Helicopter and its tail assembly

Abstract

This disclosure relates to a helicopter and its tail assembly. The tail assembly includes a tailpipe, a tail motor mounted on the tailpipe, rotating blades mounted on the tail motor, and a controller for controlling the tail motor. The tail motor has a first heat dissipation hole on the tailpipe side and an air outlet on the blade side. The tailpipe is a hollow tube, and the controller is housed within it. A second heat dissipation hole corresponding to the first heat dissipation hole is formed on the side wall of the tailpipe, allowing air from the tailpipe and tail motor to be discharged through the air outlet. This allows heat generated by the controller to be dissipated into the air through the tailpipe and tail motor, ensuring timely heat dissipation and preventing heat accumulation inside the tail motor. The placement of the second heat dissipation hole, the first heat dissipation hole, and the air outlet effectively reduces the heat generated by the controller and tail motor during operation, thereby extending their service life and preventing safety hazards.

Description

Technical Field

[0001] This disclosure relates to the field of aircraft technology, and more specifically, to a helicopter and its tail assembly. Background Technology

[0002] Helicopters typically have a main rotor to generate the lift required for takeoff. The main rotor generates a large rotational torque on the fuselage when it rotates. A tail rotor is installed at the rear of the fuselage to generate a balancing torque by producing thrust or pull, which counteracts the rotational torque and keeps the fuselage in a stable state.

[0003] The tail propeller is equipped with a tail motor and rotating blades driven by the tail motor. When the tail motor works for a long time, it will generate a lot of heat, which will affect its service life. In severe cases, it may stop operating and cause safety hazards. Summary of the Invention

[0004] One object of this disclosure is to provide a tail assembly for a helicopter to solve the problem of severe overheating in the tail section of a helicopter.

[0005] Another object of this disclosure is to provide a helicopter that includes the tail assembly provided in this disclosure.

[0006] To achieve the above objectives, this disclosure provides a tail assembly for a helicopter, including a tailpipe, a tail motor mounted on the tailpipe, rotating blades mounted on the tail motor, and a controller for controlling the tail motor. The tail motor has a first heat dissipation hole on the tailpipe side and an air outlet on the blade side. The tailpipe is a hollow tube, the controller is disposed in the tailpipe, and a second heat dissipation hole corresponding to the position of the first heat dissipation hole is formed on the side wall of the tailpipe, so that the gas in the tailpipe and the tail motor can be discharged through the air outlet.

[0007] Optionally, the internal structure of the tail motor is a centrifugal fan structure configured to generate airflow from the tailpipe side to the blade side when rotating.

[0008] Optionally, the air outlet is located on the side circumferential surface of the tail motor.

[0009] Optionally, the front end of the tail tube has an opening, and the opening is filled with filter foam.

[0010] Optionally, the tail assembly further includes a vertical tail fin mounted on the tailpipe, the vertical tail fin being positioned opposite the tail motor.

[0011] Optionally, the vertical tail fin and the tail motor are fixedly connected by fasteners that pass through the tailpipe.

[0012] Optionally, a pressure plate is provided between the vertical tail fin and the tail tube, and the pressure plate is respectively fitted to the profiles of the vertical tail fin and the tail tube.

[0013] Optionally, the tail motor has a lug on its tail tube side that fits onto the tail tube, and the lug has a receiving hole; the fastener includes a bolt extending from the vertical tail fin to the tail motor and a nut disposed in the receiving hole that can engage with the bolt, and the head of the bolt abuts against the vertical tail fin.

[0014] Optionally, a gasket is provided between the head and the vertical tail fin. The gasket is constructed to be a groove shape that can accommodate the head, and the head of the bolt abuts against the bottom of the groove of the gasket.

[0015] According to a second aspect of this disclosure, a helicopter is provided, the helicopter including the tail assembly described above.

[0016] Through the above technical solution, on the one hand, the heat generated by the controller can be discharged into the air through the tailpipe and tail motor; on the other hand, the heat generated by the tail motor during operation can be dissipated in a timely manner, preventing heat from concentrating inside the tail motor and instead dissipating into the air. The design of the second heat dissipation vent, the first heat dissipation vent, and the air outlet effectively reduces the heat generated by the controller and tail motor during operation, thereby extending their service life and preventing safety hazards. Furthermore, since the tailpipe is a hollow tube, electronic equipment such as the controller and electronic speed controller are housed within it, thus shortening the wiring length of electrical equipment and reducing the impact of electrical radiation on the electronic components in the helicopter's flight control system.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the tail assembly of a helicopter according to one embodiment of the present disclosure;

[0020] Figure 2 yes Figure 1 The illustrated embodiment shows a partial view of the rear end of the tail assembly, where the tailpipe cap is not shown.

[0021] Figure 3 yes Figure 1 An exploded view of the tail assembly at one angle in the illustrated embodiment;

[0022] Figure 4 yes Figure 1 An exploded view of the tail assembly from another angle in the illustrated embodiment;

[0023] Figure 5 yes Figure 1 The illustrated embodiment shows a schematic diagram of the connection between the vertical tail fin and the tail motor.

[0024] Explanation of reference numerals in the attached figures

[0025] 10 Tailpipe 11 Second heat dissipation hole

[0026] 12 Tail cover 20 Tail motor

[0027] 21 First heat dissipation hole 22 Air outlet

[0028] 23 protruding ears 40 compressed tablets

[0029] 51 Bolt 52 Nut

[0030] 60 gasket Detailed Implementation

[0031] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0032] In the embodiments of this disclosure, unless otherwise stated, the directional terms "inner" and "outer" refer to the outline of the corresponding component itself. The terms "first" and "second" used in the embodiments of this disclosure are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same or similar elements.

[0033] Reference Figure 1 The tail assembly of the helicopter provided in this embodiment includes a tailpipe 10, a tail motor 20 mounted on the tailpipe 10, rotating blades (not shown) mounted on the tail motor 20, and a controller for controlling the tail motor 20. The output shaft of the tail motor 20 extends horizontally, and the rotation of the rotating blades generates a horizontal force on the tailpipe 10, thereby balancing the rotational torque generated by the fuselage under the action of the main propeller. Further reference... Figure 3 and Figure 4The tail motor 20 has a first heat dissipation hole 21 on the tail tube side and an air outlet 22 on the blade side. To improve the installation stability of the tail motor 20 and the tail tube 10, the tail tube side profile of the tail motor 20 can fit against the tail tube 10. The tail tube 10 is a hollow tube, and the aforementioned controller is installed in the tail tube 10. In addition, a second heat dissipation hole 11 corresponding to the position of the first heat dissipation hole 21 is opened on the side wall of the tail tube 10, that is, the interior of the tail motor 20 is connected to the interior of the tail tube 10, so that the gas in the tail tube 10 and the tail motor 20 can be discharged through the air outlet 22. It should be noted that other holes different from the second heat dissipation hole 11 (such as the opening described below) can also be opened on the tail tube 10 to ensure that the gas in the tail tube 10 can always be sucked out. It should also be noted that, referring to Figure 1 The tailpipe 10 is provided with a tail cap 12 to prevent dust and other impurities from entering the tailpipe 10. For example, when the helicopter is used for plant protection, it can prevent the sprayed pesticides from entering the tailpipe 10 and causing damage to the airframe structure.

[0034] In this way, on the one hand, the heat generated by the controller can be exhausted into the air through the tailpipe 10 and tail motor 20; on the other hand, the heat generated by the tail motor 20 during operation can be dissipated in a timely manner, preventing heat from concentrating inside the tail motor 20 and instead dissipating it into the air. The design of the second heat dissipation hole 11, the first heat dissipation hole 21, and the air outlet 22 effectively reduces the heat generated by the controller and tail motor 20 during operation, thereby extending their service life and preventing safety hazards. Furthermore, since the tailpipe 10 is a hollow tube, electronic equipment such as the controller and electronic speed controller are housed within it, thus shortening the wiring length of the electrical equipment and reducing the impact of electrical radiation on the electronic components in the helicopter's flight control system.

[0035] Furthermore, the tail motor 20 can be internally configured as a centrifugal fan structure. This centrifugal fan structure is configured to generate airflow from the tailpipe side to the blade side during rotation. In this way, the airflow can quickly expel the heat inside the tailpipe 10 and the tail motor 20 into the air, improving the heat dissipation effect. The continuous airflow generated by the centrifugal fan structure can quickly cool the tail motor 20, the controller, and other electrical components inside the tailpipe 10.

[0036] Furthermore, according to some embodiments, the heat dissipation can be further accelerated by the pressure difference generated by the rotating blades. Specifically, see... Figures 2 to 4 An air outlet 22 can be provided on the blade side of the tail motor 20. The rotating blades are configured to generate a force that draws gas from the tailpipe 10 into the tail motor 20 during rotation, so that the gas is discharged through the air outlet 22. That is, with Figure 2For example, when the rotating blades rotate, the air pressure on the left side of the diagram is lower, while the air pressure on the right side of the diagram, i.e., inside the tailpipe 10, is higher. Thus, the gas can be discharged sequentially through the second heat dissipation hole 11, the first heat dissipation hole 21, and the air outlet 22. In this embodiment, the tailpipe 10 forms a continuous airflow towards the tail motor 20. This airflow can, on the one hand, blow away corrosive impurities that have accumulated on the tail motor 20 due to long-term exposure to air, extending the service life of the tail motor 20. On the other hand, when electrical equipment is installed inside the tailpipe 10 as described above, the continuous airflow can also dissipate heat from this electrical equipment, improving its service life.

[0037] According to some embodiments, refer to Figure 2 The air outlet 22 can be located on the side circumferential surface of the tail motor 20, that is, not on the end face of the blade side, to avoid the drawn-out gas flowing directly to the rotating blades, which would affect the rotation of the blades. For example, in Figure 2 In the illustrated embodiment, the air outlet 22 is annular and is located on the side peripheral surface of the tail motor 20 adjacent to the end face.

[0038] According to some embodiments, the tailpipe 10 has an opening at its front end, and this opening is filled with filter foam so that impurities are filtered out in advance when air is drawn into the tailpipe 10. Of course, the opening can also be made at other locations on the tailpipe 10, but it should be noted that the location of the opening should be far away from the tail motor 20, because more impurities are usually generated near the tail motor 20, and opening near the tail motor 20 can easily cause impurities to be drawn into the tailpipe 10.

[0039] like Figures 1 to 5 As shown, according to some embodiments, the tail assembly provided in this disclosure may further include a vertical tail fin 30 mounted on the tail tube 10. The vertical tail fin 30 is fixed on the tail tube 10, and the vertical tail fin 30 is used to ensure the horizontal stability of the helicopter.

[0040] According to some embodiments, refer to Figure 1 and Figure 2 The vertical tail fin 30 can be positioned on the opposite side of the tail motor 20 to balance the helicopter's center of gravity, ensuring that the center of gravity is located on the longitudinal centerline of the helicopter.

[0041] Furthermore, referring to Figure 2 and Figure 5 The vertical tail fin 30 and the tail motor 20 can be fixedly connected by fasteners that penetrate the tail tube 10. In this way, the vertical tail fin 30 and the tail motor 20 do not need to be directly fixed to the tail tube 10, but are connected to each other by fasteners. The tail tube 10, which is penetrated by the fasteners, only serves as a part for positioning the vertical tail fin 30 and the tail motor 20, thereby improving the convenience of disassembly and assembly.

[0042] Furthermore, in order to improve the connection stability between the vertical tail fin 30, the tailpipe 10, and the tail motor 20, such as Figure 3 and Figure 4 As shown, a pressure plate 40 can be provided between the vertical tail fin 30 and the tail tube 10, and the pressure plate 40 is respectively fitted to the surface of the vertical tail fin 30 and the tail tube 10. In this way, the pressure plate 40 and the tail motor 20 can tightly press the tail tube 10 between them, and neither the tail motor 20 nor the vertical tail fin 30 will shake arbitrarily during operation.

[0043] This disclosure does not limit the specific connection form between the tail motor 20 and the vertical tail fin 30; the following only uses... Figure 2 and Figure 5 The illustrated implementation is provided as an example. Specifically, refer to... Figure 2 The tail motor 20 has a lug 23 on its tail tube side that fits against the tail tube 10, and the lug 23 has a receiving hole. The fasteners include a bolt 51 extending from the vertical tail fin 30 to the tail motor 20 and a nut 52 disposed in the receiving hole that engages with the bolt 51. The head of the bolt 51 abuts against the vertical tail fin 30. In this embodiment, the vertical tail fin 30, tail tube 10, and tail motor 20 are installed via a threaded connection. The nut 52 can be a self-locking nut, and its thickness does not exceed the thickness of the lug 23, preventing it from protruding from the receiving hole and avoiding damage from impact. Furthermore, there are multiple bolts 51 and nuts 52 to improve the stability of the connection. For example, see reference... Figure 4 and Figure 5 There are two lugs 23, which are symmetrically arranged on both sides of the tail motor 20.

[0044] Furthermore, referring to Figure 5 A washer 60 can be provided between the head of bolt 51 and the vertical tail fin 30 to ensure the reliability of the threaded connection. The washer 60 can be a common rubber washer or a spring washer, etc.

[0045] Furthermore, referring to Figure 5 The aforementioned gasket 60 can be constructed as a groove shape capable of accommodating the head, with the head of the bolt 51 abutting against the bottom of the groove of the gasket 60, and as... Figure 5 As shown, in this case, the thickness of the head of the bolt 51 does not exceed the groove depth of the washer 60, so that the head of the bolt 51 will not protrude from the groove and will not be damaged by impact.

[0046] According to a second aspect of the present disclosure, a helicopter is provided that includes the tail assembly described above and has all the beneficial effects of the tail assembly, which will not be repeated here. Furthermore, the helicopter provided in the embodiments of the present disclosure can be a pilot-operated helicopter or an unmanned helicopter.

[0047] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0049] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A tail assembly for a helicopter, comprising a tailpipe (10), a tail motor (20) mounted on the tailpipe (10), rotating blades mounted on the tail motor (20), and a controller for controlling the tail motor (20), characterized in that, The tail motor (20) has a first heat dissipation hole (21) on the tail tube side and an air outlet (22) on the blade side. The tailpipe (10) is a hollow tube, the controller is installed in the tailpipe (10), the side wall of the tailpipe (10) is provided with a second heat dissipation hole (11) corresponding to the position of the first heat dissipation hole (21), the interior of the tail motor (20) is connected to the interior of the tailpipe (10) so that the gas in the tailpipe (10) and the tail motor (20) is discharged through the air outlet (22), the air outlet (22) is opened on the side circumferential surface of the tail motor (20), the front end of the tailpipe (10) is formed with an opening, and the opening is filled with filter foam, the rotating blade is configured to generate a force to draw the gas in the tailpipe (10) into the tail motor (20) when rotating, so that the gas is discharged through the air outlet (22); The tail assembly also includes a vertical tail fin (30) mounted on the tail tube (10), the vertical tail fin (30) being disposed on the opposite side of the tail motor (20), and the vertical tail fin (30) and the tail motor (20) being fixedly connected by fasteners passing through the tail tube (10).

2. The tail assembly according to claim 1, characterized in that, The internal structure of the tail motor (20) is a centrifugal fan structure configured to generate airflow from the tailpipe side to the blade side when rotating.

3. The tail assembly according to claim 1, characterized in that, A pressure plate (40) is provided between the vertical tail fin (30) and the tail tube (10), and the pressure plate (40) is respectively fitted to the surface of the vertical tail fin (30) and the tail tube (10).

4. The tail assembly according to claim 1, characterized in that, The tail motor (20) has a lug (23) on the tail tube side that fits onto the tail tube (10), and the lug (23) has a receiving hole; The fastener includes a bolt (51) extending from the vertical tail fin (30) to the tail motor (20) and a nut (52) disposed in the receiving hole that engages with the bolt (51), the head of the bolt (51) abutting against the vertical tail fin (30).

5. The tail assembly according to claim 4, characterized in that, A gasket (60) is provided between the head and the vertical tail fin (30). The gasket (60) is constructed to be a groove shape that can accommodate the head. The head of the bolt (51) abuts against the bottom of the groove of the gasket (60).

6. A helicopter, characterized in that, The helicopter includes a tail assembly according to any one of claims 1-5.

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