Compact Hook Apparatus for Centering and Clamping Metal Sheets
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Solution Overview
Problem
Existing apparatuses for centering and clamping metal sheets of varying thicknesses are either too large or unsuitable for applications with limited space and require significant handling space, and they lack a high clamping force.
Innovation Solution
A compact and lightweight apparatus with a control rod and auxiliary shaped body featuring a slit and pins that engage L-shaped members, allowing for reversible and irreversible movements to securely clamp workpieces of different thicknesses, ensuring safe operation and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional clamping apparatus is used to accommodate varying sheet thicknesses, then the apparatus can handle different thickness ranges, but it takes up a large amount of space
Solution Approach 1:
The patent employs a dynamic linkage mechanism with L-shaped members and pins that automatically adapt to different sheet thicknesses. The linkage allows the clamping arm to pivot and adjust its position based on the thickness of the workpiece, eliminating the need for fixed-position adjustments or multiple clamping points. This dynamic adaptation enables the apparatus to handle varying thickness ranges while maintaining a compact structure.
Solution Approach 2:
The patent implements a nested configuration where the L-shaped members are positioned within the housing structure, and the pins are contained within the linkage mechanism. The clamping arm nests within the housing when not in use, and the linkage components are integrated into each other. This nesting approach minimizes the overall apparatus volume while preserving the functionality to accommodate different sheet thicknesses.
2Weight of stationary object
If the apparatus structure is made compact and lightweight, then it is suitable for robotic handling and limited space applications, but it may reduce the clamping force
Solution Approach 1:
The patent utilizes curved guide surfaces and arc-shaped paths for the pins within the L-shaped members. These curved geometries provide mechanical advantage by converting small movements of the actuating cylinder into large clamping forces. The curved paths also ensure smooth force transmission and reduce stress concentrations, allowing the lightweight apparatus to generate sufficient clamping force without requiring heavy structural components.
Solution Approach 2:
The patent replaces traditional heavy-duty mechanical clamping mechanisms with a pneumatic or hydraulic actuating cylinder that provides the clamping force. This substitution allows the use of lighter structural components while maintaining high clamping force capability. The actuator directly drives the linkage mechanism, eliminating the need for complex gear trains or screw mechanisms that would add weight and complexity.
3Force
If the apparatus is designed for high clamping force, then it can securely hold workpieces, but it requires more space and complex structure
Solution Approach 1:
The patent combines multiple functions into the L-shaped members and pins, which simultaneously serve as linkage elements, guides, and force transmission components. The same components that provide the mechanical advantage for high clamping force also guide the movement of the clamping arm and limit its travel. This merging of functions reduces the number of separate parts and simplifies the overall structure while maintaining high clamping force capability.
Solution Approach 2:
The linkage mechanism with L-shaped members and pins serves multiple purposes: it provides mechanical advantage for force multiplication, guides the clamping arm through its range of motion, accommodates different sheet thicknesses, and limits the clamping stroke. This multi-functionality eliminates the need for separate components for each function, reducing structural complexity while achieving high clamping force.
4Volume of moving object
If the apparatus uses a complex linkage mechanism to achieve compact size, then it reduces space usage, but it may increase manufacturing complexity
Solution Approach 1:
The patent divides the clamping mechanism into discrete, modular components: the housing, the L-shaped members, the pins, and the actuating cylinder. Each component can be manufactured separately using standard machining processes and then assembled through straightforward alignment and fastening. The L-shaped members are simple geometric forms that are easy to fabricate, and the pins are standard cylindrical components. This segmentation into simple, manufacturable parts reduces manufacturing complexity despite the compact and functional integration of the overall mechanism.
Data Source
Figure 1
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AI summary
A hook apparatus for centering and clamping workpieces, particularly metal sheets, comprises a main body (12) defining a resting zone (62) of a workpiece, a hooking member (19) movable between a resting position spaced from the resting zone (62) and at least one clamping position close to the resting zone (62), and members for controlling the movement of the hooking member (19) such as to allow workpieces of different thickness to be locked. The control means include a control rod (20) slidable with respect to the main body (12) between a lowered position and a raised position, at least one L-shaped member (32) articulated to a part (22) connected to the rod (20), and guide elements (36, 46, 48) to keep a predetermined orientation of the hooking member (19). The part connected to the rod (20) includes an auxiliary body (22) fixed to the rod (20), having a slit (24) in which a slidable pin (26) is engaged, which also engages a hole (30) of an arm of the L-shaped member (32).