发明申请
- 专利标题： BALL SCREW UNIT AND ELECTRIC POWER STEERING APPARATUS
- 专利标题（中）： 球螺丝机和电动转向装置
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申请号： US12702461申请日： 2010-02-09
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公开(公告)号： US20100206656A1公开(公告)日： 2010-08-19
- 发明人: Toshihiro ASAKURA , Takashi HARA
- 申请人： Toshihiro ASAKURA , Takashi HARA
- 申请人地址： JP Osaka
- 专利权人： JTEKT CORPORATION
- 当前专利权人： JTEKT CORPORATION
- 当前专利权人地址： JP Osaka
- 优先权： JP2009-031407 20090213; JP2009-146667 20090619
- 主分类号： B62D5/04
- IPC分类号： B62D5/04 ; F16H25/22
摘要：
A fitting recess portion that connects fitting holes to each other is formed in a peripheral face of a ball screw nut. A circulation member includes a pair of fitted portions that are fitted in the fitting holes, and a connecting portion that provides communication between the fitted portions. A communication groove that has an opening on the fitted end side of the connecting portion and that extends in the axial direction is formed in the connecting portion. When the connecting portion is fitted in the fitting recess portion and the opening of the communication groove formed in the connecting portion is blocked by a bottom portion of the fitting recess portion, a second path that forms a return path together with first paths formed in the fitted portions is formed.
公开/授权文献
- US08544356B2 Ball screw unit and electric power steering apparatus 公开/授权日：2013-10-01
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