Elastic Rear Wheel Unit for Vacuum Cleaner Stability
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Solution Overview
Problem
Vacuum cleaners lack stability when stopped, are prone to excessive rotation or overturning, and have difficulty detecting changes in angle to determine stopped or traveling states, which affects their operational efficiency and safety.
Innovation Solution
A vacuum cleaner design featuring a rear wheel unit with an elastic support system, moving wheels, and a detecting mechanism that includes a wheel motor assembly and a PCB to maintain stability, prevent rotation, and detect angle changes, allowing for easy direction change and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a vacuum cleaner is stopped while travelling, then the cleaner body can be rotated for direction change, but the cleaner body may be excessively rotated or overturned due to lack of stability
Solution Approach 1:
The patent changes the support parameter from fixed rigid support to variable elastic support. The elastic portion (spring) allows the supporting part to rotate and adjust its position dynamically, providing stability during operation while permitting controlled direction changes when stopped. This resolves the contradiction by making the support system adaptable to different operational states.
Solution Approach 2:
The supporting part is designed to be rotatable relative to the cleaner body, transforming the static support system into a dynamic one. This allows the vacuum cleaner to maintain stability during travel while enabling direction changes when stopped, as the supporting part can rotate to accommodate the cleaner body's rotation without causing overturning.
2Stability of the object's composition
If a rigid support structure is used to stabilize the cleaner body, then stability is improved, but the ability to detect angle changes for determining stopped or traveling state becomes more difficult
Solution Approach 1:
The rotatable supporting part creates a dynamic interface between the cleaner body and the ground support. This rotation capability allows the system to maintain stability while providing a measurable parameter (the rotation angle of the supporting part) that directly reflects the cleaner body's orientation and operational state, thereby facilitating angle change detection.
Solution Approach 2:
The supporting part acts as an intermediary element between the cleaner body and the ground. Its rotation serves as a mechanical indicator of the cleaner body's angle changes, making it easier to detect and measure orientation changes without requiring complex sensors directly on the cleaner body.
3Stability of the object's composition
If the supporting part is fixed to prevent rotation, then stability is improved, but the vacuum cleaner cannot easily change direction when stopped
Solution Approach 1:
The supporting part is designed with rotational freedom, transforming a static fixed support into a dynamic rotatable support. This allows the vacuum cleaner to change direction easily when stopped by rotating the cleaner body, while the elastic portion maintains stability by providing continuous ground contact and support force.
Solution Approach 2:
The system changes the support parameter from fixed position to variable position through rotation. The supporting part can rotate to different angles to accommodate direction changes, while the elastic portion ensures that stability is maintained throughout the rotation range by adjusting to the new orientation.
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
The design ensures the vacuum cleaner remains stably supported when stopped, prevents excessive rotation, and accurately detects its state, enhancing operational stability and safety.
Implementation Method 1
an elastic portion configured to extend from one side of the supporting part and to be elastically deformed by being in contact with the bottom surface of the cleaner body when the supporting part is rotated
Data Source
AI summary
Provided is a vacuum cleaner including a cleaner body of which a center of gravity is disposed at a rear side further than a rotating center thereof; one pair of moving wheels provided at both side surfaces of the cleaner body and configured to rotatably support the cleaner body and also to be rotated for travelling; and a rear wheel unit provided at a bottom surface of the cleaner body and configured to elastically support the cleaner body at a rear of the pair of moving wheels, wherein the rear wheel unit includes a supporting part rotatably installed at the bottom surface of the cleaner body and rotated in a rotating direction of the cleaner body; an elastic portion configured to extend from one side of the supporting part and to be elastically deformed by being in contact with the bottom surface of the cleaner body when the supporting part is rotated; a rotating member shaft-coupled to the supporting part and installed to be rotatable in a direction intersecting with a rotating direction of the supporting part; and a rear wheel installed at the rotating member and rolled while being in contact with the ground.