Propulsion system with steered front wheel
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Solution Overview
Problem
Existing cleaning machines with single rear wheel configurations limit the types and positioning of cleaning implements, requiring operators to adjust to a different driving experience and restricting cleaning capabilities.
Innovation Solution
A propulsion system with a pair of independently driven rear wheels and a steerable front wheel or wheels, allowing for both propulsion and steering control, which mimics typical front-steered vehicle configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single rear drive/steered wheel is utilized, then the cleaning machine can accommodate broom and debris hopper for sweeping functionalities, but the front wheels become fixed and unable to rotate, requiring operators to adjust to a different driving experience
Solution Approach 1:
The patent inverts the traditional single rear wheel configuration by placing drive and steer capabilities on the front wheels instead. The front wheels are now powered by front motors and can be steered, while the rear wheels provide stability and support the cleaning implements. This inversion resolves the contradiction by restoring familiar front-steered driving experience while maintaining cleaning versatility.
2Device complexity
If a single rear wheel configuration is used, then the design is simplified, but the cleaning capabilities are limited with respect to types and positioning of cleaning implements
Solution Approach 1:
The patent segments the drive and steer functions from the rear wheel to the front wheels, allowing independent optimization of each wheel assembly. The front wheel assembly handles propulsion and steering, while the rear wheel assembly supports cleaning implements. This segmentation enables greater versatility in cleaning implement positioning without complicating the overall wheel configuration.
Solution Approach 2:
The front wheels serve multiple functions: they provide propulsion through front motors, enable steering through steerable mechanisms, and support the cleaning machine's weight. This multi-functionality allows the simplified two-wheel configuration to maintain or enhance cleaning capabilities compared to single rear wheel designs.
3Device complexity
If front wheels are fixed and unable to rotate, then the single rear wheel design is maintained, but operators must adjust to a different type of driving experience
Solution Approach 1:
The patent inverts the traditional configuration by making the front wheels the active drive and steer wheels rather than passive casters. This inversion restores the familiar front-steered driving experience that operators expect, while the rear wheels assume the supportive role. The front motors power the front wheels, and the steerable mechanism allows intuitive directional control.
Data Source
AI summary
A cleaning machine includes a driving assembly, a cleaning element, and a controller assembly. The driving assembly includes a pair of drive wheels, a rear motor, a multi-directional wheel, and a front motor. Each wheel of the pair of drive wheels is configured to be driven independently of the other wheel of the pair of drive wheels. The rear motor is operably coupled to the pair of drive wheels and is disposed to drive at least one wheel of the pair of drive wheels. The multi-directional wheel is disposed forward of the pair of drive wheels. The front motor is operably coupled to is disposed to steer the multi-directional wheel. The cleaning element is disposed forward of the pair of drive wheels. The controller assembly is disposed to control at least one of the rear motor, the front motor, or a combination thereof.