Blank and method of manufacturing rack shaft using the same
US-9492897-B2 · Nov 15, 2016 · US
Rack bar and rack bar teeth forming die
US10060518B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10060518-B2 |
| Application number | US-201615067788-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 11, 2016 |
| Priority date | Jun 21, 2012 |
| Publication date | Aug 28, 2018 |
| Grant date | Aug 28, 2018 |
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- Title
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Abstract
Official abstract text for this publication.
A rack bar includes a shaft portion and a rack toothed portion provided on the shaft portion. The rack toothed portion includes a plurality of rack teeth provided side by side in an axial direction of the shaft portion to mesh with a pinion gear. Each of the rack teeth includes a tooth tip portion, a contact face arranged obliquely relative to the axial direction and configured to contact the pinion gear, and a rounded corner portion between the tooth tip portion and the contact face. A first radius defining a central area of the rounded corner portion with respect to a tooth width direction is larger than a second radius defining another area of the rounded corner portion other than the central area.
First claim
Opening claim text (preview).
What is claimed is: 1. A teeth forming die configured to form rack teeth of a rack bar to be meshed with a pinion gear, the teeth forming die comprising a securing portion configured to be secured to an outside clamp case, and a rack teeth transfer portion provided on the securing portion, wherein the rack teeth transfer portion comprises a plurality of rack tooth transfer portions provided side by side in a line, wherein each of the rack tooth transfer portions is configured to transfer a profile of each rack tooth, each of the rack tooth transfer portions comprising a tooth bottom transfer portion configured to transfer a profile of a tooth bottom portion of the rack tooth, a tooth tip transfer portion configured to transfer a profile of a tooth tip portion of the rack tooth, a contact face transfer portion arranged obliquely relative to a direction of the line in which the rack tooth transfer portions are provided side by side and configured to transfer a profile of a contact face of the rack tooth to be brought into contact with the pinion gear, and a rounded corner portion between the tooth tip transfer portion and the contact face transfer portion, wherein a first radius defining a central area of the rounded corner portion with respect to a tooth width direction is larger than a second radius defining another area of the rounded corner portion other than the central area. 2. The teeth forming die according to claim 1 , wherein at least one of the first radius and the second radius is different for each of the rack tooth transfer portions.
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Frequently asked questions
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- What does patent US10060518B2 cover?
- A rack bar includes a shaft portion and a rack toothed portion provided on the shaft portion. The rack toothed portion includes a plurality of rack teeth provided side by side in an axial direction of the shaft portion to mesh with a pinion gear. Each of the rack teeth includes a tooth tip portion, a contact face arranged obliquely relative to the axial direction and configured to contact the p…
- Who is the assignee on this patent?
- Neturen Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B21K1/768. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 28 2018 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).