Single Controller Pneumatic Tool for Direction and Speed
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Solution Overview
Problem
Conventional pneumatic tools require separate controllers for forward/reverse switching and speed adjustment, leading to a complex and inconvenient design that is not user-friendly for both left- and right-handed users.
Innovation Solution
A pneumatic tool with a single controller that integrates forward/reverse switching and speed adjustment capabilities, utilizing a control valve with multiple positions and paddles for easy operation, allowing users to switch directions and adjust speed using a single controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate controllers (forward/reverse switching lever and rotation-rate adjuster dial) are used for direction switching and speed adjustment, then both functions can be controlled, but the control structure becomes complicated and inconvenient to use
Solution Approach 1:
The patent combines the forward/rereverse switching lever and the rotation-rate adjuster dial into a single integrated controller. This controller has a pushing rod with a trigger that can perform both direction switching and speed adjustment functions, eliminating the need for separate controllers and simplifying the overall control structure.
Solution Approach 2:
The single controller is designed to perform multiple functions: it can switch the motor between forward and reverse rotation directions, and simultaneously adjust the rotation rate of the output shaft. This multi-functional design reduces the number of components and simplifies the control mechanism.
2Adaptability or versatility
If a forward/reverse switching lever with repositionable paddle is used to accommodate both left-handed and right-handed users, then usability is improved, but the mechanism becomes complicated requiring pulling and rotating operations
Solution Approach 1:
The patent merges the forward/rereverse switching function with the rotation-rate adjustment function into a single controller with a unified operating mechanism. The controller has a pushing rod with a trigger that can be operated in the same way by both left-handed and right-handed users, eliminating the need for complex repositioning mechanisms.
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 simplifies the tool's structure and operation, enabling easy use by both left- and right-handed users without the need for conversion, making it more convenient and user-friendly while maintaining effective motor control.
Implementation Method 1
a first compressed air inlet communicated with the installation tunnel and a second compressed air inlet communicated with the installation tunnel; the control valve has an air incoming channel communicated with the air supplying channel, and an air supplying hole communicated with the air incoming channel
Implementation Method 2
a motor installed in the housing, an output shaft extending out the housing and driven by the motor
Data Source
AI summary
A pneumatic tool includes a housing that contains an installation tunnel, an air supplying channel and first and second air inlets, a control valve installed in the installation tunnel for shifting among first, second and third positions; a controller that is mounted on the control valve and has two paddles; a pushing rod that passes through the controller and the control valve; and a trigger that is attached to the pushing rod. The pneumatic tool provides the controller for a user to selectively operate with his/her left hand or right hand to perform forward/reverse switching and speed adjustment.