wire control assembly 4 in the figure, the second end of the motor assembly 3 corresponds to the right end of the motor assembly 3 in the figure, and the second end of the wire control assembly 4 corresponds to the right end of the wire control assembly 4 in the figure.

[0036] The circuit board 2 is not limited to being a PCBA board.

[0037] It can be understood that the first end of the motor assembly 3 realizes transmission of the wire control assembly 4 through the deceleration assembly 5, so that the first end of the wire control assembly 4 can slide out or retract at the output port 11, so as to brake or unlock the component to be braked by the first end of the wire control assembly 4, wherein the component to be braked is not limited to the vehicle wheel.

[0038] like Figure 1 and Figure 2As shown, in some embodiments, the brake actuator also includes a force sensor 6, which is located between the second end of the wire control component 4 and the circuit board 2 and connected to the second end of the wire control component 4, and the end of the force sensor 6 facing away from the wire control component 4 is electrically connected to the circuit board 2.

[0039] The force sensor 6 is installed between the end of the wire control component 4 adjacent to the circuit board 2 and the circuit board 2, so that the structure between the wire control component 4, the force sensor 6 and the circuit board 2 is compact, further reducing the space occupied by this part in the accommodating cavity, and the layout is more reasonable. At the same time, since the brake actuator is integrated with the force sensor 6, closed-loop control of the braking force can be achieved, making the braking control more precise and the regulation feedback timely and fast.

[0040] Specifically, the force sensor 6 is not limited to a thrust sensor. The force sensor 6 is located below the motor assembly 3 , and the left end of the force sensor 6 is connected to the right end of the wire control assembly 4 , and the right end of the force sensor 6 is electrically connected to the left side of the circuit board 2 .

[0041] It can be understood that the force sensor 6 can feed back the thrust information of the detected wire control component 4, so that the braking control system can timely adjust the working condition of the motor component 3 according to the thrust information, so that the braking actuator can complete the braking or unlocking action and realize the closed-loop control of the braking force, wherein the braking control system can adopt the existing technology in the field.

[0042] like Figure 1 and Figure 3 As shown, in some embodiments, the brake actuator also includes an elastic pin 61, which is located between the force sensor 6 and the circuit board 2, and is electrically connected to the force sensor 6 and the circuit board 2 respectively. Directly connecting the force sensor 6 to the circuit board 2 through the elastic pin 61 saves space and facilitates installation compared to the method of arranging a wiring harness to achieve the connection between the two, while also improving the signal transmission stability of this part.

[0043] Specifically, the elastic pin 61 is not limited to a spring pin, that is, a spring needle. The spring pin is installed at the right end of the force sensor 6. The force sensor 6 is connected to the PCBA through the spring pin to realize power supply and signal transmission of the force sensor 6.

[0044] like Figures 1 to 3As shown, in some embodiments, the motor assembly 3 includes a rotor 31, a motor body 32 and a motor housing 33 which are sequentially arranged from the inside to the outside. The rotor 31 and the motor body 32 both have a first end and a second end which are relatively arranged along the thickness direction of the circuit board 2. The second end of each of the rotor 31 and the motor body 32 is closer to the circuit board 2 than the corresponding first end. The first end of the rotor 31 extends out of the motor housing 33 and is transmission-connected to the reduction assembly 5 through the motor gear 34. The second end of the motor body 32 is electrically connected to the circuit board 2 through the motor pin 35.

[0045] The end of the rotor 31 adjacent to the circuit board 2 is directly electrically connected to the circuit board 2 through the motor pin 35, and the other end is transmitted to the reduction assembly 5 through the motor gear 34. This structure makes it unnecessary to arrange a wiring harness for the connection between the rotor 31 and the circuit board 2, occupies less space, is easy to install, can realize power supply to the motor assembly 3, and further improves the structural compactness of the brake actuator.

[0046] Specifically, the motor assembly 3 is not limited to the brushless motor. The first ends of the rotor 31 and the motor body 32 correspond to the left end in the figure, and the second ends correspond to the right end in the figure. The motor gear 34 is sleeved on the first end of the rotor 31 and can be connected by a key. The motor pin 35 is not limited to the three-phase pin of the motor, that is, the three-phase pin of the motor. The motor pin 35 is installed at the right end of the motor body 32, and its right end is electrically connected to the left side of the circuit board 2. In addition, the motor pin 35 is located on the outer peripheral side of the right end of the rotor 31. The outer wall surface of the motor housing 33 is connected to the housing 1.

[0047] like Figure 1 and Figure 3 As shown, in some embodiments, the second end of the rotor 31 extends out of the motor housing 33 .

[0048] In order to detect the position and speed information of the rotor 31 and cooperate with the braking control system to realize the regulation of the working condition of the motor assembly 3, the braking actuator also includes a motor position sensor 7, the motor position sensor 7 includes a TMR pole 71 and a TMR chip 72, the TMR pole 71 is installed at the second end of the rotor 31, the TMR chip 72 is connected to the circuit board 2 and is spaced correspondingly with the TMR pole 71 in the thickness direction of the circuit board 2.

[0049] Specifically, the portion of the rotor 31 extending out of the motor body 32 is also supported in the motor housing 33 by a bearing, that is, the portion of the rotor 31 extending out of the motor body 32 is connected to the motor housing 33 by a bearing to ensure that the rotor 31 rotates smoothly in the motor housing 33. The TMR pole 71 can be a TMR magnet, and the TMR pole 71 is installed at the right end of the rotor 31. The TMR chip 72 is arranged at intervals on the right side of the TMR pole 71, and the TMR chip 72 is electrically connected to the left side of the circuit board 2.

[0050] It can be understood that by arranging the force sensor 6, the power supply of the motor assembly 3 and the motor position sensor 7 on the same side of the PCBA board and connecting them to the same PCBA board, the above three do not need an intermediate adapter harness, which greatly improves the integration of the brake actuator, saves space, and enhances its connection stability. In addition, the specific structure and working principle of the TMR pole 71 and the TMR chip 72 can adopt the existing technology in the field.

[0051] like Figure 1 and Figure 2 As shown, in some embodiments, the housing 1 includes a first shell 12 and a second shell 13 which are connected in sequence and define a receiving cavity, the output port 11 is formed on the first shell 12 , and the circuit board 2 is located in the second shell 13 .

[0052] Specifically, the first shell 12 and the second shell 13 may be connected in a manner other than limited to a snap-fit ​​manner.

[0053] It can be understood that the first shell 12 and the second shell 13 are arranged along the thickness direction of the circuit board 2, that is, the first shell 12 is located on the left side of the second shell 13, and the right end of the first shell 12 is connected to the left end of the second shell 13, wherein the output port 11 is opened at the left end of the first shell 12, and the circuit board 2 is installed at the right end of the second shell 13. The housing 1 adopts a split shell design, which can facilitate the assembly of the brake actuator and has good processability.

[0054] like Figures 1 to 3 As shown, in some embodiments, the wire control assembly 4 includes a nut gear 41 , a piston 42 and a ball screw 43 .

[0055] The screw gear 41 is pivotally mounted in the accommodating cavity and has a sliding channel extending in the thickness direction of the circuit board 2, that is, the sliding channel extends in the left-right direction. The screw gear 41 is connected to the speed reduction assembly 5 in a transmission manner, and the part of the screw gear 41 away from the speed reduction assembly 5 is connected to the force sensor 6, that is, the right end of the screw gear 41 is connected to the force sensor 6.

[0056] The piston 42 is slidably fitted in the output port 11, and at least a portion of the piston 42 is connected to the first end of the ball screw 43, that is, at least a portion of the right end of the piston 42 is connected to the left end of the ball screw 43. The left end of the piston 42 is used to be connected to the caliper, and the ball screw 43 is slidably fitted in the sliding channel and is connected to the screw mother gear 41 through the ball screw pair.

[0057] The nut gear 41 is driven to rotate through the reduction assembly 5, so that the nut gear 41 can generate axial thrust to the ball screw 43 with the cooperation of the ball screw pair, and the thrust information is detected by the force sensor 6. Under the action of the axial thrust, the ball screw 43 slides out or retracts with the piston 42 at the output port 11, so that the caliper can realize the clamping braking or unlocking operation of the brake component.

[0058] Specifically, a gear may be integrally formed on the nut to form a nut gear 41 structure, wherein the gear is connected to the reduction assembly 5 in a transmission manner. The nut gear 41 is coaxially sleeved on the ball screw 43, and both are located below the reduction assembly 5. The piston 42 may be fixed to the end of the ball screw 43 in a manner other than clamping. The specific structure of the piston 42 and the connection method between the piston 42 and the caliper may adopt the existing technology in the art. The ball screw 43 extends along the thickness direction of the circuit board 2. The force sensor 6 can withstand a large axial force.

[0059] It can be understood that, by rotating the nut, the ball screw 43 is pushed to move in translation, which effectively shortens the axial dimension of the brake actuator, making the brake actuator more compact.

[0060] like Figure 1 and Figure 2 As shown, in some embodiments, the brake actuator further includes a thrust bearing 44 and a first support block 45, the screw gear 41, the thrust bearing 44, the first support block 45 and the force sensor 6 are arranged in sequence along the thickness direction of the circuit board 2 and any two adjacent ones are abutted, that is, the screw gear 41, the thrust bearing 44, the first support block 45 and the force sensor 6 are arranged in sequence from left to right. The thrust bearing 44 and the first support block 45 are coaxial with the sliding channel, at least part of the ball screw 43 is rotatably connected to the thrust bearing 44 or the first support block 45, that is, the right end of the ball screw 43 can extend to the inner ring of the thrust bearing 44 or the inner cavity of the first support block 45, and the left end of the first support block 45 is an open structure.

[0061] The thrust bearing 44 and the first support block 45 can transmit the reaction force of the axial thrust of the ball screw 43 by the screw gear 41 to the force sensor 6, so that the force sensor 6 can feed back the thrust information to the braking control system to realize closed-loop control of the braking force.

[0062] Specifically, the screw gear 41, the thrust bearing 44 and the first support block 45 may be coaxial. To facilitate the disassembly and assembly of the force sensor 6, the force sensor 6 may be clamped between the first support block 45 and the inner wall surface of the housing 1. The first support block 45 may be an end cover abutting against the thrust bearing 44, and the inner diameter of the end cover is equal to the diameter of the inner ring of the thrust bearing 44. The sliding channel, the inner ring of the thrust bearing 44 and the inner cavity of the first support block 45 may jointly define a travel channel for the ball screw 43, that is, the ball screw 43 can slide, extend or retract along the travel channel under the axial thrust of the screw gear 41.

[0063] like Figure 1 and Figure 2 As shown, in order to ensure the smooth rotation of the nut gear 41 on the housing 1, in some embodiments, the brake actuator also includes a needle bearing 46, which is sleeved on the nut gear 41 and located between the nut gear 41 and the thrust bearing 44 in the thickness direction of the circuit board 2, that is, the needle bearing 46 is located between the right end of the nut gear 41 and the left end of the thrust bearing 44, so that the nut gear 41 is positioned and supported by the ball bearing.

[0064] like Figure 1 and Figure 2 As shown, in some embodiments, the reduction assembly 5 includes a ring gear 51 , planetary gears 52 , a planetary carrier 53 , a planetary output gear 54 and an intermediate gear 55 .

[0065] The ring gear 51 is installed in the accommodating cavity and adjacent to the first end of the motor assembly 3, that is, the ring gear 51 is installed at the left end of the motor assembly 3. The planetary gear 52 is located between the inner circumferential surface of the ring gear 51 and the first end of the motor assembly 3 along the radial direction of the ring gear 51, and the ring gear 51, the planetary gear 52 and the first end of the motor assembly 3 are meshed and driven in sequence.

[0066] The planet carrier 53 has a first end and a second end opposite to each other along the thickness direction of the circuit board 2. The first end of the planet carrier 53 corresponds to the left end of the planet carrier 53 in the figure, and the second end of the planet carrier 53 corresponds to the right end of the planet carrier 53 in the figure. The first end of the planet carrier 53 and the intermediate gear 55 can be pivotally mounted on the housing 1, the second end of the planet carrier 53 is connected to the planetary gear 52, the planetary output gear 54 is mounted on the planet carrier 53, the planetary output gear 54, the intermediate gear 55 and the wire control assembly 4 are arranged along the first direction and meshed and driven in sequence, that is, the planetary output gear 54, the intermediate gear 55 and the wire control assembly 4 are arranged in sequence from top to bottom.

[0067] Specifically, the planetary gear 52 is meshed with the motor gear 34 of the motor assembly 3 for transmission. The planetary output gear 54 can be integrally formed on the planetary carrier 53. The intermediate gear 55 is meshed with the screw gear 41 of the wire control assembly 4 for transmission.

[0068] It can be understood that the motor gear 34 of the motor assembly 3 is used as a sun gear, meshing with the planetary gear 52, and transmitting the torque to the planetary output gear 54 through the planetary carrier 53, so as to further transmit the torque to the screw gear 41 through the intermediate gear 55, thereby driving the screw gear 41 to rotate, and realizing the motion control of the wire control assembly 4. Among them, the motor gear 34, the ring gear 51, the planetary gear 52 and the planetary carrier 53 form a planetary gear mechanism, and the planetary gear mechanism can be a single-stage or two-stage planetary gear mechanism, which is specifically designed according to actual needs.

[0069] like Figure 1 and Figure 2 As shown, in some embodiments, the intermediate gear 55 includes a first gear and a second gear arranged at intervals along the thickness direction of the circuit board 2, that is, the first gear and the second gear are arranged along the left and right directions, the first gear is meshed with the planetary output gear 54, and the second gear is meshed with the wire control component 4. The first gear is located on the left side of the second gear, and the number of teeth of the second gear is less than the number of teeth of the first gear.

[0070] Specifically, the first gear and the second gear may be coaxially arranged.

[0071] It can be understood that the deceleration and torque-increasing effect of the motor assembly 3 is achieved by cooperating with the two-stage gear transmission and the one-stage or two-stage planetary gear mechanism. At the same time, the matching of different powers of the motor assembly 3 with different transmission speed ratios can achieve a larger range of braking force adjustment, that is, the transmission speed ratio between the motor assembly 3 and the wire control assembly 4 can be adjusted within a larger range to increase the thrust adjustment range of the ball screw 43, thereby facilitating the selection of the brake actuator.

[0072] like Figures 1 to 3 As shown, a brake system of an embodiment of the utility model includes a caliper (not shown in the figure) and a brake actuator, the brake actuator is the above-mentioned brake actuator, and the first end of the wire control component 4 is connected to the caliper (not shown in the figure).

[0073] Specifically, the brake actuator can be arranged on the wheel end caliper and connected to the brake control system (i.e., the controller) through a wiring harness to achieve control execution. That is, the present application adopts a motor assembly 3, a planetary gear mechanism, a two-stage gear transmission, a nut gear 41 and a ball screw 43 to form a dry transmission system to push the disc brake caliper to perform wheel end braking.

[0074] According to the brake system of the embodiment of the utility model, the brake actuator is designed as a structure in which the motor component 3 and the wire control component 4 are arranged at intervals on the same side of the circuit board 2 along the first direction, and the ends of the two adjacent to the circuit board 2 are electrically connected to the circuit board 2, so that the overall integration of the brake actuator is high. Therefore, compared with the related technology, the overall structural size of the brake system using the brake actuator is smaller.

[0075] A vehicle according to an embodiment of the utility model includes the above brake system.

[0076] According to the vehicle of the embodiment of the utility model, the overall volume of the vehicle can be reduced to a certain extent by adopting a brake system with a smaller overall structural size.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0079] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0081] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A brake actuator, characterized in that: include: a housing, the housing having a receiving cavity and an output port communicating with the receiving cavity; and A circuit board, a motor assembly and a wire control assembly, wherein the circuit board, the motor assembly and the wire control assembly are all installed in the accommodating cavity, the circuit board extends along a first direction, the motor assembly and the wire control assembly are arranged at intervals along the first direction and are located on the same side of the circuit board in the thickness direction of the circuit board, the motor assembly and the wire control assembly each have a first end and a second end arranged relatively, the second end of each of the motor assembly and the wire control assembly is closer to the circuit board than the corresponding first end, the first end of the motor assembly is transmission-connected to the wire control assembly through a reduction assembly, at least a portion of the first end of the wire control assembly is slidably fitted in the output port, and the second end of the motor assembly is electrically connected to the circuit board.

2. The brake actuator according to claim 1, characterized in that: The brake actuator further comprises a force sensor, the force sensor is located between the second end of the wire control assembly and the circuit board and connected to the second end of the wire control assembly, and the end of the force sensor away from the wire control assembly is electrically connected to the circuit board; And / or, the brake actuator further includes an elastic pin, wherein the elastic pin is located between the force sensor and the circuit board and is electrically connected to the force sensor and the circuit board respectively.

3. The brake actuator according to claim 1, characterized in that: The motor assembly includes a rotor, a motor body and a motor housing which are sequentially arranged from the inside to the outside. The rotor and the motor body each have a first end and a second end which are arranged relatively to each other along the thickness direction of the circuit board. The second end of each of the rotor and the motor body is closer to the circuit board than the corresponding first end. The first end of the rotor extends out of the motor housing and is transmission-connected to the reduction assembly through a motor gear, and the second end of the motor body is electrically connected to the circuit board through a motor pin.

4. The brake actuator according to claim 3, characterized in that: The second end of the rotor extends out of the motor housing; The brake actuator also includes a motor position sensor, which includes a TMR pole and a TMR chip. The TMR pole is installed at the second end of the rotor, and the TMR chip is connected to the circuit board and corresponds to the TMR pole interval in the thickness direction of the circuit board.

5. The brake actuator according to claim 1, characterized in that: The housing comprises a first shell and a second shell which are connected in sequence and define the accommodating cavity. The output port is formed on the first shell, and the circuit board is located in the second shell.

6. The brake actuator according to claim 2, characterized in that: The wire control assembly comprises: a nut gear, the nut gear being pivotally mounted in the accommodating cavity and having a sliding channel extending in the thickness direction of the circuit board, the nut gear being transmission-connected to the reduction assembly, and a portion of the nut gear away from the reduction assembly being connected to the force sensor; and A piston and a ball screw, wherein the piston is slidably fitted in the output port, at least a portion of the piston is connected to a first end of the ball screw, the piston is used to be connected to a caliper, and the ball screw is slidably fitted in the sliding channel and is connected to the screw nut gear through a ball screw pair; And / or, the brake actuator also includes a thrust bearing and a first support block, the nut gear, the thrust bearing, the first support block and the force sensor are arranged in sequence along the thickness direction of the circuit board and any two adjacent ones are abutted against each other, the thrust bearing and the first support block are coaxial with the sliding channel, and at least a portion of the ball screw is rotatably connected to the thrust bearing or the first support block.

7. The brake actuator according to any one of claims 1 to 6, characterized in that: The deceleration assembly comprises: a ring gear and a planetary gear, wherein the ring gear is installed in the accommodating cavity and adjacent to the first end of the motor assembly, the planetary gear is located between the inner circumferential surface of the ring gear and the first end of the motor assembly along the radial direction of the ring gear, and the ring gear, the planetary gear and the first end of the motor assembly are meshed and driven in sequence; and A planetary carrier, a planetary output gear and an intermediate gear, wherein the planetary carrier has a first end and a second end opposite to each other in the thickness direction of the circuit board, the first end of the planetary carrier and the intermediate gear can be pivotally mounted on the housing, the second end of the planetary carrier is connected to the planetary gear, the planetary output gear is mounted on the planetary carrier, the planetary output gear, the intermediate gear and the wire control assembly are arranged along the first direction and meshed in sequence for transmission.

8. The brake actuator according to claim 7, characterized in that: The intermediate gear includes a first gear and a second gear arranged at intervals along the thickness direction of the circuit board, the first gear is meshed with the planetary output gear, the second gear is meshed with the wire control assembly, and the number of teeth of the second gear is less than the number of teeth of the first gear.

9. A braking system, characterized in that: include: Calipers; and A brake actuator, wherein the brake actuator is the brake actuator according to any one of claims 1 to 8, and the first end of the wire control assembly is connected to the caliper.

10. A vehicle, characterized in that: The vehicle comprises the brake system of claim 9.

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