Zero-Turn Mower Handle Control for Stable Two-Hand Steering
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Solution Overview
Problem
The existing electric-driven standing zero-turn mowers require operators to constantly switch hands between control levers for direction changes, causing inconvenience and instability during operation.
Innovation Solution
A mower design with a supporting part for both hands and operating parts that detect hand movements to control speed and steering, using potentiometers to generate voltage signals for forward/backward, turning, and zero-turn instructions, with safety switches for secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional control levers are used for direction changes, then steering control is achievable, but operator convenience deteriorates due to constant hand switching between control levers
Solution Approach 1:
The patent combines both control functions (forward/reverse and steering) into a single operating part that the operator holds with both hands. This merging eliminates the need to switch between separate control levers, allowing the operator to perform all control operations from one unified interface, thereby improving convenience and reducing hand switching time.
Solution Approach 2:
The operating part serves multiple functions simultaneously: it controls forward/reverse movement and steering direction. By making the operating part universal and multi-functional, the design eliminates the need for separate control levers for different operations, resolving the contradiction between steering control capability and operational convenience.
2Measurement precision
If separate control levers are used for zero-turn operation, then precise steering control is achievable, but operator convenience deteriorates due to reverse direction operation requirement
Solution Approach 1:
The patent inverts the traditional control approach by using same-direction operations of both operating parts for zero-turn maneuvers instead of requiring reverse operations. When both operating parts are rotated in the same direction, the mower performs a zero-turn in that direction, making the operation more intuitive and convenient while maintaining precise steering control.
Solution Approach 2:
The patent changes the operational parameters and control logic to enable zero-turn functionality. By detecting the rotation direction and amplitude of both operating parts and processing these signals through the controller, the system achieves precise zero-turn control without requiring the operator to perform complex reverse operations.
3Stability of the object's composition
If both hands hold the supporting part for balance, then operator stability is improved, but control operation becomes more difficult due to limited hand movement range
Solution Approach 1:
The operating parts are designed to be nested within or integrated into the supporting part structure. The operating parts can be rotated or adjusted within the confines of the supporting part, allowing full control functionality while the operator maintains a stable two-handed grip on the outer supporting structure. This nested arrangement enables both stability and operational ease.
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 allows for convenient and safe control with small hand movements, maintaining operator balance and stability by simplifying the control process.
Implementation Method 1
the detection component is a potentiometer sensor which can generate different displacements and output corresponding voltage values according to the amplitude of the hand operation
Data Source
AI summary
The disclosure provides a mower and a steering control method thereof. The mower includes a main body, a supporting part, and an operating part. The main body includes at least one driving wheel and a motor and the motor drives the driving wheel to move. The supporting part is connected to the main body for the operator to hold with both hands. The operating part is used to adjust the rotation speed and/or steering of the motor, the operating part is connected to the supporting part, and the operating part is configured to be operated when the operator holds the supporting part.