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US 9,758,217 B2Granted
Derailleur of a bicycle gearshift and method for electronically controlling a bicycle gearshift
AssigneeCampagnolo S.r.l.
InventorsAlberto Bortoli, Gianluca Bortolozzo, Paolo Pasqua
Life of this patent
Estimating the term…
Abstract
A bicycle derailleur for operating a chain guide. The derailleur has primary actuator that imparts a primary displacement on the chain guide that has at least a component in an axial direction with respect to an assembly of toothed wheels. The derailleur also has secondary actuator that imparts a secondary displacement on the chain guide that has at least a component in a radial direction with respect to the assembly of toothed wheels. The secondary actuator can operate independently of the primary actuator.
Claims13
A derailleur of a bicycle gearshift, comprising:
- a support unit, configured to be mounted on a bicycle frame at an assembly of coaxial toothed wheels, the support unit includes a first fixing unit that has a support body and a chain tensioning spring being rotatably assembled on a pivot;
- a mobile unit, comprising a chain guide;
- a primary actuation means configured to move the mobile unit with respect to the support unit so as to impart onto the chain guide a primary displacement having at least a component in an axial direction with respect to an axis (Z) of the assembly of toothed wheels;
- and,
- a secondary actuation means configured to move the mobile unit with respect to the support unit so as to impart onto the chain guide a secondary displacement having at least a component in a radial direction with respect to the axis (Z) of the assembly of toothed wheels,
- wherein the secondary actuation means are capable of moving the mobile unit independently of the primary actuation means and the secondary actuation means comprise a linkage for adjusting a preload of the chain tensioning spring, and
- the first fixing unit comprising a first ring rotatably mounted on the pivot, provided with a tooth for resting on the bicycle frame and with a seat in engagement with a first end of the chain tensioning spring;
- and,
- the linkage for adjusting the preload of the chain tensioning spring comprises:
- a second ring rotatably assembled in the support body and on the pivot, provided with a seat in engagement with a second end of the chain tensioning spring;
- a toothed sector formed on the second ring;
- and,
- a worm screw in engagement with the toothed sector.
10 more elements
A derailleur of a bicycle gearshift, comprising:
- a support, configured to be mounted on a bicycle frame at an assembly of coaxial toothed wheels, that supports a mobile chain guide, the support includes a first fixing unit that has a support body and a chain tensioning spring being rotatably assembled on a pivot;
- a primary actuator for moving the chain guide through a primary displacement having a component in an axial direction with respect to an axis (Z) of the assembly of toothed wheels;
- and,
- a secondary actuator for moving the chain guide through a secondary displacement having at least a component in a radial direction with respect to the axis (Z) of the assembly of toothed wheels,
- wherein the secondary actuator is capable of moving the chain guide independently of the primary actuator and the secondary actuator comprises a linkage for adjusting a preload of the chain tensioning spring, and
- the first fixing unit comprising a first ring rotatably mounted on the pivot, provided with a tooth for resting on the bicycle frame and with a seat in engagement with a first end of the chain tensioning spring;
- and,
- the linkage for adjusting the preload of the chain tensioning spring comprises:
- a second ring rotatably assembled in the support body and on the pivot, provided with a seat in engagement with a second end of the chain tensioning spring;
- a toothed sector formed on the second ring;
- and,
- a worm screw in engagement with the toothed sector.
9 more elements
Dependencies are inferred from the claim text.