CN2442932Y - Speed increasing driving device for bicycle - Google Patents

Abstract

The utility model relates to a walking-type driving device, which is a driving device for improving the driving efficiency of the bicycle. The utility model is composed of four pedals and a pair of steering speed increasing gears are additionally arranged on the bicycle. Using the driving way to drive, the running speed can be improved by 40 percents under the same motion intensity.

Description

Bicycle speed increasing actuating device

The utility model relates to a kind of mechanical actuation device (hereinafter referred to as the speed increasing actuating device) that improves the bicycle drive efficiency.

At present, known bicycle comprises that rickshaw, three-wheel vehicle, bicycle driving mode all are that the people is sitting on the seat cushion will to ride forward with pin and rotates, drive the chain wheel drive car by chain and advance, this actuating device (stepping on the formula actuating device to call in the following text to sit) exists the problem that drive efficiency is low, moving velocity is slow.

The purpose of this utility model provides a kind of bicycle that makes and drives a kind of faster actuating device of more laborsaving moving velocity.

The purpose of this utility model is achieved in that respectively install two on the bicycle both sides cylindrical foot-operated, two on every limit is foot-operated all to be had 180 ° of one's own and distributes by the axle center, two lines of two lines in the left side and the right are orthogonal, between foot-operated and chain, a pair of commutation multiplying wheel is arranged, this has two effects to gear: the one, change hand of rotation, and the 2nd, rev up.When the people drives car, stand in foot-operated upward samsara and walk to step on, utilize human body gravity to help work done, drive laborsaving, walking fast speed purpose thereby reach.The efficient that this type of drive improved, can be tentatively definite from following calculating:

If the foot-operated radius of gyration is R, sit when stepping on the formula driving, to establish to ride and circle around axle, people institute work is M ₁, then $M_1=2{\∫}_0^{\mathrm{\π}}{F}_{1}R\sin \mathrm{\θd\θ}=2F_{1}R{|}_0^{\mathrm{\π}}(-\cos \mathrm{\θ})=2F_{1}R(-\cos \mathrm{\π}+\cos 0)$ $=2F_{1}R(1+1)=4F_{1}R$

When speed increasing drove, establishing foot-operated was M around the axle people institute work that circles ₂, then ${\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="Y9925305800051.png"\; state="\{\{state\}\}">M</figure-callout>}}_2=4{\&Integral;}_{\frac{1}{4}\mathrm{\&pi;}}^{\frac{3}{4}\mathrm{\&pi;}}{F}_{2}R\sin \mathrm{\&theta;d\&theta;}=4F_{2}R{|}_{\frac{1}{4}\mathrm{\&pi;}}^{\frac{3}{4}\mathrm{\&pi;}}(-\cos \mathrm{\&theta;})=4F_2(-\mathrm{<figure-callout\; id="3"\; label="cos"\; filenames="Y9925305800051.png"\; state="\{\{state\}\}">cos</figure-callout>}\frac{3}{4}\mathrm{\&pi;}+\cos \frac{1}{4}\mathrm{\&pi;})$ $=4F_{2}R(\frac{\sqrt{2}}{2}+\frac{\sqrt{2}}{2})=4\sqrt{2}{F}_{2}R$

Because sit the formula of stepping on when driving, the propulsive effort of pin is short-cut calculation less than half of body weight G, gets big value, establishes $F_1=\frac{\mathrm{<figure-callout\; id="2"\; label="G"\; filenames="Y9925305800051.png"\; state="\{\{state\}\}">G</figure-callout>}}{2}$ , then $M_1=4F_{1}R=4\&times;\frac{\mathrm{<figure-callout\; id="2"\; label="G"\; filenames="Y9925305800051.png"\; state="\{\{state\}\}">G</figure-callout>}}{2}\&times;R=2\mathrm{GR}$ And speed increasing is when driving, and because of the people is standing, the propulsive effort of pin is human weight G, i.e. F ₃=G, like this, ${\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="Y9925305800051.png"\; state="\{\{state\}\}">M</figure-callout>}}_2=4\sqrt{2}{F}_{2}R=4\sqrt{2}\&times;G\&times;R=4\sqrt{2}\mathrm{<figure-callout\; id="2"\; label="GR\; M"\; filenames="Y9925305800051.png"\; state="\{\{state\}\}">GR</figure-callout>}$ $M_{}$ ${}_2/M_1=4\sqrt{2}\mathrm{GR}/2\mathrm{GR}=2\sqrt{2}/1\&ap;2.8/1$ This shows, when circling together, it is 2.8 times that seat is stepped on formula that speed increasing drives the merit of doing, like this, and when the over-speed gear ratio of multiplying wheel is 1: 2.8, making speed increasing driving rotating speed and the seat formula of stepping on drive revolution ratio again is 1: 2 o'clock, the ratio of two kinds of type of drive institute works is 1: 1.4, and also the velocity ratio that promptly produces is 1: 1.4, and promptly the people drives car under identical exercise intensity, the speed that speed increasing drives is to sit 1.4 times that step on the formula actuating speed, and promptly speed has improved 40% than originally.

Because adopt such scheme, the people makes the car moving velocity improve 40% under identical exercise intensity, take effect significantly.

Below in conjunction with drawings and Examples this utility model is further specified:

Accompanying drawing 1 is a bicycle speed increasing actuating device composition diagram (side-looking).

Accompanying drawing 2 is bicycle speed increasing actuating device transmission principle figure.

Foot-operated 8. clutch sprocket wheels, 9. chains, 10. gear speedup cases, 11. sprocket shafts, 12. axle drive shafts, 13. bearings of 1. driven gears, 2. sprocket wheels, 3. driving gear 4.5.6.7. among the figure

In the embodiment shown in fig. 1, foot-operated make cylindrically, diameter is 7cm, length is 12cm, and material can be with plastics or wood, and foot-operated strut bar length to the driving gear axle center is 30cm, the gear increaser ratio is 2: 1, and other is as chain, clutch sprocket wheel and known being as good as.

In embodiment illustrated in fig. 2, multiplying wheel is placed in the gear speedup case, be beneficial to the dustproof and lubricated of gear, the antifriction-bearing box on sprocket shaft and the axle drive shaft adopts 6203 common bearings to get final product.

In addition, after adopting the speed increasing actuating device, the tap handle of bicycle need improve 20-30cm, the people is kept upright away step on more comfortable.

Claims (3)

1, a kind of bicycle speed increasing actuating device is characterized in that having four foot-operated and a pair of commutation multiplying wheels.

2, according to the bicycle speed increasing actuating device of claim, it is characterized in that left and right two pairs foot-operated become 180 ° of distributions separately with the axle center, left and right both sides are ridden is wired to 90 ° and vertically staggers.

3, according to the bicycle speed increasing actuating device of claim 1, the over-speed gear ratio that it is characterized in that a pair of commutation multiplying wheel is 2: 1.

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