RU2279993C2 - Articulated oar - Google Patents

Abstract

FIELD: boatbuilding; construction of oars for rowing with face forward.

SUBSTANCE: proposed articulated oar has handle with semi-gear, rod with semi-gear and ears made on its other end with vertical coaxial axles, lever with vertical bracket secured to it from below, rod articulated with lever ears on one side and with axle on swivel plate on other side; swivel plate is secured on rowlock which is secured on brackets of shallow-draft vessel or on its side. Bracket is secured to lever from below; streamlined bracket is tubular in shape and is provided with rectangular horizontal section. Two coaxial holes are provided in lower front corner of wide sides of this section. These holes receive blade which is rotatable relative to horizontal axis; this blade has longitudinal ridge on its concave side which strengthens the blade by 1/3 of its width. Between ridge and longitudinal tips of blade there are two trough-shaped streamlined chutes of double curvature. Flat is provided along axis of symmetry lengthwise relative to blade where bracket-ear having two horizontal coaxial holes of larger and smaller diameters is secured. Hole of larger diameter is used for securing the blade and holes of lesser diameter are used for securing the spring-loaded rod provided with bead and shoulder from below. Compression spring is fitted on rod and is supported by lower face of lever. Upper end of rod is brought to lever top through hole made along axis of symmetry of lever; it is provided with bearing roller horizontally revolving on cantilever pin. Horizontal plate is secured on upper ear of rod at point where lever is articulated to rod. This horizontal plate is secured by means of dowel pins and screws. At other end plate is secured on opposite side to sector of L-shaped section at angle of 80-90° or to sectional sector for control of stroke angle; "hill" which is spring-loaded downward is secured to one end of sector ; on other side vertical wall of sector is tangentially bent away inside sector angle by 10-15°.

EFFECT: increased rate of rowing; enhanced efficiency at use of man power.

9 dwg

Description

The invention relates to boating sports equipment, mainly a pair of two, four, eight academic boats.

It is known articulated oar containing a rod with a half gear, a handle with the same half gear, planted meshing on the vertical axes, mounted on a thick sheet of l-shaped oarlock, mounted rotary on the parallel axis of the boat. The oarlock can be fixed on the bracket of the academic boat or to the side of the boat, yala. In addition, the paddle contains an articulated lever to which the paddle blade is rigidly attached to the bottom. At the other end of the lever, a tubular rod is pivotally attached, attached at the other end to the vertical axis on the oarlock.

The disadvantage is that when preparing the stroke (carrying it forward over the water), the blade remains perpendicular to the surface of the water, while remaining perpendicular to the axial plane of the boat, at which the speed of the paddle blade is more than doubled, as a result of which the air resistance increases, the speed decreases.

The aim of the invention is to increase the speed and coefficient of efficiency - the efficiency of the use of muscular power applied during rowing by reducing the resistance of the air in preparation for the stroke, as well as achieving better results in sports.

This goal is achieved by the fact that on an articulated oar, consisting of a tubular rod with a semi-cylindrical gear, at the opposite end of the rod, a lever with a bracket is attached pivotally to the vertical axis from the bottom of a rectangular tubular section, at the bottom of which coaxial holes are made on opposite walls. The paddle blade is made on one side of a convex surface with double curvature, and on the other hand with a longitudinal stiff longitudinal ridge, between it and longitudinal edges two trough-like streamlined grooves of double curvature are made. On the vertical axis of symmetry of the blade is attached at least four bolts (screws) a double-eye lever (bracket) with two parallel holes, one on the side of the blade of larger diameter, and the second smaller on the rounded end.

A perpendicular (vertical) hole is made on the axis of symmetry of the lever, within the rectangular-tubular bracket, into which a spring-loaded rod is inserted, attached from the bottom rotationally in the hole of a smaller diameter of the lever (bracket) attached to the paddle blade. A support roller with a diameter of 8-12 mm is attached to the upper end of the rod protruding above the lever, pivotally mounted on the oar rod, on a cantilever wire finger facing the rod, On the upper eye of the rod of the hinged lever of the oar, a strap is attached with fixation on the pins and a half-countersunk head, attached on the thrust side of the oar above the lever, with an l-shaped section to the annular sector, for example, at an angle of 90 degrees. At the ends of the L-shaped sectors, depending on the right or left oar, a spring-loaded “slide” of lifting and rolling the thrust-drive roller of the paddle blade from the working position to horizontal and vice versa is made. The roller, and with it the thrust, appear periodically at two levels: when posting the paddle blade, the roller running onto the “slide” and rolling over the top of the L-shaped sector holds the paddle blade in a horizontal position; and when the roller is at the end of the sector, under the action of the spring and the weight of the rod, the rod falls down to the level of the lever, while the blade takes on the working position.

What is new is that a rectangular tubular bracket with coaxial eyes on elongated walls is attached at the bottom of the lever. In the coaxial holes relative to the horizontal axis, the paddle blade with convex-concave surfaces is rotationally attached. On the concave side, on the thickened horizontal ridge, on the vertical axis of symmetry is attached a bracket with two coaxial and parallel holes, a larger diameter on the side of the blade, smaller at the end. Using a horizontal finger, the brackets on the lever and on the paddle blades are rotationally interconnected. A spring-loaded rod is attached to the holes of a smaller diameter, and at the upper end of the rod, on the cantilever pin, a support roller is installed facing the hinge of the lever with the oar rod. A strap is mounted on the upper eye of the oar rod with a landing on the pins and mounted on half-countersunk screws, and on the other hand, the strap is attached to the annular L-shaped sector. At one end of the sector, a spring-loaded “slide” is made, allowing the roller and traction to be at different levels relative to the lever.

A new set of features allows you to increase the speed of the boat and the efficiency of the use of the applied force by reducing the resistance of the air when wiring the paddle blade forward, by automatically bringing the paddle blade into horizontal and working position.

Figure 1 shows an academic boat with articulated oars and blades of progressive direction;

figure 2 is a fragment of a pivotally articulated paddle with the blade shown in horizontal when wiring and operating positions;

figure 3 is a view along aa;

figure 4 is a top view, in the perpendicular position of the oars to the axis of the boat;

figure 5 is a detailed view of the L-shaped sector with a section of the lever in place of the opening of the passage of the spring-loaded rod and a roller at the upper end;

figure 6 is a section along the axis of symmetry of the lever showing the l-shaped sector with a strap, roller and spring-loaded traction;

Fig.7 - when the sector moves, the roller lifts a spring-loaded "slide";

on Fig - roller with a spring-loaded rod rises along the "hill", bringing the paddle blade in a horizontal position;

Fig.9 - the roller and thrust under the action of the spring and weight fall on the level of the lever leading the blade to a vertical working position.

The articulated joint comprises a tubular handle 1 with a spherical plug at the end and a half gear at the other end, a rod 2 with the same half gear. On the opposite end of the tubular rod, triple eyelets made of whole metal with coaxial vertical holes are attached and a double-eyelet lever 4 trapezoidal on top, with eyelets on the opposite end, is pivotally attached using finger 3. Tubular rod 5 is attached to these eyes. The opposite end of the rod is attached to an axis attached to the L-shaped bar 6. On the other two axes mounted on the bar, half-gears are mounted on the handle and on the oar rod. The strap is attached rotatably relative to the horizontal axis parallel to the axis of the boat on the bracket of the academic boat or to the side of the boat, yale, or to the side of any boat. At the bottom of the lever 4, a bracket 7 of a rectangular pipe is attached. Coaxial openings are made on the half-open lower part from the side of the boat’s movement on the wide sides of the tubular section, in which the oar blade 8 is rotatably attached on the horizontal axis. The blade on one side is made convex double curvature symmetric, and on the other hand, with a longitudinal horizontal ridge 1/3 of the width. Between the ridge of the blade and the longitudinal edges (edges) are made trough-like concave of double curvature. A vertical platform protruding above the ridge is made on the vertical axis of symmetry of the blade. On this flat platform, with at least four screws (screws), an ear-shaped figured bracket 9 with two parallel holes of a larger and smaller diameter, larger for mounting the blade 8 on the bracket 7 attached to the lever 4, is firmly attached, and a spring-loaded rod is attached to the smaller hole 10, protruding with its upper end above the lever 4 through the hole framed by the ring 11, made vertically on the axis of symmetry of the lever. At the upper end of the rod, facing the eye of the rod on the cantilever pin, a support roller 12 is dressed. At the upper eye of the rod on the pins and screws with a semi-countersunk head there is a strap 13 which is attached at the opposite end to the L-shaped section of circular sector 14. At one end circular sector made downward inclined slope "hill" 15, at the other end, the vertical wall of the sector is bent at an angle of 10-15 degrees. And the angle adjustment of the paddle blade is carried out by a screw 16 with locknuts.

The articulated paddle blade operates as follows:

- figure 3 shown by a solid line corresponds to the working-stroke position, and the dotted line shows the inclined position of the blade when the blade is carried forward for the next stroke. When rowing, the roller 12 on the lever 4 is in a stationary position and just before the end of the rowing, the moving (turning) sector raises the "hill" spring-loaded down and passes it, the "hill" returns to its original position;

- Fig. 8 shows the moment when sector 14 moves at the beginning of the opposite direction, while the “slide” lifts the roller 12 upward, and with it the traction, overcoming the spring force, turns the paddle blade almost to a horizontal position, preventing the blade from accidentally burying in case of excitement, and while the roller, rolling along the crest of the sector at a height h, holds the blade in an inclined position, and at the end of the sector, the roller, having lost support, falls down to the same height h, bringing the blade into working position, observing the angle of cover 2- 4 degrees.

To adjust the angle of coverage, an adjustment screw 16 is provided.

Technical and economic advantages of the proposed technical solution are as follows:

- speed increases;

- in the process of rowing, the paddle blade automatically takes up a working vertical position, and when moving forward, it is in a horizontal position, as well as a finely adjusted cover when the blade enters the water;

- increases the efficiency of the use of muscle strength;

- reduced angular losses and on the emergence of the blade;

- it is possible to row while facing forward.

When developing the drawings and processing the application, the visible and invisible shortcomings of the Rowing Sports textbooks of 1966, 1976 from the Physical Culture and Sports Publishing House were taken into account.

Information sources

1. Copyright certificate No. 189624.

2. Application No. 2003131670 entitled "Paddle with gear connection of the handle and the shaft".

Claims (1)

An articulated oar containing a handle with a half-gear mesh, a rod with a half-gear gear, on the other end of which there are eyes with vertical coaxial axes, a lever with a vertical bracket attached at the bottom, a rod attached pivotally on one side to the eye of the lever, and on the other to the axis on the turntable attached to the horizontal and parallel axis of the boat by the oarlock, mounted on the brackets of the academic boat or to the side of the boat, yala, characterized in that, in order to increase speed, the mind reducing counter air resistance by automating the rotation of the paddle blade to an inclined position 6-10 ° above the water level in preparation for rowing (carrying the paddle blade with more than double speed of the boat forward) and the most correct automatic covering of the blade with water at the beginning of the stroke, bracket fixed at the bottom of the lever is made streamlined, tubular, of rectangular horizontal section, in the lower front corner of the wide sides of the section there are two coaxial holes in which it is rotated relative to the horizontal and an oar blade is attached, made on its concave side with a longitudinal ridge reinforcing the blade by 1/3 of the width, between it and the longitudinal edges of the blade there are two trough-like streamlined trenches of double curvature, on the axis of symmetry along the length of the blade there is a platform on which the bracket is attached an eye with two horizontal coaxial holes of a larger and smaller diameter, and with the help of a hole of a larger diameter, a blade is fixed, and by means of holes of a smaller diameter a spring-loaded rod with a collar, etc. with the ear at the bottom, and the compression spring, dressed on the rod, rests on top of the lower edge of the lever, and the rod with its upper end is brought up through the hole on the axis of symmetry of the lever and has a horizontally rotating support roller at the end, on the cantilever pin, on the upper eye of the rod , at the place of hinging the lever to the rod, a horizontal bar is attached on the pins and screws, which is attached to the circular l-shaped cross section with an angle of 80-90 ° or made two parts for adjusting the angle of the stroke, moreover, at one end of the sector a “slide” is rotated spring-loaded downward, and on the other hand, the vertical wall of the sector is bent from the tangent inward angle of the sector by 10-15 °.

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