JPH02100877U

JPH02100877U -

Info

Publication number: JPH02100877U
Application number: JP961889U
Authority: JP
Priority date: 1989-01-30
Filing date: 1989-01-30
Publication date: 1990-08-10

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係るロータリバル
ブの要部の拡大断面図、第２図は動力舵取装置の
縦断面図、第３図は第２図の―線に沿う断面
図、第４図は第３図の要部の拡大図である。１６…バルブロータ、１６ａ…バルブロータの
溝、１８…バルブスリーブ、１８ａ…バルブスリ
ーブの溝、１８ｂ…バルブスリーブのランド、１
８ｅ…バルブスリーブのエツジ、２２…バルブロ
ータの面取り部。 FIG. 1 is an enlarged sectional view of the main parts of a rotary valve according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a power steering device, and FIG. 3 is a sectional view taken along line - in FIG. FIG. 4 is an enlarged view of the main part of FIG. 3. 16...Valve rotor, 16a...Valve rotor groove, 18...Valve sleeve, 18a...Valve sleeve groove, 18b...Valve sleeve land, 1
8e...Edge of valve sleeve, 22... Chamfered portion of valve rotor.

Claims

[Scope of utility model registration request]

A valve sleeve having a plurality of axial grooves formed on its inner circumferential surface, and a valve rotor fitted into the valve sleeve for relative rotation and having a plurality of axial grooves formed on its outer circumferential surface. A chamfer is formed on the upper edge of both side walls of the groove of the valve rotor, and as the valve sleeve and the valve rotor rotate relative to each other, an opening between the chamfer and the edge of the land portion of the valve sleeve is formed. In a rotary valve of a power steering device that is configured to gradually close, near the end of the chamfered portion on the outer peripheral surface side of the valve rotor,
A rotary valve for a power steering device, characterized in that a portion is provided between the edge of the land portion of the valve sleeve and the chamfered portion to enlarge or substantially constant the opening area.