Sealing structure of automobile steering system and automobile body

Abstract

The utility model discloses a sealing structure for an automobile steering system and an automobile body. The sealing structure comprises a steering intermediate shaft, an automobile body front wall, a sealing sleeve, a sealing sleeve base and a steering gear assembly. The sealing sleeve base is installed on the steering gear assembly, the sealing sleeve is installed above the sealing sleeve base, the sealing sleeve base is in interference fit with a shell of the steering gear assembly, and a radial gap is reserved between the sealing sleeve base and the input shaft. The sealing sleeve and the sealing sleeve base are in interference fit and are made of foam or soft rubber, sealing is achieved through the compression amount of 5-10 mm, and the diameter of the sealing sleeve is larger than the diameter of a through hole in the front wall of a vehicle body by 20 mm or above. The sealing device is simple in structure, convenient to mount and dismount, good in sealing performance and high in adaptability. The sealing sleeve base is made of nylon materials, and the height of the sealing sleeve base can be adjusted according to the length of the input shaft. The sealing structure effectively solves the problems of high precision requirement, difficulty in assembly and poor sealing performance of the sealing structure in the prior art, and is suitable for the field of automobile manufacturing.

Description

Technical Field

[0001] The utility model relates to the field of automobile manufacturing, and more specifically, to a sealing structure between an automobile steering system and a vehicle body. Background Art

[0002] At present, the steering function of an automobile is realized through a steering system, which usually includes a steering wheel, a steering column, an intermediate steering shaft, a steering gear, etc. The steering wheel and the steering column are assembled inside the cab, while the steering gear is assembled in the front compartment (engine compartment). The steering column and the steering gear are connected by an intermediate steering shaft, and the intermediate steering shaft usually needs to pass through a through-hole in the vehicle body. Since the cab needs to be sealed and the noise reduced, this through-hole usually needs to be sealed.

[0003] In the prior art, as Figure 2 , a commonly used sealing structure is to use a sealing rubber sleeve, which is sealed by being sleeved between the steering gear and the front body panel (floor). However, this structure has high requirements for the size and position accuracy of the through-hole in the front body panel. During the vehicle body welding and subframe manufacturing processes, due to possible deviations in the X or Y direction of the through-hole, it is difficult to install or disassemble the sealing rubber sleeve, the sealing performance is poor, and interference abnormal noises are likely to occur. This structure is complex in assembly and low in production efficiency. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a new sealing structure between an automobile steering system and a vehicle body to solve the problems of high accuracy requirements, difficult disassembly and assembly, and poor sealing performance existing in the prior art sealing structure.

[0005] To achieve the above object, the utility model provides the following technical solutions, mainly including:

[0006] A sealing structure for an automobile steering system and a vehicle body, including an intermediate steering shaft, a front body panel, a sealing sleeve, a sealing sleeve base, and a steering gear assembly; the sealing sleeve base is installed on the steering gear assembly, the sealing sleeve is installed above the sealing sleeve base, the sealing sleeve base is in interference fit with the housing of the steering gear assembly, and a radial clearance is left between it and the input shaft; the sealing sleeve and the sealing sleeve base are assembled in an interference fit, the sealing sleeve is made of foam or soft rubber, its compression amount is 5 - 10 mm, and the diameter size of the sealing sleeve is 20 mm or more larger than the diameter of the through-hole in the front body panel.

[0007] Preferably, the sealing sleeve base is made of nylon material.

[0008] Preferably, the height of the sealing sleeve base is adjusted according to the length of the input shaft.

[0009] Preferably, when the sealing sleeve is in a compressed state, there is no interference between the sealing sleeve base and the front body panel.

[0010] Preferably, the sealing sleeve and the housing are connected by interference fit, so that the sealing performance is enhanced.

[0011] It can be seen from the above technical solution that compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) Simple structure: The combined design of the sealing sleeve 3 and the sealing sleeve base 4 makes the sealing structure simple and easy to install and disassemble.

[0013] (2) Good sealing performance: By adjusting the compression amount of the sealing sleeve 3, the influence of the manufacturing accuracy problem on the sealing performance can be effectively solved to ensure the sealing effect.

[0014] (3) Strong adaptability: The manufacturing accuracy requirements in the X and Y directions are relatively low, which improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 Schematic diagram of commonly used sealing structure.

[0018] Among them: 1. Steering intermediate shaft; 2. Vehicle body front wall; 3. Sealing sleeve; 4. Sealing sleeve base; 5. Steering gear assembly; 6. Housing; 7. Input shaft. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] A sealing structure between a vehicle steering system and a vehicle body, see Figure 1 , including the following components:

[0022] Steering intermediate shaft 1: Used to connect the steering column and the steering gear assembly 5.

[0023] Body front panel (floor) 2: Provided with a through-hole for passing through the steering intermediate shaft 1.

[0024] Sealing sleeve 3: Installed above the sealing sleeve base 4, made of foam or soft rubber, and its compression amount is generally 5 - 10 mm to ensure effective sealing after installation.

[0025] Sealing sleeve base 4: Made of nylon material, fixedly installed with the body front panel (floor) 2. The lower end of the sealing sleeve base 4 is in interference fit with the housing 6 of the steering gear assembly, and at the same time, a radial clearance is left between the sealing sleeve base 4 and the input shaft 7 of the steering gear assembly.

[0026] Steering gear assembly 5: Comprises a housing 6 and an input shaft 7.

[0027] During installation, the lower end of the sealing sleeve base 4 is in interference fit with the housing 6 of the steering gear assembly, and a radial clearance is left between it and the input shaft 7 of the steering gear assembly. The upper end of the sealing sleeve 3 is in interference fit with the upper end of the sealing sleeve base 4 to ensure good sealing effect after compression. By adjusting the height of the sealing sleeve 3, the Z-direction offset problem caused by manufacturing accuracy can be addressed, while the influence of X-direction and Y-direction accuracy on the sealing structure is relatively small.

[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing structure for a vehicle steering system and a vehicle body, characterized in that: The invention comprises a steering intermediate shaft (1), a front panel of a vehicle body (2), a sealing sleeve (3), a sealing sleeve base (4) and a steering gear assembly (5); the sealing sleeve base (4) is installed on the steering gear assembly (5), the sealing sleeve (3) is installed above the sealing sleeve base (4), the sealing sleeve base (4) is interference fit with a housing (6) of the steering gear assembly, and a radial clearance is left between the sealing sleeve base (4) and the input shaft (7); the sealing sleeve (3) and the sealing sleeve base (4) are assembled in an interference fit, the sealing sleeve (3) is made of foam or soft rubber, the compression amount of which is 5-10 mm, and the diameter of the sealing sleeve (3) is 20 mm or more larger than the diameter of the through hole of the front panel of the vehicle body (2).

2. A sealing structure for a vehicle steering system and a vehicle body according to claim 1, characterized in that: The sealing sleeve base (4) is made of nylon.

3. A sealing structure for a vehicle steering system and a vehicle body according to claim 1, characterized in that: The height of the sealing sleeve base (4) is adjusted according to the length of the input shaft (7).

4. A sealing structure for a vehicle steering system and a vehicle body according to claim 1, characterized in that: When the sealing sleeve (3) is in a compressed state, the sealing sleeve base (4) and the front wall (2) of the vehicle body remain non-interfering.

5. The sealing structure for a vehicle steering system and a vehicle body according to claim 1, characterized in that: The interference fit connection between the sealing sleeve (3) and the housing (6) enhances the sealing performance.

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