Invention Grant
US09446787B2 Ball screw device, power transfer mechanism, electric power steering apparatus, and method for manufacturing ball screw device
有权
滚珠丝杠装置，动力传递机构，电动助力转向装置以及滚珠丝杠装置的制造方法
- Patent Title: Ball screw device, power transfer mechanism, electric power steering apparatus, and method for manufacturing ball screw device
- Patent Title (中): 滚珠丝杠装置，动力传递机构，电动助力转向装置以及滚珠丝杠装置的制造方法
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Application No.: US14674045Application Date: 2015-03-31
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Publication No.: US09446787B2Publication Date: 2016-09-20
- Inventor: Toshihiro Asakura , Tetsuya Kaneko , Satoshi Fujita
- Applicant: JTEKT CORPORATION
- Applicant Address: JP Osaka
- Assignee: JTEKT CORPORATION
- Current Assignee: JTEKT CORPORATION
- Current Assignee Address: JP Osaka
- Agency: Oliff PLC
- Priority: JP2014-078836 20140407
- Main IPC: B62D5/04
- IPC: B62D5/04 ; F16H25/22 ; B23C3/30 ; F16H25/20 ; F16H25/24
Abstract:
A ball screw device is provided for which quality can be easily evaluated. The ball screw device includes a threaded shaft with a groove formed on an outer peripheral surface of the shaft, and a cylindrical nut whose screw-thread mates with the groove on the threaded shaft via a plurality of balls. The nut has a pair of mounting holes in each of which a deflector is installed and a communication groove that allows the mounting holes to communicate with each other and is open on the outer peripheral surface of the nut and through which the balls can roll. The width W of an opening of the communication groove is smaller than the diameter of the ball.
Public/Granted literature
Information query
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