Steering system
US-2016355209-A1 · Dec 8, 2016 · US
Rack and pinion mechanism
US2016229443A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016229443-A1 |
| Application number | US-201514866189-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 25, 2015 |
| Priority date | Feb 5, 2015 |
| Publication date | Aug 11, 2016 |
| Grant date | — |
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- Title
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Abstract
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A rack and pinion mechanism includes: a pinion shaft at which pinion teeth are formed; a rack shaft at which rack teeth to be engaged with the pinion teeth are formed; a pressing portion arranged at a side of the rack shaft opposite to a side of the rack shaft at which the rack teeth are formed and pressing the rack shaft toward the pinion shaft; a first elastic body biasing the pressing portion in a direction approaching the pinion shaft by an elastic restoring force; and a second elastic body biasing the pressing portion in a direction away from the pinion shaft by an elastic restoring force, and a first biasing force with which the first elastic body biases the pressing portion is larger than a second biasing force with which the second elastic body biases the pressing portion in an initial state.
First claim
Opening claim text (preview).
What is claimed is: 1 . A rack and pinion mechanism comprising: a pinion shaft at which pinion teeth are formed; a rack shaft at which rack teeth to be engaged with the pinion teeth are formed; a pressing portion arranged at a side of the rack shaft opposite to a side of the rack shaft at which the rack teeth are formed and pressing the rack shaft toward the pinion shaft; a first elastic body biasing the pressing portion in a direction approaching the pinion shaft by an elastic restoring force; and a second elastic body biasing the pressing portion in a direction away from the pinion shaft by an elastic restoring force, wherein a first biasing force with which the first elastic body biases the pressing portion is larger than a second biasing force with which the second elastic body biases the pressing portion in an initial state. 2 . The rack and pinion mechanism according to claim 1 , further comprising: a receiving portion arranged so as to face the pressing portion with the rack shaft interposed therebetween and integrally formed with the pressing portion, which receives the second biasing force of the second elastic body. 3 . The rack and pinion mechanism according to claim 1 , wherein the second elastic body is restored to a natural length when the rack shaft is separated from the pinion shaft by an external force. 4 . The rack and pinion mechanism according to claim 2 , wherein the second elastic body is restored to a natural length when the rack shaft is separated from the pinion shaft by an external force. 5 . The rack and pinion mechanism according claim 1 , wherein a first spring rate of the first elastic body is higher than a second spring rate of the second elastic body. 6 . The rack and pinion mechanism according claim 2 , wherein a first spring rate of the first elastic body is higher than a second spring rate of the second elastic body. 7 . The rack and pinion mechanism according claim 3 , wherein a first spring rate of the first elastic body is higher than a second spring rate of the second elastic body. 8 . The rack and pinion mechanism according claim 4 , wherein a first spring rate of the first elastic body is higher than a second spring rate of the second elastic body.
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- What does patent US2016229443A1 cover?
- A rack and pinion mechanism includes: a pinion shaft at which pinion teeth are formed; a rack shaft at which rack teeth to be engaged with the pinion teeth are formed; a pressing portion arranged at a side of the rack shaft opposite to a side of the rack shaft at which the rack teeth are formed and pressing the rack shaft toward the pinion shaft; a first elastic body biasing the pressing portio…
- Who is the assignee on this patent?
- Showa Corp
- What technology area does this patent fall under?
- Primary CPC classification B62D3/126. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Aug 11 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).