초록 ▼

A zero backlash shiftable transmission includes an input shaft and an output shaft coupled through a gear network that is preloaded with a spring arrangement to eliminate the backlash from the engaged surfaces of the gear teeth. There are three positions and no neutral. In the first position a taper

A zero backlash shiftable transmission includes an input shaft and an output shaft coupled through a gear network that is preloaded with a spring arrangement to eliminate the backlash from the engaged surfaces of the gear teeth. There are three positions and no neutral. In the first position a tapered clutch arrangement engages the input shaft directly with the output shaft. In the second or shift position, the clutch engages both the input shaft and the output shaft while the transmission is slowed or stopped for shifting. In the third position, the clutch engages the input shaft with the output shaft through the preloaded gear network. The tapered clutch arrangement provides locked clutch coupling in the first and third positions and provides tolerance for shifting without completely releasing either the input shaft or the output shaft in the shift position.

대표청구항 ▼

A zero backlash shiftable transmission, comprising: an input gear mounted on an input shaft and an output gear mounted on an output shaft, one of said gears rotatably mounted on its shaft as a free gear and the other gear fixed to its shaft as a fixed gear; countershaft assembly means having gears m

A zero backlash shiftable transmission, comprising: an input gear mounted on an input shaft and an output gear mounted on an output shaft, one of said gears rotatably mounted on its shaft as a free gear and the other gear fixed to its shaft as a fixed gear; countershaft assembly means having gears meshed with said input gear and said output gear and including anti-backlash means for forming a zero backlash gear train between said input gear and said output gear; tapered pocket portions in said input gear and said output gear; pocket wheel means on the input shaft or output shaft and having tapered pocket portions for forming tapered input pockets with the tapered pocket portions in the input gear and tapered output pockets with the tapered pocket portions in the output gear; shiftable clutch means having tapered lock heads, some extending toward the input pockets and some extending toward the output pockets and constructed and arranged so that drive is transferred directly from said input shaft to said output shaft when the lock heads are seated in the pockets formed by the fixed gear, and drive is transferred through the gear train when the lock heads are seated in the pockets formed by the free gear, the tapered lock heads maintaining engagement with both the tapered input pockets and tapered output pockets during shifting.