Automatically moveable floor dust collecting device and impeller wheel, in particular for a floor dust collecting device
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Solution Overview
Problem
Existing automatically movable soil dust collection devices face challenges in effectively navigating obstacles and maintaining driving stability due to limitations in tire design and material properties.
Innovation Solution
The design features an elastic tire with tread blocks that slope inward, forming a larger contact area when interacting with obstacles, allowing for favorable clawing and enhanced stability by increasing the ground contact area and utilizing the tire's elasticity to flatten under load, thereby improving navigation over uneven terrain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional tire design is used, then the structure is simple, but the ability to overcome obstacles and maintain driving stability is insufficient
Solution Approach 1:
The tire contact area is segmented into multiple tread blocks arranged in the circumferential direction. Each tread block is independently structured with a specific profile that slopes toward the center, allowing the tire to interact with obstacles in a step-by-step manner, thereby improving obstacle negotiation capability while maintaining manageable structural complexity
Solution Approach 2:
Different regions of the tire are given different properties: the tread blocks in the contact area have a specific sloping profile toward the center for optimal obstacle interaction, while other parts of the tire maintain conventional structure. This localized modification improves performance without requiring complete redesign of the entire tire
2Area of stationary object
If the tire material is made elastic, then the contact area with ground increases when loaded, but the tire deformation control becomes more complex
Solution Approach 1:
The tire material's elastic properties are utilized to change the contact area dynamically. When the tire is loaded, the elastic material deforms to increase the contact area with the ground, providing better stability and obstacle negotiation capability without requiring active control mechanisms
3Ease of operation
If tread blocks are positioned to optimize obstacle interaction, then clawing ability improves, but the manufacturing precision requirements increase
Solution Approach 1:
The tread blocks are designed with an asymmetric profile that slopes toward the center of the tire. This asymmetric geometry is specifically optimized to engage with obstacles like steps and edges, providing favorable clawing action. The symmetric arrangement of identical tread blocks around the tire circumference simplifies manufacturing while maintaining the asymmetric beneficial profile
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
This design enables better obstacle negotiation and improved driving stability by ensuring a larger contact area with the ground, even when encountering edges or steps, through the use of elastic material and strategically positioned tread blocks.
Implementation Method 1
the tire (4), which is made of elastic material, has one part each the tire contact area (5) has tread blocks (9)
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The automatically movable floor dust-collection appliance (1) has an impeller (2) with a rotational axis (7), a hub (3) and a tire (4) forming a tire contact surface (5), where a part of the tire contact surface in the cross-section has a profile falling towards the center. The part of the tire contact surface is formed by a profile block. The profile block forms a part of an assigned side surface and forms an area of the tire contact surface. The area of the tire contact surface protrudes in the direction rotational axis.