Transmission device for gear switching, and human-powered vehicle comprising said device
OwnerPaolo MENICHETTIinventor
Life of this patent
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Abstract
The transmission (10) comprises a support (40) where an input central shaft (1) is rotatably supported. A central wheel (11) is integral with the central shaft (1) and rotates therewith. The transmission further comprises an output wheel (18) and a rotary unit (100) rotatably supported by the support (40) around a rotation axis (100′) to take a plurality of angular positions. Selectable gear pairs (101-109) are rotatably supported on the rotary unit (100). A rotation mechanism of the rotary unit (100) brings the rotary unit (100) into one of said angular position selectively. In each angular position of the rotary unit (100) a selectable gear pair (101-109) transmits motion from the central wheel (11) to the output wheel (18);
Claims26
A transmission comprising:
- a support for rotatably supporting an input central shaft;
- a central wheel integral with the central shaft and rotating therewith;
- an output wheel;
- a rotary unit rotatably supported by the support around a rotation axis to take a plurality of angular positions;
- a plurality of selectable gear pairs each of which gear pairs is rotatably mounted on the rotary unit;
- a rotation mechanism of the rotary unit adapted to bring selectively the rotary unit into one of said angular positions;
- wherein in each angular position of the rotary unit a respective one of said selectable gear pairs transmits motion from the central wheel to the output wheel;
- and wherein each selectable gear pair is configured to provide a different gear ratio between the central wheel and the output wheel.
A vehicle comprising:
- a frame;
- at least a drive wheel arranged rotatable on the frame and provided with a drive element;
- a transmission comprising:
- a support which is rigidly fastened to the frame;
- an input central shaft rotatably supported in said support;
- a central wheel integral with the central shaft and rotating therewith;
- an output wheel;
- a rotary unit rotatably supported by the support around a rotation axis to take a plurality of angular positions;
- a plurality of selectable gear pairs each of which is rotatably mounted on the rotary unit;
- a rotation mechanism of the rotary unit adapted to bring selectively the rotary unit into one of said angular positions;
- wherein in each angular position of the rotary unit a respective one of said selectable gear pairs transmits motion from the central wheel to the output wheel;
- and wherein each selectable gear pair is configured to provide a different gear ratio between the central wheel and the output wheel;
- members for transmitting torque to the central shaft;
- and
- a mechanical transmission configured to transmit motion from the output wheel of the transmission to the drive of the drive wheel.
Dependencies are inferred from the claim text.