Tandem electrically-driven unmanned helicopter frame

Abstract

The utility model provides a tandem electrically-driven unmanned helicopter rack. The tandem electrically-driven unmanned helicopter rack comprises main beams distributed in the longitudinal direction, transverse frames connected with the main beams and located on the transverse section of a machine shell, and auxiliary beams distributed in the longitudinal direction and connected with the transverse frames. The transverse frame is integrally arranged to be annular, and the transverse frame is connected with the main beam; the multiple auxiliary beams are sequentially connected with the transverse frame in the longitudinal direction, and different auxiliary beams are connected to different positions of the transverse frame. The weight of the whole machine frame is light, the longitudinal strength and the transverse strength can meet the requirements, the machine frame is particularly suitable for the unmanned helicopter with the large longitudinal size, in addition, the annular arrangement of the transverse frame enables the cross section of the machine shell to be arranged in a circular mode, the arrangement mode is suitable for the electrically-driven unmanned helicopter, and the machine frame is suitable for the unmanned helicopter with the large longitudinal size. The motor can be fully arranged under the condition that the size is not large, the structural compactness is improved, and the weight can be further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to unmanned plane technical field, especially a tandem electric drive unmanned helicopter frame. BACKGROUND

[0002] The unmanned plane is the unmanned aircraft that uses radio remote control equipment and self -provided program control system to manipulate, along with the development of unmanned plane technology, the unmanned plane embodies the indispensable function in the aerial photography, detection, stability, investigation, rescue, plant protection etc., whether in the civil field or the military field occupies the extremely important position. The unmanned helicopter is a kind of unmanned plane, it is provided with rotor and can vertically lift. Along with the continuous promotion of unmanned helicopter load demand, the size of unmanned helicopter is also bigger and bigger. The current common single-rotor unmanned helicopter load weight promotion is relatively difficult, and the multi-rotor tandem unmanned helicopter has greater load capacity, but its frame structure is larger. Therefore, optimizing the frame can significantly improve the load capacity of the unmanned helicopter. In addition, for the multi-rotor tandem unmanned helicopter, such as double-rotor tandem unmanned helicopter, because the two groups of rotors of itself will reverse, the counter-torque interacts on the frame, which causes the frame to be easily twisted and deformed, so the frame structure needs strong torsional resistance. SUMMARY

[0003] The utility model aims at the insufficient in the above background art, provide a kind of relatively light, and flexible assembly, control convenient multi-rotor tandem unmanned helicopter frame.

[0004] In order to achieve the above purpose, the utility model provides a kind of tandem electric drive unmanned helicopter frame, including the main beam that distributes along longitudinal direction, the cross frame that is connected with the main beam and is located on the cross section of shell, and the vice beam that distributes along longitudinal direction and is connected each cross frame;

[0005] The both ends of the main beam are provided with rotor mounting seat, and the rotor mounting seat is used for installing rotor;

[0006] The cross frame is provided as a whole annular, and the cross frame is connected with the main beam;

[0007] The vice beam is provided with multiple, the vice beam is sequentially connected the cross frame along longitudinal direction, and different vice beams are connected at different positions of the cross frame, and the number and connection position of the vice beam can be selected;

[0008] The center position of the vice beam is equipped with motor, and the parallel position of the main beam is provided with main shaft, the motor is drivingly connected with the main shaft, and the both ends of the main shaft are drivingly connected with the rotor mounting seat.

[0009] Further, the main beam is provided with two along longitudinal direction parallel.

[0010] Further, the cross frames are uniformly spaced along the longitudinal direction, and the cross frames are connected to the main beams through connecting plates with through holes and bolts.

[0011] Further, a plurality of mounting holes are formed in the cross frames, and the auxiliary beams are arranged in the corresponding mounting holes through mounting sleeves.

[0012] Further, the auxiliary beams are symmetrically arranged left and right.

[0013] Further, the auxiliary beams symmetrically arranged left and right are connected through connecting rods at both ends.

[0014] Further, a plurality of support frames are connected to the main beams, the support frames are provided with bearings, the main shafts are arranged in the bearings, and the bearings support the rotation of the main shafts.

[0015] Further, the support frames are equidistantly arranged along the longitudinal direction and staggered with the cross frames.

[0016] Further, the main beams, the cross frames and the auxiliary beams are all made of profiles.

[0017] Further, the main beams are made of rectangular profiles, the cross frames are made of T-shaped profiles, and the auxiliary beams are made of circular tubes.

[0018] The above scheme of the utility model has the following beneficial effects:

[0019] The tandem electrically-driven unmanned helicopter frame provided by the utility model has the following advantages: the main beams, the cross frames and the auxiliary beams are arranged, so that the weight of the whole frame is light, the longitudinal and transverse strengths can meet the requirements, and the frame is especially suitable for unmanned helicopters with large longitudinal dimensions; in addition, the annular arrangement of the cross frames enables the cross section of the frame to be circular, which is suitable for electrically-driven unmanned helicopters, can fully arrange the motors without increasing the size, improves the compactness of the structure, and further reduces the weight.

[0020] Other advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is an enlarged view of A in Figure 1

[0023] Figure 3 It is a schematic diagram of the overall structure of the utility model including the frame.

[0024] REFERENCE SIGNS​

[0025] 1 - main beam; 2 - cross frame; 3 - sub-beam; 4 - rotor mounting seat; 5 - connecting plate; 6 - machine shell; 7 - mounting hole; 8 - mounting sleeve; 9 - connecting rod; 10 - motor; 11 - support frame; 12 - bearing. DETAILED DESCRIPTION

[0026] To make the technical problems, technical solutions and advantages to be solved by the present application clearer, the following will be described in detail in conjunction with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0027] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be a locking connection, or it can be a detachable connection, or it can be integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] As Figures 1-3As shown, an embodiment of this utility model provides a tandem electrically driven unmanned helicopter frame, including a main beam 1 distributed longitudinally, crossbeams 2 connected to the main beam 1 and located on each cross section, and secondary beams 3 distributed longitudinally and connecting each crossbeam 2. Two main beams 1 are arranged parallel to each other longitudinally, serving as the main components of the entire frame. They resist bending moments when the unmanned helicopter is under load, and also resist torques when the two sets of rotors reverse each other. Therefore, the profile dimensions of the main beam 1 are relatively large to enhance its load-bearing capacity. Rotor mounting seats 4 are provided at both ends of the main beam 1. The two rotor mounting seats 4 are used to install the two sets of rotors, mainly for installing and supporting the rotation shafts and transmission structures (including bevel gear sets, etc.) of the two sets of rotors.

[0030] In this embodiment, the crossbeams 2 are evenly spaced along the longitudinal direction, and the crossbeams 2 are generally arranged in a ring shape. The crossbeams 2 and the main beam 1 are connected by connecting plates 5 with through holes and bolts (welding is also an option). Since the crossbeams 2 do not bear bending moments and torques as the main components, their profile design dimensions can be relatively small. The crossbeams 2 serve to enhance the support strength of the housing 6 at the corresponding cross section position, and also serve to connect the secondary beams 3, so that the main beam 1, crossbeams 2 and secondary beams 3 are connected as a whole.

[0031] In this embodiment, multiple secondary beams 3 are provided and installed at different positions with the crossbeam 2. The crossbeam 2 has mounting holes 7. The secondary beams 3 and mounting sleeves 8 are fixedly connected by means of interference fit or other methods. The mounting sleeves 8 are inserted into the mounting holes 7 and fixedly connected to the secondary beams 3 by bolts (or welding).

[0032] In a preferred embodiment, multiple mounting holes 7 are provided on the crossbeam 2 and evenly distributed along the annular crossbeam 2. The sub-beams 3 can be selectively positioned at different mounting hole 7 locations, and the number of sub-beams 3 can also be adjusted. Therefore, selection can be made based on the unmanned helicopter's load capacity, strength, etc., achieving flexible allocation. Sub-beams 3 can also be added or removed later. Of course, to make the weight distribution of the unmanned helicopter more even, sub-beams 3 are usually added symmetrically on the left and right sides of the frame.

[0033] As a further improvement, in this embodiment, both ends of the symmetrical sub-beams 3 are connected by connecting rods 9 to further enhance the overall stability of the sub-beams 3 and the crossbeams 2, while preventing the sub-beams 3 from becoming loose. Additionally, the number and installation position of the crossbeams 2 can also be adjusted.

[0034] It should be noted that in this embodiment, the motor 10 of the tandem electric-driven unmanned helicopter is installed at the center of the frame and connected to the sub-beam 3 via a motor frame (not shown in the figure). The main shaft (not shown in the figure) is located between two parallel main beams 1 at the same height as the main beams 1, so that both ends of the main shaft can be smoothly connected to the rotor mounting seats 4 at both ends of the main beams 1. The motor 10 is connected to the main shaft via a transmission structure at the center of the main shaft. Due to the relatively large length of the frame, in order to make the main shaft transmission more stable, multiple support frames 11 are provided between the two main beams 1 in this embodiment. Bearings 12 are provided on the support frames 11, and the main shaft passes through the bearings 12, which support the rotation of the main shaft. The support frames 11 are distributed at equal intervals along the longitudinal direction, similar to the crossbeams 2, and are staggered from the crossbeams 2.

[0035] As mentioned earlier, in this embodiment, the main beam 1, crossbeam 2, and sub-beam 3 are all made of profiles, making material sourcing convenient. In a specific example of this embodiment, the main beam 1 uses a rectangular profile with a relatively large design size. The crossbeam 2 uses a T-shaped profile with a smaller design size, and the mounting holes 7 are located on the web of the T-shaped profile, which further reduces the weight of the crossbeam 2. The sub-beam 3 uses a circular tube with a relatively small design size. Therefore, the overall frame is lightweight, while both longitudinal and transverse strength meet the requirements, making it particularly suitable for unmanned helicopters with a large longitudinal dimension. Of course, in other embodiments, other types of profiles can be used instead, such as using an I-beam for the main beam 1.

[0036] It should be noted that in this embodiment, a landing gear is also provided at the bottom of the housing 6. The landing gear is detachably connected to the housing 6 or the frame. It can adopt a form commonly used in the prior art and is not shown in the figure.

[0037] It is worth mentioning that the cross frame 2 of the tandem electric-driven unmanned helicopter frame provided in this embodiment adopts this annular arrangement so that the cross-section of the fuselage 6 can also be circular. This arrangement is suitable for electric-driven unmanned helicopters, which can fully arrange motors 10 and the like in a small size, improve the structural compactness, and further reduce the weight.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A tandem electrically driven unmanned helicopter airframe, characterized in that, The main beam is longitudinally distributed, the cross beam is connected with the main beam and located on the cross section of the shell, and the auxiliary beam is longitudinally distributed and connected with each cross beam; Both ends of the main beam are provided with a rotor mounting seat for mounting a rotor; The cross beam is annular as a whole and is connected with the main beam; A plurality of auxiliary beams are provided, the auxiliary beams are sequentially connected with the cross beams in the longitudinal direction, and different auxiliary beams are connected at different positions of the cross beams, and the number and connection positions of the auxiliary beams can be selected; A motor is mounted at the central position of the auxiliary beam, a main shaft is provided at the parallel position of the main beam, the motor is in transmission connection with the main shaft, and both ends of the main shaft are in transmission connection with the rotor mounting seat.

2. The tandem electrically driven unmanned helicopter airframe of claim 1, wherein, Two main beams are longitudinally and parallel arranged.

3. The tandem electrically driven unmanned helicopter airframe of claim 1, wherein, The cross beams are uniformly and longitudinally spaced, and the cross beams are connected with the main beam through a connecting plate with a through hole and a bolt.

4. The tandem electrically driven unmanned helicopter airframe of claim 1, wherein, A plurality of mounting holes are formed in the cross beam, and the auxiliary beam is arranged in the corresponding mounting hole through a mounting sleeve.

5. The tandem electrically driven unmanned helicopter airframe of claim 1, wherein, The auxiliary beam is symmetrically distributed left and right.

6. The tandem electrically driven unmanned helicopter airframe of claim 1, wherein, Both ends of the auxiliary beam symmetrically distributed left and right are connected through a connecting rod.

7. The tandem electrically driven unmanned helicopter airframe of claim 1, wherein, The main beam is connected with a plurality of support frames, the support frames are provided with bearings, the main shaft is arranged in the bearings, and the bearings support the rotation of the main shaft.

8. The tandem electrically driven unmanned helicopter airframe of claim 7, wherein, The support frames are longitudinally and equidistantly distributed and staggered with the cross beams.

9. The tandem electrically-driven unmanned helicopter airframe according to any one of claims 1-8, characterized in that, The main beam, the cross beam and the auxiliary beam are all made of a profile.

10. The tandem electrically-driven unmanned helicopter airframe according to claim 9, characterized in that, The main beam is made of a rectangular profile, the cross beam is made of a T-shaped profile, and the auxiliary beam is made of a circular tube.

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