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    • 10. 发明公开
    • STEERING DEVICE OF WHEEL LOADER
    • LENKVORRICHTUNGFÜREINEN RADLADER
    • EP2774827A1
    • 2014-09-10
    • EP12873379.7
    • 2012-04-19
    • Komatsu Ltd.
    • IMANISHI, KotaCHIKUGO, HiroyukiHORI, ShuujiAKASHI, MitsumasaHASEBE, AkiraAKUSHICHI, ShukiTAKAMATSU, Nobumasa
    • B62D5/28B62D5/07E02F9/20
    • E02F9/225B62D1/22B62D5/075B62D5/09B62D5/091B62D5/12B62D5/18B62D5/20B62D5/28B62D12/00E02F9/0841E02F9/2285E02F9/2296
    • A mechanism for prioritizing a handle operation is achieved with a simple configuration and the mechanism is actuated in a stable manner in a wheel loader in which steering can be operated by a handle operation and a lever operation. The steering device includes a handle (21), a joystick (22), steering cylinders (23L, 23R), a steering valve (25), a pump (30), an orbit roll (26) for supplying pilot pressure to the steering valve (25) according to a handle operation, a lever electromagnetic control valve (27) for supplying pilot pressure to the steering valve (25) according to a joystick operation, and a handle prioritization valve (28). The handle prioritization valve (28) shuts off pilot hydraulic pressure supplied to the steering valve (25) from the lever electromagnetic control valve (27) due to a differential pressure in a hydraulic circuit that is produced by operating fluid flowing through the orbit roll (26) during a handle operation.
    • 通过简单的结构实现了把手操作优先化的机构,并且机构以稳定的方式被驱动到轮式装载机中,其中转向可以通过手柄操作和杠杆操作来操作。 转向装置包括手柄(21),操纵杆(22),转向油缸(23L,23R),转向阀(25),泵(30),用于向转向装置提供先导压力的轨道辊 根据手柄操作的阀门(25),用于根据操纵杆操作向转向阀(25)提供先导压力的杠杆电磁控制阀(27)和手柄优先阀(28)。 手柄优先阀(28)由于通过操作流过轨道辊的流体而产生的液压回路中的压力差,从杠杆电磁控制阀(27)关闭供给到转向阀(25)的先导液压( 26)。