Tilting propeller device of helicopter

Abstract

The invention discloses a tilting propeller device of a helicopter, belongs to the technical field of helicopter instrument production, and aims to solve the technical problem of how to provide a propeller device which is not provided with a hinge structure and can generate lift force and thrust force for the helicopter. According to the technical scheme, a long shaft and a short shaft are installed at the two ends of a framework of a cross-shaped annular track and on the outer side of the track respectively, a large gear and a bearing are installed on the long shaft, a bearing is installed on the short shaft, and a small gear of a tilting motor is meshed with the large gear to control tilting of the annular track. The motor is mounted above the center of the cross-shaped annular track and at the lower end of the transmission shaft and below the track, the turntable is provided with a plurality of paddles and rollers, and the rollers are in contact with the lower part of the annular track; lift force is generated when the blades rotate, the lift force is transmitted to the helicopter body through the idler wheels, the annular track and the supporting frame to provide lift force for the helicopter, and forward thrust can be generated when the propellers tilt. The propeller device is suitable for helicopters and vertical take-off and landing unmanned aerial vehicles.

Description

1. Technical Field

[0001] The device belongs to the technical field of helicopter equipment production. 2. Background Technology

[0002] A ceiling fan is an electrical appliance for people to cool down. It is usually hung on the roof of a house. It consists of a fixed base, an intermediate frame, a motor, multiple fan blades, a voltage regulator, wires, etc. The fan blades are installed under the motor housing and are bent horizontally downward at a certain angle in the same direction. When the voltage regulator is turned on, the fan rotates counterclockwise to generate downward wind force, bringing cool breeze to people. The voltage regulator can control the rotation speed of the fan, and the air volume can be large or small. An oscillating fan is also a tool for people to cool down. It can shake its head left and right to blow air in the left and right directions. The existing helicopter propeller device has the blades on the top and the engine on the bottom. A hinge structure is used to control the horizontal downward deflection angle of the blades to increase or decrease lift. III. Summary of the invention

[0003] (I) The technical problem to be solved by the device is: how to provide a propeller device for a helicopter without a hinge structure that can generate both lift and thrust.

[0004] (II) The technical solution adopted is:

[0005] 1. According to the working principle of the ceiling fan, the length of the fan blades is extended, the hanging point is designed on the side, and rollers are installed at the ends of the fan blades. The middle frame becomes a horizontal circular track, and the motor is installed above the center of the circular track. When the motor drives the fan blades to rotate, the rollers roll and rotate along the bottom of the circular track to generate downward wind force, that is, upward lift; according to the working principle of the oscillating fan, another tilting motor drives the entire fan head (propeller device) to raise its head upward or lower its head downward, and the wind direction can be low or high. The device can generate both lift and thrust, and is used as a propeller device for a helicopter or vertical take-off and landing drone.

[0006] 2. The propeller device includes: a cross-circular track, a motor (engine), multiple blades, a turntable, multiple rollers, a motor control switch (engine start switch, throttle), a long shaft, a short shaft, bearings, gears, a tilt motor, supporting facilities, etc.

[0007] 3. The turntable is circular, with a drive shaft mounting hole in the center and multiple blade mounting holes evenly and symmetrically arranged around it. The turntable is installed at the lower end of the motor or engine drive shaft and below the circular track.

[0008] 4. The blade is rectangular, with a petiole and a rotating shaft at both ends of one long side. A mounting hole is drilled on the petiole, and a roller is installed on the rotating shaft at the end of the blade. When the blade petiole is installed on the turntable, the axis of the roller rotating shaft is perpendicular and crosses the axis of the motor drive shaft, and the roller corresponds to and contacts with the bottom of the circular track.

[0009] Relative to the petiole, the blade plane is at an acute angle to the right and below with the petiole plane, which is suitable for devices that rotate counterclockwise. Multiple identical blades can be installed on a turntable. When the motor (engine) drives the blade to rotate counterclockwise, downward wind force is generated, that is, upward lift is generated. The lift generated by the propeller device is related to the bending angle of the blade, the length and width of the blade, the number of blades, the rotation speed of the blade, etc. The larger the length, width, number, and rotation speed of the blade, the greater the lift generated when the blade rotates. The deflection angle between 10° and 30° is more suitable.

[0010] 5. The cross-ring track is in the shape of a ring, with a cross frame in the middle. A transmission shaft hole is drilled in the center of the cross frame. The diameter of the hole is larger than the diameter of the motor or engine transmission shaft to facilitate the passage of the transmission shaft. Motor or engine mounting holes are set on the cross around the transmission shaft hole. The motor or engine is fixed above the center of the ring track, with the transmission shaft facing downward and a turntable installed at the end.

[0011] A short shaft and a long shaft are installed at both ends of a cross frame and outside the track with the same axis. A set of bearings and bearing seats are installed on each shaft, and a large gear is installed on the outer end of the long shaft.

[0012] 6. The tilt motor can be forward or reverse. A small gear is installed on the shaft, meshing with the large gear of the circular track. When the tilt motor rotates, it can drive the cross circular track to tilt forward or backward, thereby driving the entire tilt propeller device to tilt forward or backward 90°. The circular track of the propeller device is in a horizontal state. When the blades rotate, the wind blows downward to generate upward lift; when the propeller device tilts forward from the horizontal 0° to the vertical state 90°, the propeller blows backward and downward, the lift decreases from the maximum to the minimum, and the forward thrust increases from the minimum to the maximum.

[0013] 7. Instructions for use: 1. Install the two sets of bearings and bearing seats of the device symmetrically on the support frames on the left and right sides above the fuselage, and the rotation axes of the two sets of devices coincide. 2. Turn on the tilt motor to make the propeller device horizontal. 3. Turn on the motor control switch (start the engine) to rotate the propeller blades, and the rollers roll and rotate along the bottom of the track. Increase the power (throttle) to increase the lift. The generated lift is transmitted to the fuselage through the rollers, circular tracks, mounting frames, etc., increasing the rotation speed of the blades; when the lift increases to a certain value, it can drive the helicopter to rise off the ground and rise to a certain height; reduce the rotation speed, reduce the lift, and make the helicopter lower its height and land on the ground. 4. Start the tilt motor to tilt the propeller device forward to a certain angle. While generating lift, it also generates a sufficiently large thrust to push the helicopter forward.

[0014] (III) Beneficial effects: 1. The annular track serves as a protective facility for the propeller blades, which reduces the damage to the blades and increases the use space; 2. The propeller device does not use a hinge structure to control the deflection of the blades, and has a simple structure, low cost, and is easier to operate; 3. When the motor drives the blades to rotate, the lift generated is transmitted to the fuselage through rollers, annular tracks, mounting frames, etc., and the bearing capacity of the drive shaft is greatly reduced; 4. The use of the propeller device can not only provide lift for the helicopter, but also provide thrust for the helicopter to fly forward.

[0015] (IV) Scope of application: The propeller device is suitable for helicopters and vertical take-off and landing UAVs, providing a propeller device for helicopters and vertical take-off and landing UAVs that can generate both lift and thrust. IV. Description of the drawings In the figure, the curved arrow represents the direction of rotation of the fan blade or propeller blade, and the vertical arrow represents the direction of wind force.

[0016] Figure 1 Schematic diagram of ceiling fan structure;

[0017] Figure 2 Side view of ceiling fan blades;

[0018] Figure 3 Front view of the turntable;

[0019] Figure 4 Front view of the propeller blade;

[0020] Figure 5 Side view of the lower right bent blade;

[0021] Figure 6 Side view of the motor, transmission shaft, turntable, blades, and roller installation structure;

[0022] Figure 7 Front view of the motor, transmission shaft, turntable, blades, and roller installation structure;

[0023] Figure 8 Side view of the cross-circular track;

[0024] Fig. 9 Front view of the cross-circular track;

[0025] Fig.10 A side view of the installation structure of the device;

[0026] 1. Roof 2. Fixing seat 3. Middle frame 4. Fan blade 5. Motor 6. Fan handle 7. Blade mounting hole 8. Drive shaft mounting hole 9. Turntable 10. Blade handle 11. Shaft 12. Blade 13. Motor (engine) 14. Drive shaft 15. Roller 16. Drive shaft hole 17. Circular track 18. Short shaft 19. Long shaft 20. Cross frame 21. Motor (engine) mounting hole 22. Bearing and bearing seat 23. Large gear V. Specific implementation methods

[0027] 1. Figure 3 The rotating disk (9) is circular, a motor transmission shaft mounting hole (8) is arranged at the center, and four sets of blade mounting holes (7) are symmetrically arranged around the mounting hole.

[0028] 2. Figure 4 The blade (12) is rectangular in shape, with a petiole (10) mounted on one end, a mounting hole being arranged on the petiole, and a shaft (11) being mounted on the other end, and a roller (15) being mounted on the shaft; Figure 5 In the figure, the paddle plane is deflected about 20° to the lower right relative to the petiole plane.

[0029] 3. Fig. 9 In the invention, a cross frame (20) and an annular track (17) form a cross annular track, a transmission shaft hole (17) is punched in the center of the cross of the cross annular track, a motor (engine) mounting hole (21) is arranged on the cross (20) around the transmission shaft hole, a short shaft (18) and a long shaft (19) are installed at both ends of a cross frame and outside the track, the long shaft and the short shaft have the same axis, a set of bearings and a bearing seat (22) are respectively installed on the two shafts, and a large gear (23) is installed on the outer end of the long shaft. The cross annular track can be symmetrically installed on brackets above and on both sides of the fuselage through two bearings and bearing seats.

[0030] 4. Fig.10 In the invention, a motor (engine) is installed above the center of the circular track, and a transmission shaft passes downward through the transmission shaft hole of the cross circular track; a roller (15) is installed on the shaft (11) at the end of the blade, and the blade handles (10) of four sets of blades are installed on a turntable (9). The turntable is installed at the lower end of the transmission shaft from the bottom of the cross circular track, and the roller corresponds to the bottom of the circular track.

[0031] 5. A small gear is installed on the tilt motor shaft and meshes with the large gear (23) of the annular track.

[0032] 6. Install electrical wires, control switches and other supporting facilities.

Claims

1. A tilting propeller device for a helicopter, characterized in that: The motor (engine) drives the turntable, blades, and rollers to rotate counterclockwise, generating lift. The lift is transmitted to the fuselage through the rollers, circular track, and mounting frame, providing lift for the helicopter. When the propeller device tilts, it can generate forward thrust.

2. A helicopter propeller device according to claim 1, characterized in that: The cross-ring track is in the shape of a ring, with a cross frame in the middle. A transmission shaft hole is drilled in the center of the cross frame, and motor or engine mounting holes are set on the cross around the transmission shaft hole; a short shaft and a long shaft are installed at both ends of a cross frame and outside the track with the same axis. A set of bearings and bearing seats are installed on each shaft, and a large gear is installed on the outer end of the long shaft.

3. The helicopter propeller device according to claim 1, characterized in that: The turntable is circular, with a transmission shaft mounting hole in the center and multiple blade mounting holes evenly and symmetrically arranged around it.

4. A helicopter propeller device according to claim 1, characterized in that: The blade is rectangular, with a petiole and a rotating shaft at both ends of one long side. A mounting hole is drilled on the petiole, and a roller is installed on the shaft at the end of the blade. Relative to the petiole, the blade plane forms an acute angle with the petiole plane to the lower right, which is suitable for devices rotating counterclockwise. The petioles of multiple blades are installed on a turntable.

5. The helicopter propeller device according to claim 1, characterized in that: The motor is installed above the center of the circular track, the turntable is installed at the lower end of the motor (engine) transmission shaft and below the circular track, and the roller corresponds to and contacts the bottom of the circular track.

6. A helicopter propeller device according to claim 1, characterized in that: The small gear of the tilt motor meshes with the large gear of the circular track to control the tilt direction of the propeller.

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