Integrated electronic brake pedal mechanism and brake system thereof

Abstract

The utility model relates to the field of automobile pedals, and discloses an integrated electronic brake pedal mechanism and a brake system thereof. The pedal arm is hinged to the pedal base through a rotating shaft; the pedal simulator assembly is arranged in the pedal base and used for providing a pedal feeling for a driver, and the pedal simulator assembly is connected with the pedal arm through a ball push rod; the pedal displacement sensor is mounted on the pedal base; and the pedal angle sensor is mounted in the pedal base and is coaxial with the rotating shaft. The device is applied to an EMB braking system, a pedal angle signal and a push rod displacement signal are mutually verified, safety redundancy backup is achieved, and higher functional safety requirements are met. And meanwhile, the mechanism is provided with the pedal simulator, so that a good pedal feeling is provided for a driver. The brake system adopts the integrated electronic brake pedal mechanism.

Description

Technical Field

[0001] The utility model relates to the field of automobile pedals, in particular to an integrated electronic brake pedal mechanism and a brake system thereof. Background Art

[0002] The integrated electronic brake pedal is an advanced automotive braking technology that controls the vehicle's braking system through electronic signals. It has many advantages over traditional hydraulic or mechanical brake systems. Traditional brake pedals are mainly used in conjunction with vacuum boosters, Twobox or Onebox products.

[0003] Currently, there is no brake pedal specifically used for the EMB system in the industry. To match the traditional brake pedal with the EMB system, an independent pedal simulator device must be added, which is costly. Utility Model Content

[0004] The utility model aims to provide an integrated electronic brake pedal mechanism, which is mainly used in an EMB brake system to provide a brake signal for the EMB system and provide a good pedal feel for the driver.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides an integrated electronic brake pedal mechanism, comprising:

[0006] Pedal base;

[0007] A pedal arm is hinged to the pedal base via a rotating shaft;

[0008] A pedal simulator assembly is disposed inside the pedal base and is used to provide a pedal feel for the driver, wherein the pedal simulator assembly is connected to the pedal arm via a ball-end push rod;

[0009] A pedal displacement sensor, mounted on the pedal base; and

[0010] A pedal angle sensor is installed inside the pedal base and is coaxially arranged with the rotating shaft; it is used to provide a push rod displacement signal for the EMB brake system;

[0011] Wherein, the pedal displacement signal and the push rod displacement signal are mutually verified.

[0012] The utility model is mainly used in EMB brake system. The mechanism is equipped with 2 pedal displacement signals, 1 for pedal angle signal and 1 for push rod displacement signal. The 2 signals can be mutually verified to achieve safety redundancy backup and meet higher functional safety requirements. At the same time, the mechanism is equipped with a pedal simulator to provide the driver with a good pedal feel.

[0013] According to an embodiment of the utility model, the pedal displacement sensor is used to provide a pedal displacement signal for the EMB brake system; the pedal displacement sensor is used to provide a push rod displacement signal for the EMB brake system.

[0014] According to an embodiment of the present utility model, the pedal displacement signal and the push rod displacement signal are mutually verified.

[0015] According to an embodiment of the utility model, the pedal arm can rotate around the rotation axis when pedaling.

[0016] According to an embodiment of the utility model, the pedal simulator assembly is installed in the installation cavity of the pedal base, and the pedal simulator assembly includes:

[0017] A ball-end push rod, one end of which is connected to the pedal arm and the other end of which is disposed inside the pedal simulator assembly, wherein the diameter of one end of the ball-end push rod close to the pedal arm is larger than the diameter of the other end;

[0018] A push rod support, disposed in the pedal simulator assembly, for connecting the ball push rod and the piston and transmitting motion from the ball push rod to the piston;

[0019] A piston, comprising a fixed connecting section and an extending section, wherein the piston is fixedly connected to the push rod support via the connecting section, and the piston is slidably connected in the mounting cavity;

[0020] A spring assembly is sleeved on the piston;

[0021] A rubber spring is interference-mounted on a side wall of the mounting cavity away from the ball head push rod and is used for limiting the position of the piston.

[0022] According to an embodiment of the utility model, the spring assembly includes a small spring for providing an initial curve of the pedal feel and a large spring for providing an initial curve of the pedal feel;

[0023] According to the embodiment of the utility model, the shaft retaining ring is clamped at the position of the piston rod portion to limit the axial position of the spring seat, thereby facilitating assembly of the assembly.

[0024] According to an embodiment of the utility model, the spring assembly further includes:

[0025] A spring seat is installed in the installation cavity and is axially limited by a shaft retaining ring. The spring seat is sleeved outside the extension section of the piston and contacts the connecting section of the piston.

[0026] A small spring is sleeved on the piston, one end of the small spring is connected to the piston, and the other end is connected to the spring seat through a rubber pad;

[0027] One end of the large spring is connected to the spring seat through a friction ring, and the other end is fixedly connected to the inner wall of the installation cavity.

[0028] According to the embodiment of the utility model, when the pedal is stepped on, the pedal arm pushes the ball push rod, and the ball push rod support and the piston move forward together, compressing the small spring. When the piston contacts the spring seat, the small spring is no longer compressed. This process is the initial curve of the pedal feel. Continue to step on the pedal downward, and the large spring is further compressed until the piston contacts the rubber spring. This process is the second curve of the pedal feel. Continue to step on the pedal downward, and the large spring is further compressed while the rubber spring is also compressed. This process is the third curve of the pedal feel. The initial curve has a small stiffness, the second curve has a moderate stiffness, and the third curve has a large stiffness, which provides the driver with sufficient support. The three-stage pedal feel curve provides the driver with a good pedal feel.

[0029] According to an embodiment of the utility model, the push rod support includes a hole retaining ring, and a magnet is connected between the hole retaining ring and the piston.

[0030] According to an embodiment of the utility model, the pedal angle sensor comprises:

[0031] An angle magnet assembly is coaxially connected to the rotating shaft via a fastening screw;

[0032] A PCB assembly is arranged opposite to the angle magnet assembly;

[0033] The housing is installed outside the PCB assembly and is used to protect the PCB assembly.

[0034] According to an embodiment of the utility model, the PCB assembly is used to sense changes in the magnetic field of the angle magnet and output a pedal angle signal.

[0035] According to the embodiment of the utility model, the PCB assembly is arranged directly above the angle magnet assembly. When the brake pedal is stepped on, the pedal arm drives the rotating shaft to rotate, and the angle magnet rotates together. The PCB board can sense the change of the magnetic field of the angle magnet and output the pedal angle signal.

[0036] According to an embodiment of the utility model, the housing comprises an upper housing and a lower housing;

[0037] The upper shell and the lower shell are connected by self-tapping screws;

[0038] The PCB assembly is installed in the housing by means of two self-tapping screws.

[0039] According to an embodiment of the utility model, the rotating shaft is provided with a notch for accommodating the angle magnet assembly.

[0040] According to an embodiment of the utility model, the pedal displacement sensor is installed on the pedal base by means of self-tapping screws three.

[0041] According to an embodiment of the utility model, the pedal displacement sensor outputs the push rod displacement signal by sensing the change of the magnetic field caused by the magnet.

[0042] According to the embodiment of the utility model, when the brake pedal is stepped on, the pedal arm push rod ball head push rod and piston move axially, and the magnet moves axially forward together. The linear displacement sensor can sense the change of the magnetic field of the magnet and output a push rod displacement signal.

[0043] According to an embodiment of the present utility model, a braking system is also provided, which uses the above-mentioned integrated electronic brake pedal mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0045] Figure 1 It is a structural schematic diagram of the integrated electronic brake pedal mechanism of the utility model;

[0046] Figure 2 It is a structural schematic diagram of a pedal simulator assembly of an integrated electronic brake pedal mechanism of the utility model;

[0047] Figure 3 It is an exploded view of the pedal simulator assembly of the integrated electronic brake pedal mechanism of the utility model;

[0048] Figure 4 It is an exploded view of the integrated electronic brake pedal mechanism angle sensor of the utility model;

[0049] Figure 5 It is a position diagram of the displacement sensor of the integrated electronic brake pedal mechanism of the utility model;

[0050] Figure 6 It is a schematic diagram of a pedal feel curve of an integrated electronic brake pedal mechanism of the utility model. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0052] The first embodiment of the utility model relates to an integrated electronic brake pedal mechanism, such as Figure 1 As shown, it includes a pedal base 102 , a pedal arm 101 , a pedal simulator assembly 103 , a pedal displacement sensor 105 and a pedal angle sensor 104 .

[0053] The utility model is mainly used in EMB brake system. The mechanism is equipped with 2 pedal displacement signals, 1 for pedal angle signal and 1 for push rod displacement signal. The 2 signals can be mutually verified to achieve safety redundancy backup and meet higher functional safety requirements. At the same time, the mechanism is equipped with a pedal simulator to provide the driver with a good pedal feel.

[0054] According to the embodiment of the present invention, the pedal arm 101 is hinged to the pedal base 102 via the rotating shaft 408 .

[0055] According to an embodiment of the present invention, the pedal arm 101 can rotate around the rotation axis 408 when pedaling.

[0056] According to the embodiments of the present utility model, Figure 2 and Figure 3 As shown, the pedal simulator assembly 103 is disposed inside the pedal base 102 to provide a pedal feel for the driver, wherein the pedal simulator assembly 103 is connected to the pedal arm 101 via a ball-end push rod 301 .

[0057] According to an embodiment of the present utility model, the pedal simulator assembly 103 is installed in the installation cavity of the pedal base 102, and the pedal simulator assembly 103 includes:

[0058] A ball-end push rod 301, one end of which is connected to the pedal arm 101, and the other end of which is disposed inside the pedal simulator assembly 103, wherein the diameter of the end of the ball-end push rod 301 close to the pedal arm 101 is larger than the diameter of the other end;

[0059] A push rod support, disposed in the pedal simulator assembly 103, for connecting the ball-end push rod 301 and the piston 306, and transmitting motion from the ball-end push rod 301 to the piston 306;

[0060] The piston 306 includes a fixed connecting section and an extending section. The piston 306 is fixedly connected to the push rod support through the connecting section. The piston 306 is slidably connected in the installation cavity.

[0061] A spring assembly, sleeved on the piston 306, includes a small spring 307 for providing an initial curve of the pedal feel and a large spring 312 for providing an initial curve of the pedal feel;

[0062] The rubber spring 313 is interference-mounted on the side wall of the mounting cavity away from the ball head push rod 301 and is used to limit the piston 306 .

[0063] According to an embodiment of the utility model, the spring assembly further includes:

[0064] The spring seat 310 is installed in the installation cavity and is axially limited by the shaft retaining ring 309. The spring seat 310 is sleeved outside the extension section of the piston 306 and contacts the connecting section of the piston 306.

[0065] A small spring 307 is sleeved on the piston 306, one end of the small spring 307 is connected to the piston 306, and the other end is connected to the spring seat 310 through a rubber pad 308;

[0066] One end of the large spring 312 is connected to the spring seat 310 through the friction ring 311, and the other end is fixedly connected to the inner wall of the installation cavity.

[0067] According to the embodiments of the present utility model, Figure 6 As shown, when the pedal is stepped on, the pedal arm 101 pushes the ball push rod 301, and the ball push rod 301, the push rod support, and the piston 306 move forward together, compressing the small spring 307. When the piston 306 contacts the spring seat 310, the small spring 307 is no longer compressed. This process is the initial curve of the pedal feel. If the pedal is continued to be stepped on, the large spring 312 is further compressed until the piston 306 contacts the rubber spring 313. This process is the second curve of the pedal feel. If the pedal is continued to be stepped on, the large spring 312 is further compressed and the rubber spring 313 is also compressed. This process is the third curve of the pedal feel. The initial curve has a small stiffness, the second curve has a moderate stiffness, and the third curve has a large stiffness, which provides sufficient support for the driver. The three-stage pedal feel curve provides the driver with a good pedal feel.

[0068] According to the embodiment of the utility model, the push rod support includes a hole retaining ring 304 , and a magnet 305 is connected between the hole retaining ring 304 and the piston 306 .

[0069] According to the embodiments of the present utility model, Figure 4 As shown, the pedal angle sensor 104 is installed inside the pedal base 102 and is coaxially arranged with the rotating shaft 408 to provide a push rod displacement signal for the EMB brake system.

[0070] According to an embodiment of the present utility model, the pedal angle sensor 104 includes:

[0071] Angle magnet assembly 407 is coaxially connected to the rotating shaft 408 via a fastening screw 406;

[0072] The PCB assembly 403 is arranged opposite to the angle magnet assembly 407, and is used to sense the change of the magnetic field of the angle magnet and output a pedal angle signal;

[0073] The housing is installed outside the PCB assembly 403 and is used to protect the PCB assembly 403 .

[0074] According to an embodiment of the present utility model, the housing includes an upper housing 402 and a lower housing 405;

[0075] The upper shell 402 and the lower shell 405 are connected by self-tapping screws 401;

[0076] The PCB assembly 403 is installed in the housing by self-tapping screws 404 .

[0077] According to an embodiment of the present invention, the rotating shaft 408 is provided with a notch for accommodating the angle magnet assembly 407 .

[0078] According to an embodiment of the utility model, the PCB assembly 403 is arranged directly above the angle magnet assembly. When the brake pedal is stepped on, the pedal arm 101 drives the rotating shaft 408 to rotate, and the angle magnet assembly 407 rotates together. The PCB assembly 403 can sense the change in the magnetic field of the angle magnet and output a pedal angle signal.

[0079] According to the embodiments of the present utility model, Figure 5 As shown, the pedal displacement sensor 105 is installed on the pedal base 102 to provide a pedal displacement signal for the EMB braking system.

[0080] According to the embodiment of the present utility model, the pedal displacement sensor 105 is installed on the pedal base 102 by means of a self-tapping screw 502 .

[0081] According to the embodiment of the present invention, the pedal displacement sensor 105 outputs a push rod displacement signal by sensing the change in the magnetic field caused by the magnet 305 .

[0082] According to the embodiment of the utility model, when the brake pedal is stepped on, the pedal arm 101 push rod ball head push rod 301 and piston 306 move axially, and the magnet 305 moves axially forward together. The pedal linear displacement sensor 105 can sense the change of the magnetic field of the magnet 305 and output a push rod displacement signal.

[0083] According to an embodiment of the utility model, the pedal displacement signal and the push rod displacement signal are mutually verified.

[0084] According to the embodiment of the utility model, when the pedal is stepped on, the pedal arm 101 drives the rotating shaft 408 to rotate, and the angle magnet assembly 407 rotates together. The PCB assembly 403 can sense the change of the magnetic field of the angle magnet and output a pedal angle signal.

[0085] At the same time, the pedal arm 101 pushes the ball push rod 301, and the ball push rod 301, the push rod support, and the piston 306 move forward together, compressing the small spring 307. When the piston 306 contacts the spring seat 310, the small spring 307 is no longer compressed. This process is the initial curve of the pedal feel. Continue to press the pedal downward, and the large spring 312 is further compressed until the piston 306 contacts the rubber spring 313. This process is the second curve of the pedal feel. Continue to press the pedal downward, and the large spring 312 is further compressed while the rubber spring 313 is also compressed.

[0086] During this process, the pedal line displacement sensor 105 can sense the magnetic field change of the magnet 305 and output a push rod displacement signal. The pedal displacement signal and the push rod displacement signal are mutually verified.

[0087] The second embodiment of the present invention relates to a brake system, using the above-mentioned integrated electronic brake pedal mechanism. It can be understood by those skilled in the art that the above-mentioned embodiments are specific examples of the present invention, and in actual application, various changes can be made to them in form and details without departing from the spirit and scope of the present invention.

Claims

1. An integrated electronic brake pedal mechanism, characterized in that: include: Pedal base (102); A pedal arm (101) is hinged to the pedal base (102) via a rotating shaft (408); A pedal simulator assembly (103) is arranged inside the pedal base (102) and is used to provide a pedal feel for the driver, wherein the pedal simulator assembly (103) is connected to the pedal arm (101) via a ball-end push rod (301); A pedal displacement sensor (105) is mounted on the pedal base (102); and The pedal angle sensor (104) is installed inside the pedal base (102) and is coaxially arranged with the rotating shaft (408).

2. The integrated electronic brake pedal mechanism according to claim 1, characterized in that: The pedal simulator assembly (103) is installed in the installation cavity of the pedal base (102), and the pedal simulator assembly (103) comprises: A ball-end push rod (301), one end of which is connected to the pedal arm (101) and the other end of which is arranged inside the pedal simulator assembly (103), wherein the diameter of one end of the ball-end push rod (301) close to the pedal arm (101) is larger than the diameter of the other end; A push rod support, disposed in the pedal simulator assembly (103), for connecting the ball-end push rod (301) and the piston (306), and transmitting motion from the ball-end push rod (301) to the piston (306); The piston (306) comprises a fixed connecting section and an extending section, the piston (306) is fixedly connected to the push rod support via the connecting section, and the piston (306) is slidably connected in the mounting cavity; A spring assembly sleeved on the piston (306); A rubber spring (313) is interference-mounted on a side wall of the mounting cavity away from the ball head push rod (301) and is used to limit the position of the piston (306).

3. The integrated electronic brake pedal mechanism according to claim 2, characterized in that: The spring assembly also includes: A spring seat (310) is installed in the installation cavity and axially limited by a shaft retaining ring (309). The spring seat (310) is sleeved outside the extension section of the piston (306) and contacts the connection section of the piston (306). A small spring (307) is sleeved on the piston (306), one end of the small spring (307) is connected to the piston (306), and the other end is connected to the spring seat (310) through a rubber pad (308); A large spring (312) has one end connected to the spring seat (310) via a friction ring (311), and the other end fixedly connected to the inner wall of the installation cavity.

4. The integrated electronic brake pedal mechanism according to claim 2, characterized in that: The push rod support comprises a hole retaining ring (304), and a magnet (305) is connected between the hole retaining ring (304) and the piston (306).

5. The integrated electronic brake pedal mechanism according to claim 1, characterized in that: The pedal angle sensor (104) comprises: An angle magnet assembly (407) is coaxially connected to the rotating shaft (408) via a fastening screw (406); A PCB assembly (403) is arranged opposite to the angle magnet assembly (407); A housing is installed outside the PCB assembly (403) and is used to protect the PCB assembly (403).

6. The integrated electronic brake pedal mechanism according to claim 5, characterized in that: The housing comprises an upper housing (402) and a lower housing (405); The upper shell (402) and the lower shell (405) are connected by self-tapping screws (401); The PCB assembly (403) is installed in the housing by means of self-tapping screws (404).

7. The integrated electronic brake pedal mechanism according to claim 5, characterized in that: The rotating shaft (408) is provided with a notch for accommodating the angle magnet assembly (407).

8. The integrated electronic brake pedal mechanism according to claim 1, characterized in that: The pedal displacement sensor (105) is mounted on the pedal base (102) via a third self-tapping screw (502).

9. A braking system, characterized in that: An integrated electronic brake pedal mechanism as described in any one of claims 1 to 8 is used.

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