Steering sensor and vehicle comprising same
The clearance fit structure and laser welding connection solve the problems of steering sensor wear and noise in long-term use, improve the accuracy and durability of the sensor, simplify the installation process and reduce costs.
Patent Information
- Application Number
- CN202422957383.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Existing steering sensors have problems such as wear of the rotor and housing, noise generation, and high cost during long-term use, especially the wear risk caused by the increased gap and the complicated spring installation process.
A clearance fit structure is adopted, with the first ring plate in contact with the first upper surface, the outer cylinder in contact with the inner cylindrical surface, and the second ring plate in contact with the first lower surface, thereby increasing the contact area between the transmission assembly and the housing. The connection is achieved through laser welding, which reduces wear and improves precision and durability.
It effectively reduces the wear between the transmission component and the housing, improves the accuracy and durability of the sensor, reduces noise, simplifies the installation process, and reduces costs.
Smart Images
Figure CN223443622U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of steering sensor, especially a steering sensor and a vehicle comprising the same. BACKGROUND
[0002] The steering sensor is applied to an automobile EPS system and provides an angle signal and a torque signal for an automobile steering system. The steering sensor of a steering wheel is usually installed on a steering system, and the rotor needs to rotate in the use process, which will cause relative movement with the shell and generate friction. In the continuous use process, the gap between the rotor and the shell will become larger.
[0003] Since the gap will affect the accuracy of the sensor, it is crucial to avoid obvious wear between the rotor and the shell in the whole life cycle and ensure that the position between the rotor and the shell is relatively fixed to ensure the accuracy of the sensor.
[0004] At present, the commonly used sensor on the market adopts the structure as shown in the figure to ensure the relative position between the rotor and the shell, which comprises a shell 1', a rotor 2' and a spring 3'. This structure has the following disadvantages in the long-term use process:
[0005] 1. The rotor 2' and the shell 1' will have obvious wear, and the particles generated by wear will cause damage to the rotating system;
[0006] 2. The rotor 2' and the shell 1' will generate a large noise;
[0007] 3. This structure needs to use a spring 3', which needs a special process for the installation of the spring 3', so the cost of the product is high, and the installation is also complex.
[0008] Therefore, the utility model is developed and designed through in-depth thinking and active research and improvement of the deficiencies and inconvenience caused by the imperfect design of the existing sensor structure. UTILITY MODEL CONTENT
[0009] The utility model aims at overcoming the deficiency that the transmission system will have obvious wear and damage risk in the long-term use in the prior art, and provides a steering sensor and a vehicle comprising the same.
[0010] In order to achieve the above purpose, the solution of the utility model is:
[0011] A steering sensor comprising a shell and a transmission structure, the shell is provided with a shaft hole for installing the transmission structure, the inner wall of the shaft hole is convexly formed with an inner cylindrical surface, a first upper surface and a first lower surface;
[0012] The transmission structure is rotatably installed in the shaft hole and is in clearance fit with the shaft hole, and the transmission structure comprises a transmission gear and an inner rotor which are coaxially arranged and synchronously rotate;
[0013] The transmission gear is provided with a gear face outside, and a first ring plate which is in active fit with the first upper surface is extended from the lower part of the transmission gear;
[0014] The inner rotor comprises an inner cylinder and an outer cylinder which is nested in the inner cylinder, the top of the outer cylinder is lower than the top of the inner cylinder, a second ring plate which is in active fit with the first lower surface is extended from the lower part of the outer cylinder, and the transmission gear is sleeved on the inner cylinder and the first ring plate is installed on the outer cylinder.
[0015] Further, the lower end surface of the first ring plate is fixed to the top of the outer cylinder, and the edge of the first ring plate extends above the first upper surface and is in active abutment with the first upper surface.
[0016] Further, the fit clearance between the first ring plate and the first upper surface is within 0.5 mm.
[0017] Further, the first ring plate and the outer cylinder are connected with each other by laser welding.
[0018] Further, a plurality of through grooves which are vertically through the outer cylinder are formed in the middle part of the cylinder wall of the outer cylinder, and the first ring plate is covered on the through grooves.
[0019] Further, the shell is also provided with a material overflow prevention groove.
[0020] Further, the second ring plate extends below the first lower surface and is in active contact with the first lower surface; and the fit clearance between the second ring plate and the first lower surface is within 0.5 mm.
[0021] Further, the shell is provided with a friction face which is formed on the first lower surface, and the second ring plate is in contact and sliding with the friction face.
[0022] Further, the fit clearance between the outer cylinder and the inner cylindrical surface is within 0.5 mm.
[0023] In order to achieve the above purpose, the utility model also provides a vehicle, including a steering wheel, the steering wheel adopts the above any one turns to the sensor.
[0024] After the above structure, the steering sensor structure of the utility model adopts the clearance fit mode, through the contact of the first ring plate and the first upper surface, the contact of the outer cylinder and the inner cylindrical surface, and the contact of the second ring plate and the first lower surface, the contact area between the transmission assembly and the shell is increased, so as to reduce the abrasion between the transmission assembly and the shell, and improve the precision and durability of the sensor in the whole life cycle. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 Structure exploded view of preferred embodiment of the present application.
[0026] Figure 2 Sectional view of preferred embodiment of the present application.
[0027] Figure 3 Figure 2 Enlarged view of part A.
[0028] Figure 4 Stereogram of housing in preferred embodiment of the present application Figure 1 .
[0029] Figure 5 Stereogram of housing in preferred embodiment of the present application Figure 2 .
[0030] Figure 6 Stereogram of transmission gear in preferred embodiment of the present application.
[0031] Figure 7 Stereogram of inner rotor in preferred embodiment of the present application.
[0032] Figure 8 Assembly view of transmission gear and inner rotor in preferred embodiment of the present application.
[0033] Reference signs: 1, housing; 11, shaft hole; 12, inner cylindrical surface; 13, first upper surface; 14, first lower surface; 15, anti-overflowing groove; 2, transmission gear; 21, gear surface; 22, first ring plate; 221, second lower surface; 3, inner rotor; 31, inner cylinder; 32, outer cylinder; 321, outer cylindrical surface; 322, second upper surface; 323, through groove; 33, second ring plate; 331, third upper surface; a, first fit clearance; b, second fit clearance; c, third fit clearance. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below.
[0035] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0036] As Figures 1 to 8 shown, it is a preferred embodiment of the utility model of a steering sensor, including casing 1 and transmission structure, casing 1 is equipped with the axle hole 11 for installing transmission structure, the inner wall of axle hole 11 is formed with inner cylindrical surface 12, first upper surface 13 and first lower surface 14 by protruding;Transmission structure is rotatably installed in axle hole 11 and is in clearance fit with axle hole 11, and transmission structure includes transmission gear 2 and inner rotor 3 arranged coaxially, and transmission gear 2 and inner rotor 3 rotate synchronously;Transmission gear 2 outside is equipped with gear face 21, and transmission gear 2 lower part extends with the first ring plate 22 of first upper surface 13 movable cooperation;Inner rotor 3 includes inner cylinder 31 and outer cylinder 32 nested in inner cylinder 31, and the top of outer cylinder 32 is lower than the top of inner cylinder 31, and the lower part of outer cylinder 32 extends with the second ring plate 33 of first lower surface 14 movable cooperation, and transmission gear 2 is sleeved in inner cylinder 31 and first ring plate 22 is installed in outer cylinder 32.
[0037] In order to facilitate the description of the structure of the utility model in conjunction with the drawings, specifically, the upper end face and the lower end face of the protruding structure of the inner wall of axle hole 11 in the embodiment are first upper surface 13 and first lower surface 14 respectively, and the side between first upper surface 13 and first lower surface 14 and towards inner rotor 3 is inner cylindrical surface 12;The lower end face of first ring plate 22 is second lower surface 221;The face (i.e. upper end face) of outer cylinder 32 close to transmission gear 2 side is second upper surface 322, and the face (i.e. upper end face) of second ring plate 33 close to casing 1 side is third upper surface 331.
[0038] When working, transmission gear 2 and inner rotor 3 are rotatably installed in the axle hole 11 of casing 1, first upper surface 13, inner cylindrical surface 12 and first lower surface 14 are located between first ring plate 22 and second ring plate 33, first upper surface 13 is in clearance fit with second lower surface 221, inner cylindrical surface 12 is in clearance fit with outer cylindrical surface 321, and first lower surface 14 is in clearance fit with third upper surface 331.
[0039] The utility model discloses a steering sensor structure adopts the way of clearance fit, through the contact of first ring plate 22 and first upper surface 13, the contact of outer cylinder 32 and inner cylindrical surface 12, the contact of second ring plate 33 and first lower surface 14, increase the contact area between transmission assembly and shell 1, thereby reduce the wear and tear between transmission assembly and shell 1, improve the precision and durability of sensor in the whole life cycle.
[0040] The lower end surface of the first ring plate 22 is fixed to the top of the outer cylinder 32, and the edge of the first ring plate 22 extends above the first upper surface 13 and is in movable abutment with the first upper surface 13.
[0041] In this embodiment, the first ring plate 22 and the outer cylinder 32 are connected to each other by laser welding. Specifically, a plurality of through grooves 323 are formed in the middle of the cylinder wall of the outer cylinder 32, and the first ring plate 22 is arranged on the through grooves 323.
[0042] The shell 1 also has a material overflow prevention groove 15, which can avoid the influence of material overflow during laser welding on friction.
[0043] The gap size of the cooperation gap (i.e., the first cooperation gap a) between the first ring plate 22 and the first upper surface 13 in this embodiment is within 0.5 mm.
[0044] The second ring plate 33 extends below the first lower surface 14 and is in movable contact with the first lower surface 14.
[0045] In this embodiment, the gap size of the cooperation gap (i.e., the third cooperation gap c) between the second ring plate 33 and the first lower surface 14 is within 0.5 mm.
[0046] The shell 1 has a friction surface formed on the first lower surface 14, and the second ring plate 33 contacts and slides on the friction surface. Only the contact surface is machined during production, the precision is relatively high, the flatness is relatively good, the friction coefficient is lower, the friction during work is reduced, and the rotation is more stable.
[0047] In this embodiment, the gap size of the cooperation gap (i.e., the second cooperation gap b) between the outer cylinder 32 and the inner cylindrical surface 12 is within 0.5 mm.
[0048] The utility model also provides a vehicle, including steering wheel, and the steering wheel adopts the steering sensor described above.
[0049] The specific structure of the vehicle refers to the above embodiments. Since the vehicle adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0050] The principle and implementation mode of the present application are described in the specification by using specific examples, and the above examples are only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.
Claims
1. A steering sensor, characterized in that: The transmission structure comprises a housing and a transmission structure, wherein the housing is provided with an axial hole for mounting the transmission structure, and an inner wall of the axial hole is convexly formed with an inner cylindrical surface, a first upper surface and a first lower surface; The transmission structure is rotatably mounted in the shaft hole and is in clearance fit with the shaft hole. The transmission structure comprises a coaxially arranged transmission gear and an inner rotor, and the transmission gear and the inner rotor rotate synchronously. The transmission gear is provided with a gear surface on the outside, and a first ring plate extends from the lower part of the transmission gear and is movably engaged with the first upper surface; The inner rotor includes an inner cylinder and an outer cylinder nested in the inner cylinder. The top of the outer cylinder is lower than the top of the inner cylinder. A second ring plate extends from the lower part of the outer cylinder and movably cooperates with the first lower surface. The transmission gear is sleeved on the inner cylinder and the first ring plate is installed on the outer cylinder.
2. A steering sensor according to claim 1, characterized in that: The lower end surface of the first ring plate is fixed to the top of the outer cylinder, and the edge of the first ring plate extends above the first upper surface and movably abuts against the first upper surface.
3. A steering sensor according to claim 2, characterized in that: The fitting clearance between the first ring plate and the first upper surface is within 0.5 mm.
4. The steering sensor according to claim 2, characterized in that: The first ring plate and the outer cylinder are connected to each other by laser welding.
5. The steering sensor according to claim 3, characterized in that: A plurality of vertically penetrating through grooves are provided in the middle of the wall of the outer cylinder, and the first ring plate covers are arranged in the through grooves.
6. The steering sensor according to claim 3, characterized in that: The shell is also provided with an anti-overflow groove.
7. The steering sensor according to claim 1, characterized in that: The second ring plate extends below the first lower surface and is in movable contact with the first lower surface; and a fitting clearance between the second ring plate and the first lower surface is within 0.5 mm.
8. The steering sensor according to claim 7, characterized in that: The housing is provided with a friction surface formed on the first lower surface, and the second ring plate contacts and slides with the friction surface.
9. The steering sensor according to claim 1, characterized in that: The fitting clearance between the outer cylinder and the inner cylindrical surface is within 0.5 mm.
10. A vehicle comprising a steering wheel, characterized in that: The steering wheel adopts the steering sensor according to any one of claims 1 to 9.