Steering gear homing device

Abstract

The utility model discloses a steering gear homing device which comprises a sleeve, a rotating shaft and a steering reset assembly. The sleeve is fixed on a vehicle main body; one end of the rotating shaft penetrates through the sleeve, and the other end is connected with a steering wheel; the steering reset assembly comprises a first limiting structure arranged on the sleeve, a second limiting structure arranged on the rotating shaft and an elastic element connected between the first limiting structure and the second limiting structure. According to the steering gear homing device, one end of the rotating shaft penetrates through the sleeve, the other end of the rotating shaft is connected with the steering wheel, the second limiting structure is arranged on the rotating shaft, the first limiting structure is arranged in the sleeve, and the elastic element is connected between the first limiting structure and the second limiting structure. And after the steering wheel is loosened, the rotating shaft can be forced to rotate through the elastic force of the elastic element, so that the steering wheel is aligned.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical steering, in particular to a steering machine return device. Background Art

[0002] The steering gear is the vehicle's steering system, which is a device installed on the vehicle body to control the direction of the vehicle's travel. In the vehicle's steering system, EPS is usually used to achieve steering wheel return or special four-wheel alignment parameters allow the suspension system to generate force to return the steering wheel to a straight line to achieve return. In the steering system of agricultural machinery, EPS with active return function is usually not used due to cost considerations. However, if the return is achieved only by the return force generated by the suspension, a considerable amount of energy will be lost by the worm gear structure of the steering system, resulting in a reduction or even disappearance of the return force. Utility Model Content

[0003] In order to solve the above technical problems, the present invention provides a steering gear return device, the specific technical solution is as follows:

[0004] A steering gear homing device, comprising:

[0005] A sleeve, for fixing to a vehicle body;

[0006] a rotating shaft, one end of which passes through the sleeve and the other end of which is connected to the steering wheel;

[0007] The steering reset assembly includes a first limiting structure arranged on the sleeve, a second limiting structure arranged on the rotating shaft, and an elastic element connected between the first limiting structure and the second limiting structure.

[0008] Preferably,

[0009] The first limiting structure includes a first limiting portion and a second limiting portion arranged along the circumference of the sleeve;

[0010] The second limiting structure includes a first supporting portion and a second supporting portion arranged along the circumference of the rotating shaft, the first supporting portion is arranged opposite to the first limiting portion, and the second supporting portion is arranged opposite to the second limiting portion;

[0011] One end of the elastic element abuts against the first supporting portion and the first limiting portion, and the other end abuts against the second supporting portion and the second limiting portion.

[0012] Preferably, a first limiting groove is provided on the sleeve, and the first limiting portion and the second limiting portion are formed on both sides of the first limiting groove respectively.

[0013] Preferably, a sliding sleeve is provided on the fixed sleeve on the rotating shaft, a second limiting groove is provided on the sliding sleeve, and the first supporting portion and the second supporting portion are formed on both sides of the second limiting groove respectively.

[0014] Preferably, the elastic element is a torsion spring, and the torsion spring is sleeved on the rotating shaft.

[0015] Preferably, the rotating shaft and the sliding sleeve are fixed by a positioning pin.

[0016] Preferably, it also includes an angle sensor mounting seat arranged at the end of the sleeve.

[0017] Preferably, it further comprises a damper coaxially connected to the end of the rotating shaft, and the outer side of the damper is frictionally connected to the inner side of the sleeve.

[0018] The steering gear return device provided by the utility model is configured such that one end of a rotating shaft passes through a sleeve and the other end is connected to a steering wheel, and a second limiting structure is provided on the rotating shaft, a first limiting structure is provided in the sleeve, and an elastic element is connected between the first limiting structure and the second limiting structure, so that the elastic element can be pulled or pushed when the steering wheel is rotated, and after the steering wheel is released, the elastic force of the elastic element can force the rotating shaft to rotate, thereby returning the steering wheel to the normal position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of the steering gear return device provided in an embodiment of the utility model;

[0021] Figure 2 This is an exploded view of the structure of the steering gear homing device provided in the embodiment of the utility model;

[0022] Figure 3 for Figure 2 A partial enlarged view of part A;

[0023] Figure 4 A sectional side view of a steering gear return device provided in an embodiment of the present invention;

[0024] Figure 5 for Figure 4 A partial enlarged view of part B.

[0025] Reference numerals

[0026] 1-sleeve; 11-first limiting groove;

[0027] 2-rotating shaft; 21-sliding sleeve; 22-second limiting groove; 23-locating pin;

[0028] 3-steering reset assembly; 31-first limiting structure; 311-first limiting portion; 312-second limiting portion; 32-second limiting structure; 321-first supporting portion; 322-second supporting portion; 33-elastic element;

[0029] 4- Steering wheel;

[0030] 5-Angle sensor mounting bracket;

[0031] 6-Damper. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in the subsequent drawings.

[0034] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the utility model and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second," etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0036] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] See Figures 1 to 5 This embodiment provides a steering gear reset device, including a sleeve 1, a rotating shaft 2 and a steering reset assembly 3.

[0038] The sleeve 1 is used to be fixed on a vehicle body.

[0039] One end of the rotating shaft 2 passes through the sleeve 1 , and the other end is connected to the steering wheel 4 .

[0040] The steering reset assembly 3 includes a first limiting structure 31 provided on the sleeve 1 , a second limiting structure 32 provided on the rotating shaft 2 , and an elastic element 33 connected between the first limiting structure 31 and the second limiting structure 32 .

[0041] Among them, when the steering wheel 4 is in the forward state, the elastic element 33 is in a relaxed state and has no elastic force. When the steering wheel 4 is turned, the rotating shaft 2 rotates relative to the sleeve 1, and at the same time pulls or pushes the elastic element 33, so that the elastic element 33 has the elastic force to restore the initial state. The first limiting structure 31 and the second limiting structure 32 can limit the maximum rotation angle of the rotating shaft 2. When the steering wheel 4 is released, the elastic force of the elastic element 33 forces the rotating shaft 3 to rotate, thereby driving the steering wheel 4 back to the normal state.

[0042] The steering gear return device provided in this embodiment is configured such that one end of the rotating shaft 2 passes through the sleeve 1 and the other end is connected to the steering wheel 4, and a second limiting structure 32 is provided on the rotating shaft 2, a first limiting structure 31 is provided in the sleeve 1, and an elastic element 33 is connected between the first limiting structure 31 and the second limiting structure 32, so that the elastic element 33 can be pulled or pushed when the steering wheel 4 is rotated, and after the steering wheel 4 is released, the elastic force of the elastic element 33 can force the rotating shaft 2 to rotate so that the steering wheel 4 is returned to the normal position.

[0043] Further, see Figure 3 , in the examples provided in this embodiment:

[0044] The first limiting structure 31 includes a first limiting portion 311 and a second limiting portion 312 arranged along the circumference of the sleeve 1 .

[0045] The second limiting structure 32 includes a first supporting portion 321 and a second supporting portion 322 arranged along the circumference of the rotating shaft 2 . The first supporting portion 321 is arranged opposite to the first limiting portion 311 , and the second supporting portion 322 is arranged opposite to the second limiting portion 312 .

[0046] One end of the elastic element 33 abuts against the first supporting portion 321 and the first limiting portion 311 , and the other end abuts against the second supporting portion 322 and the second limiting portion 312 .

[0047] Specifically, the sleeve 1 and the rotating shaft 2 have the same axis, the first limiting portion 311 and the second limiting portion 312 are set at an angle relative to the axis, and the angle is recorded as α. The angle between the first support portion 321 and the second support portion 322 and the axis is equal to α. The first support portion 321 and the second support portion 322 can support both ends of the elastic element 33.

[0048] When the steering wheel is rotated clockwise, the first support portion 321 swings away from the first limit portion 311, one end of the elastic element 33 is blocked by the first limit portion 311, and the second support portion 322 swings toward the first limit portion 311, and pushes the other end of the elastic element 33 to swing synchronously, so that the two ends of the elastic element 33 are close to each other, causing the elastic element 33 to generate elastic force. When the steering wheel 4 is released, the two ends of the elastic element 33 push the first limit portion 311 and the second support portion 322, forcing the rotating shaft 2 to rotate in the opposite direction. When the two ends of the elastic element 33 swing to respectively abut the first support portion 321 and the second limit portion 312, the steering wheel 4 returns to the forward position; the same applies to the counterclockwise rotation of the steering wheel.

[0049] For further information, please see Figure 3 A first limiting groove 11 is provided on the sleeve 1 , and a first limiting portion 311 and a second limiting portion 312 are formed on both sides of the first limiting groove 11 .

[0050] Among them, the opening size of the first limiting groove 11 determines the swing angle size of the two ends of the elastic element 33, that is, the rotation angle of the steering wheel 4. The setting of the first limiting groove 11 not only facilitates the installation of parts, but also can limit the rotation of the rotating shaft 2.

[0051] For further information, please see Figure 3 A sliding sleeve 21 is fixedly provided on the rotating shaft 2 , a second limiting groove 22 is provided on the sliding sleeve 21 , and a first supporting portion 321 and a second supporting portion 322 are formed on both sides of the second limiting groove 22 .

[0052] Among them, the opening size of the second limit groove 22 can be consistent with the first limit groove 11. Since its opening size determines the rotation angle of the steering wheel 4, the opening size of the first limit groove 11 and the second limit groove 22 can be greater than 180°. In order to increase the rotation angle of the steering wheel 4, two groups of steering reset components 3 can be set. Specifically, the rotating shaft 2 can be divided into two upper and lower parts that are rotatably connected. One group of steering reset components 3 can be set between the upper rotating shaft and the lower rotating shaft, and another group of steering reset components 3 can be set between the lower rotating shaft and the sleeve 1. When the rotating shaft 2 rotates, the two groups of steering reset components 3 can increase the rotation angle of the upper rotating shaft. Similarly, three groups of steering reset components 3 can also be set, and the setting method is the same as above.

[0053] Furthermore, the elastic element 33 is a torsion spring, which is sleeved on the rotating shaft 2. When the rotating shaft 2 rotates, the first support portion 321 and the second limiting portion 312, or the second support portion 322 and the first limiting portion 311 can push the two ends of the torsion spring, so that the torsion spring has elastic force.

[0054] For further information, please see Figure 3 The rotating shaft 2 and the sliding sleeve 21 are fixed by the locating pin 23. The fixing method is: a locating pin hole is opened on the rotating shaft 2 and the sliding sleeve 21 along its radial direction. After the locating pin holes of the rotating shaft 2 and the sliding sleeve 21 are aligned, the locating pin 23 is inserted into the locating pin hole.

[0055] Furthermore, it also includes an angle sensor mounting seat 5 arranged at the end of the sleeve 1. When the rotating shaft 2 passes through the sleeve 1, its end can be close to or inserted into the angle sensor mounting seat 5. The angle sensor mounting seat 5 can be installed with an angle sensor to detect the rotation angle of the rotating shaft 2 and transmit it to the vehicle controller to help the driver steer.

[0056] Furthermore, it also includes a damper 6 coaxially connected to the end of the rotating shaft 2, and the outer side of the damper 6 is frictionally connected to the inner side of the sleeve 1, thereby providing steering damping and making the steering wheel 4 more stable.

[0057] See Figure 5 When installing the steering gear returner, the angle sensor mounting seat 5 and the damper 6 can be installed at the end of the sleeve 1, and the two can be fixed in the sleeve 1 by a wire lock ring. Two elastic retaining rings for holes can be installed in the sleeve 1, and two deep groove ball bearings can be installed in the sleeve 1 so that the outer rings of the two bearings respectively abut the two elastic retaining rings. Spacers, washers, etc. can also be set between the two bearings to limit the inner rings of the two bearings. Finally, a skeleton oil seal can be set at the other end of the sleeve 1.

[0058] Working principle:

[0059] When the steering wheel 4 is in the forward state, the elastic element 33 is in a relaxed state and has no elastic force. When the steering wheel 4 is turned, the rotating shaft 2 rotates relative to the sleeve 1, and at the same time pulls or pushes the elastic element 33, so that the elastic element 33 has the elastic force to restore the initial state. The first limiting structure 31 and the second limiting structure 32 can limit the maximum rotation angle of the rotating shaft 2. When the steering wheel 4 is released, the elastic force of the elastic element 33 forces the rotating shaft 3 to rotate, thereby driving the steering wheel 4 back to the normal state.

[0060] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0061] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the present utility model.

Claims

1. A steering gear return device, characterized in that: include: A sleeve (1) is used for fixing to a vehicle body; A rotating shaft (2), one end of which passes through the sleeve (1) and the other end of which is connected to a steering wheel (4); The steering reset assembly (3) comprises a first limiting structure (31) provided on the sleeve (1), a second limiting structure (32) provided on the rotating shaft (2), and an elastic element (33) connected between the first limiting structure (31) and the second limiting structure (32).

2. The steering gear return device according to claim 1, characterized in that: The first limiting structure (31) comprises a first limiting portion (311) and a second limiting portion (312) arranged along the circumference of the sleeve (1); The second limiting structure (32) comprises a first supporting portion (321) and a second supporting portion (322) arranged along the circumference of the rotating shaft (2), wherein the first supporting portion (321) is arranged relative to the first limiting portion (311), and the second supporting portion (322) is arranged relative to the second limiting portion (312); One end of the elastic element (33) abuts against the first supporting portion (321) and the first limiting portion (311), and the other end abuts against the second supporting portion (322) and the second limiting portion (312).

3. The steering gear return device according to claim 2, characterized in that: The sleeve (1) is provided with a first limiting groove (11), and the first limiting portion (311) and the second limiting portion (312) are respectively formed on both sides of the first limiting groove (11).

4. The steering gear return device according to claim 3, characterized in that: A sliding sleeve (21) is fixedly mounted on the rotating shaft (2), a second limiting groove (22) is provided on the sliding sleeve (21), and the first supporting portion (321) and the second supporting portion (322) are respectively formed on both sides of the second limiting groove (22).

5. The steering gear return device according to any one of claims 1 to 4, characterized in that: The elastic element (33) is a torsion spring, and the torsion spring is sleeved on the rotating shaft (2).

6. The steering gear return device according to claim 4, characterized in that: The rotating shaft (2) and the sliding sleeve (21) are fixed by a positioning pin (23).

7. The steering gear return device according to any one of claims 1 to 4, characterized in that: It also includes an angle sensor mounting seat (5) arranged at the end of the sleeve (1).

8. The steering gear return device according to claim 7, characterized in that: It also includes a damper (6) coaxially connected to the end of the rotating shaft (2), and the outer side of the damper (6) is frictionally connected to the inner side of the sleeve (1).

Images