Electric Rescue Tool Gearbox for High Torque With Lower Weight
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Solution Overview
Problem
Existing rescue tools, such as 'Jaws of Life' devices, are heavy, inefficient, and have poor heat dissipation, making them difficult to handle and reducing their operational life.
Innovation Solution
A portable rescue tool powered by an electric motor with a drive output shaft connected to an angle rotary gearbox, which increases torque and reduces speed, combined with a single belt drive and a clutch mechanism to reduce weight and enhance manipulation, along with a braking assembly for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional rescue tools are used, then high torque is achieved, but weight increases and heat dissipation worsens
Solution Approach 1:
The patent replaces traditional hydraulic systems with an electric motor system. The electric motor directly generates high torque without requiring heavy hydraulic pumps, reservoirs, and fluid lines. This substitution of mechanical-hydraulic components with an electric drive system achieves the same torque output while significantly reducing overall tool weight.
Solution Approach 2:
The patent changes the operating parameters by using an electric motor with high starting torque capability. The motor is selected with specific torque characteristics that provide maximum torque at startup, eliminating the need for complex hydraulic multiplication systems. This parameter optimization allows direct coupling of the motor to the actuator, reducing weight while maintaining high force output.
2Force
If traditional rescue tools are used, then high torque is achieved, but heat dissipation worsens and motor life decreases
Solution Approach 1:
The patent replaces hydraulic systems with an electric motor system that has inherent superior heat dissipation characteristics. Electric motors generate heat that can be efficiently managed through direct air cooling of the motor housing and internal cooling channels, whereas hydraulic systems generate heat through fluid friction and compression that is harder to dissipate. This substitution improves thermal management and extends component life.
Solution Approach 2:
The electric motor system is designed with self-cooling capabilities through its housing structure and internal pathways. The motor housing itself serves as a heat sink and cooling channel, allowing heat generated during high-torque operation to be naturally dissipated without requiring external cooling systems. This self-service cooling approach maintains torque performance while managing temperature effectively.
3Force
If traditional rescue tools are used, then high torque is achieved, but device complexity increases
Solution Approach 1:
The patent replaces complex hydraulic systems with a simpler electric motor system. The electric motor requires no hydraulic fluid, pumps, valves, or reservoirs - just electrical connection and mounting. This substitution eliminates multiple components and connection points, reducing overall system complexity while maintaining the ability to generate high torque through the motor's electromagnetic field.
Solution Approach 2:
The electric motor serves multiple functions simultaneously: it generates torque, provides its own cooling, and requires no additional hydraulic infrastructure. This multi-functionality consolidates what would otherwise require separate hydraulic components into a single integrated unit, significantly reducing device complexity while maintaining high torque 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
The tool is lighter, more efficient, and has improved heat dissipation, allowing for easier handling and extended motor life while maintaining high torque for effective rescue operations.
Implementation Method 1
The angle rotary gear box has an output shaft that is oriented about 90 degrees from the rotational axis of the motor output shaft and is geared so as to increase the torque and reduce the speed of the rotational power.
Implementation Method 2
there is a brake assembly that directly contacts and provides a braking force to the motor shaft where the braking is the most effective
Data Source
AI summary
A portable rescue tool that is powered by an electric motor. The electric motor has a drive output shaft that transfers rotational power to an angle rotary gearbox. The angle rotary gearbox has an output shaft that is oriented about 90 degrees from the rotational axis of the motor output shaft and is geared so as to increase the torque and reduce the speed of the rotational power. The angle rotary gearbox provides a reduced speed, high torque output at an output shaft that is delivered by a single chain drive to a main rotary actuator where two actuator arms are controlled to move away from each other and toward each other in the operation of the rescue tool. The portable rescue tool is designed to be of a low weight and enhanced cooling properties as present rescue tools.