Two-Part Clutch Locking Body for Gear Shifts Under Load
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Solution Overview
Problem
Existing gear mechanism units for vehicles powered by muscle power face challenges in performing gear changes under load, as high friction forces prevent reliable disengagement of gear stages, especially when a drive force is transmitted, making it difficult to disengage a gear stage during gear changes.
Innovation Solution
A coupling arrangement with a two-member locking body arrangement, comprising a locking body carrier and a locking body member, which can pivot against each other to simplify the disengagement of gear stages by canceling the coupling position, allowing for gear changes under load without interrupting the drive force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional locking body arrangement is used to engage into the coupling toothing system, then the gear stage can be locked in the coupling position, but high friction forces prevent reliable disengagement when drive force is transmitted
Solution Approach 1:
The locking body arrangement is divided into two separate members: a locking body carrier that engages with the coupling toothing system, and a locking body member that pivots on the carrier. This segmentation allows the disengagement force to be applied to the carrier rather than directly to the locking section, reducing the impact of friction forces and enabling reliable gear stage disengagement even when drive force is transmitted.
2Productivity
If gear changes are performed under load, then tractive power transmission can be maintained, but high friction forces make disengagement difficult
Solution Approach 1:
By separating the locking body arrangement into a carrier and a member, the disengagement operation can be performed on the carrier while the locking section remains engaged, allowing gear changes under load with continuous tractive power transmission.
Solution Approach 2:
The locking body carrier acts as an intermediary between the drive force transmission path and the locking body member. It allows the application of disengagement forces without directly interfering with the coupling toothing engagement, enabling smooth gear changes while maintaining drive force transmission.
3Device complexity
If a single-member locking body arrangement is used, then the structure is simple, but it cannot effectively cancel the coupling position for disengagement
Solution Approach 1:
The locking body arrangement is segmented into two members that can pivot relative to each other. This allows the locking body member to be positioned such that its driving section does not engage into the coupling toothing system, effectively canceling the coupling position and enabling disengagement.
Solution Approach 2:
The two members of the locking body arrangement are designed to pivot relative to each other, creating a dynamic structure that can transition between engaged and disengaged states. This dynamic capability allows effective cancellation of the coupling position for disengagement while maintaining structural simplicity.
Data Source
AI summary
A coupling arrangement for coupling members as a gear change coupling in a gear mechanism unit includes a first member and a second member. The first member has a coupling toothing system. At least one locking body arrangement is mounted pivotably on the second member. The locking body arrangement can be pivoted into a coupling position, in the case of which a driving section on the locking body arrangement engages into the coupling toothing system. The locking body arrangement can be pivoted into a release position, in the case of which the driving section of the locking body arrangement does not engage into the coupling toothing system. The locking body arrangement has a locking body carrier which is mounted pivotably on the second member, and has a locking body member which is mounted pivotably on the locking body carrier and on which the driving section is configured.