JPS62177920U

JPS62177920U -

Info

Publication number: JPS62177920U
Application number: JP6547486U
Authority: JP
Priority date: 1986-04-30
Filing date: 1986-04-30
Publication date: 1987-11-12

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係るスプライン軸防
塵機構の縦断面図、第２図は第１図のＡ―Ａ線に
沿つた拡大断面図である。１……スプライン軸、２……スプライン軸受部
、４……タイミングプーリ、７……ベアリング押
え、８……ハウジング、９……内フランジ、１０
……通気孔、１１……外フランジ、１２……凹形
環状溝、１３……排気孔、１４……タイミングベ
ルト、１５，１７……隙間、１６……空隙部。 FIG. 1 is a longitudinal sectional view of a spline shaft dustproof mechanism according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1. DESCRIPTION OF SYMBOLS 1... Spline shaft, 2... Spline bearing part, 4... Timing pulley, 7... Bearing holder, 8... Housing, 9... Inner flange, 10
...Vent hole, 11...Outer flange, 12...Concave annular groove, 13...Exhaust hole, 14...Timing belt, 15, 17...Gap, 16...Void portion.

Claims

[Scope of utility model registration request]

A spline bearing part that pivotally supports a spline shaft;
A rotary/linear sliding device comprising: a housing that pivotally supports the spline bearing portion via a rolling bearing; an axial drive mechanism that slides the spline shaft in the axial direction; and a rotation drive mechanism that rotates the spline bearing portion. The device includes an inner flange through which the spline shaft is inserted and closely fixed to an end face of the spline bearing portion, and an outer flange attached to the housing so as to surround the inner flange, the inner flange , an outer end inner circumferential portion having an extremely small gap with respect to the outer shape of the spline shaft and an inner end inner circumferential portion having a wide gap with respect to the spline shaft are formed in the spline shaft insertion portion; A ventilation hole communicating from the cavity to the outer peripheral surface is formed, and the outer flange has an inner peripheral part having an extremely small gap with the outer peripheral surface of the inner flange, and a concave annular groove is formed in the inner peripheral part. A dustproof mechanism for a rotary/linear sliding shaft, characterized in that an exhaust hole is formed and communicates from the annular groove of the concave portion to the outer circumference, and further includes an exhaust source connected to the exhaust hole.