Fishing Spinning Reel Aligning Holder Concentricity
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Solution Overview
Problem
Existing fishing spinning reels face limitations in design freedom and increased sliding resistance due to material strength requirements and bearing concentricity issues, leading to compromised smoothness and accuracy of spool operation.
Innovation Solution
A fishing spinning reel design that incorporates a cylindrical drive shaft sleeve with a bearing fitted on an aligning holder, which is concentrically fitted to the drive shaft sleeve, eliminating the need for rolling members and allowing for a wider selection of materials and bearing strength, thereby reducing sliding resistance and enhancing design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rolling members are interposed between the drive shaft sleeve and spool shaft to support the spool shaft, then the spool shaft can be guided and rolled in the front-rear direction, but the drive shaft sleeve and spool shaft require high strength and durability which limits material selection and design freedom
Solution Approach 1:
The patent removes the rolling members from the system entirely and replaces them with a bearing fitted directly to the spool shaft. This extraction of the intermediate rolling members simplifies the structure and eliminates the need for high-strength drive shaft sleeve and spool shaft combinations, thereby restoring design freedom while maintaining support reliability.
2Ease of operation
If a bearing is fitted in the rotor nut screwed on the drive shaft sleeve to support the spool shaft, then the spool shaft can slide in the front-rear direction, but the bearing cannot achieve high concentricity with the drive shaft sleeve which increases sliding resistance
Solution Approach 1:
The patent segments the bearing support structure from the drive shaft sleeve by fitting the bearing directly to the spool shaft rather than through the rotor nut and drive shaft sleeve assembly. This segmentation allows the bearing to be independently positioned on the spool shaft, ensuring high concentricity and reducing sliding resistance while maintaining ease of operation.
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
The design achieves high concentricity of the bearing with the drive shaft sleeve, reducing sliding resistance and allowing for a more durable and cost-effective fishing spinning reel with increased design freedom, ensuring smooth and accurate spool operation.
Implementation Method 1
a sliding resistance on the spool shaft is increased, which may degrade smoothness of the rotational operation of the handle
Data Source
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AI summary
A fishing spinning reel comprising: a cylindrical drive shaft sleeve (10) rotatably supported by a reel body (2) and extending in a front-rear direction; a spool shaft (8) inserted in the drive shaft sleeve and reciprocating back and forth; a rotor nut (20) screwed in a front end portion (10a) of the drive shaft sleeve; a bearing (31) fitted on an inner peripheral surface (22a) of the rotor nut and supporting the spool shaft slidably in a front-rear direction; and a cylindrical aligning holder (130) attached on the front end portion (10a) of the drive shaft sleeve, wherein the aligning holder (130) is fitted in the front end portion of the drive shaft sleeve and fitted on the inner peripheral surface (22a) of the rotor nut, and a joint surface (131) of the aligning holder (130) fitted in the front end portion (10a) of the drive shaft sleeve and an outer peripheral surface (132) of the aligning holder fitted on the inner peripheral surface (22a) of the rotor nut are made concentric with each other.