CN203864979U - Paddle for improving transmission useful work - Google Patents

Abstract

The utility model provides a paddle for improving transmission useful work of a sculler. The paddle for improving transmission useful work is characterized in that a paddle handle, a paddle rod and a paddle blade are movably connected through rotating shafts, the paddle blade and a force arm are fixedly and integrally connected, a steel rope penetrates out from the middle of the paddle rod, one end of the steel rope is connected with the force arm through a first pulley and a second pulley, the other end of the steel rope is connected with a steel rope fixing ring and then is fixed on a paddle rack or fixed on a ship board, the force arm is provided with a force returning spring which is connected with the paddle rod, the paddle rod is provided with a supporting ring groove which is combined with a paddle rod support on the ship board or combined with a paddle rack supporting frame on a race boat. The paddle for improving transmission useful work is simple in structure, obvious in efficiency, and beneficial to improving the speed of boating.

Description

Improve the quant of transmission useful work

Technical field

The utility model relates to a kind of quant of the transmission useful work that can improve the person of rowing the boat.

Background technology

Hand oar for rowing, outboard part of the oar is the structure being fixed as one now, and this oar is entering after water, when loom post-tensioning, the blade of its front end is in the time striking, be that the support place of going up on the quarter along loom is that a camber line is drawn in the center of circle, thereby thrust can be decomposed into 2 component, one is the power that ship is advanced, do useful work, another is outside component, and what do is idle work.Along with moving closer to of the perpendicular line of loom and ship sense of motion, the person's of rowing the boat useful work efficiency just reaches 100%, all for ship is advanced; In the time of the perpendicular line of loom thwartships sense of motion, useless component produces again thereupon, gradually large, and just direction is contrary when entering water, sensing hull.

The dragonfly frog is in the time of swimming, and the plane that flippers opens (being similar to blade) but always keeps as much as possible perpendicular to the direction of advancing.According to dragonfly frog swimming principle, improve the quant of transmission useful work, can make blade be subject to force direction all the time with axial (sense of motion) keeping parallelism of ship sense of motion, reduce generation idle work as far as possible.

Summary of the invention:

Improve the quant of transmission useful work, it is characterized in that loom 1, loom 2 pass through turning cylinder 3 active links with blade 4, blade 4 fixes as one with the arm of force 5, steel cable 6 passes in the middle of loom 2, by the first pulley 7, the second pulley 8, one is connected with the arm of force 5, a connection steel cable set collar 9, then be fixed on rowlock or be fixed on ship side, and on the arm of force 5, there is a return spring 11 being connected with loom 2, on loom 2, have support annular groove 10 to combine with the loom support on ship side, or rowlock bracing frame in racing boat is combined.

Beneficial effect:

Simple in structure, efficiency is remarkable, is conducive to improve the speed of rowing the boat.

Brief description of the drawings:

Fig. 1 is the utility model structural representation.

Wherein: 1-loom, 2-loom, 3-turning cylinder, 4-blade, the 5-arm of force, 6-steel cable, 7-the first pulley, 8-the second pulley, 9-steel cable set collar, 10-support annular groove, 11-return spring.

Fig. 2 is that this uses novel theory to calculate schematic diagram

Detailed description of the invention

Embodiment: referring to Fig. 1, while using the quant that improves transmission useful work, first support annular groove is put on the loom support of ship side both sides, or combine with the support installation place of the rowlock (standard configuration in general racing boat) in racing boat, steel cable set collar is chosen in to the correct position on ship side or on rowlock, adjust and fixing steel cable length, method of adjustment is to make the quant of raising transmission useful work vertical with hull, (being that blade is also vertical with hull) again.At this moment loom is released forward, the tail rear portion, both sides from ship is entered water by blade, steel cable is drawn out, return spring is stretched, blade just keeps the state of vertical with hull (vertical with the sense of motion of ships and light boats) to enter water, along with loom pulls back, second approaches to the attachment point of steel cable set collar together with loom, steel cable is under blade is struck the combined action of resistance and return spring, in income loom, be released into the blade arm of force, until oar goes out the water surface, blade be subject to force direction will remain unchanged (vertical with hull).Until after blade water outlet, draw and get back to quarter of a ship then repeating motion on the water surface.

The theoretical efficiency of calculating raising transmission useful work can reach 10%, establishes: ships and light boats are Fy in the suffered thrust of sense of motion, and the distance that ships and light boats move at sense of motion is Y, and F is the resistance that oar overcomes in the time of water skiing the useful work W1 doing, the useful work W2 that bionical oar does.

: Fy=Fcost Y=Lsint

1、W＝Fy·Y

dY＝Lcost·dt

dW＝Fy·dY＝F·Lcos ²t·dt

$\begin{array}{c}\∴W1=2\underset{0}{\overset{a}{\∫}}\mathrm{FL}\frac{1+\cos 2a}{2}\mathrm{dt}\\ =\mathrm{FL}\underset{0}{\overset{a}{\∫}}(1+\cos 2t)\mathrm{dt}=\mathrm{FL}(t+\frac{\sin 2t}{2}){|}_0^a=\mathrm{FL}(2+\frac{\sin 2a}{2})\end{array}$

2、S＝2Lsinα

If: half α=45 of paddle angle ° W2=2LFsin α

$\frac{W2}{W1}=\frac{2\sin a}{2+\frac{\sin 2a}{2}}=\frac{4\sin a}{2a+\sin 2a}=\frac{2\sqrt{2}}{\frac{\mathrm{\π}}{2}+1}=110\%$

Claims (2)

1. improve the quant of transmission useful work, it is characterized in that loom (1) loom (2) and blade (4) link by turning cylinder (3) is moving, blade (4) arm of force (5) fixes as one, steel cable (6) passes in the middle of loom (2), by the first pulley (7), the second pulley (8), one is connected with the arm of force (5), a connection steel cable set collar (9), is then fixed on rowlock or is fixed on ship side.

2. the quant of raising transmission useful work according to claim 1, it is characterized in that, on the described arm of force (5), there is a return spring (11) being connected with loom (2), on loom (2), have support annular groove (10).