JPH0434176U

JPH0434176U -

Info

Publication number: JPH0434176U
Application number: JP7736790U
Authority: JP
Priority date: 1990-07-19
Filing date: 1990-07-19
Publication date: 1992-03-19

Description

[Brief explanation of drawings]

第１図〜第３図は本考案の一実施例を示し、第
１図はステアリング装置の油圧回路図、第２図は
同電気回路図、第３図ａ〜ｃはそれぞれ各操舵モ
ードの動作説明図、第４図ａ〜ｃはそれぞれ従来
の各操舵モードの動作説明図である。６……前輪側オービツトロール装置、７……後
輪側オービツトロール装置、８……前輪操舵用油
圧管、９……前輪、１０Ａ，１０Ｂ……前輪側ス
テアシリンダ、１１……後輪操舵用油圧管、１２
……後輪、１３Ａ，１３Ｂ……後輪側ステアシリ
ンダ、１４……操舵モード切換バブル、１６……
操向切換バルブ、１８……前後進切換スイツチ、
２５……ステアリングハンドル。 Figures 1 to 3 show an embodiment of the present invention, Figure 1 is a hydraulic circuit diagram of the steering device, Figure 2 is an electrical circuit diagram thereof, and Figures 3 a to c are operations in each steering mode. The explanatory diagrams and FIGS. 4a to 4c are explanatory diagrams of the operation of each conventional steering mode, respectively. 6...Front wheel side orbit control device, 7...Rear wheel side orbit control device, 8...Hydraulic pipe for front wheel steering, 9...Front wheel, 10A, 10B...Front wheel side steer cylinder, 11...Rear wheel Steering hydraulic pipe, 12
... Rear wheel, 13A, 13B ... Rear wheel side steer cylinder, 14 ... Steering mode switching bubble, 16 ...
Steering switching valve, 18... Forward/forward switching switch,
25... Steering handle.

Claims

[Scope of utility model registration request]

A steering mode switching valve that can switch between two-wheel steering mode and out-of-phase and in-phase four-wheel steering modes is installed in the rear-wheel steering hydraulic pipe connected from the rear-wheel orbit device to the rear-wheel steering cylinder. , a front wheel steering hydraulic pipe connected from the front wheel orbit device to the front wheel steering cylinder is equipped with a steering switching valve that can switch the connection to the left and right front wheel steering cylinders in the forward or reverse direction. When the switch is in the reverse position, the steering mode switching valve is operated.When the steering mode switching switch is in the two-wheel steering position and the different-phase four-wheel steering position, the steering switching valve is switched to the opposite side, and the steering mode switching switch is in the different-phase four-wheel steering. A steering device for an industrial vehicle, characterized in that the steering switching valve is configured to switch to an in-phase four-wheel steering position when the steering control valve is in the same-phase four-wheel steering position.