Foldable Handle Device Frame Turning Fulcrum
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Solution Overview
Problem
Existing handle devices for work machines, such as power generators, have complex structures with numerous components, which can be improved for simplicity and reduced complexity.
Innovation Solution
A handle device with a frame that serves as a turning fulcrum, utilizing a handle turning mechanism comprising shaft-clasping members and pressure-coupling members, eliminating the need for separate shafts or screws, and incorporating sliding members and rubber components for resistance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a separate shaft (including bolt or small screw) is used as the turning fulcrum when the handle is folded up, then the handle can be attached to the frame, but the structure becomes complicated and requires additional components
Solution Approach 1:
The frame is designed to directly serve as the turning fulcrum by forming a recessed portion with a given radius at the attachment location. This merges the function of a separate shaft into the frame structure itself, eliminating the need for additional shaft components, bolts, or screws as turning fulcrums, thereby simplifying the overall structure and reducing component count
Solution Approach 2:
The frame performs multiple functions: it provides structural support for the work machine and simultaneously serves as the turning fulcrum for the foldable handle. This multi-functionality eliminates the need for dedicated shaft components, reducing device complexity while maintaining manufacturing ease
2Strength
If a separate shaft is used as the turning fulcrum, then the handle can be attached to the frame, but the fulcrum portion may lack sufficient strength
Solution Approach 1:
By merging the shaft function into the frame structure itself through a recessed portion formed directly on the frame, the fulcrum inherits the frame's inherent strength. This eliminates weak points associated with separate shaft components while maintaining structural integrity, achieving both high strength and simplified structure
3Device complexity
If existing pipes of the frame are utilized for handle attachment, then the structure is simplified, but the handle may not be securely attached without adequate resistance control
Solution Approach 1:
The frame is designed with a recessed portion at the specific attachment location that has a given radius. This local structural feature provides both the turning fulcrum function and sufficient resistance against handle rotation, ensuring reliable attachment while maintaining overall structural simplicity and utilizing the existing frame pipes
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 solution simplifies the structure, ensures sufficient strength, and allows the handle to be securely attached and folded without unnecessary components, maintaining stability during transportation and use.
Implementation Method 1
the handle turning mechanism comprises: a pair of shaft-clasping members for holding the handle support part in a sandwiching manner; and pressure-coupling members for pressing the shaft-clasping members towards the handle support part... appropriate resistance against the turning of the handle is created by the rubber members
Data Source
AI summary
A work machine handle device includes a handle foldable relative to a frame. The frame has a handle support part about which the handle turns. The handle intersects the handle support part. Left and right attachment parts, which are portions where the handle intersects the handle support part, are supported by a handle turning mechanism with suitable pressure.