Assembly of toothed wheels for a bicycle

Patent metadata

Field	Value
Publication number	US-9550547-B2
Application number	US-18757708-A
Country	US
Kind code	B2
Filing date	Aug 7, 2008
Priority date	Aug 9, 2007
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

An assembly of toothed wheels of a bicycle has at least two toothed wheels of different diameter and at least one support member of at least one toothed wheel of the at least two toothed wheels on a component of a bicycle, like for example a free body of a hub for a rear bicycle wheel. The at least one support member is at least partially housed in at least one cavity of at least one other toothed wheel of the at least two toothed wheels. In this way, the distance between the toothed wheels is lower than the thickness of the support member of the toothed wheels themselves. The support member can thus maintain a strong resistant section at the attachment area to the respective toothed wheel. At the same time, it is possible to mount a greater number of sprockets on a free body of standard size.

First claim

What is claimed is:

1. Assembly of toothed wheels of a bicycle, comprising at least two toothed wheels of different diameter, a first annular support member fixed to a first toothed wheel of the at least two toothed wheels via a first fastener, the first annular support member is arranged coaxially on a component of the bicycle and supports the first toothed wheel of the at least two toothed wheels on the component of the bicycle, and the first annular support member and the first fastener are each at least partially-housed in at least one cavity of a second toothed wheel of the at least two toothed wheels, and a second annular support member is fixed to the second toothed wheel of the at least two toothed wheels and supports the second toothed wheel of the at least two toothed wheels on the component of the bicycle.

2. Assembly of toothed wheels according to claim 1 , wherein the first annular support member comprises a first substantially annular central portion and a plurality of first arms extending radially outwards from the first substantially annular central portion, each of the first arms comprising at least one first through hole for housing the first fastener, each of the first arms being at least partially housed in a respective cavity of the second toothed wheel.

3. Assembly of toothed wheels according to claim 2 , wherein each of the first arms is axially displaced by a predetermined amount, with respect to the first substantially annular central portion, towards the second toothed wheel.

4. Assembly of toothed wheels according to claim 2 , wherein the first toothed wheel comprises a plurality of first radial extensions facing inwardly, each of the first radial extensions comprising at least one second through hole aligned with the at least one first through hole for coupling with the first annular support member through the first fastener.

5. Assembly of toothed wheels according to claim 4 , comprising a third toothed wheel having a diameter different to that of the first toothed wheel and associated with the first annular support member on a same side as the first toothed wheel and in a more axially inner position with respect to the first toothed wheel, the third toothed wheel being at a predetermined distance from the first toothed wheel, and the third toothed wheel includes at least one third through hole aligned with the at least one first and second through holes for coupling with the first annular support member and with the at least one first toothed wheel through the first fastener.

6. Assembly of toothed wheels according to claim 5 , wherein the second annular support member comprises a second substantially annular central portion in abutment against the first substantially annular central portion at a first abutment plane and a plurality of second arms extending radially outwards from the second substantially annular central portion, each of the second arms comprising at least one fourth through hole for housing a respective second fastener, each of the second arms being at least partially housed in a respective cavity of the first toothed wheel, the first arms being angularly staggered with respect to the second arms in a circumferential direction.

7. Assembly of toothed wheels according to claim 6 , wherein each of the second arms is axially displaced by a predetermined amount, with respect to the second substantially annular central portion, towards the first toothed wheel, and the second toothed wheel is arranged on an opposite side to the first toothed wheel with respect to the first abutment plane.

8. Assembly of toothed wheels according to claim 6 , wherein the second toothed wheel comprises a plurality of second radial extensions facing inwardly, each of the second radial extensions comprising at least one fifth through hole aligned with the at least one fourth through hole for coupling with the second annular support member through the second fastener.

9. Assembly of toothed wheels according to claim 6 , wherein the second fastener comprises a substantially tubular body at least partially housed in a respective fourth hole and an intermediate portion projecting radially outwards and acting in abutment against the second toothed wheel on the opposite side to the second arm.

10. Assembly of toothed wheels according to claim 9 , comprising a fourth toothed wheel having a diameter different to that of the second toothed wheel and associated with the second annular support member on a same side as the second toothed wheel and in a more axially outer position with respect to the second toothed wheel, the fourth toothed wheel being at a predetermined distance from the second toothed wheel, and
wherein the fourth toothed wheel comprises a plurality of sixth through holes aligned with the at least one fourth through hole and at least one fifth through hole for coupling with the first annular support member and with the second toothed wheel through the second fastener, wherein the intermediate portion is operatively arranged between the fourth toothed wheel and the second toothed wheel.

11. Assembly of toothed wheels according to claim 9 , wherein the intermediate portion is circumferentially grooved.

12. Assembly of toothed wheels according to claim 9 , wherein each of the second arms comprises an abutment surface having generatrixes substantially parallel to a rotation axis of the assembly and acting in abutment on the intermediate portion and on the second toothed wheel.

13. Assembly of toothed wheels according to claim 6 , comprising a fourth toothed wheel having a diameter different to that of the second toothed wheel and associated with the second annular support member on a same side as the second toothed wheel and in a more axially outer position with respect to the second toothed wheel, the fourth toothed wheel being at a predetermined distance from the second toothed wheel.

14. Assembly of toothed wheels according to claim 13 , wherein the second toothed wheel comprises a plurality of second radial extensions facing inwardly, each of the second radial extensions comprising at least one fifth through hole aligned with the at least one fourth through hole for coupling with the second annular support member through the second fastener, and the fourth toothed wheel comprises a plurality of sixth through holes each aligned with the fourth and fifth through holes for coupling with the second annular support member and with the second toothed wheel through the second fastener.

15. Assembly of toothed wheels according to claim 13 , comprising a third annular support member that supports a fifth toothed wheel that comprises a third substantially annular central portion in abutment against the second substantially annular central portion on the opposite side to the first substantially annular central portion at a second abutment plane.

16. Assembly of toothed wheels according to claim 15 , wherein the second toothed wheel comprises a plurality of second radial extensions facing inwardly, each of the second radial extensions comprising at least one fifth through hole aligned with the at least one fourth through hole for coupling with the second annular support member through the second fastener, the fourth toothed wheel comprises a plurality of sixth through holes aligned with the fourth and fifth through holes for coupling with the first annular support member and with the second toothed wheel through the second fastener, and the third annular support member comprises a plurality of third arms extending radially outwards from the third substantially annular central portion, each of the third arms co

Assignees

• Valle Maurizio
• Campagnolo Srl

Inventors

• Valle Maurizio

Classifications

• B62M9/105

  involving front sprocket chain-wheels engaged by the chain, belt or the like · CPC title

• B62M9/10 Primary

  involving different-sized wheels, {e.g. rear sprocket chain wheels} selectively engaged by the chain, belt, or the like {(bicycle hubs rotatably arranged on axle B60B27/023)} · CPC title

• B62M9/12

  the chain, belt, or the like being laterally shiftable {, e.g. using a rear derailleur} · CPC title