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electric steering gear

A technology of electric steering gear and screw nut, which is applied in the direction of electric steering gear, mechanical steering gear, power steering gear, etc., to achieve the effects of weight reduction, compact structure, and reduced installation area

Active Publication Date: 2022-06-28
HANGZHOU SHIBAO AUTO STEERING GEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the rack-and-pinion steering device or the steering column-type steering device cannot meet the requirements, the present invention provides an electric steering gear, in which the first motor and the second motor work together, so that the power assist provided during steering will be greatly improved. Lifting to steer vehicles with heavy loads and a compact structure

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] combined with Figure 1-8 , The electric steering gear of this embodiment includes a housing 1, a screw nut assembly 2, an input shaft 8, an output shaft 10, a worm wheel 3, a sensor 9, a first worm 4, a second worm 5, a first motor 6 and The second motor 7, wherein: a screw nut assembly 2 is installed in the housing 1, one end of the screw nut assembly 2 is installed inside the first housing 1, and the other end of the screw nut assembly 2 is installed Extend out of the housing 1 and connect to the input shaft 8; one end of the input shaft 8 is connected to the screw nut assembly 2, and the other end of the input shaft 8 is used to connect the steering wheel; the inner edge of the housing 1 is connected to the screw nut The output shaft 10 is installed in the vertical direction of the assembly 2; the worm wheel 3 is sleeved on one end of the screw nut assembly 2 and the input shaft 8, and the two sides of the worm wheel 3 are respectively engaged with a first worm 4 an...

Embodiment 2

[0034] combined with Figure 1-8, Compared with the technical solution of Embodiment 1, the electric steering gear of this embodiment can be improved as follows: the lead screw nut assembly 2 includes a lead screw 201, a rack nut 202 and a lead screw nut 203, and the lead screw nut 203. The nut 203 is sleeved on the lead screw 201, the rack nut 202 is sleeved on the outer circumference of the lead screw nut 203, one side of the rack nut 202 is abutted against the housing 1, and the other side of the rack nut 202 is connected to the output The shaft 10 is engaged. The worm wheel 4 drives the lead screw 201 to rotate, and the lead screw 201 drives the rack nut 202 to rotate through the lead screw nut 203 , so that the rack nut 202 drives the output shaft 10 to reciprocate.

Embodiment 3

[0036] combined with Figure 1-8 , Compared with the technical solution of Embodiment 1 or 2, the electric steering gear of this embodiment can be improved as follows: there is a gap between the screw nut 203 and the rack nut 202 . The rack nut 202 drives the output shaft 10 to move. During this process, the output shaft 10 exerts a reverse radial force on the rack nut 202, and the radial force pushes the rack nut 202 to move in the radial direction. 1 abuts against each other, and there is a gap between the rack nut 202 and the screw nut 203, so that the housing 1 provides a reverse force for the rack nut 202, and this force is offset with the radial force, avoiding the screw nut The 203 is affected by the radial force, thereby avoiding the deformation of the screw 201 due to the influence of the radial force.

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Abstract

The invention discloses an electric steering gear, which relates to the technical field of power transmission. A screw nut assembly is installed in the housing, and one end of the screw nut assembly is installed inside the first housing. The screw nut assembly The other end of the input shaft protrudes to the outside of the first housing and is connected to the input shaft; one end of the input shaft is connected to the screw nut assembly, and the other end of the input shaft is used to connect to the steering wheel; the inner edge of the housing is connected to the screw nut assembly An output shaft is installed in a vertical direction; the worm gear is sleeved at one end connected between the screw nut assembly and the input shaft, and the first worm and the second worm are respectively engaged on both sides of the worm gear; one end of the first worm is directed toward the wire The direction in which the rod nut assembly is inclined and meshed with the worm gear. The first motor and the second motor work together, so that the power assist provided during steering will be greatly improved, so that the vehicle with heavy load can be steered.

Description

technical field [0001] The invention relates to the technical field of power transmission, in particular to an electric steering gear. Background technique [0002] Modern automotive technology pursues three goals of high efficiency, energy saving, high comfort and high safety. As one of the most important subsystems of the car, the development of the steering system has also been striving to achieve these goals. Compared with the traditional hydraulic power steering system (HPS), the electric power steering system (EPS) can save about 3% to 5% of fuel consumption, and has the advantages of compact structure, energy saving, environmental protection, safety and comfort, etc. However, the output torque of the steering device is large, the integration requirements are high, and the overall design is difficult. Due to practical factors such as the large load of the steering axle of heavy vehicles (generally more than 4 tons) and the single layout of the power steering device (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04B62D3/10
CPCB62D5/0403B62D5/0421B62D3/10
Inventor 朱兴旺朱胜峰马永进万民伟雷浩任培
Owner HANGZHOU SHIBAO AUTO STEERING GEAR