Cleaning Tool Alignment Receptacle for Low-Force Hub Locking
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Solution Overview
Problem
The process of attaching and detaching cleaning tools on surface maintenance machines is labor-intensive and often difficult due to poor visibility, ergonomics, and the need to overcome spring-loaded clips, leading to potential misalignment and increased effort.
Innovation Solution
A cleaning tool assembly with a tool adapter and aligning receptacle that allows for quick alignment and secure attachment using a spring-loaded clip, which reduces the force required for installation and provides a coaxial rotational alignment between the hub and tool adapter, facilitating easy loading and unloading of cleaning tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-loaded clip locking mechanism is used to secure the cleaning tool to the hub, then the cleaning tool is reliably retained in place, but the operator must apply large force to overcome the spring force, making alignment and locking difficult
Solution Approach 1:
The locking mechanism is segmented into two independent functions: the spring-loaded clip provides reliable retention once locked, while the aligning receptacle with chamfered surface provides easy alignment and initial engagement. This segmentation allows each component to optimize its specific function without compromising the other.
Solution Approach 2:
The aligning receptacle performs preliminary alignment action before the locking mechanism engages. The chamfered surface guides the hub into proper rotational orientation and axial position beforehand, so that when the spring-loaded clip engages, the components are already correctly positioned, reducing the force needed for final locking.
2Manufacturing precision
If manual positioning and rotation of the cleaning tool is required to achieve coaxial alignment with the hub, then precise alignment can be achieved, but the process becomes labor-intensive and may fail due to poor visibility, poor reach and poor ergonomics
Solution Approach 1:
The aligning receptacle with its chamfered surface enables self-alignment of the hub and tool adapter. When the cleaning tool is pushed onto the hub, the chamfered surface automatically guides the components into correct coaxial alignment without requiring manual positioning or rotation, making the system self-servicing regarding alignment.
Solution Approach 2:
The manual mechanical positioning and rotation process is replaced by a passive mechanical guidance system. The chamfered surface of the aligning receptacle provides geometric constraints that automatically establish correct alignment through the natural insertion motion, substituting active manual alignment with passive geometric self-alignment.
3Adaptability or versatility
If the operator works in low clearance spaces under the surface maintenance machine, then the cleaning head can be accessed, but visibility and ergonomics are poor, making alignment difficult
Solution Approach 1:
The self-aligning mechanism eliminates the need for visual verification and manual adjustment during alignment, which would be particularly difficult in low clearance spaces. The chamfered surface provides tactile feedback and automatic guidance that works equally well regardless of lighting conditions or operator visibility, making the system adaptable to constrained working environments.
Data Source
AI summary
A cleaning head assembly for a surface maintenance machine comprising a cleaning tool having a tool adapter, a driver adapted to provide a generally rotational motion to the cleaning tool to clean the floor surface, the driver being releasably connected to the tool adapter of the cleaning tool by a hub, and an aligning receptacle coupled to the tool adapter of the cleaning tool and positioned between the hub and the tool adapter, the aligning receptacle having an receptacle opening for receiving the hub, wherein the aligning receptacle is adapted to guide and matingly seat the hub into the receptacle opening and thereby engage the cleaning tool to the driver such that the cleaning tool and the driver are rotationally aligned and a rotational motion of the driver is transferred to the cleaning tool by the hub.