SUN RACE STURMEY-ARCHER INC. Patent applications |
Patent application number | Title | Published |
20130327171 | TRANSMISSION CAPABLE OF MULTI-SPEED GEAR-SHIFTING BY REVERSE MOTION - A transmission particularly for bicycles, which is capable of multi-speed gear-shifting by means of reverse rotation and comprises: a transmission axle rotatable in both positive and reverse directions, a speed-changing gear set, a speed-changing cam set, and a transmission seat. The speed-changing gear set comprises a plurality of transmission gears and speed-changing gears which are respectively engaging with the transmission gears. When the transmission axle rotates reversely, the speed-changing cam set can be driven in order to control and decide which transmission gear of the speed-changing gear set is to be engaged and driven by the transmission axle during positive rotation, so as to achieve the feature of multi-speed gear-shifting by means of reverse rotation. | 12-12-2013 |
20120100948 | SPEED CHANGING APPARATUS - A speed changing apparatus includes a planet gear set having a sun gear, planet pinions, a planet pinion carrier and a ring gear mounted inside a rotary sleeve. The sun gear is driven by a D.C. motor to rotate in either of two opposed rotary directions. Clutch arrangements are operative to lock one of either the carrier arm or the ring gear to a rotationally fixed component and to drivingly couple the other of the carrier arm and the ring gear to the sleeve ring depending on the direction of rotation of the motor. Different gear ratios are selected by reversing the direction of rotation of the motor whilst the sleeve ring is always driven in same direction. The speed change apparatus may be part of a hub of an electric vehicle in which the sleeve ring is a hub shell and the apparatus is mounted about an axle. | 04-26-2012 |
20110034283 | SPEED CHANGE MECHANISM - A speed change mechanism in which the gear ratio is selected by changing the direction of rotation of the power input includes first and second planetary gear sets enclosed within a hub shell. A DC electric motor is coupled to the sun gears of both gear sets and drives them simultaneously in the same rotary direction. In one of the gear sets the carrier arm is fixed and the ring gear is the output and in the other gear set the ring gear is fixed and the carrier arm is the output. A first one-way clutch transmits drive from an output of the first gear set to the hub shell and second one-way clutch transmits drive from an output of the second gear set to the hub shell, both clutches operating in the same direction. The outputs of the gear sets are driven in opposite rotary directions so that drive is transmitted to the hub shell either through the first gear set or the second gear set depending on the direction of rotation of the power input to provide two different gear ratios. | 02-10-2011 |
20100304913 | SPEED CHANGE MECHANISM - A speed change mechanism | 12-02-2010 |