Operating Rod Wiring Space for Electric Working Machine Safety
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Solution Overview
Problem
Conventional electric working machines with operating rods face challenges in implementing safety measures due to the heaviness of the head end, which increases the load on the user and complicates electrical detection for stopping the motor when the electric motor is placed at the base end, causing difficulties in safely operating the device.
Innovation Solution
The electric motor is relocated to the base end of the operating rod, with a power transmission shaft passing through the rod to transmit power to the head-end working device, and a lead wire is laid within a wiring space around the shaft, allowing for pull-out holes to connect detection switches, enabling easy electrical detection of the working device's posture and implementing safety measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the electric motor is placed on the base end of the operating rod, then the head end weight is reduced, but it becomes difficult to implement safety measures through electrical detection
Solution Approach 1:
The patent divides the operating rod into functional segments: the base end houses the electric motor and battery, the middle section contains the power transmission shaft and wiring space, and the head end accommodates the working device. This segmentation allows the motor to be positioned at the base end for weight reduction while maintaining electrical detection capability through separate wiring pathways and detection switches positioned near the head end.
Solution Approach 2:
The patent introduces a lead wire as an intermediary element that runs through the operating rod from the base end to the head end. This lead wire connects the electric motor and detection switches to the controller, enabling electrical detection and safety measures even when the motor is positioned at the base end, thus mediating between the motor position and safety detection requirements.
2Ease of operation
If the electric motor is placed on the base end of the operating rod, then operational load on the user is decreased, but electrical detection for stopping the motor becomes complicated
Solution Approach 1:
The operating rod is designed as a multi-functional structure that simultaneously serves as a mechanical power transmission element and an electrical conduit. The lead wire embedded within the rod structure allows the same physical space to handle both mechanical power transmission through the power transmission shaft and electrical signaling for safety detection, reducing overall system complexity despite the motor's base end position.
Solution Approach 2:
The patent implements a feedback mechanism where detection switches positioned near the head end continuously monitor the operating state and transmit signals through the lead wire to the controller at the base end. This feedback system automatically stops the motor when unsafe conditions are detected, simplifying the electrical detection process by using automatic control rather than manual intervention.
3Power
If a power transmission shaft passes through the inside of the operating rod, then power transmission from base end to head end is achieved, but wiring space for the lead wire is reduced
Solution Approach 1:
The patent employs a nested arrangement where the lead wire is positioned within the wiring space that surrounds the power transmission shaft. The wiring space forms a concentric annular region between the power transmission shaft and the outer wall of the operating rod, allowing both the power transmission shaft and lead wire to coexist within the same cylindrical volume without interfering with each other.
Data Source
AI summary
An electric working machine with an operating rod includes an electric motor provided on the base end of the operating rod, a working device provided on the head end of the operating rod, and 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. The operating rod includes a wiring space around the power transmission shaft to lay a lead wire. The lead wire is laid along a longitudinal direction of the power transmission shaft. The operating rod also includes a plurality of pull-out holes to pull connecting terminals of the lead wire out from itself.