A motor position sensor and electric power brake system

Abstract

The application discloses a motor position sensor and an electric power-assisted braking system, and relates to the technical field of automobile chassis braking. The motor position sensor comprises an induction seat, a guide section and a wiring section which are sequentially arranged on one side of the induction seat, the guide section penetrates through a valve block, the induction seat is arranged on the same side of a motor to detect the rotating angle of the motor, and the wiring section is matched with a terminal plug-in connection with a wiring post on an electric control unit. The motor position sensor can improve the stability of signal transmission.

Description

Technical Field

[0001] This application relates to the field of automotive chassis braking technology, and more specifically, to a motor position sensor and an electric power-assisted braking system. Background Technology

[0002] In an electric power-assisted braking system, when the driver presses the brake pedal, the braking demand is transmitted to the electronic control unit (ECU) via a pedal displacement sensor. The ECU receives the signal, converts it, and outputs it to the drive motor, thereby driving the motor to rotate and achieve the braking demand. However, in order to accurately achieve the braking demand, a motor position sensor is also needed to detect the angle of the motor rotation, thereby controlling the rotation of the drive motor.

[0003] Currently, in existing electric power-assisted braking systems on the market, the motor position sensor is mainly fixed to the rear cover of the drive motor. The entire motor position sensor passes through the valve block and is connected to the electronic control unit via a contact spring to achieve signal transmission and communication. Because the contact spring has a helical structure, the contact area with the motor position sensor is small. Under the condition of vehicle bumps and vibrations, unstable contact can easily cause signal loss, resulting in the failure of electric power assistance. Utility Model Content

[0004] The purpose of this application is to provide a motor position sensor and an electric power-assisted braking system that can improve the stability of signal transmission.

[0005] The embodiments of this application are implemented as follows:

[0006] In one aspect of this application, a motor position sensor is provided, including a sensing base and a guide section and a wiring section arranged sequentially on one side of the sensing base. The guide section passes through a valve block. The sensing base is arranged on the same side as the motor to detect the rotation angle of the motor. The wiring section is connected to a terminal block on an electronic control unit via a terminal plug-in connection.

[0007] Optionally, as one possible implementation, the wiring segment includes a wiring housing and a wiring terminal passing through the wiring housing. The wiring terminal includes a sleeve and an elastic arm disposed within the sleeve. The elastic arm and the inner wall of the sleeve cooperate to clamp the terminal on the electronic control unit.

[0008] Alternatively, as an implementable method, the wiring housing is provided with a flared opening that communicates with the sleeve, and the wiring post on the electronic control unit is guided to be plugged into the wiring terminal through the flared opening.

[0009] Optionally, as one possible implementation, the sensor base includes a mounting block and a circuit board disposed at the bottom of the mounting block, wherein a connecting wire electrically connected to the circuit board passes through the mounting block and is electrically connected to the guide segment through the connecting wire.

[0010] Optionally, as an implementable method, the guide section includes a left housing, a right housing, and a wire. The wire is housed within a tubular cavity formed by the left housing and the right housing. Both ends of the wire are electrically connected to the connecting line and the terminal block, respectively. Protective grooves are provided on both the left housing and the right housing to limit and fix the wire.

[0011] Optionally, as an implementable method, the mounting block is provided with a first connecting section and the wiring housing is provided with a second connecting section, the first connecting section and the second connecting section being located at both ends of the tubular cavity formed by the left housing and the right housing.

[0012] Optionally, as an implementable method, the first connecting segment is provided with a first slot, the second connecting segment is provided with a second slot, the left housing is provided with first protrusions at both ends respectively engaging the first slot and the second slot, and the right housing is provided with second protrusions at both ends respectively engaging the first slot and the second slot.

[0013] Optionally, as an implementable method, a first buckle is provided on the inner side of the left housing, and a second buckle is provided on the inner side of the right housing to engage with the first buckle, and the left housing and the right housing are engaged by the first buckle and the second buckle.

[0014] In another aspect of this application, an electric power-assisted braking system is provided, including a motor, a valve block, an electronic control unit, and a motor position sensor as described in any of the above. The motor and the electronic control unit are disposed on both sides of the valve block. The sensing base of the motor position sensor is mounted on the valve block and is magnetically connected to the motor. The guide section of the motor position sensor passes through the valve block. The wiring section of the motor position sensor is connected to the terminal block on the electronic control unit via a terminal plug-in connection.

[0015] Optionally, as an implementable method, the sensing base of the motor position sensor is provided with positioning protrusions on both sides, and the valve block is provided with positioning grooves for accommodating the positioning protrusions, wherein the positioning protrusions and the positioning grooves are interference-fitted.

[0016] The beneficial effects of the embodiments of this application include:

[0017] The motor position sensor and electric power-assisted braking system provided in this application include a sensing base and a guide section and a wiring section sequentially arranged on one side of the sensing base. The guide section passes through a valve block. The sensing base is located on the same side as the motor to detect the motor's rotation angle. The wiring section is connected to the terminal block on the electronic control unit via a terminal plug-in connection. Compared to traditional contact spring connections, the terminal plug-in connection provides a larger contact area and a tighter connection structure. Under conditions of vehicle vibration and bumps, the terminal plug-in connection effectively avoids signal loss due to unstable contact, greatly improving the stability of signal transmission and ensuring that the electric power-assisted braking system can continuously and accurately receive motor position information, thereby achieving a stable and reliable electric power-assisted function. The design of the guide section of the motor position sensor passing through the valve block makes the sensor installation process simpler and faster, reducing installation time and difficulty. Furthermore, when the sensor malfunctions and requires maintenance or replacement, the terminal plug-in connection facilitates disassembly and installation, reducing maintenance costs and time, and improving maintenance efficiency. This application significantly enhances the reliability of the entire electric power-assisted braking system through stable signal transmission, convenient installation and maintenance, and accurate testing. It reduces the probability of system failure due to signal transmission problems, extends the service life of the braking system, and improves the safety and stability of the vehicle during operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the electric power-assisted braking system provided in the embodiments of this application;

[0020] Figure 2 This is one of the structural schematic diagrams of the motor position sensor in the electric power-assisted braking system provided in the embodiments of this application;

[0021] Figure 3 This is a second schematic diagram of the structure of the motor position sensor in the electric power-assisted braking system provided in the embodiments of this application.

[0022] Icons: 1000 - Electric power-assisted braking system; 100 - Motor position sensor; 110 - Sensor base; 111 - Mounting block; 1111 - First slot; 112 - Circuit board; 113 - Connecting wire; 120 - Guide section; 121 - Left housing; 122 - Right housing; 123 - Wire; 130 - Wiring section; 131 - Wiring housing; 1311 - Horn mouth; 1312 - Second slot; 132 - Terminal block; 200 - Motor; 300 - Valve block; 400 - Electronic control unit. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] It should be noted that 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. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3This embodiment provides a motor position sensor 100, including a sensing base 110 and a guide section 120 and a wiring section 130 arranged sequentially on one side of the sensing base 110. The guide section 120 passes through the valve block 300. The sensing base 110 is arranged on the same side as the motor 200 to detect the rotation angle of the motor 200. The wiring section 130 is connected to the terminal block on the electronic control unit 400 through a terminal plug-in connection.

[0028] Specifically, when the driver presses the brake pedal, the brake signal is transmitted to the electronic control unit 400 via the pedal displacement sensor. After analyzing the signal, the electronic control unit 400 outputs it to the drive motor 200. At this time, the sensing base 110 of the motor position sensor 100 detects the rotation angle of the motor 200 in real time. The sensor is connected to the terminal of the electronic control unit 400 through the wiring segment 130, and the detected signal is stably transmitted to the electronic control unit 400 so that the electronic control unit 400 can accurately control the rotation of the drive motor 200 and realize a reliable brake assist function.

[0029] The motor position sensor 100 provided in this application includes a sensing base 110 and a guide section 120 and a wiring section 130 sequentially arranged on one side of the sensing base 110. The guide section 120 passes through the valve block 300. The sensing base 110 is located on the same side as the motor 200 to detect the rotation angle of the motor 200. The wiring section 130 is connected to the terminal block on the electronic control unit 400 via a terminal plug-in connection. The terminal plug-in connection between the wiring section 130 of the motor position sensor 100 and the terminal block of the electronic control unit 400 provides a larger contact area and a tighter connection structure compared to traditional contact spring connections. Under conditions of vehicle vibration and bumps, the terminal plug-in connection effectively avoids signal loss due to unstable contact, greatly improving the stability of signal transmission and ensuring that the electric power-assisted braking system 1000 can continuously and accurately receive the position information of the motor 200, thereby achieving a stable and reliable electric power-assisted function. The design of the guide section 120 of the motor position sensor 100 penetrating the valve block 300 simplifies and speeds up the sensor installation process, reducing installation time and difficulty. Simultaneously, when the sensor malfunctions and requires maintenance or replacement, the terminal plug-in connection facilitates disassembly and installation, reducing maintenance costs and time, and improving maintenance efficiency. This application, through stable signal transmission, convenient installation and maintenance, and accurate detection, significantly enhances the reliability of the entire electric power-assisted braking system 1000. It reduces the probability of system failure due to signal transmission problems, extends the service life of the braking system, and improves the safety and stability of the vehicle during operation.

[0030] In one possible embodiment of this application, such as Figure 1 , Figure 2 and Figure 3As shown, the wiring section 130 includes a wiring housing 131 and a wiring terminal 132 passing through the wiring housing 131. The wiring terminal 132 includes a sleeve and an elastic arm disposed in the sleeve. The elastic arm and the inner wall of the sleeve cooperate to clamp the terminal on the electronic control unit 400.

[0031] Specifically, this application utilizes the cooperation between the elastic arm and the inner wall of the sleeve to securely clamp the terminals on the electronic control unit 400, achieving a reliable electrical connection between the two. This structural design, through the elastic deformation of the elastic arm, can adapt to terminals of different specifications, and maintains good clamping force even under external forces such as vibration, ensuring the continuity of signal transmission.

[0032] The flexible arm, in conjunction with the inner wall of the sleeve, clamps the terminal block, providing greater friction and clamping force compared to ordinary plug-in connections. This effectively prevents the terminal block 132 from loosening and separating from the terminal block due to bumps and vibrations during vehicle operation, greatly enhancing connection stability and ensuring reliable signal transmission. The elasticity of the flexible arm allows the terminal block 132 to adapt to different sizes and shapes of the electronic control unit 400 terminals within a certain range, eliminating the need to design different terminal blocks 132 for different specifications. This improves the versatility and adaptability of the motor position sensor 100 and reduces production and maintenance costs. The stable connection reduces changes in contact resistance, avoiding signal interference and loss caused by poor contact. This allows the signal detected by the motor position sensor 100 to be transmitted to the electronic control unit 400 more accurately and stably, helping the electronic control unit 400 to control the drive motor 200 more precisely and improving the overall performance of the electric power-assisted braking system 1000.

[0033] In one possible embodiment of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, the wiring housing 131 is provided with a flared opening 1311 that communicates with the sleeve, and the wiring post on the electronic control unit 400 is guided to be plugged into the wiring terminal 132 through the flared opening 1311.

[0034] Specifically, the flared end 1311 guides the terminals on the electronic control unit 400 to smoothly connect with the terminal blocks 132. During installation, the terminals can be more easily inserted into the sleeve along the bevel of the flared end 1311, reducing installation difficulty and connection errors, and improving installation efficiency. The guiding effect of the flared end 1311 makes the connection process between the terminals and terminal blocks 132 smoother. Even in situations with limited installation space and inconvenient operation, installers can quickly and accurately complete the wiring work, reducing installation difficulty, shortening installation time, and improving production assembly efficiency. Because the flared end 1311 guides the terminals to insert accurately, it avoids collisions and scratches between the terminals and terminal blocks 132 caused by blind connection, thereby reducing the risk of damage to the terminals and terminal blocks 132, extending the service life of the motor position sensor 100 and related components of the electronic control unit 400, and reducing maintenance and replacement costs. The guiding function of the 1311 horn ensures that the terminal block can be accurately inserted into the appropriate position inside the sleeve, guaranteeing good contact and stable clamping between the elastic arm and the terminal block, further improving the accuracy and reliability of the connection, and providing a guarantee for stable signal transmission.

[0035] In one possible embodiment of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, the sensor base 110 includes a mounting block 111 and a circuit board 112 disposed at the bottom of the mounting block 111. A connecting wire 113 electrically connected to the circuit board 112 passes through the mounting block 111 and is electrically connected to the guide section 120 through the connecting wire 113.

[0036] Specifically, the sensor base 110 consists of a mounting block 111 and a circuit board 112 disposed at the bottom of the mounting block 111. A connecting wire 113, electrically connected to the circuit board 112, passes through the mounting block 111, and is electrically connected to the guide section 120 via this connecting wire 113. The circuit board 112 is responsible for sensing the rotation angle of the motor 200 and converting it into an electrical signal. The mounting block 111 provides protection and mounting support for the circuit board 112, while the connecting wire 113 acts as a bridge for signal transmission, ensuring that the signal detected by the sensor base 110 can be smoothly transmitted to subsequent circuits. A mounting groove is provided at the bottom of the mounting block 111, and the circuit board 112 is installed in the mounting groove, with the groove covered by a base plate to secure the circuit board 112.

[0037] The mounting block 111 encloses the circuit board 112, effectively preventing it from being damaged by external physical impacts, dust, moisture, etc., thus protecting the electronic components on the circuit board 112 and improving the reliability and lifespan of the sensor base 110. This also reduces the probability of sensor failure due to damage to the circuit board 112. The rational layout of the connecting wire 113 within the mounting block 111 ensures that the signal detected by the sensor base 110 can be transmitted to the guide section 120 via the shortest and most stable path, reducing signal loss and interference during transmission and improving signal transmission efficiency and accuracy. This provides a guarantee for the electronic control unit 400 to obtain accurate position information of the motor 200. This modular design divides the sensor base 110 into two parts: the mounting block 111 and the circuit board 112. This facilitates separate processing and installation during production assembly, improving production efficiency. When the sensor malfunctions, it also facilitates individual inspection and replacement of the mounting block 111 and the circuit board 112, reducing maintenance difficulty and cost.

[0038] In one possible embodiment of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, the guide section 120 includes a left housing 121, a right housing 122 and a wire 123. The wire 123 is housed in the tubular cavity formed by the left housing 121 and the right housing 122. The two ends of the wire 123 are electrically connected to the connecting wire 113 and the terminal 132, respectively. Both the left housing 121 and the right housing 122 are provided with protective grooves, which limit and fix the wire 123.

[0039] The protective groove limits and fixes the wire 123, preventing it from shaking or shifting within the tubular cavity and ensuring the stability of signal transmission. The tubular cavity provides physical protection for the wire 123, preventing it from being squeezed, rubbed, or pulled by external forces, thus extending its service life. Simultaneously, the protective groove's limiting and fixing effect further prevents the wire 123 from moving freely within the cavity, reducing signal transmission failures caused by wire damage or poor contact, and improving the reliability of the motor position sensor 100. A properly fixed wire 123 ensures that the electrical signal will not be interfered with or lost during transmission due to shaking or shifting, ensuring that the signal detected by the sensing base 110 is stably and accurately transmitted to the terminal block 132, and then to the electronic control unit 400, enabling the electronic control unit 400 to precisely control the drive motor 200 based on accurate motor 200 position information. The separate design of the left housing 121 and the right housing 122 facilitates the placement of the wire 123 in the appropriate position during installation and subsequent assembly. It also facilitates the disassembly of the left and right housings 122 for inspection and replacement in case of wire 123 failure, reducing the difficulty of installation and maintenance and improving work efficiency.

[0040] In one possible embodiment of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, the mounting block 111 is provided with a first connecting section and the wiring housing 131 is provided with a second connecting section. The first connecting section and the second connecting section are located at both ends of the tubular cavity formed by the left housing 121 and the right housing 122.

[0041] Furthermore, the first connecting segment is provided with a first slot 1111, the second connecting segment is provided with a second slot 1312, the left housing 121 has first protrusions at both ends that respectively engage the first slot 1111 and the second slot 1312, and the right housing 122 has second protrusions at both ends that respectively engage the first slot 1111 and the second slot 1312. Through the cooperation of these slots and protrusions, a firm connection is achieved between the sensor base 110, the guide segment 120, and the wiring segment 130.

[0042] This application utilizes a snap-fit ​​mechanism between slots and protrusions to provide strong connection and friction, effectively preventing relative displacement or separation of the sensor base 110, guide section 120, and wiring section 130 during vehicle operation due to vibration, impact, or other external forces. This significantly improves the overall robustness and stability of the motor position sensor 100. This snap-fit ​​structure is easy to install; simply align the protrusions of the left and right housings 122 with the corresponding slots and insert them to complete the connection. Disassembly and maintenance also require no complex tools; appropriate force is sufficient to separate the parts, making it convenient and quick, reducing installation and maintenance difficulty, and improving work efficiency. The robust connection ensures that the electrical connection between the parts is not affected by structural loosening, guaranteeing the stability and accuracy of the signal during transmission and preventing signal loss or interference due to loose connections, thus ensuring the reliable operation of the electric power-assisted braking system 1000.

[0043] In one possible embodiment of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, a first buckle is provided on the inner side of the left housing 121, and a second buckle is provided on the inner side of the right housing 122 to engage with the first buckle. The left housing 121 and the right housing 122 are engaged by the first buckle and the second buckle.

[0044] This snap-fit ​​design makes the assembly and disassembly of the left and right housings 122 more convenient, while ensuring the stability of the guide section 120 structure. The snap-fit ​​design of the first and second snaps allows the assembly of the left and right housings 122 to be completed without the need for additional tools and connectors. Simply aligning and pressing the two together achieves a quick and accurate connection, greatly simplifying the production assembly process, improving production efficiency, and reducing production costs.

[0045] This application also discloses an electric power-assisted braking system 1000, including a motor 200, a valve block 300, an electronic control unit 400, and a motor position sensor 100 as described above. The motor 200 and the electronic control unit 400 are disposed on both sides of the valve block 300. The sensing base 110 of the motor position sensor 100 is mounted on the valve block 300 and magnetically connected to the motor 200. The guide section 120 of the motor position sensor 100 passes through the valve block 300. The wiring section 130 of the motor position sensor 100 is connected to the terminal block on the electronic control unit 400 via terminal plug-in. This system can accurately and stably detect the rotation angle of the motor 200 and transmit signals, enabling the electronic control unit 400 to more precisely control the operation of the drive motor 200, thereby achieving more precise braking assistance, improving the braking performance of the electric power-assisted braking system 1000, and providing more reliable safety assurance for vehicle driving.

[0046] In one possible embodiment of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, the motor position sensor 100 has positioning protrusions on both sides of the sensing base 110, and the valve block 300 has a positioning groove for accommodating the positioning protrusions. The positioning protrusions and the positioning grooves are interference-fitted.

[0047] Specifically, the positioning protrusion and positioning groove are riveted together to provide a precise positioning reference for the installation of the sensing seat 110 on the valve block 300, ensuring that the sensing seat 110 can be accurately installed in the predetermined position and that the magnetic induction connection between the sensing seat 110 and the motor 200 is in the optimal state, thereby improving the accuracy of the rotation angle detection of the motor 200. The interference fit makes the connection between the sensing seat 110 and the valve block 300 tighter and more secure. During vehicle operation, even if subjected to external forces such as vibration and impact, the sensing seat 110 is not prone to displacement or loosening, ensuring the stability and reliability of the motor position sensor 100 and avoiding detection errors and signal transmission problems caused by the displacement of the sensing seat 110.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A motor position sensor, characterized in that, It includes a sensor base and a guide section and a wiring section arranged sequentially on one side of the sensor base. The guide section passes through the valve block. The sensor base is arranged on the same side as the motor to detect the rotation angle of the motor. The wiring section is connected to the terminal block on the electronic control unit through a terminal plug-in connection.

2. The motor position sensor according to claim 1, characterized in that, The wiring segment includes a wiring housing and a wiring terminal passing through the wiring housing. The wiring terminal includes a sleeve and an elastic arm disposed within the sleeve. The elastic arm and the inner wall of the sleeve cooperate to clamp the wiring post on the electronic control unit.

3. The motor position sensor according to claim 2, characterized in that, The wiring housing is provided with a flared opening that communicates with the sleeve, and the wiring post on the electronic control unit is guided to be plugged into the wiring terminal through the flared opening.

4. The motor position sensor according to claim 2, characterized in that, The sensor base includes a mounting block and a circuit board disposed at the bottom of the mounting block. A connecting wire electrically connected to the circuit board passes through the mounting block and is electrically connected to the guide section through the connecting wire.

5. The motor position sensor according to claim 4, characterized in that, The guide section includes a left housing, a right housing, and a wire. The wire is housed in a tubular cavity formed by the left housing and the right housing. Both ends of the wire are electrically connected to the connecting wire and the terminal block, respectively. Protective grooves are provided on both the left housing and the right housing to limit and fix the wire.

6. The motor position sensor according to claim 5, characterized in that, The mounting block is provided with a first connecting section, and the wiring housing is provided with a second connecting section. The first connecting section and the second connecting section are located at both ends of the tubular cavity formed by the left housing and the right housing.

7. The motor position sensor according to claim 6, characterized in that, The first connecting segment is provided with a first slot, the second connecting segment is provided with a second slot, the left housing is provided with first protrusions at both ends respectively engaging the first slot and the second slot, and the right housing is provided with second protrusions at both ends respectively engaging the first slot and the second slot.

8. The motor position sensor according to claim 5, characterized in that, The left housing has a first buckle on its inner side, and the right housing has a second buckle on its inner side that engages with the first buckle. The left housing and the right housing are connected by the first buckle and the second buckle.

9. An electric power-assisted braking system, characterized in that, The device includes a motor, a valve block, an electronic control unit, and a motor position sensor as described in any one of claims 1-8. The motor and the electronic control unit are disposed on both sides of the valve block. The sensing base of the motor position sensor is mounted on the valve block and is magnetically connected to the motor. The guide section of the motor position sensor passes through the valve block. The wiring section of the motor position sensor is connected to the terminal block of the electronic control unit via a terminal plug-in connection.

10. The electric power-assisted braking system according to claim 9, characterized in that, The motor position sensor has positioning protrusions on both sides of its sensing base, and the valve block has a positioning groove for accommodating the positioning protrusions. The positioning protrusions and the positioning grooves are interference-fitted.

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