CN213619709U

CN213619709U - Brake pedal

Info

Publication number: CN213619709U
Application number: CN202022461290.3U
Authority: CN
Inventors: 段兵; 桂宾
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-07-06
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to an automobile chassis braking operating system technical field, concretely relates to brake pedal. The structure comprises a rotating shaft bushing, a pedal arm and a pedal; the pedal arm is hollow, the pedal arm is connected with the rotating shaft bushing in a welding mode, the pedal arm is assembled on the pedal support body through the rotating shaft and the rotating shaft bushing, and the rotating shaft is fixed on the pedal support body in a riveting mode; the pedal arm is connected with the pedal in a welding way, and a supporting block is arranged at the included angle of the pedal arm and the pedal. The utility model discloses a brake pedal structure is light, and intensity is high.

Description

Brake pedal

Technical Field

The utility model relates to an automobile chassis braking operating system technical field, concretely relates to brake pedal.

Background

During the running process of the vehicle, the braking is related to the running safety of a driver. The driver steps on the brake pedal to make the automobile to perform forced deceleration or stop according to the intention of the driver, and in the process, the driver directly operates the brake pedal by feet, and the vehicle is decelerated and stopped by the stepping depth and speed of the brake pedal by the feet of the driver.

The brake pedal is mainly fixed in a cab of a front wall plate through a mounting bolt of a booster, and four nuts are respectively assembled in the cab and fixed together with one bolt and the booster; traditional solid brake pedal arm (fig. 1) uses the steel sheet that the material is generally 8mm thick to form through the punching press, and this kind of solid pedal arm structure has following problem:

(1) the solid brake pedal arm is heavy, the weight of the solid pedal arm generally occupies about 50% of the total weight of the brake pedal assembly, and particularly when the brake pedal lever is small, the pedal arm is long, the weight is heavy, and the light weight of the whole vehicle is not facilitated;

(2) the transverse rigidity and the longitudinal rigidity of the solid brake pedal arm are poor, so that the overall rigidity of the pedal is influenced;

(3) the solid brake pedal arm is heavy in weight, and the elastic modulus of the brake pedal return spring is not easy to adjust;

(4) the flatness of the joint of the solid brake pedal arm and the shifting fork of the vacuum booster is poor;

(5) the edge edges and corners of the solid brake pedal arm are sharp and sharp, and the appearance is poor.

The solid brake pedal arm is heavier due to weight and poor in material utilization rate, under the same scheme, the solid brake pedal arm is about 30% -40% heavier than the hollow pedal arm, although the solid brake pedal arm is consistent with the installation positions of the vacuum booster and the front wall plate, the elastic modulus of the return spring of the brake pedal is not easy to adjust, and the risk of spring breakage is increased due to the fact that the weight of the pedal arm is heavier during a brake pedal endurance test.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is a series of problems that current brake pedal overweight brought.

The utility model provides a brake pedal, which comprises a rotating shaft bushing, a pedal arm and a pedal; the pedal arm is hollow; a rotating shaft bushing is welded at the front end of the pedal arm and assembled on the pedal bracket body through the rotating shaft bushing and the rotating shaft, and the rotating shaft is fixed on the pedal bracket body in a riveting mode; the rear end of the pedal arm is welded with a pedal, and a supporting block is arranged at the included angle of the pedal arm and the pedal.

The pivot adopts the riveting mode to fix on the footboard stake body, guarantees through this connected mode that the pedal arm can be in pivot free rotation.

Specifically, the front section of the pedal arm is punched with a welding rotating shaft bushing sleeve hole, and the diameter of the hole is matched with the outer diameter of the rotating shaft bushing.

Specifically, a safety distance of 10mm is reserved between the edge of the foremost end of the rotating shaft bushing hole and the edge of the foremost end of the pedal arm. During the pedal being stepped on, the moment received here is large, and sufficient rigidity is required, particularly in the pedal rigidity test. The distance is reserved so that the safety can be guaranteed under the condition that the rigidity of the edge of the hole is guaranteed; and the scheme can be adjusted by considering the subsequent design of different lever ratios.

Specifically, during assembly, a safety distance which is not less than 5mm is reserved between the pedal arm and the pedal mounting support body, and interference with the pedal support body in the braking process is avoided.

Preferably, the lower surface of the pedal is provided with a reinforcing rib.

Specifically, the middle section of the pedal arm is close to the front position and is provided with an inwards-concave booster shifting fork installation surface, and the concave surface is matched with the opening size of the booster shifting fork.

Specifically, the depth of the recess of the mounting surface of the booster shifting fork needs to meet the requirement that the booster shifting fork does not interfere or block with the recess during the full-stroke movement of the brake pedal.

Specifically, the pedal arm is of a single-layer structure, after stamping forming, two sides of the pedal arm are bent towards the middle, the folding position is closed in a welding mode, and the whole pedal arm folding position is completely welded.

Wherein, the pedal arm is made by stamping SPHC plates with the thickness of 2 mm.

Wherein, the rotating shaft bushing is made of a formed round steel pipe.

Wherein, the pedal and the supporting block are made of SPHC plates with the thickness of 3mm by stamping.

Specifically, the pedal arm gradually narrows from front to back. The whole rigidity of the pedal is ensured while the light weight design is facilitated.

Specifically, the width of the pedal arm in the Y-axis direction is 12-15 mm, and sufficient thickness can be guaranteed. If the width in the Y-axis direction is too small, the rigidity in the Y-axis and X-axis directions decreases.

Specifically, the pedal arm is in a straight state in the X-axis direction. If the bending is too large, the rigidity of the pedal arm is lowered. The straight state is as close to straight as possible, and a small-amplitude radian is allowed.

The utility model has the advantages that: the utility model discloses a footboard arm cross section is moderate, has abundant contact with the footboard and guarantees footboard arm and footboard welding strength. The footboard adopts stamping forming, and the lower surface increases the strengthening rib, guarantees that the rigidity of footboard is unlikely to warp in the use, passes through welded connection with the footboard arm. The supporting block is added when the joint of the pedal and the pedal arm is welded, so that the connection rigidity of the pedal and the pedal arm is enhanced, and the risk that the pedal falls off in the use and treading process due to the fact that the welding part of the pedal and the pedal arm is not centered in the design process is eliminated. The structure directly reduces the total weight of the brake pedal assembly, and is beneficial to the light weight structure of the whole vehicle; the hollow brake pedal arm has a simple structure, is easy to manufacture and assemble, and improves the transverse rigidity, the longitudinal rigidity and the overall strength of the pedal rigidity of the pedal arm and the attractiveness of the brake pedal arm; in addition, the problem that the pedal arm pin is difficult to assemble in the assembly field assembly process due to the fact that the flatness of the connecting surface of the brake pedal arm and the shifting fork of the booster is not good can be avoided, and the assembly efficiency of the assembly and the stability of products are improved.

Drawings

Fig. 1 is a schematic diagram of a background art structure.

Fig. 2 is a schematic view of the pedal arm assembly, wherein the coordinate system is a standard coordinate system commonly used in automobiles.

Fig. 3 is a schematic view of the pedal arm, and the thick black line indicated by the arrow in the figure indicates the welding position of the support block and the pedal arm.

Fig. 4 is a schematic view of the pedal, wherein the thick black line indicated by the arrow indicates the welding position of the pedal and the pedal arm, and the thick black line indicated by the arrow indicates the welding position of the support block and the pedal.

FIG. 5 is a schematic view of the support block.

Fig. 6 is a sectional view of the pedal arm at the connection with the spindle taken along line a-a in fig. 2.

FIG. 7 is a schematic view of the welding of the support block, wherein the thick black lines indicated by arrows indicate the welding positions of the support block with the pedal and the pedal arm.

FIG. 8 is a schematic view of the pedal arm and the support block being welded together, and the thick black line indicated by the arrow indicates the welded portion between the pedal and the pedal arm.

The labels in the figure are: 1-a rotating shaft bushing, 2-a pedal arm, 3-a pedal and 4-a supporting block; 21-rotating shaft bushing hole, 22-booster shifting fork mounting surface, 23-pin shaft hole, 24-pedal arm folding welding part, 31-reinforcing rib and 32-local gap.

Detailed Description

Embodiment the utility model discloses the assembly of structure

Referring to fig. 2, 3, 4, 5, the brake pedal includes a spindle bushing 1, a pedal arm 2, and a pedal 3; the pedal arm 2 is hollow; a rotating shaft bushing is welded at the front end of the pedal arm 2 and is assembled on the pedal bracket body through the rotating shaft bushing and the rotating shaft, and the rotating shaft is fixed on the pedal bracket body in a riveting mode; the rear end of the pedal arm 2 is welded with a pedal 3, and a supporting block 4 is arranged at the included angle of the pedal arm and the pedal. The pivot adopts the riveting mode to fix on the footboard stake body, guarantees through this connected mode that the pedal arm can be in pivot free rotation.

Specifically, a welding rotating shaft bushing sleeve hole 21 is punched at the front section of the pedal arm 2, and the diameter of the hole is matched with the outer diameter of the rotating shaft bushing 1.

Specifically, a safety distance of 10mm is reserved between the foremost edge of the rotation bush housing hole 21 and the foremost edge of the pedal arm 2. During the pedal being stepped on, the moment received here is large, and sufficient rigidity is required, particularly in the pedal rigidity test. The distance is reserved so that the safety can be guaranteed under the condition that the rigidity of the edge of the hole is guaranteed; and the scheme can be adjusted by considering the subsequent design of different lever ratios.

Specifically, during assembly, a safety distance not less than 5mm is reserved between the pedal arm 2 and the pedal mounting support body, and interference with the pedal support body in the braking process is avoided.

Preferably, the lower surface of the step panel 3 is provided with a reinforcing rib 31.

Specifically, the pedal arm 2 has an inwardly recessed booster shift fork mounting surface 22 at a position near the front of the middle section, and the recessed surface is matched with the opening size of the booster shift fork.

Specifically, the depth of the recess of the mounting surface 22 of the shift fork of the booster is required to meet the requirement that the shift fork of the booster does not interfere with or block the recess during the full-stroke movement of the brake pedal.

Specifically, the pedal arm 2 is of a single-layer structure, after punching and forming, two sides are bent towards the middle, the folding position is closed in a welding mode, and the whole pedal arm folding position is completely welded.

Wherein, the pedal arm 2 is made by stamping SPHC plates with the thickness of 2 mm.

Wherein, the rotating shaft bushing 1 is made of a formed round steel pipe.

Wherein, the pedal 3 and the supporting block 4 are made of SPHC plates with the thickness of 3mm by stamping.

Specifically, the pedal arm 2 is gradually narrowed from the front to the rear. The whole rigidity of the pedal is ensured while the light weight design is facilitated.

Specifically, the width of the pedal arm 2 in the Y-axis direction is 12-15 mm, and sufficient thickness can be ensured. If the width in the Y-axis direction is too small, the rigidity in the Y-axis and X-axis directions decreases.

Specifically, the pedal arm 2 is in a straight state in the X-axis direction. If the bending is too large, the rigidity of the pedal arm is lowered. The straight state is as close to straight as possible, and a small-amplitude radian is allowed.

The pedal arm 2 generally selects SPHC plates with the thickness of 2mm, after the plates are blanked, local sunken features 22 at the positions of pin shafts are arranged through a shifting fork of a stamping booster and the brake pedal arm, a pin shaft hole 23 for connecting the pedal 3 and the booster is stamped at one time, a rotating shaft hole 21 of the brake pedal is stamped, then the whole pedal arm 2 is stamped in a bent shape and folded, and welding parts 24 at the folded parts of the pedal arm are welded.

Brake pedal pivot bush 1 chooses fashioned round steel tubular product for use, according to required size unloading to the intraductal cleaning of geminate transistors, the circularity and the axiality of external diameter and internal diameter of brake pedal pivot bush have been guaranteed to fashioned tubular product.

The pedal 3 is made of SPHC plates with the thickness of 3mm, blanking is conducted on the plates, the reinforcing ribs 31 and 33 on the lower surface of the pedal are punched, the welding parts of the pedal arm 2 and the pedal 3 are punched, and finally the rigidity of the pedal is guaranteed not to deform in use through the reinforced structure through the blanking forming local notch feature 32.

The supporting block 4 material, thickness generally are unanimous with footboard 3, and size, shape are decided according to design demand and boundary condition, mainly used strengthen footboard arm 2 and footboard 3 welding strength, prevent the risk that the footboard drops in the use.

The rotating shaft bushing 1, the pedal arm 2, the pedal 3 and the supporting block 4 are welded together to form a hollow brake pedal arm assembly.

Claims

1. A brake pedal comprises a rotating shaft bushing (1), a pedal arm (2) and a pedal (3); the method is characterized in that: the pedal arm (2) is hollow; a rotating shaft bushing is welded at the front end of the pedal arm (2), and is assembled on the pedal bracket body through the rotating shaft bushing (1) and the rotating shaft, and the rotating shaft is fixed on the pedal bracket body in a riveting mode; the rear end of the pedal arm (2) is welded with a pedal (3), and a supporting block (4) is arranged at the included angle between the pedal arm and the pedal.

2. The brake pedal of claim 1 wherein: a welded rotating shaft bushing sleeve hole (21) is punched at the front section of the pedal arm (2), and the size of the hole diameter is matched with the outer diameter of the rotating shaft bushing (1); furthermore, a safety distance of 10mm is reserved between the most front end edge of the rotating shaft bushing hole (21) and the most front end edge of the pedal arm (2).

3. The brake pedal of claim 2 wherein: during assembly, the pedal arm (2) and the pedal mounting bracket body reserve a safety distance not less than 5mm, and the pedal arm and the pedal mounting bracket body are ensured not to interfere with the pedal bracket body in the braking process.

4. The brake pedal of claim 1 wherein: the lower surface of the pedal (3) is provided with a reinforcing rib (31).

5. The brake pedal of claim 1 wherein: the middle section of the pedal arm (2) is close to the front position and is provided with an inwards-concave booster shifting fork mounting surface (22), and the concave surface is matched with the opening size of the booster shifting fork.

6. The brake pedal of claim 5 wherein: the depth of the recess of the mounting surface (22) of the shifting fork of the booster needs to meet the requirement that the shifting fork of the booster does not interfere with or block the recess during the full-stroke movement of the brake pedal.

7. The brake pedal of claim 1 wherein: the pedal arm (2) is of a single-layer structure, after being subjected to punch forming, two sides of the pedal arm are bent towards the middle, the folding position is closed in a welding mode, and the whole pedal arm folding position is completely welded.

8. The brake pedal of claim 1 wherein: the pedal arm (2) is made of SPHC plates with the thickness of 2mm by stamping; furthermore, the rotating shaft bushing (1) is made of a formed round steel pipe; furthermore, the pedal (3) and the supporting block (4) are made of SPHC plates with the thickness of 3mm through stamping.

9. The brake pedal of claim 1 wherein: the pedal arm (2) is straight in the X-axis direction.

10. The brake pedal of claim 1 wherein: the pedal arm (2) gradually narrows from front to back; furthermore, the width of the pedal arm (2) in the Y-axis direction is 12-15 mm.