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US 10,378,630 B1Granted
Modular drive unit
AssigneeHydro-Gear Limited Partnership
InventorMichael L. Bennett
Life of this patent
Estimating the term…
Abstract
A hydrostatic transmission assembly includes a first housing member and a housing cap sealed to the first housing member to form a sump wherein a pump and motor are rotatably disposed. A pump mount is located in the sump and engaged to the housing cap. The housing cap also includes a motor mount for an axial piston motor, and hydraulic fluid passages for connecting the pump to the motor. A pocket is located in the housing cap to rotationally support a swash plate for the pump.
Claims17
A transmission assembly comprising:
- a housing comprising a first housing member joined to a second housing member to form an internal sump, wherein the first housing member comprises a first opening and an internal pocket, and the second housing member comprises:
- a motor running surface;
- a first kidney port disposed on the motor running surface;
- a second kidney port disposed on the motor running surface;
- a first fluid passage in fluid communication with the first kidney port;
- a second fluid passage in fluid communication with the second kidney port;
- and
- a second opening;
- a pump mount engaged with the second housing member and comprising:
- a pump running surface;
- a first projection engaged with the internal pocket;
- a third kidney port disposed on the pump running surface and in fluid communication with the first fluid passage;
- and
- a fourth kidney port disposed on the pump running surface and in fluid communication with the second fluid passage;
- a hydraulic pump disposed on the pump running surface and driven by a pump input shaft;
- and
- a hydraulic motor disposed on the motor running surface and driving a motor output shaft, wherein the motor output shaft extends through the first opening in the first housing member and through the second opening in the second housing member.
14 more elements
A transmission assembly comprising:
- a housing comprising a first housing member joined to a second housing member to form an internal sump, wherein the second housing member comprises:
- a motor running surface;
- a first kidney port disposed on the motor running surface;
- a second kidney port disposed on the motor running surface;
- a first fluid passage in fluid communication with the first kidney port;
- a second fluid passage in fluid communication with the second kidney port;
- and
- a pair of receiving ports;
- a pump mount engaged with the second housing member and disposed entirely within the internal sump, the pump mount comprising:
- a pair of connecting ports, each of the pair of connecting ports engaging one of the pair of receiving ports;
- a pump running surface;
- a third kidney port disposed on the pump running surface and in fluid communication with the first fluid passage through one of the pair of connecting ports and one of the pair of receiving ports;
- and
- a fourth kidney port disposed on the pump running surface and in fluid communication with the second fluid passage through another of the pair of connecting ports and another of the pair of receiving ports.
11 more elements
Dependencies are inferred from the claim text.