Title:
BALL SCREW AND LINEAR MOTION ACTUATOR
Document Type and Number:
Japanese Patent JP2023115585
Kind Code:
A
Abstract:
To provide a ball screw which can suppress a deformation of a screw shaft and a fall of rotation prohibition means from the screw shaft.SOLUTION: In a ball screw 4 having a screw shaft 20, a nut 15, a rotation prohibition ring 30 attached to a tip circumferential part 24 of a tip side of the screw shaft 20, and movement regulation means 40 for regulating the movement of the rotation prohibition ring 30 in an axial direction, and used in a linear motion actuator 1 in which a rotational motion of the nut 15 is converted to a linear motion of the screw shaft 20, the rotation prohibition ring 30 comprises: a ring member 31; an outside protrusion 32 protruding from an external peripheral face of the ring member 31; and an inside protrusion 33 protruding from an internal peripheral face of the ring member 31. The outside protrusion 32 has parallel two guide faces 34 protruding from the external peripheral face 26 of the ring member 31, and chamfered parts 35 are formed at both end parts of the guide faces 34 in the axial direction.SELECTED DRAWING: Figure 3
Inventors:
JO KEI
ABE YASUAKI
SATO KANTA
ABE YASUAKI
SATO KANTA
Application Number:
JP2022017885A
Publication Date:
August 21, 2023
Filing Date:
February 08, 2022
Export Citation:
Assignee:
NSK LTD
International Classes:
F16H25/24; F16B3/00; F16B4/00; F16H25/22
Attorney, Agent or Firm:
田中 秀▲てつ▼
Hajime Hirose
Tetsuya Mori
Hajime Hirose
Tetsuya Mori
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