Shifting device for multi-speed transmissions for bicycles and transmission arrangements with such a shifting device

The shifting device for multi-speed bicycle transmissions addresses the challenge of complex synchronization and space constraints in type 2 couplings by using a disc-like element and superimposed steering gears, enabling compact and efficient gear shifting.

DE102024002359B4Active Publication Date: 2026-02-12EISENBEIL ECKHARDT
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Patent Information

Application Number
DE102024002359
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-07-19
Publication Date
2026-02-12
Estimated Expiration
2044-07-19

AI Technical Summary

Technical Problem

Existing multi-speed bicycle transmissions with type 2 couplings face challenges in implementing power-transmitting shifting means that are in motion during operation, requiring complex synchronization and increased installation space.

Method used

A shifting device for multi-speed bottom bracket gearboxes with type 2 couplings, utilizing a disc-like input or output element that minimizes axial installation space and allows for compact shifting of gear elements without direct contact with an input or output shaft, using superimposed steering gears and planetary sets for synchronized gear changes.

Benefits of technology

Enables compact, efficient, and synchronized gear shifting with reduced installation space requirements and minimized noise, suitable for both manual and electrically assisted cycling.

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Abstract

The invention relates to a switching device for a multi-speed transmission for bicycles and multi-speed transmissions based on this switching device with at least one rotating transmission element in driving mode, which is designed as a disc (6b, 6c), a plurality of switching means (81b, 82b, 83b, 81c, 82c, 83c) which are mounted in the disc (6b, 6c), and a switching disc (5b, 5c) which is arranged concentrically to the disc (6b, 6c) and rotatably about the common axis of rotation. Due to the relative rotation between disc (6b, 6c) and shift disc (5b, 5c), depending on the selected gear, at least two transmission components (71b, 72b, 73b, 71c, 72c, 73c) are sequentially connected to the disc (6b, 6c) via the shift means (81b, 82b, 83b, 81c, 82c, 83c) in a rotationally fixed manner.
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Citation Information

Patent Citations

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    DE102009060484A1

  • electric bicycle with pedal force-based propulsion system

    DE102015120224A1

  • Multi-gear transmission for bicycles

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  • US000011772745B2