Roller Ski With Segmented Longitudinal And Transverse Rollers
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Solution Overview
Problem
Existing personal training devices, such as roller skis and skateboards, lack the control and driving experience similar to snow skiing, particularly in terms of steering and braking.
Innovation Solution
A personal training device with a rolling arrangement that includes longitudinal and crossroll equipment enabling overlapping rolling movements along both axes, along with a braking device that creates a cross brake, increasing rolling resistance and allowing for ski-like steering and braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If only longitudinal rolling devices are used, then the device can roll forward and backward, but it lacks lateral control and steering capability similar to snow skiing
Solution Approach 1:
The rolling device is segmented into two independent rolling mechanisms: longitudinal rollers for forward/backward motion and transverse rollers for lateral motion. This segmentation allows each roller set to specialize in one direction, enabling independent control of longitudinal and lateral movements, which is essential for ski-like steering and drifting operations
Solution Approach 2:
The invention adds a transverse rolling dimension perpendicular to the conventional longitudinal rolling direction. By incorporating transverse rollers that can rotate independently, the device gains lateral mobility capability, transforming from one-dimensional (longitudinal only) to two-dimensional movement, enabling ski-like carving and side-drifting maneuvers
2Adaptability or versatility
If transverse rolling devices are added for lateral movement, then steering capability improves, but the device loses stability and becomes difficult to control
Solution Approach 1:
The transverse rollers are designed with dynamic mounting that allows them to tilt and rotate independently relative to the longitudinal axis. This dynamic configuration enables the transverse rollers to engage or disengage from the ground selectively, providing controlled lateral movement when needed while maintaining stable longitudinal rolling when lateral control is not required
Solution Approach 2:
The invention changes the operational parameters of the transverse rollers by allowing their rotational speed and engagement level to be independently controlled. By adjusting the rotational speed ratio between longitudinal and transverse rollers, and by controlling the degree of transverse roller engagement with the ground, the device achieves variable steering capability while maintaining control stability
3Ease of operation
If braking device is added to generate transverse braking force, then lateral control and drifting capability improve, but the device complexity increases
Solution Approach 1:
The braking function is merged with the transverse rolling device itself. The transverse rollers serve dual purposes: they enable lateral movement through rotation, and they provide lateral braking through controlled friction with the ground. By adjusting the rotational speed of transverse rollers to be slower than longitudinal rollers, or by selectively engaging them, the system achieves braking without requiring separate brake components
Solution Approach 2:
The transverse rolling device is designed with multi-functionality, serving both as a lateral movement mechanism and as a braking system. The same transverse rollers that enable side-drifting and steering also provide lateral resistance and braking force when their rotation is controlled or restricted, eliminating the need for dedicated brake components
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 device provides a more pleasant and controllable driving experience, mimicking the movements and sensations of snow skiing, including side drifts and carves, by allowing for adjustable cross brake force and platform inclination.
Implementation Method 1
The braking device has a mechanical and/or hydraulic and/or electromagnetic spring device which resiliently supports the rolling arrangement, in particular a pair of rolling arrangements, relative to a platform
Implementation Method 2
a braking device by means of which a transverse braking force can be generated, which increases the rolling resistance of the transverse rolling device and thereby has a braking effect on rolling movements along the transverse axis
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A personal propulsion device (2), in particular a roller ski (2), a skateboard, or similar device, for rolling propulsion on a surface, especially propelled by a force acting downhill on a sloping surface, is described. A longitudinal and transverse rolling device of a rolling assembly (5) of the propulsion device (2) enables superimposed rolling movements along a longitudinal center axis (7) and a transverse axis (9, 10). Furthermore, the rolling assembly (5) has at least one braking device (14) by means of which a transverse braking force can be generated, which increases the rolling resistance of the transverse rolling device and thereby acts as a brake on rolling movements along the transverse axis (9, 10), wherein the transverse braking force can be changed by the person using the device via the standing surface (4). A rolling assembly (5) for such a personal propulsion device (2) is also described.