JP2020001464A - Propeller, motor component and flying body including the same - Google Patents

Abstract

A rotorcraft capable of improving flight efficiency is provided. A propeller (2) has at least one fixed pitch blade (20) and at least one variable pitch blade (30). The motor component 1 further comprises a motor 10 for rotating the propeller. The aircraft includes the motor component, a frame that supports the motor component, and a control unit that controls the motor component. Such a configuration can improve the flight efficiency of the aircraft. [Selection drawing] Fig. 1

Description

  The present invention relates to a propeller, a motor component, and a flying object equipped with the same.

  2. Description of the Related Art In recent years, various services using a rotary wing machine (hereinafter, simply referred to as “rotor wing aircraft”) such as a drone and an unmanned aerial vehicle (UAV) used for various applications have been provided. ing. Many propellers of such rotary wing aircraft adopt a fixed pitch propeller in order to simplify the mechanism and reduce the cost.

  On the other hand, Patent Literature 1 provides a flying device capable of stably continuing flight without stopping other thrusters even if an abnormality occurs in any of a plurality of thrusters (for example, see Patent Literature 1).

JP 2018-30568 A

In the flying device of Patent Document 1, the pitch of the propeller is changed by the pitch changing mechanism. In particular, when an abnormality is detected in a thruster among a plurality of thrusters, the attitude control unit of the flying device changes the pitch of the propeller without stopping the normal thruster. As a result, a change in attitude due to torque imbalance is reduced while securing the propulsion necessary for continuation of flight with a normal thruster.

  However, the variable pitch propeller has a higher failure rate and lower flight efficiency than the fixed pitch propeller due to its complicated mechanism.

  Therefore, an object of the present invention is to provide a propeller capable of improving the flight efficiency and a flying object using the same.

  ADVANTAGE OF THE INVENTION According to this invention, the propeller which can improve a flight efficiency and a flying object using the same can be provided.

  According to the present invention, it is possible to provide a rotary wing aircraft capable of improving flight efficiency.

1 is a top view of a propeller according to the present invention. FIG. 4 is another top view of the propeller according to the present invention. FIG. 6 is still another top view of the propeller according to the present invention. FIG. 6 is still another top view of the propeller according to the present invention. FIG. 2 is a side view of a rotary wing machine equipped with the propeller of FIG. 1. FIG. 6 is a top view of the rotary wing machine of FIG. 5. It is a functional block diagram of a rotary wing machine according to the present invention.

The contents of the embodiment of the present invention will be listed and described. A propeller, a motor component, and a flying body including the same according to an embodiment of the present invention have the following configurations.
[Item 1]
A propeller comprising at least one wing fixed pitch blade and at least one wing variable pitch blade.
[Item 2]
The propeller according to item 1, wherein
The number of the fixed pitch blades and the number of the variable pitch blades are the same,
propeller.
[Item 3]
The propeller according to item 1, wherein
The number of the fixed pitch blades and the number of the variable pitch blades are different,
propeller.
[Item 4]
The propeller according to item 3, wherein
The number of the fixed pitch blades is larger than the number of the variable pitch blades,
propeller.
[Item 5]
The propeller according to item 3, wherein
The number of the fixed pitch blades is smaller than the number of the variable pitch blades,
propeller.
[Item 6]
A motor component comprising: the propeller according to any one of items 1 to 5; and a motor for rotating the propeller.
[Item 7]
A flying object comprising: the motor component according to item 6, a frame supporting the motor component, and a control unit for controlling the motor component.
[Item 8]
Item 7 is a flying object,
The control unit, upon receiving an abnormal signal notifying the variable pitch blade or more, controls the number of rotations of the motor components to compensate for lift,
Flying object.

<Details of Embodiment of the Present Invention>
Hereinafter, a propeller, a motor component, and a flying body including the same according to an embodiment of the present invention will be described with reference to the drawings.

<Details of Embodiment of the Present Invention>
As shown in FIG. 2, the propeller 2 according to the embodiment of the present invention includes at least one wing fixed pitch blade 20 and at least one wing variable pitch blade 30.

The propeller 2 rotates upon receiving an output from the motor 10. The rotation of the propeller 2 generates a propulsive force for the rotary wing machine 200 (see FIGS. 5 and 6) to take off from the starting place, move horizontally, and land at the destination. The propeller 2 can rotate rightward, stop, and rotate leftward.

As shown in FIGS. 2 to 5, the number of blades included in the propeller 2 of the present invention may be any number of two or more (for example, 2, 3, 4, or more blades). The shape of the blades can be any shape, such as a flat shape, a bent shape, a kinked shape, a tapered shape, or a combination thereof.

  In addition, the shape of the blade can be changed (for example, expansion, contraction, folding, bending, and the like). The vanes may be symmetric (having identical upper and lower surfaces) or asymmetric (having different shaped upper and lower surfaces).

  The blades can be formed into a suitable geometry to generate dynamic aerodynamic forces (eg, lift, thrust) as the airfoil, wings, or vanes are moved through the air. The geometry of the blades can be selected as appropriate to optimize the dynamic air characteristics of the blades, such as increasing lift and thrust and reducing drag.

  The motor 10 causes the rotation of the propeller 2 and, for example, the drive unit can include an electric motor or an engine. The blades can be driven by a motor and rotate clockwise and / or counterclockwise about the motor's axis of rotation 12 (eg, the long axis of the motor).

  The blades can all rotate in the same direction, or can rotate independently. Some of the blades rotate in one direction and other blades rotate in the other direction. The blades can all rotate at the same rotation speed, or can rotate at different rotation speeds. The number of rotations can be determined automatically or manually based on the size (eg, size, weight) and control state (speed, moving direction, etc.) of the moving body.

  When only the fixed pitch blades are provided during the flight of the rotary wing machine 200, when the vertical descent occurs when an ascending airflow occurs, the rotation speed of the rotary wing aircraft 200 falls below the minimum number of propeller rotations required to maintain the attitude, and the attitude of the rotary wing aircraft becomes May be disturbed or fall. In Patent Document 1, in order to cope with this, a variable pitch blade is used for the flight of the rotary wing aircraft. When using a variable pitch blade, the failure rate increases and the flight efficiency deteriorates due to the complexity of the structure as compared with the fixed pitch propeller.

  However, in the propeller embodiment of the present embodiment, by providing both the fixed pitch blade 20 and the variable pitch blade 30, flight efficiency can be improved.

  In the blades provided in the propeller 2, the number of the fixed pitch blades 20 and the number of the variable pitch blades 30 may be the same. This is because, even when the size and weight of the fixed pitch blade 20 and the variable pitch blade 30 are significantly different, it is easy to balance the entire motor component 1. Balancing the entire motor component 1 is important for a flying object equipped with the motor component 1 to fly without any inconvenience. In addition, it is possible to prevent vibration during flight and obtain a favorable effect in operation of the flying object. It is possible.

  In the blades provided in the propeller 2, the number of the fixed pitch blades 20 and the number of the variable pitch blades 30 may be different. When the number of the fixed pitch blades 20 is larger than the number of the variable pitch blades 30, the fuel efficiency during flight of the rotary wing aircraft 200 is improved by the fixed pitch blades having high flight efficiency, and the torque imbalance is caused by the variable pitch blades. Therefore, the change in the posture due to this is reduced.

  When the number of the fixed pitch blades 20 is smaller than the number 30 of the variable pitch blades, it is possible to operate assuming a turbulent flow, an updraft, and the like that could not be dealt with only by a propeller having only a conventional variable pitch blade. In addition, reliability when a failure occurs in the variable pitch mechanism such as the pitch control motor 32 and the control 34 is ensured.

  As described above, the propeller 2 only needs to include at least one wing fixed pitch blade 20 and at least one wing variable pitch blade 30. With respect to the number and ratio of the fixed pitch blades 20 and the variable pitch blades 30, and the size and arrangement of the individual blades, optimal ones can be adopted as appropriate according to the desired use or purpose.

  The thrust may be adjusted by changing the diagram of the propeller while using the same motor, or by using the same propeller while distinguishing between a low-output motor and a high-output motor. Further, the pitch of the propeller may be changed, or the number of blades may be changed.

  The rotary wing machine described above has the functional blocks shown in FIG. Note that the functional blocks in FIG. 10 are minimum reference configurations. The flight controller is a so-called processing unit. A processing unit may include one or more processors, such as a programmable processor (eg, a central processing unit (CPU)). The processing unit has a memory (not shown) and can access the memory. The memory stores logic, code, and / or program instructions that the processing unit can execute to perform one or more steps. The memory may include, for example, a detachable medium such as an SD card or a random access memory (RAM) or an external storage device. Data obtained from cameras and sensors may be directly transmitted and stored in the memory. For example, still image / moving image data shot by a camera or the like is recorded in a built-in memory or an external memory.

The processing unit includes a control module configured to control a state of the rotorcraft. For example, the control module 6 degrees of freedom (translation x, y and z, and rotational movement theta _x, theta _y and theta _z) spatial arrangement of the rotary wing aircraft having a velocity, and / or to adjust the acceleration And controls the propulsion mechanism (motor, etc.) of the rotary wing aircraft. The control module can control one or more of the states of the mounting unit and the sensors.

  The processing unit can communicate with a transceiver configured to transmit and / or receive data from one or more external devices (eg, terminals, displays, or other remote controllers). The transceiver can use any suitable communication means, such as a wired or wireless communication. For example, the transmitting and receiving unit uses one or more of a local area network (LAN), a wide area network (WAN), infrared, wireless, WiFi, point-to-point (P2P) network, telecommunication network, cloud communication, and the like. be able to. The transmitting / receiving unit can transmit and / or receive one or more of data obtained by the sensors, processing results generated by the processing unit, predetermined control data, user commands from a terminal or a remote controller, and the like. .

  The sensors according to the present embodiment may include an inertial sensor (acceleration sensor, gyro sensor), a GPS sensor, a proximity sensor (eg, a rider), or a vision / image sensor (eg, a camera).

  The rotary wing machine of the present invention can be expected to be used as a rotary wing machine dedicated to home delivery services and as an industrial rotary wing machine in warehouses and factories. Further, the rotary wing aircraft of the present invention can be used in an airplane-related industry such as a multicopter / drone, and the present invention is also suitably used as a rotary wing aircraft for aerial photography equipped with a camera or the like. In addition, it can be used in various industries such as security, agriculture, and infrastructure monitoring.

  The above-described embodiment is merely an example for facilitating the understanding of the present invention, and is not intended to limit and interpret the present invention. The present invention can be changed and improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Motor part 2 Propeller 10 Motor 12 axis 20 Fixed pitch blade 30 Variable pitch blade 32 Pitch control motor 34 Control rod 100 Main part 120 Arm 200 Rotary wing machine

Claims (8)

  A propeller comprising at least one wing fixed pitch blade and at least one wing variable pitch blade. The propeller according to claim 1, wherein
The number of the fixed pitch blades and the number of the variable pitch blades are the same,
propeller. The propeller according to claim 1, wherein
The number of the fixed pitch blades and the number of the variable pitch blades are different,
propeller. The propeller according to claim 3, wherein
The number of the fixed pitch blades is larger than the number of the variable pitch blades,
propeller. The propeller according to claim 3, wherein
The number of the fixed pitch blades is smaller than the number of the variable pitch blades,
propeller.   A motor component comprising: the propeller according to claim 1; and a motor for rotating the propeller.   A flying object comprising the motor component according to claim 6, a frame supporting the motor component, and a control unit for controlling the motor component. The flying object according to claim 7, wherein
The control unit, upon receiving an abnormality signal notifying the abnormality of the variable pitch blade, controls the number of rotations of parts of the motor to compensate for lift,
Flying object.

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