Multi-pinion arrangement and bicycle drive having a multi-pinion arrangement of said type
AssigneeSRAM Deutschland GmbH
InventorAndreas Vonend
Life of this patent
Estimating the term…
Abstract
A bicycle drive includes a multi-sprocket arrangement for rotatable mounting on a rear-wheel axle an engagement with a bicycle chain having inner link plate pairs and chain outer link plate pairs. The multi-sprocket arrangement includes a sprocket having, between an axial inner side and an oppositely situated axial outer side, a flat sprocket body and a plurality of teeth formed on a circumference of the sprocket. The plurality of teeth include at least one tooth of a first tooth group, the axial width of which is dimensioned to be greater than a chain inner link plate spacing and smaller than a chain outer link plate spacing, and a second tooth group, the axial width of which are dimensioned to be smaller than the chain inner link plate spacing.
Claims18
A multi-sprocket arrangement for rotatable mounting on a rear-wheel axle and in an engagement with a bicycle chain having chain inner link plate pairs and chain outer link plate pairs, comprising:
- a sprocket having, between an axial inner side and an oppositely situated axial outer side, a flat sprocket body and a plurality of teeth formed on a circumference of the sprocket, the plurality of teeth comprising:
- a first tooth group, an axial width of which are dimensioned to be greater than a chain inner link plate spacing and smaller than a chain outer link plate spacing, and
- a second tooth group, an axial width of which are dimensioned to be smaller than the chain inner link plate spacing,
- wherein, when viewed in a circumferential direction, at least one sequence of three teeth is provided in which a tooth of the second tooth group, a tooth of the first tooth group and another tooth of the second tooth group are arranged directly in succession, and the tooth of the first tooth group has a projection in an axial direction, which is produced by a material deformation,
- wherein the entire flat sprocket body has an axial width which substantially corresponds to the axial width of the teeth of the second tooth group and is smaller than the axial width of at least one tooth of the first tooth group,
- wherein a fraction of teeth of the first tooth group in the total number of teeth amounts to less than 50%.
A bicycle drive comprising:
- a multi-sprocket arrangement for rotatable mounting on a rear-wheel axle and in an engagement with a bicycle chain having chain inner link plate pairs and chain outer link plate pairs, comprising:
- a sprocket having, between an axial inner side and an oppositely situated axial outer side, a flat sprocket body and a plurality of teeth formed on a circumference of the sprocket, the plurality of teeth comprising:
- a first tooth group, an axial width of which are dimensioned to be greater than a chain inner link plate spacing and smaller than a chain outer link plate spacing, and
- a second tooth group, an axial width of which are dimensioned to be smaller than the chain inner link plate spacing,
- wherein, when viewed in a circumferential direction, at least one sequence of three teeth is provided in which a tooth of the second tooth group, a tooth of the first tooth group and another tooth of the second tooth group are arranged directly in succession, and the tooth of the first tooth group has a projection in an axial direction, which is produced by a material deformation,
- wherein the entire flat sprocket body has an axial width which substantially corresponds to the axial width of the teeth of the second tooth group and is smaller than the axial width of at least one tooth of the first tooth group,
- wherein a fraction of teeth of the first tooth group in the total number of teeth amounts to less than 50%;
- a rear gear shift mechanism,
- exactly one front chain ring arrangement with at least one chain ring;
- and
- the bicycle chain configured to engage with the at least one chain ring and with the sprocket of the multi-sprocket arrangement.
A sprocket for use in a multi-sprocket assembly attachable to a rear wheel of a bicycle, the sprocket comprising:
- a flat sprocket body
- the flat sprocket body comprising an attachment portion configured for attachment to another sprocket of the multi-sprocket assembly, and
- a plurality of teeth formed on a circumference of the flat sprocket body, the plurality of teeth comprising:
- a first tooth group, an axial width of which are dimensioned to be greater than a chain inner link plate spacing and smaller than a chain outer link plate spacing, and
- a second tooth group, an axial width of which are dimensioned to be smaller than the chain inner link plate spacing,
- wherein, when viewed in a circumferential direction, at least one sequence of three teeth is provided in which a tooth of the second tooth group, a tooth of the first tooth group and another tooth of the second tooth group are arranged directly in succession, and the tooth of the first tooth group has a projection in an axial direction, which is produced by a material deformation,
- wherein the entire flat sprocket body has an axial width which substantially corresponds to the axial width of the teeth of the second tooth group and is smaller than the axial width of at least one tooth of the first tooth group,
- wherein a fraction of teeth of the first tooth group in the total number of teeth amounts to less than 50%.
Dependencies are inferred from the claim text.