Auxiliary Cushion Structure for Machine Tool Grip
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Solution Overview
Problem
Conventional machine tools do not provide adequate support for the operator's hand during operation, leading to fatigue and discomfort due to the lever mechanism's design, which interferes with normal operation when attempting to support the hand.
Innovation Solution
A machine tool with an auxiliary cushion structure featuring a grip portion, a pivotally mounted control lever, and an auxiliary cushion with a tilted supporting surface that maintains a constant angle, preventing interference with the control lever and providing stable support through a gap between the cushion and lever.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control lever is designed as a seesaw mechanism to support the operator's hand, then hand support is provided, but the lever mechanism interferes with normal operation when pressed
Solution Approach 1:
The support function is segmented from the control lever mechanism. An independent auxiliary cushion structure is added to the grip portion, separate from the control lever's pivot mechanism. This allows the control lever to perform its switching function while the auxiliary cushion independently provides hand support without interference.
Solution Approach 2:
The auxiliary cushion acts as an intermediary element between the operator's hand and the grip portion. It provides the support function that was previously attempted through the control lever mechanism, but does so without interfering with the lever's operational movement and trigger activation.
2Ease of operation
If the auxiliary cushion is mounted close to the control lever to provide support, then hand support is achieved, but the cushion and lever interfere with each other during operation
Solution Approach 1:
The auxiliary cushion is positioned at a specific location on the grip portion that is optimized for hand support while maintaining clear separation from the control lever's movement path. The local placement ensures support functionality without creating interference zones between components.
Solution Approach 2:
The auxiliary cushion has an asymmetric tilted supporting surface design where one end is higher than the other. This asymmetric geometry provides ergonomic hand support while its orientation and positioning ensure it does not symmetrically interfere with the control lever's pivot motion in either direction.
Data Source
AI summary
A machine tool with an auxiliary cushion structure includes a machine tool having a grip portion and a trigger switch mounted on the grip portion. The grip portion has a control lever pivotally mounted thereon to enable the control lever to rotate against the grip portion, so as to press the trigger switch during rotation and drive the machine tool to operate. The grip portion further has an auxiliary cushion mounted thereon and a gap is formed between the auxiliary cushion and the control lever. The auxiliary cushion has a supporting surface which is tilted upwards from one end close to the control lever to the other end. Thus no matter the control lever is pressed by the operator or released, the operator's hand can rest on the supporting surface to alleviate or ease the fatigue.