Roller Ski Shock Absorber Layout for Snow-Like Impact Damping
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Solution Overview
Problem
Existing roller skis fail to effectively emulate the feel of snow skiing due to inadequate shock absorber systems, particularly in handling complex movements like diagonal stride and skating techniques, and abrupt impacts during kick-offs, leading to uncomfortable experiences.
Innovation Solution
A shock absorber device is integrated within the hollow end of a roller ski body, utilizing stretchable and compressible material between metal plates to absorb mechanical impacts from various directions, mimicking snow skiing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional shock absorber device is used with a long wheel carrier extending outside the backend, then the wheel can spin without interfering with the roller ski body, but the forces acting on the wheel create a large momentum on the centre of rotation which worsens the shock absorption performance
Solution Approach 1:
The patent moves the centre of rotation from a position outside the roller ski body to a position inside the roller ski body. This dimensional repositioning changes the moment arm length, reducing the momentum created by forces acting on the wheel while still allowing the wheel carrier to extend outside the backend for unrestricted wheel rotation.
Solution Approach 2:
Instead of extending the wheel carrier outside the backend with the centre of rotation outside, the patent inverts the arrangement by positioning the centre of rotation inside the roller ski body while allowing the wheel carrier to still extend outward for proper wheel function.
2Ease of operation
If the wheel carrier is extended outside the backend with a distance larger than the wheel radius, then the wheel can spin without interference, but the wheel carrier becomes relatively long which increases the moment arm and worsens shock absorption
Solution Approach 1:
The patent repositions the centre of rotation inside the roller ski body rather than outside, which changes the geometric arrangement. This allows the wheel carrier to extend outside the backend for wheel rotation freedom while keeping the effective moment arm shorter, thus reducing the carrier length requirements.
3Reliability
If the shock absorber carrier is fixed to the roller ski body end while the wheel carrier is forced up or down by the wheel, then the rubber strip stretches and compresses to absorb shock, but the stretching of the rubber strip becomes the main action which may limit the types of movements that can be absorbed
Solution Approach 1:
The patent makes the wheel carrier movable relative to the roller ski body by allowing it to rotate about a centre of rotation positioned inside the body. This dynamic arrangement enables the wheel carrier to move up and down independently while the rubber strip provides elastic coupling, allowing the system to adapt to various movement types including diagonal stride and skating techniques.
Solution Approach 2:
The patent separates the wheel carrier from the shock absorber carrier, allowing the wheel carrier to rotate independently about a centre of rotation. This segmentation enables independent movement of the wheel carrier while the rubber strip connects the two carriers, providing shock absorption across multiple movement types.
4Stability of the object's composition
If a shock absorber device is integrated within the hollow end of the roller ski body, then the structure becomes more compact and stable, but the wheel attachment becomes more complex
Solution Approach 1:
The patent positions the centre of rotation inside the hollow end of the roller ski body, effectively nesting the rotational mechanism within the existing ski structure. The wheel carrier extends outside the backend while the pivot point remains inside, creating a compact integrated design that maintains stability.
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 shock absorber device provides improved stability and comfort by softening impacts and emulating snow-like conditions, enhancing the training experience for both diagonal stride and skating techniques.
Implementation Method 1
the roller ski body and the wheel carrier bound together by a rubber strip (2) during vulcanization of the rubber strip (2)... stretching of the rubber strip (2) is the main action of the shock absorber
Implementation Method 2
rubber stripe (2) in the process of rubber vulcanization... stretching of the rubber strip (2) is the main action of the shock absorber
Data Source
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AI summary
The present invention is related to a roller ski with an adapted shock absorber device arrangeable inside a hollow backend of the roller ski body (16), wherein a first member (11) of the shock absorber device is supporting a backend wheel of the roller ski, a second member (14) is attachable to an inside surface of the hollow backend of the roller ski body (16), wherein a material strip (13) of a stretchable and compressible material is arranged in between the first and second member (11, 14).