Doosan Corporation Mottrol
Travek device
[DM Series]
The travel device ˇ°DM Seriesˇ± from the Doosan Corporation Mottrol is currently broadening its global presence. The travel device series is designed for construction machines such as excavators, drilling machines, cranes etc. The motor is a case-rotation, high-torque motor which can be installed inside of the construction machines by connecting sprocket with motor case.
The travel device has a variable displacement (two speeds) swash plate and incorporates a brake valve and a mechanical brake needed for travelling. The travel device with planetary reduction gear offers outstanding features. Hydraulically balanced piston motor ensures reliable changeover of the displacement by external pilot control.
The motor offers speed control and braking to minimize shock with a built-in counterbalance valve and shockless relief valve. The mechanical brake is a negative. The brake is automatically activated or released when the stop or start. The case rotation type gear reducer has improved durability and reliability because of its simple and equally loaded design in addition to high-precision machine parts.
The motor uses heavy duty bearing to ensure long life. An efficient floating seal also prevents dust and water from entering the motor.