A foldable-blade helicopter

Abstract

The application provides a foldable-blade helicopter, and relates to the technical field of helicopters.The helicopter is provided with a tail beam and foldable blades of a propeller, when the tail beam and the blades are in a folded state, the helicopter can effectively reduce the occupied space, thereby effectively improving the portability and transportation convenience of the helicopter; further, the helicopter is also provided with a supporting device, which can support and fix the folded blades, thereby effectively increasing the stability and safety of the blades.

Description

Technical Field

[0001] This application relates to the field of helicopter technology, and in particular to a helicopter with foldable rotor blades. Background Technology

[0002] Helicopters (including unmanned helicopters) are playing an increasingly important role as aircraft in fields such as military reconnaissance, material transportation, and disaster relief. With the continuous expansion of application scenarios, higher demands are being placed on the portability and ease of transport of helicopters. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a helicopter with foldable rotor blades to solve the problem of poor portability and transportation convenience of existing helicopters.

[0004] In accordance with the above objectives, the present invention provides a helicopter with foldable rotor blades, wherein the helicopter with foldable rotor blades comprises:

[0005] The fuselage features a foldable tail boom;

[0006] A propeller assembly is rotatably connected to the body via a rotating shaft. The propeller assembly includes multiple blades. When the propeller assembly is in the deployed state, each blade extends radially along the rotating shaft. When the propeller assembly is in the folded state, the multiple blades are misaligned along the axial direction of the rotating shaft and converge to the same radial side of the rotating shaft.

[0007] A support device is disposed on the outer wall of the body. The support device includes multiple support members, each of which has a fixing part. When the propeller device is in the folded state, the fixing part is connected to the propeller blade.

[0008] Preferably, the propeller assembly further includes a base and a hub sleeved on the outer side of the rotating shaft; along the axial direction of the rotating shaft, the hub is located at the top of the base away from the body;

[0009] The rotor hub has a plurality of first assembly parts arranged circumferentially along the rotation axis, and the rotor blades are connected to the first assembly parts one by one through second assembly parts.

[0010] The second assembly part is connected to a fine-tuning mechanism.

[0011] Preferably, the first assembly portion includes a through hole extending through the end of the propeller hub along the axial direction of the rotation axis, and the first assembly portion further includes a first assembly hole formed on the outer side of the propeller hub, the first assembly hole extending radially along the rotation axis;

[0012] The second assembly part includes an assembly block and an assembly shaft;

[0013] The assembly block is disposed in the through hole and forms a second assembly hole corresponding to the first assembly hole; the assembly shaft forms at least two limiting plates, and the two limiting plates are detachably connected to the positions of the assembly block protruding from the top and bottom ends of the propeller hub, respectively.

[0014] The fine-tuning mechanism is formed as a telescopic rod structure, and its two ends are respectively hinged to the assembly shaft and the base.

[0015] Preferably, the second assembly part further includes a sleeve fitted onto the outer side of the assembly shaft;

[0016] A first extension platform is formed around the outer side of the assembly shaft, and a second extension platform corresponding to the first extension platform is formed at the opening of the sleeve; the first extension platform is formed with a plurality of first adjustment holes spaced apart circumferentially along the assembly shaft, and the second extension platform is formed with a second adjustment hole corresponding to the first adjustment hole.

[0017] The sleeve is rotatable relative to the assembly shaft.

[0018] Preferably, the end of the sleeve is provided with a mounting seat, the mounting seat having a first pivot portion and a first locking portion; the blade is rotatably connected to the blade hub through the first pivot portion, and the blade is detachably connected to the first locking portion.

[0019] When the blade is connected to the first locking part, the blade extends radially along the rotation axis so that the propeller device is in the unfolded state; when the blade is separated from the first locking part, the blade can rotate relative to the rotation axis through the first pivot part so that the propeller device is in the folded state.

[0020] Preferably, the support member includes a telescopic positioning rod and a support rod; the first end of the positioning rod extending in the direction of extension is inserted into the body; the first end of the support rod extending in the direction of extension is hinged to the positioning rod; and the second end of the support rod extending in the direction of extension is provided with a fixing mechanism to form the fixing part.

[0021] Preferably, the number of support rods is one or more.

[0022] Preferably, the fixing mechanism includes a lower jaw and an upper jaw rotatably connected to the lower jaw, the lower jaw and the upper jaw forming the fixing part, and the fixing part is formed as an open structure;

[0023] The lower gripper is movably connected to the support rod, and the opening angle of the fixed part can be adjusted through the support rod.

[0024] Preferably, along the length of the body, the tail beam of the body has a fixed section and a folding section, and the support device is connected to the fixed section accordingly.

[0025] Preferably, the fixed section and the folding section are rotatably connected by a second pivot; when the tail beam is in the folded state, the fixed section and the folding section are locked by a second locking part; when the tail beam is in the closed state, the fixed section and the folding section are locked by a third locking part.

[0026] The helicopter with foldable rotor blades according to the present invention has a foldable structure for both its tail boom and rotor blades. When both the tail boom and rotor blades are in the folded state, the space occupied by the helicopter can be effectively reduced, thereby effectively improving the portability and transportation convenience of the helicopter. Furthermore, the helicopter is also provided with a support device, which can support and fix the folded rotor blades, effectively increasing the stability and safety of the rotor blades.

[0027] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a partial schematic diagram of a propeller device according to an embodiment of the present invention;

[0030] Figure 2 This is another schematic diagram of a propeller device according to an embodiment of the present invention;

[0031] Figure 3 This is a partially exploded schematic diagram of the propeller hub and the second assembly part according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of a support device according to an embodiment of the present invention;

[0033] Figure 5 This is another schematic diagram of a support device according to an embodiment of the present invention;

[0034] Figure 6This is a first schematic diagram of a support member according to an embodiment of the present invention;

[0035] Figure 7 This is a second schematic diagram of a support member according to an embodiment of the present invention;

[0036] Figure 8 This is a third schematic diagram of a support member according to an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of a fixing mechanism according to an embodiment of the present invention;

[0038] Figure 10 This is a cross-sectional view of the fixing mechanism according to an embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of the folding of the tail beam according to an embodiment of the present invention.

[0040] Icons: 1-Body; 11-Fixed Section; 12-Folding Section; 13-Blade; 21-Rotating Shaft; 22-Base; 23-Blade Hub; 231-Through Hole; 232-First Assembly Hole; 31-Assembly Block; 311-Second Assembly Hole; 32-Assembly Shaft; 321-Limiting Plate; 322-First Extension Platform; 3221-First Adjustment Hole; 33-Sleeve; 331-Second Extension Platform; 332-Second Adjustment Hole; 34-Fine Adjustment Mechanism; 35-Mounting Base; 351-First Pivot; 352-First Locking Part; 4-Support Member; 41- Positioning rod; 42-Support rod; 421-Fixing rod; 422-Lifting sleeve; 43-Fixing mechanism; 431-Upper gripper; 4311-Limiting post; 4312-Hinge shaft; 432-Lower gripper; 433-Fixing part; 4341-Drive shaft; 4342-Moving block; 4343-Slot; 4351-Upper transmission component; 4352-Lower transmission component; 4353-Adjusting block; 4361-Upper limit component; 4362-Lower limit component; 4363-Spring; 51-Second pivot part; 52-Second locking part; 53-Third locking part. Detailed Implementation

[0041] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0042] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0043] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0044] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0045] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0046] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0047] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0048] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0049] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0050] The present invention provides a helicopter with foldable rotor blades, which has a foldable tail boom and rotor blades 13, thereby effectively reducing the space occupied by the overall structure of the helicopter during transportation and other processes, making the helicopter highly portable and convenient to transport. The specific structure and assembly method of the above-mentioned components of the helicopter with foldable rotor blades (hereinafter referred to as the helicopter) according to the present invention will be described in detail below.

[0051] like Figures 1 to 3 As shown, the helicopter in this embodiment includes a propeller assembly, which is rotatably connected to the helicopter fuselage 1 via a rotating shaft 21. Furthermore, the propeller assembly includes multiple blades 13 arranged circumferentially along the rotating shaft 21. When the propeller assembly is in the deployed state, each blade 13 extends radially along the rotating shaft 21 to ensure the basic function of the propeller assembly. When the helicopter is in transport or other processes, the multiple blades 13 can be arranged in a staggered structure along the axial direction of the rotating shaft 21 and folded together on the same radial side of the rotating shaft 21, so that the propeller assembly is in a folded state that facilitates transport.

[0052] Specifically, such as Figures 1 to 3As shown, the propeller assembly also includes a base 22 and a hub 23 fitted onto the outer side of the rotating shaft 21. Along the axial direction of the rotating shaft 21, the hub 23 is located at the top of the base 22 away from the body 1. The hub 23 has multiple first mounting portions arranged circumferentially along the rotating shaft 21, and each blade 13 is correspondingly connected to a first mounting portion via a second mounting portion. More specifically, each first mounting portion includes a through hole 231 extending through the end of the hub 23 along the axial direction of the rotating shaft 21. The first mounting portion also includes a first mounting hole 232 formed on the outer side of the hub, extending radially along the rotating shaft 21. Correspondingly, the second mounting portion includes a mounting block 31 disposed in the through hole 231, with its top and bottom ends protruding from the top and bottom ends of the hub 23, respectively. The mounting block 31 has a second mounting hole 311 corresponding to the first mounting hole 232. Furthermore, both the top and bottom ends of the mounting block 31 have connecting holes.

[0053] Furthermore, the second assembly part also includes an assembly shaft 32, the first end of which has two limiting plates 321 extending toward the rotation shaft 21. The two limiting plates 321 are arranged radially along the assembly shaft 32, so that the two limiting plates 321 can be detachably connected (through corresponding connecting holes) to the top and bottom ends of the assembly block 31 protruding from the hub 23, respectively. Furthermore, the second assembly part is also connected to a fine-tuning mechanism 34, such as... Figures 1 to 2 As shown, the fine-tuning mechanism 34 is formed as a telescopic rod structure, with its two ends respectively hinged to the assembly shaft 32 and the base 22.

[0054] Thus, during the assembly of the blade 13, the blade 13 is first connected to the second assembly part to form an integral structure; then the assembly block 31 is placed in the corresponding through hole 231, and the top and bottom ends of the assembly block 31 protrude from the end face of the hub 23. Then, the blade 13 is connected to the assembly block 31 by the limiting plate 321. At this time, the through hole 231 and the connected limiting plate 321 and assembly block 31 form an interlocking structure. Then, the position of the assembly shaft 32 is adjusted by the fine-tuning mechanism 34 so that the first assembly hole 232 and the second assembly hole 311 are precisely aligned. Finally, the blade 13 and the hub 23 can be precisely and efficiently assembled by the corresponding connector.

[0055] In addition, such as Figures 1 to 3As shown, the second assembly part also includes a sleeve 33 fitted onto the outer side of the assembly shaft 32. A first extension platform 322 is formed around the outer side of the assembly shaft 32, and a second extension platform 331 corresponding to the first extension platform 322 is formed at the opening of the sleeve 33. Further, the first extension platform 322 has a plurality of first adjustment holes 3221 spaced apart circumferentially along the assembly shaft 32, and the second extension platform 331 has second adjustment holes 332 corresponding to the first adjustment holes 3221. The sleeve 33 is rotatable relative to the assembly shaft 32, so that the second adjustment holes 332 mate with different first adjustment holes 3221. The blade 13 is located at the end of the sleeve 33 away from the rotating shaft 21. Therefore, when the blade 13 needs to be folded, the connecting pieces in the first adjusting hole 3221 and the second adjusting hole 332 are first removed. Then, the sleeve 33 is rotated to adjust the tilt angle of the blade 13 relative to the horizontal plane (when the propeller is in the unfolded state, the blade 13 is parallel to the horizontal plane). When the blade 13 rotates to the preset angle, the second adjusting hole 332 is connected to the corresponding first adjusting hole 3221 via the connecting piece. This avoids interference between the blades 13 when folding.

[0056] like Figures 1 to 2 As shown, a mounting base 35 is fitted onto the end of the sleeve 33, and the mounting base 35 forms a first pivot portion 351 and a first locking portion 352. Correspondingly, the end of the blade 13 is provided with a structure corresponding to the mounting base 35, so that the blade 13 can be rotatably connected to the hub 23 through the first pivot portion 351 (the blade 13 is rotatably connected to the sleeve 33 through the first pivot portion 351, but the sleeve 33 and the hub 23 are in a locked state); in addition, the blade 13 is also detachably connected to the first locking portion 352. Thus, when the blade 13 is connected to the first locking portion 352, the blade 13 extends radially along the rotation axis 21, so that the propeller device is in the unfolded state; when the blade 13 is separated from the first locking portion 352, the blade 13 can rotate relative to the rotation axis 21 through the first pivot portion 351, so that the propeller device is in the folded state.

[0057] It should be noted that there are no restrictions on the specific structure of the first pivot part 351 and the first locking part 352. Existing pivot and locking structures can be used, as long as the above-mentioned technical effects can be achieved.

[0058] When the propeller assembly is in the folded state, such as Figures 4 to 5As shown, multiple rotor blades 13 can extend towards the tail of the fuselage 1 to be in a retracted state. In order to improve the stability and installation of the rotor blades 13 and avoid the rotor blades 13 scraping against surrounding objects in extreme environments such as strong winds, the helicopter also has a support device on the outer wall of the tail boom of the fuselage 1 (specifically the fixed section 11 of the tail boom). The support device includes multiple support members 4, each support member 4 forming a fixing part 433. The fixing part 433 can be connected to the rotor blades 13 to achieve support and fixation of the rotor blades 13.

[0059] In this embodiment, the support member 4 includes a telescopic positioning rod 41 and a support rod 42. The first end of the positioning rod 41 is inserted into the body 1. The first end of the support rod 42 is hinged to the positioning rod 41 (via a universal joint or other component), and the second end of the support rod 42 is provided with a fixing mechanism 43, which has a fixing part 433. By making the support rod 42 and the positioning rod 41 telescopic and hinged to the positioning rod 41, the support member 4 can be adapted to blades 13 with different folding angles. It should be noted that there is no limit to the number of support rods 42 in each support member 4; that is, this support device includes support members 4 with various structures, effectively increasing the applicability and flexibility of the support device.

[0060] like Figure 6 The support member 4 shown is provided with a support rod 42, which occupies a small space, so it is positioned between the fixed section 11 and the folding section 12 of the tail beam.

[0061] like Figure 7 The support member 4 shown has two support rods 42 (i.e., a main support rod 42 and a secondary support rod 42). The first ends of both rods are hinged to the positioning rod 41, and the second section of the secondary support rod 42 is hinged to the outer side of the main support rod 42 (via a hinge seat, etc.). The second end of the main support rod 42 is provided with the fixing mechanism 43. In this way, the positioning rod 41, the main support rod 42, and the secondary support rod 42 can provide a triangular support structure for the fixing mechanism 43, which has high stability. In addition, the hinge structure between the three can also ensure the flexibility of the support member 4.

[0062] like Figure 8 The support member 4 shown has four support members 4 (i.e., a combination of two sets of main support rods 42 and auxiliary support rods 42). The support member 4 can provide stable support for the two blades 13, effectively saving the space occupied by the support device.

[0063] Furthermore, in this embodiment, the support rod 42 achieves its telescopic function through a threaded connection, thus enabling it to connect with the fixing mechanism 43 to ensure the strong coherence of the overall structure of the support member 4. That is, the support rod 42 includes a fixed rod 421 and a correspondingly threaded lifting sleeve 422. The fixed rod 421 is hinged to the positioning rod 41, and the fixing mechanism 43 is correspondingly connected to the lifting sleeve 422.

[0064] In this embodiment, as Figures 9 to 10 As shown, the fixing mechanism 43 includes a lower jaw 432 and an upper jaw 431 that is movably connected to the lower jaw 432 via a movable component. The fixing mechanism 43 forms the fixing portion 433 between the upper jaw 431 and the lower jaw 432, and the fixing portion 433 is formed as a U-shaped open structure to facilitate clamping or releasing the blade 13. Specifically, the lower jaw 432 forms a cavity for assembling the movable component, which includes a drive shaft 4341 extending along the height direction of the lower jaw 432, and the drive shaft 4341 is rotatably connected to the lower jaw 432 via bearings or other components. In addition, the movable component also includes a moving block 4342, which is sleeved on the outer side of the drive shaft 4341 and screwed to the drive shaft 4341. Thus, when the drive shaft 4341 rotates relative to the lower jaw 432, the moving block 4342 can reciprocate along the extension direction of the drive shaft 4341.

[0065] like Figure 10 As shown, the end of the movable block 4342 has a slot 4343, which is a U-shaped open structure. The end of the upper gripper 431 has a limiting post 4311, which engages with the slot 4343. The upper gripper 431 is also hinged to the lower gripper 432 via a hinge shaft 4312. Thus, when the movable block 4342 reciprocates, the force can be transmitted to the limiting post 4311 through the slot 4343, thereby causing the upper gripper 431 to swing relative to the lower gripper 432 around the hinge shaft 4312. This achieves the technical effect of adjusting the opening angle of the fixing part 433. Furthermore, during the above process, the limiting post 4311 reciprocates along the extension direction of the slot 4343. Furthermore, the drive shaft 4341 is connected to the lifting sleeve 422 of the support rod 42, so that rotating the lifting sleeve 422 can drive the upper gripper 431 to swing accordingly.

[0066] In this embodiment, the lifting sleeve 422 is connected to the transmission shaft 4341 through an adjustment component, which can improve the flexibility and stability of the gripper assembly during application and expand the applicability of the gripper assembly.

[0067] Specifically, such as Figures 9 to 10As shown, the adjusting assembly includes an adjusting block 4353, which is specifically formed as a cross-shaped universal joint. Furthermore, the adjusting assembly also includes an upper transmission member 4351 and a lower transmission member 4352. The top end of the upper transmission member 4351 is fixed to the bottom end of the transmission shaft 4341, and the bottom end of the upper transmission member 4351 is rotatably connected to the adjusting block 4353. Similarly, the top end of the lower transmission member 4352 is rotatably connected to the adjusting block 4353, and the bottom end of the lower transmission member 4352 is fixedly connected to the lifting sleeve 422. More specifically, the adjusting assembly also includes an upper limit member 4361 and a lower limit member 4362. The upper limit member 4361 is fixedly connected to the bottom of the lower gripper 432, and the lower limit member 4362 is fixedly connected to the lifting sleeve 422. In addition, the adjusting assembly also includes a spring 4363, with both ends of the spring 4363 fixedly connected to the upper limit member 4361 and the lower limit member 4362, respectively.

[0068] When it is necessary to clamp the blade 13, the opening direction of the fixing part 433 can be adjusted according to the actual situation under the action of the adjusting component, so as to adjust the fixing part 433 to a clamping angle that is convenient. Then, the opening angle of the fixing part 433 can be increased by rotating the lifting sleeve 422, so as to facilitate the placement of the blade 13 into the fixing part 433. Then, the opening angle of the fixing part 433 can be reduced to a state that can clamp the blade 13. When it is necessary to release the blade 13, increasing the opening angle of the fixing part 433 can efficiently separate the fixing part 433 from the blade 13, and then the fixing mechanism 43 can be reset under the action of the spring 4363. In this way, the fixing mechanism 43 in this embodiment can achieve clamping of blades 13 of various specifications (or blades 13 at various positions).

[0069] In this embodiment, along the length of the body 1, the tail beam of the body 1 has a fixed section 11 and a folding section 12, and the aforementioned support device is correspondingly connected to the fixed section 11. Furthermore, as... Figure 11 As shown, the fixed section 11 and the folding section 12 are rotatably connected by the second pivot 51. When the tail beam is in the folded state, the fixed section 11 and the folding section 12 are locked by the second locking part 52 (at this time, the third locking part 53 described below is in the unlocked state). When the tail beam is in the closed state, the fixed section 11 and the folding section 12 are locked by the third locking part 53 (at this time, the second locking part 52 described above is in the unlocked state).

[0070] It should be noted that the specific structure of the second pivot part 51, the second locking part, and the third locking part is not limited. Existing pivot structures and existing locking structures can be used, as long as the above-mentioned technical effects can be achieved.

[0071] According to the helicopter with foldable blades as described above, both its tail boom and the rotor blades 13 are configured as foldable structures. When both the tail boom and the rotor blades 13 are in the folded state, the space occupied by the helicopter can be effectively reduced, thereby effectively improving the portability and transportation convenience of the helicopter. Furthermore, the helicopter is also provided with a support device, which can support and fix the folded rotor blades 13, effectively increasing the stability and safety of the rotor blades 13.

[0072] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be defined by the protection scope of the claims.

Claims

1. A helicopter with foldable rotor blades, characterized in that, The helicopter with foldable rotor blades includes: The fuselage features a foldable tail boom; A propeller assembly is rotatably connected to the body via a rotating shaft. The propeller assembly includes multiple blades. When the propeller assembly is in the deployed state, each blade extends radially along the rotating shaft. When the propeller assembly is in the folded state, the multiple blades are misaligned along the axial direction of the rotating shaft and converge to the same radial side of the rotating shaft. A support device is disposed on the outer wall of the machine body. The support device includes multiple support members, each of which has a fixing part. When the propeller device is in the folded state, the fixing part is connected to the propeller blade. The support member includes a telescopic positioning rod and a support rod. The first end of the positioning rod in the extension direction is inserted into the machine body. The first end of the support rod in the extension direction is hinged to the positioning rod. The second end of the support rod in the extension direction is provided with a fixing mechanism to form the fixing part. The fixing mechanism includes a lower gripper and an upper gripper rotatably connected to the lower gripper. The lower gripper and the upper gripper surround the fixing part, and the fixing part is formed as an open structure. The lower gripper is movably connected to the support rod, and the opening angle of the fixing part can be adjusted by the support rod. The lower gripper has a cavity for assembling a movable component. The movable component includes a drive shaft extending along the height direction of the lower gripper, which is rotatably connected to the lower gripper. The movable component also includes a movable block, which is sleeved on the outer side of the drive shaft and screwed to it. When the drive shaft rotates relative to the lower gripper, the movable block can reciprocate along the extension direction of the drive shaft. The end of the movable block has a slot, which is a U-shaped open structure. The end of the upper gripper has a limit post, which engages with the slot. The upper gripper is also hinged to the lower gripper via a hinge shaft. When the movable block reciprocates, it can transmit force to the limit post through the slot, thereby causing the upper gripper to swing relative to the lower gripper around the hinge shaft. The drive shaft is connected to the lifting sleeve of the support rod, and rotating the lifting sleeve can cause the upper gripper to swing accordingly. The propeller assembly also includes a base and a hub sleeved on the outer side of the rotating shaft; along the axial direction of the rotating shaft, the hub is located at the top of the base away from the body; The propeller hub has a plurality of first mounting portions arranged circumferentially along the rotation axis. Each first mounting portion includes a through hole extending through the end of the propeller hub along the axial direction of the rotation axis. The first mounting portion also includes a first mounting hole formed on the outer side of the propeller hub, which extends radially along the rotation axis. The blades are connected to the first assembly part in a one-to-one correspondence via the second assembly part; the second assembly part includes an assembly block and an assembly shaft; the assembly block is disposed in the through hole and forms a second assembly hole corresponding to the first assembly hole; the assembly shaft forms at least two limiting plates, and the two limiting plates are detachably connected to the assembly block at the top and bottom ends of the blade hub, respectively; the second assembly part also includes a sleeve sleeved on the outer side of the assembly shaft; a first extension platform is formed around the outer side of the assembly shaft, and a second extension platform corresponding to the first extension platform is formed at the opening of the sleeve; the first extension platform forms a plurality of first adjustment holes spaced apart circumferentially along the assembly shaft, and the second extension platform forms a second adjustment hole corresponding to the first adjustment hole; The sleeve is rotatable relative to the assembly shaft; the second assembly part is connected to a fine-tuning mechanism; the fine-tuning mechanism is formed as a telescopic rod structure, and its two ends are respectively hinged to the assembly shaft and the base.

2. The helicopter with foldable blades according to claim 1, characterized in that, The sleeve is provided with a mounting base at its end, and the mounting base forms a first pivot part and a first locking part; the blade is rotatably connected to the blade hub through the first pivot part, and the blade is detachably connected to the first locking part. When the blade is connected to the first locking part, the blade extends radially along the rotation axis so that the propeller device is in the unfolded state; when the blade is separated from the first locking part, the blade can rotate relative to the rotation axis through the first pivot part so that the propeller device is in the folded state.

3. The helicopter with foldable rotor blades according to claim 1, characterized in that, The number of support rods is one or more.

4. The helicopter with foldable blades according to claim 1, characterized in that, Along the length of the body, the tail beam of the body has a fixed section and a folding section, and the support device is connected to the fixed section.

5. The helicopter with foldable blades according to claim 4, characterized in that, The fixed section and the folding section are rotatably connected by a second pivot; when the tail beam is in the folded state, the fixed section and the folding section are locked by a second locking part; when the tail beam is in the closed state, the fixed section and the folding section are locked by a third locking part.

Images