Electric Reel Shaft Clearance Coupling for Clutch Wear
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Solution Overview
Problem
Conventional fishing electric reels with low coaxiality between the motor shaft and one-way clutch suffer from decreased product life, noise, reduced winding efficiency, and increased manufacturing costs due to larger bearing sizes.
Innovation Solution
The electric reel design allows a predetermined clearance between the motor shaft fixing member and the one-way clutch shaft member, transmitting rotation without strict coaxial alignment, reducing the one-way clutch's outer diameter and bearing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the coaxiality between motor shaft and one-way clutch shaft is low, then the structure is simpler and manufacturing cost is reduced, but the product life decreases due to wear and noise increases
Solution Approach 1:
A clearance structure is introduced as an intermediary element between the motor shaft fixing member and the one-way clutch shaft member. This clearance allows for misalignment without direct contact, preventing wear and noise while maintaining manufacturing simplicity. The clearance acts as a buffer zone that accommodates coaxiality variations without compromising product life.
2Reliability
If the outer diameter of the one-way clutch is increased, then the reliability improves, but the bearing size increases and manufacturing cost increases
Solution Approach 1:
The design changes the dimensional parameters of the one-way clutch by reducing its outer diameter. This is made possible by the clearance structure that compensates for reduced structural margin, allowing a smaller clutch diameter while maintaining reliability. The parameter change propagates to reduce bearing size and overall manufacturing cost.
3Ease of manufacture
If the clearance between motor shaft fixing member and one-way clutch shaft member is increased, then the tolerance requirement is relaxed and manufacturing cost is reduced, but the rotation transmission precision decreases
Solution Approach 1:
The clearance is designed with optimal dimensions that provide sufficient tolerance relaxation for cost-effective manufacturing while maintaining adequate rotation transmission precision. The clearance is neither too large (which would harm precision) nor too small (which would require tight tolerances), but optimally sized to balance both requirements.
Data Source
AI summary
An electric reel according to one embodiment of the present disclosure comprises: a spool around which a fishing line is wound; a motor having a motor shaft and driven for rotating the spool; a one-way clutch provided for preventing reverse rotation of the motor; a motor shaft fixing member fixed to the motor shaft; and a one-way clutch shaft member fitted into the one-way clutch. The electric reel is configured such that rotation of the motor is transmitted to the one-way clutch through the motor shaft fixing member and the one-way clutch shaft member.