Clutch Outer Center of Gravity Adjustment
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Solution Overview
Problem
Existing manufacturing methods for straddle-type vehicles, such as motorcycles, face inefficiencies in adjusting the center of gravity of components like clutches and continuously variable transmissions, leading to vibration and decreased ride comfort due to manufacturing errors, and require replacement of small components, complicating the process when the pulley is mounted in an engine unit.
Innovation Solution
The design includes a clutch with a thick portion and a position-of-center-of-gravity adjusting portion on the clutch outer, and a continuously variable transmission with a rotary member and position-of-center-of-gravity adjusting part, allowing for easier adjustment of the center of gravity without replacing the components, even when mounted, by positioning these parts strategically to bring the center of gravity closer to the center of rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manufacturing work is performed to adjust the center of gravity of small components like clutch or pulley, then the position of center of gravity can be corrected, but the manufacturing range is small and work efficiency decreases
Solution Approach 1:
The clutch outer is designed with a thick portion having larger thickness than other portions, creating a localized area with sufficient manufacturing range. The position-of-center-or-gravity adjusting portion is formed specifically in this thick portion, allowing center of gravity adjustment work to be performed efficiently without affecting the entire component.
2Object-affected harmful factors
If the position of center of gravity is greatly shifted from center of rotation, then vibration occurs and ride comfort degrades, but replacing the entire component increases manufacturing complexity
Solution Approach 1:
Instead of replacing the entire clutch component when center of gravity shift is detected, the invention provides for forming a position-of-center-or-gravity adjusting portion in the thick portion of the clutch outer. This localized correction approach eliminates vibration caused by center of gravity shift without requiring complete component replacement, thereby reducing manufacturing complexity.
3Reliability
If the pulley is mounted in the engine unit, then the transmission function is achieved, but it becomes difficult to perform manufacturing work for center of gravity adjustment
Solution Approach 1:
The clutch outer is designed with a thick portion that provides sufficient manufacturing range for center of gravity adjustment. This preliminary design feature allows the position-of-center-or-gravity adjusting portion to be formed before the clutch is mounted in the engine unit, making manufacturing work easier while maintaining the transmission function.
Data Source
AI summary
A clutch includes a clutch inner and a clutch outer that houses the clutch inner and that transmits or interrupts torque between itself and the clutch inner. The clutch outer has a thick portion that has a larger thickness than the other portions of the clutch outer. A position-of-center-of-gravity adjusting portion for bringing the center of gravity of the clutch close to the axial center of a driven shaft is formed at a position separate from the axial center of the driven shaft of the thick portion. Efficiency of manufacture work of bringing the position of the center of gravity close to the center of rotation is thereby enhanced.