KR20160120384A - Gear device for unmanned vehicle - Google Patents

Gear device for unmanned vehicle Download PDF

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Publication number
KR20160120384A
KR20160120384A KR1020150049053A KR20150049053A KR20160120384A KR 20160120384 A KR20160120384 A KR 20160120384A KR 1020150049053 A KR1020150049053 A KR 1020150049053A KR 20150049053 A KR20150049053 A KR 20150049053A KR 20160120384 A KR20160120384 A KR 20160120384A
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KR
South Korea
Prior art keywords
gear
belt
gears
main
rotatable
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KR1020150049053A
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Korean (ko)
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KR101687314B1 (en
Inventor
양정환
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만진항공건설 주식회사
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Priority to KR1020150049053A priority Critical patent/KR101687314B1/en
Publication of KR20160120384A publication Critical patent/KR20160120384A/en
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Publication of KR101687314B1 publication Critical patent/KR101687314B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D35/00—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
    • B64D35/04—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/04—Helicopters
    • B64C27/08—Helicopters with two or more rotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C39/00—Aircraft not otherwise provided for
    • B64C39/02—Aircraft not otherwise provided for characterised by special use
    • B64C39/024—Aircraft not otherwise provided for characterised by special use of the remote controlled vehicle type, i.e. RPV
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/12—Differential gearings without gears having orbital motion
    • F16H48/19—Differential gearings without gears having orbital motion consisting of two linked clutches
    • B64C2201/024—
    • B64C2700/6294—

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear Transmission (AREA)

Abstract

The present invention relates to a gear device for an unmanned air vehicle, which can easily control a rotation direction of a propeller of an unmanned air vehicle and transmit an accurate rotation number and power. The gear device for an unmanned air vehicle comprises: multiple fixing shafts connecting and supporting an upper board and a lower board; a fixing bracket installed between the upper board and the lower board and supported by the fixing shaft; a clutch mounted on the fixing bracket and rotating using the power transmitted from an engine; a rotatable dual gear connected to the clutch; a rotatable belt gear connected to the dual gear by a belt; a rotatable main gear located in the upper part of the belt gear; multiple shafts inserted and mounted to the belt gear and the main gear to rotate; and a rotatable power transmission gear installed between the fixing bracket and the lower board and transmitting the power as the shaft is inserted into and mounted onto the power transmission gear to rotate.

Description

[0001] Gear device for unmanned vehicle [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear device for an unmanned aerial vehicle which can more easily control the direction of rotation of a propeller of an unmanned aerial vehicle.

Many unmanned aerial vehicles are being researched and developed in modern times and are being operated in various industries. Unmanned aerial vehicles (UAVs) and unmanned aerial vehicles (UAVs) have a wide range of applications in the aviation industry. They are also used in conventional unmanned reconnaissance aircraft and unmanned fighter planes for disaster monitoring, relief, meteorological observation, Aerial photography, entertainment, and the like, and is expanding to include more fields.

In the case of a multi-copter equipped with a multi-rotor among commercialized unmanned aerial vehicles, in particular, an even number of propellers are constructed using a plurality of motors. In accordance with the number of propellers, half is rotated in the forward direction and the other half is rotated in the reverse direction A driving system using a structure for canceling a rotational reaction force or a driving system using an engine equipped with gears on a multi-copter body is used.

When the propeller is rotated using a plurality of conventional motors, it is necessary to control the direction of rotation by changing the electrodes of the respective motors. Since the battery is used, there is a disadvantage in that the flight time is short due to the limitation of the amount of electric power. The engine must be used in the reverse direction, which may cause the engine to be overloaded and cause defects.

Korean Patent No. 0812755 (Mar. 08, 2008) uses a method of driving a bevel gear mounted on a conventional multi-copter body. In such a case, since it is necessary to use an iron gear, the weight is increased, There is a problem that can not be installed. In addition, since the rotation force generated in the body of the multi-copter rotates in the same direction, a portion of the rotor connected to the body has a somewhat complicated configuration to have an opposite rotation direction. By using the engine, There is no device where there is no gear, so that wear and noise of the gear are severely caused by the vibration, and the power shaft connected to the gear is distorted.

KR registration 0812755 (2008.03.05)

SUMMARY OF THE INVENTION The present invention is conceived to solve the problems of the prior art as described above, and provides a gear device for an unmanned aerial vehicle that can easily control a rotating direction of a propeller of a manned non- There is a purpose.

In order to achieve the above-mentioned object, A stationary bracket provided between the upper plate and the lower plate and supported by the stationary shaft; A clutch mounted on the stationary bracket and rotatable using power transmitted from the engine; A double gear rotatable in association with the clutch; A rotatable belt gear connected to the double gear by a belt; A main gear rotatable on an upper portion of the belt gear; A plurality of shafts rotatably inserted into the belt gear and the main gear; A rotatable power transmission gear provided between the stationary bracket and the lower plate and rotatably inserted in the shaft to transmit power; The present invention provides a gear device for an unmanned aerial vehicle.

According to the present invention, the rotation direction of a plurality of propellers can be more easily controlled by using one engine, a noise can be prevented by mounting gears in a vertical dustproof structure using a rotatable shaft, It is possible to facilitate the driving of the multi-copter by precisely controlling the number of revolutions and the power transmission, thereby simplifying the maintenance and simplifying the flying body. Can be produced.

1 is an exploded perspective view of a gear device for an unmanned aerial vehicle according to an embodiment of the present invention.
2 is a plan view of a gear unit for an unmanned aerial vehicle according to an embodiment of the present invention.
3 is a side view of a gear unit for an unmanned aerial vehicle according to an embodiment of the present invention.
4 is a side perspective view of a gear unit for an unmanned aerial vehicle according to an embodiment of the present invention.
FIG. 5 is an explanatory view of a gear device for an unmanned aerial vehicle according to an embodiment of the present invention.

The present invention relates to a gear device for an unmanned aerial vehicle, comprising: a plurality of fixed shafts for connecting and supporting an upper plate and a lower plate; A stationary bracket provided between the upper plate and the lower plate and supported by the stationary shaft; A clutch mounted on the stationary bracket and rotatable using power transmitted from the engine; A double gear rotatable in association with the clutch; A rotatable belt gear connected to the double gear by a belt; A main gear rotatable on an upper portion of the belt gear; A plurality of shafts rotatably inserted into the belt gear and the main gear; A rotatable power transmission gear provided between the stationary bracket and the lower plate and rotatably inserted in the shaft to transmit power; The present invention provides a gear device for an unmanned aerial vehicle.

In addition, the double gear is composed of an upper gear and a lower gear, and the upper gear and the lower gear are linearly connected to each other. The belt gear is disposed to face diagonally with respect to the double gear, Wherein the first belt gear is rotatably connected to the upper gear by the belt and the second belt gear is rotatably connected to the upper gear by the belt, And can be rotatably driven. In addition, the first belt gear and the second belt gear can rotate in the same rotational direction.

The main gear is constituted by first to fourth main gears of the same size and is disposed at a center of each of the first to fourth main gears at intervals of 90 degrees with respect to a virtual straight line, And the pair of gears formed at positions facing each other in the diagonal direction have a pair of opposite rotation directions. That is, the gears formed at the positions facing each other rotate in the same direction.

The main gear is composed of first to sixth main gears of the same size. When the whole of the first to sixth main gears is viewed as a center point at the center of the first to sixth main gears, the interval between the center points of the gears is 60 And the adjacent gears can rotate in mutually opposite rotational directions.

The main gear is composed of first to eighth main gears of the same size. When the whole of the first to eighth main gears is viewed as a center point at the center of the first to eighth main gears, the interval between the center points of the gears is 45 And the pair of gears formed at positions opposed to each other in the diagonal direction are rotatable in opposite rotational directions.

The plurality of shafts may include first to fourth shafts and a center shaft, and the power transmission gear may include first to fourth power transmission gears.

Also, the first to fourth shafts may be equally spaced from each other.

Also, the power generated from the clutch is transmitted to the double gear and the belt gear provided on the upper portion of the clutch and is transmitted to the shaft rotatably inserted in the belt gear, the main gear, and the power transmission gear, It is possible to drive the rotor by transmitting power to the gear.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, It should be understood that various modifications may be made.

FIG. 1 is an exploded perspective view of a gear unit for an unmanned aerial vehicle according to an embodiment of the present invention, FIG. 2 is a plan view of a gear unit for an unmanned aerial vehicle according to an embodiment of the present invention, and FIG. FIG. 4 is a side perspective view showing a gear device for an unmanned aerial vehicle according to an embodiment of the present invention. FIG. 4 is a side view illustrating a gear device for an unmanned aerial vehicle according to an embodiment of the present invention. Hereinafter, the gear unit for an unmanned aerial vehicle according to the present invention will be described in detail with reference to Figs. 1 to 4 and one embodiment.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear device for an unmanned aerial vehicle, and more particularly, to a gear device mounted on a multi-rotor or multi-copter equipped with a plurality of propellers, And to a gear device (100) for a unmanned aerial vehicle capable of transmitting power.

Throughout this specification, the term 'unmanned aerial vehicle' refers to an aeronautical vehicle capable of being remotely controlled without a person on board.

1 to 4, the gear unit 100 for an unmanned aerial vehicle according to the present invention includes upper and lower plates 11 and 12 for supporting the gear unit, a plurality of fixed shafts 13 for connecting and supporting the upper and lower plates 11 and 12, And a fixing bracket (14) supported by the fixing shaft and positioned between the upper and lower plates (11, 12). More specifically, the fixing shaft 13 can be inserted and fixedly supported in the first through hole 15 provided at the edges of the upper plate 11, the lower plate 12 and the fixing bracket 14.

A portion 18 to which a boom, a rotor, and components necessary for the boom, a rotor, and the like can be mounted is provided at an edge of the fixing bracket 14 and the lower plate 12. For example, a through hole is provided for mounting a boom The boom can be fixed using fixing means such as screws and nuts.

In addition, it is preferable that the first through holes 15 are provided in the upper plate 11, the lower plate 12, and the fixing bracket 14, respectively, but the present invention is not limited thereto. It is preferable that four of the fixing shafts 13 be inserted into the first through holes 15 like the first through holes 15. However, the present invention is not limited thereto, And can be changed depending on the number of the through holes 15. The upper plate 11, the lower plate 12, the fixing bracket 14 and the fixing shaft 13 may be made of carbon fiber (carbon), an aluminum alloy, a titanium alloy, and a fiber reinforced plastic.

The rotatable clutch 20 of the present invention is fixed to the stationary bracket 14 and can transmit the power transmitted from the engine to the double gear 30 coupled with the clutch 20 to rotate. Here, the clutch 20 may be a clutch bell or a centrifugal clutch. More specifically, the double gear 30 is composed of an upper gear 31 and a lower gear 32, and the upper gear 31 and the lower gear 32 are arranged in a straight line. Here, the double gear 30 may be a timing belt gear.

The belt gear 40 disposed opposite to each other in the diagonal direction about the double gear 30 may be composed of a first belt gear 41, a second belt gear 42 and a rotatable belt 43 have. More specifically, the first belt gear is rotatably connected to the upper gear 31 by the belt 43, and the second belt gear 42 is connected to the lower gear 32 and the belt 43 And is rotatable. The first belt gear 41 and the upper gear 31 may be disposed parallel to each other and the second belt gear 42 and the lower gear 32 may be disposed parallel to each other But is not limited thereto. The double gear 30 is rotated by the power transmitted from the clutch 20 to the belt gear 40 so that the double gear 30 is rotatable. The first belt gear 41 and the second belt gear 42 connected by the belt 43 can rotate in the same direction. Here, the belt gear 40 may be a timing belt gear.

Further, the first belt gear and the second belt gear, which are positioned at the upper and lower portions and are provided diagonally, can cancel the tension caused by the rotation of the belt 43.

For example, the double gear 30 and the belt gear 40 use a timing belt gear, thereby vibrating the engine when the air vehicle is driven, so as to buffer the vibration transmitted to the power shaft It is possible to prevent the axis from being twisted.

The main gear 50 of the present invention may be constituted by a first main gear 51, a second main gear 52, a third main gear 53 and a fourth main gear 54 of the same size. The main gears 50 are meshed with each other at an angle of 90 degrees with respect to a virtual straight line that meshes with the center of the first through fourth main gears 51, 52, 53, And the pair of gears formed at positions facing each other in the diagonal direction can be rotated in opposite directions. For example, the first main gear 51 and the third main gear 53 are paired, the second main gear 52 and the fourth main gear 54 are paired and the first and third main gears 51 And 53 are rotated in the counterclockwise direction, the second and fourth main gears 52 and 54 engaged with the first and second main gears 52 and 54 rotate clockwise. That is, the first and third main gears 51 and 53 rotate in the same direction, and similarly, the second and fourth main gears 52 and 54 rotate in the same direction. Here, the main gear 50 may be a spur gear or a helical gear.

Therefore, since the rotational force generated from the main gear 50 is generated in both the forward direction and the reverse direction, a separate device for rotating in the opposite direction is not needed in order to cancel the rotational reaction force to the rotor portion connected thereto, Can be produced.

In addition, the main gear 50 can be driven with different sizes as required, and the number of the main gears 50 can be additionally driven. That is, although the number of the first to fourth gears is four, it is most preferable that the number of the gears is four, but the present invention is not limited thereto. For example, two or four gears may be added to the main gear 54 to drive six or eight main gears.

As shown in FIGS. 5A, 5B, and 5C, the number of the main gears 54 can be four, six, or eight, and can be engaged with each other and driven.

The upper and lower plates 11 and 12 and the fixing bracket 14 are provided with a plurality of shafts 60 rotatably inserted into the belt gear 40, the main gear 50, and the power transmission gear 70, And the second through holes 16 may be provided. However, the present invention is not limited thereto. The plurality of shafts 60 may include five first shafts 61, second shafts 62, third shafts 63, fourth shafts 64, and a center shaft 65 But is not limited thereto. The upper plate 11 further includes a third through hole 17 so that a center shaft (not shown) for fixing and supporting the double gear 30 connected to the clutch 20 can be rotatably inserted and mounted .

The power transmission gear 70 is provided between the fixing bracket 14 and the lower plate 12 and as described above, the shaft 60 is rotatably inserted and mounted, Can occur. More specifically, the power transmission gear 70 includes a first power transmission gear 71, a second power transmission gear 72, a third power transmission gear 73, and a fourth power transmission gear 74 But it is not limited thereto. Here, the power transmission gear 70 may be a timing belt gear or a bevel gear.

The first to fourth shafts 61, 62, 63 and 64 are connected to the first to fourth main gears 51, 52, 53 and 54, the first and second belt gears 41 and 42, And can be rotatably inserted and mounted on the respective central axes of the first to fourth power transmission gears 71, 72, 73, 74.

In addition, the clutch 20 may further include a device for driving or rotating, such as a clutch pad fixing base 21, a clutch bearing 22 for a starting shaft.

In the driving of the gear unit for unmanned aerial vehicle (100), the clutch (20) is rotated by the power transmitted from one engine, and the double gear (30) and the belt gear (40) connected thereto are rotated. At this time, the power generated by the clutch 20 is connected to the double gear 30 and the belt gear 40 to obtain a reduction gear ratio. Here, the reduction ratio may be 1: 1.5 to 3: 1, preferably 2: 1, but is not limited thereto.

The first belt gear 41 is connected to the first main gear 51 by the first shaft 61 and the second belt gear 42 is connected to the third shaft 63 by the first shaft 61, And is connected to the third main gear 53 to transmit rotational force. That is, the first shaft 61 and the third shaft 63 connected to the belt gear 40, which receives the power, are connected to the first and third main gears 51 and 53, And the second and fourth main gears 52 and 54, which receive the rotational force by being engaged with the first and third main gears, rotate. The rotational force generated by the rotation of the second and fourth main gears 52 and 54 is transmitted to the second and fourth shafts 62 and 64 rotatably inserted therein and is transmitted to the second and fourth shafts 62 and 64 to transmit power to a rotor device connected to the power transmission gear 70 so that the propeller can be rotated. Here, when the first and third shafts 61 and 63 are rotated in the counterclockwise direction, the second shaft and the fourth shaft 62 and 64 rotate in the counterclockwise direction. Accordingly, the rotational force transmitted in opposite directions gives a rotational direction of the propeller connected to the rotor device different from each other, so that the rotational direction can be more easily controlled, and the four main gears 50) can improve the flying efficiency of the unmanned aerial vehicle by transmitting accurate rotation speed and power.

5, the double gear 30, the belt gear 40, the power transmission gear 70, and the shaft (not shown) of the above- 60 can also be varied.

In addition, the clutch 20 according to the present invention not only avoids the danger of safety due to sudden high-speed rotation of the propeller when starting the unmanned aerial vehicle driven by the engine, The speed of the remaining propeller and the pitch of the propeller can be manipulated to prevent a high speed fall. The clutch 20 can perform a damping function when a load is applied to the engine.

Therefore, the structure of the gear according to the present invention can relieve a phenomenon that the power shaft is twisted by the force of the engine or the like in the clutch 20, and the double gear 30 connected to the clutch 20, The power of the power transmission gear 70 is transmitted to the power transmission gear 70 through the power transmission gear 70, Can be transmitted to the rotor (propeller) with a buffering effect once more so that the belt of the engine can absorb the vibration, thereby reducing noise and vibration of the engine.

In addition, since the present invention can drive an unmanned aerial vehicle using one engine, the flying time is longer than that of the conventional motor, and the flying efficiency is improved because the force to be transmitted to the propeller is stronger. , The motor using the battery must support the same weight until the completion of the flight. However, since the fuel consuming engine continuously consumes the fuel during the flight, the weight supported by the fuel due to the consumption of the fuel decreases, The efficiency can be improved.

100: gear unit for unmanned aerial vehicle
11: top plate 12: bottom plate
13: fixed shaft 14: fixed bracket
20: clutch
21: clutch pad fixing base 22: clutch bearing
30: Double gear
31: upper gear 32: lower gear
40: Belt gear 41: First belt gear
42: second belt gear 43: belt
50: Main gear
51: first main gear 52: second main gear
53: third main gear 54: fourth main gear
60: Shaft
61: first shaft 62: second shaft
63: third shaft 64: fourth shaft
70: Power transmission gear
71: first power transmission gear 72: second power transmission gear
73: third power transmission gear 74: fourth power transmission gear

Claims (9)

A plurality of fixed shafts connecting and supporting the upper and lower plates;
A stationary bracket provided between the upper plate and the lower plate and supported by the stationary shaft;
A clutch mounted on the stationary bracket and rotatable using power transmitted from the engine;
A double gear rotatable in association with the clutch;
A rotatable belt gear connected to the double gear by a belt;
A main gear rotatable on an upper portion of the belt gear;
A plurality of shafts rotatably inserted into the belt gear and the main gear;
A rotatable power transmission gear provided between the stationary bracket and the lower plate and rotatably inserted in the shaft to transmit power;
And a gear unit for an unmanned aerial vehicle.
The method according to claim 1,
Wherein the double gear is composed of an upper gear and a lower gear, the upper gear and the lower gear being linearly connected to each other, and the belt gear is disposed in a first diagonal direction with respect to the double gear, Wherein the first belt gear is rotatably connected to the upper gear by the belt and the second belt gear is rotated by the lower gear and the belt And is rotatable with respect to the unmanned vehicle.
3. The method of claim 2,
Wherein the first belt gear and the second belt gear have the same rotation direction.
The method according to claim 1,
The main gear is constituted by first to fourth main gears of the same size and meshed with each other at an interval of 90 degrees with respect to a virtual straight line in which the main gear meshes with the center of the first to fourth main gears as a center point Wherein the pair of gears are disposed at positions opposite to each other in a diagonal direction so that the pair of gears have opposite rotational directions.
The method according to claim 1,
The main gear is constituted by first to sixth main gears of the same size, and when the whole of the first to sixth main gears is viewed as a central point at the center of the first to sixth main gears, And the gears adjacent to each other have rotational directions opposite to each other.
The method according to claim 1,
The main gear is constituted by first to eighth main gears of the same size, and when the whole of the first to eighth main gears is viewed as a center point at 360 degrees, the interval between the center points of the gears is 45 degrees Wherein the pair of gears are disposed at positions facing each other in a diagonal direction, and the pair of gears have opposite rotational directions.
The method according to claim 1,
Wherein the plurality of shafts comprise first to fourth shafts and a central shaft, and the power transmission gear comprises first to fourth power transmission gears.
8. The method of claim 7,
Wherein the first to fourth shafts have the same distance between the shafts.
The method according to claim 1,
The power generated from the clutch is transmitted to the double gear and the belt gear provided on the upper portion of the clutch and is transmitted to the shaft rotatably inserted into the belt gear, the main gear and the power transmission gear, And the rotor is driven by transmitting power.
KR1020150049053A 2015-04-07 2015-04-07 Gear device for unmanned vehicle KR101687314B1 (en)

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KR101687314B1 KR101687314B1 (en) 2016-12-21

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07205899A (en) * 1994-01-13 1995-08-08 Hitachi Ltd Sealing device for space machine element
KR200365355Y1 (en) * 2004-07-14 2004-10-20 김종열 power transmission for radio control helicopter
US20060192046A1 (en) * 2005-02-25 2006-08-31 The Boeing Company Aircraft capable of vertical and short take-off and landing
KR100812755B1 (en) 2006-11-13 2008-03-12 한국생산기술연구원 Quadro copter
CN104627366A (en) * 2015-02-10 2015-05-20 曹兵 Oil drive variable pitch quadrotor type multifunctional fire-fighting unmanned aerial vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07205899A (en) * 1994-01-13 1995-08-08 Hitachi Ltd Sealing device for space machine element
KR200365355Y1 (en) * 2004-07-14 2004-10-20 김종열 power transmission for radio control helicopter
US20060192046A1 (en) * 2005-02-25 2006-08-31 The Boeing Company Aircraft capable of vertical and short take-off and landing
KR100812755B1 (en) 2006-11-13 2008-03-12 한국생산기술연구원 Quadro copter
CN104627366A (en) * 2015-02-10 2015-05-20 曹兵 Oil drive variable pitch quadrotor type multifunctional fire-fighting unmanned aerial vehicle

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