Title:
ボールねじ装置
Document Type and Number:
Japanese Patent JP7226961
Kind Code:
B2
Abstract:
Provided is a ball screw device which enables easy production and assembly of a nut member (3) and formation of an endless circulation path for balls in the nut member (3) with high accuracy. The nut member (3) includes a plurality of nut components (5,6) arranged in a superposed manner along an axial direction of a screw shaft (2). At a boundary portion between the nut components (5, 6) which are adjacent to each other, a raceway path (30) for balls (4) extending around a periphery of the screw shaft (2) is formed. A joining surface of each of the nut components (5, 6) used for joining with another one of the nut components includes: a raceway forming surface (53, 62) which is annularly formed around the through hole; and an abutment surface (50,60) for joining which is formed on an outer side in a radial direction with respect to the raceway forming surface (53, 62).
Inventors:
Tetsuhiro Nishide
Sho Iwaki
Sho Iwaki
Application Number:
JP2018197357A
Publication Date:
February 21, 2023
Filing Date:
October 19, 2018
Export Citation:
Assignee:
THK CO.,LTD.
International Classes:
F16H25/24; F16H25/22
Domestic Patent References:
| JP2018096539A | ||||
| JP6257657A |
Foreign References:
| WO2007029716A1 | ||||
| EP1500572A2 |
Attorney, Agent or Firm:
Tetsuro Ide
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