Hand-push leaf suction machine with automatic outage function for toppling
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Solution Overview
Problem
Existing leaf suction machines face efficiency issues due to a long passage between the leaf suction fan and the collecting box, and safety concerns arise when the machine is left unattended or during maintenance.
Innovation Solution
A hand-push leaf suction machine with an automatic outage function for toppling, featuring a housing with an air duct, a fan, a dust collecting box, ground and auxiliary wheels, and a push handle. The machine includes a micro switch and linkage mechanism that automatically turn off the fan when the machine tilts or is lifted, ensuring safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the leaf collecting box is located at the rear side of the leaf suction machine, then the structure is simplified, but the passage between the leaf suction fan and the leaf collecting box becomes long, reducing efficiency
Solution Approach 1:
The patent repositions the leaf collecting box from the rear side to the front side of the housing, fundamentally changing the spatial arrangement. This dimensional repositioning shortens the passage between the fan and collecting box, improving leaf transport efficiency while maintaining structural simplicity through the new front-mounted configuration
2Productivity
If the lower end of the air inlet passage is pressed close to the ground, then the suction force is improved, but the passage may touch the motor in the air duct requiring the housing to tilt backwards
Solution Approach 1:
The patent implements an automatic outage mechanism that detects when the housing tilts backwards (indicating the air inlet passage is touching the motor) and automatically shuts off the fan motor. This self-service safety feature allows the system to operate with the air inlet close to the ground for maximum suction force while automatically preventing damage when the tilt threshold is exceeded
3Productivity
If the fan operates continuously, then the leaf suction efficiency is maintained, but safety problems arise when the operator leaves or during maintenance
Solution Approach 1:
The patent implements multiple automatic outage mechanisms: (1) an automatic switch that shuts off the fan when the housing is lifted or topples, and (2) a manual switch accessible when the dust collecting box is removed. These self-service safety features ensure the fan cannot operate continuously, automatically shutting down in unsafe conditions while maintaining suction efficiency during normal operation
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 design improves wind strength and suction force by optimizing the air duct lengths, increases storage capacity in the dust collecting box, and ensures automatic shutdown for safety, enhancing both operational efficiency and user safety.
Implementation Method 1
the wheel axle slides off to the bottoms of the movable slots under the gravity
Data Source
AI summary
The present disclosure discloses a hand-push leaf suction machine with an automatic outage function for toppling which includes a housing provided with an air duct, a fan fixedly arranged in the housing, a dust collecting box, ground wheels arranged on two sides of the housing and supported on ground, auxiliary wheels arranged on two sides of the housing and supported on the ground, and a push handle arranged at a rear end of the housing.