Position-adjustable brake pedal structure and working method thereof

Abstract

The invention discloses a position-adjustable brake pedal structure and a working method thereof. The position-adjustable brake pedal structure comprises a brake pedal arm, a supporting frame and a booster ball head. The bottom end of the brake pedal arm is rotationally connected to the supporting frame, and the quick connection support is assembled in the brake pedal arm and assembled with the booster ball head. A pedal limiting mechanism is attached to the supporting frame, an electric cylinder is further installed on the supporting frame, the electric cylinder is connected with the bottom end of the brake pedal arm through the pedal limiting mechanism, and the electric cylinder can pull the brake pedal arm to the pedal full-stroke position through the pedal limiting mechanism. A set of pedal position adjustable structure is added on the basis of a conventional brake pedal, the folding and unfolding functions of the pedal are achieved, and a driver is prevented from stepping and touching by mistake in the automatic driving process.

Description

Technical Field

[0001] The invention relates to the technical field of automobile vacuum booster brake systems, and in particular to a brake pedal structure with adjustable position and a working method thereof. Background Art

[0002] In the hydraulic braking system of traditional automobiles, the brake pedal usually adopts an all-metal structure. This structural pedal is suitable for conventional fuel vehicles and some new energy vehicles, so this type of pedal can only be used as an execution structure; and the bracket adopts a latch structure to cooperate with the booster, which affects the assembly efficiency during the vehicle assembly process. As the automatic driving function is gradually implemented and promoted, higher functional requirements are put forward for the pedal. Therefore, a retractable brake pedal structure is required.

[0003] The inventor discovered during research that currently in cars with autonomous driving functions, the brake pedals are all fixedly installed. When the autonomous driving mode is turned on, the brake pedals cannot be retracted. Due to limited space on the pedals, the driver is very likely to touch or accidentally step on them, which increases potential risks to driving.

[0004] In the prior art related to adjustable brake pedals, for example, patent application No. 201120258725.2 discloses a brake pedal with adjustable pedal surface position, specifically disclosing that the pedal arm is divided into pedal arm I and pedal arm II in the length direction, pedal arm II is rotatably connected to the pedal bracket, the pedal surface is arranged on pedal arm I, pedal arm I and pedal arm II are fastened together by bolts, and multiple connection holes are arranged on pedal arm I and pedal arm II along their length direction, and the bolts pass through the connection holes. The original brake pedal position cannot be moved, and the requirements of drivers of various body shapes for the pedal position are not met. For example, patent application No. 201710224716.3 discloses a brake pedal position adjustment device, specifically disclosing a mounting bracket, a brake pedal, a pedal displacement sensor, a pedal feel simulator and a pedal position adjustment device, which solves the problem that the prior art cannot meet the personalized requirements of drivers for different brake pedal positions, and the driver can adjust the pedal position according to his own situation. Although the above-mentioned prior art can adjust the pedal position, it is unable to truly retract the pedal. When the car is in automatic driving mode, the driver still has the risk of accidentally touching or stepping on the pedal, which brings safety hazards to driving. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a brake pedal structure with adjustable position and a working method thereof. A set of pedal position adjustable structure is added to the conventional brake pedal to realize the pedal retraction and extension function, thereby preventing the driver from accidentally stepping on or bumping the pedal during automatic driving.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] In a first aspect, the present application provides a brake pedal structure with adjustable position, comprising: a brake pedal arm, a support frame and a booster ball head;

[0008] The bottom end of the brake pedal arm is rotatably connected to the support frame, and a quick-connect bracket is assembled inside the brake pedal arm, and the quick-connect bracket is assembled with the booster ball head;

[0009] The support frame is provided with a pedal limiting mechanism, and the support frame is also equipped with an electric cylinder, which is connected to the bottom end of the brake pedal arm through the pedal limiting mechanism. The electric cylinder can pull the brake pedal arm to the full pedal stroke position through the pedal limiting mechanism.

[0010] As a further technical solution, the main body of the brake pedal arm is a U-shaped structure, a pedal sheet is provided on the brake pedal arm, and the pedal sheet and the U-shaped brake pedal arm are welded into an integrated structure.

[0011] As a further technical solution, the main body of the support frame is stamped, and a pedal travel sensor is also installed on the support frame to collect pedal travel signals and transmit signals of driving functions.

[0012] As a further technical solution, a pedal shaft is fixedly mounted on the support frame, and the bottom end of the brake pedal arm is rotatably connected to the support frame via the pedal shaft.

[0013] As a further technical solution, a rotating shaft and a retaining spring are installed on the side of the pedal shaft close to the electric cylinder. One end of the pedal limiting mechanism is installed on the rotating shaft and fastened by the retaining spring, thereby realizing the connection between the pedal limiting mechanism and the brake pedal arm; the other end of the pedal limiting mechanism is fixedly connected to the electric cylinder.

[0014] As a further technical solution, the pedal limiting mechanism is a fan-shaped structure.

[0015] As a further technical solution, two one-way limit blocks are symmetrically arranged inside the quick-connect bracket, and the one-way limit blocks rotatably and movably mount the booster ball head in the quick-connect bracket.

[0016] As a further technical solution, a limited position master cylinder is also installed on the support frame and assembled on the support frame by two bolts.

[0017] As a further technical solution, a push rod is connected to the position-limiting master cylinder, and the booster ball head is installed on the push rod through a threaded structure.

[0018] In the second aspect, the present application provides a working method of a position-adjustable brake pedal structure, based on a position-adjustable brake pedal structure as described in any one of the first aspects, including: a pedal stroke sensor collects pedal stroke signals and transmits driving function signals, and pulls the brake pedal to the full pedal stroke position after the vehicle enters the automatic driving mode. Specifically: a push rod is connected to the limit master cylinder, and the booster ball head is installed on the push rod through a threaded structure. The push rod pushes the piston in the limit master cylinder to move, and the piston in the limit master cylinder returns to its original position through a return spring arranged inside the limit master cylinder.

[0019] One or more technical solutions of the present invention have the following beneficial effects:

[0020] (1) The present invention adopts the above technical solution, which has a simple structure and well solves the technical problem in the prior art that the brake pedal position cannot be adjusted and cannot be retracted.

[0021] (2) The present invention adopts the above technical solution, so that when the car is in the process of automatic driving, the brake pedal can be retracted to prevent the driver from accidentally stepping on or touching the brake pedal, thereby avoiding safety accidents caused by the driver accidentally stepping on or touching the brake pedal during the automatic driving process, and reducing the accident rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 is a schematic diagram of a brake pedal structure of the present invention;

[0024] Figure 2 It is a back view of the brake pedal structure of the present invention.

[0025] Among them: 1. Brake pedal arm; 2. Pedal travel sensor; 3. Support frame; 4. Pedal limit mechanism; 5. Electric cylinder; 6. Limit master cylinder; 7. Rotary shaft; 8. Circlip;

[0026] 1.1. Pedal arm body 1.2. Quick-connect bracket 1.2.1 One-way limit block 2.1 Sensor mounting bolt;

[0027] 6.1. Booster ball head 6.2. Bolts. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] Embodiment 1

[0030] like Figure 1-2 As shown, the present invention provides a brake pedal structure with adjustable position, comprising: a brake pedal arm 1, a support frame 3 and a booster ball head 6.1; the main body of the brake pedal arm 1 is set as a U-shaped structure, the bottom end of the brake pedal arm 1 is rotatably connected to the support frame 3, a pedal sheet is set on the brake pedal arm 1, the pedal sheet and the brake pedal arm of the U-shaped structure are welded into an integrated structure, the brake pedal arm is internally assembled with a quick-connect bracket, and the quick-connect bracket is assembled with the booster ball head;

[0031] A pedal limiting mechanism 4 is attached to the support frame 3, and the support frame 3 is also equipped with an electric cylinder 5, which is connected to the bottom end of the brake pedal arm through the pedal limiting mechanism. When the vehicle enters the automatic driving mode, the electric cylinder can pull the brake pedal arm to the full stroke position (upper limit position) of the pedal through the pedal limiting mechanism, thereby achieving the effect of retracting the brake pedal, preventing the driver from accidentally stepping on or touching the brake pedal during the automatic driving process, avoiding safety accidents caused by the driver accidentally stepping on or touching the brake pedal during the automatic driving process, and reducing the accident rate.

[0032] In this embodiment, the main body of the support frame 3 is a stamping structure, and a pedal travel sensor 2 is also installed on the support frame 3, which is fixedly installed on the support frame 3 by a sensor mounting bolt 2.1, and is used to collect pedal travel signals and transmit signals of driving functions. A pedal shaft is also fixedly installed on the support frame 3, and the bottom end of the brake pedal arm is rotatably connected to the support frame through the pedal shaft. A rotary shaft 7 and a retaining spring 8 are installed on the side of the pedal shaft close to the electric cylinder. One end of the pedal limit mechanism is installed on the rotary shaft and fastened by the retaining spring, so as to realize the connection between the pedal limit mechanism and the brake pedal arm; the other end of the pedal limit mechanism is fixedly connected to the electric cylinder. In this embodiment, the pedal limit mechanism is a fan-shaped structure.

[0033] In this embodiment, two one-way limit blocks 1.2.1 are symmetrically arranged inside the quick-connect bracket 1.2, and the one-way limit blocks rotatably mount the booster ball head inside the quick-connect bracket; a limit master cylinder is also mounted on the support frame, and is specifically assembled on the support frame by two bolts 6.2. A push rod is connected to the limit master cylinder, and the booster ball head is mounted on the push rod through a threaded structure. The push rod pushes the piston in the limit master cylinder to move, and the return of the piston in the limit master cylinder mainly relies on the return spring arranged inside the limit master cylinder to push the piston back to the original position.

[0034] The working process of the brake pedal structure provided in this embodiment is as follows: a stamped and welded brake pedal arm, the pedal arm main body is a U-shaped structure, the pedal plate and the U-shaped pedal arm are welded into one, and a quick-connect bracket is assembled inside the U-shaped pedal arm for assembling the booster ball head; a stamped and welded bracket, the bracket main body is stamped, and a sensor is installed on the bracket to collect pedal travel signals and transmit driving function signals; the bracket is equipped with an electric cylinder to pull the brake pedal to the full pedal travel position after the vehicle enters the automatic driving mode; the bracket is equipped with a fan-shaped structure, one section is connected to the pedal arm and the other section is connected to the electric cylinder; the fan-shaped structure is assembled on the pedal shaft and fixed by a retaining spring.

[0035] Embodiment 2

[0036] The present embodiment provides a working method of a position-adjustable brake pedal structure, based on a position-adjustable brake pedal structure provided in Embodiment 1, including: a pedal stroke sensor collects pedal stroke signals and transmits signals of driving functions, and pulls the brake pedal to the full pedal stroke position after the vehicle enters the automatic driving mode. Specifically: a push rod is connected to the limit master cylinder, and the booster ball head is installed on the push rod through a threaded structure. The push rod pushes the piston in the limit master cylinder to move, and the return of the piston in the limit master cylinder is pushed back to its original position by a return spring arranged inside the limit master cylinder.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A brake pedal structure with adjustable position, characterized in that: include: brake pedal arms, support brackets and booster ball joints; The bottom end of the brake pedal arm is rotatably connected to the support frame, and a quick-connect bracket is assembled inside the brake pedal arm, and the quick-connect bracket is assembled with the booster ball head; The support frame is provided with a pedal limiting mechanism, and the support frame is also equipped with an electric cylinder, which is connected to the bottom end of the brake pedal arm through the pedal limiting mechanism. The electric cylinder can pull the brake pedal arm to the full pedal stroke position through the pedal limiting mechanism.

2. A position-adjustable brake pedal structure according to claim 1, characterized in that: The main body of the brake pedal arm is a U-shaped structure, a pedal sheet is arranged on the brake pedal arm, and the pedal sheet and the U-shaped brake pedal arm are welded into an integrated structure.

3. A position-adjustable brake pedal structure according to claim 1, characterized in that: The main body of the support frame is formed by stamping, and a pedal travel sensor is also installed on the support frame to collect pedal travel signals and transmit signals of driving functions.

4. A position-adjustable brake pedal structure according to claim 1, characterized in that: The support frame is also fixedly mounted with a pedal shaft, and the bottom end of the brake pedal arm is rotatably connected to the support frame via the pedal shaft.

5. A brake pedal structure with adjustable position as claimed in claim 4, characterized in that: A rotating shaft and a retaining spring are installed on the side of the pedal shaft close to the electric cylinder. One end of the pedal limiting mechanism is installed on the rotating shaft and fastened by the retaining spring, thereby realizing the connection between the pedal limiting mechanism and the brake pedal arm; the other end of the pedal limiting mechanism is fixedly connected to the electric cylinder.

6. A position-adjustable brake pedal structure as claimed in claim 5, characterized in that: The pedal limiting mechanism is a fan-shaped structure.

7. The position-adjustable brake pedal structure according to claim 1, characterized in that: Two one-way limiting blocks are symmetrically arranged inside the quick-connect bracket, and the one-way limiting blocks rotatably and movably mount the booster ball head in the quick-connect bracket.

8. The position-adjustable brake pedal structure according to claim 1, characterized in that: A limited position master cylinder is also installed on the support frame and is assembled on the support frame by two bolts.

9. A position-adjustable brake pedal structure as claimed in claim 8, characterized in that: The position-limiting master cylinder is connected with a push rod, and the booster ball head is installed on the push rod through a threaded structure.

10. A working method of a position-adjustable brake pedal structure, based on the position-adjustable brake pedal structure according to any one of claims 1 to 9, characterized in that: include: The pedal travel sensor collects pedal travel signals and transmits driving function signals. After the vehicle enters the automatic driving mode, the brake pedal is pulled to the full pedal travel position. Specifically: a push rod is connected to the limit master cylinder, and the booster ball head is installed on the push rod through a threaded structure. The push rod pushes the piston in the limit master cylinder to move, and the piston in the limit master cylinder returns to its original position through a return spring arranged inside the limit master cylinder.

Images