Steering shaft dust cover

Abstract

The utility model relates to the field of automobile, disclose a kind of steering shaft dust cover, including dust cover body, dust cover body includes first fixed section and second fixed section, first fixed section is fixedly connected with cab bottom plate, second fixed section is fixedly connected with steering machine input shaft, it is provided with the connecting neck of flexible material between first fixed section and second fixed section, and the both ends of connecting neck are fixedly connected with first fixed section and second fixed section respectively.This scheme is by splitting dust cover body into relatively independent first fixed section and second fixed section, and by connecting neck, first fixed section and second fixed section are flexibly connected, to reduce the extrusion abnormal sound between dust cover and steering machine input shaft when steering machine input shaft center and dust cover center are not concentric.

Description

Technical Field

[0001] This solution relates to the automotive industry, specifically to a steering shaft dust cover. Background Technology

[0002] In a car cab, the steering wheel is connected to the steering gear via a steering input shaft, allowing the steering mechanism to be controlled and the car's steering operations completed. During connection, the steering input shaft passes through a hole in the cab floor and is assembled with the lower steering fork inside the cab. Because there is a gap between the steering input shaft and the hole in the cab floor, dust from the engine may enter the cab. To avoid this problem, a dust cover has been designed, such as... Figure 1 As shown, the dust cover 1 is embedded in the round hole of the cab floor plate 2 through a designed concave circular groove, thereby fixing the dust cover 1 to the cab floor plate 2 and having a certain locking force so that the dust cover 1 will not rotate due to the rotation of the steering gear input shaft 3 during use. At the same time, the steering gear input shaft 3 is inserted into the cab through the through hole reserved between the lips of the dust cover 1, and the steering gear input shaft 3 and the lip of the dust cover 1 are designed with a slight interference fit so that water and dust can enter the cab from between the steering gear input shaft 3 and the lip of the dust cover 1.

[0003] However, due to unavoidable manufacturing errors, the center of the steering gear input shaft cannot be concentric with the center of the hole in the cab floor, that is, the center of the steering gear input shaft is not concentric with the center of the dust cover. This causes the outer surface of the steering gear input shaft to be squeezed against the lip of the dust cover, resulting in abnormal noises during use and affecting the user experience. Utility Model Content

[0004] The present invention aims to provide a steering shaft dust cover to reduce squeezing noise between the dust cover and the steering gear input shaft, thereby improving the user experience of the product.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a steering shaft dust cover, comprising a dust cover body, the dust cover body comprising a first fixed section and a second fixed section, the first fixed section being fixedly connected to the cab floor, the second fixed section being fixedly connected to the steering gear input shaft, a flexible connecting neck being provided between the first fixed section and the second fixed section, and the two ends of the connecting neck being fixedly connected to the first fixed section and the second fixed section respectively.

[0006] The beneficial effects of this solution are as follows: By splitting the dust cover body into relatively independent first and second fixed sections, and flexibly connecting the first and second fixed sections through a connecting neck, when manufacturing errors occur, causing the center of the steering gear input shaft to be out of sync with the center of the hole in the cab floor, i.e., when the center of the steering gear input shaft and the center of the dust cover are not concentric, the deformation of the connecting neck prevents the outer surface of the steering gear input shaft from being squeezed against the lip of the dust cover, thereby reducing the squeezing noise between the dust cover and the steering gear input shaft, and thus improving the user experience of the product.

[0007] Furthermore, the outer edge of the first fixed section is provided with a first locking surface and a second locking surface, and the distance between the first locking surface and the second locking surface is adapted to the thickness of the base plate.

[0008] Furthermore, the inner side of the second fixed section is provided with a lip made of flexible material that is adapted to the steering input shaft.

[0009] Furthermore, the inner diameter of the first fixed section, the connecting neck, and the lip gradually decreases.

[0010] Furthermore, at least two lips are provided, with an oil reservoir between adjacent lips. This design, by setting a first fixed section and gradually decreasing the inner diameter of the connecting neck and lips, allows the user to directly replenish the lubricating oil stored in the reservoir from the cab when needed. This significantly reduces the technical requirements for replenishing lubricating oil, thereby lowering the technical requirements for user maintenance.

[0011] Furthermore, the length of the connecting neck accounts for 1 / 3 to 1 / 2 of the total length of the dust cover.

[0012] Furthermore, the length of the connecting neck should be no less than 3cm.

[0013] Furthermore, the thickness of the connecting neck ranges from 1 to 10 mm.

[0014] Furthermore, the flexible material is rubber.

[0015] Furthermore, the first fixing section includes a first locking part and a second locking part. The first locking part is fixedly connected to the connecting neck and has an internal thread on its inner side, while the second locking part has an external thread on its outer side that is compatible with the internal thread. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dust cover assembly mentioned in the background section; Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model; Figure 3 This is an assembly diagram of Embodiment 1 of the present invention; Figure 4 This is a cross-sectional view of Embodiment 2 of the present invention.

[0017] The reference numerals in the accompanying drawings include: dust cover 1, first fixing section 110, first locking surface 111, second locking surface 112, second fixing section 120, lip 121, oil reservoir 122, connecting neck 130, cab floor 2, and input shaft 3. Detailed Implementation

[0018] Example 1 Example 1 is basically as shown in the appendix. Figure 1-3 As shown, Figure 1-3 The dust cover shown is installed between the cab floor 2 and the steering gear input shaft 3. It includes a first fixed section 110, a second fixed section 120 and a connecting neck 130, all integrally molded from rubber. The first fixed section 110 is fixedly connected to the cab floor 2, the second fixed section 120 is fixedly connected to the steering gear input shaft 3, and the connecting neck 130 is disposed between the first fixed section 110 and the second fixed section 120. Both ends of the connecting neck 130 are fixedly connected to the first fixed section 110 and the second fixed section 120, respectively.

[0019] Specifically, such as Figure 2 As shown, the first fixed section 110 is provided with a concave circular groove, which is interference-fitted with the circular hole of the cab floor plate 2 to ensure that the dust cover 1 does not loosen or rotate after being inserted. The concave circular groove includes a first locking surface 111 and a second locking surface 112. The distance between the first locking surface 111 and the second locking surface 112 is adapted to the thickness of the floor plate. In this embodiment, the thickness of the cab floor plate 2 is 2mm, and the distance between the first locking surface 111 and the second locking surface 112 is 1.9mm to ensure an interference fit of 0.1mm.

[0020] The second fixed section 120 includes at least two lips 121. The inner diameter of the lip 121 has an interference fit of 0.2 mm with the steering input shaft 3. An oil reservoir 122 is provided between adjacent lips 121. The oil reservoir 122 can hold a certain volume of grease to ensure lubrication for a certain period of time. In this embodiment, there are two lips 121, and the volume of the oil reservoir 122 is 5 cm³. 3 To meet the lubrication requirements for 6 months / 10,000 kilometers.

[0021] The connecting neck 130 connects the first fixed section 110 and the second fixed section 120, and its length accounts for 1 / 3 to 1 / 2 of the total length of the dust cover 1. In this embodiment, the total length of the dust cover 1 is 16mm, the length of the connecting neck 130 is 8mm, and the thickness is 3mm. This length can cover a concentric deviation of ±3mm. When there is a concentric deviation between the steering gear input shaft 3 and the circular hole in the cab floor 2, the connecting neck 130, through its own elastic deformation, drives the lip 121 of the second fixed section 120 to adaptively adjust its position, so that the lip 121 maintains uniform contact with the steering gear input shaft 3, avoiding one-sided compression, thereby eliminating abnormal noise.

[0022] During installation, such as Figure 3 As shown, firstly, the concave circular groove of the first fixing section 110 of the dust cover 1 is aligned with the circular hole of the cab floor plate 2, and a certain pressure is applied to embed it, so that the first locking surface 111 and the second locking surface 112 are respectively located on both sides of the cab floor plate 2, so as to complete the fixing of the dust cover 1; then, the steering gear input shaft 3 is passed through the second fixing section 120 of the dust cover 1, so that the lip 121 is tightly fitted with the shaft under the interference fit, and a seal is achieved; and the lubricating grease injected in the oil reservoir 122 before assembly is used to provide lubrication for the contact part between the lip 121 and the steering gear input shaft 3.

[0023] Example 2 The difference between this embodiment and embodiment 1 lies in the structure of the first fixing segment 110. The remaining parts (the parameters and materials of the connecting neck 130 and the second fixing segment 120) are the same as those in embodiment 1, and will not be described in detail here.

[0024] like Figure 4 As shown, in this embodiment, the first fixing section 110 is designed with a bottle cap-like structure, including a first locking part and a second locking part. The first locking part is integrally formed with the connecting neck 130, and the second locking part is threadedly connected to the first locking part. Specifically, the first locking part is fixedly connected to the connecting neck 130 and has an internal thread on its inner side, while the second locking part has an external thread on its outer side that matches the internal thread. During installation, the first locking part is aligned with the round hole in the cab floor 2, and the second locking part is rotated to fix the second locking part to the first locking part through the thread, thereby fixing the dust cover 1 to the cab floor 2.

[0025] When maintenance or replacement of the dust cover 1 is required, the second locking part can be reversed to remove it from the round hole in the cab floor 2. The operation is convenient and does not require modification of the cab floor 2 or other components. During use, the connecting neck 130 can also compensate for the concentricity deviation between the steering input shaft 3 and the round hole in the cab floor 2 through elastic deformation, avoiding abnormal noise. The grease in the oil reservoir 122 continuously provides lubrication to the lip 121, ensuring sealing and service life. At the same time, the first fixing section 110 is split into an independent first locking part and a second locking part, making the first fixing section 110 more adaptable to the thickness of the cab floor 2.

[0026] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that the technical means used to solve problems in the above embodiments of this utility model can be combined to solve multiple technical problems simultaneously. For those skilled in the art, several modifications and improvements can be made without departing from the technical solution of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A steering shaft dust cover, characterized in that: It includes a first fixed section and a second fixed section. The first fixed section is fixedly connected to the cab floor plate, and the second fixed section is fixedly connected to the steering gear input shaft. A flexible connecting neck is provided between the first fixed section and the second fixed section, and the two ends of the connecting neck are fixedly connected to the first fixed section and the second fixed section respectively.

2. A steering shaft dust cover according to claim 1, characterized in that: The first fixed section includes a first locking surface and a second locking surface, and the distance between the first locking surface and the second locking surface is adapted to the thickness of the base plate.

3. A steering shaft dust cover according to claim 2, characterized in that: The inner side of the second fixed section is provided with a lip made of flexible material that is adapted to the steering input shaft.

4. A steering shaft dust cover according to claim 3, characterized in that: The inner diameter of the first fixed section, connecting the neck and the lip gradually decreases.

5. A steering shaft dust cover according to claim 4, characterized in that: The number of lips is at least two, and an oil reservoir is provided between adjacent lips.

6. A steering shaft dust cover according to claim 5, characterized in that: The length of the connecting neck accounts for 1 / 3 to 1 / 2 of the total length of the dust cover.

7. A steering shaft dust cover according to claim 5, characterized in that: The length of the connecting neck should be no less than 3cm.

8. A steering shaft dust cover according to claim 6 or 7, characterized in that: The thickness of the connecting neck ranges from 1 to 10 mm.

9. A steering shaft dust cover according to claim 7, characterized in that: The flexible material is rubber.

10. A steering shaft dust cover according to claim 9, characterized in that: The first fixed section includes a first locking part and a second locking part. The first locking part is fixedly connected to the connecting neck and has an internal thread on its inner side. The second locking part has an external thread on its outer side that is compatible with the internal thread.

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