Propulsion system for cleaning machines
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Solution Overview
Problem
Existing cleaning machines with single rear wheel configurations require operators to adjust to a different driving experience and limit the types and positioning of cleaning implements.
Innovation Solution
A cleaning machine with a drive assembly featuring independently controlled rear drive wheels and a pair of front caster wheels, where the multi-directional wheel can swivel 360° to provide improved steering and cleaning capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single rear drive/steered wheel is utilized, then the cleaning machine can be designed for sweeping functionalities with broom and debris hopper, but the front wheels become fixed and unable to rotate, requiring operators to adjust to a different driving experience and limiting cleaning capabilities
Solution Approach 1:
The wheel configuration is segmented into two distinct types: fixed rear drive wheels for propulsion and steerable front caster wheels for direction control. This segmentation allows each wheel type to be optimized for its specific function, with the front wheels being independently steerable to provide familiar driving experience while the rear wheels remain fixed for stable propulsion
Solution Approach 2:
The patent inverts the traditional single rear-steered wheel configuration by placing steerable wheels at the front and fixed drive wheels at the rear. This inversion allows the front wheels to be steered independently, providing operators with a familiar driving experience similar to conventional vehicles, while maintaining the sweeping functionalities at the rear
2Device complexity
If a single rear wheel configuration is used, then the structure is simplified, but the cleaning capabilities with respect to types and positioning of cleaning implements are limited
Solution Approach 1:
The front caster wheels serve multiple functions: they provide steerable support for the front of the machine and can be positioned to accommodate various cleaning implements. The independently steerable front wheels create versatile mounting positions for cleaning elements, allowing the same basic chassis to support different cleaning configurations for various applications
3Device complexity
If front wheels are fixed and unable to rotate, then the single rear wheel design is maintained, but the cleaning machine cannot accommodate versatile cleaning implement positioning
Solution Approach 1:
The front wheels are designed with dynamic steerable capability, allowing them to rotate and change direction independently. This dynamic feature enables the front wheels to accommodate various cleaning implement positions and orientations, providing versatility for different cleaning tasks while maintaining a relatively simple overall wheel configuration
Data Source
AI summary
A cleaning machine for cleaning along an intended direction of use includes a drive assembly, a cleaning element, and a multi-directional wheel. The Drive assembly includes a motor and a pair of drive wheels operable connected to the motor. Each wheel of the pair of wheels can be configured to be driven independently of the other wheel. The cleaning element can be disposed forward of the pair of drive wheels along the intended direction of use of the cleaning machine. The multi-directional wheel disposed forward along the intended direction of use of the pair of drive wheels. The multi-directional wheel can define a pivot axis and can be configured to swivel about the pivot axis in a range of direction extending 360°.