Plastic sensor cover capable of being assembled with metal bearing and used for steering engine
By adding a metal ring inside the sensor cover and vulcanizing it with the plastic sensor cover, radial support and anti-loosening functions are provided, thus solving the problem of insufficient radial stiffness of the steering gear sensor cover, reducing costs and avoiding the risk of abnormal noise and loosening.
Patent Information
- Application Number
- CN202422840387.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The existing steering gear sensor cover has insufficient radial stiffness, which causes radial shaking of the input shaft and abnormal noise. At the same time, there is a risk of metal bearings loosening and sensor cover cracking during use, and the cost is high.
A metal ring is added inside the sensor cover, and the metal ring is connected to the plastic sensor cover through vulcanization. A metal bearing mounting structure is provided inside the metal ring to provide radial support, and a knurled structure is provided on the surface of the metal ring to prevent loosening and maintain the sealing function.
It effectively suppresses radial shaking of the input shaft, avoids abnormal noise and sensor cover cracking, reduces costs, and ensures that the metal bearing will not loosen during long-term use.
Smart Images
Figure CN223420622U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile steering gears, in particular to a plastic sensor cover for a steering gear which can be assembled with a metal bearing. Background Art
[0002] In the steering system, the sensor cover's main function is to prevent water, dust, and oil. In existing sensor cover designs, its sealing function is mainly achieved by the cooperation between the shaft seal ring and the input shaft, and the cooperation between the O-ring and the long housing.
[0003] With the increasing popularity of new energy vehicles, cockpit noise requirements are gradually increasing. The steering system's input shaft, connected to the steering wheel via a column, is susceptible to radial vibration if the input shaft lacks radial stiffness, leading to collisions with other components and noise. This noise can be transmitted to the driver's seat, potentially leading to complaints from OEMs and end customers.
[0004] In the existing sensor cover structure, the only part that can provide radial support is the shaft sealing ring. Although the input shaft and the shaft sealing ring are interference fit, the fitting position of the shaft sealing ring and the input shaft is made of rubber material and cannot provide good radial support for the input shaft, resulting in frequent abnormal noise problems due to insufficient radial stiffness of the input shaft.
[0005] To meet radial stiffness requirements, a metal bearing is required to mate with the input shaft. However, directly press-fitting the plastic sensor cover to the metal bearing can lead to risks such as sensor cover cracking and the metal bearing becoming loose after wear. Using a metal sensor cover to press-fit the metal bearing is also costly and inconsistent with lightweight design requirements.
[0006] Therefore, it is necessary to design a plastic sensor cover for the steering gear that can be assembled with a metal bearing, so as to suppress the radial shaking of the input shaft in a low-cost manner, thereby solving the abnormal noise problem caused by it, and at the same time avoid the risk of the metal bearing loosening during use and fracturing the sensor cover. Summary of the Invention
[0007] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a plastic sensor cover for a steering machine that can be assembled with a metal bearing. It adopts a low-cost method to suppress the radial shaking of the input shaft, thereby solving the abnormal noise problem caused by it, and at the same time avoids the risk of the metal bearing loosening during use and the risk of fracturing the sensor cover.
[0008] In order to achieve the above-mentioned purpose, the utility model is a plastic sensor cover for a steering gear that can be assembled with a metal bearing, comprising a metal ring and a plastic sensor cover body. The upper end of the inner hole of the plastic sensor cover body is provided with a shaft sealing ring mounting structure assembled with a shaft sealing ring and a metal bearing mounting structure connected to the metal ring. The shaft sealing ring mounting structure is located above the metal bearing mounting structure. The outer surface of the metal ring has a surface connection structure connected to the metal bearing mounting structure. The interior of the metal ring has a space for mounting a metal bearing.
[0009] The shaft sealing ring installation structure is an installation groove 1, and the inner diameter of the installation groove 1 matches the outer diameter of the shaft sealing ring.
[0010] The metal bearing mounting structure is a second mounting groove, the inner diameter of the second mounting groove matches the outer diameter of the metal ring, and the inner diameter of the metal ring matches the outer diameter of the metal bearing.
[0011] The metal ring and the metal bearing mounting structure of the plastic sensor cover body are connected by vulcanization, and the surface connection structure of the metal ring is a mesh knurling structure.
[0012] The bottom of the metal ring is provided with a circle of supporting platforms, and the supporting platforms abut against the lower surface edge of the metal bearing.
[0013] The outer side of the lower end of the plastic sensor cover body is provided with two circles of O-ring grooves.
[0014] The lower part of the plastic sensor cover body is provided with a mounting flange, and the mounting flange is provided with bolt holes.
[0015] Compared with the prior art, the utility model adds a metal ring inside the plastic sensor cover, thereby retaining the sealing function of the sensor cover. The metal ring provides support for the press-fitted metal bearing, thereby solving the abnormal noise problem caused by insufficient radial rigidity of the input shaft and avoiding the risk of the sensor cover being crushed. The knurled structure on the surface of the metal ring has an anti-rotation and anti-slip function, thereby avoiding the risk of the metal bearing loosening during long-term use. Compared with the technical solution of using a metal sensor cover, the utility model can save 2 / 3 of the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a cross-sectional view of the present utility model.
[0017] Figure 2 This is an axonometric drawing of the present invention.
[0018] Figure 3 It is an axonometric drawing of the metal ring of the present invention.
[0019] Figure 4 This is a cross-sectional view of the utility model after installation with the shaft sealing ring and the metal bearing. DETAILED DESCRIPTION
[0020] The present invention will now be further described with reference to the accompanying drawings.
[0021] See also Figure 1 、 Figure 2 The utility model is a plastic sensor cover for a steering gear that can be assembled with a metal bearing, comprising a metal ring and a plastic sensor cover body. The upper end of the inner hole of the plastic sensor cover body 1 is provided with a shaft sealing ring mounting structure 2 assembled with a shaft sealing ring 6 and a metal bearing mounting structure 3 connected with the metal ring 4. The shaft sealing ring mounting structure 2 is located above the metal bearing mounting structure 3. The outer surface of the metal ring 4 has a surface connection structure connected to the metal bearing mounting structure 3, and the interior of the metal ring 4 has a space for mounting a metal bearing 7.
[0022] The shaft sealing ring mounting structure 2 is a mounting groove 1, and the inner diameter of the mounting groove 1 matches the outer diameter of the shaft sealing ring 6.
[0023] The metal bearing mounting structure 3 is a second mounting groove, the inner diameter of the second mounting groove matches the outer diameter of the metal ring 4 , and the inner diameter of the metal ring 4 matches the outer diameter of the metal bearing 7 .
[0024] See also Figure 3 The metal ring 4 and the metal bearing mounting structure 3 of the plastic sensor cover body 1 are connected by vulcanization. The surface connection structure of the metal ring 4 is a mesh knurling structure 41. The mesh knurling structure 41 can ensure the vulcanization quality and further improve the connection strength between the metal ring 4 and the plastic sensor cover body 1.
[0025] The bottom of the metal ring 4 has a circle of support platforms 42 , which abut against the lower surface edge of the metal bearing 7 to provide support for the metal bearing 7 .
[0026] Two O-ring grooves 5 are provided on the outer side of the lower end of the plastic sensor cover body 1. After O-rings are assembled in the O-ring grooves 5, the sealing between the plastic sensor cover body 1 and the housing can be ensured.
[0027] The lower part of the plastic sensor cover body 1 is provided with a mounting flange, and the mounting flange is provided with bolt holes 8. After the connecting piece passes through the bolt holes 8, it is connected to the housing, thereby achieving the fixation of the plastic sensor cover body 1 and the housing.
[0028] See also Figure 4During assembly, the present invention first installs the metal bearing 7 within the metal ring 4. Because the metal bearing 7 and metal ring 4 are metal-to-metal, this effectively avoids the risk of plastic fracturing caused by directly press-fitting the metal bearing onto the plastic sensor cover body 1, as well as the risk of the metal bearing 7 loosening after wear. The shaft seal ring 6 is then assembled into the shaft seal ring mounting structure 2, and the O-ring is installed within the O-ring groove 5. After assembly, the shaft seal ring 6 and O-ring complete the sealing function of the plastic sensor cover body 1, while the metal bearing 7 provides radial support for the input shaft, preventing noise issues caused by large radial shake of the input shaft.
[0029] The utility model adds a metal ring inside the plastic sensor cover, retaining the sealing function of the sensor cover. The metal ring provides support for the press-fitted metal bearing, solving the problem of abnormal noise caused by insufficient radial rigidity of the input shaft, and also avoiding the risk of the sensor cover being crushed; the knurled structure on the surface of the metal ring has an anti-rotation and anti-slip function, avoiding the risk of the metal bearing loosening during long-term use; compared with the technical solution of using a metal sensor cover, the utility model can save 2 / 3 of the cost.
Claims
1. A plastic sensor cover for a steering gear that can be assembled with a metal bearing, comprising a metal ring and a plastic sensor cover body, characterized in that: The upper end of the inner hole of the plastic sensor cover body (1) is provided with a shaft sealing ring mounting structure (2) assembled with the shaft sealing ring (6) and a metal bearing mounting structure (3) connected with the metal ring (4); the shaft sealing ring mounting structure (2) is located above the metal bearing mounting structure (3); the outer surface of the metal ring (4) has a surface connection structure connected with the metal bearing mounting structure (3); and the interior of the metal ring (4) has a space for mounting the metal bearing (7).
2. The plastic sensor cover for a steering gear that can be assembled with a metal bearing according to claim 1, characterized in that: The shaft sealing ring installation structure (2) is a mounting groove 1, and the inner diameter of the mounting groove 1 matches the outer diameter of the shaft sealing ring (6).
3. The plastic sensor cover for a steering gear that can be assembled with a metal bearing according to claim 1, characterized in that: The metal bearing mounting structure (3) is a second mounting groove, the inner diameter of the second mounting groove matches the outer diameter of the metal ring (4), and the inner diameter of the metal ring (4) matches the outer diameter of the metal bearing (7).
4. The plastic sensor cover for a steering gear that can be assembled with a metal bearing according to claim 1, characterized in that: The metal ring (4) is connected to the metal bearing mounting structure (3) of the plastic sensor cover body (1) by vulcanization, and the surface connection structure of the metal ring (4) is a mesh knurling structure (41).
5. The plastic sensor cover for a steering gear that can be assembled with a metal bearing according to claim 1, characterized in that: The bottom of the metal ring (4) has a circle of support platforms (42), and the support platforms (42) are against the lower surface edge of the metal bearing (7).
6. The plastic sensor cover for a steering gear that can be assembled with a metal bearing according to claim 1, characterized in that: Two O-ring grooves (5) are provided on the outer side of the lower end of the plastic sensor cover body (1).
7. The plastic sensor cover for a steering gear that can be assembled with a metal bearing according to claim 1, characterized in that: The lower part of the plastic sensor cover body (1) is provided with a mounting flange, and the mounting flange is provided with bolt holes (8).