Electronic mechanical brake and vehicle

Abstract

The utility model discloses an electronic mechanical brake and a vehicle, and the electronic mechanical brake is characterized in that the electronic mechanical brake comprises a shell; a circuit board, wherein the circuit board is arranged in the shell; the execution mechanism is arranged in the shell body; the force sensor is used for sensing the counter-acting force borne by the executing mechanism, and the force sensor is directly and electrically connected with the circuit board; the circuit board, the force sensor and the execution mechanism are distributed in the axial direction, and the force sensor is used for converting the counter-acting force into an electric signal and transmitting the electric signal to the circuit board. According to the technical scheme, the force sensor is directly arranged on the circuit board, the distance between the force sensor and the circuit board is shortened, the trouble of wire arrangement in an execution assembly is omitted, connection between the force sensor and the circuit board is more stable, the problems of circuit open circuit and circuit failure are avoided, the overall structure is more compact, and cost is lower. The installation cost and the assembly difficulty are low.

Description

Technical Field

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

[0002] Electromechanical brakes are used in vehicle braking systems; with the development of new technologies such as vehicle electrification and autonomous driving, new demands have been placed on the electrification of vehicle braking systems.

[0003] Traditional vehicle braking systems are hydraulic, requiring the driver to pressurize the system via the brake pedal. This traditional system is not ideal for features like autonomous driving. Electromechanical brakes, on the other hand, allow for electronic control of the braking system. Vehicle braking signals are transmitted to the brake system controller, which then drives the braking system via an electronically controlled motor. Furthermore, the application of electromechanical brakes simplifies the overall vehicle braking structure.

[0004] However, existing electromechanical brakes have some problems in application, such as large axial space, insufficient clamping force in some cases, especially when it is necessary to detect the reaction force when the actuator hits the friction plate, there is a risk of failure such as breakage or short circuit in the connection wiring between the force sensor and the circuit board. Utility Model Content

[0005] One of the purposes of this utility model is to overcome the shortcomings of the prior art and, in view of the technical problems existing in the vehicle braking system in the prior art, to provide an electromechanical brake and vehicle with a simple connection structure and low failure risk.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] An electromechanical brake, characterized in that it comprises:

[0008] case;

[0009] A circuit board, wherein the circuit board is disposed within the housing;

[0010] An actuator is disposed within the housing;

[0011] A force sensor is used to sense the reaction force received by the actuator, and the force sensor is directly electrically connected to the circuit board.

[0012] The circuit board, force sensor, and actuator are distributed along the axial direction. The force sensor is used to convert the reaction force into an electrical signal and transmit it to the circuit board.

[0013] According to one embodiment of the present invention, the force sensor is provided with a plurality of elastic conductive connectors, and the force sensor is electrically connected to the circuit board through the plurality of elastic conductive connectors.

[0014] According to one embodiment of this utility model, the elastic conductive joint is a conductive spring.

[0015] According to one embodiment of the present invention, it further includes a bracket and a transmission gear; the actuator is a lead screw and nut, including a lead screw and a nut; the transmission gear meshes with the nut; the force sensor is connected to the lead screw through the bracket.

[0016] According to one embodiment of the present invention, the bracket includes a support base; the support base is provided with a groove, one end of the force sensor is housed in the groove, and the other end is electrically connected to the circuit board.

[0017] According to one embodiment of the present invention, the nut is cylindrical, and the nut includes a bottom and a wall; the bottom and the wall form a cavity; the force sensor is used to detect the reaction force on the nut.

[0018] According to one embodiment of the present invention, it further includes a guide structure for guiding the support base as it moves axially.

[0019] According to one embodiment of the present invention, the guide structure includes a guide rod and a guide hole; the lead screw is disposed in the cylinder cavity and extends from one end of the nut; the end of the lead screw is provided with the guide hole, the guide rod passes through the bottom of the cylinder and is inserted into the guide hole and can move axially within the guide hole.

[0020] According to one embodiment of the present invention, the guide structure further includes a boss and a countersunk hole; the bottom of the cylinder is provided with the countersunk hole, the support seat is provided with the boss, and the boss is accommodated in the countersunk hole.

[0021] According to one embodiment of the present invention, a bearing is provided between the support base and the bottom of the cylinder; the bearing is arranged around the boss.

[0022] According to one embodiment of the present invention, the housing is provided with a receiving portion, the receiving portion is provided with a cavity adapted to the shape of the support base, and the support base is partially received in the cavity of the receiving portion and can move axially.

[0023] According to one embodiment of the present invention, a baffle is connected to one end of the lead screw extending from the nut; the lead screw abuts against the friction plate through the baffle.

[0024] This utility model also relates to a vehicle, characterized in that it includes the aforementioned electromechanical brake.

[0025] The electromechanical brake and vehicle disclosed in this utility model shorten the distance between the force sensor and the circuit board by directly mounting the force sensor on the circuit board, eliminating the trouble of connecting the force sensor and the circuit board with ribbon cables. This makes the connection between the force sensor and the circuit board more stable and avoids problems such as open circuits and circuit failures. In addition, the overall structure is more compact and the installation cost and assembly difficulty are low. Attached Figure Description

[0026] This utility model is described with reference to the following drawings:

[0027] Figure 1 This is a schematic diagram of the structure of an electromechanical brake according to an embodiment of this utility model;

[0028] Figure 2 This is a partial structural schematic diagram of the electromechanical brake in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the electromechanical brake component in an embodiment of the present invention. Detailed Implementation

[0030] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0032] like Figures 1 to 3 As shown, the electromechanical brake 1 of this embodiment includes a housing 100, a bracket 200, and a circuit board 300. The housing 100 is provided with a cavity 101 for accommodating other components, and the bracket 200 is connected to the housing 100. An inner friction plate 400 disposed near the housing 100 and an outer friction plate 500 disposed away from the housing 100 are mounted on the bracket 200. A motor 600, a transmission mechanism, an actuator 700, and a force sensor 900 are disposed inside the housing 100. The motor 600 drives the actuator 700 to move through the transmission mechanism. When the actuator 700 moves, it drives the inner friction plate 400 and the outer friction plate 500 to move.

[0033] The transmission mechanism is a gear set, including multiple gears. The specific structure of the transmission mechanism can be determined with reference to existing technology, and will not be described in detail here. In the embodiments of this utility model, at least one transmission gear 701 is included.

[0034] The actuator 700 is a lead screw nut, comprising a nut 710 and a lead screw 720. The nut 710 and the lead screw 720 are threaded together. In this embodiment, the nut 710 is cylindrical, comprising a bottom 711 and a wall 712. The bottom 711 and the wall 712 form a cylindrical cavity. The bottom 711 is provided with a countersunk hole 714. A through hole 715 is provided within the countersunk hole 714. The through hole 715 penetrates the bottom 711. One end of the lead screw 720 is disposed within the cylindrical cavity, and the other end extends out of the cylindrical cavity. The lead screw 720 is provided with a guide hole 721. The guide hole 721 can be an axial countersunk hole or an axial through hole. A baffle 714 is connected to the end of the lead screw 710 extending out of the cylindrical cavity 713. A secondary gear 716 is fitted onto the nut 710. The secondary gear 716 meshes with the transmission gear 701. According to the embodiment of this utility model, teeth can also be machined on the nut 710, and the nut 710 directly meshes with the transmission gear 701. The motor 600 drives the nut 710 to rotate through the transmission gear 701, and when the nut 710 rotates, it causes the lead screw 720 to move axially. When the lead screw 720 moves axially, it pushes the inner friction plate 400 and the outer friction plate 500 to move through the baffle 714.

[0035] The housing 100 is provided with a receiving portion 102, and the receiving portion 102 is provided with a cavity 103. For example... Figure 1 As shown, a circuit board 300 is installed inside the housing 100. The circuit board 300 is located above the receiving portion 102.

[0036] The electromechanical brake 1 of this utility model also includes a bracket 730. The bracket 730 includes a support base 731 and a guide rod 732. Figure 1 As shown, the support base 731 has a groove 733 on its upper surface and a boss 734 on its lower surface. The shape of the support base 731 is adapted to the cavity 103 so that the support base 731 is partially accommodated within the cavity 103 and can move axially. The boss 734 is accommodated within the countersunk hole 714. One end of the guide rod 732 is connected to the boss 734, and the other end passes through the through hole 715 and is inserted into the guide hole 721, where it can move. One end of the force sensor 900 is accommodated within the groove 733. The other end of the force sensor 900 is provided with a conductive spring 901. The conductive spring 901 is inserted into the circuit board 300 and electrically connected to the circuit board 300. A bearing 740 is provided between the support base 731 and the bottom of the cylinder 711.

[0037] In this embodiment, the circuit board 300, force sensor 900, and actuator 800 are distributed axially. The force sensor 900 is connected between the actuator 800 and the circuit board 300. In the actuator 800, when the nut 710 rotates, the lead screw 720 moves axially. When the lead screw 720 pushes the inner friction plate 400 and the outer friction plate 500, it experiences a reaction force from both. This reaction force is transmitted to the nut 710, and then through the bracket 730 to the force sensor 900. The force sensor 900 converts the reaction force into an electrical signal, which is then transmitted to the circuit board 300 via the conductive spring 901. The actuator 700 experiences an axial reaction force, so the force sensor 900 and the nut 710 remain in contact. The circuit board 300 monitors the magnitude of the braking force output by the actuator assembly to the brake disc in real time. Therefore, the output braking force can be adjusted by adjusting the output torque of the motor 600 to facilitate control strategy settings. The circuit board 300 can recognize feedback information and take further action.

[0038] The guide rod 732 mates with the guide hole 721, and the boss 734 mates with the countersunk hole 714 to form a guide structure. The bracket 730 can move axially, and the guide mechanism ensures that the bracket 730 moves axially without deviating during its movement. The support seat 731 is partially housed within the cavity of the receiving part 102, and can also serve a guiding function.

[0039] In the execution assembly of this embodiment, the force sensor 900 is designed to be directly connected to the circuit board 300 (PCBA, Printed Circuit Board Assembly). The conductive spring 901 on the force sensor 900 is designed to effectively ensure that there will be no open circuit between the force sensor 900 and the circuit board 300 due to minor vibrations or dimensional manufacturing errors. Furthermore, the wireless connection design between the force sensor 900 and the circuit board 300 can effectively eliminate the risk of failure caused by wire damage, short circuit, open circuit, or getting caught in the nut 710 when the wire pulled out from the force sensor 900 passes through various components (especially gear-like components) in the housing 100 and connects to the circuit board 300.

[0040] The electromechanical brake and vehicle disclosed in this utility model shorten the distance between the force sensor and the circuit board by directly mounting the force sensor on the circuit board, eliminating the trouble of connecting the force sensor and the circuit board with ribbon cables. This makes the connection between the force sensor and the circuit board more stable and avoids problems such as open circuits and circuit failures. In addition, the overall structure is more compact and the installation cost and assembly difficulty are low.

[0041] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. An electromechanical brake, characterized in that, include: case; A circuit board, wherein the circuit board is disposed within the housing; An actuator is disposed within the housing; A force sensor is used to sense the reaction force received by the actuator, and the force sensor is directly electrically connected to the circuit board. The circuit board, force sensor, and actuator are distributed along the axial direction. The force sensor is used to convert the reaction force into an electrical signal and transmit it to the circuit board.

2. The electromechanical brake according to claim 1, characterized in that, The force sensor is provided with multiple elastic conductive connectors, and the force sensor is electrically connected to the circuit board through the multiple elastic conductive connectors.

3. The electromechanical brake according to claim 2, characterized in that, The elastic conductive connector is a conductive spring.

4. The electromechanical brake according to claim 1, characterized in that, It also includes a bracket and a transmission gear; the actuator is a lead screw and nut, including a lead screw and a nut; the transmission gear meshes with the nut; the force sensor is connected to the lead screw through the bracket.

5. The electromechanical brake according to claim 4, characterized in that, The bracket includes a support base; the support base is provided with a groove, one end of the force sensor is housed in the groove, and the other end is electrically connected to the circuit board.

6. The electromechanical brake according to claim 5, characterized in that, The nut is cylindrical, and includes a bottom and a wall; the bottom and the wall form a cavity; the force sensor is used to detect the reaction force on the nut.

7. The electromechanical brake according to claim 6, characterized in that, It also includes a guide structure for guiding the support as it moves axially.

8. The electromechanical brake according to claim 7, characterized in that, The guiding structure includes a guide rod and a guide hole; the lead screw is disposed in the cylinder cavity and extends from one end of the nut; the end of the lead screw is provided with the guide hole, the guide rod passes through the bottom of the cylinder and is inserted into the guide hole and can move axially within the guide hole.

9. The electromechanical brake according to claim 7, characterized in that, The guide structure further includes a boss and a countersunk hole; the bottom of the cylinder is provided with the countersunk hole, the support base is provided with the boss, and the boss is housed within the countersunk hole.

10. The electromechanical brake according to claim 9, characterized in that, A bearing is provided between the support base and the bottom of the cylinder; the bearing is arranged around the boss.

11. The electromechanical brake according to claim 5, characterized in that, The housing is provided with a receiving part, and the receiving part is provided with a cavity adapted to the shape of the support base. The support base is partially received in the cavity of the receiving part and can move axially.

12. The electromechanical brake according to claim 5, characterized in that, The end of the lead screw extending out of the nut is connected to a baffle; the lead screw abuts against the friction plate through the baffle.

13. A vehicle, characterized in that, Includes the electromechanical brake as described in any one of claims 1-12.

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