Plastic brake pedal assembly

Abstract

The utility model relates to the field of automobile brake pedals, in particular to a plastic brake pedal assembly. Comprising a plastic pedal shell and a brake arm, a rotating shaft is arranged on the plastic pedal shell and penetrates through the brake arm, the brake arm can rotate relative to the plastic pedal shell, and a return spring used for resetting the brake arm is arranged between the brake arm and the plastic pedal shell; a limiting protrusion is fixed to the end, close to the plastic pedal shell, of the brake arm, and a limiting block right opposite to the brake arm is arranged on the plastic pedal shell. The plastic brake pedal assembly solves the problem that the brake arm cannot return completely.

Description

Technical Field

[0001] The utility model relates to the field of automobile brake pedals, in particular to a plastic brake pedal assembly. Background Art

[0002] The automotive brake vacuum booster assembly, also known as the brake booster, is a key component in the vehicle's braking system and is widely used in passenger cars and light-duty vehicles. The vacuum booster is connected to the booster mounting hole on the brake pedal arm via a pin. Its function is to utilize the vacuum from the engine's intake manifold or vacuum pump as a source of vacuum to achieve higher brake fluid pressure, reducing driver workload and improving vehicle comfort. The reduced weight of the brake pedal reduces overall vehicle mass and improves fuel economy.

[0003] Traditional brake boosters are typically made of metal, which has numerous components. During installation, the metal housing and bracket are welded together. However, in actual production, welding often results in errors, which can lead to defective products. Furthermore, metal brake boosters are heavy and expensive.

[0004] Later, a kind of automobile brake plastic pedal bracket appeared, as shown in the patent application number CN201320754372.4, which is provided with an integrally injection-molded plastic pedal bracket body. The plastic pedal bracket body has several mounting holes, and the adjusting bushings, positioning bushings and mounting bushings are respectively pressed into the mounting holes. The plastic pedal bracket body fixes the vacuum booster to the front panel of the vehicle body through the adjusting bushings, positioning bushings and mounting bushings. The inner side of the plastic bracket body is configured as an arc surface, which cooperates with the arc surface of the piston ring of the vacuum booster.

[0005] The above patent uses a vacuum booster to assist the pedal's brake arm in rotating and driving the brake arm to return to its original position. However, in actual implementation, the vacuum booster may not be able to return completely. At this time, the brake arm has no idle travel and may even be in a braking state all the time in severe cases, thereby affecting vehicle driving. Utility Model Content

[0006] The utility model aims to provide a plastic brake pedal assembly to solve the problem that the brake arm cannot be fully returned to its original position.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a plastic brake pedal assembly, including a plastic pedal housing and a brake arm, a rotating shaft is provided on the plastic pedal housing, the rotating shaft passes through the brake arm, the brake arm can rotate relative to the plastic pedal housing, and a return spring is provided between the brake arm and the plastic pedal housing for resetting the brake arm; a limiting protrusion is fixed on one end of the brake arm close to the plastic pedal housing, and a limiting block is provided on the plastic pedal housing facing the brake arm.

[0008] The beneficial effects of this program are:

[0009] In this solution, the brake arm automatically resets after rotation under the action of a return spring, rather than relying on a vacuum booster for return. This prevents the brake arm from being unable to fully return due to the vacuum booster. Furthermore, the stopper protrusion in this solution works in conjunction with the stop block to limit the rotation angle of the brake arm during reset, preventing it from rotating excessively beyond the preset position. This ensures that the brake arm remains in a position suitable for the driver's application, improving the driver's experience.

[0010] Furthermore, the cross section of the limiting block is arc-shaped.

[0011] The beneficial effects of this solution are as follows: the limit block in this solution is lighter in weight, and the arc-shaped structure enables the limit block to maintain a higher strength and is not easily damaged when subjected to force.

[0012] Furthermore, the return spring is a torsion spring, and both ends of the torsion spring are respectively connected to the brake arm and the plastic pedal housing.

[0013] The beneficial effect of this solution is that the torsion spring can automatically reset the brake arm more quickly.

[0014] Furthermore, a sleeve is sleeved on the rotating shaft, the sleeve is located between the brake arm and the rotating shaft, and the brake arm and the sleeve are rotatably matched, and two limit plates are fixed on the sleeve, and the two limit plates are respectively located on both sides of the brake arm.

[0015] The beneficial effects of this solution are as follows: the limit plate in this solution can limit the brake arm, preventing the brake arm from sliding axially along the rotating shaft, thereby preventing the brake arm from axially compressing the return spring. Secondly, because the brake arm is limited by the limit plate, the brake arm no longer needs to be restrained by the plastic pedal housing on both sides. Therefore, a gap can be provided between the side walls of the plastic pedal housing and the brake arm, reserving sufficient space for the installation of the angle sensor and return spring, thereby facilitating the installation of the angle sensor, return spring, and other structures.

[0016] Furthermore, the limiting plate is annular.

[0017] The beneficial effect of this solution is that the contact area between the annular limiting plate and the brake arm is larger, which can better limit the brake arm.

[0018] Furthermore, a plurality of reinforcing ribs are fixed on the plastic pedal housing, and the reinforcing ribs include transverse portions and longitudinal portions distributed in a well shape; a reinforcing plate is also fixed on the plastic pedal housing, and the reinforcing plate runs through both the transverse portion and the longitudinal portion.

[0019] The beneficial effects of this solution are: the reinforcing ribs in this solution can improve the strength of the plastic pedal shell, and the reinforcing plate and the reinforcing ribs form a triangular support relationship, thereby improving the strength of the reinforcing ribs, and cooperating with the reinforcing ribs, further making the strength of the plastic pedal shell higher.

[0020] Furthermore, a fixing hole is provided on the plastic pedal shell, and an extension sleeve is fixed on the plastic pedal shell, the extension sleeve is opposite to the fixing hole, the side wall of the extension sleeve includes an inner layer and an outer layer, a weight reduction cavity is formed between the inner layer and the outer layer, and a number of support plates are provided between the outer layer and the inner layer, the number of support plates are distributed along the circumference of the extension sleeve, and the two ends of the support plates are respectively fixed on the outer wall of the inner layer and the inner wall of the outer layer.

[0021] The beneficial effects of this solution are as follows: when installing the brake pedal assembly, it is necessary to pass fasteners such as bolts through the fixing holes and install the housing of the brake pedal assembly on the vehicle body. The extension sleeve in this solution is located below the fixing hole, and the fastener passes through the fixing hole and then through the extension sleeve. At this time, the extension sleeve is used to increase the contact area with the fastener, so that when the brake pedal assembly is subjected to force, the outer shell around the fastener is not easily damaged. Compared with a single-layer structure, the extension sleeve in this solution has a double-layer structure, and the design of the support plate can further increase the strength of the side wall of the extension sleeve, so that the extension sleeve is not easily damaged when subjected to force. Compared with directly setting a thicker side wall, the design of the weight-reducing cavity makes the extension sleeve in this solution lighter while the outer diameter, inner diameter and length remain unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 Right view of;

[0024] Figure 3 for Figure 1 Left view of;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The figure marks in the drawings of the specification include: plastic pedal shell 1, longitudinal part 11, transverse part 12, fixing hole 13, limit block 14, reinforcement plate 15, brake arm 2, limit protrusion 21, return spring 3, rotating shaft 4, sleeve 5, limit plate 51, extension sleeve 6, inner sleeve 61, outer sleeve 62, support plate 63.

[0028] Example

[0029] The embodiment is basically as follows Figure 1 As shown, a plastic brake pedal assembly includes a plastic pedal housing 1 and a brake arm 2. The plastic pedal housing 1 is made of plastic. The top and bottom of the plastic pedal housing 1 are integrally formed with reinforcing ribs. Specifically, Figure 2 As shown, the reinforcement ribs include a transverse portion 12 and a longitudinal portion 11 distributed in a well shape. Figure 3 A reinforcing plate 15 is also integrally formed at the bottom of the plastic pedal housing 1. The reinforcing plate 15 obliquely penetrates the transverse portion 12 and the longitudinal portion 11 at the bottom of the plastic pedal housing 1, forming a triangular support relationship between the transverse portion 12 and the longitudinal portion 11, thereby improving the strength of the reinforcing ribs and thus better improving the strength of the plastic pedal housing 1.

[0030] The plastic pedal housing 1 is provided with a plurality of fixing holes 13, and an extension sleeve 6 is provided below the fixing holes 13. Figure 4 The extension sleeve 6 in this embodiment includes an inner sleeve 61 and an outer sleeve 62. The outer sleeve 62 is sleeved onto the inner sleeve 61. The fixing hole 13, the inner sleeve 61, and the outer sleeve 62 are all coaxial. The outer diameter of the inner sleeve 61 is smaller than the inner diameter of the outer sleeve 62, forming a weight-reducing cavity between the inner sleeve 61 and the outer sleeve 62. Several support plates 63 are evenly arranged along the circumference of the weight-reducing cavity. One end of each support plate 63 is connected to the inner sleeve 61, and the other end is connected to the outer sleeve 62. In this embodiment, the top of the support plate 63, the inner sleeve 61, the outer sleeve 62, and the plastic pedal housing 1 are all integrally injection molded.

[0031] The plastic pedal housing 1 has mounting holes on both ends. Metallic rotating shaft 4 bushings are press-fitted into the mounting holes. The ends of the rotating shaft 4 are mounted on the plastic pedal housing 1 via the rotating shaft 4 bushings. A sleeve 5 is sleeved onto the rotating shaft 4. The rotating shaft 4 and sleeve 5 extend transversely through the brake arm 2, and the brake arm 2 rotates in conjunction with the sleeve 5. Two annular limit plates 51 are welded to the sleeve 5. The two limit plates 51 are located on the left and right sides of the brake arm 2, respectively, to limit the position of the brake arm 2. A return spring 3 is provided on the right side of the brake arm 2. In this embodiment, the return spring 3 is a torsion spring. The ends of the torsion spring are connected to the brake arm 2 and the plastic pedal housing 1, respectively, to automatically reset the brake arm 2 after the brake arm 2 rotates.

[0032] The rear end of the brake arm 2 is integrally formed with a limiting protrusion 21, located at the top of the end of the brake arm 2. A limiting block 14 is integrally formed on the side wall of the plastic pedal housing 1, facing the end of the brake arm 2. The limiting block 14 has an arc-shaped cross-section and faces the limiting protrusion 21. A gap is formed between the inner side of the limiting block 14 and the plastic pedal housing 1, making the limiting block 14 lighter and limiting the rotation angle of the brake arm 2 when the brake arm 2 is reset, preventing the brake arm 2 from rotating too much.

[0033] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A plastic brake pedal assembly comprising a plastic pedal housing and a brake arm, wherein the plastic pedal housing is provided with a rotating shaft which passes through the brake arm, and the brake arm is capable of rotating relative to the plastic pedal housing, characterized in that: A return spring for resetting the brake arm is provided between the brake arm and the plastic pedal housing; a limiting protrusion is fixed to one end of the brake arm close to the plastic pedal housing, and a limiting block facing the brake arm is provided on the plastic pedal housing.

2. The plastic brake pedal assembly according to claim 1, characterized in that: The cross section of the limiting block is arc-shaped.

3. The plastic brake pedal assembly according to claim 2, characterized in that: The return spring is a torsion spring, and the two ends of the torsion spring are respectively connected to the brake arm and the plastic pedal housing.

4. The plastic brake pedal assembly according to claim 3, characterized in that: A sleeve is sleeved on the rotating shaft, and the sleeve is located between the brake arm and the rotating shaft, and the brake arm and the sleeve are rotatably matched. Two limit plates are fixed on the sleeve, and the two limit plates are respectively located on both sides of the brake arm.

5. The plastic brake pedal assembly according to claim 4, characterized in that: The limiting plate is annular.

6. The plastic brake pedal assembly according to claim 1, characterized in that: A plurality of reinforcing ribs are fixed on the plastic pedal housing, and the reinforcing ribs include transverse portions and longitudinal portions distributed in a well shape; a reinforcing plate is also fixed on the plastic pedal housing, and the reinforcing plate passes through both the transverse portion and the longitudinal portion.

7. The plastic brake pedal assembly according to claim 1, characterized in that: A fixing hole is provided on the plastic pedal shell, and an extension sleeve is fixed on the plastic pedal shell. The extension sleeve is opposite to the fixing hole. The side wall of the extension sleeve includes an inner layer and an outer layer. A weight reduction cavity is formed between the inner layer and the outer layer, and several support plates are provided between the outer layer and the inner layer. The several support plates are distributed along the circumference of the extension sleeve, and the two ends of the support plates are respectively fixed on the outer wall of the inner layer and the inner wall of the outer layer.

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