Operating Rod Motor Placement and Posture Detection
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Solution Overview
Problem
Conventional electric working machines with operating rods face challenges in implementing safety measures to stop the electric motor due to the concentration of electric components at the base end, making it difficult to detect the storage posture of the working device effectively.
Innovation Solution
The electric motor is placed at the base end of the operating rod, and a power transmission shaft transmits power to the working device at the head end, with a detection switch and lead wire system to prevent motor operation when the working device is in a storage posture, allowing for safe electrical detection and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the electric motor is placed at the head end of the operating rod, then the working device can be driven effectively, but the head end becomes heavy increasing operational load and user fatigue
Solution Approach 1:
The patent divides the operating rod into functionally independent segments: the electric motor and battery are placed in the base end section while the working device is at the head end, connected through a power transmission shaft. This segmentation allows the heavy power components to be separated from the working device, reducing head end weight while maintaining full driving capability.
2Weight of moving object
If electric components are concentrated at the base end of the operating rod, then the head end weight is reduced, but it becomes difficult to implement safety measures and detect storage posture effectively
Solution Approach 1:
The patent introduces a detection switch as an intermediary component located at the head end near the working device. This switch detects the storage posture (whether the working device is folded or extended) and transmits signals through a lead wire to the controller at the base end, enabling safety control despite the spatial separation of electric components.
3Weight of moving object
If a power transmission shaft is used to transmit power from base end to head end, then the electric motor can be placed at the base end reducing head end weight, but the transmission system becomes more complex
Solution Approach 1:
The patent extracts the heavy electric motor and battery from the head end and places them at the base end, using a power transmission shaft to deliver power remotely. This extraction eliminates the need for heavy batteries at the head end while maintaining driving capability, and the lead wire system is extracted to transmit control signals independently from the power transmission path.
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
This configuration reduces the weight of the head end of the operating rod, decreases operational load, and enables reliable safety measures by preventing the electric motor from being driven during incorrect operation, thus enhancing user safety and reducing fatigue during mowing tasks.
Implementation Method 1
a power transmission shaft passing through the inside of the operating rod. This power transmission shaft is configured to transmit power from the electric motor to the working device
Implementation Method 2
A detection switch is provided on the head end of the operating rod to detect the storage posture. A lead wire is provided in the operating rod to transmit a detection signal from the detection switch to the controller
Implementation Method 3
A controller is provided on the base end of the operating rod to control the operation of the electric motor. The controller is configured to prevent the electric motor from being driven when the detection switch detects the storage posture of the working device
Data Source
AI summary
An electric working machine with an operating rod includes an electric motor on the base end of the operating rod, a working device on the head end of the operating rod, and a power transmission shaft passing through the inside of the operating rod to transmit power from the electric motor to the working device. The working device includes a blade member and is pivotally supported on the head end of the operating rod to be able to take a storage posture. A detection switch on the head end of the operating rod detects the storage posture. A controller on the base end of the operating rod controls the operation of the electric motor. A lead wire in the operating rod transmits a detection signal from the detection switch to the controller. The controller prevents the electric motor from being driven when the detection switch detects the storage posture.