JPH0221358U

JPH0221358U -

Info

Publication number: JPH0221358U
Application number: JP10031688U
Authority: JP
Priority date: 1988-07-28
Filing date: 1988-07-28
Publication date: 1990-02-13

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図はボー
ルねじの平面図、第２図は第１図の線―に沿
つた拡大断面図、第３図、第４図はリターンチユ
ーブを構成する一対の半円管部材のそれぞれの正
面図、第５図は半円管部材を製作するための加工
を示した図、第６図は第５図の矢視から見た図
である。１……ねじ軸、２，４……らせん溝、３……ナ
ツト、５……ボール、９……リターンチユーブ、
９Ａ，９Ｂ……半円管部材、９Ｃ……円管部材、
１７Ａ，１７Ｂ……舌片。 The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view of a ball screw, Fig. 2 is an enlarged sectional view taken along the line - in Fig. 1, and Figs. 3 and 4 are configurations of a return tube. FIG. 5 is a diagram showing processing for manufacturing the semicircular tube members, and FIG. 6 is a view taken from the direction of the arrow in FIG. 5. 1... Screw shaft, 2, 4... Spiral groove, 3... Nut, 5... Ball, 9... Return tube,
9A, 9B...Semicircular tube member, 9C...Circular tube member,
17A, 17B...tongue pieces.

Claims

[Scope of utility model registration request]

A screw shaft with a helical groove on its outer circumferential surface, a nut that fits on the screw shaft and has a helical groove on its inner circumferential surface, and a ball that fits into the helical groove of the screw shaft and the helical groove of the nut and rolls. and a hollow return tube which is installed in the nut and has openings at both ends in the screw shaft and helical groove of the nut to circulate the balls, and has tongues in the openings at both ends to scoop up the balls. A semicircular tube member with a tongue piece formed on one of the openings at both ends and a semicircular tube member with a tongue piece on one of the openings at both ends, which is obtained by dividing a circular tube member with tongue pieces formed at the openings at both ends along a longitudinal section passing through the axis. A ball screw consisting of a semicircular tube member with tongue pieces.