发明名称 |
HOLLOW RACK BAR AND METHOD OF MANUFACTURING HOLLOW RACK BAR |
摘要 |
A hollow rack bar and a method of manufacturing the hollow rack bar are provided. The hollow rack bar includes a hollow blank pipe portion having a uniform wall thickness, and a rack toothed portion. The rack toothed portion includes teeth, a flat portion having a flat surface and arranged side by side with the teeth in a direction along a center axis of the blank pipe portion, and a slanted portion provided at an end of the flat portion with respect to a direction perpendicular to the center axis and arranged to be lower than the flat portion. A length of the slanted portion projected on a straight line perpendicular to the center axis and parallel to the surface of the flat portion is longer than zero and equal to or shorter than the wall thickness of the blank pipe portion. |
申请公布号 |
US2015276037(A1) |
申请公布日期 |
2015.10.01 |
申请号 |
US201314435635 |
申请日期 |
2013.10.11 |
申请人 |
NETUREN CO., LTD. |
发明人 |
Yamawaki Takashi;Nomura Makoto;Aoki Kenichi |
分类号 |
F16H55/26;B21K1/76 |
主分类号 |
F16H55/26 |
代理机构 |
|
代理人 |
|
主权项 |
1. A hollow rack bar comprising:
a hollow blank pipe portion having a uniform wall thickness; and a rack toothed portion comprising teeth, a flat portion having a flat surface and arranged side by side with the teeth in a direction along a center axis of the blank pipe portion, and a slanted portion provided at an end of the flat portion with respect to a direction perpendicular to the center axis and arranged to be lower than the flat portion, wherein a length of the slanted portion projected on a straight line perpendicular to the center axis and parallel to the surface of the flat portion is longer than zero and equal to or shorter than the wall thickness of the blank pipe portion. |
地址 |
Shinagawa-ku, Tokyo JP |