Riding Lawn Mower Parking Linkage for One-Step Brake Locking
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Solution Overview
Problem
The existing parking mechanisms of riding lawn mowers are complicated in structure and difficult to operate, making them inconvenient for users.
Innovation Solution
A simplified parking mechanism for riding lawn mowers, featuring a trigger assembly with a rotatable parking trigger, a pull rod assembly, and a pedal brake assembly, allowing for easy engagement and disengagement of parking positions through a single-step operation using a pedal and trigger paddle, with two alternative parking positions to accommodate different user preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple mechanical switches are used to control parking and braking, then the control functions are complete, but the operation structure becomes complicated and difficult to operate quickly
Solution Approach 1:
The patent combines multiple control functions (parking and braking control) into a single integrated pedal mechanism. The pedal lever simultaneously controls both the parking trigger assembly and the brake mechanism, eliminating the need for separate mechanical switches and simplifying the operation structure while maintaining complete control functionality.
Solution Approach 2:
The pedal lever serves multiple functions: it acts as both the brake control mechanism and the parking control mechanism. By designing the pedal lever to simultaneously engage the brake mechanism and the parking trigger assembly, the system achieves multi-functionality in a single component, reducing operational complexity.
2Ease of operation
If a simple pedal mechanism is used, then the operation is simplified, but the reliability of parking engagement may be compromised
Solution Approach 1:
The parking trigger assembly is designed with a trigger paddle that can be preliminarily engaged by the pedal mechanism. When the pedal is pressed, it first activates the brake mechanism and simultaneously prepares the parking trigger for engagement. This preliminary action ensures that the parking mechanism is ready to engage reliably once the pedal operation is completed, maintaining both simplicity and reliability.
Solution Approach 2:
The patent introduces a connecting rod as an intermediary component between the pedal lever and the parking trigger assembly. This connecting rod transmits the force from the pedal operation to the parking trigger, ensuring reliable engagement while maintaining the simplicity of the pedal mechanism. The intermediary component allows the simple pedal to effectively control the more complex parking engagement process.
Data Source
AI summary
A parking mechanism of a riding lawn mower includes a trigger assembly, a pull rod assembly, a pedal brake assembly, a connecting rod and a gearbox. When the pedal part is stepped down, it is capable of driving the connecting rod clamping plate, the connecting rod and the disc brake mechanism of the gearbox in sequence to make the gearbox in a shutdown state, and at the same time, is capable of driving a parking lower clamping plate to rotate to the clamping position; when the pedal part is stepped down, the trigger paddle in the parking position is capable of rotating to the non-parking position, which is capable of driving the parking pull rod to pull the parking upper clamping plate to rotate to be separated from the parking lower clamping plate in the clamping position.