Fishing Reel Gear Reverse Side Interference Prevention
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Solution Overview
Problem
Conventional fishing reel gear mechanisms experience deterioration in meshing state and wear due to the strength difference between the drive gear and pinion gear, leading to reduced rotation performance and strength when the pinion gear bends.
Innovation Solution
Incorporating an interference prevention portion, such as a notched portion, on the reverse side faces of the gear teeth to prevent contact between the drive and pinion gears, even when one of the gears is bent, thereby maintaining the meshing state and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the drive gear and pinion gear mesh with each other during rotation, then power transmission is achieved, but the pinion gear may bend and deform due to strength difference, causing deterioration of meshing state and wear
Solution Approach 1:
The gear tooth is divided into multiple functional surfaces: driving side faces for power transmission, reverse side faces for structural support, and relief portions that segment the tooth structure to prevent bending deformation. This segmentation allows the gear to maintain strength while transmitting power effectively.
Solution Approach 2:
Relief portions are extracted or removed from the reverse side faces of the gear teeth. This extraction creates space that prevents the pinion gear from bending inward during meshing, thereby maintaining the meshing state and preventing wear without compromising power transmission capability.
2Ease of operation
If the reverse side faces of the pinion gear contact the reverse side faces of the drive gear, then the meshing state deteriorates and rotation performance decreases, but this contact also causes wear and reduces gear strength
Solution Approach 1:
Relief portions are provided in advance on the reverse side faces of the gear teeth before meshing occurs. These relief portions preemptively prevent the pinion gear from bending inward and contacting the drive gear's reverse side faces, thereby maintaining proper meshing state and rotation performance throughout operation.
Data Source
AI summary
A gear mechanism for a fishing reel includes first and second gears. The first gear has first gear teeth including a first driving side face, and a first reverse side face opposite the first driving side face. The second gear has second gear teeth including a second driven side face that meshes with a respective first driving side faces, and a second reverse side face that faces a respective first reverse side face, and opposite the second driven side faces. At least one of each of the first reverse side faces and each of the second reverse side faces includes an interference prevention portion to prevent interference with the other of the opposing first reverse side faces and second reverse side faces.