Title:
BALL SCREW
Document Type and Number:
Japanese Patent JP2022128886
Kind Code:
A
Abstract:
To provide a compact and inexpensive ball screw having excellent screw rotating and supporting functions and a small number of components.SOLUTION: A ball screw S includes a ball holder 2 having a plurality of hole parts 22 penetrating through a cylindrical wall part 21 and arranged in a peripheral direction, an outer race 3 having one annular groove 31 formed along the peripheral direction at a position opposite to the hole parts 22 so as to be rotatable relative to the ball holder 2, a screw 1 having at least one streak of a screw groove 11, and a ball B embraced by the hole parts 22 and fitted to the annular groove 31 and the screw groove 11, the ball B including one or more first-stage ball B1 arranged along the peripheral direction of an axial center X, and one or more second-stage ball B2 arranged at a different position in the direction of the axial center X. The first-stage ball B1 only abuts on one end side along the axial center X out of the inner face of the annular groove 31, and the second-stage ball B2 only abuts on the other end side.SELECTED DRAWING: Figure 1
Inventors:
KATO TAKESHI
Application Number:
JP2021027344A
Publication Date:
September 05, 2022
Filing Date:
February 24, 2021
Export Citation:
Assignee:
AISHIN KK
International Classes:
F16H25/22; F16H25/24
Attorney, Agent or Firm:
山▲崎▼ 徹也
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