RU2264326C2 - Articulated oar - Google Patents

Abstract

FIELD: oars.

SUBSTANCE: proposed articulated oar has shank, lever with rigidly secured blade, rod and rowlock forming tetragonal articulated system. End of oar handle has ear; second rod with ear is articulated on axle of said rod. Second rod and handle are articulated to L-shaped handle-holder forming (together with rowlock) articulated parallelogram system.

EFFECT: increase of speed; enhanced efficiency; improved conditions for oarsman.

6 dwg

Description

The oars of academic courts, boats, fishing boats, the oars of ancient slave ships, the oars of boats of prehistoric people are known. All oars, regardless of the time, did not have a fundamental difference and do not have it now.

The modern oar consisted of and consists of a handle, a heel, a cuff of a rod / shaft /, a neck and lobes.

The disadvantages of these oars are the same, are as follows:

- angular losses of 12 ÷ 15% and more, and only with the angle of rotation of the oar of the academic boat, the most perfect of all other boats at 40 degrees, the losses are 11.2%, and with an increase in the angle of loss they will increase even more;

- during the stroke, due to the continuous change in the angle of rotation, the arms are inefficiently loaded, or rather, the arm muscles are inconsistent and the return of muscular strength is inferior;

- the inability to combat the sliding of the paddle;

- the end of the paddle blade goes deep into the water, it takes energy and time, especially boats with high sides.

The articulated oar is close to the trapezoidal pattern described in the application under the name ″ Oar with gear connection of the handle and the shaft ″, which at the beginning and at the end of the stroke has the greatest angles of attack of the blade, and when the oar is perpendicular to the axis of the boat, the blade is also perpendicular and gives off energy 100% completely, with the exception of loss of mechanical work inside the mechanical system.

The disadvantage is that as a result of a continuous change in the angle of the handle, the muscle strength of the hands is not fully used due to the lack of full coordination.

The aim of the invention is to increase speed, efficiency, improve comfort and moral satisfaction.

This goal is achieved by the fact that on the tubular brackets or to the side of the boat / dinghy, boat, etc., / a C-shaped bracket is attached from thick strip steel to the bracket, on the vertical part of which, through the axis of symmetry, through coaxial holes with screw thread are made. Between the C-shaped bracket, a U-shaped bracket is inserted on the vertical part in the coaxial holes of the sleeve with through coaxial holes. Axes with a screw thread and a bolt head are inserted into these holes and locked with a round washer. On these axes, the U-shaped bracket has a limited rotation. On the horizontal part of the U-shaped bracket near the corners, two holes are made along the axis of symmetry. In the first left (see Fig. 3), a sleeve is inserted vertically, into the hole of which an axis with a hexagonal or cylindrical head, pointed at the bottom by a splintered ring, is inserted. A cylindrical undercut is made on top of the axis head, on which a pipe is installed, covering the shaft / shaft / oars. In the other hole of the horizontal part of the U-shaped bracket, an axis is attached for rods that regulate the forward movement of the paddle blade on one side and the L-shaped handle on the other hand, in which the handle, without changing its position, moves along the arc of a circle described by the end of the handle. In this case, the moment of force should not exceed the moment of weight of the rower, i.e. M ₂ > M ₁ , where M ₂ is the moment of force, M ₁ is the moment of weight.

What is new is that a C-shaped bracket is attached to the bracket with screw-threaded holes, into which the axes are inserted on the screw threaded coaxially on both sides and are locked with washers. A U-shaped bracket with bushings is installed on the axis with limited rotation, and two holes are made on the horizontal part of the bracket, a vertical sleeve with a head is inserted into one of the brackets, an axis with a cylindrical horizontal recess is inserted into the hole on which the pipe for the oar rod is attached. In the second hole, an axis is attached on which the control rods for the paddle blade and the L-shaped holder-holder on the paddle handle are pivotally attached. The handle with the help of eyes and fingers is pivotally connected both to the handle of the oar and to the rod, this ensures the forward movement of the handle and paddle blade.

Figure 1 shows a boat with oar oars with articulated articulated directional / translational / blade and handle on the handle;

figure 2 - directional paddle with a blade and articulated handle;

figure 3 - rotated section along aa;

figure 4 - node 1 of the articulation of the handle with the handle and rod;

figure 5 is a view of B;

figure 6 is a view of B.

Any boat / academic, dinghy, yal, fishing, etc. / 1 can have an articulated oar 2 containing a rod 3, a handle 4, a blade 5, a lever 6, a link 7, a second link 8, an L-shaped handle holder 9, oarlock 10.

The articulated outer side, including the blade 5, represents a theoretically versatile quadrangle very close to the trapezoidal system, as a result of which we have an adjustable angle of attack of the blade at the beginning of the stroke, gradually decreasing to zero at 90 degrees to the boat axis, and in the second half of the stroke as the oar turns the angle of attack grows to the maximum value.

The articulated system on the side of the handle is a parallelogram system, therefore, the handle pivotally attached to the handle and the rod moves along the arc all the time rowing parallel to itself, providing great convenience to the hand for the complete release of the forces of the stroke.

To prevent these two systems from breaking, it is necessary to prevent the shift of the rod 3, the oars 2 in the cuff pipe 11 at the oarlock 10. If the rod of the oar is wooden, then, having calculated, the through hole should be made along the neutral axis and the bend of the rod. With a metal tubular oar, the axis of rotation of the oar rod should be attached to the tubular rod 3, then quadrangular-trapezoidal or parallelogram systems that give a positive effect will not be violated. The axis 12 is inserted into the sleeve 13 and is locked by the ring 14 with a cotter pin or screw. And the rotation of the oarlock 10 relative to the horizontal axis is carried out on the coaxial axes 15 inserted on the thread of the C-shaped bracket 16, locked with a round washer 17. The rods 7, 8 are attached to the axis 18 attached to the horizontal part of the U-shaped bracket 19. A C -shaped bracket 16 is attached to the bracket plate 20.

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

- the speed of the boat increases;

- more fully used force;

- previously inevitable losses are reduced;

- Improves the aesthetics of rowing and the morale of the rower;

- Sports achievements will be higher.

In the development of the drawings and the application, the visible and invisible flaws of the textbooks “Rowing” 1966, 1976 of the publishing house “Physical Education and Sport” were taken into account.

Copyright certificate No. 189324.

Application entitled ″ Paddle with gear connection of the handle and the shaft ″ No. 2003131670 priority 28 oct. 2003.

Claims (1)

An articulated oar containing a rod, a lever with a rigidly fixed blade, a thrust and an oarlock, forming a quadrangular articulated system that allows the blade to continuously change the angle of attack of the blade from maximum to zero in the first half of the stroke and from zero to maximum in the second half, which differs the fact that to increase speed, increase efficiency, improve stroke conditions and moral and psychological satisfaction, an eye is made at the end of the oar handle, and of the drawn rod at the oarlock, the second rod is pivotally attached with an eye at the opposite end, the second rod and the handle are pivotally connected to the L-shaped handle-holder with the formation of the articulated parallelogram system together with the oarlock, and the L-shaped holder-handle is made of circular cross section, gummed from the outside and has a length of not less than two widths of the arm.

Images