Telescopic Shaft and Steering System
US-2016185378-A1 · Jun 30, 2016 · US
Rotation-linear motion conversion apparatus and steering apparatus
US2016167697A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016167697-A1 |
| Application number | US-201414906207-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 22, 2014 |
| Priority date | Jul 22, 2013 |
| Publication date | Jun 16, 2016 |
| Grant date | — |
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- Title
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Abstract
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This rotation-linear motion conversion apparatus ( 10 ) includes: a pinion shaft ( 20 ) in which a pinion gear ( 22 ) is formed; a rack bar ( 30 ) in which a rack gear ( 32 ) that engages with the pinion gear ( 22 ) and a support surface ( 31 ) along a longitudinal direction are formed; and a support part ( 40 ) that supports the rack bar ( 30 ) movably along the support surface ( 31 ). The support part ( 40 ) prevents a movement of the rack bar ( 30 ) in a direction X perpendicular to a surface ( 30 a ) in which the rack gear ( 32 ) is formed.
First claim
Opening claim text (preview).
1 . A rotation-linear motion conversion apparatus comprising: a pinion shaft in which a pinion gear is formed; a rack bar in which a rack gear that engages with the pinion gear and a support surface along a longitudinal direction are formed; and a support part that supports the rack bar movably along the support surface. 2 . The rotation-linear motion conversion apparatus according to claim 1 , wherein the support part prevents the rack bar from relatively moving in a direction perpendicular to a surface in which the rack gear is formed. 3 . The rotation-linear motion conversion apparatus according to claim 1 , comprising a plurality of rolling elements that are provided between the support part and the rack bar and roll on the support surface. 4 . The rotation-linear motion conversion apparatus according to claim 1 , wherein the pinion gear and the rack gear are each formed as a spur gear, a tooth width direction of the rack gear crosses with respect to a width direction of the rack bar, and a pitch surface of the rack gear is tilted in a thickness direction of the rack bar. 5 . The rotation-linear motion conversion apparatus according to claim 1 , comprising: a second rack gear that is formed on the rack bar; a second pinion gear that engages with the second rack gear; and a rotation drive device that rotates the second pinion gear. 6 . The rotation-linear motion conversion apparatus according to claim 1 , comprising: a spiral ball thread groove that is formed on the rack bar; a ball nut that engages with the ball thread groove; and a rotation drive device that rotates the ball nut. 7 . The rotation-linear motion conversion apparatus according to claim 1 , comprising: a rack cover that covers the outer circumference of the rack bar; a tilt part that is provided on the rack cover and tilts such that the tilt part approaches the rack bar as the tilt part is directed toward the rack bar; and a push part that pushes the support part to the tilt part in a longitudinal direction of the rack bar. 8 . The rotation-linear motion conversion apparatus according to claim 7 , wherein the push part includes a second tilt part that tilts such that the second tilt part approaches the rack bar while the second tilt part is opposed to the rack bar, and the support part is interposed between the tilt part and the second tilt part in the longitudinal direction of the rack bar. 9 . The rotation-linear motion conversion apparatus according to claim 1 , wherein the support part includes a plurality of cam members that are arranged at intervals in a longitudinal direction of the rack bar and comes into contact rotatably with the support surface in the longitudinal direction of the rack bar. 10 . A steering apparatus comprising: a steering shaft that is connected to a steering wheel; a link member that is connected to a wheel; and a rotation-linear motion conversion apparatus that converts a rotation of the steering shaft into a linear motion and linearly moves the link member, wherein a rotation-linear motion conversion apparatus according to claim 1 is used as the rotation-linear motion conversion apparatus.
Assignees
Inventors
Classifications
with four rows of balls · CPC title
Steering systems, e.g. steering rods or columns · CPC title
with balls · CPC title
comprising a rack · CPC title
- B62D3/12Primary
of rack-and-pinion type · CPC title
Patent family
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Frequently asked questions
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- What does patent US2016167697A1 cover?
- This rotation-linear motion conversion apparatus ( 10 ) includes: a pinion shaft ( 20 ) in which a pinion gear ( 22 ) is formed; a rack bar ( 30 ) in which a rack gear ( 32 ) that engages with the pinion gear ( 22 ) and a support surface ( 31 ) along a longitudinal direction are formed; and a support part ( 40 ) that supports the rack bar ( 30 ) movably along the support surface ( 31 ). The sup…
- Who is the assignee on this patent?
- Thk Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B62D3/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jun 16 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).