Invention Grant
- Patent Title: Ball screw and steering apparatus
- Patent Title (中): 滚珠丝杠和转向装置
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Application No.: US14861426Application Date: 2015-09-22
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Publication No.: US09573618B2Publication Date: 2017-02-21
- Inventor: Ryota Ito
- Applicant: Showa Corporation
- Applicant Address: JP Gyoda-Shi
- Assignee: SHOWA CORPORATION
- Current Assignee: SHOWA CORPORATION
- Current Assignee Address: JP Gyoda-Shi
- Agency: Leason Ellis LLP
- Priority: JP2015-007330 20150119
- Main IPC: B62D5/04
- IPC: B62D5/04 ; F16H25/22
Abstract:
A ball screw includes a nut, a screw shaft, an end deflector attached to the nut, plural balls, and a pair of ball lifting portions. A spiral groove is formed at an outer peripheral surface in the screw shaft. The plural balls roll along the spiral groove. The pair of ball lifting portions is provided at the end deflector so as to interpose a width center of the spiral groove. The pair of ball lifting portions supports the balls by a first part of one of the pair of ball lifting portions and a second part of other of the pair of ball lifting portions being apart from each other in a width direction of the spiral groove so as to interpose the width center of the spiral groove between the first and second parts to thereby lift the balls from the spiral groove.
Public/Granted literature
- US20160207566A1 BALL SCREW AND STEERING APPARATUS Public/Granted day:2016-07-21
Information query
IPC分类:
