Integrated wire-controlled brake pedal

Abstract

The present invention discloses an integrated wire-controlled brake pedal, belonging to the technical field of automobile parts. It comprises a pedal housing, and angle sensors and pressure sensor connectors are respectively fixedly installed on the left and right sides of the pedal housing by screws, the angle sensor is connected by a rotating shaft, and a pedal body is also sleeved and installed on the rotating shaft, one end of the pedal body extending outside the pedal housing is fixedly connected to the pedal through a force sensing kit, and a spring device is installed at the bottom of the pedal housing, one end of the spring device is connected to one side inside the pedal housing, and the other end of the spring device is connected to the pedal body. The present invention has a simple structure, does not occupy the space in the engine compartment, and is easy to install. It can be adapted to different types of vehicles equipped with electronic mechanical brakes. Redundant signal output is achieved through sensor structure design, and angle sensors and force sensors are equipped to physically achieve redundant signal output, so that the braking function achieves redundant backup from the physical structure.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, in particular to an integrated wire-controlled brake pedal. Background Art

[0002] With the increase in the number of vehicles, traffic accidents are frequent, and the performance requirements for the braking system are getting higher and higher. Although the traditional hydraulic braking system has been studied and developed for a long time, it has limitations in further improving the performance of the braking system. Therefore, major automobile manufacturers have begun to explore new brake actuators, and the integrated wire-controlled brake pedal is one of the solutions. In this system, the driver's pedal force does not act directly on the master cylinder, but the pedal feel is achieved through the simulator, and the brake is applied in conjunction with the EMB. This design enables the integrated wire-controlled brake pedal to provide a pedal feel similar to that of the traditional braking system while being able to more accurately control the braking force, thereby improving braking performance and safety.

[0003] At the same time, with the advent of the era of automobile electrification and intelligence, the braking safety performance of automobiles has received more and more attention. When an actuator fails in the braking system, redundant backup is needed to take over it, and the function must continue to be executed in a short time.

[0004] In summary, a device is needed to simultaneously transmit the brake feel and brake signal and realize a redundant backup function. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated wire-controlled brake pedal. On the one hand, a brake pedal force simulation module is integrated with a brake pedal module, the structure is simple, there is no need to install a brake pedal mechanism separately, there is no need to open a hole in the engine compartment firewall, no engine compartment space is occupied, and the installation is convenient; on the one hand, brake pedal force feedback is achieved through a multi-stage coil spring, and a variety of pedal feelings can be achieved by replacing springs with different stiffnesses, overcoming the shortcomings of a fixed structure and a single pedal feel of a traditional mechanical pedal, and can be adapted to different types of vehicles equipped with electronic mechanical brakes; on the one hand, it is maintenance-free for life, and there is no need to add brake fluid, and the engine compartment does not need to consider adding brake fluid and reducing installation space; on the other hand, signal redundant output is achieved through sensor structure design, and angle sensors and force sensors are equipped to physically achieve signal redundant output, so that the braking function is redundantly backed up from a physical structure.

[0006] To achieve the above-mentioned objectives, the present invention provides an integrated wire-controlled brake pedal, including a pedal housing, wherein angle sensors and pressure sensor connectors are respectively fixedly installed on the left and right sides of the pedal housing by screws, one end of the angle sensor is connected by a rotating shaft, and a pedal body is also mounted on the rotating shaft, one end of the pedal body extending outside the pedal housing is fixedly connected to the pedal through a force sensing kit, a spring device is installed at the bottom of the pedal housing, one end of the spring device is connected to one side inside the pedal housing, and the other end of the spring device is connected to the pedal body.

[0007] Preferably, the force sensing kit includes a force sensor, which is located at the connection between the pedal body and the pedal, and a contact plate and a pressure plate are provided on the upper surface of the force sensor, the contact plate passes through the center of the pedal, and a blocking cap is provided on the pedal.

[0008] Preferably, the contact plate is a convex cone structure, and the blocking cap is a snap-on structure.

[0009] Preferably, the spring device comprises a primary spring seat, a secondary spring seat and a tertiary spring seat, the port of the primary spring seat is sleeved on the port of the tertiary spring seat, a guide pin is installed at the center of the tertiary spring seat, the outer surface of the guide pin is sleeved with a tertiary spring, the tertiary spring is connected to a spring retaining ring arranged at the outer end of the guide pin, a primary spring is embedded in the primary spring seat, the primary spring is arranged around the outer side of the secondary spring seat and the tertiary spring, a secondary spring is embedded in the secondary spring seat, and the primary spring and the secondary spring are coaxially installed. The guide pin is fixed by interference fit of the tertiary spring seat.

[0010] Preferably, the primary spring seat is connected to one side inside the pedal housing via a pin.

[0011] Preferably, the three-stage spring seat is connected to the pedal body via a pin.

[0012] Preferably, plastic bearings are installed at the top openings of the first-stage spring seat and the third-stage spring seat, and are interference-fitted with the openings. The installation method and installation dimensions of the multi-stage coil spring remain unchanged and can be replaced to achieve simulation of different pedal feelings.

[0013] Preferably, the primary spring and the secondary spring are the front brake module, and the secondary spring and the tertiary spring are the rear brake module. Braking function redundancy is achieved through structural redundancy, which is achieved by the cooperation of two force sensors and angle sensors with independent power supplies and independent signals. The sensor contains two independent power supplies and two independent signals to achieve structural redundancy of functions.

[0014] Preferably, one end of the pin shaft passing through the pedal housing is sleeved with a retaining spring.

[0015] Preferably, a bushing is installed at the connection between the angle sensor and the rotating shaft.

[0016] Therefore, the present invention adopts an integrated wire-controlled brake pedal with the above structure, which has the following beneficial effects:

[0017] (1) The present invention does not require opening a hole in the engine compartment firewall and does not occupy the engine compartment space; it is directly installed in the cockpit and does not require a separate brake pedal mechanism to be installed. The structure is simple and easy to install. The front section of the simulator is composed of a primary spring, and the rear section is composed of a secondary spring and a tertiary spring. They can be replaced without changing other structures, and can simulate different pedal feelings to match different vehicles.

[0018] (2) In the present invention, one end of the rotating shaft is connected to the angle sensor, and the rotation angle of the rotating shaft is transmitted to the angle sensor through the rectangular structure design at its end, and the braking signal redundancy is achieved by structural redundancy. The sensor has dual independent power supplies and independent signals; it is equipped with a pedal angle sensor and a pedal force sensor.

[0019] (3) The present invention does not require the addition of brake fluid, and thus does not have the risk of brake fluid leakage. It is safe and environmentally friendly, and there is no need to consider issues such as brake fluid addition and subsequent maintenance during installation.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an integrated wire-controlled brake pedal of the present invention;

[0022] Figure 2 A cross-sectional schematic diagram of an integrated wire-controlled brake pedal of the present invention;

[0023] Figure 3 It is a cross-sectional schematic diagram of a rotating shaft of an integrated wire-controlled brake pedal of the present invention;

[0024] Figure 4 It is a schematic cross-sectional view of a pin shaft of an integrated wire-controlled brake pedal of the present invention;

[0025] Reference numerals

[0026] 1. Pedal housing, 2. Angle sensor, 3. Pressure sensor connector, 4. Pedal body, 5. Pedal, 6. Pin, 7. Primary spring seat, 8. Primary spring, 9. Secondary spring, 10. Secondary spring seat, 11. Spring retaining ring, 12. Third-stage spring, 13. Guide pin, 14. Third-stage spring seat, 15. Force sensor, 16. Contact plate, 17. Pressure plate, 18. Plug cap, 19. Wiring harness, 20. Rotating shaft, 21. Screw, 22. Bushing, 23. Bearing, 24. Circlip. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] Example

[0030] like Figure 1-3 As shown, the present invention provides an integrated brake-by-wire pedal, comprising a pedal housing 1, on the left and right sides of the pedal housing 1 are respectively fixedly mounted with an angle sensor 2 and a pressure sensor connector 3 by screws 21, one end of the angle sensor 2 is connected by a rotating shaft 20, and a pedal body 4 is also sleeved and mounted on the rotating shaft 20, one end of the pedal body 4 extending outside the pedal housing 1 is fixedly connected to a pedal 5 by a force sensing kit, a spring device is installed at the bottom of the pedal housing 1, one end of the spring device is connected to one side inside the pedal housing 1, and the other end of the spring device is connected to the pedal body 4.

[0031] The force sensing kit includes a force sensor 15, which is located at the connection between the pedal body 4 and the pedal 5, and a contact plate 16 and a pressure plate 17 are provided on the upper surface of the force sensor 15. The contact plate 16 passes through the center of the pedal 5, and a plug cap 18 is provided on the pedal 5 for sealing.

[0032] The contact plate 16 is a convex cone structure, and the plugging cap 18 is a buckle-shaped structure.

[0033] The spring device includes a primary spring seat 7, a secondary spring seat 10 and a tertiary spring seat 14. The port of the primary spring seat 7 is sleeved on the port of the tertiary spring seat 14. A guide pin 13 is installed at the center of the tertiary spring seat 14. The outer surface of the guide pin 13 is sleeved with a tertiary spring 12. The tertiary spring 12 is connected to a spring retaining ring 11 arranged at the outer end of the guide pin 13. A primary spring 8 is embedded in the primary spring seat 7. The primary spring 8 is arranged around the outer side of the secondary spring seat 10 and the tertiary spring 12. A secondary spring 9 is embedded in the secondary spring seat 10. The primary spring 8 and the secondary spring 9 are coaxially installed. The guide pin 13 is fixed by the interference fit of the tertiary spring seat 14.

[0034] The primary spring seat 7 is connected to one side inside the pedal housing 1 through a pin 6 .

[0035] The three-stage spring seat 14 is connected to the pedal body 4 through the pin 6 .

[0036] The first-stage spring seat 7 and the third-stage spring seat 14 are provided with bearings 23 at the top openings, which are interference fit with the openings. The multi-stage coil spring installation method and installation dimensions remain unchanged and can be replaced to achieve simulation of different pedal feelings.

[0037] The first-stage spring 8 and the second-stage spring 9 are the front-end braking modules, and the second-stage spring 9 and the third-stage spring 12 are the rear-end braking modules. The redundancy of the braking function is achieved through structural redundancy, which is achieved by the cooperation of two force sensors and angle sensors with independent power supplies and independent signals. The sensor contains two independent power supplies and two independent signals to achieve structural redundancy of functions.

[0038] One end of the pin shaft 6 that passes through the pedal housing 1 is sleeved with a retaining spring 24 .

[0039] A bushing 22 is installed at the connection between the angle sensor 2 and the rotating shaft 20 .

[0040] The present invention includes three-stage spring force feedback, namely, a primary spring 8, a secondary spring 9 and a tertiary spring 12. The three parts are installed in series. When the pedal 5 is subjected to force, the rotating shaft 20 rotates to push the tertiary spring seat 14 to move toward the primary spring seat 7, first compressing the primary spring 8. As the displacement of the tertiary spring seat 14 increases, the secondary spring seat 10 contacts the primary spring seat 7, and the primary spring 8 ends its work, and then enters the compression stroke of the secondary spring 9. As the displacement of the tertiary spring seat 14 further increases, until the secondary spring seat 10 contacts the spring retaining ring 11, the tertiary spring 12 begins to be compressed. The reaction force generated by the spring acts on the pedal 5, thereby generating a pedal force. The primary spring 8, the secondary spring 9 and the tertiary spring 12 can be replaced and matched independently to simulate different pedal feelings. The force sensor 15 and the angle sensor 2 cooperate to realize the redundant function, and the sensor has two independent power supplies and two signals that back up each other to ensure the redundant output of the brake signal.

[0041] like Figure 2 As shown, the guide pin 13 is fixed by the three-stage spring seat 14 through interference fit.

[0042] like Figure 2 As shown, the first-stage spring seat 7 and the third-stage spring seat 14 are coaxially installed, and the clearance between the inner and outer walls cooperates to provide a guiding function.

[0043] like Figure 2 As shown, the blocking cap 18 is provided with a buckle and is installed on the pedal 5 by interference fit.

[0044] like Figure 2 As shown, the wire harness 19 of the force sensor 15 is led out along the wire harness groove provided in the pedal body 4 through the opening of the pedal housing and connected to the pedal force sensor connector 3 .

[0045] like Figure 2 As shown, the force sensor 15 is installed in the opening of the pedal body 4, the bottom of the contact plate 16 is installed in contact with the force surface of the force sensor 15 and is fixed to the pedal body 4 through the pressure plate 17, and the pedal 5 is installed on the contact plate 16 through the threaded structure of the contact plate head and fixed by a nut.

[0046] like Figure 3 As shown, one end of the rotating shaft 20 is inserted into the angle sensor 2 .

[0047] like Figure 3 As shown, the angle sensor 2 and the pressure sensor connector 3 are mounted on the corresponding mounting holes on the pedal body by means of screws 21.

[0048] like Figure 3 As shown, the bushing 22 is pressed into the pedal housing with interference fit, and the rotating shaft 20 is installed in the pedal body and rotated with the bushing.

[0049] like Figure 4As shown, the bearing 23 is press-fitted into the through hole provided at the top of the spring seat 7.

[0050] like Figure 4 As shown, the primary spring seat 7 is connected and installed with the pedal housing via a pin 6 and fixed by a retaining spring 24 .

[0051] Therefore, the present invention adopts the above-mentioned integrated wire-controlled brake pedal, integrates the brake pedal force simulation module with the brake pedal module, has a simple structure, does not need to install the brake pedal mechanism separately, does not need to open a hole in the engine compartment firewall, does not occupy the engine compartment space, and is easy to install. Brake pedal force feedback is achieved through a multi-stage coil spring. By replacing springs with different stiffnesses, a variety of pedal feelings can be achieved, overcoming the shortcomings of the traditional mechanical pedal structure being fixed and the pedal feeling being single, and can be adapted to different types of vehicles equipped with electronic mechanical brakes. It is also maintenance-free for life, does not require the addition of brake fluid, and the engine compartment does not need to consider the addition of brake fluid and the reduction of installation space; signal redundant output is achieved through sensor structure design, and angle sensors and force sensors are equipped to physically achieve signal redundant output, so that the braking function is redundantly backed up from a physical structure.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. An integrated brake-by-wire pedal, characterized in that: It comprises a pedal housing, and angle sensors and pressure sensor connectors are respectively fixedly installed on the left and right sides of the pedal housing by screws, one end of the angle sensor is connected by a rotating shaft, and a pedal body is also sleeved and installed on the rotating shaft, one end of the pedal body extending outside the pedal housing is fixedly connected to the pedal through a force sensing kit, a spring device is installed at the bottom of the pedal housing, one end of the spring device is connected to one side of the inside of the pedal housing, and the other end of the spring device is connected to the pedal body; The force sensing kit includes a force sensor, the force sensor is located at the connection between the pedal body and the pedal, and a contact plate and a pressure plate are provided on the upper surface of the force sensor, the contact plate passes through the center of the pedal, and a blocking cap is provided on the pedal; The spring device includes a primary spring seat, a secondary spring seat and a tertiary spring seat. The port of the primary spring seat is sleeved on the port of the tertiary spring seat. A guide pin is installed at the center of the inside of the tertiary spring seat. The outer surface of the guide pin is sleeved with a tertiary spring. The tertiary spring is connected to a spring retaining ring arranged at the outer end of the guide pin. A primary spring is embedded in the first spring seat. The primary spring is arranged around the outer sides of the secondary spring seat and the tertiary spring. A secondary spring is embedded in the secondary spring seat.

2. The integrated brake-by-wire pedal according to claim 1, characterized in that: The contact plate is a convex cone structure, and the plugging cap is a buckle-shaped structure.

3. The integrated brake-by-wire pedal according to claim 1, characterized in that: The primary spring seat is connected to one side inside the pedal housing through a pin.

4. The integrated brake-by-wire pedal according to claim 1, characterized in that: The three-stage spring seat is connected to the pedal body through a pin shaft.

5. The integrated brake-by-wire pedal according to claim 1, characterized in that: Bearings are installed at the top openings of the first-stage spring seat and the third-stage spring seat, and are interference-fitted with the openings.

6. The integrated brake-by-wire pedal according to claim 1, characterized in that: The primary spring and the secondary spring are a front-end braking module, and the secondary spring and the tertiary spring are a rear-end braking module.

7. The integrated brake-by-wire pedal according to claim 4, characterized in that: One end of the pin shaft passing through the pedal housing is sleeved with a retaining spring.

8. The integrated brake-by-wire pedal according to claim 1, characterized in that: A bushing is installed at the connection between the angle sensor and the rotating shaft.

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