JPH03153486A - Trycycle with electric motor - Google Patents

Abstract

PURPOSE:To better facility for bodily effete persons such as the aged, by making it to mount a storage battery and an electric motor, to close a motor drive circuit after a saddle switch operates with a rider seated, and to perform voltage control over the motor with tension variations in a belt or the like at time of pedal operation. CONSTITUTION:When a rider is seated on a saddle, a saddle switch 41 is closed and thereby a motor drive circuit inclusive of an electric motor 15 and a storage battery 16 is formed there. On the other hand, with tension variations in a pedal drive chain being produced at time of treading a pedal, a gradient in an idler base 12 is varied as well. In brief, when starting pedal operation, the inclination gradually grows larger, and a brush 29 joins contacts 31 and 36 together, forming a circuit provided with a brake resistor 37, thus forced into a brake release state. Next, it successively moves from the contact 32 to 35, a current for the motor 15 increases and speed is upped. With this constitution, facility for the aged becomes improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention includes a storage battery and an electric motor mounted on a tricycle, and the output of the electric motor of the tricycle is adjusted according to the force with which a rider depresses the pedals. Regarding the structure of electric tricycles, which are increasing in number.

[Conventional technology]

Regarding electric bicycles, please refer to IEEJ Paper 60-B33P9
5-P102 F Basic research on electric bicycles”
There is an example of a two-axle vehicle, but it has only one resistance stage and three gears, but this is the same running speed as a bicycle, i.e. 2
The speed is equivalent to 0 km/h, and the speed is not controlled by chain tension.

[Problem to be solved by the invention]

When considering the above-mentioned conventional technology as a target for elderly people, except those who are physically fit and have good motor skills, it is dangerous to ride a two-wheeled vehicle because they are unsteady, and their reflexes are slow, so the vehicle speed is 5 to 6 km. /h, and conventional systems do not take this into account. Wheelchairs are for people who have difficulty moving.Although the present invention can move on its own, it is difficult for people who are tired to walk on public roads after shopping for several weights. The purpose is to provide mobility aids for people who are weak in their legs and feet, such as getting tired from a round trip of about 10 kl, but are able to walk on their own.6 [Means to solve the problem] ] In order to achieve the purpose of the Oxki, a tricycle was created for those who were unsteady and could not find stability on a two-wheeled bicycle, making it more stable, and making it possible for people who were unable to ride a bicycle when they were young to ride a bicycle. Furthermore, by installing a shopping basket in the back, it is no longer necessary to carry heavy items, making it easier to go shopping. Also, to prevent my legs from getting weaker and weaker, I tried not to run unless I stepped on the pedals, so that I never forgot the feeling that I was running with my own will, that is, with my own legs, and I started moving my legs all the time. When you feel danger, you have to turn off a normal electric bicycle, which is an unfamiliar action, and if you don't do it all the time, you may get flustered and not be able to operate it properly. In contrast, humans have been walking for many years and can instinctively stop if they sense danger. The present invention is devised so that the brake is applied when the pedal is stopped, and consideration has been given to safety.

[Effect]

? B? ii The battery is the power source that moves the electric motor, and the electric motor generates power according to the rider's pedal pressure, and can run even if the rider steps on it lightly.6 If the belt or chain breaks, the idler will It is safe because it works in the direction of stopping due to its own weight.

In addition, in order to prevent children from riding off on their own even if a child accidentally uses the pedals of a tricycle when there is no rider present, a saddle switch is installed so that the battery and electric motor circuits are not connected unless the first rider is seated on the saddle. It has become.

[Supplementary example]

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 1 and 2. FIG. 1 shows an electric tricycle according to the present invention, and its appearance is almost the same as a conventional tricycle.The electric tricycle 1 has a handlebar 2. Saddle 3° Front wheel 4. Rear wheel idler5. Rear drive wheel6. It is composed of a pedal 7, a pedal drive chain 8, etc.

The drive system will be explained with reference to FIG. When you press pedal 7, pedal 7
The pedal drive chain 8 meshing with the pedal sprocket 9 directly connected to the idle sprocket 1 is driven by the idle sprocket 1.
0, tension is applied to the chain above the pedal drive chain 8, and the two idlers 11 meshing on the outside of the pedal drive chain, together with the idler base 12 supporting them, be pushed up. The idler base 12 rotates around the sensor bin 14 (described later in FIG. 3) of the tension sensor 13, and controls the rotation speed of the electric motor 15 of the magnet field by the rotation angle. The power source at this time is the battery 16. Idle sprocket 17 directly connected to idle sprocket 10
is connected to the electric motor sprocket 1B and the electric motor chain 19, and the rotational force of the electric motor is transmitted to the idle sprocket 1.
7, and the force is further transmitted to the directly connected rotary rod 2.
0 to the idle sprocket 21, and further transmitted to the drive wheel sprocket 23 via the drive wheel chain 22, and then to the drive wheel 6 directly connected to the drive wheel sprocket 23. Therefore, the force of the electric motor 15 and the force of pressing the pedal 7 act on the drive wheels 6.

When the pedal 7 is no longer pressed, the idler 11 returns to its original position and the driving force of the electric motor 15 is eliminated.

Next, the structure of the tension sensor 13 will be explained with reference to FIG.

The tension sensor 13 is rotatably installed on an insulating base 24 via a lubricating resin sleeve 25, and is equipped with a thrust washer 26 that reduces friction on the idler base 12.
The brush holder 27 and the idler base 12 are secured to the sensor pin 14 with screws ib, and are further fixed to the sensor pin 14 with nuts 1 to 1. Therefore, the brush boulder 27, the idler base 12, and the sensor pin 4 are installed so that they can rotate together.

A brush 29 that is pressurized by a brush spring 28 is housed in the brush holder 27. Brush 2 has contact point 30
~35 and the contact point 3G, and as the rotation angle of the idler base 12 increases from small to large, the rotation angle is 30-36.31-36.32.
-36.3336.34 36.35 Combine with 36.

The contact 36 is connected to one terminal of the motor 15, the contact 30 is connected to the other terminal via the brake resistor 37, the contact 31 is not connected, the contact 32 is connected to one of the starting resistors 38, and the contacts 33 to 32 are connected to one terminal of the motor 15. 35 is connected to the center tap of each starting resistor 38, and one end of the starting resistor 38 is connected to the battery 1-6.
Connect to the positive.

The terminal of the electric motor 15 connected to the brake resistor 37 is connected to the saddle contactor 40. It is connected to the negative terminal of the battery 16 via the battery switch 39.

The saddle contactor 40 is installed under the saddle 3 and is activated by a normal oven saddle switch 41 that is activated by the weight of a person riding on the vehicle. That is, the saddle switch 41
When is open, the saddle contactor 40 becomes an oven.

Next, the manner in which the idler base 12 is tilted at an angle O due to the force of pressing the pedal 7 will be explained with reference to FIGS. 5 and 6.

When the pedal force P on the pedal 7 is zero, the idler base 12 does not move and the center angle of the idler 11 is zero, as shown in Fig. 6, and the pedal force P is zero.
When the value becomes large, the upper idler 11, which creates tension in the pedal drive chain 8, is lifted to one side. On the other hand, since the lower part of the pedal drive chain 8 becomes slack, it is held by the pair of idlers 11 (lower part) and rotates by θ about the sensor pin 14 as shown in the sixth figure on the right.

Next, the operation will be explained.

When the motorized tricycle 1 is stopped and no one is riding it, the saddle switch 41 is OFF regardless of whether the battery switch 39 shown in FIG. 4 is ON or OFF, and the saddle contactor 40 is also OFF and does not move. Next, let us consider a case where a person is on board and the battery switch 39 is turned on. To explain with reference to FIG. 4, the saddle contactor 40 and panteri switch 39 are ON, but while the pedal is not depressed, the tension sensor 13 only connects the contacts 30 and 36, and the circuit supplied from the battery 16 is turned on. Since it is not closed, no current flows.

However, if the three-wheeled bicycle starts to move in this state by dismounting or the like, a counter electromotive force is generated in the electric motor 15 of the magnetic field, and a current flows through the brake resistor 37 to generate a control force. This is because a control force is generated in the same way even when no pedal force is applied to the pedal 7.

Next, when force is gradually applied to the pedal 7, the inclination θ of the idler base 12 increases, and the brush 29
The contacts 31 and 36 are joined. Here, the brake resistance 37 is seen, so if you get off the board, you will be in a free state and will start running, but on a flat road, the driving force of the electric motor 15 is not generated and the pedal force is small, so it does not move. Since the contacts 32 and 36 are connected, a current flows through the starting resistor 38 and a driving force is generated in the electric motor with the weakest force, so that the three-wheeled bicycle gradually starts moving. By increasing the pedal force, the circuit resistance value flowing through the starting resistor 38 becomes smaller, so the speed becomes faster. The maximum speed will rise to about 5-6 km/h.

If you feel danger, the pedaling force suddenly decreases and when it reaches zero, brush 2.
9 returns to the initial state where contacts 30 and 39 are connected, current flows through brake resistor 37, and braking is applied.

〔Effect of the invention〕

As described above, according to the present invention, even an elderly person with weak legs can ride the vehicle and move it with less force, and when stopping the vehicle, the deceleration force is applied by instinctively stopping to press the pedal. It can be stopped.

Furthermore, when no one is on board, the saddle switch prevents children from running off easily, making it safer.

Also, I always have to move my feet and press the pedals, so
It also has the effect of preventing your legs from weakening.

[Brief explanation of the drawing]

Fig. 1 is an external view of the electric tricycle of the present invention, Fig. 2 is an explanatory diagram of the drive system, Fig. 3 is a sectional view of the tension sensor, Fig. 4 is a wiring diagram, and Fig. 5 is the operation of the tension sensor. FIG. 6 is a partial view of FIG. 5.

Claims (1)

[Scope of Claims] 1. A three-wheeled bicycle with pedals consisting of one front wheel and two rear wheels, or two front wheels and one rear wheel, which is equipped with a storage battery and an electric motor, and a belt or chain that transmits power when the rider steps on the pedals. When the tension changes, a force is applied to the idler meshing with the side of the belt or chain that receives the tension (usually the upper part), and a force is generated on the shaft that supports the idler, but this force causes a change in the force on the idler support. Alternatively, the movement of the support is detected by a sensor, and the speed is controlled by controlling the voltage to the electric motor installed to drive the wheels based on the signal, and a saddle switch is provided that opens the electric motor drive circuit when the rider gets off. A three-wheeled bicycle with an electric motor. 2. An electric motor characterized in that the control mechanism according to claim 1 is provided with a circuit configuration that acts as a brake even if a force trying to drive the electric motor from the wheel side acts when the pedal force is zero. Three-wheeled bicycle. 3. An electric three-wheeled bicycle characterized by having a function of mechanically applying a brake in conjunction with the saddle switch according to claim 1. 4. An electric three-wheeled bicycle according to claim 1, characterized in that when a charger is mounted on the three-wheeled bicycle, it can be freely attached and detached.