Title:
BALL SCREW DEVICE
Document Type and Number:
Japanese Patent JP2023157659
Kind Code:
A
Abstract:
To provide a ball screw device having a structure for both of connection of a nut of a ball screw and a piston, and prevention of co-rotation of the piston.SOLUTION: In a structure for fastening a piston 11 transmitting thrust of a nut 5 of a ball screw in a cylinder 11 and the nut 5 of the ball screw, the piston 11 and the nut 5 are fitted at their end portions opposed to each other and connected via a fixing member 31 in a fitted region. The fixing member 31 is disposed in a manner of projecting outward from an outer diameter side of a connecting region of the piston 11 and the nut 5, and a bolt head portion 31a as a projecting region part of the fixing member 31 is guided by a guide groove 33 extending in a moving direction of the piston at an inner diameter of the cylinder, thus it functions as a rotation prevention structure 17 for preventing co-rotation with the nut 5.SELECTED DRAWING: Figure 2
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Inventors:
MIYAMORI TOMOKO
Application Number:
JP2022067708A
Publication Date:
October 26, 2023
Filing Date:
April 15, 2022
Export Citation:
Assignee:
NSK LTD
International Classes:
F16H25/24; B60T13/74; F16D65/16; F16H25/20; F16H25/22
Attorney, Agent or Firm:
Yoshimi Kobayashi