Electronic brake pedal

Abstract

The utility model discloses an electronic brake pedal which comprises a base, a pedal arm, a rotating shaft and a sensor module. The pedal arms are installed on the base through rotating shafts respectively, a first spring seat is installed on the base, a second spring seat located above the first spring seat is further installed on the rotating shafts, outer springs are installed between the pedal arms and the second spring seat, and bottom springs are installed between the second spring seat and the base. The pedal arm rotates to drive the second spring seat to rotate, in the rotating process of the pedal arm and the second spring seat, the bottom spring acts firstly, and after the second spring seat rotates to the tail position, the outer spring starts to act; the sensor module is installed on the base and can sense rotation of the pedal arm. The sensor module is connected with the ECU control unit. The electronic brake pedal can simulate a force curve of a traditional mechanical brake during braking, so that the foot feeling of the electronic brake is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive parts, and particularly relates to an electronic brake pedal. Background Art

[0002] The traditional braking system uses a vacuum booster to convert the braking pedal force stepped on by a person into hydraulic pressure, drive the hydraulic oil, and provide braking force for the brake pads. With the development of automotive electrification and intelligence and the drive of the trend of automated driving, the maturity and industry penetration rate of the electronic braking system are accelerating. Compared with the traditional braking system, the electronic braking system does not require a booster and a hydraulic system, saves space, reduces the weight of the whole vehicle, reduces the braking reaction time, can greatly shorten the braking distance, has very prominent safety advantages, and is convenient for integrating electronic parking, anti-lock braking, braking force distribution, etc.

[0003] The braking pedal in the braking system, that is, the brake pedal, is used for decelerating and stopping the vehicle. It is one of the five major operating parts of vehicle driving and is used very frequently. How well the driver controls the brake pedal directly affects vehicle driving safety. In the electronic braking system, the electronic brake pedal converts the driver's braking intention into an electrical signal through the stepping force and stepping stroke, transmits it to the ECU, and then controls mechanical components to achieve braking through the ECU.

[0004] The existing electronic brake pedals still have great deficiencies in the foot feeling feedback, making it difficult for the driver to obtain the foot feeling of mechanical braking; therefore, it is necessary to develop an electronic brake pedal that can simulate the foot feeling of mechanical braking to improve the driver's braking foot feeling. Content of the Utility Model

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an electronic brake pedal that can simulate the force curve of traditional mechanical braking during braking, so as to improve the foot feeling of electronic braking.

[0006] To achieve the above technical purpose and reach the above technical effect, the utility model is realized through the following technical solutions:

[0007] An electronic brake pedal includes a base, a pedal arm, a rotating shaft, and a sensor module;

[0008] The pedal arm is respectively installed on the base through the rotating shaft. A first spring seat is installed on the base, and a second spring seat located above the first spring seat is also installed on the rotating shaft. An outer spring is installed between the pedal arm and the second spring seat, and a bottom spring is installed between the second spring seat and the base; when the pedal arm rotates, it can drive the second spring seat to rotate; during the rotation of the pedal arm and the second spring seat, the bottom spring acts first, and when the second spring seat rotates to the end position, the outer spring starts to act;

[0009] The sensor module is installed on the base and can sense the rotation of the pedal arm; the sensor module is connected to the ECU control unit.

[0010] Furthermore, the rotating shaft is fixedly installed at one end of the base, the non-pedaling part of the pedal arm is rotatably connected to the rotating shaft, and both the bottom spring and the outer spring are arranged below the pedal part of the pedal arm.

[0011] Furthermore, the electronic brake pedal further includes a force lag mechanism, which includes a force lag rod and a friction plate. The force lag rod is rotatably installed on the rotating shaft, and the friction plate is fixed on the force lag rod; when the pedal arm rotates, it can drive the force lag rod to rotate, and the friction plate can act on the rotating shaft.

[0012] Even further, the force lag rod has a rotating connection part and a rotating arm part. The rotating connection part is rotatably connected to the rotating shaft, and the rotating arm part is located below the pedal arm.

[0013] Even further, the second spring seat includes a connecting arm part sleeved on the rotating shaft and a spring seat part extending forward. The connecting arm part is connected to the rotating connection part of the force lag rod.

[0014] Furthermore, an inner spring is installed between the pedal arm and the first spring seat, and the inner spring is located inside the outer spring.

[0015] Furthermore, an elastic rod extends from the bottom of the pedal part of the pedal arm. After the pedal arm rotates to the end position, the elastic rod can act on the base.

[0016] Furthermore, a rotor is rotatably installed on the rotating shaft. A magnet and a metal sheet are also installed on the rotor. The sensor module is installed at a position on the base corresponding to the rotor, and the rotor is connected to the pedal arm, and the pedal arm can drive the rotor to rotate.

[0017] Even further, the rotor has a disc part and an extending arm part. The magnet is installed on the extending arm part of the rotor, the metal sheet is installed on the disc part of the rotor, the disc part of the rotor is axially connected to the rotating shaft, and the extending arm part is connected to the pedal arm.

[0018] Even further, the sensor module includes a sensor body, a printed circuit board and a sensor cover plate. A Hall sensor and an inductive sensor are matched on the printed circuit board; when the rotor rotates, it drives the magnet and the metal sheet to rotate, causing corresponding changes in the electrical signals of the Hall sensor and the inductive sensor.

[0019] The beneficial effects of the present utility model are:

[0020] The electronic brake pedal of the utility model can convert the driver's braking intention into an electrical signal through the pedal force and pedal stroke and transmit it to the ECU, and the ECU then controls the mechanical components to achieve braking. Specifically, when the driver steps on the pedal arm, the pedal arm rotates around the rotating shaft and drives the rotor to rotate at the same time. The rotation of the magnet and metal sheet installed on the rotor will cause the signal of the sensor module to change according to the set value. These signals will be transmitted to the ECU, and the ECU can achieve braking through the mechanical components.

[0021] When braking, the pedal arm is pressed down and the bottom spring acts. When the second spring seat rotates to the last position, the outer spring starts to act. The bottom spring and the outer spring have different stiffnesses, thereby providing two return strokes with different slopes. When the pedal arm is pressed to the bottom, the elastic rod on the pedal arm generates feedback to form another return stroke with a different slope. Therefore, the braking process can generate a force curve simulating a mechanical brake, thereby obtaining the foot feel of a mechanical brake and improving the foot feel of an electronic brake.

[0022] In addition, the utility model is provided with a force hysteresis mechanism. When the driver steps on the pedal arm, the pedal arm acts on the force hysteresis rod, and the pedal arm drives the force hysteresis rod to rotate. Under the action of the spring, friction is generated between the friction plate and the rotating shaft, resulting in force hysteresis. The force hysteresis effect can provide better pedal force feedback effect and improve the user's driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the electronic brake pedal of the present utility model.

[0024] Figure 2 It is a partial structural schematic diagram of the electronic brake pedal of the utility model.

[0025] Figure 3 for Figure 2 Schematic diagram of another view of the structure shown.

[0026] Figure 4 It is a structural schematic diagram of the pedal arm in the electronic brake pedal of the utility model.

[0027] Figure 5 It is a structural schematic diagram of the second spring seat in the electronic brake pedal of the utility model.

[0028] Figure 6 It is a structural schematic diagram of the cooperation between the force lag mechanism and the second spring seat in the electronic brake pedal of the utility model.

[0029] Figure 7 It is a schematic structural diagram of the rotor in the electronic brake pedal of the utility model.

[0030] In the figure, 1: base; 2: pedal arm, 201: connecting ring part, 202: flange; 3: rotating shaft; 4: sensor module; 5: first spring seat; 6: second spring seat, 601: connecting arm part, 602: spring seat part; 7: inner spring; 8: outer spring; 9: force lag rod, 901: rotating connection part, 902: rotating arm part, 903: boss; 10: friction plate; 11: rotor, 1101: disc part, 1102, extending arm part, 1103: connecting rod; 12: magnet; 13: metal sheet; 14: bottom spring; 15: elastic rod. Detailed implementation mode

[0031] The following elaborates on the preferred embodiments of the present utility model in conjunction with the attached drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0033] As Figures 1 to 7 shown in a preferred embodiment of an electronic brake pedal, it includes a base 1, a pedal arm 2, a rotating shaft 3, and a sensor module 4.

[0034] The rotating shaft 3 is fixedly installed at one end of the base 1, and the non - stepping part of the pedal arm 2 is rotatably connected to the rotating shaft 3 to install the pedal arm 2 on the base 1.

[0035] A first spring seat 5 is installed on the base 1, and a second spring seat 6 located above the first spring seat 5 is also installed on the rotating shaft 3. An inner spring 7 is installed between the pedal arm 2 and the first spring seat 5, an outer spring 8 is installed between the pedal arm 2 and the second spring seat 6, and the inner spring 7 is located inside the outer spring 8; a bottom spring 14 is installed between the second spring seat 6 and the base 1. The inner spring 7, the outer spring 8, and the bottom spring 14 are all located below the pedal part of the pedal arm 2; in the present utility model, the inner spring 7, the outer spring 8, and the bottom spring 14 are all arranged in one position, thereby saving costs and space.

[0036] When the pedal arm 2 rotates, it can drive the second spring seat 6 to rotate. During the rotation of the pedal arm 2 and the second spring seat 6, the bottom spring 14 acts first, and the inner spring 7 acts together. When the second spring seat 6 rotates to the end position, the outer spring 8 starts to act.

[0037] The sensor module 4 is installed on the base 1 and can sense the rotation of the pedal arm 2; the sensor module 4 is connected to the ECU control unit.

[0038] The electronic brake pedal further includes a hysteresis mechanism, which includes a hysteresis rod 9 and a friction plate 10. The hysteresis rod 9 has a rotation connection portion 901 and a rotation arm portion 902. The rotation connection portion 901 is rotationally connected to the rotating shaft 3, and the rotation arm portion 902 is located below the pedal arm 2. The friction plate 10 is fixed to the inner side of the rotation connection portion of the hysteresis rod 9; when the pedal arm 2 rotates, it can drive the hysteresis rod 9 to rotate, and the friction plate 10 can act on the rotating shaft.

[0039] More specifically, the non-pedaling portion of the pedal arm 2 has two connection ring portions 201 rotationally connected to the rotating shaft 3, and a flange 202 is connected between the two connection ring portions 201; the rotation connection portion 901 of the hysteresis rod 9 is located between the two connection ring portions 201 of the pedal arm 2, and a boss 903 is provided on the outer wall of the rotation connection portion 901 of the hysteresis rod 9; the boss 903 of the hysteresis rod 9 abuts against the flange 202 of the pedal arm 2.

[0040] The second spring seat 6 includes a connection arm portion 601 sleeved on the rotating shaft 3 and a spring seat portion 602 extending forward; an annular groove is provided on the rotation connection portion 901 of the hysteresis rod 9, and the connection arm portion 601 of the second spring seat 6 is clamped in the annular groove of the hysteresis rod 9. The outer spring 8 is arranged on the spring seat portion 602 of the second spring seat 6, and the bottom spring 14 is arranged between the spring seat portion 602 of the second spring seat 6 and the base 1; the inner spring 7 passes through the spring seat portion 602 of the second spring seat 6.

[0041] Two downwardly extending elastic rods 15, which are rubber rods, are further installed at the bottom of the pedal portion of the pedal arm 2. After the pedal arm 2 rotates to the end position, the elastic rods 15 can act on the base 1 to form a force feedback.

[0042] A rotor 11 is rotatably installed on the rotating shaft 3. A magnet 12 and a metal sheet 13 are further installed on the rotor 11. The sensor module 4 is installed at a position on the base 1 corresponding to the rotor, and the rotor 11 is connected to the pedal arm 2, and the pedal arm 2 can drive the rotor 11 to rotate.

[0043] More specifically, as Figure 7As shown, the rotor 11 has a disc portion 1101 and a protruding arm portion 1102. The magnet 12 is mounted on the protruding arm portion 1102 of the rotor 11, and the metal sheet 13 is mounted on the disc portion 1101 of the rotor 11. The disc portion 1101 of the rotor 11 is pivotally connected to the rotating shaft 3 to achieve the rotational mounting of the rotor 11 and the rotating shaft 3. The non-step portion of the pedal arm 2 has a connection hole, and the protruding arm portion 1102 of the rotor 11 is connected to the connection hole of the pedal arm 2 through a connecting rod 1103.

[0044] An installation cavity is provided at the position of the base 1 corresponding to the rotor, and the sensor module 4 is installed in the installation cavity of the base 1. The sensor module 4 can sense the rotation of the pedal arm 2 through the rotation of the magnet 12 and the metal sheet 113 on the rotor 11. The sensor module 4 is connected to the ECU control unit. The sensor module includes a sensor body, a printed circuit board, and a sensor cover plate. A Hall sensor and an inductive sensor are matched on the printed circuit board. When the rotor rotates, it drives the magnet and the metal sheet to rotate, causing corresponding changes in the electrical signals of the Hall sensor and the inductive sensor.

[0045] During use, when the driver steps on the pedal arm, the pedal arm 2 rotates around the rotating shaft 3, and at the same time drives the rotor 11 to rotate. The rotation of the magnet 12 and the metal sheet 13 mounted on the rotor 11 will cause the signals of the sensor module 4 to change according to the set values. These signals are transmitted to the ECU, and the ECU can then achieve braking through mechanical components (calipers controlled by four wheel-end motors).

[0046] When braking, when the pedal arm 2 is stepped on, the second spring seat 6 and the force lag rod 9 also rotate accordingly. When the pedal arm 2 is stepped on, the bottom spring 14 acts first, and the inner spring 7 acts together. When the second spring seat 6 rotates to the end position, the outer spring 8 begins to act. The stiffness of the bottom spring 14 is smaller, and the stiffness of the outer spring 8 is larger. Thus, the different stiffnesses and action times of the two springs provide two return strokes with different slopes. And when the pedal arm 2 is stepped on to the end, the more rigid elastic rod 15 mounted on the pedal arm 2 generates feedback, forming a third return stroke with a larger slope, so that the entire braking process can generate a force curve simulating mechanical braking, obtaining the foot feeling of mechanical braking and improving the foot feeling of electronic braking. In addition, the inner spring 7 therein plays a redundant role to enable the pedal arm 2 to return to its original position when the outer spring 8 fails.

[0047] In addition, the present utility model is provided with a force lag mechanism. When the driver steps on the pedal arm 2, the pedal arm 2 acts on the force lag rod 9, and the pedal arm 2 drives the force lag rod 9 to rotate. Under the action of the spring, a frictional force is generated between the friction plate 10 and the rotating shaft 3, generating a force lag. The force lag effect can provide a better pedal force feedback effect and improve the driving comfort of the user.

[0048] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. An electronic brake pedal, characterized in that: It includes a base, a pedal arm, a rotating shaft and a sensor module; The pedal arm is respectively installed on the base through the rotating shaft. A first spring seat is installed on the base, and a second spring seat above the first spring seat is also installed on the rotating shaft. An outer spring is installed between the pedal arm and the second spring seat, and a bottom spring is installed between the second spring seat and the base; when the pedal arm rotates, it can drive the second spring seat to rotate; during the rotation of the pedal arm and the second spring seat, the bottom spring acts first, and when the second spring seat rotates to the end position, the outer spring starts to act; The sensor module is installed on the base and can sense the rotation of the pedal arm; the sensor module is connected to the ECU control unit.

2. The electronic brake pedal according to claim 1, characterized in that: The rotating shaft is fixedly installed at one end of the base, the non-treading part of the pedal arm is rotatably connected to the rotating shaft, and both the bottom spring and the outer spring are arranged below the pedal part of the pedal arm.

3. An electronic brake pedal according to claim 1, characterized in that: It further includes a force hysteresis mechanism, which includes a force hysteresis rod and a friction plate. The force hysteresis rod is rotatably installed on the rotating shaft, and the friction plate is fixed on the force hysteresis rod; when the pedal arm rotates, it can drive the force hysteresis rod to rotate, and the friction plate can act on the rotating shaft.

4. An electronic brake pedal according to claim 3, characterized in that: The force hysteresis rod has a rotation connection part and a rotation arm part. The rotation connection part is rotatably connected to the rotating shaft, and the rotation arm part is located below the pedal arm.

5. An electronic brake pedal according to claim 4, characterized in that: The second spring seat includes a connecting arm part sleeved on the rotating shaft and a spring seat part extending forward, and the connecting arm part is connected to the rotation connection part of the force hysteresis rod.

6. An electronic brake pedal according to claim 1, characterized in that: An inner spring is installed between the pedal arm and the first spring seat, and the inner spring is located inside the outer spring.

7. An electronic brake pedal according to claim 1, characterized in that: An elastic rod extends out at the bottom of the pedal part of the pedal arm. After the pedal arm rotates to the end position, the elastic rod can act on the base.

8. An electronic brake pedal according to claim 1, characterized in that: A rotor is rotatably installed on the rotating shaft, and a magnet and a metal sheet are also installed on the rotor. The sensor module is installed at the position corresponding to the rotor on the base, and the rotor is connected to the pedal arm, and the pedal arm can drive the rotor to rotate.

9. An electronic brake pedal according to claim 8, wherein: The rotor has a disc part and an extending arm part. The magnet is installed on the extending arm part of the rotor, and the metal sheet is installed on the disc part of the rotor. The disc part of the rotor is axially connected to the rotating shaft, and the extending arm part is connected to the pedal arm.

10. An electronic brake pedal according to claim 8, characterized in that: The sensor module includes a sensor body, a printed circuit board and a sensor cover plate. A Hall sensor and an inductive sensor are matched on the printed circuit board; when the rotor rotates, it drives the magnet and the metal sheet to rotate, causing corresponding changes in the electrical signals of the Hall sensor and the inductive sensor.

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