Bicycle Rotor System Radial Cable Attachment
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Solution Overview
Problem
Existing rotor systems for bicycles, particularly those used in BMX freestyle and mountain bikes, face challenges in simplifying the attachment of Bowden cables and increasing cost-effectiveness, with complex attachment methods and a high number of parts contributing to these issues.
Innovation Solution
A rotor system with two transmission elements where the second transmission element's connection area is arranged radially inside the steerer tube, allowing for direct and tool-free attachment of Bowden cables, reducing the number of parts and simplifying assembly, and featuring a connecting element that is injection molded or pressed onto the cable end for secure and easy attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional attachment methods with holders and screws are used, then the Bowden cable can be securely attached to the transmission element, but the assembly process becomes complex and requires tools
Solution Approach 1:
The patent merges the holder and the transmission element into a single integrated component. The connection area is formed directly on the transmission element, eliminating the need for separate holders and reducing the total number of parts while maintaining secure attachment functionality
Solution Approach 2:
The transmission element serves multiple functions: it transmits mechanical motion and simultaneously provides the connection area for attaching the Bowden cable. This multi-functionality eliminates the need for separate attachment components, simplifying the overall structure
2Reliability
If traditional attachment methods with screws and holders are used, then the Bowden cable can be securely attached, but the assembly process becomes time-consuming and requires additional tools
Solution Approach 1:
The connection area is pre-formed as an integral part of the transmission element during manufacturing. This preliminary preparation eliminates the need for complex assembly operations, allowing the Bowden cable to be attached quickly and easily without requiring additional tools or time-consuming fastening procedures
Solution Approach 2:
The transmission element's integrated connection area serves as its own attachment mechanism, eliminating the need for separate holders, screws, or other fastening components. This self-service design simplifies the attachment process and reduces assembly time
3Ease of operation
If connection areas are arranged radially outside the steerer tube, then the transmission elements can be easily accessed, but the attachment process becomes more complex with additional intermediate components
Solution Approach 1:
The patent combines the connection area with the transmission element itself, forming an integrated structure. This merger eliminates the need for intermediate components such as holders or adapters, simplifying the attachment process while maintaining accessibility for cable routing and attachment operations
Data Source
Figure 1
Figure 2A~2D
Figure 3A~3E
AI summary
The invention relates to a rotor system for a bicycle (1), for the purpose of mounting a fork (8) and transmitting the actuations of Bowden cables (31, 32) which each have one core (31a, 32a). The rotor system comprises at least one first and one second transmission element (36, 37) that are able to be rotated relative to one another and are arranged in the region of the mounting (21, 23, 25) of the fork (8), said transmission elements (36, 37) comprising at least one annular region that is mounted on the steerer tube (12) of the fork (8) and is surrounded by a head tube (21) in at least the radial direction, and said transmission elements (36, 37) also comprising fastening regions (36b, 37b) for the direct or indirect attachment of the rotor-side ends of the cores (31a, 32a). In said rotor system, at least one of the transmission elements (37) comprises a fastening region (37b) to which a connecting element (32b) can be form-fittingly attached, said connecting element (32b) interacting with, or being integrally connected to, the rotor-side end of the core (32a) that is associated with said at least one transmission element (37).