Cleaner Head Brush Drum Support to Prevent Rotation Axis Misalignment
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Solution Overview
Problem
The existing cleaner head designs face issues with the rotation axis of the brush drum becoming misaligned due to the weight of the driving motor, leading to noise and reduced performance, as the driving housing is typically supported in a cantilever form and prone to bending or misalignment.
Innovation Solution
The cleaner head incorporates a brush case with a first support portion and a second support portion arranged along the rotation axis, featuring a bearing mounting portion and a driving mounting portion to securely position the driving housing, minimizing misalignment by distributing the weight and external forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driving housing is supported in a cantilever form by one end portion of the cleaner head, then the device complexity is reduced, but the driving housing bends or misaligns due to the weight of the driving motor, causing rotation axis misalignment and noise
Solution Approach 1:
The support structure is segmented into multiple independent support portions (first support portion and second support portion) that are distributed along the rotation axis of the brush drum. Each support portion independently supports the driving housing at different locations, preventing the cantilever bending issue while maintaining structural simplicity
Solution Approach 2:
The support structure transitions from a single-point cantilever support to a distributed multi-point support arrangement along the rotation axis dimension. This dimensional distribution of support points prevents misalignment by spreading the load and providing rotational stability
2Volume of moving object
If the driving motor is arranged inside the brush drum, then the cleaner head volume is reduced, but the driving housing becomes prone to bending and misalignment due to the concentrated weight
Solution Approach 1:
The support function is segmented into multiple support portions distributed along the rotation axis, each bearing a portion of the driving motor's weight. This segmentation prevents the concentrated load from causing housing bending while maintaining the compact internal arrangement
Solution Approach 2:
The distributed support portions act as counterbalancing elements that offset the gravitational force on the driving motor. By providing multiple support points along the rotation axis, the structure counteracts the bending moment that would otherwise cause misalignment
Data Source
AI summary
A cleaner head having a first support portion and a second support portion of a brush case rotatably supporting a brush drum, includes a base portion forming an end of the brush case, a bearing mounting portion protruding toward the brush chamber from the base portion to support a bearing coupled to one end portion of the brush drum and providing an insertion space into which an end portion of a driving housing is insertable, and a driving mounting portion arranged to be separated from the bearing mounting portion and supporting an end portion of the driving housing inserted into the insertion space.