CN220185797U - Worm gear clearance self-adaptive compensation mechanism - Google Patents

Abstract

The utility model relates to the technical field of worm gears and worms and discloses a worm gear clearance self-adaptive compensation mechanism which comprises a shell, wherein a worm gear and a worm which are meshed with each other are arranged in the shell, the worm is rotationally connected with the shell, one end of the worm is rotationally provided with a first shaft sleeve, an elastic piece is arranged on the first shaft sleeve, a bolt is connected with the shell through threads and is perpendicular to the worm and is radially arranged along the worm, the bolt is connected with the elastic piece, and a guide piece is arranged between the first shaft sleeve and the shell. The utility model adaptively adjusts the meshing gap between the worm gears and ensures that the transmission performance of the worm gears is kept in a good state.

Description

Worm gear clearance self-adaptive compensation mechanism

Technical Field

The utility model relates to the technical field of worm gears and worms, in particular to a worm gear clearance self-adaptive compensation mechanism.

Background

An electric power steering system (EPS) uses electric drive as a power-assisted energy source for steering, and an electronic control unit controls the output torque of a motor, so that the power-assisted steering requirement of a vehicle is met. Compared with the traditional hydraulic power steering system, the EPS abandons a hydraulic element and replaces the hydraulic element with an electromechanical integrated digital servo system. Therefore, the EPS structure is simpler and lighter, flexible to assemble, energy-saving and environment-friendly, high in stability and popular with more and more vehicle manufacturers and drivers. The EPS can be classified into a column assist type, a pinion assist type, a rack assist type, and the like according to the difference of assist positions. Among the many types of EPS, a worm gear structure is mostly employed. The EPS utilizes the characteristics of speed reduction and torque increase of the worm gear structure, amplifies the torque output by the motor and transmits the torque to the steering shaft.

Because of the self material strength characteristics of the worm gear, friction during worm gear transmission is extremely easy to cause the expansion of the worm gear due to heating, and clamping stagnation occurs along with worm gear transmission, so that the hand feeling of a driver is influenced. Over time, the worm gear is often damaged by gluing, wear, etc., resulting in gaps between the worm gears. The gap between worm gears when engaged will cause steering abnormal sound, steering hysteresis and other phenomena, which seriously affect driving experience.

In order to solve the problems, a worm and gear clearance self-adaptive compensation mechanism is needed, so that stability in worm and gear transmission is guaranteed, and driving experience of a driver is enhanced.

Disclosure of Invention

The utility model aims to provide a worm and gear clearance self-adaptive compensation mechanism which has the effects of self-adaptively adjusting the meshing clearance between worm and gear and ensuring that the transmission performance of the worm and the gear is kept in a good state.

The technical aim of the utility model is realized by the following technical scheme: the utility model provides a worm gear clearance self-adaptation compensation mechanism, includes the shell, the inside worm wheel and the worm that are provided with intermeshing of shell, the worm rotates with the shell to be connected, the one end of worm rotates and is provided with axle sleeve one, be provided with the elastic component on the axle sleeve one, threaded connection has the bolt on the shell, the bolt perpendicular to worm and along the radial setting of worm, the bolt links to each other with the elastic component, be provided with the guide between axle sleeve one and the shell.

As a further arrangement of the utility model, the guide piece comprises a second shaft sleeve arranged on the outer side of the first shaft sleeve, the second shaft sleeve is fixedly connected with the shell, a guide groove is formed in the second shaft sleeve, a guide block is arranged on the first shaft sleeve, and the guide block is arranged in the guide groove in a sliding manner.

As a further arrangement of the utility model, the elastic member comprises a spring, one end of which is connected with the guide block and one end is connected with the bolt.

As a further arrangement of the utility model, the guide block is provided with a fixed rod, the end part of the bolt is provided with an axial mounting hole, one end of the spring is connected with the fixed rod, and the other end of the spring is arranged in the mounting hole.

The beneficial effects of the utility model are as follows:

1. the adaptability is strong. The screw rod and the spring of the structure provide a pretightening force for the worm, the meshing gap between the worm wheel and the worm is adaptively adjusted, and the transmission performance of the worm and the worm wheel is ensured to be always optimal.

2. The adaptability is strong. The structure adopts the bolt to control the pretightening force of the self-adaptive adjusting bracket, and can be adapted to various vehicle types and various worm and gear transmission structures.

3. Noise is avoided. The structure adopts two layers of bearing bushes, avoids the direct contact between the self-adaptive compensation bracket and the bearing, reduces the noise generated during the transmission of the worm and the gear, and simultaneously avoids the possible generation of new noise.

4. The production cost is low. The structure has the advantages of low material cost, simple processing and low selection requirement on the bearing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a schematic diagram showing the assembly positions of the compensation mechanism and the worm in the present embodiment;

FIG. 3 is a schematic diagram of the compensation mechanism of the present embodiment;

FIG. 4 is a schematic view of the structure of the first sleeve and the bolt according to the present embodiment;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a schematic view of a second structure of the shaft sleeve of the present embodiment;

in the figure, 1, a housing, 21, a worm wheel, 22, a worm, 3, a first sleeve, 4, an elastic member, 41, a spring, 5, a bolt, 51, an installation hole, 6, a guide member, 61, a second sleeve, 62, a guide groove, 63, a guide block, 64 and a fixing rod.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

Examples

The utility model provides a worm gear clearance self-adaptation compensation mechanism, includes shell 1, the inside worm wheel 21 and the worm 22 that are provided with intermeshing of shell 1, worm 22 rotates with shell 1 to be connected, the one end rotation of worm 22 is provided with axle sleeve one 3, be provided with elastic component 4 on the axle sleeve one 3, threaded connection has bolt 5 on the shell 1, bolt 5 perpendicular to worm 22 and along worm 22 radial setting, bolt 5 links to each other with elastic component 4, be provided with guide 6 between axle sleeve one 3 and the shell 1.

As a further arrangement of the present utility model, the guide member 6 includes a second sleeve 61 disposed outside the first sleeve 3, the second sleeve 61 is fixedly connected with the housing 1, a guide groove 62 is formed on the second sleeve 61, a guide block 63 is disposed on the first sleeve 3, and the guide block 63 is slidably disposed in the guide groove 62.

As a further arrangement of the utility model, the elastic member 4 comprises a spring 41, one end of the spring 41 being connected to the guide block 63 and one end being connected to the bolt 5.

As a further arrangement of the present utility model, the guide block 63 is provided with a fixing rod 64, the end of the bolt 5 is provided with an axial mounting hole 51, and one end of the spring 41 is connected to the fixing rod 64, and the other end is disposed in the mounting hole 51.

In a specific assembly process, the worm wheel 21 and the worm 22 are assembled in the shell, the spring 41 is installed on the guide block 63, the first shaft sleeve 3 is in interference fit with a bearing at one end of the worm 22, the second shaft sleeve 61 is assembled outside the first shaft sleeve 3, the interference fit is carried out in the shell, the guide block 63 is provided with two groups, the two groups of guide blocks 63 are slidably assembled in the guide groove 62, the bolt 5 is in threaded connection with the shell, and the bolt 5 contains the spring 41 in a hole at the end part.

After the assembly is completed, the bolt 5 compresses the spring 41 to give a pretightening force to the spring 41, when the worm 22 of the worm wheel 21 is in a clearance in the use process, the pretightening force of the spring 41 acts on the worm 22 to push the worm 22 to be continuously attached to the worm wheel 21, so that a good assembly effect is ensured, no clearance is generated, and noise generated between the worm 22 of the worm wheel 21 due to the clearance is avoided.

Claims (4)

1. A worm gear clearance self-adaptation compensating mechanism, its characterized in that: including shell (1), inside worm wheel (21) and the worm (22) that are provided with of shell (1), worm (22) rotate with shell (1) and are connected, the one end of worm (22) rotates and is provided with axle sleeve one (3), be provided with elastic component (4) on axle sleeve one (3), threaded connection has bolt (5) on shell (1), bolt (5) perpendicular to worm (22) and radially set up along worm (22), bolt (5) link to each other with elastic component (4), be provided with guide piece (6) between axle sleeve one (3) and the shell (1).

2. The worm gear backlash self-adaptive compensation mechanism according to claim 1, wherein: the guide piece (6) comprises a second shaft sleeve (61) arranged on the outer side of the first shaft sleeve (3), the second shaft sleeve (61) is fixedly connected with the shell (1), a guide groove (62) is formed in the second shaft sleeve (61), a guide block (63) is arranged on the first shaft sleeve (3), and the guide block (63) is slidably arranged in the guide groove (62).

3. The worm gear backlash self-adaptive compensation mechanism according to claim 2, wherein: the elastic piece (4) comprises a spring (41), one end of the spring (41) is connected with the guide block (63), and the other end of the spring is connected with the bolt (5).

4. A worm gear backlash adaptive compensation mechanism as set forth in claim 3, wherein: the guide block (63) is provided with a fixed rod (64), the end part of the bolt (5) is provided with an axial mounting hole (51), one end of the spring (41) is connected with the fixed rod (64), and the other end of the spring is arranged in the mounting hole (51).