Deere + Company

Peter D Wetrich

Volker D Huckler

Gordon L Marquart

Vasile A Benedek

Mark A Herman

John J Gallen

Mark J Tieszen

James O Troemner

William A Volz

A work vehicle transmission has a disconnect device control assembly. The assembly includes a shaft having a rotation axis extending through a housing of the transmission. A disconnect device is mounted for co-rotation with the shaft about the rotation axis and has disengaged and engaged conditions. A gear is carried by the shaft to rotate about the rotation axis. The gear interacts with the disconnect device to rotate relative to the shaft in the disengaged condition and to co-rotate with the shaft in the engaged condition. A manifold is carried by the shaft and rotationally fixed relative to the rotation axis. The manifold defines a plurality of flow passages configured to route flow to the disconnect device. The manifold has an inner periphery that engages the shaft at a journal interface, which defines a flow passage for flow to pass from at least one of the flow passages of the manifold to the disconnect device.

Work vehicle transmission disconnect device control with shaft mounted manifold

A hydraulic control circuit controls flow of cooling oil to a wet clutch. The circuit normally maintains a reduced or zero flow, but temporarily increases flow of cooling oil when the clutch changes from a disengaged to an engaged state.

Clutch lube control

A park-lock mechanism for a vehicle equipped with a transmission operatively controlled by a pair of shift levers. One of the shift levers is a range selector shift lever and the other is a gear speed shift lever. The park-lock mechanism is comprised of a spring-loaded capsule positioned on the range selector shift lever, and an interlocking mechanism which is mounted adjacent to both of the shift levers. The spring-loaded capsule provides a means for preloading the range selector shift lever into the park position only when the interlocking mechanism has the transmission positioned in its lowest gear speed.

Park-lock mechanism

A tractor transmission is synchronized between four different speeds in each of two different high and low ranges and a reverse range. A top shaft coupled to be driven by the tractor engine has four different gears which are concentrically and rotatably spaced along the length thereof in constant mesh with a different one of a second group of four gears formed on the outer surface of a counter shaft. The counter shaft is selectively coupled to the top shaft by either of two pairs of synchronizers concentrically mounted on the top shaft between different pairs of the first four gears. High and low ranges are respectively provided by a first splined collar capable of coupling the counter shaft directly to a differential drive shaft and a second splined collar capable of coupling the differential drive shaft to the fourth gear disposed about the top shaft via a low range driven gear. Upon loss of hydraulic fluid pressure, a planetary gear arrangement coupled between the top shaft and the tractor engine is automatically returned from a direct drive condition to an underdrive condition by mechanical springs within two different clutches associated therewith. Similar safety features are provided in connection with the front wheel drive portion of the transmission.

Synchronized transmission

A mechanical transmission which includes a first speed change section optionally providing a direct drive or an underdrive, a second speed change section driven by the first section and optionally providing a plurality of forward and reverse speed ratios, separate control levers for the first and second sections movable on a common axis, one lever being movable between two positions to condition the first section for direct drive when in one position and for underdrive when in the other position, the second lever being movable to a plurality of positions to condition the second section for one of its speed ratios in each position, and interlock means acting between the two levers to prevent movement of the levers for conditioning the second section for its higher ratios when the first section is conditioned for underdrive and to prevent conditioning of the first section for underdrive when the second section is conditioned for any one of its higher ratios.

Growing community of inventors

Cedar Falls, IA, United States of America

Peter D Wetrich