Steering engine
By installing limit bearings and seals on the steering gear housing, the problem of poor steering gear limiting effect was solved, thereby improving the stability and comfort of the steering system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING JINKANG NEW ENERGY VEHICLE CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-08
AI Technical Summary
Existing steering gears have poor limiting effects under complex structures, which leads to the steering input shaft moving around, producing abnormal noise, and affecting driving comfort and safety.
A first limiting bearing is installed at the first opening of the steering gear housing, and combined with a limiting structure and a seal, to restrict the movement of the steering shaft assembly and enhance the smoothness and stability of the steering shaft assembly.
It effectively reduces steering gear noise, improves ride comfort and driving experience, and ensures the stability and durability of the steering system.
Smart Images
Figure CN224211125U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive steering technology, and in particular relates to a steering mechanism. Background Technology
[0002] With the upgrading of automotive experience consumption, people are paying more and more attention to the NVH (Noise, Vibration, and Harshness) performance of automobiles. Good NVH performance means that the vehicle can provide a low-noise interior environment for passengers during driving, thereby improving the comfort of driving and riding. As the daily travel tool for most people, vehicles are where passengers spend a lot of time and use them frequently. The comfort of driving and riding in a vehicle directly affects the physical health and psychological state of passengers. Therefore, reducing the noise in the vehicle's interior environment is receiving increasing attention.
[0003] Currently, due to the complex structure of the steering gear, the limiting effect on the steering input shaft is not ideal under existing assembly conditions. Therefore, when the vehicle is driving on potholes or other bumpy roads, the steering input shaft is prone to erratic movement. The road surface excitation to the tires is transmitted to the steering gear, creating a reverse impact. At the same time, due to the inertia of the steering wheel, the entire steering system experiences intermittent pressure pulse release processes. During the pressure release process, a "ticking" noise is emitted, which greatly affects the driving experience of passengers. This type of noise can also make passengers worry about driving safety. This problem urgently needs to be solved. Utility Model Content
[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a steering gear to solve the problems of poor steering gear matching, which leads to abnormal noise in the steering gear.
[0005] To achieve the above and other related objectives, this utility model provides a steering gear, comprising:
[0006] A steering gear housing having a first opening;
[0007] A steering shaft assembly, wherein the steering shaft assembly is disposed inside the steering gear housing, and one end of the steering shaft assembly extends through the first opening;
[0008] A first limiting bearing is sleeved on the steering shaft assembly and located at the first opening of the steering gear housing. The outer ring of the first limiting bearing abuts against the inner wall of the first opening of the steering gear housing.
[0009] Optionally, the inner wall of the steering gear housing is provided with a limiting structure for limiting the first limiting bearing.
[0010] Optionally, the limiting structure is a limiting protrusion, which protrudes along the thickness direction of the steering gear housing and is arranged around the inner wall of the steering gear housing.
[0011] Optionally, along the axial direction of the steering shaft assembly, a seal is provided on the side of the first limiting bearing near the first opening, the seal being used to seal the gap between the steering shaft assembly and the inner wall of the steering gear housing.
[0012] Optionally, the sealing element is a sealing ring, which is sleeved on the steering shaft assembly and is interference-fitted with both the steering gear housing and the steering shaft assembly.
[0013] Optionally, the steering shaft assembly includes a steering input shaft, a torsion bar, and a steering gear. The steering input shaft has a placement cavity along its axial direction. The torsion bar passes through the placement cavity along its axial direction. One end of the torsion bar in the placement cavity is connected to the steering input shaft, and the other end is connected to the steering gear. The steering gear and the steering input shaft are sequentially connected along their axial direction. A first limiting bearing is sleeved on the steering input shaft, and a second limiting bearing is sleeved on the steering gear. The outer ring of the second limiting bearing abuts against the inner wall of the steering gear housing.
[0014] Optionally, two third limiting bearings are sequentially sleeved along the axial direction of the torsion bar, and the outer rings of the two third limiting bearings abut against the cavity wall of the placement cavity.
[0015] Optionally, a sealing plug is provided at the first opening, the sealing plug being used to seal the gap between the steering gear housing and the steering input shaft.
[0016] Optionally, the steering gear housing is provided with a reinforcing structure near the first opening.
[0017] Optionally, the reinforcing structure is a reinforcing rib, and multiple reinforcing ribs are provided on both the inner and outer walls of the steering gear housing.
[0018] As described above, the steering gear of this utility model has the following beneficial effects:
[0019] By setting a first limiting bearing on the steering shaft assembly at the first opening of the steering gear housing, the steering shaft assembly can be limited at the first opening, preventing the steering shaft assembly from moving during vehicle operation. This reduces abnormal noise in the vehicle and improves the comfort of the driver and passengers. At the same time, setting the first limiting bearing can increase the smoothness of the steering shaft assembly when rotating axially around the first limiting bearing, thus improving the driver's driving experience. Attached Figure Description
[0020] Figure 1 This is a cross-sectional schematic diagram of the steering gear according to an embodiment of the present utility model;
[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0022] Figure 3 for Figure 1 Enlarged view of point B in the middle;
[0023] Figure 4 This is one of the structural schematic diagrams of the steering gear housing according to an embodiment of the present utility model;
[0024] Figure 5 This is a second schematic diagram of the structure of the steering gear housing according to an embodiment of the present utility model.
[0025] Labeling Explanation: 1. Steering input shaft; 2. Steering gear housing; 3. Housing cavity; 4. Torsion bar; 5. Third limit bearing; 6. Second limit bearing; 7. Steering gear; 8. Sealing ring; 9. Limiting protrusion; 10. First limit bearing; 11. Sealing plug; 12. Reinforcing rib. Detailed Implementation
[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0027] Please see Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0028] In order to describe this utility model in detail, the following is a specific description of a steering mechanism according to this utility model:
[0029] Please combine Figure 1 and Figure 2As shown, this utility model provides a steering gear, including a steering gear housing 2, a steering shaft assembly, and a first limiting bearing 10. The steering gear housing 2 has a first opening; the steering shaft assembly is disposed inside the steering gear housing 2, with one end of the steering shaft assembly extending through the first opening; the first limiting bearing 10 is sleeved on the steering shaft assembly and located at the first opening of the steering gear housing 2, with the outer ring of the first limiting bearing 10 abutting against the inner wall of the first opening of the steering gear housing 2. By providing a first limiting bearing sleeved on the steering shaft assembly at the first opening of the steering gear housing 2, the steering shaft assembly can be limited at the first opening, preventing the steering shaft assembly from shifting during vehicle operation, thereby reducing vehicle noise and improving the comfort of the driver and passengers. Simultaneously, the first limiting bearing 10 increases the smoothness of the steering shaft assembly's axial rotation around the first limiting bearing 10, enhancing the driver's driving experience.
[0030] In this embodiment, the first limiting bearing 10 is a needle roller bearing, which has the characteristics of small radial dimension, high load capacity, smooth operation, and low frictional resistance. The type of the first limiting bearing 10 can be adjusted according to actual usage requirements.
[0031] The steering gear housing 2 has a limiting structure on its inner wall for limiting the position of the first limiting bearing 10. By setting the limiting structure on the steering gear housing 2 to limit the position of the first limiting bearing 10, the uniformity of the assembly position of the first limiting bearing 10 in each steering gear can be improved in industrial assembly, and the installation position of the first limiting bearing 10 can be easily located.
[0032] The limiting structure is a limiting protrusion 9, which protrudes along the thickness direction of the steering gear housing 2 and is arranged around the inner wall of the steering gear housing 2. The limiting protrusion 9 has a good limiting effect and is easy to manufacture and process. In some embodiments, the limiting structure may be a limiting step or multiple protrusions spaced around the inner wall of the steering gear housing 2. The type of limiting structure can be adjusted according to actual usage needs.
[0033] Specifically, along the axial direction of the steering shaft assembly, a seal is provided on the side of the first limiting bearing 10 near the first opening. The seal is used to seal the gap between the steering shaft assembly and the inner wall of the steering gear housing 2. By providing the seal, impurities and dust from the external environment can be prevented from entering the first limiting bearing 10, thus preventing jamming during use and reducing the frequency of maintenance and replacement of the first limiting bearing 10. In this embodiment, the seal is a sealing ring 8, which is fitted onto the steering shaft assembly and has an interference fit with both the steering gear housing 2 and the steering shaft assembly. The sealing ring 8 is easy to assemble and has good sealing performance. By interfering with both the steering gear housing 2 and the steering shaft assembly, the sealing ring 8 prevents liquid from entering the steering gear housing 2 and corroding the internal parts of the steering gear, preventing damage to the internal parts due to corrosion, reducing the number of maintenance operations, and ensuring the stability of the steering gear during use.
[0034] like Figure 3 As shown, the steering shaft assembly includes a steering input shaft 1, a torsion bar 4, and a steering gear 7. The steering input shaft 1 has a placement cavity 3 along its axial direction. The torsion bar 4 passes through the placement cavity 3 along its axial direction. One end of the torsion bar 4 in the placement cavity 3 is connected to the steering input shaft 1, and the other end is connected to the steering gear 7. The steering gear 7 and the steering input shaft 1 are sequentially connected along their axial directions. A first limiting bearing 10 is sleeved on the steering input shaft 1, and a second limiting bearing 6 is sleeved on the steering gear 7. The outer ring of the second limiting bearing 6 abuts against the inner wall of the steering gear housing 2. By having the first limiting bearing 10 sleeved on the steering input shaft 1 and the second limiting bearing 6 sleeved on the steering gear 7, the limiting of the steering shaft assembly can be improved. In this embodiment, the torsion bar 4 and the steering input shaft 1 transmit torque via a spline. The second limiting bearing 6 is a sliding bearing, which features low noise, high load capacity, long life, and strong impact resistance. The type of the second limit bearing 6 can be adjusted according to actual needs.
[0035] In this embodiment, two third limiting bearings 5 are sequentially fitted along the axial direction of the torsion bar 4 at intervals, and the outer rings of both third limiting bearings 5 abut against the cavity wall of the placement cavity 3. By setting the third limiting bearings 5 on the torsion bar 4, the collision between the torsion bar 4 and the cavity wall of the placement cavity 3 can be avoided, thus preventing noise. In this embodiment, the third limiting bearings 5 are needle roller bearings, which have the characteristics of small radial dimension, high load-bearing capacity, smooth operation, and low frictional resistance.
[0036] like Figure 4 and Figure 5As shown, specifically, a reinforcing structure is provided near the first opening of the steering gear housing 2. This reinforcing structure increases the rigidity of the steering gear housing 2, ensuring good strength after the first limit bearing 10 is installed, and preventing damage due to excessive stress after the first limit bearing 10 is installed. The reinforcing structure consists of reinforcing ribs 12, with multiple reinforcing ribs 12 provided on both the inner and outer walls of the steering gear housing 2. The reinforcing ribs 12 provide good reinforcement and are easy to manufacture. In this embodiment, the reinforcing ribs 12 are arranged along the axial direction of the steering input shaft 1 on the inner and outer walls of the steering gear housing 2. In some embodiments, the rigidity of the steering gear housing 2 can also be changed by altering the material of the steering gear housing 2. In this embodiment, a sealing plug 11 is also provided at the first opening. The sealing plug 11 is used to seal the gap between the steering gear housing 2 and the steering input shaft 1, preventing external dust and debris from entering the steering gear housing 2 and affecting the operation of the parts inside.
[0037] In summary, by setting a first limiting bearing 10 fitted onto the steering shaft assembly at the first opening of the steering gear housing 2, the steering shaft assembly can be limited at the first opening, preventing the steering shaft assembly from moving around during vehicle operation. This reduces abnormal vehicle noise and improves the comfort of the driver and passengers. At the same time, setting the first limiting bearing 10 increases the smoothness of the steering shaft assembly when rotating axially around the first limiting bearing 10, enhancing the driver's driving experience.
[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A steering gear, characterized in that, include: A steering gear housing having a first opening; A steering shaft assembly, wherein the steering shaft assembly is disposed inside the steering gear housing, and one end of the steering shaft assembly extends through the first opening; A first limiting bearing is sleeved on the steering shaft assembly and located at the first opening of the steering gear housing. The outer ring of the first limiting bearing abuts against the inner wall of the first opening of the steering gear housing.
2. The steering gear according to claim 1, characterized in that: The inner wall of the steering gear housing is provided with a limiting structure for limiting the first limiting bearing.
3. The steering gear according to claim 2, characterized in that: The limiting structure is a limiting protrusion, which protrudes along the thickness direction of the steering gear housing and is arranged around the inner wall of the steering gear housing.
4. The steering gear according to any one of claims 1-3, characterized in that: Along the axial direction of the steering shaft assembly, a seal is provided on the side of the first limiting bearing near the first opening, the seal being used to seal the gap between the steering shaft assembly and the inner wall of the steering gear housing.
5. The steering gear according to claim 4, characterized in that: The sealing element is a sealing ring, which is sleeved on the steering shaft assembly and is interference-fitted with both the steering gear housing and the steering shaft assembly.
6. The steering gear according to any one of claims 1-3, characterized in that: The steering shaft assembly includes a steering input shaft, a torsion bar, and a steering gear. The steering input shaft has a cavity along its axial direction. The torsion bar passes through the cavity along its axial direction. One end of the torsion bar in the cavity is connected to the steering input shaft, and the other end is connected to the steering gear. The steering gear and the steering input shaft are sequentially connected along their axial direction. A first limiting bearing is sleeved on the steering input shaft, and a second limiting bearing is sleeved on the steering gear. The outer ring of the second limiting bearing abuts against the inner wall of the steering gear housing.
7. The steering gear according to claim 6, characterized in that: The torsion bar is fitted with two third limiting bearings at intervals along its axial direction, and the outer rings of the two third limiting bearings abut against the cavity wall of the placement cavity.
8. The steering gear according to claim 6, characterized in that: A sealing plug is provided at the first opening, and the sealing plug is used to seal the gap between the steering gear housing and the steering input shaft.
9. The steering gear according to any one of claims 1-3, characterized in that: The steering gear housing is provided with a reinforcing structure near the first opening.
10. The steering gear according to claim 9, characterized in that: The reinforcing structure is a reinforcing rib, and multiple reinforcing ribs are provided on both the inner and outer walls of the steering gear housing.