초록 ▼

A two-speed centrifugally shifted automatic transmission provides an overdrive output shaft rotational speed that may be three times the rotational speed of the input shaft (12). A shift point at a partial speed may provide a direct drive through an overrunning clutch (33). A spline mounted shift en

A two-speed centrifugally shifted automatic transmission provides an overdrive output shaft rotational speed that may be three times the rotational speed of the input shaft (12). A shift point at a partial speed may provide a direct drive through an overrunning clutch (33). A spline mounted shift engagement ring (46) is adapted to slide axially within housing (10) to restrain planet carrier ring (36) from rotating at start-up. After reaching a predetermined input shaft rotational speed, the shift engagement ring (46) moves to its extreme left position (FIG. 1), thereby allowing the planet carrier ring (36) to rotate and the rotational speed of the output shaft (14) to be driven by the overrunning clutch (33).

대표청구항 ▼

A two speed transmission comprising: an input shaft having a drive sun gear adapted to rotate about an axis; an output shaft having a driven sun gear; a planetary gear assembly having a planet carrier supporting a shaft containing a plurality of gears for engagement with said drive and driven sun ge

A two speed transmission comprising: an input shaft having a drive sun gear adapted to rotate about an axis; an output shaft having a driven sun gear; a planetary gear assembly having a planet carrier supporting a shaft containing a plurality of gears for engagement with said drive and driven sun gears respectively; a clutch which prevents the output shaft from rotating at a rotational speed less than the instantaneous rotational speed of the input shaft; and a speed change mechanism including a non-rotating slide member which axially shifts in response to input shaft speed between a first axial position and a second axial position, said first axial position being effective to engage the planet gear carrier to prevent rotation of the planet gear carrier thereby to drive the output shaft at a rotational speed greater than the rotational speed of the input shaft, and said second axial position being effective to allow said planet gear carrier to rotate freely and the clutch to drive the output shaft at the rotational speed of the input shaft.