Quick-Release Lever Structure With Short-Travel Tooth Engagement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional bicycle quick release structures face safety and aesthetic issues due to unsuitable handle positioning and require a longer travel distance for operation, leading to operational difficulties.
Innovation Solution
A quick release structure featuring a rod member with spaced teeth, an arm member with a sleeving portion, and a restriction member, allowing for easy adjustment and engagement with a short operational travel distance through staggered tooth engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the teeth for engagement are distributed on a large region to have sufficient area, then the engagement area and driving effect are sufficient, but the handle portion has to be moved for a relatively longer travel distance for disengaging the handle portion and the shaft, which causes difficulty for operation
Solution Approach 1:
The patent transitions from a single-row tooth arrangement to a multi-row tooth configuration arranged circumferentially around the rod member. This dimensional change allows the engagement area to be distributed across multiple rows, providing sufficient engagement strength while reducing the axial travel distance required for disengagement, as the handle can be released by moving a shorter distance along the axial direction.
Solution Approach 2:
The tooth structure is segmented into multiple rows arranged around the rod member, with each row containing multiple toothed portions spaced around the axial direction. This segmentation distributes the engagement function across multiple discrete contact points, maintaining strong engagement while allowing the mechanism to disengage with minimal axial movement.
2Manufacturing precision
If the handle portion is positioned in a required position after shaft rotation, then the shaft achieves the required position, but the handle portion may be in a unsuitable position which may cause obstacles or danger to riding
Solution Approach 1:
The patent implements a dynamic handle positioning mechanism where the handle portion can be rotated independently after the shaft reaches its required position. The quick release structure allows the handle to be adjusted to a suitable position that does not create obstacles or safety hazards, while maintaining the shaft's precise positioning through the engagement of the toothed members.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A quick release structure includes a rod member (10), an arm member (20), a restriction member (30), and a pushing means. The rod member (10) includes a toothed member (12) having a plurality of rows of first teeth (121) arranged spacedly thereon. The arm member (20) has a plurality of rows of second teeth (212) arranged spacedly on its inner peripheral surface. The arm member (20) is sleeved on the toothed member (12) and is axially slidable. The restriction member (30) is disposed on the rod member (10). The pushing means is arranged between the rod member (10) and the arm member (20) to make the rows of first teeth (121) and the rows of second teeth (212) being engaged normally. When the arm member (20) is moved axially to a rotation position, the rows of first teeth (121) and the rows of second teeth (212) are staggered and aligned alternately so that the arm member (20) is rotatable relative to the rod member (10).