Weight-Actuated Release Clamp for Automatic Parcel Delivery
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Solution Overview
Problem
Current drone and ground vehicle delivery systems lack an efficient means to securely transport parcels and automatically release them upon delivery, often relying on complex electronic systems that can be damaged and reduce vehicle range.
Innovation Solution
A clamp mechanism using pivotally coupled members with a linkage system that utilizes the weight of the item to generate a clamping force, automatically securing and releasing the item based on its weight, and extension members that assist in maintaining the closed position during transport and opening when the item is lowered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If electronic systems and sensors are used to release the parcel upon delivery, then the delivery can be automated, but the system complexity increases and the range decreases due to energy consumption and vulnerability to damage
Solution Approach 1:
The patent replaces electronic systems and sensors with a purely mechanical linkage system. The clamp members are connected through linkages that automatically transition between closed and open positions based on the physical state of the parcel (suspended vs. resting), eliminating the need for electronics while achieving automated release
Solution Approach 2:
The mechanical linkage system is self-actuating and requires no external power source or control system. The system automatically responds to the parcel's weight and position, with the clamp members opening when the parcel rests on a surface and closing when suspended, providing self-service automation
2Extent of automation
If additional batteries are used to power electronic systems, then the automation capability is improved, but the vehicle weight increases and range decreases
Solution Approach 1:
The patent eliminates the need for batteries and electronic power systems by using a passive mechanical linkage design. The system operates solely through mechanical forces generated by the parcel's weight and the geometry of the linkage, reducing vehicle weight while maintaining automation
Solution Approach 2:
The patent extracts and removes the electronic system and battery components from the delivery mechanism, retaining only the essential mechanical functionality. This extraction eliminates the weight penalty associated with power systems while preserving the core automated release capability
3Device complexity
If the clamp uses a simple mechanical design, then the device complexity is reduced, but the ability to automatically adjust clamping force based on weight is limited
Solution Approach 1:
The patent employs dynamic linkage geometry where the angles and positions of the linkage members change automatically based on the load. As the parcel weight varies, the linkage naturally adjusts the clamping force through geometric relationships, providing adaptive behavior without complex control mechanisms
Solution Approach 2:
The linkage system uses asymmetric member configurations and pivot point placements that create different mechanical advantage ratios at different stages of operation. This asymmetry enables the system to automatically provide appropriate clamping force for different weight classes without active control
4Reliability
If the clamp members are kept in constant contact to secure the item, then the security is improved, but the automatic release capability is reduced
Solution Approach 1:
The clamp members undergo periodic transitions between closed (securing) and open (releasing) states based on the parcel's position. During transport with the parcel suspended, the clamps remain closed providing security; when the parcel rests on a surface, the linkages automatically transition the clamps to the open state for release
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
Enables secure and efficient transportation of items by automatically adjusting the clamping force based on the item's weight, reducing the risk of damage to electronic systems and extending the vehicle's range by eliminating the need for heavy batteries.
Implementation Method 1
a line (e.g., a cable) may generate a first directional force that acts on a linkage of the clamp. The linkage may be coupled to the first end of the first clamp member and the first end of the second clamp member. In response to the first directional force, the linkage generates a second directional force that acts on the first ends of the first and second clamp members so as to cause the second ends of the first and second clamp members to move towards one another
Implementation Method 2
The clamp may utilize the weight of the item to generate a clamping force, for example when the item is lifted or suspended
Implementation Method 3
the clamp may include a tensioning element that biases the clamp to an open position, allowing the clamp to open when the item is resting on a surface
Data Source
AI summary
Aspects herein are directed to a clamp having a linkage coupled to a first end of a first and second clamp member. Based on applying a first directional force to the linkage, the linkage generates a force that moves the second ends of the first and second clamp member towards one another, thereby biasing the clamp to the closed position. The clamp secures a strap when the clamp is in the closed position and releases the strap when the clamp is in an open position.