JPS6139069B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine-driven model toy, particularly an engine-driven model toy that includes an engine, a motor connected to the engine, and a power battery, which functions as a motor when the engine is started, and which operates as a motor during engine operation. The engine has a motor that has both functions of functioning as a dynamo and charging the above-mentioned battery, and has a reduction mechanism that can switch the rotational speed ratio of the engine and motor to predetermined values respectively when the engine is started and when the engine is running. The present invention relates to an engine-driven model toy having a switching mechanism capable of switching the battery of a power supply connection circuit from series connection to parallel connection.

In general, engine-driven model toys, such as model airplanes, include a driving engine, a control device that starts the engine or controls the engine and the aircraft, and a battery that can be charged as a power source to operate these.
It is equipped with Ni-Cd batteries, etc.

Conventionally, the engine of the model airplane was started by turning the propeller by hand, but this was very cumbersome and there was a risk of injury from being hit by the rotating propeller. For this reason, an external engine drive means (such as an engine starter) is separately prepared and used to start the propeller, but this requires a separate drive means and the cost of the device is high. There were flaws. In addition, it is equipped with an engine starting motor and is connected to the engine drive shaft via a speed reduction mechanism such as a gear with a clutch.
The engine was started by the engine starting motor. However, in this case, the motor becomes useless after the engine starts, and although it is in a free state with the clutch, it increases the weight of the machine, causing a loss in engine output. In order to start the engine, the battery is consumed accordingly, and it becomes necessary to charge the battery with a charging device as necessary.

In addition, some actual vehicles such as motorcycles are equipped with a motor for starting the engine and a generator for charging the power battery separately, but in this case, there are disadvantages of high cost and increased weight of the machine. For this reason, even if this method is applied directly to engine-driven toys, it would be expensive to incorporate a battery charging generator separately from the motor.
In addition, model airplanes have drawbacks such as being too heavy compared to the engine output and cannot fly, so they cannot be applied to engine-driven toys.

The present invention aims to solve the above-mentioned problems, and focuses on the fact that a DC magnet motor works as a motor in response to an external power supply, and conversely works as a dynamo when mechanically driven from the outside. , An engine drive model that operates as a motor at high output when starting the engine and uses electricity from the battery to start the engine, and while the engine is running, the rotational force of the engine operates as a generator to charge the battery. The purpose is to provide toys. Due to the weight limit, a so-called motor-generator is created by skillfully combining a relatively small-output engine, a relatively small-output rotating electrical machine, and a relatively small-capacity battery.・The purpose is to provide a system. The present invention will be explained below with reference to the figures.

FIG. 1 is a perspective view of essential parts in one embodiment of the present invention, and FIG. 2 is a perspective view of a motor in one embodiment of the present invention.
The dynamo switching electrical circuit diagram is shown.

In FIG. 1, M is a DC magnet motor used in the present invention, 1 is a first pinion gear fixed to the rotating shaft of the motor M, 2 is a gear with a first clutch, 3 is a first drive gear, and 4 is a first gear with a clutch. is the first clutch, 5 is the intermediate gear, 6 is the drive shaft, 7 is the
is a second pinion gear, 8 is a gear with a second clutch, 9 is a second clutch, 10 is a second drive gear, 11 is a crankshaft, 12 is a crank,
13 represents a piston, 14 represents an engine, and 15 represents a spark plug.

The first clutched gear 2 includes a first drive gear 3 and an electromagnetically driven first clutch 4 capable of transmitting rotation to the drive gear 3 in only one direction. The intermediate gear 5 is provided at one end of the drive shaft 6 and meshes with the first drive gear 3. A second pinion gear 7 is provided at the other end of the drive shaft 6, and the second pinion gear 7 meshes with a second drive gear 10 of a second clutched gear 8. The gear with a second clutch 8 includes the second drive gear 10 and an electromagnetically driven second clutch 9 capable of transmitting rotation in only one direction to the crankshaft 11, and is attached to the crankshaft 11. There is. A crank 12 is attached to the other side of the crankshaft 11, and a piston 13 is provided at the tip of the crank 12. The piston 13 can be driven by an engine 14, and the engine 14 is provided with a spark plug 15 as is well known.

In FIG. 2, 16 is a starter switch;
7 is a first relay; 18 is a battery consisting of two sets of Ni-Cd (nickel cadmium) batteries 18A and 18B; 19, 20, 21, 22;
are changeover switches 19A, 19B, 2, respectively.
0A, 20B, 21A, 21B, 22A, 22B
23 is the second relay for holding the contact, 24 is the main switch, 25 is X,
A regulator whose output and input points are indicated by Y and Z is used to adjust the load voltage and also to adjust the voltage so that the battery 18 can be charged even when the engine speed is low. 26 represents a switch.

When starting the engine, the starter switch 16 is turned on in FIG. As a result, the first relay 17 is activated and the changeover switches 19 and 2 are activated.
0 and 21 are switched to contacts 19A and 2, respectively.
0A and 21A are connected. When the main switch 24 is closed in this state, the battery 18B will move from the contact 20A to the contact 19A to the battery 18A to the solid line arrow.
Current flows through the circuit of contact 21A, motor M, main switch 24, and battery 18B, and motor M is rotated as a motor by batteries 18A and 18B connected in series. Therefore, the rotating shaft of the motor M shown in FIG. 1 and the first pinion gear 1 rotate in the direction of the arrow a. This rotation is transmitted to the intermediate gear 5 in the direction of arrow c via the first drive gear 3 and decelerated, and the rotation of the intermediate gear 5 is transmitted via the drive gear 6 to the second
It is transmitted to the pinion gear (direction of arrow d) and further decelerated by second drive gear 10 (direction of arrow e). In this case, the gear 2 with the first clutch
The first clutch 4 connected to the gear 8 is turned off, and the second clutch 9 connected to the second clutch gear 8 is turned on. As a result, the crankshaft 11 is rotated in the direction of arrow e, which is the same direction as the second drive gear 10, and the rotation of the crankshaft 11 drives the crank 12 up and down, and the piston 13 performs piston movement. In addition,
Since the first clutch 4 is in the OFF state in this case, the crankshaft 11 is connected to the first drive gear 3.
The first drive gear 3 is free from the
The rotation of the crankshaft 11 is not directly transmitted to the crankshaft 11.

At this time, as shown in FIG. 2, the second relay 23 is activated, switches the changeover switch 22, and connects the contact 22A, so that current flows to the ignition coil and ignites the spark plug 15 in accordance with the vertical movement of the piston 13. As a result, the engine 14 is started and enters the operating state. Note that the second relay 23 connects the contact 22A of the changeover switch 22 to, for example,
Hold it at 2V until the voltage drops and continue to flow current to the ignition coil. and battery 1
The current at 8 is sent to the receiver and servo motor through switch 26 which cooperates with main switch 24.

After the engine 14 is driven, when the starter switch 16 is turned off in FIG.
Switches to the B, 20B, and 21B sides. As a result, the circuit connects the batteries 18A and 18B, which are connected in parallel by the contacts 19B and 20B, from the motor M working as a generator to the contacts 21B - point Z - regulator 25 - point Y - contact 22A - battery. 18 - Charging is performed by a charging circuit passing through main switch 24.

In this state, in FIG.
Clutch 4 is turned on and second clutch 9 is turned off. For this reason, the rotational force of the engine 14 is transmitted to the crankshaft 1 via the crank 12.
1 and rotate the first clutch 4 in the direction of the right arrow L. The first pinion gear 1 is driven directly by the drive gear 3 via the first clutch 4. As a result, the load on the engine 14 is significantly reduced compared to when the motor M is driven via the drive shaft 6. Note that even in this charging state, the second relay 23 continues to operate, and since the contact point 22A is closed, power continues to be supplied to the ignition coil, receiver, etc. Also regulator 25
serves to adjust the load voltage applied between point X and point Y. That is, in this type of device,
Even when the motor M is operating as a generator and the rotation speed of the engine 14 is sufficiently low, battery 1 may occur.
It is designed to charge 8A and 18B. For this reason, when the engine 14 is in a high speed rotation state, the terminal voltage of the generator becomes too high, but the regulator 25 has a voltage on the load side that is a little higher than 5V, for example, regardless of the rotation speed of the engine 14. The so-called series resistance value between the Z point and the Y point is controlled so as to maintain .

As a result of the experiment, motor M was driven with a voltage of 10V using two sets of four 1.25V Ni-Cd batteries connected in series, and the rotational speed of motor M was reduced to 1/9. The engine 14 is started.
Therefore, the engine 14 is started with a large torque. However, if this continues even after the engine 14 enters the operating state, the rotational speed of the motor M will be increased to nine times the rotational speed of the engine 14, resulting in an extremely large engine load, and the engine output will be consumed for this purpose. In the case of a model airplane, it becomes impossible to fly. Therefore, engine power loss (approximately 10
%), the drive is switched to via the first clutch 4, and the speed is increased by about 2.5 times. That is, when the engine speed is 4,000 to 11,000 rpm, the motor M (dynamo) speeds up 2.5 times, and a power of 2A and 10-odd V is obtained, and this power is controlled by the regulator 25 to a level slightly higher than 5V. to charge the battery 18. In other words,
The motor M is designed to be as small as possible, to obtain the high output necessary for starting the engine, to reduce the load on the engine during engine operation, and to charge the battery.

Although the above description has mainly been made regarding a model airplane, it goes without saying that the present invention can also have similar effects on model running toys such as engine-driven model cars and ships. It is also possible to use one-way clutches other than electromagnetic clutches.

As explained above, in the present invention, in an engine-driven model toy that includes an engine with a limited output, a small motor connected to the engine, and a power battery, the motor is activated by a high-output motor when the engine is started. During engine operation, the motor is operated as a dynamo to charge the battery while reducing the load on the engine. Therefore, it is possible to start the engine and charge the battery simply by turning the switch on and off. As a result, it is possible to prevent injuries to fingers and the like when starting the rotation of the propeller, and there is no need to prepare a separate starting motor or a separate charging generator. Furthermore, since a Ni-Cd battery is used, it is possible to drive the motor M at high output when the engine is started, and the overall weight is reduced. Furthermore, since the Ni--Cd battery is a rechargeable battery, it is possible to start and stop the engine as appropriate and at will, and there is no problem in starting the engine due to over-discharge of the battery. Furthermore, the above power supply can be shared with the power supply for the receiver, and for example, compared to conventional model airplanes, it can be controlled for a long time using servo motors, automatic stabilizers (gyroscopes), etc., and the power supply for the receiver can be There is no possibility of an uncontrollable state due to discharge, improving safety.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of essential parts of one embodiment of the present invention;
The figure shows a motor/dynamo switching electrical circuit diagram in one embodiment of the present invention. M is the motor, 1 is the first pinion gear, 2 is the first
A gear with a clutch, 5 is an intermediate gear, 6 is a drive shaft, 7 is a second pinion gear, 8 is a gear with a second clutch, 11 is a crankshaft, 12 is a crank, 13 is a piston, 14 is an engine, 15
16 is a starter switch, 17 is a first relay, 18 is a battery, 19 to 22 are selector switches, 23 is a second relay, 24 is a main switch, 25 is a regulator, and 26 is a switch.

Claims (1)

[Scope of Claims] 1. An engine-driven model toy comprising an engine, a motor connected to the engine, and a battery for power supply, wherein when the engine is started, electric power from the battery is used to start and drive the engine, and the engine is operated. The engine includes a motor that can be rotated by the rotational force of the engine to charge the battery as a dynamo, and the rotational speed ratio of the engine to the motor when the engine and the motor are started and during engine operation is provided. are connected to each other via a speed reduction mechanism that can be switched to a predetermined value, respectively, and are provided with a connection circuit for the power battery of the engine drive motor, and the connection circuit connects multiple sets of unit batteries in series when starting the engine. An engine-driven model toy, characterized in that it has a switching mechanism that allows the unit batteries to be connected in parallel while the engine is operating.