Integrated hydrostatic transmission

摘要

An integrated hydrostatic transmission including a reservoir housing having at least two openings, wherein a pre-assembled motor module can be received in one of the openings for closing the opening, and a cover can be attached to the other opening for closing the opening. As a result, the motor can be mounted at a left or right side opening depending on which side of a zero-turn-radius mower or other vehicle the transmission is being mounted, and because the transmission is modular, the design provides for ease of service of both the hydraulic motor and a hydraulic pump.

主权项

1. An integrated hydrostatic transmission including:
a hydraulic pump module; a reservoir housing forming interiorly thereof a reservoir chamber for containing hydraulic fluid and a wall including at least one opening communicating interiorly with the reservoir chamber; a hydraulic motor module extending through the opening to close the opening and having an end port plate having inlet and outlet passages and one or more plates through which fluid flows from/to the inlet/outlet passages; and a center block mounted to the housing and having a motor mount surface located in the reservoir chamber having at least one port for communicating with the inlet and outlet passages in the end port plate and a pump mount surface located in the reservoir chamber having at least one port for communicating with the pump module; and at least one fastener extending through the center block, the end port plate and the one or more plates to secure the motor module relative to the housing.