Vacuum and Grab Arm Attachment for Construction Lifting
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Solution Overview
Problem
Vacuum lifts attached to construction equipment face issues with off-center lifting, loss of suction, and tilting during object manipulation, particularly with cylindrical and non-cylindrical objects, due to the need for a clean and smooth surface, which can lead to dangerous conditions and object drop.
Innovation Solution
An attachment combining a vacuum mechanism with grab arm assemblies that act as a backup to maintain object grip in case of suction failure or improper centering, allowing for secure lifting and manipulation of various objects, including cylindrical and non-cylindrical ones, by moving the grab arms between retracted and gripping positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a vacuum lift mechanism is used to lift objects, then lifting efficiency is improved, but reliability deteriorates due to potential loss of suction or improper centering
Solution Approach 1:
The grab arm assembly is positioned and configured to provide backup support before vacuum failure occurs. The arms are pre-adjusted to appropriate positions and can immediately engage to support the object's weight if vacuum is lost, preventing dangerous drops and providing a safety cushion.
Solution Approach 2:
The system changes the state of object support from purely vacuum-based to a combined vacuum and mechanical grip system. By adjusting the grab arms to appropriate positions, the system prepares alternative support parameters that can be activated if vacuum pressure fails.
2Speed
If a vacuum lift mechanism is used, then operation speed is improved, but safety deteriorates due to dangerous tilting and loss of control
Solution Approach 1:
The grab arm assembly is pre-positioned to counteract potential tilting and loss of control before these harmful effects occur. By having the mechanical backup ready in advance at proper positions, the system can immediately prevent dangerous tilting if vacuum centering fails during high-speed operations.
3Reliability
If grab arm assemblies are added as backup, then reliability is improved, but device complexity increases
Solution Approach 1:
The grab arm assembly is designed to perform multiple functions: it can support objects during vacuum engagement, provide backup if vacuum fails, enable vertical orientations, and assist with positioning. This multi-functionality justifies the added complexity by providing comprehensive reliability improvements and expanded capability.
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
Ensures stable lifting and manipulation of diverse objects by providing a secondary gripping mechanism, preventing object drop and enabling orientations not possible with vacuum mechanisms alone, such as vertical positions, while maintaining control and safety during construction operations.
Implementation Method 1
a vacuum mechanism configured for picking up an object via vacuum
Data Source
AI summary
An attachment that incorporates a vacuum mechanism along with one or more grab arm assemblies. The vacuum mechanism and each grab arm assembly are configured to hold an object at the same time. In other embodiments, the object can be held solely by the vacuum mechanism or solely by the grab arms. In case of failure of the vacuum mechanism, for example a loss of suction or vacuum power or the vacuum is not properly centered on the object, the grab arm assembly acts as a back-up lifting mechanism to hold the object so that the object is not dropped. In addition, the grab arm assembly permits the attachment to hold the object in orientations, such as vertical, that are not possible using the vacuum mechanism by itself.