Title:
ボールねじナット、該ボールねじナットを使用した直線案内装置及びステアリング用ボールねじ並びにボールねじナットの製造方法
Document Type and Number:
Japanese Patent JP4230020
Kind Code:
B2
Abstract:
A ball rolling groove 1c is defined in an inner peripheral surface of A ball screwed nut 1 by a rolling process, not by a grinding process so that a ball screwed nut having small diameters or large leads can be manufactured. The surface of the ball rolling groove 1c is finished to be sharp without concave and convex by a plastic working by the rolling process, so that the surface is less rough. By rolling the surface by the rolling process excellent in durability, the precision of R shape of the ball rolling groove 1c can be made excellent.
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Inventors:
Katsuhiro Sonoda
Takeki Shirai
Shigeru Yamanaka
Takeki Shirai
Shigeru Yamanaka
Application Number:
JP25861198A
Publication Date:
February 25, 2009
Filing Date:
September 11, 1998
Export Citation:
Assignee:
THK CO.,LTD.
International Classes:
B23G1/00; F16H25/22; B21H3/08; B23P15/00
Domestic Patent References:
| JP9192772A | ||||
| JP10193022A | ||||
| JP63016827A | ||||
| JP3051561A | ||||
| JP5079040U | ||||
| JP7251230A | ||||
| JP11201257A |
Attorney, Agent or Firm:
Yasuo Ishikawa
Koji Yamamoto
Koji Yamamoto