Ribbed Wrench Handle Structure for Torque and Secure Grip
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Solution Overview
Problem
Conventional wrenches face issues such as reduced torque and handle breakage due to weight reduction, and lack of a secure grip leading to hand slippage during use.
Innovation Solution
A wrench structure with recessed portions and a projection on the handle, combined with ribs and varying thicknesses, enhances torque and toughness while providing a secure grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the handle is provided with a depression to reduce weight, then the weight is reduced and material cost is saved, but the torque is reduced and the handle is easily broken or bent
Solution Approach 1:
The handle is segmented into multiple functional zones: recessed portions for weight reduction, a projection for torque enhancement, and ribs for structural reinforcement. This segmentation allows each zone to serve its specific function while collectively resolving the contradiction between weight reduction and strength maintenance.
Solution Approach 2:
Different regions of the handle are given different structural qualities: the recessed portions have reduced material for weight savings, the projection has concentrated material for torque enhancement, and the ribs have increased material for structural strength. This local differentiation resolves the contradiction by optimizing each region for its specific function.
2Force
If the handle is provided with a first block to increase rotation torque, then the maximum rotation torque is increased, but the handle lacks holding portions causing user's hand to easily slip
Solution Approach 1:
The projection is provided with second faces and second side faces with specific geometries that protrude from the first faces, creating localized grip-enhancing features. These features provide friction and mechanical interlocking with the user's hand while maintaining the torque-enhancing function of the projection.
Solution Approach 2:
The solution adds surface geometry complexity to the projection through second faces and second side faces, transitioning from a simple block to a multi-faceted structure that provides both torque enhancement and secure gripping surfaces in different dimensional aspects.
3Reliability
If the handle is provided with ribs to increase rotation toughness, then the rotation toughness is improved and the handle is not broken easily, but the weight and complexity increase
Solution Approach 1:
The reinforcement function is segmented into multiple discrete ribs distributed around the handle circumference, rather than using a single bulky reinforcement structure. This segmentation provides rotation toughness through distributed structural support while minimizing overall material addition and complexity.
Solution Approach 2:
The ribs are strategically positioned to provide local reinforcement where rotation stresses are highest, rather than uniformly thickening the entire handle. This localized reinforcement achieves the required rotation toughness with minimal additional material and structural complexity.
Data Source
AI summary
A wrench structure includes a wrench body provided with a handle. The handle has a top and a bottom each provided with two first faces and two first recessed portions. The handle has a center provided with a projection having two second faces protruding from the first faces. The handle is provided with eight ribs. Each of the first recessed portions is defined between two of the ribs. The handle has two sides each provided with two first side faces. The projection has two second side faces protruding from the first side faces. A first guide angle is provided between each of the first side faces and one of the second side faces. The handle has a first end provided with a first rotation portion and a second end provided with a second rotation portion.