Title:
BALL SCREW
Document Type and Number:
Japanese Patent JP2021116825
Kind Code:
A
Abstract:
To provide a ball screw that can downsize a member pressing a pressed member.SOLUTION: A ball screw 10 is provided with a nut 30, a screw shaft 40, and a plurality of rolling bodies 51. The nut 30 is equipped with a cylindrical nut body 31 equipped with a first screw groove 311 on an inner peripheral surface, and a pressing portion 33 that blocks one end in an axial direction of the nut body 31. The screw shaft 40 is equipped with a screw shaft body 41 equipped with a second screw groove 411 on an outer peripheral surface and disposed on the inside of the nut body 31. The plurality of rolling bodies 51 is disposed in a rolling path 55 that is a spiral space between the first screw groove 311 and the second screw groove 411. The screw shaft body 41 is equipped with a circulation groove 415 leading the rolling bodies 51 from one end to the other end of the rolling path 55.SELECTED DRAWING: Figure 1
Inventors:
ABE YASUAKI
Application Number:
JP2020008631A
Publication Date:
August 10, 2021
Filing Date:
January 22, 2020
Export Citation:
Assignee:
NSK LTD
International Classes:
F16H25/24; B60T13/74; F16D65/18; F16H25/22
Domestic Patent References:
| JP2017524880A | 2017-08-31 |
Attorney, Agent or Firm:
Sakai International Patent Office