JPH01218993A - Motive power transmitter - Google Patents

Abstract

PURPOSE:To use a thing both as a bicycle and a motorcycle and also, reduce the noise of an engine by transmitting the rotation of a direct current motor to the surface of a tire through a roll, and cutting off the electric current of the direct current motor end then, separating the roll from the surface of the tire. CONSTITUTION:It is so constituted that the pressing attachment and separation of a roll 3 and a tire 4 are done in a way in which the roll 3 is attached pressingly to the surface of the tire 4 by pulling a wire 7 by means of a lever 6 fitted to a handle and simultaneously, a switch is closed and a motor is rotated, and when the lever 6 is set free, the switch is opened and simultaneously, the wire 7 loosens and the roll 3 is separated from the surface of the tire 4. As a result, a combined use of a bicycle and a motorcycle can be accomplished, which is economical, and also, prevents exhaust gas from being dispersed and the noise of an engine from being generated.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a power transmission device for driving a two-wheeled vehicle used as a vehicle with a light and simple mechanism.

(b) Conventional technology Two-wheeled vehicles, represented by bicycles, are widely used as the easiest means of transportation.

Furthermore, in principle, motorized bicycles and motorcycles (hereinafter collectively referred to as "Bites"), which are bicycles with engines attached to them, are convenient vehicles that are intermediate between cars and bicycles.

Bicycles are a convenient means of transportation, but because they rely on human leg strength for power, riding long distances can be extremely tiring, especially when going up hills, which can be more tiring than walking. Baits with an engine can travel long distances and can easily run on steep slopes thanks to the transmission, but since they are powered by an internal combustion engine that uses gasoline, they produce large amounts of exhaust gas and exhaust gas. produce sound. Typical Bites are reciprocating engines with a small number of cylinders, making them unsuitable for low-speed rotation and requiring a large muffler for the engine's proportions.

The horsepower of the engine tends to be too high considering the road conditions and driving speed, and even the smallest Baitsu has an engine that is only a few hp. Although there has been research on running Bites on electricity for some time, it has not yet been put to practical use.

(c) Problems that the invention aims to solve: The lighter a bicycle is, the more energy it can save when running, so lighter bicycles have been developed, but since the rider's weight is added to the weight of the rider, there is a limit to how much energy can be saved. .

As mentioned earlier, Bi-2 has a larger engine and requires a muffler and gear shift allowance, making the engine-related components heavier. The vehicle body had to be built to support the engine and be sturdy enough to be safe even at high speeds, and in order to transmit that powerful force to military transport, the weight of the power transmission mechanism increased, resulting in the overall weight of the vehicle.

Therefore, even if the Bi2 stops running due to engine trouble or running out of fuel, it cannot be ridden by stepping on the pedals like a bicycle.

Motorized bicycles used to exist, but one of the reasons why they have disappeared recently is that engine performance has improved and breakdowns have decreased due to technological advances made by manufacturers. This is thought to be due to the increase in the weight of the army as a whole.

However, if the engine and power transmission device are small and lightweight, and the speed is not too fast, then it may be possible to use it with the -a bicycle and attach power to it, and it will be reconsidered as a vehicle between Bi-2 and a bicycle. There is a need.

(d) Means to solve the problem The most suitable small and light engine is the Karin Tachibana Seki, but when the engine stops, it is necessary to start it using the power of the pond. Even if an electric motor stops due to overload, it will resume rotation on its own once the load is reduced.

In particular, DC series-wound motors exert great power in situations like this. A DC motor (4) incorporating a strong permanent magnet is also small and powerful, and as a power source for effectively carrying out this invention, a DC motor is suitable, although there are differences depending on the model.

A rough estimate of the amount of power required to run a bicycle is as follows.

First, as a guideline for the minimum required power, a person weighing 60 kg is 2
12km/h on a flat asphalt road with a 0kg bicycle
Assume that the vehicle is traveling at m. However, the conditions are that the wind speed is 0, the internal resistance of the bicycle is 0, and the acceleration energy when starting is also ignored.

The rolling friction coefficient of a flat asphalt road is 0.00.
6, rolling resistance is (60+20)Xo, 006=0.48kg air resistance is 0, 36
3kg 0.36 is the cross-sectional profile of a person and a bicycle (a) 0.0045 is the air resistance coefficient required to maintain a speed of 12 km/h (3.3 m/s) against the running resistance of 0.48 + 0.23 = 0.71 kg The power is 0.71x3.3/75 - approximately 0.03 horsepower, which is about 30 watts I.

In reality, the internal resistance of a bicycle alone is quite significant, so the above numbers are simply calculated values on paper, but if we modify the conditions to determine how much is actually required, we arrive at Inukiji's numbers.

(Passengers weighing 460 kg also wear clothes, so the total weight is 70 kg.
, The bicycle weighs 30 kg including the cargo, the road condition is a rolling resistance factor of 0.02 (gravel road), and the cross-sectional area of the person and bicycle is 0.5rr? , the wind speed is 5 m/s (18 km/h)
), the road is a 3 degree uphill slope, and the internal resistance of the bicycle is 50%, so the rolling resistance is (70 + 30) Xo, 02 = 2 kg. The air resistance is 0.5
)2 Approximately 2 kg The pitching resistance is (assuming Sin3° is 0.052) 100x
0.052 = 5.2 kg Internal resistance is (2 + 2 + 5.2) Horsepower (electricity equivalent: 0
．． 5 kilowatts), which is a much different value from the previous calculation.

However, even this value is too small for acceleration resistance.
I can't feel the feeling when starting from an intersection in Bi2.

However, this invention was not about the development of a sporty two-wheeled vehicle; A running device that can be used to ride a bicycle down a gentle slope is sufficient, and using more powerful power is dangerous unless the bicycle body is modified.

Therefore, if the power transmission device is suitable,
As a large wheel for deceleration, use the wheels and tires as they are.
The objective is to achieve the purpose by making the whole vehicle compact and lightweight, and it is sufficient to use a small storage battery as a power source suitable for short-distance travel.

(E) Action: If you have a compact, lightweight prime mover and power transmission device,
It can be used by attaching it to a regular bicycle when needed, and it can also be detached and ridden with a pedal when not needed. If the horsepower of the prime mover is insufficient, it is also possible to use Hetal in conjunction with human power.

(f) Example 2 The power transmission device of the present invention was attached to the front tire of a 4-inch practical bicycle as shown in FIG.

To press and release the tire from the roll of the power transmission device, pull the wire 3 using the lever attached to the handle.The roll or tire surface will be crimped at the same time, the switch will be closed and the electric motor will rotate, and when the lever is lifted, the switch will open. The structure is such that the wire loosens and the roll separates from the tire surface.

The actual driving test was conducted using a DC motor with a maximum output of 100 watts using a permanent magnet for the field, and a rotating speed of 3 gears.
I tried to slow down, but it didn't have much of an effect, only slightly increasing the coasting distance when I ran up to Bethal. Analysis of the reasons for this revealed that in addition to the DC motor's output being too low, the maximum output was not being achieved, and the reduction gear's internal resistance was large.

Next, we tested a series-wound DC motor by modifying and installing a starting motor for a mini passenger car, and found that it was possible to drive at speeds of over 15 km/h on a flat asphalt road, and in reality, it was possible to drive at speeds of more than 15 km/h on a flat asphalt road, and in reality, it was possible to drive at speeds of over 15 km/h by releasing the lever from time to time. I decided to run.

Although an automotive lead-acid battery was used as the power source, its capacity is considered excessive, and for practical purposes, a smaller battery would be sufficient.

Also, if the force of pulling the lever is weak, slippage will occur between the tire and the roll, but this can be prevented by attaching an electromagnet to the DC circuit to improve the tightness between the tire and the roll.

(I-) Effects of the invention By utilizing this invention, the range of activities of bicycles will be further expanded,
Life becomes more convenient.

The parking area is no different from that of a regular bicycle, and there is no exhaust fumes or engine noise.

It can also be effectively used for three-wheeled bicycles.

The manufacturing cost is also significantly lower than the Bi-7, and since it can be removed and used when it is not needed, there is no need to have both the Bi-7 and the bicycle as in the past, making it economical.

In this way, this invention contributes to improving people's lives.

[Brief explanation of the drawing]

FIG. 1 shows an example in which the power transmission device of the present invention is attached to the front wheel of a bicycle.

Claims (1)

[Claims] It is equipped with a mechanism that transmits the rotation of the DC motor to the roll, and at the same time when current is passed through the DC motor, the roll contacts the tire surface of one of the wheels of the two-wheeled vehicle to apply rotational force to the wheel. A power transmission device characterized by a structure in which the roll separates from the tire surface when the current is interrupted.