Vacuum Cleaner Height Adjustment With Shock-Absorbing Front Axle
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Solution Overview
Problem
Existing vacuum cleaner height adjustment mechanisms require the main body to be in a vertical position for adjustment, which is inconvenient during use, and do not effectively absorb shocks when the cleaner is dropped, potentially causing damage.
Innovation Solution
A height adjustment mechanism that allows for manual adjustment of the cleaning head's height without requiring the vacuum cleaner to be in a vertical position, featuring a pivotable axle with a spiral-threaded shaft and guide member, an indexing block with detents, and a spring for shock absorption, enabling the front wheels to be raised or lowered relative to the cleaning head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the height adjustment mechanism requires the main body to be in vertical position for adjustment, then the adjustment can be performed with a simple mechanism, but the ease of operation deteriorates because adjustment is inconvenient during use
Solution Approach 1:
The adjustment mechanism allows the cleaning head to be adjusted to any height position dynamically during operation, rather than requiring a fixed vertical position. The front wheels are mounted to pivot around a fixed axis, enabling continuous height adjustment while the vacuum cleaner is in use, transforming a static adjustment system into a dynamic one.
Solution Approach 2:
The cleaning head assembly serves multiple functions: it provides cleaning action through the agitator brush, supports movement through wheels, and enables height adjustment during operation. The universal design allows the same mechanism to handle both cleaning operations and height adjustment simultaneously, eliminating the need for separate adjustment procedures.
2Adaptability or versatility
If the cleaning head is designed with fixed height, then the device complexity is reduced, but the adaptability deteriorates because it cannot adjust to varying carpet thicknesses and pile characteristics
Solution Approach 1:
The height of the cleaning head is made variable through the adjustable axle position. By changing the vertical position parameter of the front wheels relative to the cleaning head, the system adapts to different surface conditions including bare floors and carpets of varying thicknesses, optimizing cleaning performance for each surface type.
Solution Approach 2:
The user can pre-adjust the height of the cleaning head before encountering different surface conditions or carpet types. The adjustment mechanism allows setting the optimal height in advance, ensuring the agitator brush and suction inlet are properly positioned for the upcoming cleaning task.
3Reliability
If the cleaning head is rigidly mounted, then the structural strength is improved, but the shock absorption capability deteriorates, increasing potential for damage when set down hard
Solution Approach 1:
The pivotable axle assembly acts as a shock-absorbing mechanism that cushions impacts before they reach the main body. When the vacuum cleaner is set down hard on the cleaning head, the axle can pivot and absorb the shock, preventing damage to the handle and dust storage compartment, thereby providing beforehand cushioning against potential damage.
Solution Approach 2:
The pivotable axle assembly serves as an intermediary element between the rigid cleaning head and the main body of the vacuum cleaner. This intermediate component absorbs and dissipates shock forces, protecting the stronger but more vulnerable handle and dust storage compartment from damage during hard landings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables convenient height adjustment during use and reduces the risk of damage from shocks, allowing the vacuum cleaner to maintain optimal dirt and debris removal performance on various surfaces without needing to be repositioned.
Implementation Method 1
a spring urging the indexing washer into engagement with the indexing block
Implementation Method 2
the mechanism can act as a shock absorber when the vacuum cleaner is set down hard on the cleaning head thus reducing the potential for damage of the vacuum cleaner
Implementation Method 3
one end of the shaft having spiral threads thereon and an opposite end having an adjustment knob fixed thereto for manually rotating the shaft, and a guide member having internal threads matching and engaged with the spiral threads on the shaft for movement along the shaft
Data Source
AI summary
A vacuum cleaner height adjustment mechanism including a cleaning head having a pair of laterally spaced front wheels and a pair of laterally spaced rear wheels mounted for rotation within the cleaning head for supporting the cleaning head on a floor during vacuum cleaning operations, the front wheels being mounted to a common axle mounted in the cleaning head for pivotal movement around a fixed axis, the wheels being mounted to the axle offset from the pivotal axis of the axle, an arm extending from the axle, a shaft mounted substantially horizontally in the cleaning head for rotation about a central axis disposed in a plane perpendicular to a plane containing the axis of the axle, one end of the shaft having spiral threads thereon and an opposite end having an adjustment knob fixed thereto for manually rotating the shaft, and a guide member having internal threads matching and engaged with the spiral threads on the shaft for movement along the shaft, the guide member being coupled to the arm extending from the axle so as to pivot the axle when the shaft is rotated by rotating the knob, whereby the front wheels are raised or lowered relative to the cleaning head.