Fishing Reel One-Way Clutch with Nested Holder Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional one-way clutches in fishing reels are large and heavy due to their radial integration, making it difficult to downsize the reel body and complicating the handling of constituent members during manufacturing, assembly, and maintenance.
Innovation Solution
A one-way clutch design featuring an inner ring, outer ring, and holder with a first and second holder integrated via an engagement fixing portion on the radially inner side of the outer ring, allowing for reduced size and weight by eliminating radial protrusions and facilitating easy assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the holder is formed into a plurality of structures (first holder and second holder) and integrated so that constituent members do not come off in the axial direction, then the one-way clutch becomes large in the radial direction, but the reel body cannot be downsized
Solution Approach 1:
The second holder is positioned inside the first holder in the radial direction, with the outer ring fitting into the second holder. This nested arrangement allows the plurality of holders to be integrated without increasing the radial size of the one-way clutch, while still preventing constituent members from coming off in the axial direction through the combined structure.
2Ease of manufacture
If the first holder and second holder are engaged with each other on the radially outer side of the outer ring, then the one-way clutch becomes large in the radial direction, but the reel body cannot be reduced in size and weight
Solution Approach 1:
The holders are arranged in a nested configuration where the second holder is inside the first holder, and the outer ring is inside the second holder. This nesting eliminates radial protrusions, reducing the overall size and weight of the reel body while maintaining ease of manufacture through the integrated structure.
Solution Approach 2:
Instead of integrating the first and second holders on the radially outer side (radial dimension), the engagement is achieved on the radially inner side, utilizing the axial and circumferential dimensions. This dimensional shift reduces radial protrusion and overall reel body size while maintaining assembly ease.
3Ease of manufacture
If a structure that can be easily separated by light press fitting is used, then assembly is simplified, but it is necessary to perform an operation of paying attention to scattering such as falling off of components
Solution Approach 1:
The holder is divided into separable first holder and second holder components that can be easily separated by light press fitting. The engagement fixing portion provides a defined engagement interface that allows simple separation while the integrated structure prevents component scattering during manufacturing and assembly operations.
4Reliability
If the one-way clutch is screwed and fixed to the reel body radially outward, then the connection is secure, but the reel body cannot be reduced in size and weight
Solution Approach 1:
The outer ring is fitted into the second holder in a nested arrangement, eliminating the need for radial protrusions and screw fixing structures. This nested integration secures the one-way clutch to the reel body through the integrated holder structure, reducing both size and weight while maintaining connection security.
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 a smaller and lighter reel body with improved handling of components, enabling quicker and more reliable operation while preventing reverse rotation effectively.
Implementation Method 1
a holder (23) comprising a holding portion (23a) holding a biasing spring (24) for biasing a plurality of rolling members (25)
Implementation Method 2
a plurality of rolling members (25) provided between the inner ring (21) and the outer ring (27)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A one-way clutch (20) of the present invention comprises an inner ring (21), an outer ring (27), and a holder (23) comprising a holding portion holding a biasing spring for biasing a plurality of rolling members (25). The holder (23) comprises a first holder (23A) provided with the holding portion, and a second holder (23B) attached to the first holder (23A) so as to hold the outer ring (27) in an axial direction. The first holder (23A) and the second holder (23B) are integrated by an engagement fixing portion provided on a radially inner side of an inner circumferential contour of the outer ring (27).