Pivoting Front Frame Riding Mower for Deck Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mid-mount riding mowers face difficulties in maintenance accessibility due to their compact design, leading to inadequate service and potential safety hazards, and existing solutions are costly and not retrofittable, while their suspension systems result in uneven cutting and rough rides on uneven terrain.
Innovation Solution
A self-propelled lawn mower design with a pivotally mounted front frame, swing arms, and telescoping push arms allows for easy deck access and maintenance, featuring gauge wheels for ground contour following and shock absorption to ensure even cutting and smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the mower uses a compact mid-mount design, then the footprint size is reduced, but the maintenance accessibility deteriorates
Solution Approach 1:
The front castor assembly is designed to be movable between a forward position during operation and a retracted position during maintenance. This dynamic reconfiguration allows the compact mid-mount design to provide both compact footprint during mowing and improved maintenance accessibility when needed, resolving the contradiction between compact size and serviceability.
Solution Approach 2:
The solution moves the castor wheels from a fixed position to a reconfigurable position, utilizing spatial reconfiguration in the longitudinal dimension. By retracting the front castor assembly, the maintenance space is created without increasing the overall footprint dimensions, thus resolving the contradiction between compact size and maintenance accessibility.
2Stability of the object's composition
If the front castor wheels are solidly attached to a rigid frame, then the structural stability is improved, but the ride smoothness on uneven ground deteriorates
Solution Approach 1:
The front frame is designed to pivot relative to the rear frame, allowing dynamic adaptation to uneven terrain. This pivoting capability enables the front castor wheels to follow ground contours independently, improving ride smoothness while maintaining structural stability through the controlled pivot mechanism.
Solution Approach 2:
The relative position between front and rear frames is changed from fixed to variable through pivoting. This parameter change allows the front frame to adjust its orientation in response to terrain variations, improving ride comfort while preserving overall structural integrity.
3Ease of operation
If the front castor wheels are mounted on a pivoting axle, then the ride smoothness on uneven ground is improved, but the deck cutting evenness deteriorates
Solution Approach 1:
The mower is segmented into independently movable front and rear frame assemblies. The front frame can pivot to follow terrain contours, isolating this motion from the rear-mounted deck. This segmentation allows the front castor wheels to adapt to uneven ground without transmitting disruptive movements to the cutting deck, thereby maintaining both ride smoothness and cutting evenness.
Solution Approach 2:
The pivoting connection between front and rear frames acts as an intermediary that decouples the terrain-following motion of the front castors from the rear deck assembly. This intermediary mechanism allows the front wheels to adapt to ground variations while preventing these variations from affecting deck cutting evenness.
4Ease of operation
If hydraulic cylinders or electric screw actuators are used to hinge the deck forward, then the maintenance accessibility is improved, but the device complexity and cost increase
Solution Approach 1:
The front castor assembly is designed to be manually movable by the operator without requiring hydraulic cylinders or electric actuators. This self-service design allows the operator to easily reposition the front wheels for maintenance access, improving accessibility while avoiding the complexity and cost of powered actuation systems.
Solution Approach 2:
The solution replaces expensive, complex hydraulic or electric actuation systems with a simple, manually-operated mechanical design. This approach uses basic mechanical components that are inexpensive and easy to maintain, resolving the contradiction between maintenance accessibility and system complexity/cost.
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 enhances maintenance accessibility, reduces safety risks, and provides a smoother ride and even cutting performance on uneven terrain, making it suitable for both residential and commercial use.
Implementation Method 1
The mower includes shock absorbers to provide a smooth ride
Implementation Method 2
featuring gauge wheels for ground contour following
Data Source
AI summary
A mid-mount riding rotary mower which has a two-piece frame. The frame includes a front section that is pivotally connected to a rear section. The mower deck is carried beneath the mower between the front and rear wheels and is attached to the front frame and follows the movement of the front wheels. The front frame includes swing arms that allow the front wheels to spread open and be clamped for different operating conditions. The mower deck can be removed from underneath the mower when the arms are fully spread.