Brake pedal position sensor with touch switch

Abstract

The utility model discloses a brake pedal position sensor with a touch switch, which comprises a sensor shell, a PCB (printed circuit board) and a rotating shaft are respectively mounted in the sensor shell, the bottom of the rotating shaft extends out of the sensor shell and is connected with a rocker arm, and the rocker arm is connected with a brake pedal; the PCB close to the end part of the rotating shaft is respectively provided with a sensing chip for sensing and calculating the rotating angle of the rotating shaft and a touch switch for switching along with the rotation of the rotating shaft, and the sensing chip is arranged corresponding to the center of the rotating shaft; according to the utility model, through the cooperation of the touch switch and the sensing chip, the dual detection of a touch switch signal and a position detection signal is realized, and the detection accuracy of the position sensor on the state of the brake pedal is improved; whether the pedal is treaded in place or not is judged by turning on the touch switch through the rotating blade, and meanwhile the rotating angle of the rotating shaft is calculated through cooperation of the sensing chip and the magnetic material on the top of the rotating shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of position sensors, and particularly relates to a brake pedal position sensor with a touch switch. Background Technique

[0002] In electric vehicles, the brake pedal signal is one of the important input signals for electric vehicle control. The brake pedal signal must be able to accurately reflect the current braking demand of the driver, and at the same time, it is necessary to diagnose whether the brake pedal signal is normal.

[0003] In the prior art, usually, by obtaining the voltage of the brake pedal position signal, the depressed position of the brake pedal is judged. If the voltage of the brake pedal position signal reaches within the preset interval range, it is determined that the brake pedal starts to be depressed. However, due to the influence of factors such as installation deviation, brake pedal aging, signal drift, etc., even if the voltage of the brake pedal position signal is within the preset interval range, there will still be abnormal brake pedal positions, and the reaction may not be accurate enough or the response may not be timely in some occasions where the state of the brake pedal needs to be directly detected, thus posing a relatively large potential safety hazard to driving safety. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a brake pedal position sensor with a touch switch, which can detect the position stroke of the brake pedal and detect whether the brake pedal is depressed, and improve the response speed and safety of the sensor.

[0005] To solve the above technical problems, the following technical solutions are adopted in the utility model.

[0006] A brake pedal position sensor with a touch switch includes a sensor housing. A PCB board and a rotating shaft are respectively installed inside the sensor housing. The bottom of the rotating shaft extends out of the sensor housing and is connected to a rocker arm, and the rocker arm is connected to the brake pedal; on the PCB board near the end of the rotating shaft, a sensing chip for sensing and calculating the rotation angle of the rotating shaft and a touch switch for realizing the switch as the rotating shaft rotates are respectively installed, and the sensing chip is arranged corresponding to the center of the rotating shaft.

[0007] For the above brake pedal position sensor with a touch switch, the sensing chip adopts a Hall sensing element, and a magnetic material for cooperating with the Hall sensing element to sense the magnetic field change is arranged at the top of the rotating shaft.

[0008] For the above brake pedal position sensor with a touch switch, a touch switch button is arranged on the touch switch, and the touch switch button has a hemispherical structure.

[0009] For the above-mentioned brake pedal position sensor with a touch switch, a sector-shaped rotating blade is arranged on the peripheral side of the upper part of the rotating shaft, and an inclined guiding surface for guiding the touch switch button is arranged at one end of the rotating blade.

[0010] For the above-mentioned brake pedal position sensor with a touch switch, the rotating shaft is installed in the sensor housing through a bearing, and an annular groove is formed on the circumferential side wall of the rotating shaft, and a sealing ring for sealing is installed in the annular groove.

[0011] Due to the adoption of the above technical solutions, the following technical progress is achieved by the present utility model.

[0012] The present utility model provides a brake pedal position sensor with a touch switch, which realizes double detection of contact switch signals and position detection signals through the cooperation of the touch switch and the sensing chip, improves the detection accuracy of the position sensor for the state of the brake pedal. During the process of stepping on the brake pedal, the rotating shaft is driven to rotate by the rocker arm, and the touch switch is opened by the rotating blade to judge whether the pedal is stepped in place. At the same time, the rotation angle of the rotating shaft is calculated by the cooperation of the sensing chip and the magnetic material at the top of the rotating shaft, solving the problem of inaccurate and untimely response of the brake pedal position signal in the prior art.

[0013] The touch switch of the present utility model has a fast response and can trigger a signal immediately when there is a slight change in the pedal position. It is applicable to various automotive braking systems that need to detect the state of the brake pedal, improves the response speed, and also reduces the volume of the sensor and facilitates installation by optimizing and integrating the position detection and touch switch assembly structure design. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the present utility model;

[0015] Figure 2 It is a top view of the present utility model;

[0016] Figure 3 It is a schematic structural diagram of the rotating shaft of the present utility model;

[0017] Figure 4 It is a schematic structural diagram of the contact between the inclined guiding surface and the touch switch button during the rotation of the rotating shaft of the present utility model;

[0018] Figure 5 It is a schematic structural diagram of pressing the touch switch button during the rotation of the rotating shaft of the present utility model.

[0019] Wherein: 1. Sensor housing, 2. PCB board, 3. Sensing chip, 4. Touch switch, 5. Rotating shaft, 6. Bearing, 7. Rocker arm, 8. Sealing ring, 9. Rotating blade, 10. Inclined guiding surface, 11. Touch switch button, 12. Magnetic material. Detailed implementation manners

[0020] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. Embodiment

[0021] A brake pedal position sensor with a touch switch, as Figures 1 to 5 shown, includes a sensor housing 1, a PCB board 2 and a rotating shaft 5 are respectively installed inside the sensor housing 1, the bottom of the rotating shaft 5 extends out of the sensor housing 1 and is connected to a rocker arm 7, and the rocker arm 7 is connected to the brake pedal.

[0022] The connection structure between the rocker arm 7 and the brake pedal is a conventional mechanical structure known to those skilled in the art, and will not be described in detail herein.

[0023] A sensing chip 3 and a touch switch 4 are respectively installed on the PCB board 2 near the end of the rotating shaft 5, wherein the sensing chip 3 is arranged corresponding to the center of the rotating shaft 5.

[0024] The sensing chip 3 adopts a Hall sensing element, and a magnetic material 12 is arranged at the top end of the rotating shaft 5.

[0025] When the rotating shaft 5 rotates, due to the magnetic material arranged at the top of the rotating shaft, the magnetic field will change at this time. The sensing chip senses the intensity and direction of the magnetic field through the Hall sensing element, and calculates the rotation angle of the rotating shaft through the intensity and direction of the magnetic field.

[0026] A touch switch button 11 is arranged on the touch switch 4 for cooperating with the rotation of the rotating shaft to turn on the touch switch 4, and the touch switch button 11 has a hemispherical structure.

[0027] The rotating shaft 5 is installed in the sensor housing 1 through a bearing 6, and an annular groove is formed on the circumferential side wall of the rotating shaft 5, and a sealing ring 8 for sealing is installed in the annular groove.

[0028] A fan-shaped rotating blade 9 is arranged on the circumferential side of the upper part of the rotating shaft 5, as Figure 3 shown, and an inclined guiding surface 10 for guiding the touch switch button 11 is arranged at one end of the rotating blade 9.

[0029] When the pedal is in the non-pressed state, the touch switch button 11 is close to the inclined guiding surface 11 at this time. When the brake pedal is pressed, the brake pedal drives the rocker arm 7 to rotate, the rocker arm 7 drives the rotating shaft 5 and the rotating blade 9 to rotate, and at the same time, the inclined guiding surface 10 on the rotating blade 9 gradually contacts and starts to press down the touch switch button 11 (refer to Figure 4 the shown state), converts the rotational displacement of the rotating blade into the downward pressing displacement of the touch switch button 11 until the touch switch button 11 contacts the horizontal plane of the rotating blade 9 (refer to Figure 5In the state shown, the touch switch button 11 is pressed in place. At this time, the touch switch is turned on, and it is detected that the brake pedal is depressed in place.

[0030] The sensing chip 3 can obtain the moving stroke of the brake pedal by sensing the change in the magnetic field intensity and the magnetic field direction during the rotation of the rotating shaft and calculating the rotation angle of the rotating shaft.

[0031] When the brake pedal is released, it drives the rotating shaft to rotate in the reverse direction. At this time, the rotating blade 9 releases the pressing on the touch switch button 11, and the touch switch is closed. Embodiment

[0032] On the basis of Embodiment 1, an elastic metal sheet in contact with the rotating blade 9 is provided on the touch switch button 11. During the rotation of the rotating blade 9, the inclined guide surface 10 of the rotating blade gradually presses the elastic metal sheet until the horizontal plane of the rotating blade 9 is in elastic contact, indicating that the touch switch 11 is pressed and turned on. When the brake pedal is released, the rotating blade cancels the pressing on the touch switch button and automatically resets under the drive of the elastic metal sheet 11, closing the touch switch.

[0033] The utility model provides a brake pedal position sensor with a touch switch. Through the cooperation of the touch switch and the sensing chip, dual detection of the contact switch signal and the position detection signal is realized, improving the detection accuracy of the position sensor for the state of the brake pedal. During the process of stepping on the brake pedal, the rotating shaft is driven to rotate by the rocker arm, and the touch switch is opened by the rotating blade to determine whether the pedal is depressed in place. At the same time, the rotation angle of the rotating shaft is calculated by the cooperation of the sensing chip and the magnetic material at the top of the rotating shaft, solving the problem of inaccurate and untimely response of the brake pedal position signal in the prior art.

[0034] The touch switch of the utility model responds quickly and can immediately trigger a signal when there is a slight change in the pedal position. It is applicable to various automotive braking systems that need to detect the state of the brake pedal, improving the response speed. It also reduces the volume of the sensor and facilitates installation by optimizing and integrating the position detection and touch switch assembly structure design.

Claims

1. A brake pedal position sensor with a touch switch, characterized in that: The sensor housing (1) comprises a PCB board (2) and a rotating shaft (5) respectively installed inside the sensor housing (1); the bottom of the rotating shaft (5) extends out of the sensor housing (1) and is connected to a rocker arm (7); and the rocker arm (7) is connected to a brake pedal; a sensor chip (3) for sensing and calculating the rotating shaft rotation angle and a touch switch (4) for switching on and off as the rotating shaft rotates are respectively installed on the PCB board (2) near the end of the rotating shaft (5); the sensor chip (3) and the center of the rotating shaft (5) are arranged correspondingly.

2. The brake pedal position sensor with a touch switch according to claim 1, characterized in that: The sensor chip (3) adopts a Hall sensor element, and the top end of the rotating shaft (5) is provided with a magnetic material (12) that cooperates with the Hall sensor element to sense changes in the magnetic field.

3. The brake pedal position sensor with a touch switch according to claim 1, characterized in that: The touch switch (4) is provided with a touch switch button (11), and the touch switch button (11) is in a hemispherical structure.

4. The brake pedal position sensor with a touch switch according to claim 3, characterized in that: A fan-shaped rotating blade (9) is arranged on the circumferential side of the upper portion of the rotating shaft (5), and an inclined guide surface (10) for guiding the touch switch button (11) is arranged at one end of the rotating blade (9).

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