Mower Weight Transfer Arm for Traction and Ground Following
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Riding mowers are not effectively suited for year-round use due to inadequate traction and weight distribution on snowy and icy surfaces, leading to inefficiencies in snow removal and mower maintenance costs, with existing solutions requiring separate equipment for mowing and snow removal.
Innovation Solution
A convertible mower and tracked implement using a common drive unit with adjustable weight transfer and suspension systems to optimize traction and ground following, featuring a pivotable weight transfer arm and torsion spring for weight distribution, and a simple idler support system to prevent track elongation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a riding mower is used for snow removal operations, then the mower can perform dual duty during winter, but the traction is insufficient on snowy and icy surfaces
Solution Approach 1:
The patent applies dynamics by making the weight distribution system adjustable rather than fixed. The weight transfer mechanism allows the operator to dynamically shift weight between the front and rear of the mower to optimize traction conditions. This is achieved through a hydraulic or mechanical weight transfer system that can redistribute the mower's mass in real-time based on operational needs, whether mowing on dry surfaces or snow removal on icy surfaces.
Solution Approach 2:
The patent changes the parameter of weight distribution by incorporating a weight transfer mechanism that can alter the center of gravity position. This allows the mower to adjust its weight parameters adaptively - shifting weight forward for better traction during snow removal, or maintaining original distribution for mowing operations. The system modifies physical parameters (weight position, traction force) to resolve the contradiction between versatility and reliability.
2Reliability
If weight is added to the front of the mower for snow removal, then traction improves, but the drive wheels are lifted off the ground reducing traction
Solution Approach 1:
The patent employs counterweight principles by using a weight transfer mechanism that can shift mass distribution to compensate for the effects of front-mounted attachments. When snow removal equipment is attached to the front, the weight transfer system redistributes weight to maintain proper drive wheel contact with the ground, preventing the drive wheels from lifting off. This counterbalancing action maintains stability while allowing the necessary front weight for traction.
Solution Approach 2:
The patent makes the weight distribution dynamic rather than static. The weight transfer mechanism allows real-time adjustment of mass distribution to maintain optimal weight balance on the drive wheels. This dynamic adjustment prevents the drive wheels from lifting off the ground when front attachments are used, while still providing adequate front weight for snow removal traction.
3Strength
If a heavy cutting deck is used, then durability improves, but ground following capability deteriorates
Solution Approach 1:
The patent applies counterweight principles through the weight transfer mechanism to offset the excessive weight of the heavy cutting deck. By transferring appropriate amounts of weight from the front to the rear of the mower, the system counterbalances the deck's mass, allowing the deck to maintain ground following capability while retaining its durability benefits. The counterweight system enables the heavy deck to adapt to terrain variations without compromising strength.
Solution Approach 2:
The patent makes the weight distribution dynamic to accommodate the heavy cutting deck. The weight transfer mechanism allows real-time adjustment to compensate for the deck's mass, enabling the mower to maintain proper ground following capability. This dynamic adjustment ensures that the heavy deck can follow terrain contours effectively while preserving its durability advantages.
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 cost-effective dual functionality for mowing and snow removal with improved traction and durability, reducing the need for separate equipment and maintaining operational efficiency across different conditions.
Implementation Method 1
A spring is provided to bias the weight transfer arm upwardly to transfer a portion of the weight of the cutting deck to the frame
Implementation Method 2
featuring a pivotable weight transfer arm and torsion spring for weight distribution
Data Source
AI summary
This invention relates to a mower and a tracked implement that convert from one to the other by coupling a mower unit or a tracked unit to a common drive unit. The drive unit is thus used in both products to provide cost savings in the purchase of the equipment. In the tracked unit, a cab for enclosing the operator's station is part of the tracked unit and gets mounted to the drive unit when the tracked unit is coupled to the drive unit. A pair of idlers rotate on pivot axes that are fixed relative to a pivotal idler support that carries the idlers. The pivot point for the idler support is chosen to prevent track elongation when the tracked unit climbs obstructions such as a curb. In the mower unit, a relatively heavy cutting deck is used and spring biased weight transfer arms transfer some of the deck weight to the mower frame.