Gardening Trimmer Blade Guide Mechanism for Vibration and Friction Reduction
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Solution Overview
Problem
Existing gardening trimmers face challenges in reducing vibration and frictional resistance during reciprocating motion of the blade, leading to inefficient operation and user discomfort.
Innovation Solution
The design incorporates a combination of slots and guide members with specific configurations to reduce vibration and frictional resistance, including a first combination to minimize friction and a second combination to reduce vibration, with guide members of different shapes and positions to optimize blade movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If guide members are in contact with inner side surfaces of slots to reduce vibration, then vibration is reduced, but frictional resistance becomes higher
Solution Approach 1:
The patent divides the guide members into two distinct types: first guide members connected to the housing and second guide members connected to the guide bar. This segmentation allows each type to serve different functions - first guide members primarily reduce vibration through contact with slot inner side surfaces, while second guide members reduce frictional resistance by maintaining larger distances from the inner side surfaces.
Solution Approach 2:
Different portions of the blade assembly are given different local characteristics. The first guide members are positioned and configured specifically for vibration reduction in certain slots, while second guide members are positioned for friction reduction in other slots. This local differentiation resolves the contradiction by applying the appropriate guide member type to the appropriate location.
2Force
If guide members are not in contact with inner side surfaces of slots to reduce frictional resistance, then frictional resistance is reduced, but vibration becomes higher
Solution Approach 1:
The patent divides the guide members into two distinct types: first guide members connected to the housing and second guide members connected to the guide bar. This segmentation allows each type to serve different functions - first guide members primarily reduce vibration through contact with slot inner side surfaces, while second guide members reduce frictional resistance by maintaining larger distances from the inner side surfaces.
Solution Approach 2:
Different portions of the blade assembly are given different local characteristics. The first guide members are positioned and configured specifically for vibration reduction in certain slots, while second guide members are positioned for friction reduction in other slots. This local differentiation resolves the contradiction by applying the appropriate guide member type to the appropriate location.
3Device complexity
If a single combination of slots and guide members is used, then device complexity is reduced, but both vibration reduction and friction reduction cannot be simultaneously achieved
Solution Approach 1:
The patent divides the guide members into two distinct types: first guide members connected to the housing and second guide members connected to the guide bar. This segmentation allows each type to serve different functions - first guide members primarily reduce vibration through contact with slot inner side surfaces, while second guide members reduce frictional resistance by maintaining larger distances from the inner side surfaces.
Solution Approach 2:
Both first and second guide members are part of the same guide member assembly and work together to achieve multiple functions. The combination of these two types of guide members creates a multi-functional system that simultaneously addresses both vibration reduction and friction reduction, rather than requiring completely separate systems for each function.
Data Source
AI summary
A gardening trimmer may include: a conversion mechanism for converting rotational motion of a prime mover to linear motion along a first direction; a blade for moving in reciprocating motion relative to a guide bar and including a plurality of slots; and a plurality of guide members each disposed in a corresponding slot of the plurality of slots of the blade. The plurality of slots may include: at least one first slot in which a corresponding guide member of the guide members that is connected to a housing is disposed. A combination of the slots and the guide members may include: a first combination to reduce frictional resistance generated by the reciprocating motion; and a second combination to reduce vibration generated by the reciprocating motion, and at least one combination of the at least one first slot and its corresponding guide member is the second combination.