摘要:
A shift control apparatus for a hub transmission includes an axle defining an axle axis; a pawl support rotating member rotatably supported around the axle axis; a pawl rotatably supported to the pawl support rotating member; a biasing mechanism for biasing the pawl in a radial direction; and a pawl control rotating member for controlling a radial position of the pawl. One of the pawl support rotating member and the pawl control rotating member includes a location for coupling to a shift control mechanism, and the other one of the pawl support rotating member and the pawl control rotating member includes a location for coupling to an actuating member. A spring is provided for biasing the pawl support rotating member and the pawl control rotating member in a rotational direction relative to each other, and a stopper is provided for holding the pawl support rotating member and the pawl control rotating member in a rotational position relative to each other. The actuating member rotates the pawl support rotating member and the pawl control rotating member in an opposite rotational direction relative to each other when resistance from the shift control mechanism overcomes a biasing force of the spring.
摘要:
A sun gear apparatus includes an axle, a sun gear rotatably supported around the axle, and a sun gear guide ring disposed between an inner peripheral surface of the sun gear and the axle. The sun gear guide ring minimizes or eliminates looseness in the coupling between the sun gear and the axle.
摘要:
A seal for a bicycle transmission includes an annular housing and an annular seal member. The housing includes a side wall defining a plurality of circumferentially disposed slots. The seal member is retained to the housing and extends radially inwardly. The seal member is formed from a resilient material, and the housing is formed from a material that is more rigid than the seal member.
摘要:
A bicycle transmission includes a hub axle, a drive member rotatably mounted around the hub axle, a hub body rotatably mounted around the hub axle, and a planetary gear mechanism coupled between the drive member and the hub body for communicating rotational force from the drive member to the hub body through multiple rotational force transmission paths. The planetary gear mechanism includes a planet gear supported by a planet gear rack for rotation around the hub axle, and a ring gear engaging the planet gear. The ring gear includes a transmission pawl that can be displaced between a first position for transmitting rotational motion between the ring gear and the hub body and a second position for inhibiting the transmission of rotational motion between the ring gear and the hub body. A clutch is mounted around the hub axle, wherein the clutch is movable in the direction of a longitudinal axis of the hub axle for selecting a rotational force transmission path through the planetary gear mechanism and for selectively operating the transmission pawl. The clutch includes a first clutch member and a second clutch member capable of movement relative to each other in the direction of the axis of the hub axle. The first clutch member and the second clutch member move relative to each other in the direction of the axis of the hub axle when the drive member rotates in a first rotational direction for causing the transmission pawl to be in the first position for transmitting rotational motion between the ring gear and the hub body.
摘要:
A hub transmission with a coaster brake unit includes a hub axle, a drive member rotatably mounted around the hub axle, a hub body rotatably mounted around the hub axle, and a planetary gear mechanism coupled between the drive member and the hub body for communicating rotational force from the drive member to the hub body through multiple rotational force transmission paths. The planetary gear mechanism includes a planet gear supported by a planet gear rack for rotation around the hub axle, and a ring gear engaging the planet gear. The gear rack includes a depression formed in a peripheral direction thereof, and the ring gear includes a serration formed in a peripheral direction thereof. A clutch having an engagement component is movable in a direction of an axis of the axle between a first position and a second position. The engagement component engages with the depression in the gear rack for transmitting forward rotational power to the gear rack when the clutch is located in the first position, and the engagement component engages with the serration in the ring gear for transmitting forward rotational power to the ring gear when the clutch is located in the second position. A forcible movement device forcibly moves the clutch from the depression toward the serration when reverse rotational power is applied to the drive member.
摘要:
A continuously variable bicycle transmission includes a ring roller, a first conical planetary roller, a first carrier and a sun roller. The first conical planetary roller is frictionally engaged with the ring roller. The first carrier rotatably supports the first conical planetary roller. The sun roller is movable along an axis. The sun roller is frictionally engaged with the first conical planetary roller.
摘要:
A hub transmission for a bicycle comprises a hub axle; a driver rotatably supported to the hub axle; a hub shell rotatably supported to the hub axle; a power transmitting mechanism disposed between the driver and the hub shell for communicating rotational power from the driver to the hub shell through a plurality of power transmission paths; a shift mechanism for selecting the plurality of power transmission paths; a shift assist mechanism for communicating rotational power from the driver to the shift mechanism; and a power control mechanism disposed between the driver and the shift assist mechanism and coupling the driver to the shift assist mechanism for controlling an amount of rotational power communicated from the driver to the shift mechanism.
摘要:
A bicycle hub transmission includes an axle, a driving member rotatably supported on the axle, a slave rotatably supported on the axle, and a power transmitting mechanism disposed between the driving member and the slave for communicating rotational force from the driving member to the slave through a plurality of power transmitting paths. A clutch member is rotatably supported and axially movable on the axle for selecting one of the plurality of power transmitting paths of the power transmitting mechanism, and a shift key is provided for moving the clutch member axially. A shift rod is axially movably supported to the axle for moving the shift key axially, and a biasing mechanism is provided for biasing the clutch member toward the shift key. A link is provided for linking the clutch member to the shift key so that the clutch member is substantially axially immovable relative to the shift key. As a result, the shift key always moves with the clutch member.
摘要:
A shifting apparatus for controlling a change gear device winding or unwinding a cable. The shifting apparatus essentially includes a control member rotatable about a handlebar, a takeup drum for winding the cable thereon, a positioning mechanism for retains the takeup element in each angular position, and an indicator for indicating a speed stage of the change gear device. The indicator is formed separately from the control member and takeup drum, and has an axis different from a rotational axis of the control member. The indicator may be installed in any desired orientation determined freely without regard to orientations of the control member and takeup drum. The shifting apparatus, therefore, has the indicator which is small but easy to see.