Sealing ring, steering system and automobile

Abstract

The utility model discloses a sealing ring, a steering system and an automobile. The sealing ring comprises a lip part (1) and an O-shaped part (2), the lip part (1) is used for preventing water or air from flowing to the radial inner side from the radial outer side of the sealing ring, and the O-shaped part (2) is used for preventing oil from flowing to the radial outer side from the radial inner side of the sealing ring. According to the sealing ring, creep corrosion of a steering system can be prevented, and oil liquid can be prevented from leaking from the steering system.

Description

Technical Field

[0001] This application relates to the automotive field, and more specifically, to a sealing ring and a steering system and an automobile having such a sealing ring. Background Technology

[0002] The steering system, comprising the steering gear and motor, is one of the most important components of a vehicle. Its primary function is to assist the driver in applying force when turning the steering wheel, enabling easier and more convenient driving.

[0003] In the installed state, the steering gear and motor are assembled together. A gap exists between the steering gear housing and the motor housing. On the one hand, water or air from the outside may enter the steering system through this gap, causing creep corrosion; on the other hand, oil in the steering system may leak out through this gap, causing leakage. Utility Model Content

[0004] The main technical problem this application aims to solve is how to prevent both creep corrosion of the steering system and oil leakage from the steering system.

[0005] To solve the above-mentioned technical problems, this application provides a sealing ring, which includes a lip and an O-ring. The lip is used to prevent water or air from flowing from the radially outer side to the radially inner side of the sealing ring, and the O-ring is used to prevent oil from flowing from the radially inner side to the radially outer side of the sealing ring.

[0006] According to one aspect of this application, the sealing ring includes two lips and an O-ring.

[0007] According to one aspect of this application, the O-ring portion is located radially inside the sealing ring relative to the lip portion.

[0008] According to one aspect of this application, in a cross-section parallel to the axis of the sealing ring, the lip portion is lip-shaped and the O-shaped portion is O-shaped.

[0009] According to one aspect of this application, the sealing ring has a radially inner surface of the O-ring that is planar.

[0010] According to one aspect of this application, the sealing ring has a radial length of the O-ring for sealing greater than 0.5 mm.

[0011] According to one aspect of this application, the sealing ring is made of rubber.

[0012] On the other hand, this application provides a steering system that includes the aforementioned sealing ring, which is located between the motor housing and the steering gear housing.

[0013] According to one aspect of the present application, a steering system is provided in which the sealing ring communicates with the outside through a channel between the motor housing and the steering gear housing, wherein the distance between the motor housing and the steering gear housing in the channel is greater than 2 mm.

[0014] In another aspect, this application provides an automobile that includes the aforementioned sealing ring.

[0015] According to the technical solution of this application, the sealing ring includes a lip and an O-ring. The lip is used to prevent water or air from flowing from the radially outer side to the radially inner side of the sealing ring, and the O-ring is used to prevent oil from flowing from the radially inner side to the radially outer side of the sealing ring, thereby preventing creep corrosion of the steering system and preventing oil leakage from the steering system. Attached Figure Description

[0016] The disclosure of this application is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Wherein:

[0017] Figure 1 A sealing ring according to one embodiment of this application is schematically shown in cross-sectional view;

[0018] Figure 2 A 3D diagram is shown schematically. Figure 1 The sealing ring in the middle;

[0019] Figure 3 Schematic representation Figure 1 The sealing ring is in the installed state. Detailed Implementation

[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of this application.

[0021] Please see Figure 1 As shown, a sealing ring 10 according to a specific embodiment of this application includes a lip portion 1 and an O-ring portion 2. The lip portion 1 prevents water or air from flowing from the radially outer side to the radially inner side of the sealing ring, and the O-ring portion 2 prevents oil from flowing from the radially inner side to the radially outer side of the sealing ring. The lip portion 1 and the O-ring portion 2 are integrally constructed in the sealing ring, and the lip portion 1 and the O-ring portion 2 are connected together by a connecting portion. Figure 2 As shown, the sealing ring is generally constructed as a ring. A ray extending from the center of the ring towards the sealing ring is radial. The side of the sealing ring closer to the center of the ring is the radially inner side, and the side of the sealing ring farther from the center of the ring is the radially outer side. The sealing ring can be made of rubber, such as nitrile rubber.

[0022] The sealing ring can be located between the motor housing and the steering gear housing, specifically, between the mating end faces of the motor housing and the steering gear housing.

[0023] The steering gear includes a screw, a nut surrounding the screw, and a ball recirculation system between the screw and the nut. The ball recirculation system converts the rotational motion of the screw into the linear motion of the nut. A mounting plate is provided at the steering gear housing for mounting a motor. The motor provides at least part of the steering force to the screw via a worm gear, thus assisting in steering.

[0024] The gap between the steering gear housing and the motor housing is sealed by the sealing ring, with the lip 1 and the O-ring 2 at least partially filling the gap. The lip 1 prevents water (especially salt water), air, or other impurities from flowing radially from the outer side to the inner side of the sealing ring, i.e., from the outside into the gap, thereby preventing creep corrosion of the steering system. The O-ring 2 prevents oil from flowing radially from the inner side to the outer side of the sealing ring, i.e., from the gap to the outside, thereby preventing oil leakage from the steering system.

[0025] The sealing ring is suitable for use in new energy vehicles. For example, in a light commercial vehicle where oil can enter the steering gear, the sealing ring can prevent both creep corrosion of the steering system and oil leakage from the steering system.

[0026] like Figure 1 As shown, in a cross-section parallel to the axis of the sealing ring, the lip portion 1 is generally lip-shaped, and the O-shaped portion 2 is generally O-shaped.

[0027] In the radial direction, the length of the O-ring 2 that can be used for sealing is greater than the length of the lip portion 1 that can be used for sealing. The length of the O-ring 2 that can be used for sealing is greater than 0.5 mm; that is, in the installed state, the sections of the O-ring 2 that contact the motor housing and the steering gear housing respectively are greater than 0.5 mm.

[0028] For example, the sealing ring includes two lip portions 1 and an O-ring portion 2, such as Figure 1 As shown. The O-ring 2 is closer to the radially inner side of the sealing ring than the lip portion 1. Furthermore, the sealing ring may also include a lip portion 1 that is closer to the radially inner side of the sealing ring than the O-ring 2, which is also within the scope of this application.

[0029] The radially inner side of the O-ring 2 is planar. The radially inner side of the O-ring 2 contacts the steering gear housing and / or the motor housing between the steering gear housing and the motor housing. The planar structure of the radially inner side of the O-ring 2 facilitates the assembly of the sealing ring.

[0030] This application also includes a steering system with a sealing ring of any one or more of the foregoing embodiments, the technical features and effects of which correspond to the foregoing description, and therefore will not be repeated here. In this steering system, the sealing ring is located between the motor housing and the steering gear housing.

[0031] For example, refer to Figure 3 As shown, the upper side of the sealing ring contacts the motor housing, and the lower side of the sealing ring contacts the steering gear housing. The motor's output shaft (not shown) passes through the sealing ring vertically. Furthermore, a channel 3 exists between the motor housing and the steering gear housing, connecting the sealing ring to the outside environment. In this channel 3, the distance between the motor housing and the steering gear housing is greater than 2 mm. This prevents external liquids, such as water, from remaining in the channel due to capillary action, thereby preventing creep corrosion of the steering system.

[0032] This application also includes an automobile having a sealing ring of any one or more of the foregoing embodiments, the technical features and effects of which correspond to the foregoing description, and therefore will not be repeated here.

Claims

1. A seal ring, characterized by, The sealing ring (10) comprises a lip portion (1) for preventing water or air from flowing from the radial outside to the radial inside of the sealing ring and an O-shaped portion (2) for preventing oil from flowing from the radial inside to the radial outside of the sealing ring.

2. The seal ring of claim 1, wherein The sealing ring comprises two lip portions (1) and one O-shaped portion (2).

3. The seal ring of claim 1, wherein The O-shaped portion (2) is located closer to the radial inside of the sealing ring than the lip portion (1).

4. The seal ring of claim 1, wherein In a cross section parallel to the axis of the sealing ring, the lip portion (1) is configured in the shape of a lip and the O-shaped portion (2) is configured in the shape of an O.

5. The seal ring of claim 4, wherein, The radial inside of the O-shaped portion (2) is configured as a flat surface.

6. The seal ring of claim 1, wherein In the radial direction, the length of the O-shaped portion (2) for sealing is greater than 0.5 mm.

7. The seal ring of claim 1, wherein The sealing ring is made of rubber.

8. A steering system characterized by, It comprises a sealing ring according to any one of claims 1 to 7 between the motor housing and the steering housing.

9. The steering system of claim 8, wherein, There is a passage between the motor housing and the steering housing, which is in communication with the outside, and in which the distance between the motor housing and the steering housing is greater than 2 mm.

10. An automobile characterized by comprising: It comprises a sealing ring according to any one of claims 1 to 7.

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