Sprocket assembly
The sprocket assembly addresses misalignment issues in bicycle chainring assemblies by using alignment elements to securely attach and align sprockets, enhancing performance and reducing maintenance through precise, lightweight, and uncomplicated design.
DE102018009525B4Active Publication Date: 2026-06-03SRAM LLC
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- SRAM LLC
- Filing Date
- 2018-12-04
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Existing bicycle chainring assemblies suffer from misalignment issues, leading to shifting difficulties, chain derailment, and premature wear, and there is a need for a lightweight, uncomplicated, and effectively aligned sprocket assembly.
Method used
A sprocket assembly design featuring a first sprocket with external mounting elements and internal second sprocket, aligned using alignment elements that engage through openings in both sprockets and a carrier, ensuring precise alignment and attachment without complex threading.
Benefits of technology
The design enhances bicycle performance by reducing maintenance needs, improving shifting accuracy, and maintaining consistent gear ratios through robust, lightweight, and simplified sprocket alignment.
✦ Generated by Eureka AI based on patent content.
Smart Images
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Abstract
Sprocket assembly (40) for a bicycle (10), wherein the sprocket assembly (40) comprises: a first chain wheel (52) configured to rotate about an axis of rotation (L) of the bicycle (10); a mounting element (60) comprising a plurality of engagement elements (128) which are fixed in relation to it on associated, interconnected mounting arms (122) of the mounting element (60) and are arranged on the outside of the first sprocket (52); a second sprocket (54) arranged on the inside of the first sprocket (52); and a plurality of alignment elements (58) which engage with the plurality of engagement elements (128) through a plurality of first openings (64) in the first sprocket (52) and a plurality of second openings (80) in the second sprocket (54); wherein each of the plurality of alignment elements (58) comprises an alignment feature configured to engage directly radially with each of the plurality of first openings (64) and the plurality of second openings (80); and wherein the sprocket assembly (40) further comprises a carrier (56) arranged between the first and second sprockets (52, 54), wherein the carrier (56) comprises a plurality of third openings (88), and wherein the plurality of third openings (88) is configured to engage directly radially with the alignment feature of each of the plurality of alignment elements (58).
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