Abstract: A rotorcraft and a connecting structure for an arm and an airframe of a rotorcraft are provided. The connecting structure includes: a fixed sleeve pipe configured to extend out from a circumferential edge of the airframe; an insertion head configured to be disposed to the first end of the arm and configured to be inserted into the fixed sleeve pipe; a lock sleeve configured to be fitted over the arm and having an insertion portion configured to be embedded into the insertion groove; and a lock nut configured to be fitted over the arm and configured for being in threaded connection with the fixed sleeve pipe.

Abstract: An unmanned aerial vehicle (UAV) frame includes: a body bearing plate configured to mount a first element and a second element; a transfer chamber body mounted to the body bearing plate, defining a connection cavity with an open end, and provided with a through hole in communication with the connection cavity, in which the first element and the second element are located outside the transfer chamber body. The through hole is configured to pass through a connection line of the first element and a connection line of the second element. The connection cavity is configured to receive a connection interface of the connection line of the first element and a connection interface of the connection line of the second element. A transfer chamber cover sealedly covers the open end of the transfer chamber body.

Abstract: A driving device, a spraying device having the driving device, and an unmanned aerial vehicle having the spraying device are provided. The driving device includes a driving assembly and an abutting assembly. The driving assembly includes a driving motor (31). The driving motor (31) has a driving shaft (32). The abutting assembly is connected to the driving assembly and exerts an acting force on the driving shaft (32) to abut against the driving shaft (32).

Abstract: A pump body assembly, a pump, a sprinkler system, and an unmanned aerial vehicle are provided, the pump body assembly including a drainage outlet on a pump housing and a valve body portion of a valve core member, where the valve body portion is elastic, and the valve body portion changes from a natural state to an elastic deformation state under an action of liquid in the pump housing, such that when the valve body portion is in the natural state, the valve body portion seals the drainage outlet of the pump housing, and when the valve body portion is in the elastic deformation state, the valve body portion does not seal the drainage outlet of the pump housing.

Abstract: A battery module (100) and a method for controlling charge and discharge are provided. The battery module (100) includes a battery body disposed in an outer housing, a heat conduction assembly (4) connected between the outer housing and the battery body in a heat conduction manner, a first heating member (5) for heating the battery body, a second heating member (6) for heating the heat conduction assembly (4), a temperature sensor (8) for detecting a temperature of the battery body and generating a temperature signal according to the detected temperature of the battery body, and a control assembly (7) for receiving the temperature signal and controlling the first heating member (5) and the second heating member (6) according to the temperature signal.

Abstract: Some embodiments of the present disclosure provide an unmanned aerial vehicle, the unmanned aerial vehicle includes a fuselage, a shell assembly and a functional assembly. The fuselage includes a fuselage body. The shell assembly is connected to a front end of the fuselage body. The functional assembly is mounted at a rear end of the fuselage body. An upper end face of the functional assembly is a first circular arc face. An upper end face of the shell assembly is a second circular arc face. The first circular arc face is adjacent to the second circular arc face, and the first circular arc face and the second circular arc face constitute a streamlined curved face.

Abstract: A rotorcraft and an assembly and disassembly structure for a foot stand and an airframe of a rotorcraft are provided. The foot stand is disposed to a bottom of the airframe, the airframe has an accommodating groove, a top wall of the accommodating groove is provided with a hole, and a side wall of the accommodating groove is provided with a clamping slot, and the assembly and disassembly structure includes a fixing stand fixedly connected to the foot stand and accommodated in the accommodating groove; a plug pin movably mounted into the fixing stand, in which a portion of the plug pin passes through an upper surface of the fixing stand and forms an insertion end, and the insertion end matches the hole and is inserted into the hole; and an elastic component mounted in the fixing stand and connected to the plug pin.

Abstract: An unmanned aerial vehicle is provided and includes: an unmanned aerial vehicle body, including an airframe and an articles storing device; an arm, including at least two front arms symmetrically arranged with respect to a central axis of the airframe along a front-rear direction and at least two rear arms symmetrically arranged with respect to the central axis of the airframe; and a rotor-wing electric motor, including a front electric motor and a rear electric motor. A first end of the front arm is connected with a front end of the airframe, and a second end of the front arm is provided with the front electric motor to drive the unmanned aerial vehicle. A first end of the rear arm is connected with a rear end of the airframe, and a second end of the rear arm is provided with the rear electric motor to drive the unmanned aerial vehicle.

Abstract: A rotorcraft together with a heat dissipation structure for a motor are provided. The motor includes a body and a revolving shaft driven by the body, and the heat dissipation structure for the motor includes: a casing being a hollow structure having a top opening and an air inlet in a bottom portion, in which the body is disposed inside of the casing, and an air channel is formed between a circumferential edge of the body and an inner wall of the casing; a head cover connected to the revolving shaft of the motor synchronously and provided with a plurality of air flow picks on the lower surface thereof; and a mounting stand fixed to an upper surface of the head cover.

Abstract: A battery module (100) and a method for controlling charge and discharge are provided. The battery module (100) includes a battery body disposed in an outer housing, a heat conduction assembly (4) connected between the outer housing and the battery body in a heat conduction manner, a first heating member (5) for heating the battery body, a second heating member (6) for heating the heat conduction assembly (4), a temperature sensor (8) for detecting a temperature of the battery body and generating a temperature signal according to the detected temperature of the battery body, and a control assembly (7) for receiving the temperature signal and controlling the first heating member (5) and the second heating member (6) according to the temperature signal.

Abstract: An unmanned aerial vehicle is provided and includes: an unmanned aerial vehicle body, including an airframe and an articles storing device; an arm, including at least two front arms symmetrically arranged with respect to a central axis of the airframe along a front-rear direction and at least two rear arms symmetrically arranged with respect to the central axis of the airframe; and a rotor-wing electric motor, including a front electric motor and a rear electric motor. A first end of the front arm is connected with a front end of the airframe, and a second end of the front arm is provided with the front electric motor to drive the unmanned aerial vehicle. A first end of the rear arm is connected with a rear end of the airframe, and a second end of the rear arm is provided with the rear electric motor to drive the unmanned aerial vehicle.

Abstract: A rotorcraft and a connecting structure for an arm and an airframe of a rotorcraft are provided. The connecting structure includes: a fixed sleeve pipe configured to extend out from a circumferential edge of the airframe; an insertion head configured to be disposed to the first end of the arm and configured to be inserted into the fixed sleeve pipe; a lock sleeve configured to be fitted over the arm and having an insertion portion configured to be embedded into the insertion groove; and a lock nut configured to be fitted over the arm and configured for being in threaded connection with the fixed sleeve pipe.

Abstract: A rotorcraft and an assembly and disassembly structure for a foot stand and an airframe of a rotorcraft are provided. The foot stand is disposed to a bottom of the airframe, the airframe has an accommodating groove, a top wall of the accommodating groove is provided with a hole, and a side wall of the accommodating groove is provided with a clamping slot, and the assembly and disassembly structure includes a fixing stand fixedly connected to the foot stand and accommodated in the accommodating groove; a plug pin movably mounted into the fixing stand, in which a portion of the plug pin passes through an upper surface of the fixing stand and forms an insertion end, and the insertion end matches the hole and is inserted into the hole; and an elastic component mounted in the fixing stand and connected to the plug pin.

Abstract: A rotorcraft together with a heat dissipation structure for a motor are provided. The motor includes a body and a revolving shaft driven by the body, and the heat dissipation structure for the motor includes: a casing being a hollow structure having a top opening and an air inlet in a bottom portion, in which the body is disposed inside of the casing, and an air channel is formed between a circumferential edge of the body and an inner wall of the casing; a head cover connected to the revolving shaft of the motor synchronously and provided with a plurality of air flow picks on the lower surface thereof; and a mounting stand fixed to an upper surface of the head cover.