Cleaning Roller Fixing Device with Rotation-Independent Bayonet Lock
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Solution Overview
Problem
Existing cleaning devices face difficulty in handling when replacing cleaning rollers due to the need to consider the direction of rotation, especially when multiple rollers with opposite rotation directions are present.
Innovation Solution
A fixing device with a guide body and a rotating body that allows the holding arm to move between locking and release positions through a 90° rotation, independent of the cleaning roller's direction, facilitating easy attachment and detachment of the cleaning roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded fixing device is used to secure the cleaning roller to the drive shaft, then the cleaning roller is firmly fixed, but the handling becomes difficult when replacing rollers with opposite rotation directions
Solution Approach 1:
The fixing device transitions from a static threaded connection to a dynamic bayonet-style locking mechanism. The rotating body with holding arms allows the user to switch between locked and unlocked states through a simple rotational motion, eliminating the need to consider thread direction while maintaining secure fixation during operation.
Solution Approach 2:
Instead of using a threaded connection where the fixing direction depends on rotation direction, the invention inverts the approach by using a bayonet-style locking mechanism where the locking action is independent of the roller's rotation direction. The holding arms engage with the drive shaft through a rotational insertion motion rather than threading.
2Reliability
If a threaded fixing device is used, then axial fixing is achieved, but the device complexity increases due to thread direction requirements
Solution Approach 1:
The fixing device is designed as a universal solution that works with cleaning rollers of any rotation direction. The rotating body with holding arms provides a single standardized interface that fulfills the axial fixing function regardless of the roller's operational rotation, eliminating the need for different thread configurations.
Solution Approach 2:
The fixing mechanism uses dynamic holding arms that can be positioned into or out of engagement with the drive shaft through rotation. This dynamic approach replaces the static threaded connection, reducing device complexity by eliminating thread direction requirements while maintaining reliable axial fixing when locked.
Data Source
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AI summary
The invention relates to a cleaning device for cleaning a surface, comprising a drive device (50), a drive shaft (62) which can be driven to rotate about a rotation axis (66), at least one cleaning roller (58, 60) which can be connected to the drive shaft (62) in a rotationally fixed and detachable manner, and a fixing device (88), wherein the cleaning roller (58, 60) has a roller body (68) with an axial roller recess (74) and a torque transmission member (72) which adjoins the roller recess (74) and through which the drive shaft (62) passes, forming a rotationally fixed connection, and wherein the fixing device (88) can be inserted into the roller recess (74) and can be axially fixed to the drive shaft (62), wherein a stop element (98) of the fixing device (88) comes to bear against a stop surface (100) of the roller body (68).In order to further develop the cleaning device (10) such that it is easier to handle when replacing a cleaning roller (58, 60), it is proposed that the fixing device (88) has a guide body (90) in which a rotary body (92) is held rotatably and axially immovably, wherein the rotary body (92) has at least one holding arm (132, 134) which cooperates with a guide member (102) of the guide body (90) and can be moved back and forth between a locking position and a release position by rotation of the rotary body (92), and which has a locking element (136, 138) which, in the locking position, dips into a recess (84) in the drive shaft (62) and, in the release position, is spaced from the recess (84).