Supporting structure of folding rotor wing of helicopter

Abstract

The utility model belongs to the technical field of rotor aircrafts, and particularly relates to a supporting structure of a folding rotor of a helicopter, which comprises a first supporting plate, a second supporting plate and a third supporting plate, the first supporting plate comprises a first tail beam groove and a first blade groove, and the first tail beam groove and the first blade groove are positioned on the same side of the first supporting plate; the second supporting plate comprises a second tail beam groove and a second paddle groove, and the second tail beam groove and the second paddle groove are located on the same side of the second supporting plate; the first tail beam groove and the second tail beam groove which are in butt joint form a tail beam hole used for containing a tail beam of the helicopter. The first blade groove and the second blade groove which are in butt joint form a blade hole used for containing blades of the helicopter. The folded blades are supported, the helicopter transportation and parking space utilization rate is increased, and the unfolding and folding time is shortened.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotorcraft, and particularly relates to the support structure of helicopter folding rotors. Background Technology

[0002] Helicopters possess advantages such as high maneuverability and ease of use, and are widely used in various fields including military, maritime reconnaissance, emergency rescue and disaster relief, fire patrol, and material delivery. The utilization rate of helicopter transport and parking space, as well as deployment and retraction time, play a crucial role in the operation of helicopters. To improve the utilization rate of helicopter transport and parking space and reduce deployment and retraction time, it is usually necessary to fold the rotor. Utility Model Content

[0003] Based on the above analysis, the present invention aims to provide a support structure for a helicopter folding rotor, which aims to improve the utilization rate of helicopter transportation and parking space, and reduce deployment and retraction time.

[0004] The support structure for the helicopter folding rotor provided in this application includes:

[0005] The first support plate includes a first tail beam groove and a first blade groove, wherein the first tail beam groove and the first blade groove are located on the same side of the first support plate.

[0006] The second support plate includes a second tail beam groove and a second blade groove, wherein the second tail beam groove and the second blade groove are located on the same side of the second support plate.

[0007] The first tail boom groove and the second tail boom groove that are connected together form a tail boom hole for the tail boom of the helicopter to pass through;

[0008] The mating first blade groove and the second blade groove form a blade hole through which the helicopter blades pass.

[0009] In one embodiment, the tail beam hole is a tapered hole.

[0010] In one embodiment, the end of the tail beam hole with a larger diameter is symmetrically provided with a flat tail mounting lip groove, the flat tail mounting lip groove transitions from the hole wall of the tail beam hole to the plate surface of the first support plate and the second support plate by an arc surface; the flat tail mounting lip groove is used to fit with the closed end of the flat tail mounting lip.

[0011] In one embodiment, the first support plate is provided with a plurality of first blade grooves, and the second support plate is provided with a plurality of second blade grooves.

[0012] The position of the first blade groove on the first support plate is the same as the position of the second blade groove on the second support plate.

[0013] In one embodiment, the support structure further includes:

[0014] A connecting clip, wherein the cross-section of the connecting clip is larger at both ends and smaller in the middle;

[0015] The first support plate is provided with a first connecting slot on the same side as the first tail beam groove, and the second support plate is provided with a second connecting slot on the same side as the second tail beam groove.

[0016] The connecting card is embedded in the connecting hole formed by the first connecting card slot and the second connecting card slot for connecting the first support plate and the second support plate.

[0017] In one embodiment, the first connecting slot is provided at both ends of the first support plate and between the first blade groove and the first tail beam groove.

[0018] The second connecting slot is provided at both ends of the second support plate and between the second blade groove and the second tail beam groove;

[0019] Each pair of first and second connecting slots forms a connecting hole in which a connecting card is embedded.

[0020] In one embodiment, the connecting clip is made of high-density rigid foam.

[0021] In one embodiment, one of the mating surfaces of the first support plate and the second support plate has a connector and the other has a socket.

[0022] The connector can be inserted into the socket.

[0023] In one embodiment, the connectors and sockets are provided in multiple pairs.

[0024] In one embodiment, the first support plate and the second support plate have the same structure and dimensions.

[0025] Compared with the prior art, the present invention can achieve at least the following beneficial effects:

[0026] The support structure for a helicopter folding rotor provided by this utility model fixes and supports the position of the support structure by fitting the tail boom hole onto the tail boom of the helicopter. The helicopter rotor is then placed into the first blade groove and / or the second blade groove, and connected to the first support plate and the second support plate to support the blade. After folding, the blade is located above the tail boom of the helicopter, occupying minimal parking space. The support structure uses the tail boom as a base, simplifying the installation process and reducing the time required for rotor deployment and retraction. In summary, the support structure provided by this application improves the utilization rate of helicopter transportation and parking space, reduces deployment and retraction time, and achieves high space utilization and rapid deployment.

[0027] For unmanned helicopters, especially medium and large-sized drones, the support structure for the folding rotor of the helicopter provided in this application can significantly save the space required for transportation and parking, and reduce the time for unmanned helicopter rotor deployment and retraction, thereby enabling rapid deployment.

[0028] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0029] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0030] Figure 1 This is a schematic diagram of the support structure for the helicopter folding rotor provided in Embodiment 1.

[0031] Figure 2 This is a schematic diagram of the helicopter tail boom in Embodiment 1.

[0032] Figure 3 This is a partial structural diagram of the support structure described in Embodiment 1;

[0033] Figure 4 This is a schematic diagram of the support structure in use as described in Embodiment 1. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0035] Example 1

[0036] This embodiment provides a support structure for a helicopter folding rotor, used to support the folded rotor after it has been folded. Specifically, refer to... Figures 1 to 4 The supporting structure includes:

[0037] The first support plate 1 includes a first tail beam groove 14 and a first blade groove 12, wherein the first tail beam groove 14 and the first blade groove 12 are located on the same side of the first support plate 1; see reference Figure 1 The first support plate 1 is in the shape of a long, thin plate. The first tail beam groove 14 and the first blade groove 12 are located on the same side of the first support plate 1, meaning that the first tail beam groove 14 and the first blade groove 12 are both located on the same longer side of the long, thin plate-shaped first support plate 1.

[0038] The second support plate 2 includes a second tail beam groove 24 and a second blade groove 22, wherein the second tail beam groove 24 and the second blade groove 22 are located on the same side of the second support plate 2; see reference Figure 1 The second support plate 2 is in the shape of a long, thin plate. The second tail beam groove 24 and the second blade groove 22 are located on the same side of the first support plate 1, meaning that the second tail beam groove 24 and the second blade groove 22 are both located on the same longer side of the long, thin plate-shaped second support plate 2.

[0039] The first tail boom groove 14 and the second tail boom groove 24, which are connected, form a tail boom hole through which the tail boom 100 of the helicopter passes.

[0040] The first blade groove 12 and the second blade groove 22, which are mated together, form a blade hole through which the rotor blade 200 of the helicopter passes.

[0041] Reference Figure 4 When folding the rotor, adjust the rotor hub axis a to be perpendicular to the tail boom axis b, remove the blade pin on the front side of the blade in the heading direction, and rotate the blade towards the tail boom so that the blade is basically parallel to the tail boom axis.

[0042] Then, the first support plate 1 and the second support plate 2 are brought closer to the tail beam 100 from the left and right directions respectively. The vertical height of the blade 200 is adjusted so that the blade 200 is placed at the first blade groove 12 and the second blade groove 22. The mating surfaces of the first support plate 1 and the second support plate 2 are joined and clamped onto the tail beam 100.

[0043] The helicopter folding rotor support structure provided in this embodiment fixes and supports the position of the support structure by fitting the tail boom hole, which is composed of the first tail boom groove 14 and the second tail boom groove 24, onto the tail boom 100 of the helicopter. The helicopter rotor is then placed into the first blade groove 12 and / or the second blade groove 22 and connected to the first support plate 1 and the second support plate 2 to support the blade. After folding, the blade 200 is located above the tail boom 100 of the helicopter, occupying minimal parking space. The support structure uses the tail boom 100 as a base, simplifying the installation process and reducing the time required for rotor deployment and retraction.

[0044] In summary, the support structure provided in this embodiment improves the utilization rate of helicopter transportation and parking space, and reduces deployment and retrieval time, achieving the effect of high space utilization and rapid deployment.

[0045] In this embodiment, the tail boom hole is a tapered hole, corresponding to the conical shape of the tail boom 100 of the helicopter. The tail boom hole of the support structure forms a surface contact with the tail boom of the helicopter, thereby improving the support stability.

[0046] In this embodiment, refer to Figure 2 and Figure 3 The tail boom hole has a symmetrical flat tail mounting lip groove 24 at the larger diameter end. The flat tail mounting lip groove 24 transitions from the hole wall of the tail boom hole to the surface of the first support plate 1 and the second support plate 2 via an arc surface. The flat tail mounting lip groove 24 is used to fit against the closed end of the flat tail mounting lip 101. In addition to being supported by the tail boom 100, this embodiment also uses the flat tail mounting lip groove 101 on the tail boom 100 for positioning to prevent the support structure from deflecting and damaging the blade 200.

[0047] In this embodiment, the first support plate 1 is provided with 4 first blade grooves 12, and the second support plate 2 is provided with 4 second blade grooves 22.

[0048] The position of the first blade groove 12 on the first support plate 1 is the same as the position of the second blade groove 22 on the second support plate 2.

[0049] Each blade is housed within the blade hole formed by the first blade groove 12 and the first blade groove 22. Separating and fixing the blades 200 prevents wear and collision between multiple blades 200. Corresponding to the different installation heights of the blade roots, the height of each blade hole on the support structure is approximately equal to the height of the blade root of each blade 200. Therefore, when supporting the folded blades 200, the problem of the support structure bending the blades 200 and causing damage due to a large difference between the height of the blade hole and the height of the blade root can be avoided.

[0050] In other embodiments, depending on the number of blades to be supported, the first support plate 1 of the support structure may have fewer or more first blade grooves 12, and the second support plate 2 may have fewer or more second blade grooves 22.

[0051] In this embodiment, the support structure further includes:

[0052] Connecting clip 4, the cross-section of which is large at both ends and small in the middle;

[0053] The first support plate 1 is provided with a first connecting slot 11 on the same side as the first tail beam groove 13, and the second support plate 2 is provided with a second connecting slot 21 on the same side as the second tail beam groove 23;

[0054] The connecting card 4 is embedded in the connecting hole formed by the first connecting card slot 11 and the second connecting card slot 21 for connecting the first support plate 1 and the second support plate 2.

[0055] In this embodiment, both the first connecting slot 11 and the second connecting slot 21 are C-shaped slots; in other embodiments, they may be dovetail slots, etc.

[0056] The first support plate 1 and the second support plate 2 are connected by the connecting clip 4. The connection operation is simple and easy, which helps to reduce the deployment and retraction time of the blade 200.

[0057] In this embodiment, a plurality of first connecting slots 11 are provided on the first support plate 1, and a plurality of second connecting slots 21 are provided on the second support plate 2; a connecting card 4 is embedded in each pair of mating first connecting slots 11 and second connecting slots 21, providing multi-point connection and fixation for the first support plate 1 and the second support plate 2, thereby enhancing the connection between the two.

[0058] In this embodiment, the first connecting slot 11 is provided at both ends of the first support plate 1, between the first blade groove 12 and the first tail beam groove 13, and between the two upper first blade grooves 12 and the two lower first blade grooves 12.

[0059] The second connecting slot 21 is provided at both ends of the first support plate 2, between the second blade groove 22 and the second tail beam groove 23, and between the upper two second blade grooves 22 and the lower two second blade grooves 22.

[0060] Each pair of mating first connecting slots 11 and second connecting slots 21 contains a connecting card 4.

[0061] In this embodiment, the material of the connecting clip 4 can be selected as a high-density rigid foam material. For example, the connecting clip 4 can be made of polyurethane rigid foam, polystyrene board or PVC board. The connecting clip 4 made of high-density rigid foam material has appropriate hardness so that it can realize the function of connecting the first support plate 1 and the second support plate 2. When it is inserted into the hole formed by the mating first connecting slot 11 and the second connecting slot 21, it can deform under the interference fit of the two so that the connecting clip 4 can be inserted into the hole.

[0062] In this embodiment, insertion holes are provided on the mating surfaces of the first support plate 1 and the second support plate 2, and insertion connectors 3 are provided on the mating surfaces of the second support plate 2 and the first support plate 1.

[0063] After the first support plate 1 and the second support plate 2 are connected, the plug-in 3 can be inserted into the plug hole. The connection between the plug-in 3 and the plug hole prevents the support structure from bending and deforming in a direction perpendicular to the surface of the first support plate 1 and the second support plate 2, and can guide the first support plate 1 and the second support plate 2 when they come close to each other.

[0064] In one embodiment, taking the second support plate 2 having the connector 3 and the first support plate 1 having the insertion hole as an example: both the first support plate 1 and the second support plate 2 have insertion holes on their mating surfaces. When using the support structure for the first time, one end of the connector 3, which is an independent part, is inserted into the insertion hole on the second support plate 2, and then the connector 3 is fixed to the second support plate 2 by adhesive. In this embodiment, the first support plate 1 and the second support plate 2 are parts with identical structure and dimensions during the manufacturing stage, which facilitates production and reduces production costs.

[0065] Preferably, the connector 3 and the socket are provided in multiple pairs.

[0066] In this embodiment, the connector 3 is a cylinder, the socket is a circular hole, and the outer diameter of the connector 3 is equal to the inner diameter of the socket. In other embodiments, the connector 3 can be a triangular prism or a polygonal prism, and the socket can be a triangular prism hole or a polygonal prism hole.

[0067] In this embodiment, the connector 3 is made of carbon fiber. The carbon fiber connector 3 has high specific strength and specific stiffness, which can better prevent the support structure from bending deformation in the direction perpendicular to the surface of the first support plate 1 and the second support plate 2.

[0068] In the above embodiment, when folding the rotor, adjust the rotor hub axis a to be perpendicular to the tail boom axis b, remove the blade pin on the front side of the blade in the heading direction, and rotate the blade to move closer to the tail boom so that the blade is basically parallel to the tail boom axis.

[0069] Next, the first support plate 1 and the second support plate 2 are brought closer to the tail boom 100 from the left and right directions, respectively. The vertical height of the blade 200 is adjusted, and the connector 3 on the second support plate 2 is pre-inserted into the socket of the first support plate 1. The vertical height of the blade 200 is adjusted so that the blade 200 is positioned in the first blade groove 12 and the second blade groove 22. The mating surfaces of the first support plate 1 and the second support plate 2 are then joined and clamped onto the tail boom 100. Connecting clips 4 are placed in the first connecting slot 11 and the second connecting slot 21 of the first support plate 1 and the second support plate 2. The mating surfaces of the first support plate 1 and the second support plate 2 are then joined and clamped onto the tail boom 100.

[0070] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A support structure for a helicopter folding rotor, characterized in that, include: The first support plate includes a first tail beam groove and a first blade groove, wherein the first tail beam groove and the first blade groove are located on the same side of the first support plate. The second support plate includes a second tail beam groove and a second blade groove, wherein the second tail beam groove and the second blade groove are located on the same side of the second support plate. The first tail boom groove and the second tail boom groove that are connected together form a tail boom hole for the tail boom of the helicopter to pass through; The mating first blade groove and the second blade groove form a blade hole through which the helicopter blades pass.

2. The support structure according to claim 1, characterized in that, The tail beam hole is a tapered hole.

3. The support structure according to claim 2, characterized in that, The larger diameter end of the tail beam hole is symmetrically provided with a flat tail mounting lip groove. The flat tail mounting lip groove transitions from the hole wall of the tail beam hole to the plate surface of the first support plate and the second support plate in an arc. The flat tail mounting lip groove is used to fit with the closed end of the flat tail mounting lip.

4. The support structure according to claim 1, characterized in that, The first support plate is provided with a plurality of first blade grooves, and the second support plate is provided with a plurality of second blade grooves. The position of the first blade groove on the first support plate is the same as the position of the second blade groove on the second support plate.

5. The support structure according to claim 1, characterized in that, Also includes: A connecting clip, wherein the cross-section of the connecting clip is larger at both ends and smaller in the middle; The first support plate is provided with a first connecting slot on the same side as the first tail beam groove, and the second support plate is provided with a second connecting slot on the same side as the second tail beam groove. The connecting card is embedded in the connecting hole formed by the first connecting card slot and the second connecting card slot for connecting the first support plate and the second support plate.

6. The support structure according to claim 5, characterized in that, The first connecting slot is provided at both ends of the first support plate and between the first blade groove and the first tail beam groove. The second connecting slot is provided at both ends of the second support plate and between the second blade groove and the second tail beam groove; Each pair of first and second connecting slots forms a connecting hole in which a connecting card is embedded.

7. The support structure according to claim 5, characterized in that, The connecting clip is made of high-density rigid foam.

8. The support structure according to claim 1, characterized in that, On the mating surfaces of the first support plate and the second support plate, one has a connector and the other has a socket. The connector can be inserted into the socket.

9. The support structure according to claim 8, characterized in that, The connectors and sockets are provided in multiple pairs.

10. The support structure according to claim 1, characterized in that, The first support plate and the second support plate have the same structure and dimensions.

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