RU2104075C1 - Ski - Google Patents

Abstract

FIELD: sports equipment. SUBSTANCE: ski has carrier platform and sliding surface with guides having horizontal sliding plane. guides come from center of gravity to front and rear part of sliding surface at distance equal to 0.2-0.25 of ski length. Maximum height above sliding surface is 4-6 mm. Guides may be made rectangular, trapezium-shaped or sine-shaped. Guides may be offset from side faces toward axis of symmetry so as to define angle of 10-30 deg between horizontal part of guide and tangent between outer edge of side face and guide side. Carrier platform may be beveled toward side face. EFFECT: increased efficiency and simplified construction. 7 cl, 7 dwg

Description

 The invention relates to the construction of skis and improves the efficiency of movement of a skier along the track.

 Known skis containing a sliding surface with a guide and a cargo area [1]. This is a classic ski design, which is mainly used for walking in a classical way, mainly along a previously laid track. When moving on a flat surface of high density like "crust" they become uncontrollable, the stability of the skier is lost.

 The closest technical solution is a ski [2], which contains a cargo area, a sliding surface with a guide groove and pointed guides made along the edges. The presence of pointed guides allows the use of this design of skis for skating, but at the same time makes it difficult to maneuver when descending along an inclined surface or requires significant energy expenditures. This design of skis is intended for movement by skating, whereas in practice there is a need to use both classic and skating, depending on the terrain.

 Thus, in order to eliminate these shortcomings and increase the skier’s movement efficiency, a new ski design has been proposed for tracks of various profiles and snow cover densities. Why the guides have a horizontal sliding plane and are made, at least in a two-thread design, and the guides descend from the center of gravity to the front and rear of the sliding surface at a distance of 0.2 to 0.25 of the ski length, have a maximum height above the sliding surface 4 - 6 mm. Guides can be made rectangular, trapezoidal and sisusoidal in shape. Moreover, the guides can be shifted from the side faces towards the axis of symmetry so that the angle formed by the horizontal part of the guide and the tangent between the outer edges of the side face and the side of the guide form an angle of 10 to 30 degrees, and the cargo area is slanted towards the side faces.

 In FIG. 1 shows a general view of the proposed ski; in FIG. 2 - section A - A in FIG. 1 with a double-thread design of guides of rectangular cross section; in FIG. 3 - section A - A in FIG. 1 for multi-thread execution of guides; in FIG. 4 - section A - A in FIG. 1 with trapezoidal execution of guides; in FIG. 5 - section A - A with a sinusoidal design of the guides; in FIG. 6 - section A - A in FIG. 1 when performing a cargo area with a bevel.

 The ski contains a cargo area 1, a sliding surface 2 and guides 3, which can be made rectangular, trapezoidal, sinusoidal, offset to the axis of symmetry, as well as multi-thread.

 When using the ridge course, the presence of guide strips makes it possible to use the sliding surface of the ski as a supporting surface not immediately over its entire width, but in the corresponding sequence. The protruding strips come into contact first, and then the rest of the width of the sliding surface. Such a regular sequence of engaging a sliding surface provides an adjustable specific pressure on snowy soil, the possibility of pressing into the soil of almost any density. This provides universal skiing opportunities - the possibility of skating in both soft and hard ground.

,
- создание удельной нагрузки на поверхность скольжения в зоне ступенчатых направляющих от 0,5 до 1,5 кГ/см², необходимой для продавливания снежной поверхности и устранения бокового проскальзывания:

,
где P - вес лыжника, кг,
S - площадь поверхности ступенчатых направляющих, см²,
S = 2bl,
-обеспечение свободного маневрирования при спусках на склонах
l = 0,2 - 0,25•L - выбрана опытным путем.The dimensions of the guide strips must meet the conditions for the possibility of introducing the strip into the ground to ensure the need to counteract the transverse slippage when driving in the ridge course. These sizes can take into account the purpose of the ski for a specific range of soils. In practice, based on the mass skier and a variety of road conditions, the most satisfying sizes are:
- the height of the guides h = 4 - 6 mm
- the length of the guides l = 0.2 - 0.25L
- width of guides b = 0,1 - 0,2B
In this case, it was taken into account:
- the need to reduce the angle of inclination of the foot by the angle α without loss of adhesion to the sliding surface, when two faces (inner and outer) of the stepped rails counteract lateral slippage:

,
- the creation of a specific load on the sliding surface in the zone of stepped rails from 0.5 to 1.5 kg / cm ² , necessary for forcing the snow surface and eliminating lateral slippage:

,
where P is the weight of the skier, kg
S is the surface area of the stepped rails, cm ² ,
S = 2bl
- ensuring free maneuvering during descents on slopes
l = 0.2 - 0.25 • L - selected experimentally.

 The location of the lanes only in the central, most curved part of the ski and their reduction in height to the front and rear parts does not impede the skiing of this design and the classic course.

 The use of guides of various sections, such as rectangular, trapezoidal, sinusoidal, allows achieving the greatest success depending on the purpose of the ski design, so skis with two-thread guides are more suitable for classic and skating, and skis with multi-thread guides for slalom and as hunting skis . A kind of ski with offset guides towards the center of symmetry gives better results for high-speed skating.

 Thus, the use of skis of this design expands the versatility and effectiveness of using skis when driving on a ski track with different soil densities and different mobility techniques.

Claims (7)

 1. A ski containing a cargo area, a sliding surface and guides on a sliding surface, characterized in that the guides have a horizontal sliding plane and descend from the center of gravity of the ski to the front and rear parts of the sliding surface at a distance of 0.2 - 0.25 lengths.  2. Ski under item 1, characterized in that the maximum height of the guides above the sliding surface is 4 6 mm.  3. Ski under item 1, characterized in that the guides are made in a rectangular shape.  4. Ski under item 1, characterized in that the guides are made of trapezoidal shape.  5. Ski under item 1, characterized in that the guides are made in a sinusoidal shape. 6. Ski under item 1, characterized in that the guides are shifted from the side faces towards the axis of symmetry so that the angle formed by the horizontal part of the guide and the tangent between the outer edge of the side face and the side of the guide is 10 30 ^o .  7. Ski under item 1, characterized in that the cargo area is made with a bevel towards the side face.

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