Transmission and range box control
AssigneeDana Corporation
InventorTerry L. Jester
Life of this patent
Estimating the term…
Abstract
A transmission range selection device for use with a vehicle transmission having a main gear box and auxiliary two-speed gear box provides control over both with a single, conventional shift lever. The shift lever is pivotally mounted in the tower of the main transmission which is fitted with a switch. Shift forks associated with the main gear box shift rails are conventional except for that fork associated with the highest speed gears which has an extended throat, permitting shift lever movement into positions adjacent and beyond the positions associated with the highest gears of the standard shift pattern. When moved to these additional shift positions, the shift lever selects the highest gears of the transmission and activates the switch which in turn shifts the auxiliary gear box from its lower range to its higher range.
Claims20
A gear ratio selection device for use with a transmission assembly comprising, in combination, a main gear box having an input shaft, an output shaft, a plurality of gear sets providing a plurality of independently selectable gear ratios between said input shaft and said output shaft, a pivotally disposed shift lever, at least one shift rail, a shift yoke secured to said shift rail and including a slot for receiving a portion of said shift lever, a pair of aligned, spaced-apart, stationary guide means for limiting movement of said shift lever along a first path and a second path parallel to said first path while said portion of said shift lever is disposed within said slot, auxiliary gear box means in tandem with said main gear box for providing at least two selectable gear ratios, control means activated by said shift control lever for selecting of one of said auxiliary gear box ratios when said shift lever is disposed along said first path and selecting the other of said two gear ratios when said portion of said shift lever is along said path.
A transmission and range box control for use with a main transmission having a plurality of gear sets providing a plurality of independently selectable gear ratios between an input shaft and an output shaft and an auxiliary range box disposed in tandem with said main transmission having two selectable gear ratios comprising, in combination, a pivotally disposed shift lever, at least one shift rail, a shift yoke secured to said shift rail and defining a slot means for receiving a portion of said shift lever, a pair of aligned, spaced-apart, stationary guide means for limiting movement of said shift lever along and a first path and a second path parallel to said first path when said shift lever portion is engaged in said slot, sensor means for sensing the position of said shift control in one of said first and said second paths and providing a corresponding output indication and operator means coupled to said sensor means for selecting one of said two selectable gear ratios of said auxiliary range box.
In a transmission assembly having a main gear box having a housing, an input shaft, an output shaft, a plurality of gear sets providing a plurality of independently selectable gear ratios between said input shaft and said output shaft, a shift lever pivotally disposed in said housing, at least one shift rail slidably disposed in said housing, and an auxiliary range box in tandem with said main gear box providing two selectable gear ratios, the improvement comprising, a shift yoke secured to said shift rail and defining a slot for receiving a portion of said shift lever, a pair of aligned, spaced-apart, stationary guide means for confining movement of said movement lever along a pair of parallel shift paths when said shift lever is disposed within said slot, means secured to said shift lever for engaging said guide means, a two position sensor means for sensing the position of said shift control in one of said first and said second paths and providing a corresponding output indication and operator means coupled to said sensor means for selecting one of said two selectable gear ratios of said auxiliary range box.
Dependencies are inferred from the claim text.