Supercharge Your Innovation With Domain-Expert AI Agents!

Electric Power Steering

A technology of electric power steering and steering shaft, applied in the direction of power steering mechanism, electric steering mechanism, automatic steering control components, etc. Reduce and other problems to achieve the effect of improving the steering feeling

Active Publication Date: 2017-10-10
HONDA MOTOR CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the accuracy of the magnetostrictive torque sensor for detecting the rotational moment decreases due to the detection of the bending moment
Since bending moments of different magnitudes act on the two magnetostrictive materials, even if the difference in output such as AC resistance is obtained from the corresponding detection mechanism, the amount of bending moments cannot be offset.
Therefore, the detection accuracy of the steering torque decreases
There is room for further improvement in torque detection accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric Power Steering
  • Electric Power Steering
  • Electric Power Steering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] based on figure 1 , the configuration of the steering column assist type electric power steering apparatus equipped with the rotation torque detection device of the first embodiment will be described.

[0046] Such as figure 1 As shown, a steering column assist type electric power steering device 10 (hereinafter referred to as "electric power steering device 10") includes a steering system 20 from a steering wheel 21 of a vehicle to steered wheels 29, 29 (for example, front wheels) of a vehicle and a steering The steering system 20 has an assist torque mechanism 40 that applies assist torque.

[0047] In the steering system 20 , a pinion shaft 24 is connected to the steering wheel 21 via a steering shaft 22 (shaft 22 ) and universal joints 23 , 23 , and a rack is connected to the pinion shaft 24 via a rack-and-pinion mechanism 25 . The shaft 26 has left and right steered wheels 29 , 29 connected to both ends of the rack shaft 26 via left and right tie rods 27 , 27 and...

Embodiment 2

[0088] Next, Embodiment 2 of the present invention will be described based on the drawings.

[0089] Figure 5 (a) shows a cross-sectional structure of an electric power steering device equipped with a rotation torque detection device according to Embodiment 2, which is the same as the above-mentioned figure 2 Express accordingly. Compared with the electric power steering device of the first embodiment, the number of bearings arranged at one location is changed.

[0090] Such as Figure 5 As shown in (a), in the electric power steering apparatus 10A of the second embodiment, the first bearings 64A, 64A are constituted by a plurality of single-row rolling bearings mounted continuously along the steering shaft 22 . Also in the electric power steering apparatus 10B formed in this way, the effects prescribed by the present invention can be obtained.

[0091] also refer to Figure 5 (b), a plurality of first bearings 64A, 64A are arranged. Accordingly, the deflection amount ...

Embodiment 3

[0093] Next, Embodiment 3 of the present invention will be described based on the drawings.

[0094] Figure 6 (a) shows a cross-sectional structure of an electric power steering device equipped with a rotational torque detection device according to Embodiment 3, which is the same as the above-mentioned figure 2 Express accordingly. Compared with the electric power steering device of the first embodiment, the number of bearings arranged at one location is changed.

[0095] Such as Figure 6 As shown in (a), in the electric power steering apparatus 10B of the third embodiment, the second bearings 65B, 65B are constituted by a plurality of single-row rolling bearings mounted continuously along the steering shaft 22 . Also in the electric power steering apparatus 10B formed in this way, the effects prescribed by the present invention can be obtained.

[0096] also refer to Figure 6 (b), a plurality of second bearings 65B, 65B are arranged. Accordingly, the deflection amou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

A steering column assist type electric power steering device (10) includes: a steering shaft (22); a magnetostrictive torque sensor (80) for detecting torque generated on the steering shaft (22); and bearings (64, 65), which supports the steering shaft (22) to be rotatable. The magnetostrictive torque sensor (80) includes: a magnetostrictive film (81), which is arranged on the outer peripheral surface of the steering shaft (22); and a detection part (83), which is connected to the magnetostrictive film (81) Opposite sets are used to detect changes in magnetic permeability. The bearings (64, 65) are attached to two places in the axial direction of the steering shaft (22) so as to sandwich the detection part (83).

Description

technical field [0001] The invention relates to an improved electric power steering device. Background technique [0002] Electric power steering is used in the steering system of most vehicles. The electric power steering device is a device that reduces the steering force of the driver when the driver rotates the steering wheel, thereby giving the driver a comfortable steering feeling. [0003] Such an electric power steering device has a rotational torque detection mechanism. The rotation torque detection mechanism is a device that detects the magnitude and direction of the rotation torque (steering torque) acting on the steering system of the vehicle when the driver rotates the steering wheel. An assist torque is generated by the electric motor based on a detection result detected by the rotation torque detection means, and the assist torque is applied to the steering system. [0004] In particular, an electric power steering system that transmits assist torque to a st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04G01L3/10
CPCB62D6/10G01L5/221G01L3/102B62D5/0463
Inventor 白石岳人清水康夫
Owner HONDA MOTOR CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com