Centrifugal Brake System with Eccentric Shoes for Fishing Reels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fishing reel brake systems face challenges in providing precise control over braking power without opening the side cover and in achieving a zero braking power state essential for noise tests or reel performance tests, with both centrifugal and magnetic brake systems having disadvantages such as imprecise operation and constant braking force.
Innovation Solution
A fishing reel with a centrifugal brake system featuring brake shoes with weight eccentric structures and protruding stoppers that limit swing displacement angles, allowing for precise control of braking power through a controller dial, enabling the brake disc to move away from or towards the brake shoes, and incorporating a guide mechanism for smooth power adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a brake shoe type centrifugal brake system is used, then braking power can be generated only when the spool is rotated, but the side cover must be opened to control the braking power
Solution Approach 1:
A dial controller is introduced as an intermediary mechanism that allows the user to adjust the braking power by rotating the dial, which in turn moves the brake shoes relative to the brake disc through a linkage mechanism, eliminating the need to open the side cover for adjustment
Solution Approach 2:
The brake shoes are designed with a weight eccentric structure that allows them to swing dynamically based on centrifugal force when the spool rotates, enabling automatic adjustment of braking contact based on rotation speed while the dial controller provides static position adjustment
2Measurement precision
If a brake shoe type centrifugal brake system is used, then braking power is generated only during spool rotation, but the braking force is imprecise and difficult to control
Solution Approach 1:
The dial controller allows the user to change the positional parameter of the brake shoes relative to the brake disc, adjusting the initial contact position and the degree of engagement, thereby precisely controlling the braking force magnitude
Solution Approach 2:
The manual adjustment mechanism is replaced with a dial-based control system that uses rotational motion to drive a screw or cam mechanism, providing finer control resolution and more precise braking force adjustment compared to direct manual manipulation
3Ease of operation
If a magnetic brake system is used, then braking power can be controlled by rotating a dial without opening the side cover, but the braking force always acts continuously
Solution Approach 1:
The brake shoes are designed to engage with the brake disc periodically based on the rotation of the spool, utilizing centrifugal force to swing the brake shoes into contact during specific phases of rotation, thereby providing intermittent braking rather than continuous braking force
Solution Approach 2:
The braking force is applied locally and selectively during specific phases of spool rotation when centrifugal force causes the brake shoes to swing into contact with the brake disc, rather than applying continuous braking force throughout the entire rotation cycle
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 system allows for precise control of braking power without opening the side cover, enabling easy selection of zero braking power states and reliable, uniform braking force application, enhancing fishing reel performance and usability.
Implementation Method 1
a plurality of brake shoes radially coupled to the support member by respective shaft pins, each of the brake shoes having a heavy weight part and a light weight part on opposite sides based on the corresponding shaft pin to have a weight eccentric structure, wherein when the spool is rotated, the brake shoes are swung by centrifugal force
Data Source
AI summary
Disclosed herein is a fishing reel having a centrifugal brake system. The fishing reel includes a frame, a shaft, a spool and a centrifugal brake system. The centrifugal brake system includes a support member, a plurality of brake shoes, a brake disc, a controller and a connection member. The support member is provided on one side of the spool and is rotated in conjunction with the spool. The brake shoes are radially coupled to the support member by respective shaft pins. Each brake shoe has a heavy weight part and a light weight part on opposite sides based on the shaft pin to have a weight eccentric structure. The controller adjusts a distance between the brake disc and the brake shoes, thus controlling braking power. The connection member is coupled to the support member and includes protruding stoppers which limits swing displacement angles of the respective brake shoes.