1. Field of the Invention
The present invention relates to a hydraulic steering mechanism for steering drive wheels by utilizing hydraulic pressure.
2. Related Art
There is conventionally known a hydraulic steering mechanism for steering a pair of drive wheels by connecting a pair of steering cases that are disposed at both ends of an axle case through a tie rod and by turning one of the steering cases about a kingpin shaft by a hydraulic actuator.
However, in the conventional hydraulic steering mechanism, sufficient consideration has not been given to a viewpoint of a reduction in steering force of the hydraulic actuator.
The present invention has been accomplished with the above conventional technique in view, and it is an object of the invention to provide a hydraulic steering mechanism with a simple structure in which a hydraulic actuator for turning a steering case about a kingpin shaft can be miniaturized.