Brake pedal structure

Abstract

The application discloses a brake pedal structure, the lower end of the pedal arm is pivotally assembled to the front end of the support; the limiting master cylinder is fixed to the rear part of the support; the movable rod of the limiting master cylinder is assembled and connected to the lower part or the middle part of the pedal arm; in the natural state, the supporting force of the movable rod of the limiting master cylinder makes the pedal arm and the pedal sheet be located at the initial position; the electric cylinder is fixed to the rear part of the support and located at the left side or the right side of the limiting master cylinder; the top rod of the electric cylinder is connected to the lower part or the middle part of the pedal arm; when the vehicle enters the automatic driving mode, the controller controls the electric cylinder to retract the top rod so that the pedal arm is rotated backward and retracted to the full stroke position of the pedal; when the vehicle exits the automatic driving mode, the controller controls the electric cylinder to release the top rod, and the supporting force of the movable rod of the limiting master cylinder makes the pedal arm and the pedal sheet rotate forward and return to the initial position. The brake pedal structure can guarantee the operation feeling of the driver during normal driving and improve the automatic driving comfort of the driver and the automatic driving safety during automatic driving.

Description

Technical Field

[0001] The invention relates to automobile parts, in particular to a brake pedal structure. Background Art

[0002] With the rapid development of the automobile industry and the improvement of people's living standards, cars have become one of the indispensable means of transportation for people to travel, transport goods, etc.

[0003] The brake pedal, as the name suggests, is a pedal that limits power, often referred to as the foot brake (service brake). It's used to slow down and stop the car. It's one of the five main controls in a car and is used very frequently. The driver's control directly impacts driving safety.

[0004] Currently, the brake pedal assembly typically consists of a pedal arm and a booster push rod. Pushing the booster push rod generates braking force. The booster push rod is movably connected to the middle of the pedal arm, with each end of the pedal arm connected to a lever arm and the pedal. When the pedal is depressed, a lever structure is formed, generating a strong thrust on the booster push rod, allowing the driver to easily apply the brakes.

[0005] In traditional automotive hydraulic braking systems, the brake pedal typically utilizes an all-metal structure. This structure is suitable for conventional fuel vehicles and some new energy vehicles, so it serves only as an actuator. Furthermore, the bracket uses a latch structure to connect to the booster, which affects assembly efficiency during vehicle assembly. The increasing implementation of autonomous driving features is placing higher functional requirements on the pedal.

[0006] Chinese patent CN201921877550.6 discloses a brake pedal assembly, such as Figure 1 As shown, it includes a pedal arm 1 and a booster push rod 2 that are rotatably connected to each other. One end of the pedal arm 1 is movably connected to a lever arm 3 to form a lever structure. The booster push rod 2 is provided with a shift fork 21, which is rotatably connected to the pedal arm 1 via a latch 12. The pedal arm 1 is provided with a connecting hole corresponding to the shift fork 21, and a rubber bushing 11 is provided in the connecting hole. The latch 12 passes through the shift fork 21 and the rubber bushing 11. The shift fork 21 is provided with a sliding ring 22 facing the rubber bushing 11. The rubber bushing 11 is provided with an annular groove 112 corresponding to the sliding ring 22, and the sliding ring 22 is located in the annular groove 112.

[0007] The brake pedal assembly disclosed in Chinese patent CN201921877550.6 has a pedal arm 1 and a booster push rod 2 connected by a pin 12, and they are in rigid contact with each other. When using the brake pedal assembly, if the oil pressure of the booster or clutch pump is unstable, related fluctuations will occur. The fluctuations will be directly transmitted to the pin shaft through the fork, and further transmitted to the driver's feet. At this time, the driver's feet will vibrate to a certain extent, affecting the user experience. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a brake pedal structure that can not only ensure the driver's operating feel during normal driving, but also improve the driver's automatic driving comfort and safety during automatic driving.

[0009] In order to solve the above technical problems, the present invention provides a brake pedal structure, which includes a pedal arm 41, a pedal plate 42, a bracket 5, a limit master cylinder 6, an electric cylinder 7 and a controller;

[0010] The pedal sheet 42 is fixed to the front side of the upper end of the pedal arm 41;

[0011] The lower end of the pedal arm 41 is pivotally assembled to the front end of the bracket 5;

[0012] The position-limiting master cylinder 6 is fixed to the rear of the bracket 5;

[0013] The movable rod 61 of the position-limiting master cylinder 6 is assembled and connected to the lower part or the middle part of the pedal arm 41;

[0014] In the natural state, the support force of the movable rod 61 of the position-limiting master cylinder 6 causes the pedal arm 41 and the pedal plate 42 to be located at the initial position;

[0015] The electric cylinder 7 is fixed to the rear of the bracket 5 and is located on the A side of the position-limiting master cylinder 6, where A is left or right;

[0016] The top rod 71 of the electric cylinder 7 is connected to the lower part or the middle part of the pedal arm 41;

[0017] When the vehicle enters the automatic driving mode, the controller controls the electric cylinder 7 to retract its push rod 71, so that the pedal arm 41 drives the pedal plate 42 to rotate backward and retract to the full stroke position of the pedal; when the vehicle exits the automatic driving mode, the controller controls the electric cylinder 7 to release its push rod 71. In a natural state, the supporting force of the movable rod 61 of the limit master cylinder 6 causes the pedal arm 41 and the pedal plate 42 to rotate forward and return to the initial position.

[0018] Preferably, the pedal arm 41 is a U-shaped groove structure with an opening facing rearward;

[0019] The rear back of the upper portion of the pedal sheet 42 is fixed to the front side of the upper U-shaped groove bottom plate of the pedal arm 41;

[0020] A quick-connect bracket 43 is mounted inside the U-shaped groove at the lower or middle portion of the pedal arm 41;

[0021] The lower end of the pedal arm 41 is pivotally assembled to the front end of the bracket 5 through the U-shaped groove side plate.

[0022] Preferably, the movable rod 61 of the position-limiting master cylinder 6 is assembled and connected to the quick-connect bracket 43 via a ball head 62 .

[0023] Preferably, two one-way limit blocks 431 are symmetrically provided in the quick-connect bracket 43;

[0024] The one-way limiting block 431 rotatably limits the ball head 62 in the quick-connect bracket 43 .

[0025] Preferably, the brake pedal structure further includes a fan-shaped connecting plate 73;

[0026] The fan-shaped connecting plate 73 has an arc-shaped groove 731 formed at its distal end and its proximal end fixedly assembled to the A end of the pedal shaft 81;

[0027] The pedal shaft 81 is fixed to the front end of the bracket 5 in the left-right direction;

[0028] The lower end of the pedal arm 41 is pivotally connected to the pedal shaft 81 .

[0029] Preferably, a connecting rod 411 is formed in the middle of the pedal arm 41;

[0030] The connecting rod 411 penetrates into the arc groove 731 of the fan-shaped connecting plate 73;

[0031] The head of the push rod 71 of the electric cylinder 7 is connected to the middle of the fan-shaped connecting plate 73 through a linkage shaft 72 .

[0032] Preferably, the proximal end of the fan-shaped connecting plate 73 is fixedly assembled on the pedal shaft 81 via a retaining spring 82 .

[0033] Preferably, the brake pedal structure further includes an angle sensor 9;

[0034] The angle sensor 9 is mounted and fixed on the front of the bracket 5 and is located on the B side of the pedal arm 41, where A is left and B is right, or A is right and B is left;

[0035] The angle sensor 9 is used to detect the pedal stroke.

[0036] Preferably, the pedal arm 41 and the pedal plate 42 are welded into one body;

[0037] The main body of the bracket 5 is formed by stamping;

[0038] The position-limiting master cylinder 6 is assembled and fixed to the rear of the bracket 5 by means of two bolts 63 .

[0039] The brake pedal structure of the present invention has a pedal arm 41 and a pedal plate 42 that automatically retract to the full pedal stroke position in the automatic driving mode, thereby increasing the space for the driver's feet to move. This can not only ensure the driver's operating feel during normal driving, but also enhance the driver's automatic driving comfort and safety during automatic driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 It is a structural schematic diagram of an existing brake pedal assembly;

[0042] Figure 2 yes Figure 1 A partial enlarged view of area A in the middle;

[0043] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional mechanism of the middle shift fork, rubber bushing and latch;

[0044] Figure 4 is a front perspective schematic diagram of an embodiment of a brake pedal structure of the present invention;

[0045] Figure 5 It is a rear perspective schematic diagram of an embodiment of a brake pedal structure of the present invention.

[0046] Description of reference numerals in the figures:

[0047] 1 Pedal arm; 2 Booster push rod; 3 Lever arm; 21 Booster push rod fork; 12 Latch; 11 Rubber bushing; 22 Sliding ring; Annular groove 112; 41 Pedal arm; 411 Connecting rod; 42 Pedal plate; 43 Quick-connect bracket; 431 One-way limit block; 5 Bracket; 6 Limit master cylinder; 61 Limit master cylinder movable rod; 62 Ball head; 63 Bolt; 7 Electric cylinder; 71 Electric cylinder push rod; 72 Linkage shaft; 73 Fan-shaped connecting plate; 731 Arc groove; 81 Pedal shaft; 82 Circlip; 9 Angle sensor. DETAILED DESCRIPTION

[0048] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0049] Example 1

[0050] like Figure 4 、 Figure 5 As shown, the brake pedal structure includes a pedal arm 41, a pedal plate 42, a bracket 5, a limit master cylinder 6, an electric cylinder 7 and a controller;

[0051] The pedal sheet 42 is fixed to the front side of the upper end of the pedal arm 41;

[0052] The lower end of the pedal arm 41 is pivotally assembled to the front end of the bracket 5;

[0053] The position-limiting master cylinder 6 is fixed to the rear of the bracket 5;

[0054] The movable rod 61 of the position-limiting master cylinder 6 is assembled and connected to the lower part or the middle part of the pedal arm 41;

[0055] In the natural state, the support force of the movable rod 61 of the position-limiting master cylinder 6 causes the pedal arm 41 and the pedal plate 42 to be located at the initial position;

[0056] The electric cylinder 7 is fixed to the rear of the bracket 5 and is located on the A side of the position-limiting master cylinder 6, where A is left or right;

[0057] The top rod 71 of the electric cylinder 7 is connected to the lower part or the middle part of the pedal arm 41;

[0058] When the vehicle enters the automatic driving mode, the controller controls the electric cylinder 7 to retract its push rod 71, so that the pedal arm 41 drives the pedal plate 42 to rotate backward and retract to the full stroke position of the pedal; when the vehicle exits the automatic driving mode, the controller controls the electric cylinder 7 to release its push rod 71. In a natural state, the supporting force of the movable rod 61 of the limit master cylinder 6 causes the pedal arm 41 and the pedal plate 42 to rotate forward and return to the initial position.

[0059] In the brake pedal structure of embodiment 1, the pedal arm 41 and the pedal plate 42 automatically retract to the full pedal stroke position in the automatic driving mode, thereby increasing the space for the driver's feet to move. This can not only ensure the driver's operating feel during normal driving, but also enhance the driver's automatic driving comfort and safety during automatic driving.

[0060] Example 2

[0061] Based on the brake pedal structure of the first embodiment, the pedal arm 41 is a U-shaped groove structure with an opening facing rearward;

[0062] The rear back of the upper portion of the pedal sheet 42 is fixed to the front side of the upper U-shaped groove bottom plate of the pedal arm 41;

[0063] A quick-connect bracket 43 is mounted inside the U-shaped groove at the lower or middle portion of the pedal arm 41;

[0064] The lower end of the pedal arm 41 is pivotally assembled to the front end of the bracket 5 through the U-shaped groove side plate.

[0065] Preferably, the movable rod 61 of the position-limiting master cylinder 6 is assembled and connected to the quick-connect bracket 43 via a ball head 62 .

[0066] Preferably, two one-way limit blocks 431 are symmetrically provided in the quick-connect bracket 43;

[0067] The one-way limiting block 431 rotatably limits the ball head 62 in the quick-connect bracket 43 .

[0068] Example 3

[0069] Based on the second embodiment, the brake pedal structure further includes a fan-shaped connecting plate 73;

[0070] The fan-shaped connecting plate 73 has an arc-shaped groove 731 formed at its distal end and its proximal end fixedly assembled to the A end of the pedal shaft 81;

[0071] The pedal shaft 81 is fixed to the front end of the bracket 5 in the left-right direction;

[0072] The lower end of the pedal arm 41 is pivotally connected to the pedal shaft 81 .

[0073] Preferably, a connecting rod 411 is formed in the middle of the pedal arm 41;

[0074] The connecting rod 411 penetrates into the arc groove 731 of the fan-shaped connecting plate 73;

[0075] The head of the push rod 71 of the electric cylinder 7 is connected to the middle of the fan-shaped connecting plate 73 through a linkage shaft 72 .

[0076] Preferably, the near-center end of the fan-shaped connecting plate 73 is fixedly assembled on the pedal shaft 81 through a retaining spring 82 to ensure force transmission.

[0077] In the brake pedal structure of Example 3, when the vehicle enters autonomous driving mode, the electric cylinder 7 retracts its push rod 71. The head of the push rod 71 drives the fan-shaped connecting plate 73 to rotate backward via a linkage shaft 72. The fan-shaped connecting plate 73 drives the pedal arm 41 to rotate backward via the linkage rod 411, thereby retracting the pedal arm 41 and the pedal plate 42 to the full pedal travel position. When the vehicle exits autonomous driving mode, in a natural state, the electric cylinder 7 releases its push rod 71. The head of the rod 71 drives the fan-shaped connecting plate 73 to rotate forward via a linkage shaft 72, allowing the linkage rod 411 to move forward within the arcuate groove 731 of the fan-shaped connecting plate 73, thereby allowing the pedal arm 41 to return to its initial position under the support force of the movable rod 61 of the position-limiting master cylinder 6.

[0078] Example 4

[0079] Based on the first embodiment, the brake pedal structure further includes an angle sensor 9;

[0080] The angle sensor 9 is mounted and fixed on the front of the bracket 5 and is located on the B side of the pedal arm 41, where A is left and B is right, or A is right and B is left;

[0081] The angle sensor 9 is used to detect the pedal stroke.

[0082] Preferably, the pedal arm 41 and the pedal plate 42 are welded into one body.

[0083] Preferably, the main body of the bracket 5 is formed by stamping.

[0084] Preferably, the position-limiting master cylinder 6 is assembled and fixed to the rear of the bracket 5 by two bolts 63 .

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A brake pedal structure, characterized in that: It includes a pedal arm (41), a pedal sheet (42), a bracket (5), a position-limiting master cylinder (6), an electric cylinder (7) and a controller; The pedal sheet (42) is fixed to the front side of the upper end of the pedal arm (41); The lower end of the pedal arm (41) is pivotally mounted to the front end of the bracket (5); The position-limiting master cylinder (6) is fixed to the rear of the bracket (5); The movable rod (61) of the position-limiting master cylinder (6) is assembled and connected to the lower part or the middle part of the pedal arm (41); In a natural state, the supporting force of the movable rod (61) of the position-limiting master cylinder (6) causes the pedal arm (41) and the pedal plate (42) to be located at an initial position; The electric cylinder (7) is fixed to the rear of the bracket (5) and is located on the A side of the position-limiting master cylinder (6), where A is left or right; The top rod (71) of the electric cylinder (7) is connected to the lower part or the middle part of the pedal arm (41); The controller controls the electric cylinder (7) to retract its push rod (71) when the vehicle enters the automatic driving mode, so that the pedal arm (41) drives the pedal plate (42) to rotate backward and retract to the pedal full stroke position; when the vehicle exits the automatic driving mode, the controller controls the electric cylinder (7) to release its push rod (71), and in a natural state, the supporting force of the movable rod (61) of the limit master cylinder (6) causes the pedal arm (41) and the pedal plate (42) to rotate forward and return to the initial position; The brake pedal structure further includes a fan-shaped connecting plate (73); The fan-shaped connecting plate (73) has an arc-shaped groove (731) formed at its distal end and its proximal end fixedly assembled on the A end of the pedal shaft (81); The pedal shaft (81) is fixed to the front end of the bracket (5) in the left-right direction; The lower end of the pedal arm (41) is pivotally connected to the pedal shaft (81); A connecting rod (411) is formed in the middle of the pedal arm (41); The connecting rod (411) penetrates into the arc-shaped groove (731) of the fan-shaped connecting plate (73); The head of the push rod (71) of the electric cylinder (7) is connected to the middle of the fan-shaped connecting plate (73) through a linkage shaft (72).

2. The brake pedal structure according to claim 1, characterized in that: The pedal arm (41) is a U-shaped groove structure with an opening facing rearward; The rear back surface of the upper portion of the pedal sheet (42) is fixedly attached to the front side surface of the upper U-shaped groove bottom plate of the pedal arm (41); A quick-connect bracket (43) is installed inside the U-shaped groove at the lower or middle part of the pedal arm (41); The lower end of the pedal arm (41) is pivotally assembled to the front end of the bracket (5) through the U-shaped groove side plate.

3. The brake pedal structure according to claim 2, characterized in that: The movable rod (61) of the position-limiting master cylinder (6) is assembled and connected to the quick-connect bracket (43) via a ball head (62).

4. The brake pedal structure according to claim 2, characterized in that: Two one-way limiting blocks (431) are symmetrically arranged in the quick-connect bracket (43); The one-way limiting block (431) rotatably limits the ball head (62) within the quick-connect bracket (43).

5. The brake pedal structure according to claim 1, characterized in that: The near-center end of the fan-shaped connecting plate (73) is fixedly assembled on the pedal shaft (81) through a clamping spring (82).

6. The brake pedal structure according to claim 1, characterized in that: The brake pedal structure further includes an angle sensor (9); The angle sensor (9) is mounted and fixed on the front of the bracket (5) and is located on the B side of the pedal arm (41), where A is left and B is right, or A is right and B is left; The angle sensor (9) is used to detect pedal stroke.

7. The brake pedal structure according to claim 1, wherein: The pedal arm (41) and the pedal plate (42) are welded into one body; The main body of the bracket (5) is formed by stamping; The position-limiting master cylinder (6) is assembled and fixed to the rear of the bracket (5) by means of two bolts (63).

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