CN210800014U

CN210800014U - Worm gear clearance self-adjusting device

Info

Publication number: CN210800014U
Application number: CN201921352760.3U
Authority: CN
Inventors: 朱胜峰; 任培; 姜凌坤; 王建雄; 朱兴旺
Original assignee: Hangzhou Shibao Auto Steering Gear Co ltd
Current assignee: Hangzhou Shibao Auto Steering Gear Co ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-06-19
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a worm gear clearance self-modulation device, including worm wheel main part and worm main part, the worm wheel main part with worm main part meshing transmission is connected, aligning bearing is installed to the one end of worm main part, compensating bearing is installed to the other end of worm main part, the plastics adjusting collar is installed to the compensating bearing top, the spring compensation piece is installed to the compensating bearing below, and this kind of worm gear clearance self-modulation device has the installation simply, and easy manufacturing is with low costs to after worm gear wearing and tearing, can automatic compensation wearing and tearing clearance, eliminate because the clearance between worm and the turbine arouses the noise and turn to sluggish problem.

Description

Worm gear clearance self-adjusting device

Technical Field

The utility model relates to an auto steering ware field specifically is a worm gear clearance self-modulation device.

Background

In order to effectively reduce the rotation speed of the motor, a worm gear is generally used as a primary speed reduction part of a speed reduction mechanism on an electric power steering for an automobile, and the worm gear plays a role of rapidly reducing the rotation speed of the motor. With the continuous progress of the technology, the requirements of the automobile driver on the driving comfort and low noise are higher and higher, and the worm gear is used as the primary part of the speed reducing mechanism, and the existence of the gap of the worm gear can cause the noise and steering delay, which can reduce the driving comfort of the driver.

In order to reduce the transmission clearance, the common practice in the industry is to adopt low interference fit when manufacturing the worm gear, so that the steering noise and the steering delay can be improved at the initial use stage of the steering gear, namely when a new vehicle runs, but after the vehicle runs for a certain distance, the worm gear is worn more and more along with the increase of the use times, the clearance is larger and larger, and the phenomena of large steering noise and delay can occur. Therefore, in order to overcome the defects of the prior art, the worm gear device with the gap self-adjusting function is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a worm gear clearance self-modulation device to the current worm gear clearance that provides in solving above-mentioned background art is unadjustable leads to arousing noise and the sluggish problem of turning to.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a worm gear clearance self-modulation device, includes worm wheel main part and worm main part, the worm wheel main part with worm main part meshing transmission is connected, self-aligning bearing is installed to the one end of worm main part, compensation bearing is installed to the other end of worm main part, the plastics adjusting collar is installed to compensation bearing top, the spring compensation piece is installed to compensation bearing below.

Preferably, the self-aligning bearing is rotatable about a central axis.

Preferably, the spring compensation sheet has a sector shape and a V-shaped cross section.

Preferably, the plastic adjusting ring comprises a plastic outer ring and a metal inner ring, and the metal inner ring is wrapped inside the plastic outer ring.

Preferably, the plastic outer ring is of a hollow structure.

Compared with the prior art, the beneficial effects of the utility model are that:

the worm and gear clearance self-adjusting device has the characteristics of simple installation, easy manufacture and low cost, and can automatically compensate the abrasion clearance after the worm and gear are abraded, thereby eliminating the problems of noise and steering delay caused by the clearance between the worm and the turbine.

Drawings

Fig. 1 is a front view of a worm and gear clearance self-adjusting device of the present invention;

fig. 2 is a schematic structural view of a self-aligning bearing of the worm and gear clearance self-adjusting device of the present invention;

fig. 3 is a schematic structural view of the spring compensation plate of the worm and gear clearance self-adjusting device of the present invention in an expanded state;

fig. 4 is a schematic structural view of a spring compensation plate of the worm and gear clearance self-adjusting device according to the present invention in a folded state;

fig. 5 is a schematic structural view of a plastic adjusting ring of the worm and gear clearance self-adjusting device of the present invention.

In the figure: 1. a worm gear body; 2. a self-aligning bearing; 3. a worm body; 4. a spring compensation plate; 5. a compensating bearing; 6. a plastic adjusting ring; 601. a plastic outer ring; 602. and (4) a metal inner ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, a worm and gear clearance self-adjusting device comprises a worm wheel main body 1 and a worm main body 3, wherein the worm wheel main body 1 is in meshed transmission connection with the worm main body 3, a self-aligning bearing 2 is installed at one end of the worm main body 3, a compensating bearing 5 is installed at the other end of the worm main body 3, a plastic adjusting ring 6 is installed above the compensating bearing 5, and a spring compensating plate 4 is installed below the compensating bearing 5.

Specifically, the self-aligning bearing 2 can rotate around the central shaft, and the arrangement is convenient for the assembly and the forming of the device.

Specifically, the spring compensation sheet 4 is sector in appearance shape, and the section of the spring compensation sheet is V-shaped, so that the spring compensation sheet 4 can elastically deform when being acted by force, and elasticity is provided for automatic gap adjustment.

Specifically, the plastic adjusting ring 6 includes a plastic outer ring 601 and a metal inner ring 602, and the metal inner ring 602 is wrapped inside the plastic outer ring 601.

Specifically, the plastic outer ring 601 is of a hollow structure, so that the plastic outer ring 601 can be extruded and deformed when being stressed, the plastic outer ring 601 and the metal inner ring 602 can generate relative displacement, the worm main body 3 rotates around the center of the self-aligning bearing 2 by a certain rotation angle, the larger the rotation angle value is, the smaller the gap between the worm wheel main body 1 and the worm main body 3 is, after the worm wheel main body 1 and the worm main body 3 are abraded, the spring compensation piece 4 continues to release elasticity, the rotation angle of the worm main body 3 rotating around the center of the self-aligning bearing 2 is increased, and the gap caused by abrasion is eliminated.

The working principle is as follows: the clearance between the worm wheel main body 1 and the worm main body 3 can be enlarged or reduced by adjusting the center distance between the worm wheel main body 1 and the worm main body 3, when the size is not changed, the center distance between the worm wheel main body 1 and the worm main body 3 can be reduced, the center-adjusting bearing 2 is arranged at one fixed end of the worm main body 3, the center-adjusting bearing 2 can rotate around the center line of the center, the spring compensation sheet 4 and the plastic adjustment ring 6 are arranged at the other end of the worm main body 3, as shown in the attached worm main body 3, the spring compensation sheet 4 adopts a V-shaped section design, can contract and deform when being stressed, can provide elasticity for automatic clearance adjustment, the plastic outer ring 601 adopts a hollow structure, can extrude and deform when being stressed, the plastic outer ring 601 and the metal inner ring 602 can generate relative displacement, when parts are assembled, the spring compensation sheet 4 is in a compressed state, and the spring compensation sheet 4 releases elasticity after being assembled, the metal inner ring 602 of the plastic adjusting ring 6 is extruded to enable the plastic outer ring 601 of the plastic adjusting ring 6 to generate elastic deformation, and the plastic outer ring 601 and the metal inner ring 602 generate relative displacement, so that the worm main body 3 rotates around the center of the self-aligning bearing 2 for a certain rotation angle, the larger the rotation angle value is, the smaller the gap between the worm wheel main body 1 and the worm main body 3 is, after the worm wheel main body 1 and the worm main body 3 are abraded, the spring compensation sheet 4 continues to release elasticity, the rotation angle of the worm main body 3 around the center of the self-aligning bearing 2 is increased, and the gap caused by abrasion is eliminated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A worm gear clearance self-modulation device which characterized in that: including worm wheel main part (1) and worm main part (3), worm wheel main part (1) with worm main part (3) meshing transmission is connected, self-aligning bearing (2) are installed to the one end of worm main part (3), compensation bearing (5) are installed to the other end of worm main part (3), plastics adjusting collar (6) are installed to compensation bearing (5) top, spring compensation piece (4) are installed to compensation bearing (5) below.

2. The clearance self-adjusting device for the worm and gear according to claim 1, characterized in that: the self-aligning bearing (2) can rotate around a central shaft.

3. The clearance self-adjusting device for the worm and gear according to claim 1, characterized in that: the spring compensation sheet (4) is sector in appearance shape, and the cross section is V-shaped.

4. The clearance self-adjusting device for the worm and gear according to claim 1, characterized in that: the plastic adjusting ring (6) comprises a plastic outer ring (601) and a metal inner ring (602), and the metal inner ring (602) is wrapped inside the plastic outer ring (601).

5. The clearance self-adjusting device for the worm and gear according to claim 4, characterized in that: the plastic outer ring (601) is of a hollow structure.