CVT Sheave Rotation Detection with Integrated Detected Portion
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Solution Overview
Problem
Conventional continuously variable transmissions have complex structures and heavy sheaves due to the need for separate members to detect pulley rotation, which complicates assembly and increases weight.
Innovation Solution
Integrally forming a detected portion with the sheave body of the pulley, eliminating the need for separate members and simplifying the structure while reducing weight by incorporating protruding portions that facilitate easy detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate pin members and cylinders are attached to the movable sheave to detect rotation, then the rotation detection function is achieved, but the structure becomes complicated and assembly difficulty increases
Solution Approach 1:
The detected portion is integrally formed with the movable sheave as a single unit, merging the sheave body and detection features into one component. This eliminates the need for separate pin members and cylinders, thereby simplifying the structure while maintaining the rotation detection function.
2Reliability
If separate pin members and cylinders are attached to the movable sheave to detect rotation, then the rotation detection function is achieved, but the assembly process becomes more difficult
Solution Approach 1:
The detected portion is integrally formed with the movable sheave, combining multiple components into one. This integral construction eliminates the need for separate assembly steps for attaching pin members and cylinders, significantly improving assembly ease while ensuring reliable rotation detection.
3Reliability
If separate pin members and cylinders are attached to the movable sheave to detect rotation, then the rotation detection function is achieved, but the sheave weight increases
Solution Approach 1:
The detected portion is formed as an integral part of the movable sheave, eliminating the need for additional separate components. This integration removes the extra weight of pin members and cylinders, reducing the overall sheave weight while maintaining the rotation detection capability.
Data Source
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AI summary
There is provided a continuously variable transmission (15) and a straddled vehicle (1) including the continuously variable transmission (15), in which a detected portion (102) can be configured with a simple structure and an assemblability of the detected portion (102) and sheave (84) can be improved; continuously variable transmission (15) of a straddled vehicle (1) transmitting driving force from an engine (14) to a wheel (5. continuously variable transmission (15) including, a primary pulley (41), a secondary pulley (42), a belt (43) and a detection portion (100; detection portion (100) detecting rotation of at least one of the primary pulley (41) and the secondary pulley (42); each of the primary pulley (41) and the secondary pulley (42) including a fixed sheave (82) and a movable sheave (83); at least one of the fixed sheave (82) and the movable sheave (83) including a sheave body (84) and a detected portion (102);. the detected portion (102) being formed integrally with the sheave body (84) and is detected by the detection portion (100).