A steering gear rack pressing mechanism, a steering gear and a vehicle

Abstract

The present application relates to a kind of steering gear rack pressing block mechanism, steering gear and vehicle, steering gear rack pressing block mechanism is arranged in steering gear housing, and it includes: support seat, first end is close to rack and the second end is fixed to the screw plug on steering gear housing;And support seat elastic piece, it is elastically and telescopically arranged in the first end of support seat, and it is against rack. Therefore, the steering gear rack pressing block mechanism according to the embodiment of the present application not only can solve the problem that the compensation effect gradually decreases, the rack gap of steering gear is increasingly increased after steering gear long time work, but also can reduce noise, and improve the comfort of driver when driving vehicle;In addition, compared with prior art, the steering gear rack pressing block mechanism according to the embodiment of the present application is simple in structure, and can reduce cost.

Description

Technical Field

[0001] This invention relates to the field of vehicle steering technology, and more particularly to a steering rack and pinion mechanism, a steering gear, and a vehicle. Specifically, it relates to a steering rack and pinion mechanism, a steering gear, and a vehicle that is simple in structure, facilitates noise control, and saves costs. Background Technology

[0002] The steering gear helps the driver reduce the effort required to steer when operating the steering wheel, making driving easier and more convenient.

[0003] The working principle of the steering gear is as follows: when the driver applies torque to the steering wheel, the torque is transmitted to the steering gear gear through the steering column, and applies a force to the steering gear rack that meshes with it, so that the steering gear rack moves in a straight line and drives the steering tie rod. Finally, the tie rod drives the wheel hub to rotate, realizing the deflection of the tire.

[0004] However, due to factors such as actual machining precision, assembly, and wear after prolonged use, rack backlash usually occurs. Currently, in order to adjust the rack backlash of the steering gear, a rack backlash compensation mechanism is installed on the steering gear.

[0005] like Figure 1 As shown, the existing steering gear rack clamping mechanism is mounted on the steering gear housing 11, and a helical spring 13 is provided at one end of the support base 12 to provide preload. The other end of the helical spring 13 is connected to a screw plug. When the locking nut at the end of the screw plug is tightened, the gear backlash of the steering gear is fixed. When the locking nut is loosened and the screw plug is adjusted, the screw plug compresses the helical spring 13, and the helical spring 13 compensates for the rack backlash by pressing the rack 14 through the support base 12.

[0006] However, since the coil spring does not have a strict limit, it may sometimes be displaced. Furthermore, the existing steering rack and pinion mechanism that provides preload gradually loses its compensation effect after the steering gear has been in operation for a long time. The rack clearance of the steering gear increases, which in turn produces abnormal noise. This not only affects the performance of the steering gear, but also affects the driver's comfort when driving the vehicle. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] The first objective of this invention is to provide a steering gear rack pressure block mechanism to solve the problems of unsatisfactory backlash compensation effect, noise, and high cost of existing steering gear rack pressure block mechanisms.

[0009] The second objective of this invention is to provide a steering gear and vehicle including the above-mentioned steering gear rack pressure block mechanism, so as to solve the problems that the existing steering gear rack pressure block mechanism has unsatisfactory clearance compensation effect, and is not conducive to noise and high cost.

[0010] (II) Technical Solution

[0011] To solve the above-mentioned technical problems, on the one hand, the present invention provides a steering gear rack pressing block mechanism, which is disposed in the steering gear housing. The steering gear rack pressing block mechanism includes: a support base, a first end close to the rack and a second end fixed to the steering gear housing, and an elastic member of the support base, which is elastically and telescopically disposed at the first end of the support base and abuts against the rack.

[0012] Optionally, the end face of the first end is recessed to form a first curved surface, and a setting portion for setting the elastic member of the support seat is formed at the center of the first curved surface.

[0013] Optionally, the setting part is formed perpendicular to the end face of the second end from the center of the end face of the first end.

[0014] Optionally, the support elastic member includes: a support elastic portion formed inside the first curved surface as a second curved surface that bends toward the first end, and the support elastic portion is elastically deformable; and a movable portion extending from the surface center of the support elastic portion toward the first end and moving within the setting portion.

[0015] Optionally, the radius of curvature of the second surface under no-force conditions is greater than the radius of curvature of the first surface, and the moving part is located at the first position in the setting part.

[0016] Optionally, the second curved surface fits against the first curved surface under stress, and the moving part is located in a second position in the setting part, wherein the second position is deeper than the first position.

[0017] Optionally, the length of the moving part is shorter than the depth of the setting part.

[0018] On the other hand, the present invention also provides a steering gear, including the aforementioned steering gear rack pressure block mechanism.

[0019] In another aspect, the present invention also provides a vehicle including the aforementioned steering gear rack pressure block mechanism.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention has the following advantages: The present invention provides a steering gear rack clamping mechanism, disposed in the steering gear housing. The steering gear rack clamping mechanism includes: a support seat, a first end close to the rack and a second end fixed to the steering gear housing with a screw plug; and an elastic member of the support seat, elastically and telescopically disposed at the first end of the support seat and abutting against the rack. Therefore, the steering gear rack clamping mechanism according to the embodiments of the present invention can not only solve the problem of the gradual decrease in compensation effect and the increasing rack clearance after prolonged operation of the steering gear, but also reduce noise and improve driver comfort. Furthermore, compared with the prior art, the steering gear rack clamping mechanism according to the embodiments of the present invention has a simple structure and can reduce costs. Attached Figure Description

[0022] The above and other objects, features and other advantages of the present invention will become more clearly understood from the following detailed description, taken in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram showing the structure of a steering gear rack and pinion block mechanism according to the prior art;

[0024] Figure 2 This is a schematic diagram illustrating the structure of the steering gear rack pressure block mechanism according to an embodiment of the present invention;

[0025] Figure 3 This is a perspective view showing the steering gear rack pressure block mechanism according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram illustrating the steering rack and pinion mechanism under no-force conditions according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram illustrating the steering gear rack pressure block mechanism under stress according to an embodiment of the present invention;

[0028] In the diagram: 11: Housing; 12, 21: Support base; 13: Helical spring; 14, 24: Rack; 210: Setting part; 22: Elastic element of support base; 221: Elastic part of support base; 222: Moving part; 31: First curved surface; 32: Second curved surface; 41: First position; 42: Second position. Detailed Implementation

[0029] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Furthermore, in the description of this invention, unless otherwise stated, "multiple", "multiple roots", and "multiple groups" mean two or more.

[0033] Figure 2 This is a schematic diagram illustrating the structure of the steering gear rack pressure block mechanism according to an embodiment of the present invention; Figure 3 This is a perspective view showing the steering gear rack pressure block mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the steering rack and pinion mechanism under no-force conditions according to an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the steering rack and pinion mechanism under stress according to an embodiment of the present invention.

[0034] According to an embodiment of the present invention, a steering rack 24 pressing mechanism is provided. The mechanism is disposed in a steering gear housing and may include: a support base with a first end close to the rack 24 and a second end fixed to the steering gear housing; and a support base elastic member 22, which is elastically and telescopically disposed at the first end of the support base and abuts against the rack 24.

[0035] Specifically, refer to Figure 2 and Figure 3 The steering rack 24 pressure block mechanism is disposed in the steering gear housing, and one end of the support seat of the steering rack 24 pressure block mechanism, namely the first end, is located near the rack 24; the other end of the support seat, namely the second end, is connected to the screw plug.

[0036] The second end can be fixedly connected to the screw plug, and the end face of the first end can be recessed towards the second end to form a first curved surface 31. A setting part 210 for setting the support seat elastic member 22 can be formed at the center of the first curved surface 31. The setting part 210 can extend vertically from the center of the first curved surface 31 through the interior of the support seat to the end face of the second end.

[0037] Furthermore, compared to the prior art, the steering rack 24 pressure block mechanism according to an embodiment of the present invention uses a support seat elastic member 22 instead of a coil spring to obtain elastic potential energy for compensating for clearance. The support seat elastic member 22 is elastically and telescopically disposed at the first end of the support seat so as to provide elastic force to the rack 24.

[0038] Specifically, the support base elastic element 22 may include a support base elastic portion 221 and a moving portion 222. The support base elastic portion 221 is formed of an elastically deformable material, located inside the first curved surface 31, and bent to form a second curved surface 32. In the initial state, i.e., the state without force, such as... Figure 4 As shown, the radius of curvature of the second curved surface 32 is greater than that of the first curved surface 31, so that the two ends of the support elastic part 221 can abut against the first curved surface 31 and form a gap between the first curved surface 31 and the support elastic part 221; the moving part 222 extends from the surface center of the support elastic part 221 toward the first end and is provided in the setting part 210. The setting part 210 is formed as the moving channel of the moving part 222, and the length of the moving part 222 can be shorter than the depth of the setting part 210.

[0039] like Figure 4 and Figure 5 As shown, when the steering rack 24 pressure block mechanism according to an embodiment of the present invention is in the initial state, that is, in the unforced state, since the radius of curvature of the second curved surface 32 is greater than the radius of curvature of the first curved surface 31, the two ends of the support seat elastic part 221 are located inside the first curved surface 31 and form a gap with the first curved surface 31. The moving part 222 is partially located in the setting part 210, and the remaining part is located in the gap formed between the support seat elastic part 221 and the first curved surface 31. At this time, the moving part 222 is located in the first position 41 in the setting part 210.

[0040] When the steering rack 24 pressure block mechanism according to an embodiment of the present invention is under stress, that is, when it begins to contact the rack 24, the support seat elastic part 221 gradually deforms and moves toward the first curved surface 31. Finally, the second curved surface 32 is completely fitted with the shape of the first curved surface 31, and the moving part 222 is also completely built into the setting part 210. At this time, the moving part 222 is located in the second position 42 in the setting part 210.

[0041] That is, from the initial state to the final state of the steering rack 24 pressure block mechanism, the support seat elastic part 221 gradually deforms due to the influence of the rack 24, eventually making the second curved surface 32 completely fit with the first curved surface 31, and the moving part 222 also gradually moves from the first position 41 to the second position 42, and is finally completely placed in the setting part 210.

[0042] With the above structure, when wear and increased clearance occur between the rack and gear shaft due to prolonged use of the steering gear, the elastic potential energy of the support seat elastic part can achieve a good clearance compensation effect. Furthermore, the steering gear rack pressure block mechanism according to the present invention has a simple structure, is conducive to noise control, and its manufacturing cost is relatively low.

[0043] On the other hand, the present invention also provides a steering gear, including a steering gear rack pressure block mechanism according to an embodiment of the present invention, so as to effectively compensate for the backlash of the steering gear rack while reducing noise and saving costs.

[0044] Furthermore, the present invention also provides a vehicle including a steering rack pressure block mechanism according to an embodiment of the present invention, which can effectively compensate for steering rack backlash while also reducing noise and saving costs.

[0045] Compared with the prior art, the present invention has the following advantages: The present invention provides a steering gear rack clamping mechanism, disposed in the steering gear housing. The steering gear rack clamping mechanism includes: a support seat, a first end close to the rack and a second end fixed to the steering gear housing with a screw plug; and an elastic member of the support seat, elastically and telescopically disposed at the first end of the support seat and abutting against the rack. Therefore, the steering gear rack clamping mechanism according to the embodiments of the present invention can not only solve the problem of the gradual decrease in compensation effect and the increasing rack clearance after prolonged operation of the steering gear, but also reduce noise and improve driver comfort. Furthermore, compared with the prior art, the steering gear rack clamping mechanism according to the embodiments of the present invention has a simple structure and can reduce costs.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steering gear rack pressure block mechanism, disposed in a steering gear housing, characterized in that: The steering gear rack pressure block mechanism includes: Support base, a screw plug with one end close to the rack and the other end fixed to the steering gear housing; and The support seat elastic element is elastically and telescopically disposed at the first end of the support seat and abuts against the rack; Wherein, the end face of the first end is recessed to form a first curved surface, and a setting part for setting the elastic member of the support seat is formed at the center of the first curved surface; The support base elastic element includes: The support seat elastic portion is formed inside the first curved surface as a second curved surface that bends toward the first end, and the support seat elastic portion is elastically deformable; and A movable part is formed extending from the center of the surface of the elastic part of the support base toward the first end, and moves within the setting part; The radius of curvature of the second surface under no-force conditions is greater than the radius of curvature of the first surface.

2. The steering gear rack pressure block mechanism according to claim 1, characterized in that: The setting part is formed perpendicular to the end face of the second end from the center of the end face of the first end.

3. The steering gear rack pressure block mechanism according to claim 2, characterized in that: When the second curved surface is not subjected to force, the moving part is located in the first position of the setting part.

4. The steering gear rack pressure block mechanism according to claim 3, characterized in that: The second curved surface fits into the first curved surface under stress, and the moving part is located at a second position in the setting part, wherein the second position is deeper than the first position.

5. The steering gear rack pressure block mechanism according to claim 4, characterized in that: The length of the moving part is shorter than the depth of the setting part.

6. A steering gear, characterized in that: Includes the steering rack and pinion mechanism according to any one of claims 1-5.

7. A vehicle, characterized in that: Includes the steering rack and pinion mechanism according to any one of claims 1-5.

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