发明名称 |
Ball Screw and Manufacturing Method of Nut for Ball Screw |
摘要 |
A ball screw is provided in which an outer circumferential formation is formed at a portion facing a ball circulating passage out of outer circumferential surface of a nut. The ball screw includes: a screw shaft having on its outer circumferential surface a screw groove; a nut having on its inner circumferential surface a screw groove facing the screw groove; a plurality of balls rollably loaded in a spiral ball rolling passage formed by both screw grooves; and a ball circulating passage to return the balls from a start point to an end point of the ball rolling passage for recirculation. The ball circulating passage is a concaved groove formed by concaving a groove on a part of the cylindrical inner circumferential surface of the nut by plastic working. Then, a flange is integrally provided at a portion facing the ball circulating passage and the screw groove. |
申请公布号 |
US2012325036(A1) |
申请公布日期 |
2012.12.27 |
申请号 |
US201113581210 |
申请日期 |
2011.03.16 |
申请人 |
HARADA TORU;HASHIMOTO KOJI;ITO TSUYOSHI;YAMASHITA TOMOFUMI;AOKI NAOYA;NSK LTD. |
发明人 |
HARADA TORU;HASHIMOTO KOJI;ITO TSUYOSHI;YAMASHITA TOMOFUMI;AOKI NAOYA |
分类号 |
F16H25/22;B21K1/70 |
主分类号 |
F16H25/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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