Cardan-Joint Floor Tool for 270° Lateral Rotation
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Solution Overview
Problem
Existing hand-held floor preparation devices lack mobility and versatility, particularly in lateral directions, and often require external energy sources, limiting their use in complex spaces like corners and stairwells, and they are not designed for both wet cleaning and grinding.
Innovation Solution
A hand-held device with a base part and guide part connected via a cardan joint allowing 270° rotation, an integrated energy store for self-sufficiency, and a liquid supply system, enabling both forward and lateral movement with tools for scrubbing, polishing, and grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a joint is located laterally on the base with protruding parts, then the device can move back and forth in the processing direction, but lateral movement is limited
Solution Approach 1:
The patent applies a cardan joint (universal joint) mechanism that allows dynamic movement in multiple directions. The joint enables the guide section to rotate 270° laterally and tilt in the direction of cultivation simultaneously, transforming the static lateral limitation into a dynamic multi-directional movement capability. This resolves the contradiction by making the device adaptable to various movement requirements while maintaining ease of operation.
Solution Approach 2:
The invention adds an additional rotational degree of freedom by positioning the cardan joint's second axis transversely to the first joint axis. This dimensional addition allows the base section to rotate parallel to the cultivation surface about a vertical axis while the guide section can still tilt in the cultivation direction, effectively adding lateral rotational capability without compromising forward movement ease.
2Adaptability or versatility
If liquid containers are attached to the device itself, then wet cleaning function is provided, but the weight is increased
Solution Approach 1:
The patent integrates the liquid supply system directly into the base section structure, merging the fluid storage and delivery functions with the existing mechanical framework. The liquid supply connects to the tool through integrated channels within the base section, eliminating the need for separate external containers and reducing overall device weight while maintaining wet cleaning capability.
Solution Approach 2:
The invention extracts the liquid storage function from separate external containers and integrates it into the base section's internal structure. By taking out the need for external mounting and incorporating fluid channels directly into the base, the design reduces weight while preserving the wet cleaning function.
3Ease of operation
If wheels are provided for easy movement in linear direction, then mobility in forward direction is improved, but real mobility in lateral direction is not allowed
Solution Approach 1:
The patent combines traditional wheels for forward movement with a cardan joint mechanism that enables dynamic lateral rotation. The wheels maintain ease of linear movement while the cardan joint adds the capability to rotate the base section parallel to the cultivation surface, providing true lateral mobility without compromising forward movement ease.
Solution Approach 2:
The invention adds a rotational degree of freedom about a vertical axis through the cardan joint, supplementing the wheel-based linear movement. This dimensional addition allows the device to move not only forward but also to orient itself laterally, achieving comprehensive mobility in multiple directions while maintaining the simplicity of wheel-based forward propulsion.
4Duration of action of stationary object
If external power source is required, then continuous operation is possible, but mobility and versatility in complex spaces is limited
Solution Approach 1:
The patent implements self-service by integrating an energy storage device (battery) directly into the base section, making the device self-powered and independent of external power sources. This allows continuous operation through onboard energy storage while providing the mobility and versatility needed to operate in complex spaces like corners and stairwells without being constrained by power cable limitations.
Solution Approach 2:
The invention segments the power supply system by placing a rechargeable battery and motor directly in the base section, separating the power source from external dependencies. This segmentation enables the device to function autonomously in remote or complex locations while maintaining continuous operation capability through onboard energy storage.
Data Source
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AI summary
The invention relates to a hand-held soil cultivation device, having a base part (1) with at least one tool (31) for soil cultivation and a motor (26) for driving the at least one tool (31) and having a guide part (2) with a handle part (3 ), wherein the guide part (2) is connected to the base part (1) via a first joint (4) adjustable in the processing direction (6) with a joint axis (G1) transverse to the processing direction (6), the base part (1) having a liquid supply (11) and a liquid receptacle (13). According to the invention, the guide part (2) has a further joint (8) at the lower end below the center but above the base part (1) with a further joint axis (G2) running transversely to the first joint axis (G1), around which the The guide part (2) can be adjusted transversely to the processing direction (6) in such a way that the base part (1) is rotated by a user (P) parallel to the processing surface (B) by at least ± 270° about a vertical axis (A1) of the base part (1). can be, and that the soil cultivation device has at least one energy store (24, 33) for supplying the at least one tool (31) for soil cultivation.