F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
138/45
F04B 1/12 (2006.01)
Patent
CA 1071972
ABSTRACT OF THE DISCLOSURE This invention relates to a crawler type vehicle driving apparatus. The apparatus includes an axial plunger type hydraulic motor and a parking brake. A motor housing accommodates the hydraulic motor and a fixed frame fixedly retains the motor housing. A driven member is rotated by the hydraulic motor, and a control block is securely mounted on the motor housing. A control valve is securely mounted on the control block. In accordance with the invention, the motor housing has an annular flange portion formed on the outer periphery thereof, a peripheral face in engagement with the axial frame, and an additional peripheral face extending oppositely to the fixed frame and rotatably engaged with the driven member to have a diameter smaller than the peripheral face. The control block has on its outer periphery a flat outer peripheral face which extends in a plane substantially perpendicular to the rotational axis of the driven member, control valve is attached to the control block and the valve spool is substantially perpendicular to the rotational axis of the driven member. The maximum length of the control block is substantially perpendicular to the rotational axis of the driven member and is smaller than the diameter of the axial frame bore of the fixed frame.
323585
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