The present invention relates to a driving apparatus of a working vehicle, which has at least two wheels installed at each of both sides of a working vehicle body and is driven by a hydraulic motor part controlling hydraulic oil supplied by a hydraulic pump through a direction change valve to rotate the wheels. The wheels provided at each of both sides of the vehicle body are independently mounted on the vehicle body, and the hydraulic oil supplied through a common hydraulic power supply line at each of a left side and a right side is supplied to left and right hydraulic motor parts by selecting a stop position, a forward movement position and a backward movement position of the direction change valve with a joystick to selectively perform normal rotation and reverse rotation of the left and the right wheels so that the vehicle moves forwards and backwards and turns. Accordingly, the wheels on one side and the wheels on the other side of the working vehicle are rotated together forward and reversely by controlling driving control valves controlled by the joystick, to move the vehicle forwards and backwards and, in turning of the vehicle, the wheels on one side are rotated forward while the wheels on the other side are rotated reversely so that the turning radius of the vehicle wheels can be minimized, thereby realizing the turning very conveniently even in a narrow working environment. In addition, since two driving control valves for controlling the wheels on both sides are employed instead of a complex structure for individually changing directions of the wheels, a structure is simplified, thereby saving manufacturing costs.

    본 발명은 작업차량의 주행장치에 관한 것으로, 작업차량의 차체의 양측 각각에 적어도 두 개의 차륜들이 장착되어 있고, 유압펌프에 의해 공급되는 압유를 방향전환밸브를 통해 제어하여 상기 차륜들을 회전시키는 유압모터부로 구동하는 작업차량의 주행장치에 있어서, 상기 차체 양측 각각 제공된 차륜들은 각각 차체에 독립되게 장착되고, 좌측과 우측에 각각 공통의 유압공급라인을 통해 공급되는 압유를 조이스틱으로 방향전환밸브를 정지위치와 전진위치 및 후진위치에서 선택하여 좌측과 우측의 유압모터부로 공급하여 좌측과 우측 차륜들을 선택적으로 정회전과 역회전시켜 전후진 및 선회주행하도록 된 것을 특징으로 하여 구성됨으로써, 작업차량의 일측의 차륜들과 타측의 차륜들을 조이스틱으로 제어되는 주행컨트롤밸브들을 제어하여 함께 정역회전시켜 차량을 전후진시키고, 선회주행시에는 일측의 차륜들은 정회전하여 전진하는 한편 타측의 차륜들을 역회전시켜 차륜의 선회 회전반경이 최소화되게 선회주행할 수 있어 협소한 작업환경에서도 선회주행이 매우 간편하게 이루어지고, 차륜들을 개별적으로 방향전환시키는 복잡한 구조 없이도 양측의 차륜들을 제어하기 위한 두 개의 주행컨트롤밸브를 채용하여 구조를 단순화하여 제조비용을 절감할 수 있는 효과가 있다.


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    Title :

    TRAVEL DRIVE DEVICE FOR WORKING VEHICLES


    Additional title:

    작업차량의 주행장치


    Contributors:

    Publication date :

    2020-06-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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