DRUM MIXER DRIVE

摘要

The drive for rotating the drum of a vehicular cement mixer includes a mechanical power train mounted in a first chamber of a drive housing and a hydrostatic motor disposed in a second housing chamber substantially surrounded by yet another chamber defined in part by an outer wall of diecast aluminum formed on an outside surface with a plurality of outwardly extending fins and on an inside surface with a plurality of support plates connected to an inner housing well defining the inner chamber. The outer chamber communicates with the inner chamber by means of an overflow outlet at the top of the inner housing wall, oil escaping from the inner chamber via the outlet flowing down the support members to the inner surface of the outer housing wall. Heat from the oil is transferred through the outer housing wall and the fins to an airstream blowing past the same under the action of a blower driven by the hydrostatic motor, an air-flow guide extending from the blower to the fins for facilitating the motion of the air stream. The guide is provided with pivotable plates at the fins for facilitating the inspection and maintenance of the cooling surfaces. A hydraulic circuit connected to a sump at the bottom of the outer chamber energizes the hydrostatic motor and delivers oil to the first chamber for lubricating the mechanical train, the first chamber in turn communicating with the outer chamber for enabling the flow of oil from the first chamber to the sump.