Vehicle Steering System
US-2017349204-A1 · Dec 7, 2017 · US
Electric power steering device
US9783225B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9783225-B2 |
| Application number | US-201514967900-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 14, 2015 |
| Priority date | Dec 22, 2014 |
| Publication date | Oct 10, 2017 |
| Grant date | Oct 10, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An electric power steering device includes a restricting portion that is provided on at least one of surfaces of a housing and a worm wheel, the surfaces facing each other. The restricting portion is configured to restrict movement of the worm wheel to maintain a meshing relationship between a worm and the worm wheel that allows torque transmission between the worm and the worm wheel, when fixing of the worm wheel to an output shaft of a power assist actuator in an axial direction of the output shaft is released and the worm wheel is moved in the axial direction.
First claim
Opening claim text (preview).
What is claimed is: 1. An electric power steering device comprising: a power assist actuator that includes a motor and a worm reducer, the worm reducer including a worm that is connected to a drive shaft of the motor, a worm wheel that meshes with the worm and is axially attached to an output shaft of the power assist actuator by press-fitting such that the worm wheel is unable to rotate relative to the output shaft, and a housing that accommodates the worm wheel, and the electric power steering device being configured to provide power assistance via the output shaft; a restricting portion that is provided on at least one of surfaces of the housing and the worm wheel, the surfaces facing each other, and the restricting portion being configured to restrict movement of the worm wheel to maintain a meshing relationship between the worm and the worm wheel that allows torque transmission between the worm and the worm wheel, when fixing of the worm wheel to the output shaft, by press-fitting of the worm wheel to the output shaft, in an axial direction of the output shaft is released and the worm wheel is moved in the axial direction; a bearing is provided in the housing, and the bearing supports the output shaft such that the output shaft is rotatable; and the restricting portion is provided at least on an inner surface of the housing that faces one axial side surface of the worm wheel, and the restriction portion is located closer to the one axial side surface than the bearing is. 2. The electric power steering device according to claim 1 , wherein the restricting portion is a boss that protrudes toward the one axial side surface of the worm wheel.
Assignees
Inventors
Classifications
- B62D5/043Primary
characterised by clutch means between driving element, e.g. motor, and driven element, e.g. steering column or steering gear · CPC title
Worm gears · CPC title
- B62D5/0403Primary
characterised by constructional features, e.g. common housing for motor and gear box · CPC title
- B62D5/0409Primary
Electric motor acting on the steering column · CPC title
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- What does patent US9783225B2 cover?
- An electric power steering device includes a restricting portion that is provided on at least one of surfaces of a housing and a worm wheel, the surfaces facing each other. The restricting portion is configured to restrict movement of the worm wheel to maintain a meshing relationship between a worm and the worm wheel that allows torque transmission between the worm and the worm wheel, when fixi…
- Who is the assignee on this patent?
- Jtekt Corp, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B62D5/043. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 10 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).