JPH0725356B2 - Flying body - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flying object that flies by rotation of a rotor blade driven by a driving device.

2. Description of the Related Art For example, a flying object of the above-described type, which is used for shooting a construction site or the like from the sky or for playing like a model airplane, has been conventionally known. However, in this type of conventional flying body, in order to cancel the reaction torque generated by the rotation of the rotor blade, the two sets of rotors are rotated in the opposite directions coaxially or on different shafts, or the reaction torque is separated from the rotor rotation shaft. Although the reaction torque was canceled by providing a rotor blade that acts in the direction of canceling, the structure was very complicated.

Further, there is also known a flying body that is provided with a duct that guides the air flow generated by the rotation of the rotor blades and can suppress the turbulence of the air flow to fly efficiently with less power. Requires a support member for supporting the airflow guide duct, which not only increases the cost, but also complicates the structure of the flying object, increases its weight, and lowers flight efficiency.

OBJECT The object of the present invention is to provide a flying object that eliminates the above-mentioned conventional drawbacks, can obtain stability with a simple structure, and can increase thrust more effectively than before.

In order to achieve the above object, the present invention provides a support portion for supporting a drive device, a plurality of rotor blades fixed to a rotation shaft of the drive device and extending radially from the rotation shaft, and a rotation center of the rotor blade. A ring-shaped airflow guide duct, and a plurality of reaction torques formed in a wing shape for receiving the airflow generated by the rotation of the rotor blades and canceling the reaction torques generated by the rotations of the blades. The reaction torque control plate has a base end portion fixed to the support portion and radially extending from a rotation center region of the rotor blade, and each tip end portion of the control plate to the air flow guide duct. Propose a fixed flying object.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, a drive unit composed of an engine 3 is fixedly supported on a support portion 2 located at the center of a flying body 1, and a rotary shaft 4 of the engine 3 is directed by the engine 3 in a direction of arrow A. A plurality of rotor blades 5 that are rotationally driven are fixed, and each rotor blade 5 extends radially from the rotation shaft 4. Control of starting and stopping the engine 3, or accelerating or decelerating the engine 3 is performed by remote operation by a remote controller (not shown).

A plurality of reaction torque control plates 6, four in the illustrated example, are provided below the rotor blades 5. Each reaction torque control plate 6 has its base end portion fixed to the support portion 2, radially extends outward from the region of the rotation center X of the rotor blade 5, and is positioned at the same angle. The reaction torque control plate 6 is formed in a wing shape as shown in FIG.
Lifting force is generated on the front surface 6a side of the rotor blade 5 in the rotation direction A.

An airflow guide duct is arranged in a ring shape around the rotation center X of the rotor blade 5, and each reaction torque control plate 6 is provided.
Has its tip fixed to the air flow guide duct 7. That is, the center of the duct 7 coincides with the rotation center X of the rotor blade 5, and the reaction torque control plate 6 and the rotor blade 5 are located inside the air flow guide duct 7.

When the flying object 1 is used for the purpose of photographing from above, the camera 8 is fixed to the lower end of the supporting portion 2 with the lens facing downward.

When the engine 3 is started and the rotor blades 5 are driven in the direction of arrow A, thrust is generated in the flying body 1 in the upward direction B by the same principle as that of the helicopter. As a result, the flying body 1 can fly upward, but at that time, the rotation of the rotor blade 5 causes the flying body 1 to rotate in the direction opposite to the rotation direction A, that is, the arrow C.
Reaction torque is generated in the direction indicated by. This reaction torque is canceled by the reaction torque control plate 6 as follows.

That is, when the rotor blades 5 rotate, an air flow indicated by an arrow D is generated from top to bottom, and this air flow passes by the side of each surface 6a, 6b of each reaction torque control plate 6. At this time, since each control plate 6 has a blade shape, the pressure on the surface of one surface 6a becomes lower than the pressure on the surface of the other surface 6b. Therefore, a lift force F in the direction opposite to the direction C in which the reaction torque acts is applied to each control plate 6, and the lift force F and the reaction torque are just balanced. Therefore, the reaction torque is canceled by the lift force F, and the flying body 1 can rise in a stable state. As described above, the reaction torque control plate 6 receives the airflow generated by the rotation of the rotor blade 5 and cancels the reaction torque generated by the rotation of the blade 5. In this case, since the reaction torque control plates 6 extend radially from the center X of the projectile and are positioned at the same angle, the lift F generated on the control plate 6 acts uniformly in the circumferential direction of the projectile 1. However, the force that causes the flying object to drift laterally does not occur. Therefore, the flying object 1 can fly while maintaining a stable state.

Further, since the air flow D generated by the rotor blades 5 is guided from the top to the bottom by the air flow guide duct 7, the turbulence of the flow is suppressed. For this reason, thrust is effectively generated in the flying body 1, and the flying body 1 can be efficiently flown with a small amount of power.

According to the above configuration, the reaction torque control plate 6 is arranged inside the air flow guide duct 7, so that the entire structure thereof can be simplified. Moreover, since the reaction torque control plate 6 also serves as a connecting member for connecting the airflow guide duct 7 to the support portion 2 to support it, a dedicated support member for the airflow guide duct 7 is not required, and the structure of the flying body is improved. It can be more simplified, its overall weight can be reduced, and flight efficiency can be improved.

Further, in the illustrated embodiment, as is apparent from FIG. 2, the upper end edge portion 7a of the air flow guide duct 7 is smoothly curved toward the outside in the direction away from the rotation center X of the rotor blade 5. The airflow flowing along the edge 7a is oriented in a substantially horizontal direction. Therefore, the negative pressure generated on the upper surface of the edge portion 7a by this air flow causes the thrust E to raise the flying body 1.
This thrust assists the thrust generated by the rotation of the rotor blade 5, and the flight efficiency of the flying vehicle 1 is further enhanced. Further, since the rotating rotor blade 5 is surrounded by the airflow guide duct 7, the blade 5 does not come into direct contact with other objects, and the safety of the flying body during flight is enhanced.

For example, a stabilizer (not shown) can be used to steer the flying vehicle in the front-rear direction, and the thrust can be increased or decreased by rotating the rotor blade 5 in the direction of arrow Z (see FIG. 1). The angle can be changed or the number of rotations of the rotor blade 5 by the engine 3 can be increased or decreased as appropriate, but these configurations are known per se and are not directly related to the present invention. Is omitted.

Although the construction site or the like can be photographed from above by the camera 8 attached to the flying object 1, it is needless to say that the flying object can be used for an appropriate purpose other than photographing.

Effect According to the present invention, in order to cancel the reaction torque and stabilize the flight of the flying object, a wing-shaped reaction torque control plate radially extending from the central support portion is used, so that the entire structure can be simplified. Also, since the air flow guide duct is fixedly supported by the reaction torque control plate on the central support portion, a dedicated support member for this duct is not required, further simplifying the structure and reducing the weight. It can be achieved and flight efficiency can be improved without any hindrance.

[Brief description of drawings]

FIG. 1 is a perspective view showing a flying object according to the present invention with a part of an air flow guide duct cut away, and FIG. 2 is a II- of FIG.
A sectional view taken along line II and FIG. 3 are sectional views taken along line III-III in FIG. 1 ... Flying object, 2 ... Supporting part, 4 ... Rotating shaft, 5 ... Rotor blade, 6 ... Reaction torque control plate, 7 ... Airflow guide duct, 7a ... Upper edge D ... Airflow, X ……Rotation center

Claims (2)

[Claims] 1. A support portion for supporting a drive device, a plurality of rotor blades fixed to a rotary shaft of the drive device and extending radially from the rotary shaft, and arranged in a ring shape around a rotation center of the rotor blade. An air flow guide duct, and a plurality of reaction torque control plates formed in a wing shape for receiving an air flow generated by the rotation of the rotor blade and canceling a reaction torque generated by the rotation of the blade. The recoil torque control plate has a base end portion fixed to the support portion, extends radially from a rotation center region of the rotor blade, and a tip end portion thereof is fixed to the air flow guide duct. . 2. The flying body according to claim 1, wherein an upper end edge portion of the air flow guide duct is curved toward the outside in a direction away from the center of rotation of the rotor blade.