Dustproof sleeve connecting structure of input shaft of automobile steering device
By adopting a concave and convex groove clamping structure between the dustproof sleeve of the input shaft of the automobile steering wheel and the rotary housing, the problem of insufficient retention force of the dustproof sleeve connection structure is solved, and better sealing, sound insulation and protection are achieved The stability of the dust cover avoids abnormal steering noise.
Patent Information
- Application Number
- CN202420259191.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-02-02
AI Technical Summary
The existing automotive steering wheel input shaft dust cover connection structure is insufficient, which causes the dust cover to be skewed or loose when the engine is separated. During the vehicle driving, the dust cover and the machine rotating input shaft will collide, causing abnormal steering. ring.
Adopting a concave and convex groove clamping structure, the connection ring groove is set on the outer wall of the machine-rotating housing and the inner wall of the dustproof sleeve to insert and interfere, enhancing the stability of the connection. .
It effectively improves the retention force of the dustproof sleeve, prevents loosening or falling off, improves sealing and sound insulation, and avoids abnormal steering noise.
Smart Images
Figure CN222479438U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile accessories, in particular to a dust cover connection structure of an automobile steering gear input shaft. Background Art
[0002] The steering shaft of a car is a force transmission shaft used to transmit the steering torque applied by the driver to the steering wheel to the steering gear. Its upper part is fixedly connected to the steering wheel, and the steering gear is installed at the lower part. Therefore, the upper end of the input shaft needs to pass through the through hole on the body sheet metal and extend into the cab to connect with the steering wheel. In order to prevent rain, dust, external air, noise, etc. from entering the cab, it is necessary to set a steering shaft dust cover between the through hole and the steering shaft for isolation. The existing dustproof structure only consists of a dust cover, an O-ring and a press-fit interference fit with the motor housing. However, the dust cover holding force of this assembly method is insufficient, and the dust cover assembly may be skewed or loose when the engine is assembled. The dust cover rubs and collides with the motor input shaft during driving, resulting in abnormal steering noise. Therefore, it is necessary to invent a new dust cover connection structure for the input shaft of a car steering gear. Utility Model Content
[0003] The utility model aims to provide a dust cover connection structure for an automobile steering gear input shaft, so as to solve the problem of insufficient holding force of the existing automobile steering gear dust cover connection structure.
[0004] The technical solution adopted by the utility model to solve its technical problems is:
[0005] A dust cover connection structure for an automobile steering gear input shaft comprises a dust cover, wherein the lower part of the dust cover is sleeved on the outer side wall of a mechanical housing, a connecting ring groove is circumferentially provided on the outer side wall of the mechanical housing, a connecting convex ring is provided on the inner side wall of the dust cover at a position corresponding to the connecting ring groove, the connecting convex ring is inserted into the connecting ring groove, and the connecting convex ring and the connecting ring groove are interference fit.
[0006] Furthermore, the connection between the side surface and the upper end surface of the connecting protruding ring is a right angle, and the connection between the upper end surface and the side surface of the connecting ring groove is a right angle.
[0007] Furthermore, a chamfer is provided at the connection between the side surface and the lower end surface of the connecting protruding ring, and a chamfer is provided at the connection between the lower end surface of the connecting ring groove and the outer side wall of the rotating housing.
[0008] Furthermore, a chamfered surface is provided on the inner side wall of the dust cover below the connecting protruding ring.
[0009] Furthermore, a sealing ring groove is formed on the outer side wall of the mechanical housing along the circumferential direction, a sealing ring is arranged in the sealing ring groove, and the sealing ring is interference-fitted with the inner side wall of the dust cover.
[0010] Furthermore, the sealing ring groove is located above the connecting ring groove.
[0011] The beneficial effects of the utility model are as follows: the utility model adds a concave-convex groove clamping structure on the basis of the original interference fit of the sealing ring to the connection mode between the mechanical housing and the dust cover. On the one hand, it can make the connection seamless, the sealing and sound insulation are better, and the modification method is simple and the cost is low; on the other hand, the holding force of the dust cover is strengthened, which can effectively prevent the dust cover from loosening or falling off.
[0012] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The utility model is a connection structure diagram of a dust cover of an automobile steering gear input shaft.
[0014] Figure 2 It is a partial structural enlarged view of a dust cover connection structure of an automobile steering gear input shaft according to the utility model. DETAILED DESCRIPTION
[0015] like Figure 1 and Figure 2 The dust cover connection structure of the input shaft of an automobile steering gear shown in the figure comprises a dust cover 1, the lower part of which is sleeved on the outer side wall of a mechanical housing 2, a connecting ring groove 21 is circumferentially provided on the outer side wall of the mechanical housing 2, a connecting convex ring 11 is protruded on the inner side wall of the dust cover 1 at a position corresponding to the connecting ring groove 21, the connecting convex ring 11 is inserted into the connecting ring groove 21, and the connecting convex ring 11 and the connecting ring groove 21 are interference fit.
[0016] Preferably, in combination with the above-mentioned solution, in order to make the connection more stable and effectively prevent the dust cover 1 from loosening or falling off during collision or impact, the connection between the side surface and the upper end surface of the connecting convex ring 11 is a right angle, and the connection between the upper end surface and the side surface of the connecting ring groove 21 is a right angle.
[0017] Preferably, in combination with the above scheme, in order to facilitate pressing the connecting protrusion ring 11 into the connecting ring groove 21, a chamfer is provided at the connection between the side surface and the lower end surface of the connecting protrusion ring 11, and a chamfer is provided at the connection between the lower end surface of the connecting ring groove 21 and the outer side wall of the rotating housing 2.
[0018] Preferably, in combination with the above solution, in order to facilitate the installation of the dust cover 1 on the rotary housing 2, a chamfered surface 12 is provided on the inner wall of the dust cover 1 below the connecting protruding ring 11.
[0019] Preferably, in combination with the above scheme, in order to cooperate with the connecting convex ring 11 and the connecting ring groove 21 for sealing, the outer wall of the mechanical housing 2 is provided with a sealing ring groove 22 along the circumferential direction, and an O-ring 3 is arranged in the sealing ring groove 22, and the sealing ring 3 is interference fit with the inner wall of the dust cover 1.
[0020] Preferably, in combination with the above solution, in order to facilitate assembly and ensure a better sealing effect, the sealing ring groove 22 is located above the connecting ring groove 21 .
[0021] It should be noted that all directional indications in the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0022] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or they are directly applied to other occasions without improvement, they all fall within the protection scope of the utility model.
Claims
1. A dust cover connection structure for an automobile steering gear input shaft, comprising a dust cover (1), wherein the lower portion of the dust cover (1) is sleeved on the outer side wall of a mechanical housing (2), wherein: A connecting ring groove (21) is provided on the outer wall of the mechanical housing (2) along the circumferential direction, and a connecting convex ring (11) is provided on the inner wall of the dust cover (1) at a position corresponding to the connecting ring groove (21). The connecting convex ring (11) is inserted into the connecting ring groove (21), and the connecting convex ring (11) and the connecting ring groove (21) are interference fit.
2. The automobile steering gear input shaft dust cover connection structure according to claim 1 is characterized in that: The connection between the side surface and the upper end surface of the connecting convex ring (11) is a right angle, and the connection between the upper end surface and the side surface of the connecting ring groove (21) is a right angle.
3. The automobile steering gear input shaft dust cover connection structure according to claim 1 is characterized in that: A chamfer is provided at the connection between the side surface and the lower end surface of the connecting convex ring (11), and a chamfer is provided at the connection between the lower end surface of the connecting ring groove (21) and the outer side wall of the rotating housing (2).
4. The automobile steering gear input shaft dust cover connection structure according to claim 1 is characterized in that: A chamfered surface (12) is provided on the inner side wall of the dust cover (1) at a position below the connecting protruding ring (11).
5. The automobile steering gear input shaft dust cover connection structure according to claim 1, characterized in that: The outer wall of the mechanical housing (2) is provided with a sealing ring groove (22) along the circumferential direction, a sealing ring (3) is arranged in the sealing ring groove (22), and the sealing ring (3) is interference-fitted with the inner wall of the dust cover (1).
6. The automobile steering gear input shaft dust cover connection structure according to claim 5, characterized in that: The sealing ring groove (22) is located above the connecting ring groove (21).