Mower Blade Height Adjustment With Clutch Overload Protection
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Solution Overview
Problem
Conventional mowers require manual adjustment of cutter height, lacking intelligence and resulting in a poor user experience.
Innovation Solution
A mower with a height adjustment system that includes a height adjustment motor, gear assembly, clutch assembly, and cutter motor assembly, allowing for automatic adjustment of the blade height relative to the working surface, featuring a connecting shaft and elastic component to prevent motor overload, and a controller for monitoring and controlling the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual adjustment of cutter height is used, then the structure is simple, but the intelligence and user experience are poor
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated motor-driven system. The height adjustment motor (210) automatically drives the gear assembly (220) and adjustment rod (251) to adjust blade height, eliminating the need for manual operation while improving intelligence and user experience.
Solution Approach 2:
The system enables self-service height adjustment through automatic control. The controller (400) automatically controls the height adjustment motor (210) to adjust the blade height according to working conditions, allowing the mower to service itself without manual intervention.
2Reliability
If the adjustment rod continuously drives the gear assembly, then the height adjustment is smooth, but the motor may be overloaded when the blade hits obstacles
Solution Approach 1:
The patent introduces dynamic coupling between the adjustment rod (251) and gear assembly (220) through the clutch assembly (230). The connecting shaft (232) can be coupled to or separated from the gear assembly (220) based on operational needs, allowing the system to adapt dynamically to different working conditions and prevent motor overload while maintaining smooth operation during normal adjustment.
Solution Approach 2:
The clutch assembly (230) with connecting shaft (232) acts as an intermediary between the adjustment rod (251) and gear assembly (220). This intermediary component allows the adjustment rod to drive the gear assembly during normal operation but can disengage when obstacles are detected, protecting the motor from overload while maintaining operational smoothness.
3Power
If the connecting shaft is always connected to the gear assembly, then the power transmission is efficient, but the motor cannot be protected from obstacle forces
Solution Approach 1:
The patent implements dynamic connection between the connecting shaft (232) and gear assembly (220) through the clutch assembly (230). During normal operation, the connecting shaft is connected to the gear assembly for efficient power transmission. When the blade encounters obstacles, the system can separate the connection to protect the motor from damage, thus adapting power transmission efficiency to operational conditions.
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
Enables automatic and intelligent adjustment of blade height, preventing motor damage and extending its lifespan while improving user experience.
Implementation Method 1
the elastic component is arranged between the connecting shaft and the outer frame to keep the connecting shaft accommodated in the overlapping part of the first limiting groove and the second limiting groove
Data Source
AI summary
A mower includes a main body, a height adjustment motor, a gear assembly, a clutch assembly and a cutter motor assembly. The height adjustment motor drives the gear assembly to rotate through the clutch assembly. The clutch assembly includes a connecting shaft movably connected with the height adjustment motor to achieve a separation and an engagement of the height adjustment motor and the gear assembly. The cutter motor assembly includes an adjustment rod, the adjustment rod is connected with the gear assembly and can be lifted and lowered reciprocally under a drive of the gear assembly to drive a blade to be lifted and lowered reciprocally. The adjustment rod is provided with an end part abutting the gear assembly to limit a rotation of the gear assembly, so that the height adjustment motor is separated from the connecting shaft.