JPH0454777U

JPH0454777U -

Info

Publication number: JPH0454777U
Application number: JP9732990U
Authority: JP
Priority date: 1990-09-17
Filing date: 1990-09-17
Publication date: 1992-05-11

Description

[Brief explanation of drawings]

第１図は本考案に係る四輪操舵用後輪アクチユ
エータを適用した四輪操舵車の一実施例を示す概
略構成図、第２図は従来の四輪操舵車の概略構成
図、第３図は第２図の油圧切換弁の特性図、第４
図は第２図のハンドル角とハンドル負荷との関係
を示す特性図である。１……前輪、２……後輪、３……パワーステア
リング装置、５……油圧切換弁、７……ハンドル
、８……出力軸、９……ラツク軸、２０……後輪
アクチユエータ、２１，２２……パワーシリンダ
、２３……ギヤ機構、２４……リンク機構、２５
……シリンダ軸、２５ａ……ラツク、２６，２６
′……復帰スプリング、２７……ウオーム、２８
……ウオームホイール、３０……リレーロツド。 Fig. 1 is a schematic configuration diagram showing an embodiment of a four-wheel steered vehicle to which the rear wheel actuator for four-wheel steering according to the present invention is applied, Fig. 2 is a schematic configuration diagram of a conventional four-wheel steered vehicle, and Fig. 3 is the characteristic diagram of the hydraulic switching valve in Fig. 2, and Fig. 4 is the characteristic diagram of the hydraulic switching valve.
The figure is a characteristic diagram showing the relationship between the steering wheel angle and the steering wheel load shown in FIG. 2. DESCRIPTION OF SYMBOLS 1... Front wheel, 2... Rear wheel, 3... Power steering device, 5... Hydraulic switching valve, 7... Handle, 8... Output shaft, 9... Rack shaft, 20... Rear wheel actuator, 21 , 22... Power cylinder, 23... Gear mechanism, 24... Link mechanism, 25
...Cylinder shaft, 25a...Rack, 26, 26
'... Return spring, 27... Worm, 28
...Worm wheel, 30...Relay rod.

Claims

[Scope of utility model registration request]

a first power cylinder that provides a rear wheel with a steering angle opposite to that of the front wheels; and a first power cylinder that is connected to one end of a cylinder shaft of the first power cylinder and has a smaller diameter than the first power cylinder and has a built-in return spring. a second power cylinder that applies a steering angle to the rear wheels in phase with the front wheels; a worm having one end provided with a gear that meshes with a rack carved on the other end of the cylinder shaft; and a worm that meshes with the worm. a gear mechanism having a worm wheel that rotates the worm wheel; one end is fixed to the shaft of the worm wheel, and the other end is fixed to a relay rod that is connected to the left and right rear wheels and gives a steering angle to these; 1. A rear wheel actuator for four-wheel steering, comprising a link mechanism that pushes a relay rod to the left or right depending on the movement of the relay rod.