CN207809504U - A kind of novel worm screw fixed structure for electric booster steering device - Google Patents

Abstract

The utility model relates to a novel worm fixing structure for an electric power steering device, which comprises a worm gear housing and a worm housing. The worm housing is arranged on the top of the worm gear housing. A worm is installed in the worm housing, and the outer periphery of the worm gear is provided with worm gear teeth. The middle part of the worm is provided with threads. bearing, and the right bearing is installed on the worm near the right end, the right side of the right bearing is provided with a first screw plug, the worm housing is provided with a left bearing, and the left bearing is installed on the worm near the left end , an O-shaped rubber ring is provided between the left bearing and the worm, and a second screw plug is provided on the left side of the left bearing. The overall structure effectively reduces the axial movement of the worm during operation and improves the meshing of the worm and gear. Noise and noise due to backlash when reversing.

Description

A New Worm Fixing Structure for Electric Power Steering

technical field

The utility model relates to a novel worm fixing structure for an electric power steering gear, which belongs to the field of auto parts.

Background technique

Electric Power Steering (EPS) is a power steering system that directly relies on the motor to provide auxiliary torque. Compared with the traditional hydraulic power steering system HPS (Hydraulic PowerSteering), the EPS system has many advantages. EPS is mainly composed of torque sensor, vehicle speed sensor, motor, deceleration mechanism and electronic control unit (ECU). The existing electric power steering uses a floating worm. The buffers at both ends of the bearing absorb the axial movement of the worm. The cost of this design is relatively high, the structure of the buffer is complex, and the development is difficult, and because the worm moves left and right, it cannot be used in a brushed motor steering assist system.

Utility model content

The technical problem to be solved by the utility model overcomes the existing defects, and provides a new type of worm fixing structure for electric power steering, which effectively reduces the axial movement of the worm during operation, and improves the meshing noise and noise of the worm gear and worm. The noise caused by the gap during commutation can effectively solve the problems in the background technology.

In order to solve the above technical problems, the utility model provides the following technical solutions:

A novel worm fixing structure for electric power steering, comprising a worm gear housing and a worm housing, the worm housing is arranged on the top of the worm gear housing, a worm gear is installed inside the worm gear housing, and A worm is installed, the periphery of the worm gear is provided with worm gear teeth, the middle of the worm is provided with threads, the worm gear and the worm are connected through worm gear teeth and thread meshing transmission, the worm housing is provided with a right bearing, and the The right bearing is installed on the worm near the right end, the right side of the right bearing is provided with a first screw plug, the worm housing is provided with a left bearing, and the left bearing is installed on the worm near the left end, the left An O-shaped rubber ring is arranged between the bearing and the worm, and a second screw plug is arranged on the left side of the left bearing.

Furthermore, the worm gear housing and the worm housing are of an integrated structure.

Further, the worm wheel is made of nylon, and the worm is made of alloy steel.

Furthermore, lubricating grease is also coated between the worm gear teeth and threads.

Further, the right bearing and the left bearing are both deep groove ball bearings, and the left bearing and the O-shaped rubber ring are pre-pressed during assembly.

Further, the right bearing and the left bearing respectively fix the outer ring of the bearing to the worm housing through the first screw plug and the second screw plug.

The beneficial effects of the utility model: a new worm fixing structure used for electric power steering, the steering is realized through the transmission of the worm gear, and the two ends of the worm are installed inside the worm housing through deep groove ball bearings, wherein the first screw plug, the second The two screw plugs can be replaced with elastic circlips, and the O-shaped rubber ring can be replaced with a disc spring. There is an elastic circlip or a screw plug on the outside of the bearing to fix the outer ring of the bearing to the housing. There is an O-shaped rubber ring between the left bearing and the worm. Or disc spring isolation, which is pre-compressed during assembly, is used to absorb the axial movement of the worm, which can well solve the axial movement of the worm during operation, and improve the meshing noise and reversing of the worm gear and worm. Noise due to clearance.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model.

Fig. 1 is a structural diagram of a novel worm screw fixing structure used in an electric power steering gear of the present invention.

Fig. 2 is a structure diagram of a new worm fixing structure worm used in the electric power steering of the utility model.

Labels in the figure: 1, worm gear housing; 2, worm housing; 3, worm gear; 4, worm; 5, worm gear teeth; 6, thread; 7, right bearing; 8, left bearing; 9, O-shaped rubber ring; 10. The first screw plug; 11. The second screw plug.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

As shown in Figure 1-2, a new worm fixing structure for electric power steering includes a worm gear housing 1 and a worm housing 2. The worm housing 2 is arranged on the top of the worm gear housing 1, and the Housing 1 and worm housing 2 fix and protect the worm gear and worm structure. A worm gear 3 is installed in the worm housing 1, a worm 4 is installed in the worm housing 2, and a worm gear is arranged on the periphery of the worm gear 3. tooth 5, the middle position of the worm 4 is provided with a thread 6, the worm wheel 3 and the worm 4 are connected through the meshing transmission of the worm gear 5 and the thread 6, the worm housing 2 is provided with a right bearing 7, and the right The bearing 7 is installed on the right end of the worm 4, the right side of the right bearing 7 is provided with a first screw plug 10, the worm housing 2 is provided with a left bearing 8, and the left bearing 8 is installed on the worm 4 At the left end position, the worm 4 is installed in the worm housing 2 through the right bearing 7 and the left bearing 8, and the outer ring of the bearing is fixed to the worm housing 2 by the screw plug, which realizes the fixing of the position of the worm and reduces the axial runout , an O-shaped rubber ring 9 is provided between the left bearing 8 and the worm 4, a second screw plug 11 is provided on the left side of the left bearing 8, and an O-shaped rubber ring 9 or a disc spring is arranged between the left bearing 8 and the worm Isolation, which is pre-compressed during assembly, is used to absorb the axial movement of the worm 4, which can well solve the axial movement of the worm 4 during operation, and improve the meshing noise of the worm gear and the backlash due to the reversing. resulting noise.

More specifically, the worm gear housing 1 and the worm housing 2 are of an integrated structure, the worm gear 3 is made of nylon, the worm 4 is made of alloy steel, and the worm gear teeth 5 and threads 6 are Grease is also applied between them. The right bearing 7 and the left bearing 8 are deep groove ball bearings. , The left bearing 8 fixes the outer ring of the bearing to the worm housing 2 through the first screw plug 10 and the second screw plug 11 respectively.

The utility model is improved in that: a new worm fixing structure for electric power steering, the steering is realized through the transmission of the worm gear, and the two ends of the worm 4 are installed inside the worm housing 2 through deep groove ball bearings, wherein the first screw plug 10. The second screw plug 11 can be replaced by an elastic circlip, and the O-shaped rubber ring 9 can be replaced by a disc spring. The outer side of the bearing is fixed to the worm housing 2 by an elastic circlip or a screw plug. The left bearing 8 There is an O-shaped rubber ring 9 or a disc spring to isolate the worm, which is pre-pressed during assembly to absorb the axial movement of the worm 4, which can well solve the axial movement of the worm 4 during operation , and improve the noise caused by the backlash when the worm gear meshes and the reversing.

The above is a preferred embodiment of the utility model, and those skilled in the art of the utility model can also change and modify the above-mentioned embodiment. Therefore, the utility model is not limited to the above-mentioned specific embodiment. Anyone skilled in the art Any obvious improvement, replacement or modification made on the basis of the present utility model belongs to the protection scope of the present utility model.

Claims (6)

1. a kind of novel worm screw fixed structure for electric booster steering device, including turbine body (1), worm screw shell (2), It is characterized in that：The worm screw shell (2) is set to the top of turbine body (1), and worm gear is equipped in the turbine body (1) (3), worm screw (4) is installed, the periphery of the worm gear (3) is equipped with worm-gear toothing (5), the worm screw (4) in the worm screw shell (2) Medium position be equipped with screw thread (6), the worm gear (3) is connected by meshing transmission with worm screw (4) by worm-gear toothing (5), screw thread (6), Right bearing (7) is equipped in the worm screw shell (2), and the right bearing (7) is mounted on worm screw (4) and leans on right end position, it is described It is equipped with the first plug screw (10) on the right side of right bearing (7), left bearing (8), and the left bearing (8) are equipped in the worm screw shell (2) Left position is leaned on worm screw (4), and O-shaped rubber ring (9), the left axle are equipped between the left bearing (8) and worm screw (4) It holds and is equipped with the second plug screw (11) on the left of (8).

2. a kind of novel worm screw fixed structure for electric booster steering device according to claim 1, it is characterised in that： The turbine body (1), worm screw shell (2) are an integral structure.

3. a kind of novel worm screw fixed structure for electric booster steering device according to claim 1, it is characterised in that： The worm gear (3) is made of nylon material, and the worm screw (4) is made of steel alloy.

4. a kind of novel worm screw fixed structure for electric booster steering device according to claim 1, it is characterised in that： The worm-gear toothing (5), screw thread are also coated with lubricating grease between (6).

5. a kind of novel worm screw fixed structure for electric booster steering device according to claim 1, it is characterised in that： The right bearing (7), left bearing (8) are deep groove ball bearing, between the left bearing (8), O-shaped rubber ring (9) in assembly It is closely assembled for precompressed.

6. a kind of novel worm screw fixed structure for electric booster steering device according to claim 1, it is characterised in that： The right bearing (7), left bearing (8) pass through the first plug screw (10), the second plug screw (11) fixing bearing outer ring to worm screw shell respectively On body (2).