Arm device and rotorcraft

Abstract

An embodiment of the present invention provides an arm device and a rotorcraft, belonging to the field of aircraft technology. The arm device includes an arm base, a motor base, a first fixing member, and a second fixing member. The arm base is used to connect to the fuselage of the rotorcraft. The arm base includes a first mounting portion and a second mounting portion that are arranged opposite to each other. The first mounting portion is provided with a first mounting hole. A gap is provided between the first mounting portion and the second mounting portion. The motor base is used to install a power unit, and a fixing hole is provided on the motor base. The first fixing member passes through the first mounting hole and the fixing hole in sequence, and the first fixing member is connected to the second mounting portion. The second fixing member is connected in cooperation with the first fixing member so that the motor base is fixedly installed in the gap. The motor base is stably and firmly installed on the arm base through the cooperation of the first fixing member and the second fixing member, thereby making the flight of the rotorcraft safer.

Description

Technical Field

[0001] The present invention relates to the field of aircraft, and in particular to an arm device and a rotorcraft. Background Art

[0002] A multirotor aircraft is a specialized unmanned helicopter with three or more rotor shafts. The electric motors on each shaft drive the rotors, generating lift and thrust. The collective pitch of the rotors is fixed, unlike the variable pitch of conventional helicopters. By varying the relative speed of the rotors, the propulsion force on each shaft can be altered, thereby controlling the aircraft's trajectory.

[0003] With the development of rotorcraft technology, people can use rotorcraft to complete many tasks, such as spraying fire extinguishing fluid in forest fires, aerial photography, power inspections, environmental monitoring, and disaster inspections.

[0004] In the prior art, the motor mount of a rotorcraft is not securely fixed and may easily cause the aircraft to explode. Summary of the Invention

[0005] An object of the present invention is to provide an arm device and a rotorcraft, which can improve the installation stability of a motor base.

[0006] The embodiment of the present invention is achieved as follows:

[0007] In a first aspect, the present invention provides an arm device, comprising an arm base, a motor base, a first fixing member and a second fixing member; the arm base is used to be connected to the fuselage of a rotorcraft, and the arm base comprises a first mounting portion and a second mounting portion arranged opposite to each other, the first mounting portion is provided with a first mounting hole, and a gap is provided between the first mounting portion and the second mounting portion; the motor base is used to install a power device, and a fixing hole is provided on the motor base; the first fixing member passes through the first mounting hole and the fixing hole in sequence, and the second fixing member cooperates with the first fixing member to fix the motor base in the gap.

[0008] In an optional embodiment, the second mounting portion is provided with a second mounting hole, and the first fixing member and / or the second fixing member is passed through the second mounting hole.

[0009] In an optional embodiment, the first fixing member includes a first limiting portion and a first connecting portion connected to each other, the second fixing member includes a second limiting portion and a second connecting portion connected to each other, the first connecting portion passes through the first mounting hole, the fixing hole and the second mounting hole in sequence, the first limiting portion abuts against the outer side wall of the first mounting portion, the second connecting portion is detachably connected to the first connecting portion, and the second limiting portion abuts against the outer side wall of the second mounting portion.

[0010] In an optional embodiment, the first connecting portion and the second connecting portion are threadedly engaged.

[0011] In an optional embodiment, the arm device includes a shock absorber, which is mounted on the first fixing member and / or the second fixing member, and the shock absorber is in contact with the motor base to reduce vibration of the motor base.

[0012] In an optional embodiment, the motor base includes a mating portion, the mating portion includes a first side wall and a second side wall arranged opposite to each other; the fixing hole passes through the first side wall and the second side wall; the shock absorber includes a first shock absorber and a second shock absorber; the first shock absorber is provided with a first through hole, and the first shock absorber is mounted on the first fixing member through the first through hole; one end of the first shock absorber is abutted against the first side wall, and the other end is abutted against the first mounting portion; the second shock absorber is provided with a second through hole, and the second shock absorber is mounted on the first fixing member or the second fixing member through the second through hole; one end of the second shock absorber is abutted against the second side wall, and the other end is abutted against the second mounting portion.

[0013] In an optional embodiment, the fixing hole includes a first part and a second part, and the first part and the second part are respectively located at two ends of the fixing hole; one end portion of the first shock absorber extends into the first part so that the outer wall of the first shock absorber abuts against the inner wall of the fixing hole; the second shock absorber partially extends into the second part so that the outer wall of the second shock absorber abuts against the inner wall of the fixing hole.

[0014] In an optional embodiment, the aperture of the first part gradually increases in the direction away from the second part, the first shock absorber includes a first section and a second section connected in sequence, the diameter of the first section gradually decreases in the direction away from the second section, the first section at least partially extends into the first part, and the outer side wall of the first section abuts against the inner wall of the first part, and the second section abuts against the first mounting portion; the aperture of the second part gradually increases in the direction away from the first part, the second shock absorber includes a third section and a fourth section connected in sequence, the diameter of the third section gradually decreases in the direction away from the fourth section, the third section at least partially extends into the second part, and the outer side wall of the third section abuts against the inner wall of the second part, and the fourth section abuts against the second mounting portion.

[0015] In an optional embodiment, the first shock absorber is partially installed in the first mounting hole, and the outer wall of the first shock absorber abuts against the inner wall of the first mounting hole; the second shock absorber is partially installed in the second mounting hole, and the outer wall of the second shock absorber abuts against the inner wall of the second mounting hole.

[0016] In an optional embodiment, a first limit platform is provided on the first shock absorber, the first fixing member includes a first limit portion and a first connecting portion, the first connecting portion passes through the first mounting hole and the fixing hole in sequence and is connected to the second fixing member, the first limit platform is abutted against the outer side wall of the first mounting portion, and the first limit portion is abutted against the first limit platform; a second limit platform is provided on the second shock absorber, the second fixing member includes a second limit portion and a second connecting portion, the second connecting portion is connected to the first connecting portion, the second limit platform is abutted against the outer side wall of the second mounting portion, and the second limit portion is abutted against the second limit platform.

[0017] In an optional embodiment, the fitting is a metal sleeve, which is installed in the fixing hole, one end of the metal sleeve forms the first side wall, and the other end of the metal sleeve forms the second side wall.

[0018] In an optional embodiment, the number of the first fixing members includes at least two, the number of the second fixing members includes at least two, the first mounting portion is provided with at least two first mounting holes, the motor seat is provided with at least two fixing holes, the number of the first shock absorbers includes at least two, and the number of the second shock absorbers includes at least two; the first fixing members are installed in a one-to-one correspondence with the first mounting holes and the fixing holes, and the second fixing members are installed in a one-to-one correspondence with the first fixing members; the first shock absorbers are installed in a one-to-one correspondence with the first fixing members, and the second shock absorbers are installed in a one-to-one correspondence with the first fixing members.

[0019] In an optional embodiment, the arm device of the rotorcraft includes a connecting rod, a connecting hole is provided on the arm seat, one end of the connecting rod is installed in the connecting hole, and the other end is used to be connected to the fuselage.

[0020] In a second aspect, the present invention provides a rotorcraft, comprising a fuselage and the arm device according to any one of the aforementioned embodiments, wherein the arm seat is mounted on the fuselage.

[0021] The embodiments of the present invention provide an arm device and a rotorcraft, which have the following beneficial effects:

[0022] The present application provides a first mounting portion and a second mounting portion on the arm base, so that a gap is formed between the first mounting portion and the second mounting portion, and the motor base is fixedly mounted in the gap. The limitation of the gap makes the fixation of the motor base more stable. A first mounting hole is provided on the first mounting portion, a fixing hole is opened on the motor base, a first fixing member is sequentially passed through the first mounting hole and the fixing hole, and then the second fixing member is used to cooperate with the first fixing member to fix the motor base in the gap between the first mounting portion and the second mounting portion. Since the first fixing member is passed through the first mounting hole and the fixing hole and is connected to the second mounting portion, the connection between the motor base and the arm base is simpler and more stable, thereby avoiding crashes and explosions caused by unreliable fixation of the motor base. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of a rotorcraft provided in an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of an arm device provided by an embodiment of the present invention;

[0026] Figure 3 A schematic cross-sectional view of the structure of an arm device provided by an embodiment of the present invention;

[0027] Figure 4 for Figure 3 A partial schematic diagram in ;

[0028] Figure 5 A schematic structural diagram of an arm mount provided in an embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of a motor base provided by an embodiment of the present invention;

[0030] Figure 7 A schematic cross-sectional view of a motor base structure provided by an embodiment of the present invention;

[0031] Figure 8 A schematic structural diagram of a first shock-absorbing member provided in an embodiment of the present invention;

[0032] Figure 9 This is a schematic structural diagram of the second shock-absorbing component provided in an embodiment of the present invention.

[0033] Icons: 100-arm assembly; 110-arm seat; 111-first mounting portion; 113-second mounting portion; 115-gap; 117-first mounting hole; 119-connecting hole; 121-second mounting hole; 123-first seat; 125-second seat; 127-first groove; 129-second groove; 130-motor seat; 131-first side wall; 132-matching portion; 133-second side wall; 135-fixing hole; 137-first part; 139-second part; 141-metal sleeve; 143-support platform; 145-fixing portion; 147-third part; 151-first fixing member ;153-second fixing member;155-first limiting part;157-first connecting part;159-second limiting part;161-second connecting part;162-threaded hole;170-shock absorber;171-first shock absorber;173-second shock absorber;175-first through hole;177-second through hole;179-first limiting platform;181-second limiting platform;183-first section;185-second section;187-third section;189-fourth section;190-connecting rod;200-power unit;210-motor;230-propeller;250-electric speed controller;300-rotorcraft;310-fuselage. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0039] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] Please refer to Figure 1 This embodiment provides a rotorcraft 300, including a fuselage 310 and a plurality of arm devices 100 mounted on the fuselage 310. The arm devices 100 are distributed on both sides of the fuselage 310 and are used to provide lift when the rotorcraft 300 is flying.

[0041] In this embodiment, the rotorcraft 300 is a quadrotor 300. The quadrotor 300 includes four arm devices 100. The four arm devices 100 are evenly distributed on both sides of the fuselage 310.

[0042] In other embodiments of the present application, the rotorcraft 300 may also be a three-rotor aircraft 300 or a multi-rotor aircraft 300. It is understood that the present embodiment does not limit the number of the arm devices 100, which may be increased or decreased according to design requirements.

[0043] In this embodiment, rotorcraft 300 also includes landing gear, a battery, an electronic control module, and an antenna. The landing gear is fixed below fuselage 310 to ensure stability during takeoff and landing. A spraying system is located below fuselage 310 and is used to spray pesticides or irrigate crops during operation. The battery is fixed to fuselage 310 to provide power. The electronic control module is also fixed to fuselage 310 to control the aircraft's flight posture, and the antenna is used to communicate with external terminals.

[0044] In this embodiment, the rotorcraft 300 further includes a spraying system, which is installed on the fuselage 310 and is used for operations such as spraying pesticides or irrigating crops in the farming industry.

[0045] In other embodiments of the present application, the rotorcraft 300 can also be used for seed sowing, spraying fire extinguishing fluid during forest fires, aerial photography, power inspections, environmental monitoring, forest fire prevention, and disaster inspections. Different mounts can be installed based on different usage scenarios and purposes. For example, a gimbal can be installed as a mount for aerial photography.

[0046] Please refer to Figure 1 、 Figure 2 and Figure 3 In this embodiment, the arm device 100 includes an arm base 110, a motor base 130, a first fixing member 151 and a second fixing member 153. The arm base 110 is connected to the fuselage 310. The arm base 110 includes a first mounting portion 111 and a second mounting portion 113 arranged opposite to each other. The first mounting portion 111 is provided with a first mounting hole 117. A gap 115 is provided between the first mounting portion 111 and the second mounting portion 113. The motor base 130 is used to install the power device 200, and a fixing hole 135 is provided on the motor base 130. The first fixing member 151 passes through the first mounting hole 117 and the fixing hole 135 in sequence. The second fixing member 153 is connected in cooperation with the first fixing member 151 so that the motor base 130 is fixedly installed in the gap 115.

[0047] The present application provides a first mounting portion 111 and a second mounting portion 113 on the arm base 110, thereby forming a gap 115 between the first mounting portion 111 and the second mounting portion 113. The motor base 130 is fixedly mounted within the gap 115, and the gap 115 restricts the motor base 130. A first mounting hole 117 is provided on the first mounting portion 111, and a fixing hole 135 is provided on the motor base 130. A first fixing member 151 is sequentially passed through the first mounting hole 117 and the fixing hole 135, and then a second fixing member 153 cooperates with the first fixing member 151 to securely mount the motor base 130 in the gap 115 between the first mounting portion 111 and the second mounting portion 113. Because the first fixing member 151 passes through the first mounting hole 117 and the fixing hole 135 and is connected to the second mounting portion 113, the motor base 130 is more easily mounted on the arm base 110 and the connection is more stable, thereby avoiding crashes and explosions caused by insecure fixation of the motor base 130.

[0048] See also Figure 1 and Figure 5 In this embodiment, the arm mount 110 includes a first mount portion 123 and a second mount portion 125. The second mount portion 125 is protruded from one side of the first mount portion 123. The first mounting portion 111 and the second mounting portion 113 are protruded from the top wall of the first mount portion 123 and are arranged parallel to each other. The second mount portion 125 is connected to the fuselage 310.

[0049] Please refer to Figure 1 、 Figure 2 and Figure 5 In this embodiment, the arm assembly 100 further includes a connecting rod 190 , and a connecting hole 119 is provided on the side wall of the second seat portion 125 . One end of the connecting rod 190 is fixedly mounted in the connecting hole 119 , and the other end is connected to the fuselage 310 .

[0050] In this embodiment, the connecting rod 190 is an aluminum alloy tube wrapped with carbon fiber material. In other embodiments of the present application, the connecting rod 190 can also be a plastic tube made of plastic or a carbon tube made of carbon fiber material.

[0051] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 6In this embodiment, the arm device 100 further includes a power device 200. The motor base 130 is used for connection to connect the power device 200 to the arm base 110. A support platform 143 is formed on the top of the motor base 130, and the power device 200 is mounted on the support platform 143. A fixing portion 145 matching the gap 115 is formed on the bottom of the motor base 130, and a fixing hole 135 is opened in the fixing portion 145. When the motor base 130 is installed on the arm base 110, the fixing portion 145 is partially located in the gap 115, and the support platform 143 is located on top of the first mounting portion 111 and the second mounting portion 113.

[0052] Please refer to Figure 3 and Figure 4 In this embodiment, the second mounting portion 113 defines a second mounting hole 121, and the first fixing member 151 is disposed through the second mounting hole 121. By providing the second mounting hole 121 on the second mounting portion 113 and allowing the first fixing member 151 to sequentially penetrate the first mounting hole 117, the fixing hole 135, and the second mounting hole 121, the motor base 130 is connected to both the first mounting portion 111 and the second mounting portion 113 via the first fixing member 151, further improving the stability of the connection between the motor base 130 and the arm base 110.

[0053] Please refer to Figure 3 and Figure 4 In this embodiment, the first fixing member 151 includes a first limiting portion 155 and a first connecting portion 157. The second fixing member 153 includes a second limiting portion 159 and a second connecting portion 161. The first connecting portion 157 passes through the first mounting hole 117, the fixing hole 135, and the second mounting hole 121 in sequence. The first limiting portion 155 abuts against the outer wall of the first mounting portion 111. The second connecting portion 161 passes through the second mounting hole 121, and the second connecting portion 161 is detachably connected to the first connecting portion 157, and the second limiting portion 159 abuts against the outer wall of the second mounting portion 113. The first limiting portion 155 and the second limiting portion 159 are provided so that the first fixing member 151 and the second fixing member 153 form a clamping force after being matched and connected, thereby stably clamping the motor base 130 in the gap 115.

[0054] In some other embodiments of the present application, the second fixing member 153 can also be arranged outside the second mounting hole 121. For example, the first fixing member 151 is a bolt and the second fixing member 153 is a nut. The end of the bolt passes through the first mounting hole 117, the fixing hole 135 and the second mounting hole 121 in sequence, and extends out of the outer wall of the second mounting portion 113, and the nut is installed on the protruding part of the bolt. The first fixing member 151 can also be a shaft, and the second fixing member 153 can also be a pin. By providing a pin hole on the shaft and inserting the pin into the pin hole, the shaft is fixed in the first mounting hole 117, the fixing hole 135 and the second mounting hole 121. It can be understood that this embodiment does not limit the specific structure of the first fixing member 151 and the second fixing member 153, as long as the second fixing member 153 can fix the first fixing member 151 in the first mounting hole 117, the fixing hole 135 and the second mounting hole 121.

[0055] In other embodiments of the present application, the second fixing member 153 may also be disposed in the second mounting hole 121 or sequentially passed through the second mounting hole 121 and the fixing hole 135 to cooperate with and connect to the first fixing member 151. It will be understood that in this embodiment, it is sufficient to ensure that the entire assembly consisting of the first fixing member 151 and the second fixing member 153 passes through the first mounting hole 117, the fixing hole 135, and the second mounting hole 121.

[0056] Please refer to Figure 3 and Figure 4 In this embodiment, a threaded hole 162 is provided at one end of the first connecting portion 157 away from the first limiting portion 155, and a threaded hole 162 is provided on the sidewall of the second connecting portion 161. The second connecting portion 161 is threadedly mounted in the threaded hole 162 of the first connecting portion 157. The threaded connection between the first connecting portion 157 and the second connecting portion 161 facilitates removal and installation.

[0057] Please refer to Figure 3 and Figure 4 In this embodiment, the arm assembly 100 includes a shock absorber 170, which is mounted on the first fixing member 151 and abuts against the motor base 130 to reduce vibration of the motor base 130. The provision of the shock absorber 170 can reduce vibration and absorb energy of the motor base 130, thereby preventing vibration generated by the movement of the power unit 200 from being transmitted to the fuselage 310 and affecting the normal flight of the rotorcraft 300.

[0058] Please refer to Figure 3 、 Figure 4 、 Figure 7 and Figure 8In this embodiment, the motor base 130 includes a mating portion 132, and the mating portion 132 includes a first side wall 131 and a second side wall 133 arranged opposite to each other. The fixing hole 135 passes through the first side wall 131 and the second side wall 133. The shock absorber 170 includes a first shock absorber 171. A first through hole 175 is provided on the first shock absorber 171, and the first shock absorber 171 is sleeved on the first fixing member 151 through the through hole. One end of the first shock absorber 171 is abutted against the first side wall 131, and the other end is connected to the first mounting portion 111. By arranging the first shock absorber 171 between the first mounting portion 111 and the first side wall 131, it is possible to prevent the motor base 130 from transmitting vibration to the first mounting portion 111.

[0059] In this embodiment, the first shock absorber 171 partially extends into the fixing hole 135, and the outer wall of the extended portion of the first shock absorber 171 abuts against the inner wall of the fixing hole 135. By allowing the first shock absorber 171 to extend into the fixing hole 135 so that the outer wall of the first shock absorber 171 abuts against the inner wall of the fixing hole 135, the inner wall of the fixing hole 135 contacts the first shock absorber 171, thereby limiting the vertical vibration of the motor base 130.

[0060] Please refer to Figures 3 to 9 In this embodiment, the fixing hole 135 includes a first portion 137 and a second portion 139. The first portion 137 and the second portion 139 are located at opposite ends of the fixing hole 135. The diameter of the first portion 137 gradually increases as it moves away from the second portion 139, forming a bell-shaped shape. The first shock absorber 171 includes a first section 183 and a second section 185 connected in sequence. The diameter of the first section 183 gradually decreases as it moves away from the second section 185. The first section 183 at least partially extends into the first portion 137, and the outer wall of the first section 183 abuts the inner wall of the first section 137. The second section 185 abuts the first mounting portion 111. The gradually decreasing diameter of the first section 183 as it moves away from the second section 185 and the gradually increasing diameter of the first section 137 as it moves away from the second section 139 increase the contact area between the first shock absorber 171 and the inner wall of the fixing hole 135, thereby improving the shock absorption effect.

[0061] In this embodiment, the first section 183 is mounted in the first mounting hole 117, and the outer wall of the first shock absorbing member 171 abuts against the inner wall of the first mounting hole 117. By extending the first shock absorbing member 171 all the way to the first mounting hole 117, direct contact between the first fixing member 151 and the second mounting portion 113 is reduced, thereby reducing vibration transmitted from the first fixing member 151 to the second fixing portion 113.

[0062] In this embodiment, a first limiting platform 179 is provided on the first shock absorbing member 171. The first limiting platform 179 abuts against the outer wall of the first mounting portion 111, and the first limiting portion 155 abuts against the first limiting platform 179. The abutment between the first limiting platform 179 and the first limiting portion 155 isolates the first fixing member 151 from direct contact with the first mounting portion 111, thereby reducing vibration.

[0063] In this embodiment, a first groove 127 is provided on the outer side wall of the first mounting portion 111 . The first limiting platform 179 is installed in the first groove 127 , and the first limiting platform 179 abuts against the bottom wall of the first groove 127 .

[0064] In this embodiment, the first shock absorbing member 171 is a rubber sleeve. Since the rubber sleeve has a certain bearing capacity and shock absorbing effect, the mounting base can be stably mounted on the arm base 110 while also providing better shock absorption.

[0065] In some other embodiments of the present application, the first shock-absorbing member 171 may also be made of other materials, such as soft plastic.

[0066] Please continue to refer to Figures 3 to 9 In this embodiment, the shock absorber 170 includes a second shock absorber 173. The second shock absorber 173 is provided with a second through-hole 177, and the second shock absorber 173 is mounted on the first fixing member 151 through the second through-hole 177. One end of the second shock absorber 173 abuts against the second side wall 133, and the other end is connected to the second mounting portion 113. By providing the second shock absorber 173 between the second mounting portion 113 and the motor base 130, direct contact between the motor base 130 and the second mounting portion 113 can be isolated, thereby reducing the transmission of vibration to the second mounting portion 113.

[0067] In this embodiment, the second shock absorber 173 partially extends into the fixing hole 135, and the outer wall of the second shock absorber 173 at least partially abuts against the inner wall of the fixing hole 135. By allowing the second shock absorber 173 to extend into the fixing hole 135 so that the outer wall of the second shock absorber 173 abuts against the inner wall of the fixing hole 135, the inner wall of the fixing hole 135 contacts the second shock absorber 173, thereby limiting the vertical vibration of the motor base 130.

[0068] In this embodiment, the aperture of the second portion 139 gradually increases in a direction away from the first portion 137. The second shock absorber 173 includes a third section 187 and a fourth section 189 connected in sequence, and the diameter of the third section 187 gradually decreases in a direction away from the fourth section 189. The third section 187 extends into the second portion 139, and the outer wall of the third section 187 abuts against the inner wall of the second portion 139, while the fourth section 189 abuts against the second mounting portion 113. By gradually decreasing the diameter of the third section 187 in a direction away from the fourth section 189 and gradually increasing the aperture of the second portion 139 in a direction away from the first portion 137, the contact area between the second shock absorber 173 and the inner wall of the fixing hole 135 can be increased, resulting in a better shock absorption effect.

[0069] Please continue to refer to Figures 3 to 9 In this embodiment, the fourth section 189 is mounted in the second mounting hole 121, and the outer wall of the fourth section 189 abuts against the inner wall of the second mounting hole 121. By extending the second shock absorbing member 173 all the way to the second mounting hole 121, direct contact between the first fixing member 151 and the second mounting portion 113 is reduced, thereby reducing the vibration transmitted from the first fixing member 151 to the first fixing member 151.

[0070] In this embodiment, a second limiting platform 181 is provided on the second shock absorbing member 173. The second limiting platform 181 abuts against the outer wall of the second mounting portion 113, and the second limiting portion 159 abuts against the second limiting platform 181. The abutment between the second limiting platform 181 and the second limiting portion 159 isolates the second fixing member 153 from direct contact with the second mounting portion 113, thereby reducing vibration.

[0071] In this embodiment, a second groove 129 is provided on the outer side wall of the second mounting portion 113 . The second limiting platform 181 is installed in the second groove 129 , and the second limiting platform 181 abuts against the bottom wall of the second groove 129 .

[0072] In summary, this embodiment reduces longitudinal vibration of the motor base 130 by providing first and second shock absorbers 171, 173 that clamp the motor base 130 from both sides. The first and second shock absorbers 171, 173 extend into the fixing hole 135 from either side, abutting against the inner wall of the fixing hole 135 to reduce longitudinal vibration of the motor base 130. The first and second shock absorbers 171, 173 completely isolate the motor base 130 from the first and second mounting portions 111, 113, preventing vibration from the motor base 130 from being directly transmitted to the arm base 110. The first shock-absorbing member 171 and the second shock-absorbing member 173 can also completely isolate the first fixing member 151 and the second fixing member 153 from direct contact with the first mounting portion 111 and the second mounting portion 113, so that the vibration of the first fixing member 151 and the second fixing member 153 cannot be directly transmitted to the arm base 110, thereby achieving better shock absorption and anti-vibration effects and preventing the fuselage 310 from being affected by the vibration.

[0073] Please continue reading Figure 2 In this embodiment, there are two first fixing members 151 and two second fixing members 153. The first mounting portion 111 defines two first mounting holes 117, the motor base 130 defines two fixing holes 135, the first shock absorbing members 171 define two, and the second shock absorbing members 173 define two. The first fixing members 151 are mounted in a one-to-one correspondence with the first mounting holes 117 and the fixing holes 135. The second fixing members 153 are mounted in a one-to-one correspondence with the first fixing members 151. The first shock absorbing members 171 are mounted in a one-to-one correspondence with the first fixing members 151, and the second shock absorbing members 173 are mounted in a one-to-one correspondence with the first fixing members 151 or the second fixing members 153.

[0074] In other embodiments of the present application, the number of first fixing members 151 and second fixing members 153 may be multiple or one, and the number of first mounting holes 117, fixing holes 135, second mounting holes 121, first shock absorbers 171, and second shock absorbers 173 may be the same as the number of first fixing members 151. When the number of first fixing members 151 and second fixing members 153 is one, it is sufficient to ensure that first fixing member 151 is not cylindrical and first mounting holes 117 and second mounting holes 121 are not cylindrical holes. The shape of first fixing member 151, fixing holes 135, and first mounting holes 117 cooperate to restrict the rotation of motor base 130 after the connection is loosened. It is understood that in this embodiment, the number of first fixing members 151, second fixing members 153, first mounting holes 117, fixing holes 135, second mounting holes 121, first shock absorbers 171, and second shock absorbers 173 is not limited.

[0075] See also Figure 3 、 Figure 4 、 Figure 6 and Figure 7 In this embodiment, the motor base 130 is a plastic part. In order to prevent the first fixing member 151 from causing wear on the fixing hole 135 formed on the motor base 130. The fixing hole 135 also includes a third part 147, and the third part 147 is located between the first part 137 and the second part 139. The matching part 132 is a metal sleeve 141, and the metal sleeve 141 is installed on the third part 147. One end of the metal sleeve 141 forms the first side wall 131, and the other end of the metal sleeve 141 forms the second side wall 133. Providing the metal sleeve 141 in the fixing hole 135 can reduce the wear of the motor base 130.

[0076] See also Figure 2 In this embodiment, the power device 200 includes a motor 210 and a propeller 230 . The motor 210 is mounted on the top of the support platform 143 . The propeller 230 is mounted on the rotor of the motor 210 .

[0077] In this embodiment, the arm assembly 100 further includes an electric adjuster 250 . A mounting platform is formed on the top of the second seat 125 , and the electric adjuster 250 is mounted on the mounting platform.

[0078] The working distance and beneficial effects of the rotorcraft 300 and the arm assembly 100 provided in this embodiment include:

[0079] In the present application, a first mounting portion 111 and a second mounting portion 113 are provided on the arm base 110, so that a gap 115 is formed between the first mounting portion 111 and the second mounting portion 113, and the motor base 130 is fixedly installed in the gap 115. The restriction of the gap 115 makes the fixation of the motor base 130 more stable. By providing a first mounting hole 117 on the first mounting portion 111, opening a fixing hole 135 on the motor base 130, using the first fixing member 151 to pass through the first mounting hole 117 and the fixing hole 135 in sequence, and allowing the first fixing member 151 to be connected to the second mounting portion 113, and then using the second fixing member 153 to cooperate with the first fixing member 151 to fix the motor base 130 in the gap 115 between the first mounting portion 111 and the second mounting portion 113, since the first fixing member 151 is passed through the first mounting hole 117 and the fixing hole 135 and is connected to the second mounting portion 113, the connection between the motor base 130 and the arm base 110 is simpler and more stable, thereby avoiding crashes and explosions caused by unreliable fixation of the motor base 130.

[0080] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A machine arm device, characterized in that: It includes an arm base, a motor base, a first fixing member and a second fixing member; The arm mount is used to connect to the fuselage of the rotorcraft, and the arm mount includes a first mounting portion and a second mounting portion arranged opposite to each other, the first mounting portion is provided with a first mounting hole, and a gap is provided between the first mounting portion and the second mounting portion; The motor seat is used to install the power device, and a fixing hole is provided on the motor seat; The first fixing member passes through the first mounting hole and the fixing hole in sequence, and the second fixing member cooperates with the first fixing member to fix the motor base in the gap; The second mounting portion is provided with a second mounting hole, and the first fixing member and / or the second fixing member is passed through the second mounting hole; The first fixing member includes a first limiting portion and a first connecting portion connected to each other, and the second fixing member includes a second limiting portion and a second connecting portion connected to each other, the first connecting portion sequentially passes through the first mounting hole, the fixing hole, and the second mounting hole, the first limiting portion abuts against an outer side wall of the first mounting portion, the second connecting portion is detachably connected to the first connecting portion, and the second limiting portion abuts against an outer side wall of the second mounting portion; The first connecting portion is threadedly engaged with the second connecting portion; A threaded hole is provided at one end of the first connecting portion away from the first limiting portion, a thread matching the threaded hole is provided on the side wall of the second connecting portion, and the second connecting portion is installed in the threaded hole of the first connecting portion through thread matching.

2. The machine arm device according to claim 1, characterized in that: The arm device includes a shock absorbing component, which is sleeved on the first fixing component and / or the second fixing component. The shock absorbing component is in contact with the motor base to reduce vibration of the motor base.

3. The machine arm device according to claim 2, characterized in that: The motor base includes a matching portion, and the matching portion includes a first side wall and a second side wall arranged opposite to each other; the fixing hole passes through the first side wall and the second side wall; The shock absorbing member includes a first shock absorbing member and a second shock absorbing member; The first shock absorbing member is provided with a first through hole, and the first shock absorbing member is sleeved on the first fixing member through the first through hole; One end of the first shock-absorbing member abuts against the first side wall, and the other end abuts against the first mounting portion; The second shock absorbing member is provided with a second through hole, and the second shock absorbing member is sleeved on the first fixing member or the second fixing member through the second through hole; One end of the second shock-absorbing member abuts against the second side wall, and the other end abuts against the second mounting portion.

4. The machine arm device according to claim 3, characterized in that: The fixing hole includes a first portion and a second portion, wherein the first portion and the second portion are respectively located at two ends of the fixing hole; One end portion of the first shock absorbing member extends into the first portion so that the outer wall of the first shock absorbing member abuts against the inner wall of the fixing hole; The second shock absorbing member partially extends into the second portion so that the outer side wall of the second shock absorbing member abuts against the inner wall of the fixing hole.

5. The machine arm device according to claim 4, characterized in that: The aperture of the first portion gradually increases in a direction away from the second portion, the first shock absorber includes a first section and a second section connected in sequence, the diameter of the first section gradually decreases in a direction away from the second section, the first section at least partially extends into the first portion, and the outer wall of the first section abuts against the inner wall of the first portion, and the second section abuts against the first mounting portion; The aperture of the second part gradually increases in the direction away from the first part, and the second shock absorber includes a third section and a fourth section connected in sequence. The diameter of the third section gradually decreases in the direction away from the fourth section. The third section at least partially extends into the second part, and the outer wall of the third section abuts against the inner wall of the second part, and the fourth section abuts against the second mounting portion.

6. The machine arm device according to any one of claims 3 to 5, characterized in that: The first shock absorbing member is partially mounted in the first mounting hole, and an outer side wall of the first shock absorbing member abuts against an inner wall of the first mounting hole; The second shock absorbing member is partially installed in the second mounting hole, and the outer side wall of the second shock absorbing member abuts against the inner wall of the second mounting hole.

7. The machine arm device according to any one of claims 3 to 5, characterized in that: The first shock absorber is provided with a first limiting platform, the first fixing member includes a first limiting portion and a first connecting portion, the first connecting portion sequentially passes through the first mounting hole and the fixing hole and is connected to the second fixing member, the first limiting platform abuts against the outer side wall of the first mounting portion, and the first limiting portion abuts against the first limiting platform; A second limiting platform is provided on the second shock-absorbing member, the second fixing member includes a second limiting portion and a second connecting portion, the second connecting portion is connected to the first connecting portion, the second limiting platform abuts against the outer side wall of the second mounting portion, and the second limiting portion abuts against the second limiting platform.

8. The machine arm device according to claim 3, characterized in that: The matching portion is a metal sleeve, which is installed in the fixing hole. One end of the metal sleeve forms the first side wall, and the other end of the metal sleeve forms the second side wall.

9. The machine arm device according to claim 3, characterized in that: The number of the first fixing members includes at least two, the number of the second fixing members includes at least two, the first mounting portion is provided with at least two first mounting holes, the motor base is provided with at least two fixing holes, the number of the first shock absorbing members includes at least two, and the number of the second shock absorbing members includes at least two; The first fixing members are installed in a one-to-one correspondence with the first fixing holes and the fixing holes, and the second fixing members are installed in a one-to-one correspondence with the first fixing members; The first shock absorbing members are mounted on the first fixing members in a one-to-one correspondence, and the second shock absorbing members are mounted on the first fixing member or the second fixing member in a one-to-one correspondence.

10. The machine arm device according to any one of claims 1 to 5, characterized in that: The arm device of the rotorcraft includes a connecting rod, a connecting hole is provided on the arm seat, one end of the connecting rod is installed in the connecting hole, and the other end is used to be connected to the fuselage.

11. A rotary-wing aircraft, characterized in that: Including the fuselage; And the arm device according to any one of claims 1 to 10, wherein the arm seat is installed on the fuselage.

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