Actuator Fast-Releasing Mechanism with Linear Pulling Rod
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Solution Overview
Problem
Conventional fast-releasing controlling devices for actuators in electric sickbeds require excessive force for operation due to continuous changes in force direction, leading to less smooth operation and are prone to corrosion from moisture and dust ingress.
Innovation Solution
A fast-releasing controlling device with a pulling rod assembly connected to a swinging arm to convert curved motion into linear displacement, reducing tension force and incorporating sealed casings with waterproof gaskets for dust and moisture protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a turning arm presses onto the base with a fulcrum to swing in a curved manner, then the fast-releasing action can be achieved, but the direction of the applied forces changes continuously requiring larger force and causing less smooth operation
Solution Approach 1:
Instead of using a curved swinging motion with a fulcrum, the patent inverts the approach by using a linear pulling motion on the cable that directly translates to linear displacement of the turning arm through the pulling rod assembly, eliminating the need for curved motion and continuous force direction changes
Solution Approach 2:
The patent replaces the traditional curved swinging mechanical system with a cable-pulling system that uses tensile force directly applied to the turning arm, substituting the complex curved motion mechanism with a simpler linear pulling action that maintains constant force direction
2Ease of manufacture
If the base is provided with holes for allowing the insertion of the turning arm, then the turning arm can be installed, but moist or dust penetrates into the base causing corrosion and reduction in lifetime
Solution Approach 1:
The patent uses sealing elements such as O-rings or gaskets (flexible shells/films) to seal the base and prevent moisture and dust penetration, while still allowing for the installation and removal of the turning arm through sealed interfaces
Solution Approach 2:
The patent extracts the turning arm from the base through a sealed interface, allowing the turning arm to be installed and removed without compromising the seal of the base, thus preventing moisture and dust penetration while maintaining ease of assembly
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
The solution reduces the operational tension force and enhances durability by preventing corrosion, resulting in a more efficient and reliable fast-releasing mechanism for actuator control.
Implementation Method 1
a pulling rod assembly connected to a swinging arm to transfer the curved swinging movement into a linear displacement
Implementation Method 2
an elastic body to reduce the burden of pulling the cable
Implementation Method 3
waterproof gaskets are provided between the upper casing and the pulling rod, thereby to generate a better dust-proof, waterproof and moisture-proof effect within the casing
Data Source
AI summary
A fast-releasing controlling device of an actuator includes a clutching means, a turning means and a pulling means. The clutching means is accommodated within a base of the actuator, and includes a fixing base and a clutch. The turning means is accommodated within the casing of the actuator and includes a swinging arm pivoted to the base. One end of the swinging arm is arranged to correspond to the clutch so as to control clutching action of the clutch relative to the fixing base. The pulling means includes a pulling rod assembly. One end of the pulling rod assembly is accommodated within the casing and connected to the swinging arm, and the other end thereof penetrates out of the casing and is joined with a connecting block.