Tilting variable-pitch mechanism for rotorcraft

Abstract

The utility model relates to the field of unmanned aerial vehicles, and discloses a tilting variable-pitch mechanism for a rotorcraft, which comprises a support frame, a steering assembly is arranged on the inner wall of the support frame, the steering assembly comprises a transmission sleeve, the transmission sleeve is rotatably connected to the inner wall of the support frame, a transmission rod is inserted into the inner wall of the transmission sleeve, and the inner wall of the transmission rod is provided with a rotating shaft. The outer wall of the transmission rod is rotationally connected with a supporting wing, the left end of the supporting wing is rotationally connected with a mounting plate, the left end of the transmission rod is fixedly connected with a driving wheel, the left end of the mounting plate is fixedly connected with a driven wheel, the driving wheel and the driven wheel are meshed with each other, and the left end of the mounting plate is fixedly connected with a fixing sleeve. And fan blades are mounted on the inner wall of the fixing sleeve. The driving wheel can be driven to rotate by starting the steering motor, the steering wheel can be driven to rotate by rotating the driving wheel, the transmission sleeve can be driven to rotate by rotating the steering wheel, and the transmission rod can be driven to rotate by rotating the transmission sleeve, so that the two groups of driving wheels can be driven to rotate synchronously.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicles (UAVs), and in particular to a tilt-to-pitch mechanism for rotorcraft. Background Technology

[0002] A gyroplane is a new type of aircraft that combines the features of a fixed-wing aircraft and a helicopter, possessing some of the advantages of both. It holds a unique position in the aviation field, as it can take off and land in confined spaces such as between high-rise buildings in cities and in mountainous areas, providing convenience for rescue, transportation and other missions.

[0003] When a rotorcraft blade swings, it usually relies on a motor installed inside the blade to achieve the swing. By adjusting the motor on the corresponding side, the blade on that side can be rotated to the corresponding state. However, since the flight attitude of the entire aircraft is controlled by two sets of motors, when there is a delay in the rotation of the two sets of motors, it will cause the rotorcraft to tilt, which poses a safety risk. To address this issue, a tilt pitch mechanism for rotorcraft is proposed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a tilting pitch mechanism for rotorcraft, which aims to solve the problem in the prior art that "since the rotation of the two sets of rotor blades is controlled by a separate set of motors, there is a risk of tilting".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tilt-pitch mechanism for a rotorcraft, comprising a support frame, a steering assembly provided on the inner wall of the support frame, the steering assembly including a transmission sleeve, the transmission sleeve being rotatably connected to the inner wall of the support frame, a transmission rod inserted into the inner wall of the transmission sleeve, a support wing rotatably connected to the outer wall of the transmission rod, a mounting plate rotatably connected to the left end of the support wing, a drive wheel fixedly connected to the left end of the transmission rod, a driven wheel fixedly connected to the left end of the mounting plate, the drive wheel and the driven wheel meshing with each other, a fixing sleeve fixedly connected to the left end of the mounting plate, a fan blade installed on the inner wall of the fixing sleeve, a steering wheel fixedly connected to the outer wall of the transmission sleeve, a steering motor installed on the inner wall of the support frame, a drive wheel fixedly connected to the right end of the output shaft of the steering motor, the drive wheel and the steering wheel meshing with each other, and an extension mechanism provided on the inner wall of the support frame.

[0006] As a further description of the above technical solution:

[0007] The extension mechanism includes a synchronization component and a drive component. The synchronization component includes a transmission frame, which is fixedly connected to the outer wall of the transmission rod.

[0008] As a further description of the above technical solution:

[0009] The inner wall of the support frame is fixedly connected to a support rod, the outer wall of the support rod is rotatably connected to a transmission plate, the upper surface of the transmission plate is rotatably connected to a hinge rod, and the left end of the hinge rod is rotatably connected to the upper surface of the transmission frame.

[0010] As a further description of the above technical solution:

[0011] The hinge rods are provided in multiple sets, and the multiple sets of hinge rods are arranged in a rotating array with the center line of the transmission plate as the rotation axis.

[0012] As a further description of the above technical solution:

[0013] The drive assembly includes an electric telescopic rod, which is mounted on the upper surface of the support rod, and the output end of the electric telescopic rod is fixedly connected to one end of the transmission frame near the electric telescopic rod.

[0014] As a further description of the above technical solution:

[0015] The outer wall of the transmission rod is provided with a keyway, and the inner wall of the transmission sleeve is provided with a spline.

[0016] As a further description of the above technical solution:

[0017] Both the driving wheel and the driven wheel are configured as half gears.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, starting the steering motor can drive the drive wheel to rotate, the drive wheel to rotate, the steering wheel to rotate, the steering wheel to rotate, the transmission sleeve to rotate, the transmission sleeve to rotate, and the transmission rod to rotate. In this way, the two sets of driving wheels can rotate synchronously, the driving wheels to rotate, and the driven wheels to rotate. This can drive the fan to turn. The two sets of fans are controlled by the same steering motor, which can reduce the risk of tilting.

[0020] 2. In this utility model, by setting a synchronization component, when one set of transmission rods moves left or right, it will drive the connected hinge rod to rotate through the transmission frame set on its outer wall. In this way, the other set of transmission rods can be driven to move in the opposite direction. This setting can keep the two sets of support wings moving synchronously and ensure the stability of the overall device during flight. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the steering component in this utility model;

[0023] Figure 3This is a three-dimensional structural diagram of the extension mechanism in this utility model;

[0024] Figure 4 This is a three-dimensional structural disassembly diagram of the transmission rod and transmission sleeve in this utility model.

[0025] Legend:

[0026] 1. Support frame; 2. Support wing; 3. Mounting plate; 4. Fixing sleeve; 5. Fan blade; 6. Steering assembly; 61. Transmission rod; 62. Drive wheel; 63. Driven wheel; 64. Steering motor; 65. Drive wheel; 66. Steering wheel; 67. Transmission sleeve; 68. Keyway; 7. Extension mechanism; 71. Synchronization assembly; 711. Support rod; 712. Transmission plate; 713. Transmission frame; 714. Hinge rod; 72. Drive assembly; 721. Electric telescopic rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figure 1 - Figure 3This utility model provides an embodiment of a tilt-pitch mechanism for a rotorcraft, including a support frame 1 for supporting a steering assembly 6. The inner wall of the support frame 1 is provided with a steering assembly 6 for controlling the direction of the fan blades 5. The steering assembly 6 includes a transmission sleeve 67 for transmitting motion. The transmission sleeve 67 is rotatably connected to the inner wall of the support frame 1. A transmission rod 61 for driving a drive wheel 62 to rotate is inserted into the inner wall of the transmission sleeve 67. A support wing 2 for supporting a mounting plate 3 is rotatably connected to the outer wall of the transmission rod 61. The left end of the support wing 2 is rotatably connected to a mounting plate 3 for supporting a fixed sleeve 4. The left end of the transmission rod 61 is fixedly connected to a drive wheel 62 for driving a driven wheel 63 to rotate. The left end of the mounting plate 3 is fixedly connected to a driven wheel 63. The drive wheel 62 and the driven wheel 63 mesh with each other. Since the driven wheel 63 is fixedly connected to the mounting plate 3, and... The passive wheel 63 and the active wheel 62 mesh with each other, so when the active wheel 62 rotates, the mounting plate 3 will rotate in the opposite direction. The left end of the mounting plate 3 is fixedly connected to a fixed sleeve 4 for supporting the fan blade 5. The inner wall of the fixed sleeve 4 is equipped with the fan blade 5 for providing power to the rotorcraft. The outer wall of the transmission sleeve 67 is fixedly connected to a steering wheel 66 for driving the transmission sleeve 67 to rotate. The inner wall of the support frame 1 is equipped with a steering motor 64 for providing power. The right end of the output shaft of the steering motor 64 is fixedly connected to a drive wheel 65 for transmitting power. The drive wheel 65 and the steering wheel 66 mesh with each other. Starting the steering motor 64 will drive the drive wheel 65 to rotate. The rotation of the drive wheel 65 will drive the steering wheel 66 to rotate, thus driving the transmission sleeve 67 to rotate. The inner wall of the support frame 1 is provided with an extension mechanism 7 for controlling the outward lateral movement of the support wing 2.

[0029] Reference Figure 1 - Figure 3 The extension mechanism 7 includes a synchronization component 71 for transmitting motion and a drive component 72 for providing power for the lateral movement of the support wing 2. The synchronization component 71 includes a transmission frame 713 for driving the transmission rod 61 to move. The transmission frame 713 is fixedly connected to the outer wall of the transmission rod 61. When the transmission frame 713 moves left or right, the corresponding transmission rod 61 will also be driven to move synchronously. The inner wall of the support frame 1 is fixedly connected to the support rod 711. The outer wall of the support rod 711 is rotatably connected to a transmission plate 712 for driving the hinge rod 714 to move. The upper surface of 712 is rotatably connected to a hinge rod 714 for pushing the transmission plate 712 to rotate. The left end of the hinge rod 714 is rotatably connected to the upper surface of the transmission frame 713. Multiple sets of hinge rods 714 are arranged in a rotating array around the center line of the transmission plate 712. When one set of transmission frames 713 moves left or right, it will push the transmission plate 712 to rotate by pressing the hinge rod 714. The rotation of the transmission plate 712 will drive another set of hinge rods 714 to rotate, thus pushing the other set of transmission frames 713 to move.

[0030] Reference Figure 2 - Figure 4 The drive assembly 72 includes an electric telescopic rod 721 for providing power for the movement of the transmission frame 713. The electric telescopic rod 721 is mounted on the upper surface of the support rod 711. The output end of the electric telescopic rod 721 is fixedly connected to one end of the transmission frame 713 near the electric telescopic rod 721. By activating the electric telescopic rod 721, the transmission frame 713 connected to it can be moved. The outer wall of the transmission rod 61 is provided with a keyway 68, and the inner wall of the transmission sleeve 67 is provided with a spline. Through the cooperation of the keyway 68 and the spline, the tightness of the connection between the transmission rod 61 and the transmission sleeve 67 can be further enhanced. Both the driving wheel 62 and the driven wheel 63 are set as half gears.

[0031] Working principle: When the direction of fan blade 5 needs to be adjusted, the steering motor 64 is started. The output shaft of the steering motor 64 drives the drive wheel 65 to rotate. Since the drive wheel 65 and the steering wheel 66 mesh with each other, the rotation of the drive wheel 65 will drive the steering wheel 66 to rotate. The steering wheel 66 is fixed on the outer wall of the transmission sleeve 67, so the rotation of the steering wheel 66 will drive the transmission sleeve 67 to rotate on the inner wall of the support frame 1. The spline on the inner wall of the transmission sleeve 67 cooperates with the keyway 68 on the outer wall of the transmission rod 61, so that the rotation of the transmission sleeve 67 can be transmitted to the transmission rod 61, thereby driving the transmission rod 61. With synchronous rotation, the drive wheel 62, which is fixedly connected to the left end of the transmission rod 61, rotates accordingly. The drive wheel 62 meshes with the driven wheel 63, and the driven wheel 63 is fixed on the mounting plate 3. Therefore, the rotation of the drive wheel 62 will drive the driven wheel 63 to rotate in the opposite direction. The mounting plate 3 will also rotate with the driven wheel 63. The fixed sleeve 4 is installed on the left end of the mounting plate 3, and the fan blade 5 is installed on the inner wall of the fixed sleeve 4, which ultimately realizes the steering of the fan blade 5. Since the steering of the two sets of fan blades 5 is controlled by the same steering motor 64, the risk of the rotorcraft tilting due to asynchronous motor rotation is effectively reduced.

[0032] When the entire device is working normally, the extension mechanism 7 controls the support wing 2 to move laterally outward. The extension mechanism 7 is coordinated by the synchronization component 71 and the drive component 72 to activate the electric telescopic rod 721. The electric telescopic rod 721 is installed on the upper surface of the support rod 711. Its output end pushes the transmission frame 713 connected to it to move. The transmission frame 713 is fixed to the outer wall of the transmission rod 61, so the transmission rod 61 will move synchronously with the transmission frame 713. When one set of transmission frames 713 moves, it will squeeze the hinge rod 714, causing the transmission plate 712 to rotate around the support rod 711. The rotation of the transmission plate 712 will drive the other set of hinge rods 714 to move, thereby pushing the other set of transmission frames 713 to move in the opposite direction, so that the two sets of support wings 2 keep moving synchronously, ensuring the stability of the overall device during flight.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tilt-to-pitch mechanism for a rotorcraft, comprising a support frame (1), characterized in that: The inner wall of the support frame (1) is provided with a steering assembly (6), which includes a transmission sleeve (67). The transmission sleeve (67) is rotatably connected to the inner wall of the support frame (1). A transmission rod (61) is inserted into the inner wall of the transmission sleeve (67). A support wing (2) is rotatably connected to the outer wall of the transmission rod (61). A mounting plate (3) is rotatably connected to the left end of the support wing (2). A drive wheel (62) is fixedly connected to the left end of the transmission rod (61). A driven wheel (63) is fixedly connected to the left end of the mounting plate (3). The driving wheel (62) and the driven wheel (63) mesh with each other. A fixed sleeve (4) is fixedly connected to the left end of the mounting plate (3). A fan blade (5) is installed on the inner wall of the fixed sleeve (4). A steering wheel (66) is fixedly connected to the outer wall of the transmission sleeve (67). A steering motor (64) is installed on the inner wall of the support frame (1). A drive wheel (65) is fixedly connected to the right end of the output shaft of the steering motor (64). The drive wheel (65) and the steering wheel (66) mesh with each other. An extension mechanism (7) is provided on the inner wall of the support frame (1).

2. The tilt-to-pitch mechanism for a rotorcraft according to claim 1, characterized in that: The extension mechanism (7) includes a synchronization component (71) and a drive component (72). The synchronization component (71) includes a transmission frame (713), which is fixedly connected to the outer wall of the transmission rod (61).

3. The tilt-to-pitch mechanism for a rotorcraft according to claim 2, characterized in that: The inner wall of the support frame (1) is fixedly connected to a support rod (711), the outer wall of the support rod (711) is rotatably connected to a transmission plate (712), the upper surface of the transmission plate (712) is rotatably connected to a hinge rod (714), and the left end of the hinge rod (714) is rotatably connected to the upper surface of the transmission frame (713).

4. A tilt-to-pitch mechanism for a rotorcraft according to claim 3, characterized in that: The hinge rod (714) is provided in multiple sets, and the multiple sets of hinge rods (714) are arranged in a rotating array with the center line of the transmission plate (712) as the rotation axis.

5. A tilt-to-pitch mechanism for a rotorcraft according to claim 3, characterized in that: The drive assembly (72) includes an electric telescopic rod (721), which is mounted on the upper surface of the support rod (711). The output end of the electric telescopic rod (721) is fixedly connected to one end of the transmission frame (713) near the electric telescopic rod (721).

6. A tilt-to-pitch mechanism for a rotorcraft according to claim 1, characterized in that: The outer wall of the transmission rod (61) is provided with a keyway (68), and the inner wall of the transmission sleeve (67) is provided with a spline.

7. A tilt-to-pitch mechanism for a rotorcraft according to claim 1, characterized in that: Both the driving wheel (62) and the driven wheel (63) are configured as half gears.

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