A rotation-preventing and positioning integrated pedal stroke sensor

Abstract

This utility model relates to the field of pedal travel sensor technology, providing a pedal travel sensor that integrates anti-rotation and positioning. It includes a magnet assembly with a sensing component on one side. The magnet assembly includes a plastic housing with a fork at one end, and multiple sets of interference points on the surface of the fork. The sensing component includes a sensing housing with a circuit board installed inside. A connector is located on the side of the sensing housing away from the circuit board. A secondary positioning post mechanism is located on the side of the sensing housing near the connector. This device solves the problem of pedal travel sensor installation accuracy, improves the detection accuracy of the pedal travel sensor, enhances stability during use, and reduces production costs.

Description

Technical Field

[0001] This utility model relates to the field of pedal travel sensor technology, and more specifically, it relates to a pedal travel sensor that integrates anti-rotation and positioning. Background Technology

[0002] A pedal travel sensor is a Hall effect sensor that integrates multiple horizontal and vertical Hall plates to accurately measure the vertical and horizontal components of a magnetic field. It is primarily used to measure the displacement of the pedal when the driver depresses it, and typically requires high accuracy.

[0003] In braking control systems, it is typically necessary to collect brake pedal displacement data to determine the driver's braking intention. The braking control system then provides corresponding braking assistance based on this data. Due to space limitations within the vehicle's driver's compartment, the pedal travel is usually only a few millimeters to tens of millimeters. If the actual displacement data from the sensor differs significantly from the theoretical value of the braking control system, misinterpretation of the driver's intention can occur. For example, if the pedal travel sensor's displacement data is much smaller than the actual brake pedal travel value, insufficient braking force will result, increasing the braking distance and creating a safety risk. This error often occurs during the installation of the pedal travel sensor. After installation, gaps may exist between the pedal travel sensor and its mounting housing or between the sensor and the fixed equipment. These gaps affect the sensor's detection accuracy, thus increasing the safety risk while driving.

[0004] Therefore, a pedal travel sensor that integrates anti-rotation and positioning is provided to solve the problem of pedal travel sensor installation accuracy. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pedal stroke sensor that integrates anti-rotation and positioning, thereby reducing the gap in sensor movement, improving the detection accuracy of the pedal stroke sensor, and reducing production costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A pedal travel sensor integrating anti-rotation and positioning includes a magnet assembly, with a sensing component disposed on one side of the magnet assembly; the magnet assembly includes a plastic housing, with a shift fork disposed at one end of the plastic housing, and multiple sets of shift fork interference points disposed on the surface of the shift fork.

[0007] The present invention is further configured such that: the fork plate has an arc-shaped structure, and two sets of fork end faces are provided on the side of the fork plate away from the plastic shell, and the included angle between the two sets of fork end faces and the center of the fork plate is not greater than 180°.

[0008] By adopting the above technical solution, the fork plate with an included angle of no more than 180° prevents the fixed magnet assembly from falling off the piston rod before it is pressed into the valve block, making it easier for operators to install during production and improving their installation efficiency.

[0009] The present invention is further configured such that multiple sets of interference points of the shift fork are arranged in a ring around the center of the shift fork plate.

[0010] By adopting the above technical solution, multiple sets of shift fork interference points are interference-fitted with the outer wall of the piston rod. After the magnet assembly and piston rod are press-fitted, the axial movement of the magnet assembly can be effectively avoided, the sensing accuracy of the magnet assembly for the piston position inside the piston rod can be improved, and the detection accuracy of the pedal stroke sensor can be improved.

[0011] The present invention is further configured such that: the sensing component includes a housing, a circuit board is mounted on the housing, and a connector is provided on the side of the housing away from the circuit board.

[0012] The present invention is further configured such that a secondary positioning column mechanism is provided on the side of the outer shell near the connector.

[0013] The present invention is further configured such that: the secondary positioning column mechanism includes a buckle, and the buckle is provided with two sets of secondary positioning interference blocks on the side near the connector.

[0014] By adopting the above technical solution, the buckle and the buckle groove of the valve block cooperate to prevent the pedal stroke sensor from falling off. The two sets of auxiliary positioning interference blocks are slightly interference-fitted with the valve block to prevent the pedal stroke sensor from rotating. The slightly interference-fitted between the housing and the valve block ensures the coaxiality of the pedal stroke sensor. The above method reduces the gap of the overall movement of the sensing component, improves the detection accuracy of the pedal stroke sensor, and the sensing component is integrally molded to reduce production costs.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. The fork plate with an included angle of no more than 180° prevents the fixed magnet assembly from falling off the piston rod before it is pressed into the valve block, making it easier for operators to install during production and improving their installation efficiency.

[0016] 2. By using multiple sets of fork interference points to connect with the outer wall of the piston rod, the axial movement of the magnet assembly can be effectively avoided after the magnet assembly and piston rod are press-fitted together. This improves the sensing accuracy of the magnet assembly for the piston position inside the piston rod, thereby improving the detection accuracy of the pedal stroke sensor.

[0017] 3. The pedal travel sensor is prevented from falling off by engaging with the latching groove of the valve block. Two sets of secondary positioning interference blocks are used to make a slight interference fit with the valve block to prevent the pedal travel sensor from rotating. The slight interference fit between the housing and the valve block ensures the coaxiality of the pedal travel sensor. By reducing the gap of the overall movement of the sensing component through the above methods, the detection accuracy of the pedal travel sensor is improved. The sensing component is integrally molded, reducing production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the braking device in this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the braking device in this utility model.

[0020] Figure 3 This is a schematic diagram of the magnet assembly in this utility model.

[0021] Figure 4 This is a schematic diagram of the sensing component in this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Valve block; 2. Piston rod; 3. Magnet assembly; 31. Plastic housing; 32. Shift fork; 33. Shift fork end face; 34. Shift fork interference point; 4. Sensing component; 41. Housing; 42. Circuit board; 43. Secondary positioning post mechanism; 431. Buckle; 432. Secondary positioning interference block. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] Example 1, please refer to Figure 1-4 The present invention provides the following technical solution: Specifically, it refers to a braking device with a pedal travel sensor that integrates anti-rotation and positioning functions; see [reference]. Figure 1-2The system includes a valve block 1, which provides an installation environment for the sensor. A piston rod 2 is provided on one side of the valve block 1. The piston rod 2 is used to receive the kinetic energy transmitted by the brake pedal. The piston rod 2 has a push rod and a piston canister. A fixing groove is provided on the outer wall of the piston canister near the push rod. A magnet assembly 3 is provided on one side of the piston canister. The magnet assembly 3 is used to sense the movement position of the piston inside the piston rod 2. A sensing component 4 is provided on the side of the magnet assembly 3 away from the piston rod 2. The sensing component 4 is used to sense the state of the magnet inside the magnet assembly 3 and output displacement stroke data. The piston rod 2, the magnet assembly 3, and the sensing component 4 are all partially located inside the valve block 1. The magnet assembly 3 and the sensing component 4 constitute a pedal stroke sensor.

[0026] A pedal travel sensor that integrates anti-rotation and positioning functions, see [link / reference]. Figure 3 The magnet assembly 3 includes a plastic housing 31. A fork 32 is disposed on the side of the plastic housing 31 near the fixing groove. Multiple sets of interference points 34 are disposed on the surface of the fork 32. The fork 32 has an arc-shaped structure. Two sets of fork end faces 33 are disposed on the side of the fork 32 away from the plastic housing 31. The angle formed by the two sets of fork end faces 33 and the center of the fork 32 is not greater than 180°. The multiple sets of interference points 34 are arranged in a ring around the center of the fork 32.

[0027] Specifically, when the magnet assembly 3 is externally fixed to the piston rod 2, a fork plate 32 with an included angle of no more than 180° is used to prevent the fixed magnet assembly 3 from falling off the piston rod 2 before it is pressed into the valve block 1. This facilitates installation by operators during production and improves their installation efficiency. At the same time, multiple sets of fork interference points 34 are provided on the surface of the fork plate 32. These multiple sets of fork interference points 34 are interference-fitted with the fixing groove. After the magnet assembly 3 and the piston rod 2 are pressed together, the axial movement of the magnet assembly 3 can be effectively avoided, improving the sensing accuracy of the magnet assembly 3 in sensing the piston position inside the piston rod 2, thereby improving the detection accuracy of the pedal stroke sensor.

[0028] See Figure 4 The sensing component 4 includes a housing 41, which provides an installation environment for the circuit board 42. The circuit board 42 is mounted on the housing 41 and is used to sense the magnet inside the magnet assembly 3 and calculate the displacement stroke data. A connector is provided on the side of the housing 41 away from the valve block 1, which connects to an external central processing unit to transmit the displacement stroke data generated by the circuit board 42 to the central processing unit. A secondary positioning post mechanism 43 is provided on the side of the housing 41 near the connector, and the secondary positioning post mechanism 43 is located inside the valve block 1. The secondary positioning post mechanism 43 includes a latch 431, and two sets of secondary positioning interference blocks 432 are provided on the side of the latch 431 near the connector.

[0029] The valve block has a snap-fit ​​groove inside. The snap-fit ​​431 engages with the snap-fit ​​groove of the valve block to prevent the pedal stroke sensor from falling off. Two sets of secondary positioning interference blocks 432 are slightly interference-fitted with the valve block to prevent the pedal stroke sensor from rotating. The slight interference fit between the outer shell 41 and the valve block ensures the coaxiality of the pedal stroke sensor. By reducing the gap of the overall movement of the sensing component 4 through the above methods, the detection accuracy of the pedal stroke sensor is improved. The sensing component 4 is integrally molded, reducing production costs.

[0030] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A pedal travel sensor integrating anti-rotation and positioning, characterized in that: It includes a magnet assembly (3), and a sensing component (4) is provided on one side of the magnet assembly (3); The magnet assembly (3) includes a plastic housing (31), one end of which is provided with a fork (32), and the surface of the fork (32) is provided with multiple sets of fork interference points (34).

2. The pedal travel sensor integrating anti-rotation and positioning according to claim 1, characterized in that: The fork (32) has an arc-shaped structure. Two sets of fork end faces (33) are provided on the side of the fork (32) away from the plastic shell (31). The angle formed by the two sets of fork end faces (33) and the center of the fork (32) is no greater than 180°.

3. A pedal travel sensor integrating anti-rotation and positioning according to claim 2, characterized in that: The multiple sets of interference points (34) of the shift fork are arranged in a ring around the center of the shift fork piece (32).

4. A pedal travel sensor integrating anti-rotation and positioning as described in claim 1, characterized in that: The sensing component (4) includes a housing (41) on which a circuit board (42) is mounted, and a connector is provided on the side of the housing (41) away from the circuit board (42).

5. A pedal travel sensor integrating anti-rotation and positioning according to claim 4, characterized in that: The outer casing (41) is provided with a secondary positioning column mechanism (43) on the side near the connector.

6. A pedal travel sensor integrating anti-rotation and positioning according to claim 5, characterized in that: The secondary positioning column mechanism (43) includes a buckle (431), and the buckle (431) is provided with two sets of secondary positioning interference blocks (432) near the connector.

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