JPH0216366U

JPH0216366U -

Info

Publication number: JPH0216366U
Application number: JP9475488U
Authority: JP
Priority date: 1988-07-18
Filing date: 1988-07-18
Publication date: 1990-02-01

Description

[Brief explanation of drawings]

第１図〜第４図は本考案の第１の実施例を示し
、第１図は荷運搬車の油圧系統図、第２図は同平
面図、第３図は同側面図、第４図は同正面図、第
５図〜第８図は第２の実施例を示し、第５図は操
舵装置の油圧系統図、第６図はクツシヨンシリン
ダの縦断面図、第７図は前輪および後輪の切れ角
を示すグラフ、第８図は操舵切換用バルブの作動
電気回路、第９図は従来の四輪操舵装置の油圧系
統図である。７Ａ，７Ｂ…前輪ナツクル、８Ａ，８Ｂ…後輪
ナツクル、１１Ａ，１１Ｂ…前輪、１２Ａ，１２
Ｂ…後輪、２３…荷役操舵用油圧ポンプ、２５…
オービツトロール装置、２６Ａ，２６Ｂ…前輪操
向用シリンダ、２８…前輪操舵用油圧回路、３０
…後輪操舵用油圧回路、３１Ａ，３１Ｂ…従動ア
ーム、３２Ａ，３２Ｂ…従動用シリンダ、３３Ａ
，３３Ｂ…ナツクルアーム、３４Ａ，３４Ｂ…後
輪操向用シリンダ、３６…連動機構、３７Ａ，３
７Ｂ…連動アーム、３８Ａ，３８Ｂ…連動用シリ
ンダ、３９…接続管、５１…クツシヨンシリンダ
。 Figures 1 to 4 show a first embodiment of the present invention, in which Figure 1 is a hydraulic system diagram of a cargo carrier, Figure 2 is a plan view of the same, Figure 3 is a side view of the same, and Figure 4 is a diagram of the hydraulic system of the cargo carrier. 5 to 8 show the second embodiment, FIG. 5 is a hydraulic system diagram of the steering system, FIG. 6 is a vertical sectional view of the cushion cylinder, and FIG. 7 is a front view of the front wheels and FIG. 8 is a graph showing the turning angle of the rear wheels, FIG. 8 is an operating electric circuit of a steering switching valve, and FIG. 9 is a hydraulic system diagram of a conventional four-wheel steering system. 7A, 7B...Front wheel nut, 8A, 8B...Rear wheel nut, 11A, 11B...Front wheel, 12A, 12
B...Rear wheel, 23...Hydraulic pump for cargo handling steering, 25...
Orbitroll device, 26A, 26B...Cylinder for front wheel steering, 28...Hydraulic circuit for front wheel steering, 30
... Hydraulic circuit for rear wheel steering, 31A, 31B... Driven arm, 32A, 32B... Driven cylinder, 33A
, 33B... Knuckle arm, 34A, 34B... Rear wheel steering cylinder, 36... Interlocking mechanism, 37A, 3
7B... Interlocking arm, 38A, 38B... Interlocking cylinder, 39... Connection pipe, 51... Cushion cylinder.

Claims

[Scope of Claim for Utility Model Registration] 1. A pair of left and right front wheel steering cylinders connected via a knuckle arm to a front wheel nut that supports the left and right front wheels, and a pair of left and right front wheel steering cylinders connected via a knuckle arm to a rear wheel nut that supports the left and right rear wheels. In a vehicle steering system including a pair of connected left and right rear wheel steering cylinders, a front wheel steering hydraulic circuit is provided that connects a hydraulic pressure generating device, a steer valve, and the front wheel steering cylinder; A pair of left and right driven cylinders are provided which are respectively connected to the rear wheel steering cylinder and linked to the front wheel steering cylinder, and these driven cylinders and the rear wheel steering cylinder are connected via a steering switching valve. A vehicle steering device characterized by being provided with a hydraulic circuit for steering. 2. Left and right wheels that are rotatable around a king pin are provided on the left and right frames arranged with a certain space between each other via a knuckle, and the left and right wheels are rotated via a knuckle arm on the knuckle. The left and right wheels are provided with an interlocking mechanism that mutually interlocks the rotation by the steering cylinder, and this interlocking mechanism is connected to an interlocking arm attached to the knuckle and each of these interlocking arms. 1. A steering system for a vehicle, comprising: an interlocking cylinder; and a connecting pipe connecting the interlocking cylinders so that the left and right wheels rotate in the same direction. 3. A steering system for a vehicle according to claim 1, characterized in that a cushion cylinder is connected across a hydraulic circuit connecting a steering switching valve and both rear wheel steering cylinders.