Brake pedal position sensor with touch switch

Abstract

The brake pedal position sensor with the touch switch comprises a sensor shell, a PCB and a rotating shaft are installed 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; through cooperation of the touch switch and the sensing chip, dual detection of a touch switch signal and a position detection signal is achieved, the detection accuracy of the position sensor on the state of the brake pedal is improved, and the rocker arm drives the rotating shaft to rotate in the process of treading the brake pedal; 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 invention relates to the technical field of position sensors, and in particular to a brake pedal position sensor with a touch switch. Background Art

[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 driver's braking needs, and it is necessary to diagnose whether the brake pedal signal is normal.

[0003] In the prior art, the brake pedal position is usually determined by obtaining the brake pedal position signal voltage. If the brake pedal position signal voltage reaches a preset range, it is determined that the brake pedal begins to be depressed. However, due to factors such as installation deviation, brake pedal aging, signal drift, etc., even if the brake pedal position signal voltage is within the preset range, there may still be abnormal brake pedal position. In some occasions where direct detection of the brake pedal state is required, the response may not be accurate or timely, which poses a great safety hazard to driving safety. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a brake pedal position sensor with a touch switch, which can detect the position travel of the brake pedal and whether the brake pedal is stepped on, thereby improving the response speed and safety of the sensor.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A brake pedal position sensor with a touch switch comprises 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; a sensor chip for sensing and calculating the rotation angle of the rotating shaft and a touch switch for realizing switching as the rotating shaft rotates are respectively installed on the PCB board near the end of the rotating shaft, and the sensor chip is arranged corresponding to the center of the rotating shaft.

[0007] In the above-mentioned brake pedal position sensor with a touch switch, the sensor chip adopts a Hall sensor element, and the top end of the rotating shaft is provided with a magnetic material that cooperates with the Hall sensor element to sense the change of the magnetic field.

[0008] The above-mentioned brake pedal position sensor with a touch switch is provided with a touch switch button, and the touch switch button is a hemispherical structure.

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

[0010] In 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 opened 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 scheme, the technical progress achieved by the present invention is as follows.

[0012] The present invention provides a brake pedal position sensor with a touch switch, which realizes dual detection of contact switch signals and position detection signals through the cooperation of the touch switch and the sensor chip, thereby improving the detection accuracy of the position sensor on the brake pedal state. When the brake pedal is stepped on, the rotating shaft is driven to rotate by the rocker arm, and the touch switch is opened by rotating the blade to judge whether the pedal is stepped on in place. At the same time, the rotation angle of the rotating shaft is calculated through the cooperation of the sensor chip and the magnetic material on the top of the rotating shaft, thereby 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 invention responds quickly and can trigger a signal immediately when a slight change occurs in the pedal position. It is suitable for various automobile braking systems that need to detect the state of the brake pedal, improves the response speed, and reduces the size of the sensor by optimizing and integrating the position detection and touch switch assembly structure design, making installation easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the specific structure of the present invention; Figure 2 A top view of the present invention; Figure 3 It is a schematic diagram of the specific structure of the rotating shaft of the present invention; Figure 4 It is a schematic diagram of the structure in which the inclined guide surface contacts the touch switch button during the rotation process of the rotating shaft according to the present invention; Figure 5 It is a structural schematic diagram of pressing the touch switch button during the rotation of the shaft of the present invention.

[0015] Among them: 1. sensor housing, 2. PCB board, 3. sensor chip, 4. touch switch, 5. rotating shaft, 6. bearing, 7. rocker arm, 8. sealing ring, 9. rotating blade, 10. inclined guide surface, 11. touch switch button, 12. magnetic material. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0017] A brake pedal position sensor with a touch switch, such as Figures 1 to 5 As shown, it includes a sensor housing 1, in which a PCB board 2 and a rotating shaft 5 are respectively installed. 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.

[0018] 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.

[0019] A sensor chip 3 and a touch switch 4 are respectively mounted on the PCB board 2 near the end of the rotating shaft 5 , wherein the sensor chip 3 is arranged corresponding to the center of the rotating shaft 5 .

[0020] The sensor chip 3 adopts a Hall sensor element, and a magnetic material 12 is arranged on the top of the rotating shaft 5 .

[0021] When the shaft 5 rotates, the magnetic field will change due to the magnetic material on the top of the shaft. The sensor chip senses the strength and direction of the magnetic field through the Hall sensor element and calculates the rotation angle of the shaft based on the strength and direction of the magnetic field.

[0022] The touch switch 4 is provided with a touch switch button 11 for cooperating with the rotating shaft to rotate and open the touch switch 4 . The touch switch button 11 is a hemispherical structure.

[0023] The rotating shaft 5 is installed in the sensor housing 1 through the bearing 6, and an annular groove is provided on the circumferential side wall of the rotating shaft 5, and a sealing ring 8 for sealing is installed in the annular groove.

[0024] The upper circumference of the rotating shaft 5 is provided with fan-shaped rotating blades 9. Figure 3 As shown, an inclined guide surface 10 for guiding the touch switch button 11 is provided at one end of the rotating blade 9 .

[0025] When the pedal is not stepped on, the touch switch button 11 is close to the inclined guide surface 11. When the brake pedal is stepped on, the brake pedal drives the rocker arm 7 to rotate, and the rocker arm 7 drives the rotating shaft 5 and the rotating blade 9 to rotate. At the same time, the inclined guide surface 10 on the rotating blade 9 gradually contacts and begins to press the touch switch button 11 downward (refer to Figure 4 The rotation displacement of the rotating blade is converted into the downward displacement of the touch switch button 11 until the touch switch button 11 contacts the horizontal surface of the rotating blade 9 (refer to Figure 5 In the state shown), the touch switch button 11 is pressed into place, at this time, the touch switch is turned on, and it is detected that the brake pedal is stepped into place.

[0026] The sensor chip 3 senses the change in the intensity and direction of the magnetic field during the rotation of the shaft and calculates the rotation angle of the shaft to obtain the travel of the brake pedal.

[0027] When the brake pedal is released, the rotating shaft is driven to rotate in the opposite direction. At this time, the rotating blade 9 releases the pressure on the touch switch button 11 and closes the touch switch. Example

[0028] On the basis of Example 1, the touch switch button 11 is provided with an elastic metal sheet in contact with the rotating blade 9. When the rotating blade 9 rotates, the inclined guide surface 10 of the rotating blade gradually presses the elastic metal sheet until the horizontal surface of the rotating blade 9 contacts the elasticity, indicating that the touch switch 11 is pressed to open. When the brake pedal is released, the rotating blade cancels the pressing of the touch switch button and automatically resets under the drive of the elastic metal sheet 11, so that the touch switch is closed.

[0029] The present invention provides a brake pedal position sensor with a touch switch, which realizes dual detection of contact switch signals and position detection signals through the cooperation of the touch switch and the sensor chip, thereby improving the detection accuracy of the position sensor on the brake pedal state. When the brake pedal is stepped on, the rotating shaft is driven to rotate by the rocker arm, and the touch switch is opened by rotating the blade to judge whether the pedal is stepped on in place. At the same time, the rotation angle of the rotating shaft is calculated through the cooperation of the sensor chip and the magnetic material on the top of the rotating shaft, thereby solving the problem of inaccurate and untimely response of the brake pedal position signal in the prior art.

[0030] The touch switch of the present invention responds quickly and can trigger a signal immediately when a slight change occurs in the pedal position. It is suitable for various automobile braking systems that need to detect the state of the brake pedal, improves the response speed, and reduces the size of the sensor by optimizing and integrating the position detection and touch switch assembly structure design, making installation easier.

Claims

1. A brake pedal position sensor with a touch switch, characterized in that: The invention comprises a sensor housing (1), wherein a PCB board (2) and a rotating shaft (5) are respectively installed inside the sensor housing (1), the bottom of the rotating shaft (5) protrudes from 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 angle of the rotating shaft and a touch switch (4) for realizing switching as the rotating shaft rotates are respectively installed on the PCB board (2) near the end of the rotating shaft (5), and the sensor chip (3) and the center of the rotating shaft (5) are arranged correspondingly; the rotating shaft (5) is installed in the sensor housing (1) through a bearing (6), and an annular groove is opened on the circumferential side wall of the rotating shaft (5), and a sealing ring (8) for sealing is installed in the annular groove.

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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