Centrifugal Clutch Distal-End Spring Layout for Compact Capacity
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Solution Overview
Problem
Existing centrifugal clutches require a strong connection spring to regulate clutch weight displacement, leading to difficulties in securing necessary clutch capacity and enlarged device sizes.
Innovation Solution
A centrifugal clutch design featuring a drive plate with rotatably attached clutch weights and a torsion spring positioned adjacent to the clutch weight's distal end, applying force to resist centrifugal force, allowing for smaller elastic force requirements and reduced device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connection spring with large elastic force is used to regulate the displacement of the clutch weight, then the clutch capacity can be secured, but the device configuration size becomes enlarged
Solution Approach 1:
The patent changes the positioning parameter of the spring from the center of the clutch weight to the distal end of the clutch weight. This parameter change allows the spring to be more effective in regulating displacement, enabling the use of a spring with smaller elastic force while maintaining the required clutch capacity, thus avoiding enlargement of the device configuration.
Solution Approach 2:
The patent transitions from a centralized spring arrangement to a distributed arrangement where the spring acts at the distal end of the clutch weight. This dimensional change in spring positioning creates a more efficient leverage mechanism, allowing smaller force application while achieving the same regulatory effect on clutch weight displacement.
2Device complexity
If the connection spring is connected to the center part of the clutch weight, then the structure is simplified, but it requires larger elastic force and enlarges the device size
Solution Approach 1:
The patent modifies the connection position parameter of the spring from the center to the distal end of the clutch weight. This parameter change improves the mechanical advantage of the spring, allowing it to regulate displacement with smaller elastic force while maintaining structural simplicity through the use of the same basic components.
3Ease of operation
If the torsion spring is disposed at the outermost peripheral part of the drive plate, then the clutch weight can be easily pushed to the clutch outer part, but the spring positioning becomes more critical
Solution Approach 1:
The patent positions the spring at the outermost peripheral part of the drive plate, utilizing the maximum radial distance from the rotation center. This dimensional positioning maximizes the lever arm length, thereby maximizing the mechanical advantage and making it easier to push the clutch weight to the clutch outer part with minimal spring force.
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 effectively secures clutch capacity without enlarging the device configuration by regulating clutch weight displacement with smaller forces and reducing the size of the centrifugal clutch components.
Implementation Method 1
swings in a direction in which the clutch shoe comes into contact with or becomes separated from the tubular surface of the clutch outer in accordance with centrifugal force due to rotational drive of the drive plate
Implementation Method 2
a torsion spring that applies force resisting the centrifugal force with respect to the clutch weight
Implementation Method 3
the centrifugal force by the rotational drive of the second drive plate brings the clutch weights into contact with the tubular surface of the clutch outer part via the clutch weight
Data Source
AI summary
The present invention relates to a centrifugal clutch (100). The centrifugal clutch (100) includes a drive plate (110) that is rotationally driven directly by the driving force of the engine. The drive plate (110) includes a swing support pin (113) that supports a clutch shoe (123) in a swinging state with respect to a clutch outer part (130), and a spring support (115) that supports a torsion spring (116). The spring support (115) is provided in a standing state on a base (111) adjacent to one distal end (121a) of both end parts of a clutch weight (120) in the circumferential direction that faces a tubular surface (131) of the clutch outer part (130). Both end parts (116b) and (116c) of the torsion spring (116) are respectively hooked on the distal end (121a) of one clutch weight (120) and a proximal end (121b) of the other clutch weight (120) of the two clutch weights (120).