Spring Cassette Protrusions for Compact Series Linking
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Solution Overview
Problem
Existing spring cassettes for cable or hose reels require significant space for connections between cassettes, which reduces the available space for the spring, compromising its volume and reliability, and existing solutions for linking cassettes are cumbersome and inefficient.
Innovation Solution
The design features two parallel discs with protrusions in the central part, allowing for simple connection of cassettes in series and parallel configurations using compact connecting members, minimizing space requirements and maximizing spring volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an adapter piece is used to link cassettes in series or parallel, then the cassettes can be connected, but the adapter piece is cumbersome and requires significant space in the winder
Solution Approach 1:
The protrusions on the discs serve multiple functions: they act as connection points for linking cassettes in series or parallel configurations, and they also serve as mounting points for the cassette in the winder. This multi-functionality eliminates the need for separate adapter pieces, reducing the space required in the winder while maintaining the ability to link cassettes flexibly.
Solution Approach 2:
The connection mechanism is nested within the existing cassette structure. The protrusions are integrated into the discs that already form the cassette housing, so the connection functionality is embedded within the cassette itself rather than requiring external adapter pieces. This nesting approach minimizes additional space requirements.
2Volume of stationary object
If space is reduced to accommodate connection pieces, then the winder size is minimized, but the spring volume is reduced compromising reliability
Solution Approach 1:
The protrusions perform dual functions as both connection points for linking cassettes and as structural elements of the cassette housing. This eliminates the need for separate connection pieces that would occupy space, thereby preserving spring volume while maintaining cassette linkability.
Solution Approach 2:
The connection functionality is achieved by utilizing the radial dimension of the disc structure through protrusions, rather than requiring additional axial or lateral space. This dimensional approach allows connection without compromising the volume available for the spring.
3Adaptability or versatility
If protrusions are added to the discs, then cassette connection is simplified and space is minimized, but the manufacturing complexity increases
Solution Approach 1:
The protrusions are created by modifying the disc geometry through stamping, which changes the physical parameters of the disc material. This stamping process is a standard manufacturing technique that adds minimal complexity while enabling the connection functionality.
Solution Approach 2:
The disc is segmented into functional zones: the central part with protrusions for connection purposes, and the peripheral part for housing the spring. This segmentation allows the protrusions to be integrated into the disc manufacturing process without requiring separate assembly steps.
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 efficient linking of multiple cassettes while minimizing space, maximizing the spring's stroke and force, and simplifying the assembly process, enhancing the reliability and efficiency of the reel system.
Implementation Method 1
A self-winding cable or hose reel comprises at least one spiral spring exerting a return force on the cable or the hose so as to wind up said cable or hose on the drum of the reel
Implementation Method 2
each of said discs has, in a central part, at least two protrusions extending towards the outside of the cassette
Data Source
Figure 1~2
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AI summary
The invention relates to a spring cassette(1) comprising: - two parallel discs (2, 3) rigidly connected to one another via their periphery, - a coiled spring (5) held between said discs (2, 3), the outer coil of said spring (5) being rigidly attached to the periphery of said discs, characterised in that each of said discs (2, 3) has, in a central portion, at least two protrusions (20) extending towards the outside of the cassette. The invention also relates to a spring winder for a cable or tube, comprising at least one such spring cassette (1). Figure