Patent ID: 9309647
Filing Date: 2016-04-12
CPC Classification: B62D,E02F

Claim Text:
1. A steering device for a wheel loader in which a front frame and a rear frame are pivotably coupled in a horizontal direction, the steering device comprising: a handle operated by rotation for steering; a lever operated by tilting for steering; a steering cylinder configured to pivot the front frame in relation to the rear frame by expansion and contraction; a steering valve configured to control a supply direction of operating fluid to the steering cylinder with pilot hydraulic pressure; a pump configured to supply operating fluid to the steering cylinder via the steering valve; a handle control valve configured to supply pilot hydraulic pressure in order to control the supply direction to the steering valve according to a rotation operation of the handle; a lever electromagnetic control valve configured to supply pilot hydraulic pressure in order to control the supply direction to the steering valve according to a tilting operation of the lever; a left pilot oil passage provided between the handle control valve and the steering valve; and a right pilot oil passage provided between the handle control valve and the steering valve; the handle prioritization valve including: