Cleaning machine with roller housing

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Solution Overview

Problem

Existing cleaning machines do not allow for easy and tool-free exchange of cleaning rollers, complicating maintenance and replacement processes.

Innovation Solution

A design featuring a pivotable bracket with receptacles for convex holding bodies on the roller housing, enabling simple locking and unlocking of the cover, allowing for easy exchange of cleaning rollers without the need for tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a conventional fixed cover design is used on the roller housing, then the structure is simple and stable, but the cleaning roller cannot be exchanged easily and requires tools

Engineering Contradiction:
Improveease of cleaning roller exchangeVSAvoidcomplexity of locking mechanism
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The cover is designed with a pivotable bracket that can dynamically change position between locked and unlocked states. The bracket pivots about a pivot axis, allowing the cleaning roller to be securely held during operation and easily released when needed, transforming a static cover into a dynamic locking system.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

A pivotable bracket serves as an intermediary mechanism between the cover and the cleaning roller. The bracket includes a receptacle that receives a convex holding body on the roller housing, mediating the locking action and enabling tool-free exchange while maintaining structural simplicity.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If a secure locking mechanism is implemented to fix the cover, then the cleaning roller is held firmly, but the exchange process becomes complicated and time-consuming

Engineering Contradiction:
Improvesecurity of cover fixationVSAvoidtime for roller replacement
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The pivotable bracket provides a dynamic locking solution where a single pivoting motion simultaneously achieves both secure fixation during operation and rapid release for exchange. The held position provides reliable locking, while the unlocked position enables quick removal without time-consuming manual operations.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The user can independently pivot the bracket between locked and unlocked positions without requiring tools or assistance. The self-contained pivoting mechanism allows the user to quickly secure or release the cleaning roller through simple manual action, minimizing replacement time.

Inventive Principle:
Principle #25Self-service

3Reliability

If multiple components are used for the locking mechanism, then the locking function is robust, but the number of components increases and simplifies the structure

Engineering Contradiction:
Improverobustness of locking functionVSAvoidnumber of components
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The locking mechanism merges multiple functions into a single pivotable bracket component. The bracket simultaneously provides the locking surface, the pivoting motion, and the release mechanism, eliminating the need for separate locks, keys, or complex fastening systems while maintaining robust locking functionality.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The pivotable bracket serves multiple functions: it acts as a locking element when in the locked position, provides structural support for the cover, and enables rapid release when pivoted to the unlocked position. This multi-functionality reduces the overall component count while maintaining reliable locking.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP3826520B1Cleaning machine with roller housing
Publication Date: 2022.09.07 ALFRED KARCHER SE & CO KG
  • EP3826520B1 patent drawingFigure 1
  • EP3826520B1 patent drawingFigure 2
  • EP3826520B1 patent drawingFigure 3

AI summary

The invention relates to a cleaning machine, comprising at least one cleaning roller (46), a roller housing (14) having a roller receptacle (42) for the at least one cleaning roller (46), wherein the at least one cleaning roller (46) is exchangeably positioned on the roller housing (14) and the roller receptacle (42) has an opening (54) to the outside, a cover (64) for closing the opening (54), and a locking device (115) for fixing the cover on the roller housing (14). At least one convex holding body (86, 90) is arranged on the roller housing (14). A pivotable bracket (69) is arranged on the cover (64), and on the pivotable bracket (69), at least one receptacle (84, 88) for the at least one holding body (86, 90) is arranged. In a release position (118) of the pivotable bracket (69), the at least one holding body (86) can be immersed into the associated receptacle (84) and/or can emerge from the associated receptacle (84). In a locking position (114) of the pivotable bracket (69), an emergence of the holding body (86) from the associated receptacle (84) is blocked.