Hydraulic brake pedal suitable for short front overhang passenger car

Abstract

A hydraulic brake pedal suitable for a short front overhang passenger car comprises a brake pedal assembly, a vacuum booster with a brake master cylinder assembly and a supporting system playing a role in supporting and fixing, the vacuum booster with the brake master cylinder assembly is laterally installed on the brake pedal assembly by arranging a set of connecting rod system, and the front-back installation distance is greatly saved. The lateral arrangement of the vacuum booster with the brake master cylinder on the brake pedal is realized through a set of connecting rod mechanism, the front and back arrangement space is saved, and more abundant footstep space is provided for a driver; an original brake pedal lever ratio is changed by changing the size of the connecting rod, and a large brake pedal lever ratio can be achieved through a short brake pedal arm.

Description

Technical Field

[0001] This utility model relates to the field of brake pedal technology, and in particular to a hydraulic brake pedal suitable for buses with short front overhang. Background Technology

[0002] A short front overhang bus refers to a bus design with a shorter front overhang (the distance from the center of the wheel to the front of the vehicle). This design optimizes the interior layout and handling performance by shortening the engine compartment or front space, and is commonly found in city buses and tour buses. Short front overhang buses free up front space, allowing for wider aisles or more seats, improving passenger capacity. However, this also requires a re-evaluation of structural layout, functional integration, and safety performance, simplifying mechanical structures, reducing component size, and improving headroom utilization. The hydraulic brake pedal is a core control component in a car's braking system. Through hydraulic transmission, it amplifies the driver's pedal force and transmits it to the brake calipers or brake drums, enabling the vehicle to decelerate or stop.

[0003] Existing hydraulic brake pedal structures, such as Figure 1 The traditional vacuum booster with master cylinder is located behind the brake pedal, requiring a relatively long installation distance of approximately 420mm, which compresses the driver's foot space. This invention uses a linkage mechanism to arrange the vacuum booster with master cylinder laterally to the brake pedal, saving front and rear installation space. The front and rear installation distance for the vacuum booster with master cylinder assembly is only about 280mm, saving significant space. Furthermore, this invention alters the original brake pedal lever ratio by changing the linkage dimensions, reducing the brake pedal arm length and achieving a larger brake pedal lever ratio with a shorter brake pedal arm. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic brake pedal suitable for buses with short front overhangs, so as to solve the technical problems existing in the prior art.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0006] A hydraulic brake pedal suitable for buses with short front overhang includes a brake pedal assembly, a vacuum booster assembly with brake master cylinder, and a support system for supporting and fixing. By setting a linkage system, the vacuum booster assembly with brake master cylinder is mounted laterally on the brake pedal assembly, which greatly saves the front and rear installation distance.

[0007] Preferably, the linkage system includes a rotating rod, a ball joint, a master pump drive shaft, and a connecting rod.

[0008] Preferably, the connecting rod includes a first connecting rod fixedly installed at one end of the rotating rod, and a second and a third connecting rod fixedly installed at both ends of the main pump drive shaft.

[0009] Preferably, one end of the rotating rod is fixedly connected to the pedal arm, and the other end is connected to the ball joint lever via a first connecting rod; the ball joint lever is movably connected to the rotating rod via the first connecting rod, and the other end is movably connected to the master pump drive shaft via a second connecting rod; the master pump drive shaft is movably connected to the ball joint lever via a second connecting rod, and the other end is movably connected to the fork and vacuum booster push rod via a third connecting rod.

[0010] Preferably, the brake pedal assembly includes a brake pedal, a pedal arm, and a return spring.

[0011] Preferably, the support system includes a brake pedal base and a vacuum booster mounting base, wherein the vacuum booster mounting base is mounted on the side of the brake pedal base.

[0012] Preferably, the vacuum booster assembly with brake master cylinder includes a vacuum booster and a brake master cylinder, wherein the vacuum booster is fixedly mounted on a vacuum booster mounting base, and the brake master cylinder is fixedly mounted on the upper part of the vacuum booster.

[0013] Preferably, the rotating rod is fitted with a first inner support tube with bushings at both ends, and the main pump drive shaft is fitted with a second inner support tube with bushings at both ends.

[0014] Preferably, a brake pedal is fixedly installed at one end of the pedal arm, and the end of the pedal arm away from the brake pedal is fixedly connected to the rotating rod; a return spring is installed on the pedal arm so that the pedal arm returns to its original position when the pedal is released.

[0015] This utility model has the following advantages:

[0016] This invention uses a linkage mechanism to arrange the vacuum booster with the master cylinder on the side of the brake pedal, saving front and rear space and providing more foot space for the driver; by changing the linkage size to change the original brake pedal lever ratio, a larger brake pedal lever ratio can be achieved with a shorter brake pedal arm. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the existing technology structure;

[0018] Figure 2 This is a front view of the overall structure of this utility model;

[0019] Figure 3 This is a top view of the overall structure of this utility model;

[0020] Figure 4 This is a partial structural front view of the present invention;

[0021] Figure 5 This is a partial top view of the structure of this utility model;

[0022] Figure 6 This is a sectional view of the AA position of this utility model;

[0023] Figure 7 This is a cross-sectional view showing the positions of BB and CC in this utility model.

[0024] The markings in the diagram are as follows: 1. Brake pedal base; 2. Return spring; 3. Pedal arm; 4. Brake pedal; 5. Ball joint rod; 6. Master cylinder drive shaft; 7. Brake switch bracket; 8. First inner support tube; 9. Bushing; 10. Second inner support tube; 11. Vacuum booster; 12. Push rod; 13. Brake master cylinder; 14. Vacuum booster mounting base; 15. Push rod hole; 16. Mounting hole; 17. Rotary rod; 18. First connecting rod; 19. Second connecting rod; 20. Third connecting rod; 21. Fork; 22. Brake switch. Detailed Implementation

[0025] To better understand the purpose, structure, and function of this utility model, the following detailed description of a hydraulic brake pedal suitable for short front overhang buses is provided in conjunction with the accompanying drawings.

[0026] like Figure 2-7 As shown, this utility model provides a hydraulic brake pedal suitable for short front overhang buses, including a brake pedal 4. The brake pedal 4 is fixedly installed at one end of a pedal arm 3. The end of the pedal arm 3 away from the brake pedal 4 is fixedly connected to a rotating rod 17. The rotating rod 17 is movably connected to the brake pedal base 1 by bolts at both ends. A first inner support tube 8 is fitted inside the rotating rod 17, and bushings 9 are fitted at both ends. When the brake pedal 4 is pressed, the pedal arm 3 will drive the rotating rod 17 to rotate. A return spring 2 is installed on the pedal arm 3, which returns the pedal arm 3 to its original position when the pedal is released.

[0027] One end of the rotating rod 17 is fixedly connected to the pedal arm 3, and the other end is fixedly connected to the first connecting rod 18. When the rotating rod 17 rotates, the first connecting rod 18 also rotates. The first connecting rod 18 is movably connected to the upper end of the ball joint rod 5, and the lower end of the ball joint rod 5 is movably connected to the second connecting rod 19. The second connecting rod 19 is fixedly installed at one end of the master cylinder drive shaft 6, and the other end is fixedly installed with the third connecting rod 20. The master cylinder drive shaft 6 has a second inner support tube 10 installed inside, and bushings 9 are fitted at both ends. One end of the master cylinder drive shaft 6 is movably installed on the brake pedal base 1 by bolts, and the other end is movably installed on the vacuum booster mounting seat 14 by bolts. The vacuum booster mounting seat 14 is fixedly connected to one side of the brake pedal base 1. The third connecting rod 20 is movably connected to the fork 21, and the upper end of the fork 21 is connected to the push rod 12 of the vacuum booster 11.

[0028] The vacuum booster mounting base 14 is fixedly connected to one side of the brake pedal base 1. It has push rod holes 15 and mounting holes 16. The vacuum booster 11 is fixedly mounted on it through the four mounting holes 16. The push rod 12 of the vacuum booster 11 passes through the push rod holes 15 and connects downward to the upper end of the fork 21. The upper end of the vacuum booster 11 is equipped with a brake master cylinder 13. The vacuum booster mounting base 14 is also equipped with a brake switch bracket 7, and a brake switch 22 is installed on the brake switch bracket 7.

[0029] When in use, when the brake pedal 4 is pressed, the pedal arm 3 drives the rotating rod 17 to rotate. The first connecting rod 18, which is fixedly connected to the rotating rod 17, drives the ball joint rod 5 to move upward. The ball joint rod 5 is driven to rotate by the second connecting rod 19, which is fixed on the master cylinder drive shaft 6. The rotation of the master cylinder drive shaft 6 drives the third connecting rod 20, which is fixed on it, to move upward. This pushes the fork 21 and the vacuum booster 11 push rod 12 to move upward. The vacuum booster 11 also assists in driving the brake master cylinder 13 to output high-pressure hydraulic oil. The high-pressure hydraulic oil passes through the brake oil pipe and the ABS (or ESC) module to the brake slave cylinder. The brake slave cylinder drives the brake to work, realizing vehicle braking.

[0030] The beneficial effects of this utility model are:

[0031] This invention uses a linkage mechanism to arrange the vacuum booster with the master cylinder on the side of the brake pedal, saving front and rear space and providing more foot space for the driver; by changing the linkage size to change the original brake pedal lever ratio, a larger brake pedal lever ratio can be achieved with a shorter brake pedal arm.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A hydraulic brake pedal assembly for use in a short front overhang passenger vehicle, comprising a brake pedal assembly, a vacuum booster with brake master cylinder assembly, and a support system for providing support and fixation, characterized in that, The support system includes a brake pedal base (1) and a vacuum booster mounting base (14). The vacuum booster mounting base (14) is fixedly installed on one side of the brake pedal base (1). The brake pedal assembly and the vacuum booster with brake master cylinder assembly are connected by a linkage system consisting of a rotating rod (17), a ball joint rod (5), a master cylinder drive shaft (6), and a connecting rod. This allows the vacuum booster with brake master cylinder assembly to be installed on the side of the brake pedal assembly, greatly saving the front and rear installation distance.

2. A hydraulic brake pedal for a short front overhang vehicle as claimed in claim 1, wherein, The connecting rod includes a first connecting rod (18) fixedly installed at one end of the rotating rod (17), and a second connecting rod (19) and a third connecting rod (20) fixedly installed at both ends of the main pump drive shaft (6).

3. A hydraulic brake pedal for a short front overhang vehicle as claimed in claim 2, wherein, One end of the rotating rod (17) is fixedly connected to the pedal arm (3), and the other end is movably connected to the ball joint rod (5) through the first connecting rod (18); the ball joint rod (5) is movably connected to the rotating rod (17) through the first connecting rod (18), and the other end is movably connected to the master pump drive shaft (6) through the second connecting rod (19); the master pump drive shaft (6) is movably connected to the ball joint rod (5) through the second connecting rod (19), and the other end is movably connected to the fork (21) and the vacuum booster (11) push rod (12) through the third connecting rod (20).

4. A hydraulic brake pedal for a short front overhang vehicle as claimed in claim 3, wherein, The brake pedal (4) assembly includes a brake pedal (4), a pedal arm (3), and a return spring (2).

5. A hydraulic brake pedal for a short front overhang vehicle as claimed in claim 4, wherein, One end of the pedal arm (3) is fixedly mounted with a brake pedal (4), and the end of the pedal arm (3) away from the brake pedal (4) is fixedly connected to the rotating rod (17); a return spring (2) is installed on the pedal arm (3) so that the pedal arm (3) returns to its original position when the pedal is released.

6. A hydraulic brake pedal for use on a short front overhang vehicle as defined in claim 1, wherein The vacuum booster assembly with brake master cylinder includes a vacuum booster (11) and a brake master cylinder (13). The vacuum booster (11) is fixedly installed on the vacuum booster mounting base (14), and the brake master cylinder (13) is fixedly installed on the upper part of the vacuum booster (11).

7. A hydraulic brake pedal for a short front overhang vehicle as defined in claim 2, wherein The rotating rod (17) is fitted with a first inner support tube (8), and bushings (9) are fitted at both ends. The main pump drive shaft (6) is fitted with a second inner support tube (10), and bushings (9) are also fitted at both ends.

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