JP2000061163A - Tail rotor drive assembly for helicopter toy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent the generation of contact sounds, to smoothly transmit rotating force to a tail rotor and to prevent the disconnection of a belt by wear by providing the twisting portion of the belt with an intermediate roller within a tail pipe so that the belt in not is contact with each other. SOLUTION: This tail rotor drive assembly is constituted by winding a drive roller 13 rotated by an engine 11 and a driven roller 21 mounted at the tail rotor 2 by the belt 5 inserted into the tail pipe 4 and rotates the tail rotor by rotation of the belt. The intermediate roller is built into the tail pipe of the portion where the belt twists so that the rotating belt is separated by the intermediate roller 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helicopter toy in which a tail rotor is rotated by a belt such as a timing belt, and relates to a tail rotor driving device for a helicopter toy in which the twist of the belt is smoothly performed.

[0002]

2. Description of the Related Art Conventionally, as a means for rotationally driving a tail rotor in a helicopter toy, the rotational force of an engine is transmitted to a rotary shaft inserted through a tail pipe through a gear mechanism such as a bevel gear, and the rotary shaft is rotated. To transmit the rotational force of the rotor to the tail rotor again via a gear mechanism such as a bevel gear, and a method of winding a roller such as a timing belt between the roller rotated by the engine and the roller attached to the tail rotor. There was.

In the former structure in which the rotational force of the engine is transmitted to the tail rotor by the rotary shaft, a gear mechanism has to be used on the engine side and the tail rotor side, resulting in a complicated structure and cost. There was a problem that the service life was shortened due to wear of the gears as the height increased, and the noise increased.

On the other hand, in the latter structure in which the rotational force of the engine is transmitted to the tail rotor by the roller and the belt, the structure is simpler than that in the former structure, and the cost can be reduced. It has the advantages of long service life and less noise due to the belt drive.

[0005]

However, in the case of the latter structure described above, the driving side roller to which the rotational force of the engine is transmitted and the driven side roller attached to the tail rotor are out of phase by 90 degrees. Therefore, the belt wound between the two rollers is twisted by 90 degrees in the tail pipe.

When the belt is twisted by 90 degrees in a thin tail pipe, the belts come into contact with each other at the twisted portion to generate a contact noise, and friction due to the contact smoothly transmits the rotational force to the tail rotor. However, there was a problem that the belt was cut due to abrasion.

The present invention is intended to solve the above-mentioned problems. An object of the present invention is to provide an intermediate roller in the tail pipe in the twisted portion of the belt so that the belts do not come into contact with each other. Another object of the present invention is to provide a tail rotor driving device for a helicopter toy, which is capable of preventing the generation of noise, smoothly transmitting the rotational force to the tail rotor, and preventing the belt from being cut due to wear.

[0008]

SUMMARY OF THE INVENTION A tail rotor driving device for a helicopter toy according to the present invention is intended to achieve the above-mentioned object. The means includes a driving roller rotated by an engine and a cover mounted on the tail rotor. In a tail rotor drive device in which a drive roller and a belt inserted through a tail pipe are wound, and the tail rotor is rotated by the rotation of the belt, an intermediate roller is built in the tail pipe at a portion where the belt is twisted. However, the rotating belt is separated by the intermediate roller.

When the driving roller and the driven roller are out of phase by 90 degrees, the intermediate roller may be attached at a position where the twisted belt is twisted 45 degrees with respect to the horizontal line. Desirably, further, when the driving roller and the driven roller are out of phase with each other by 90 degrees, the belt in which the intermediate roller is twisted is twisted by 45 degrees with respect to a horizontal line, and It is desirable to mount it at an angle of 45 degrees with respect to the horizontal.

Further, the intermediate roller may be composed of a ring body fitted in the tail pipe and a roller rotatably supported by the ring body.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a tail rotor driving device for a helicopter toy according to the present invention will be described with reference to the drawings. Reference numeral 1 denotes a frame that constitutes a cabin, inside of which components necessary for flight as a helicopter toy such as an engine 11, a receiver, a servo, a gyro, and a fuel tank 12 are mounted.

Reference numeral 11a denotes a pulley supported by the output shaft of the engine 11, and the pulley 11a has a pulley 11 fixed to a drive shaft 11b for rotating the tail rotor 2.
A belt 11d such as a timing belt is wound around c. A gear 11e is fixed to the drive shaft 11b, and a gear 11g fixed to a rotary shaft 11f for rotating the main rotor 3 is meshed with the gear 11e.

That is, since the rotational force of the engine 11 is transmitted to the drive shaft 11b via the belt 11d, the drive shaft 11b is rotated, and the rotational force of the drive shaft 11b is transmitted to the gear 11g via the gear 11e. Therefore, the main rotor 3 is rotated. A drive roller 13 is fixed to the drive shaft 11b.

A fixing member 14 is provided at the rear of the frame 1.
A tail pipe fixed via the tail rotor 2 is rotatably attached to the rear end. A driven roller 21 is attached to the tail rotor 2, and a belt 5 such as a timing belt is wound between the driven roller 21 and the driving roller 13.

By the way, the above-mentioned driving roller 13 is mounted parallel to the horizontal axis, while the driven roller 21 is mounted.
Are attached to the tail rotor 2 so as to be orthogonal to each other, so that the driving roller 13 and the driven roller 21 are
The belt 5 wound between and is twisted 90 degrees on the way. This twist causes the contact as described above, and the smooth rotation to the tail rotor 2 cannot be transmitted, and the problems such as generation of contact noise and abrasion of the belt occur.

Therefore, in the present invention, the intermediate roller 6 having the structure shown in FIG. 5 is mounted in the tail pipe 4, and the intermediate roller 6 prevents the belts from contacting each other at the twisted portion of the belt 5. The structure of the intermediate roller 6 will be described below.

The intermediate roller 6 is composed of a ring body 61 having an outer shape fitted in the tail pipe 4, and a roller 62 rotatably supported in the ring body 61. The ring body 61 is formed with a screw hole 61a for fixing the screw to the tail pipe 4 so as to face each other.
A roller insertion hole 61b is formed with an inclination of 45 degrees with respect to, and a bearing hole 61c is formed orthogonal to the roller insertion hole 61b.

The roller 62 is formed to have a size to be inserted into the roller insertion hole 61b, and a roller shaft 62a fitted into the roller 62 is mounted on a bearing 63 inserted into the bearing hole 61c.

The intermediate roller 6 constructed as described above is inserted into the tail pipe 4 at a substantially intermediate portion thereof, and the roller 62 is inclined from the outside of the tail pipe 4 by a screw 64 at an angle of 45 degrees with respect to the horizontal line. Is screwed on. Of course, when the intermediate roller 6 is inserted into the tail pipe 4, the belt 5 is inserted and fixed so that the belt 5 is located on both sides of the roller 62.

As described above, by inserting the intermediate roller 6 into the tail pipe 4 to separate the twisted portion of the belt 5, the twisted portion does not come into contact with the belt 5 when the belt 5 is rotated. It is possible to smoothly transmit the rotational force to the rotor 2 and prevent problems such as generation of contact noise and wear of the belt.

The mounting position of the intermediate roller 6 with respect to the tail pipe 4 is an intermediate position when the outer diameters of the driving roller 13 and the driven roller 21 are the same, but when the outer diameters are different, the front and rear are arranged. Position offset in the direction, that is,
When the outer diameter of the driving roller 13 is larger than the outer diameter of the driven roller 21, the driving roller 13 is mounted on the side closer to the driven roller 21, and in the opposite case, it is mounted on the side closer to the driving roller 13.

Further, the driving roller 13 and the driven roller 21
If the and are out of phase with each other by 90 degrees, the intermediate roller 6 is attached at an angle of 45 degrees with respect to the horizontal line.
When the driven roller 21 and the driven roller 21 are out of phase with each other by 90 degrees or more, the inclination angle of the intermediate roller 6 with respect to the horizontal line is not 45 degrees.

[0023]

As described above, according to the present invention, in the tail rotor driving device in which the rotational force of the engine is transmitted to the tail rotor by belt driving, the belt in the tail pipe into which the belt is inserted is twisted. Since the intermediate roller is built in the portion so that the belts do not come into contact with each other, it is possible to smoothly transmit the rotational force to the tail rotor, and it is possible to prevent problems such as generation of contact noise and abrasion of the belt.

Further, since the intermediate roller is mounted in the tail pipe in accordance with the twist angle of the belt, the contact between the belt and the roller at the intermediate roller becomes a surface contact, and the belt can be smoothly rotated. This has the effect of reducing frictional resistance.

[Brief description of drawings]

FIG. 1 is a side view showing an entire helicopter equipped with a tail rotor driving device according to the present invention.

FIG. 2 is an enlarged side view showing a belt-driven engine side.

FIG. 3 is an enlarged side view showing a belt-driven tail rotor side.

FIG. 4 is a side view showing a twisted portion of a belt.

FIG. 5 is a sectional view of an intermediate roller.

[Explanation of symbols]

1 frame 11 engine 13 Drive roller 2 tail rotor 21 Driven roller 3 main rotor 4 tail pipe 5 belt 6 Intermediate roller 61 ring body 62 Laura

Claims (4)

[Claims] 1. A drive roller rotated by an engine,
In a tail rotor drive device in which a driven roller attached to a tail rotor is wound around a belt inserted in a tail pipe, and the tail rotor is rotated by the rotation of the belt, the tail of the portion where the belt is twisted is A tail rotor drive device for a helicopter toy, characterized in that an intermediate roller is built in the pipe, and the rotating belt is separated by the intermediate roller. 2. When the driving roller and the driven roller are 90 degrees out of phase with each other, the intermediate roller is mounted at a position where the twisted belt is twisted 45 degrees with respect to a horizontal line. The tail rotor drive device for a helicopter toy according to claim 1. 3. When the driving roller and the driven roller are out of phase with each other by 90 degrees, the belt in which the intermediate roller is twisted is twisted by 45 degrees with respect to a horizontal line, and The tail rotor drive device for a helicopter toy according to claim 1, wherein the tail rotor drive device is attached at an angle of 45 degrees with respect to the horizontal line. 4. The intermediate roller is constituted by a ring body fitted in the tail pipe and a roller rotatably supported by the ring body. Tail rotor drive for helicopter toys from Japan.