EVTOL aircraft motor arm connecting structure

Abstract

The utility model discloses an eVTOL aircraft motor arm connecting structure which comprises a motor arm, a wing rear section and a tail crane, the motor arm is connected between the tail crane and the wing rear section, the motor arm comprises a motor arm body, the front end and the rear end of the motor arm body are connected with a motor arm front butt-joint frame and a motor arm rear butt-joint frame respectively, and the motor arm front butt-joint frame and the motor arm rear butt-joint frame are connected with the tail crane. A motor arm front opening cover and a motor arm rear opening cover are installed on the front side and the rear side of the motor arm body, the motor arm front butt joint frame is connected with the rear section of a wing, and the motor arm rear butt joint frame is connected with a tail crane. The structure is convenient to maintain, the binding face of the butt-joint frame is a plane, the motor arm, the rear section of the wing and the tail crane are in a plane binding state, no insertion structure is arranged, the motor arm can be detached after the connecting piece is detached in an external field, and maintenance is convenient; and the connection points of the butt joint frame are distributed in the circumferential direction, loads in all directions can be borne, and the connection reliability of the motor arm is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and in particular to an eVTOL aircraft motor arm connection structure. Background Art

[0002] The eVTOL (Electric Vertical Takeoff and Landing) electric vertical takeoff and landing aircraft uses an electric propulsion system instead of an internal combustion engine, which gives it many advantages and unique qualities. The most prominent advantages are energy saving and environmental protection, high efficiency and low energy consumption, while achieving near-zero emissions, very low noise and vibration levels, and good ride comfort. It is a truly environmentally friendly aircraft. In addition, it is safe and reliable (no explosion or fuel leakage), simple structure, easy operation and use, good maintainability / low cost, and good economy. There are also many advantages in design: the overall layout is flexible, and the optimal layout and unconventional / innovative layout can be adopted; aircraft with extraordinary performance can be designed to meet special purpose needs, etc.

[0003] The motor arm of the existing eVTOL aircraft is directly connected to the fuselage, wing, and tail structure to provide support for the motor arm and bear the lift transmitted back from the motor arm. Different components of the eVTOL aircraft will be damaged and impacted during flight and face replacement issues, and the cost of maintenance and replacement during operation needs to be reduced. Therefore, the motor arm of the eVTOL aircraft needs to be designed as a structure that is easy to disassemble and replace in the field to facilitate and quickly replace and repair the motor arm. The Chinese utility model patent with application number 202221785279.5 announced "an eVTOL aircraft motor arm connection structure", including a connector and a connecting plate, the connector including a front connector and a rear connector, the front connector is connected to the wing and the front motor arm by a fastener, the rear connector is connected to the wing and the rear motor arm by a fastener, and a connecting plate is connected between the front connector and the rear connector by a fastener, and the connecting plate spans the wing. The structure has a transition section between the motor arm and the wing, which is the motor arm connection structure. When the motor arm reaches the end of its life, only a single replacement part is needed, rather than the more expensive wing, which reduces maintenance costs. However, the structure adopts a plug-in structure, and the motor arm is inserted into the front and rear structures. When disassembling, the rear structure needs to be removed first before the motor arm can be disassembled. The disassembly process is very complex and requires tooling, which is not friendly to field maintenance. Utility Model Content

[0004] The purpose of the utility model is to provide an eVTOL aircraft motor arm connection structure to solve the problems mentioned in the background technology. To achieve the above purpose, the utility model provides the following technical solutions: an eVTOL aircraft motor arm connection structure, including a motor arm, a wing rear section, and a tail hanger, the motor arm is connected between the tail hanger and the wing rear section, the motor arm includes a motor arm body, the front and rear ends of the motor arm body are respectively connected to the motor arm front docking frame and the motor arm rear docking frame, the motor arm front cover and the motor arm rear cover are installed on the front and rear sides of the motor arm body, the motor arm front docking frame is connected to the wing rear section, and the motor arm rear docking frame is connected to the tail hanger.

[0005] Preferably, the wing rear section includes a wing rear section body, the rear end of the wing rear section body is connected to the wing rear section docking frame, a wing rear section cover is installed at the rear bottom of the wing rear section body, and the wing rear section docking frame is connected to the motor arm front docking frame through a connecting piece.

[0006] Preferably, the tail suspension comprises a tail suspension body, the upper side of the tail suspension body is connected to the tail suspension cover, the front ends of the tail suspension body and the tail suspension cover are connected to the tail suspension docking frame, and the tail suspension docking frame is connected to the motor arm rear docking frame through a connecting piece.

[0007] Preferably, the motor arm front docking frame, the motor arm rear docking frame, the wing rear section docking frame and the tail hanging docking frame are all annular structures, and a connecting boss is provided along the circumference thereof, reinforcing ribs are provided on both sides of the connecting boss, and a connecting hole is opened on the connecting boss.

[0008] Preferably, the connecting piece consists of a bolt, a nut and a gasket, and the nut is a locking nut.

[0009] The technical effects and advantages of the utility model are as follows: the structure is easy to maintain: the mating surface of the docking frame is a plane, the motor arm is in a plane-fitting state with the rear section of the wing and the tail hanger, and there is no plug-in structure. After the connector is removed in the field, the motor arm can be removed, which is easy to maintain;

[0010] High reliability: The connection points of the docking frame are distributed along the circumference and can withstand loads in all directions, ensuring the reliability of the motor arm connection;

[0011] High structural rigidity and strength: Reinforced ribs and bosses are designed at the connection points to ensure higher rigidity and strength of the connection area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an axonometric drawing of the utility model;

[0013] Figure 2 It is an exploded view of the utility model;

[0014] Figure 3It is an exploded view of the connection area between the motor arm and the rear section of the wing of the utility model;

[0015] Figure 4 This is an exploded view of the connection area between the motor arm and the tail crane of the utility model;

[0016] Figure 5 It is an axonometric view of the docking frame of the rear section of the wing of the utility model;

[0017] Figure 6 It is a cross-sectional view of the connecting piece of the utility model;

[0018] Figure 7 This is a schematic diagram of the position of the utility model on the eVTOL aircraft.

[0019] In the figure, 1. motor arm connection structure; 11. motor arm; 111. motor arm body; 112. motor arm front cover; 113. motor arm front docking frame; 114. motor arm rear cover; 115. motor arm rear docking frame; 116. connector; 1161. bolt; 1162. nut; 1163. gasket; 12. rear section of wing; 121. rear section of wing body; 122. rear section cover of wing; 123. rear section docking frame of wing; 1231. connecting boss; 1232. reinforcing rib; 13. tail suspension; 131. tail suspension body; 132. tail suspension cover; 133. tail suspension docking frame; 2. fuselage. DETAILED DESCRIPTION

[0020] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below in conjunction with specific diagrams. In the description of the utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection or a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components.

[0021] Example

[0022] like Figure 7 As shown, the motor arm connection structure 1 is designed between the wing and the tail, and the force on the motor is transmitted forward and backward to the wing and the tail through the motor arm connection structure 1, and they support each other. The power unit (motor and propeller) of the eVTOL aircraft 2 is installed on the motor arm connection structure 1, and the motor controller, high-voltage power harness, low-voltage control harness, thermal management system, etc. are inside, which often need maintenance, and the motor arm connection structure 1 needs to be easily disassembled.

[0023] like Figure 1 , Figure 2As shown, the motor arm connection structure 1 includes a motor arm 11, a wing rear section 12, and a tail hanging 13. The motor arm 11 is connected between the tail hanging 13 and the wing rear section 12, and is supported by the tail hanging 13 and the wing rear section 13. The motor arm 11 and the wing rear section 12, the motor arm 11 and the tail hanging 13 are detachable structures to meet the maintenance requirements of the motor arm 11.

[0024] like Figure 3 and Figure 4 As shown: the motor arm 11 includes a motor arm body 111, a motor arm front cover 112, a motor arm front docking frame 113, a motor arm rear cover 114, a motor arm rear docking frame 115, and a connecting piece 116. The motor arm body 111 bears the main load of the motor and is the main component of the motor arm 11; the motor arm front cover 112 and the motor arm rear cover 114 are installed on the front and rear sides of the motor arm body 111 to provide a passage for installing and disassembling the connecting piece 116 on the side of the motor arm 11; the motor arm front docking frame 113 and the motor arm rear docking frame 115 are the main load-bearing components of the connection, which are connected to the front and rear ends of the motor arm body 111 to transfer the load of the motor arm 11, and the motor arm front docking frame 113 and the motor arm rear docking frame 115 are respectively connected to the wing rear section 12 and the tail suspension 13 by a connecting piece 116.

[0025] The wing rear section 12 includes a wing rear section body 121, a wing rear section cover 122, and a wing rear section docking frame 123. The wing rear section docking frame 123 is connected to the motor arm front docking frame 113 through a connecting piece 116 to transfer the load on the motor arm 11 to the wing rear section 12; the wing rear section cover 122 is installed at the rear bottom of the wing rear section body 121 to provide a passage for installing and disassembling the connecting piece 116 on the side of the wing rear section 12; the rear end of the wing rear section body 121 is connected to the wing rear section docking frame 123 to transfer the load transferred from the motor arm 11 to the fuselage 2.

[0026] The tail suspension 13 includes a tail suspension body 131, a tail suspension cover 132, and a tail suspension docking frame 133. The tail suspension docking frame 133 is installed at the front end of the tail suspension body 131 and the tail suspension cover 132. The tail suspension docking frame 133 is connected to the motor arm rear docking frame 115 through a connector 116 to transfer the load on the motor arm 11 to the tail suspension 13; the tail suspension cover 132 is installed on the upper side of the tail suspension body 131 to provide a passage for installing and disassembling the connector 116 on the side of the tail suspension 13; the tail suspension body 131 transfers the load transferred from the motor arm 11 to the body 2.

[0027] The motor arm front docking frame, the motor arm rear docking frame, the wing rear section docking frame and the tail hanging docking frame are all annular structures, and a connecting boss is arranged along the circumference thereof. Reinforcing ribs are arranged on both sides of the connecting boss, and a connecting hole is opened on the connecting boss.

[0028] like Figure 5The rear section docking frame 123 of the wing is shown. The motor arm front docking frame 113, the motor arm rear docking frame 115 and the tail suspension docking frame 133 have similar structures, all of which are annular structures. The rear section docking frame 123 of the wing is machined from aluminum alloy, the preferred material is 7075, and the preferred heat treatment state is T7351. A connecting boss 1231 and a reinforcing rib 1232 are designed along the circumference thereof. The reinforcing rib 1232 is located on the side of the connecting boss 1231 to increase the rigidity of the connecting area and make the deformation of the connecting area smaller. The connecting boss 1231 increases the thickness of the connecting hole around it, reduces the stress around the connecting hole, and improves the safety of the connecting area.

[0029] like Figure 6 As shown, the connector 116 is composed of a bolt 1161, a nut 1162, and a gasket 1163. The connector 116 connects the motor arm front docking frame 113 and the wing rear section docking frame 123, the motor arm rear docking frame 115 and the tail hanging docking frame 133 together. It can be seen from the way that the motor arm 11 is in a plane fit with the wing rear section 12 and the tail hanging 13 in the up and down direction. When disassembling, the motor arm 11 can be taken out in the up and down direction. The nut 1162 is a locking nut, which cooperates with the bolt 1161 to prevent the connection from loosening. The gasket 1163 is cushioned between the docking frame and the nut 1162. When the nut 1162 is screwed during installation or disassembly, the nut 1162 is prevented from scratching the surface of the docking frame.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An eVTOL aircraft motor arm connection structure, comprising a motor arm, a wing rear section, and a tail hanger, characterized in that: The motor arm is connected between the tail crane and the rear section of the wing. The motor arm includes a motor arm body. The front and rear ends of the motor arm body are respectively connected to the motor arm front docking frame and the motor arm rear docking frame. The front and rear sides of the motor arm body are equipped with a motor arm front cover and a motor arm rear cover. The motor arm front docking frame is connected to the rear section of the wing, and the motor arm rear docking frame is connected to the tail crane.

2. The eVTOL aircraft motor arm connection structure according to claim 1, characterized in that: The wing rear section comprises a wing rear section body, the rear end of the wing rear section body is connected to the wing rear section docking frame, a wing rear section cover is installed at the rear bottom of the wing rear section body, and the wing rear section docking frame is connected to the motor arm front docking frame through a connecting piece.

3. The eVTOL aircraft motor arm connection structure according to claim 2, characterized in that: The tail suspension comprises a tail suspension body, the upper side of the tail suspension body is connected to the tail suspension cover, the front ends of the tail suspension body and the tail suspension cover are connected to the tail suspension docking frame, and the tail suspension docking frame is connected to the motor arm rear docking frame through a connecting piece.

4. The eVTOL aircraft motor arm connection structure according to claim 3, characterized in that: The motor arm front docking frame, the motor arm rear docking frame, the wing rear section docking frame and the tail hanging docking frame are all annular structures, and connecting bosses are arranged along the circumference thereof. Reinforcing ribs are arranged on both sides of the connecting bosses, and connecting holes are opened on the connecting bosses.

5. The eVTOL aircraft motor arm connection structure according to claim 4, characterized in that: The connecting piece is composed of a bolt, a nut and a gasket, and the nut is a locking nut.

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