Surface cleaning machine and method for operating a surface cleaning machine

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Solution Overview

Problem

Existing surface-cleaning machines face challenges in achieving comprehensive cleaning capabilities while maintaining a simple structural design, efficient dirt removal, and easy operation, particularly in accessing hard-to-reach areas and managing the positioning of drive motors for a low center of gravity.

Innovation Solution

The surface-cleaning machine features a drive motor axis oriented transversely to the cleaning roller axis, allowing for space-saving design, easy handling, and reduced dirt accumulation, with a transmission device including a rotational speed reducer and angular gearing for optimized torque transmission, and a pivotable cleaning head for accessing corners and edges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the drive motor is positioned to achieve a low center of gravity, then the machine becomes easier to handle and more stable, but the structural complexity increases due to transverse orientation requirements and transmission device needs

Engineering Contradiction:
Improveease of handlingVSAvoidstructural complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The drive motor is positioned transverse to the cleaning head rather than longitudinally, changing the spatial dimension of motor placement. This transverse orientation allows the motor to be located lower on the appliance body, achieving a low center of gravity and improved handling, while the transmission device bridges the dimensional gap between the motor shaft and cleaning roller axes

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

A transmission device acts as an intermediary between the drive motor and the cleaning roller. This transmission mechanism (comprising gears, belts, or chains) mediates the power transfer from the motor shaft to the cleaning roller, enabling the motor to be positioned transverse to the cleaning head while still delivering rotational drive force effectively

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of manufacture

If the drive motor is positioned transverse to the cleaning roller axis for space-saving design, then the cleaning head can be simplified and dirt accumulation on the motor is reduced, but a transmission device is required which increases device complexity

Engineering Contradiction:
Improvecleaning head simplicityVSAvoidtransmission device complexity
Core Design Contradiction:
Ease of manufactureVSDevice complexity

Solution Approach 1:

The cleaning head is designed as a separate, modular unit that can be manufactured independently and attached to the appliance body. This segmentation allows the cleaning head to be produced with simple construction (without integrated motor complications) while the transmission device handles the complexity of power transfer between the motor and cleaning roller

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The transmission device serves as an intermediary that decouples the motor positioning from the cleaning head construction. By placing the transmission mechanism between the motor and cleaning roller, the cleaning head can be manufactured simply without housing the motor, while the transmission device manages the complexity of the power transfer relationship

Inventive Principle:
Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the cleaning head is made pivotable to access corners and edges, then cleaning versatility is improved, but the structural complexity and potential reliability issues increase

Engineering Contradiction:
Improvecleaning accessibilityVSAvoidjoint mechanism complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The cleaning head is designed with a pivotable joint that allows it to dynamically change its angular position relative to the appliance body. This dynamic capability enables the cleaning head to access corners and edges by pivoting to appropriate angles, while the joint mechanism maintains a relatively simple structure that can withstand the mechanical stresses of cleaning operations

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS10881258B2Surface cleaning machine and method for operating a surface cleaning machine
Publication Date: 2021.01.05 ALFRED KARCHER SE & CO KG
  • US10881258B2 patent drawing
  • US10881258B2 patent drawing
  • US10881258B2 patent drawing

AI summary

A surface-cleaning machine is provided, including an appliance body on which a suction apparatus device is arranged, a cleaning head on which at least one cleaning roller is arranged and on which there is positioned at least one suction mouth, which is fluidically connected to the suction apparatus device and is associated with the at least one cleaning roller, and a drive device for driving the at least one cleaning roller in rotation, wherein a drive axis of a drive motor of the drive device and an axis of rotation of the at least one cleaning roller are oriented transversely and in particular perpendicularly with respect to one another.