Roller Clutch Torsion Spring Orthogonal Pressing Portion
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Solution Overview
Problem
Roller clutches for fishing reels face the challenge of generating a tilting moment due to the changing contact position between the roller and the arm portion, which affects stable biasing and efficient power transmission.
Innovation Solution
The roller clutch design incorporates torsion springs with a pressing portion that extends orthogonally to the axial direction of the roller, preventing the generation of a tilting moment and ensuring stable biasing, while also allowing for a reduction in size by positioning the coil portion adjacent to the outer or inner ring and ensuring it does not overlap with the roller radially.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the arm portion extends in the axial direction of the roller to press against the roller, then the roller can be biased toward the transmitting position, but the contact position changes in the axial direction causing a tilting moment that destabilizes the roller
Solution Approach 1:
The pressing portion is extended in a direction orthogonal to the axial direction of the roller (radial direction), changing the dimension of the arm portion from axial extension to radial extension. This dimensional change ensures that the contact position between the pressing portion and roller remains constant in the axial direction, eliminating the tilting moment while maintaining the biasing force.
2Reliability
If the coil portion is positioned to accommodate the torsion spring, then the spring can function, but the radial size of the roller clutch increases
Solution Approach 1:
The coil portion of the torsion spring is nested within the housing member, specifically positioned in a recess or cavity formed in the housing. This nesting arrangement allows the torsion spring to be accommodated within the existing radial space of the roller clutch assembly, eliminating the need for additional radial space and maintaining a compact design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration stabilizes the roller bias and prevents tilting, enabling efficient one-way power transmission while reducing the size of the fishing reel by optimizing the placement and structure of the torsion springs.
Implementation Method 1
The torsion springs (6) include a coil portion (61) and an arm portion (62) that extends from the coil portion (61)
Implementation Method 2
the torsion springs (6) bias the rollers (4) toward the transmitting position side or the non-transmitting position side
Data Source
AI summary
A roller clutch for a fishing reel includes an outer ring, an inner ring, a roller, and a torsion spring. The roller is capable of moving between a transmitting position for transmitting power between the outer ring and the inner ring and a non-transmitting position for canceling the transmission of the power. The torsion spring biases the roller toward one of the transmitting position and the non-transmitting position. The torsion spring has a coil portion and a first arm portion extending from the coil portion. The first arm portion has a pressing portion. The pressing portion extends in a direction orthogonal to the axial direction of the roller and comes into contact with the roller.