Worm and gear steering device

Abstract

The utility model discloses a worm gear and worm steering device which comprises a shell, a worm gear, a worm, a gap adjusting assembly and a center adjusting assembly. The worm gear, the worm, the gap adjusting assembly and the center adjusting assembly are arranged in the shell. The worm gear is connected with the worm in a meshed mode, the gap adjusting assembly is arranged at one end of the worm, and the aligning assembly is arranged at the other end of the worm. According to the worm gear and worm steering device, the other end of the worm is automatically aligned through the aligning assembly, and the clearance of one end of the worm is adjusted through the clearance adjusting assembly, so that the worm gear and the worm are matched to reach the optimal position, and the device can be automatically adjusted to the optimal matching position after running-in; the worm and gear transmission efficiency is kept stable, and the service life of the device is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of electric steering devices, specifically to a worm gear steering device. Background Technology

[0002] Common worm gear structures generally operate within a specific center distance. The size of the center distance determines the clearance of the worm gear. When the center distance is too small, the operation of the parts will be sluggish. When the center distance is too large, the operating efficiency of the parts will be reduced. Both states will reduce the structural load-bearing capacity and shorten the service life of the structure.

[0003] The center distance of existing worm gear structures is fixed and cannot be adjusted, so it is necessary to design a worm gear structure with an adjustable center distance. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the aim is to provide a worm gear steering device.

[0005] The specific technical solution is as follows:

[0006] A worm gear steering device mainly includes: a housing and a worm wheel, a worm, a clearance adjustment assembly, and a self-aligning assembly installed in the housing;

[0007] The worm gear and the worm are meshed together. The clearance adjustment component is located at one end of the worm, and the self-aligning component is located at the other end of the worm.

[0008] The aforementioned worm gear steering device also has the following feature: the clearance adjustment assembly includes a slider, a clearance adjustment body, and an elastic element.

[0009] The slider is sleeved on one end of the worm gear, the clearance adjustment body is located inside the housing and sleeved on the slider, the slider has a protrusion on the side facing the worm gear, the protrusion is sleeved with the elastic element, and the elastic element is sandwiched between the slider and the clearance adjustment body.

[0010] The aforementioned worm gear steering device also features the following characteristic: the clearance adjustment assembly further includes a deep groove ball bearing, an inner sleeve, and an outer sleeve. A portion of the outer sleeve is installed within the clearance adjustment body, the deep groove ball bearing is installed inside the outer sleeve, and the inner sleeve is fitted onto one end of the worm and passes through the deep groove ball bearing.

[0011] The aforementioned worm gear steering device also has the following feature: the self-aligning assembly includes a self-aligning bearing, a coupling, a coupling sleeve, and a locking element.

[0012] The self-aligning bearing and the coupling are sequentially sleeved on the other end of the worm gear. The coupling is provided with a coupling sleeve inside. The other end of the worm gear is in contact with one end of the coupling sleeve. The coupling is wrapped with a locking member, which is installed inside the housing.

[0013] The aforementioned worm gear steering device also has the feature that the coupling abuts against the inner ring of the self-aligning bearing.

[0014] The aforementioned worm gear steering device also has the feature that the locking member abuts against the outer ring of the self-aligning bearing.

[0015] The aforementioned worm gear steering device also features a convex ring at the other end of the worm, with the self-aligning bearing abutting against the convex ring.

[0016] The aforementioned worm gear steering device also has the feature that the other end of the coupling sleeve is connected to an external motor.

[0017] The aforementioned worm gear steering device also features that the elastic element is a spring.

[0018] The aforementioned worm gear steering device also features a retaining ring at the end of the inner sleeve away from the slider, with the radial surface of the retaining ring abutting against the deep groove ball bearing.

[0019] The positive effects of the above technical solution are:

[0020] This utility model provides a worm gear steering device. The other end of the worm is automatically aligned via a self-aligning component, and the other end of the worm is adjusted via a gap adjustment component to ensure that the worm gear and worm are in the optimal position. After the device is broken in, it will automatically adjust to the optimal position, thus maintaining stable worm gear transmission efficiency and extending the service life of the device. Attached Figure Description

[0021] Figure 1 A structural schematic diagram of a worm gear steering device provided by this utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of a partial structure;

[0023] Figure 3 A schematic diagram of the gap adjustment component provided by this utility model.

[0024] In the attached diagram: 1. Housing; 2. Worm gear; 3. Worm; 301. Convex ring; 4. Slider; 401. Convex post; 5. Clearance adjusting body; 6. Spring; 7. Deep groove ball bearing; 8. Inner sleeve; 801. Retaining ring; 9. Outer sleeve; 11. Self-aligning bearing; 12. Coupling; 13. Coupling sleeve; 14. Nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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 this utility model 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 this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] Please see Figures 1 to 3 This utility model discloses a worm gear steering device, including: a housing 1 and a worm gear 2, a worm 3, a clearance adjustment assembly and a self-aligning assembly installed in the housing 1;

[0029] The worm gear 2 and the worm 3 are meshed together. The clearance adjustment component is located at one end of the worm 3, and the self-aligning component is located at the other end of the worm 3.

[0030] Specifically, the gap adjustment assembly includes a slider 4, a gap adjustment body 5, and an elastic element;

[0031] The slider 4 is sleeved on one end of the worm gear 3. The gap adjustment body 5 is located inside the housing 1 and sleeved on the slider 4. The slider 4 has a protrusion 401 on the side facing the worm wheel 2. The protrusion 401 is sleeved on the elastic element. The elastic element is sandwiched between the slider 4 and the gap adjustment body 5.

[0032] The slider 4 abuts against the inner wall of the housing 1 to achieve axial positioning of the slider 4.

[0033] Optionally, the elastic element can be a compression spring 6.

[0034] Optionally, an adjustment gap is provided between the slider 4 and the axial hole wall inside the housing 1.

[0035] Furthermore, the clearance adjustment assembly also includes a deep groove ball bearing 7, an inner sleeve 8, and an outer sleeve 9. A portion of the outer sleeve 9 is installed inside the clearance adjustment body 5, the deep groove ball bearing 7 is installed inside the outer sleeve 9, and the inner sleeve 8 is fitted onto one end of the worm gear 3 and passes through the deep groove ball bearing 7.

[0036] Optionally, in this embodiment, the gap adjustment body 5 has a stepped hole, which is divided into a first section and a second section. The diameter of the first section is smaller than that of the second section. The first section is close to the radial hole wall of the housing 1. The slider 4 is installed in the first section, and the outer sleeve 9 is installed in the second section. The outer sleeve 9 extends beyond the second section.

[0037] Optionally, a retaining ring 801 is provided at the end of the inner sleeve 8 away from the slider 4, and the radial surface of the retaining ring 801 abuts against the deep groove ball bearing 7 to achieve axial positioning of the deep groove ball bearing 7.

[0038] Specifically, the self-aligning assembly includes a self-aligning bearing 11, a coupling 12, a coupling sleeve 13, and a locking element;

[0039] The self-aligning bearing 11 and the coupling 12 are sequentially sleeved on the other end of the worm 3. The coupling 12 is provided with the coupling sleeve 13. The other end of the worm 3 is in contact with one end of the coupling sleeve 13. The coupling 12 is wrapped with the locking member, which is installed in the housing 1.

[0040] The coupling 12 abuts against the inner ring of the self-aligning bearing 11. The locking member abuts against the outer ring of the self-aligning bearing 11. Together, the coupling 12 and the locking member achieve axial positioning of the self-aligning bearing 11.

[0041] Optionally, a convex ring 301 is provided at the other end of the worm gear 3, and the self-aligning bearing 11 abuts against the convex ring 301 to achieve axial positioning of the self-aligning bearing 11.

[0042] The other end of the coupling sleeve 13 is connected to an external motor (not shown in the figure).

[0043] Optionally, the locking element is a nut 14, which has external threads on its outer side and internal threads on the inner wall of the housing 1. The outer side of the nut 14 is threadedly connected to the inner wall of the housing 1.

[0044] This utility model provides a worm gear steering device. The other end of the worm 3 achieves automatic self-alignment via a self-aligning component, while the other end of the worm 3 undergoes clearance adjustment via a clearance adjustment component. This ensures that the worm gear 2 and worm 3 are in the optimal position. After break-in, the device will automatically adjust to this optimal position, maintaining stable transmission efficiency between the worm gear 2 and worm 3 and extending the device's service life. Specifically, after the entire device is assembled, the self-aligning bearing 11 adjusts under external pressure. This adjustment causes the other end of the worm 3 to wobble. Simultaneously, this wobble applies pressure to an elastic element, such as a spring. The elastic element then self-adjusts, causing the other end of the worm 3 to wobble until all forces are balanced, and the worm 3 stops, achieving the optimal state.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A worm gear steering device, characterized in that, include: The housing and the worm gear, worm, clearance adjustment assembly and self-aligning assembly installed inside the housing; The worm gear and the worm are meshed together, the clearance adjustment component is disposed at one end of the worm, and the self-aligning component is disposed at the other end of the worm; The self-aligning assembly includes a self-aligning bearing, a coupling, a coupling sleeve, and a locking element; The self-aligning bearing and the coupling are sequentially sleeved on the other end of the worm gear. The coupling is provided with a coupling sleeve inside. The other end of the worm gear is in contact with one end of the coupling sleeve. The coupling is wrapped with a locking member, which is installed inside the housing.

2. The worm gear steering device according to claim 1, characterized in that, The gap adjustment assembly includes a slider, a gap adjustment body, and an elastic element; The slider is sleeved on one end of the worm gear, the clearance adjustment body is located inside the housing and sleeved on the slider, the slider has a protrusion on the side facing the worm gear, the protrusion is sleeved with the elastic element, and the elastic element is sandwiched between the slider and the clearance adjustment body.

3. The worm gear steering device according to claim 2, characterized in that, The clearance adjustment assembly further includes a deep groove ball bearing, an inner sleeve, and an outer sleeve. A portion of the outer sleeve is installed in the clearance adjustment body, the deep groove ball bearing is installed inside the outer sleeve, and the inner sleeve is fitted onto one end of the worm and passes through the deep groove ball bearing.

4. The worm gear steering device according to claim 3, characterized in that, The coupling abuts against the inner ring of the self-aligning bearing.

5. The worm gear steering device according to claim 4, characterized in that, The locking element abuts against the outer ring of the self-aligning bearing.

6. The worm gear steering device according to claim 5, characterized in that, The other end of the worm gear is provided with a convex ring, and the self-aligning bearing abuts against the convex ring.

7. The worm gear steering device according to claim 5, characterized in that, The other end of the coupling sleeve is connected to an external motor.

8. The worm gear steering device according to any one of claims 2 to 3, characterized in that, The elastic element is a spring.

9. The worm gear steering device according to claim 3, characterized in that, A retaining ring is provided at the end of the inner sleeve away from the slider, and the radial surface of the retaining ring abuts against the deep groove ball bearing.

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