JPS6254882U

JPS6254882U -

Info

Publication number: JPS6254882U
Application number: JP14705685U
Authority: JP
Priority date: 1985-09-26
Filing date: 1985-09-26
Publication date: 1987-04-04
Also published as: JPH0431193Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す要部断面図、
第２図は後輪操舵装置の概略図、第３図は第１図
の―矢視図、第４図はバルブ本体４８の展開
図、第５図は第４図の―矢視図、第６ａ，ｂ
図はバルブ本体４８の作動を示す作動説明詳細図
である。１０……後輪操舵用アクチユエータ、３０……
方向制御バルブ、３１……ピニオンシヤフト、４
２……サンギヤ、４７……プラネタリギヤ、４８
……バルブ本体、４９……遊星歯車機構、５０，
５１……入力ポート、５２，５３……出力ポート
、５６，５７……環状突起。 FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention;
FIG. 2 is a schematic diagram of the rear wheel steering system, FIG. 3 is a view in the direction of the - arrow in FIG. 1, FIG. 4 is a developed view of the valve body 48, and FIG. 6a,b
The figure is a detailed diagram illustrating the operation of the valve body 48. 10... Rear wheel steering actuator, 30...
Directional control valve, 31...Pinion shaft, 4
2...Sun gear, 47...Planetary gear, 48
... Valve body, 49 ... Planetary gear mechanism, 50,
51... Input port, 52, 53... Output port, 56, 57... Annular projection.

Claims

[Scope of utility model registration request]

A center shaft that rotates in conjunction with the rotation of the steering wheel, a sun gear provided on the center shaft, a planetary gear meshed with the sun gear and provided on the outer circumferential side of the sun gear, and an inner surface formed on the inner circumferential surface of the center shaft. A cylindrical valve body is provided with a tooth gear meshing with the planetary gear and arranged concentrically with the center shaft, and the rotation of the steering wheel is decelerated and transmitted to the valve body, and the maximum rotation of the valve body is controlled. A planetary gear mechanism provided to rotate one rotation or less on each left and right side, a valve casing into which the planetary gear mechanism is closely inserted, and a hole bored in the valve casing in series with each other in the circumferential width direction of the valve body. and a pressure input port and a return input port which are connected to a hydraulic pressure supply source, and which are bored in the valve casing in series with the circumferential width direction of the valve body at a position opposite to the input ports, and a rear wheel. Each output port communicates with the left and right pressure chambers of the steering actuator, and the outer peripheral surface of the above-mentioned valve body is provided in a ridge shape and is in oil-tight contact with the inner peripheral surface of the valve casing. It is curved in the circumferential direction to form an oil passage between the valve body and the peripheral surface, and to switch the state of communication between the input ports and the output ports according to the left and right rotational position of the valve body associated with steering operation. A directional control valve for a rear wheel steering device, comprising at least two annular protrusions formed as a directional control valve.