Anti-collision unmanned aerial vehicle for power distribution network inspection
By designing a shock buffer structure with a combination of transparent protective sheath and elastic cushion on the drone, the problem of impact force transmission during collisions is solved, and the elastic deformation and rebound force buffering during impact is improved, thus reducing the non-resolution of the impact. The risk of human-machine out-of-control and improves the stability and efficiency of the drone by reducing screw usage and motor design.
Patent Information
- Application Number
- CN202411607477.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-01-10
AI Technical Summary
During the patrol, the impact force is directly transmitted to the surface of the drone during collision due to the propeller position and the design of the protective device during the inspection, resulting in problems of rollover and drop.
An anti-collision drone including a transparent protective sleeve and a disassembled support cantilever is designed. It uses a combination of elastic air cushion and fan grooves for impact buffering, and reduces the use of screws through structures such as elastic tension positioning units and clamping convex heads. Improved the impact buffering capability of the drone.
Effectively reduce the impact force transmission of drones during collision, improve elastic deformation and rebound force cushioning during impact, reduce the risk of drone loss of control and falling, and reduce the wear of screw removal and wear through the air conduit and Motor design improves the efficiency and driving force of the motor.
Smart Images
Figure CN119284233A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of unmanned aerial vehicle protection, and in particular to an anti-collision unmanned aerial vehicle for distribution network inspection. Background Art
[0002] Anti-collision protection equipment for security drones is used to protect drones performing security inspections. When conducting security inspections in the patrol area, in order to observe the dangerous area more clearly, the distance between the drone and the observed object is often very close. This causes the distance between the drone and complex obstacles to be too close, making it difficult for operators to effectively judge the nearby spatial form, greatly increasing the probability of the drone touching other objects. The protection equipment can protect the drone's blades from hitting the surface of the object and causing damage to the blades.
[0003] In the current existing technology, the propellers of the drone are located at the edges of both sides of the drone, and the existing protective devices on the propeller surface generally use a protective ring to wrap the propeller inside, so that there is a protective barrier between the drone propeller and the outside world, so that the propeller will not have too much contact with external objects. However, this existing device is in a whole with the drone, and it is relatively hard. When the drone collides with an external object, the instantaneous impact force generated by the drone during the collision will be directly transmitted to the surface of the drone, which will cause the drone to roll over after being hit, and even the drone will fall directly.
[0004] To this end, the present invention provides a collision-proof UAV for distribution network inspection. Summary of the invention
[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.
[0006] The technical solution adopted by the present invention to solve its technical problem is: the anti-collision distribution network inspection drone described in the present invention comprises a drone and a transparent protective shell fixedly installed on the surface of one side of the drone, a support cantilever frame detachably installed on the edge positions of both sides of the top of the drone, an anti-collision buffer unit detachably installed on the outer surface of one end of the support cantilever frame, the anti-collision buffer unit comprises a docking groove one provided on the outer surface of the coil protective shell, a motor is provided on the top surface of the coil protective shell, a hollow support ring is detachably sleeved on the outer surface of the coil protective shell, fan-shaped grooves are provided on the outer surface of the hollow support ring and at the four peripheral corners, and an elastic air cushion is fixedly connected to the outer surface of the hollow support ring; An elastic tension positioning unit is arranged on the outer surface of the hollow support ring, and the elastic tension positioning unit includes a clamping protrusion movably sleeved on the inner wall of a docking groove, and a hollow groove is opened on the inner wall of the clamping protrusion, and an elastic wire 2 is fixedly connected to the inner wall of the hollow groove, and a limiting soft strip is fixedly connected to the inner wall of the hollow groove and located at the upper and lower edge positions of the elastic wire 2, and a docking limiting plate movably sleeved on the inner wall of the hollow groove is fixedly connected to one end of the elastic wire 2.
[0007] Preferably, a butt joint strip is provided on the bottom edge of the transparent protective shell, a telescopic rod is symmetrically fixedly connected to the top inner wall of the transparent protective shell, and a closing cover is fixedly connected to one end of the telescopic rod.
[0008] Preferably, a second docking groove movably sleeved on the outer surface of the docking soft strip is provided on one side edge of the closing cover, and a rotating shaft is fixedly mounted on the outer surface of the telescopic rod.
[0009] Preferably, a camera is movably sleeved on one end of the rotating shaft, and an electric wire arranged on the inner wall surface of the drone is fixedly mounted on the back of the camera.
[0010] Preferably, a battery is provided on the outer surface of the drone, cantilever clamping grooves which are sleeved on the outer surface of the coil protective shell are opened on the edge positions of both sides of the top of the drone, support legs are fixedly connected to the two side surfaces of the drone, and an elastic wire is fixedly connected to the bottom surface of one end of the support leg.
[0011] Preferably, a fixing plate is fixedly connected to one end of the elastic wire, an anti-slip pad is fixedly connected to the bottom surface of the fixing plate, and an air duct fixedly connected to the outer surface of the top of the coil protective shell is arranged on the inner wall surface of the drone.
[0012] Preferably, a flash lamp is arranged on the outer surface of the hollow support ring, and a support arm is fixedly connected to the outer surface of the support cantilever frame.
[0013] Preferably, a conical support rod is fixedly mounted on the top surface of the coil protection shell, and the inner wall surface of the top end of the conical support rod is fixedly mounted on the outer surface of the motor.
[0014] The beneficial effects of the present invention are as follows: 1. The anti-collision distribution network inspection drone described in the present invention, when the drone contacts with external objects, the elastic air cushion on the outer surface of the hollow support ring contacts with the external object, and the elastic air cushion is compressed and deformed when it is hit, and then deformed under the extrusion of external force through the inclination angles of the upper and lower sides of the elastic air cushion, and the elastic air cushion and the fan-shaped groove cooperate with the deformation of the elastic air cushion and the fan-shaped groove when they are hit to buffer the impact of the drone, thereby reducing the excessive impact force of the elastic air cushion and the fan-shaped groove when they are hit, causing the drone to tilt and then cause the drone to lose control, so as to achieve the effect of using the elastic air cushion to elastically deform against the impact of the outside world when it is hit, and using the rebound force of the elastic air cushion during the elastic deformation to elastically buffer the swing of the drone, thereby reducing the impact force generated when the drone hits will be directly transmitted to the surface of the drone, thereby causing the drone to lose control; 2. The anti-collision distribution network inspection drone described in the present invention cooperates with the clamping protrusion on the inner wall of the hollow support ring to fit with the inner wall of the docking groove one, and at the same time cooperates with the elastic wire two on the inner wall of the hollow groove to elastically push the docking limit plate, so that the outer surface of the docking limit plate fits on the inner wall of the docking groove one. Whenever the drone is used for a period of time, it only needs to pull the hollow support ring vertically up and down to peel the hollow support ring off the surface of the coil protective shell. After replacing the new hollow support ring, the tension generated by the reverse thrust of the elastic wire two makes the hollow The support ring is positioned on the outer surface of the coil protection sleeve shell, and the clamping force between the clamping protrusion and the docking groove 1 is used to limit the position of the hollow support ring. At the same time, the friction force on the outer surface of the docking limit plate is used to make the hollow support ring effectively fit on the outer surface of the coil protection sleeve shell, and there is no need to use screws to fix the hollow support ring, thereby reducing the wear caused by multiple disassembly of the screws. In addition, the reverse tension of the elastic wire 2 and the friction force on the surface of the docking limit plate make the hollow support ring and the coil protection sleeve shell effectively limited together and not easy to fall off naturally. 3. The anti-collision distribution network inspection drone described in the present invention, when the motor is rotating, will guide and blow the airflow on the top of the motor downward, and absorb the airflow around the top of the motor, thereby causing pressure loss of the airflow around the top of the motor. The cavity under pressure loss will absorb the gas inside the air duct, and the other end of the air duct is connected to the inside of the drone, so that when the motor is rotating, it will absorb and discharge the excess hot air inside the drone, and then blow the airflow to the bottom of the motor, thereby increasing the reverse thrust of the motor, and using the thrust generated by the rotation of the propeller to discharge the heat source generated by the internal components of the drone. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1It is a perspective view of the present invention.
[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the drone of the present invention when viewed from the bottom.
[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the support leg of the present invention.
[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the transparent protective cover shell of the present invention in a sectional and unfolded manner.
[0019] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the coil protection shell of the present invention.
[0020] Figure 6 It is a schematic diagram of the unfolded three-dimensional structure of the coil protection shell of the present invention.
[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the hollow support ring of the present invention.
[0022] In the figure: 11, drone; 111, battery; 112, support leg; 113, elastic wire 1; 114, fixing plate; 115, anti-skid pad; 116, air duct; 117, cantilever clamping groove; 12, support cantilever frame; 121, coil protection shell; 122, conical support rod; 123, motor; 124, docking groove 1; 125, hollow support ring; 126, fan-shaped groove; 127, flash; 128, elastic air cushion; a1, clamping protrusion; a2, hollow groove; a3, limit soft strip; a4, elastic wire 2; a5, docking limit plate; 129, support arm; 13, transparent protective shell; 131, docking soft strip; 132, telescopic rod; 133, closing cover; 134, docking groove 2; 135, rotating shaft; 136, camera; 137, wire. DETAILED DESCRIPTION
[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0024] like Figures 1 to 7As shown, an anti-collision UAV for distribution network inspection according to an embodiment of the present invention comprises a UAV 11 and a transparent protective shell 13 fixedly mounted on a side surface of the UAV 11, a support cantilever frame 12 detachably mounted on the edge positions of both sides of the top of the UAV 11, an anti-collision buffer unit detachably mounted on the outer surface of one end of the support cantilever frame 12, the anti-collision buffer unit comprises a docking groove 124 provided on the outer surface of a coil protective shell 121, a motor 123 is provided on the top surface of the coil protective shell 121, a hollow support ring 125 is detachably sleeved on the outer surface of the coil protective shell 121, fan-shaped grooves 126 are provided on the outer surface of the hollow support ring 125 and at the four peripheral corners, and an elastic air cushion 128 is fixedly connected to the outer surface of the hollow support ring 125; An elastic tension positioning unit is provided on the outer surface of the hollow support ring 125, and the elastic tension positioning unit includes a clamping protrusion a1 movably sleeved on the inner wall of the docking groove 124, a hollow groove a2 is opened on the inner wall of the clamping protrusion a1, and an elastic wire a4 is fixedly connected to the inner wall of the hollow groove a2, and a limiting soft strip a3 is fixedly connected to the inner wall of the hollow groove a2 and located at the upper and lower edge positions of the elastic wire a4, and a docking limiting plate a5 movably sleeved on the inner wall of the hollow groove a2 is fixedly connected to one end of the elastic wire a4.
[0025] The anti-collision buffer unit and the elastic tension positioning unit provided by the present invention cooperate with the motor 123 to rotate and generate a downward airflow driving force, so that the UAV 11 can take off in the sky. When the UAV 11 contacts with external objects, the elastic air cushion 128 on the outer surface of the hollow support ring 125 contacts with external objects. The elastic air cushion 128 will be compressed and deformed when it is hit, and then the elastic air cushion 128 will be deformed under the pressure of external force through the upper and lower inclination angles of the elastic air cushion 128. When the elastic air cushion 128 and the fan-shaped groove 126 are hit, the deformation of the elastic air cushion 128 and the fan-shaped groove 126 will protect the UAV 11. The elastic cushion 128 and the fan-shaped groove 126 are deformed and buffered by the impact, so as to reduce the excessive impact force when the elastic air cushion 128 and the fan-shaped groove 126 are hit, which may cause the UAV 11 to tilt and then cause the UAV 11 to lose control. The elastic air cushion 128 is elastically deformed by the impact of the outside world when it is hit, and the rebound force of the elastic air cushion 128 during the elastic deformation is used to elastically buffer the swing of the UAV, so as to reduce the impact force generated when the UAV is hit. It will be directly transmitted to the surface of the UAV, thereby causing the UAV to lose control, and avoid the UAV being suddenly hit during the flight, and the UAV itself is not buffered, which will cause the UAV to swing and then cause the UAV to lose control; The engaging protrusion a1 on the inner wall of the hollow support ring 125 is fitted with the inner wall of the docking groove 124, and the elastic wire a4 on the inner wall of the hollow groove a2 is used to elastically push the docking limit plate a5, so that the outer surface of the docking limit plate a5 is fitted on the inner wall of the docking groove 124. Whenever the drone 11 is used for a period of time, it only needs to pull the hollow support ring 125 vertically up and down to peel the hollow support ring 125 off the surface of the coil protection shell 121. After replacing the new hollow support ring 125, the tension generated by the reverse thrust of the elastic wire a4 makes the hollow support ring 125 positioned on the coil. The outer surface of the protective sleeve 121, and the clamping force between the clamping protrusion a1 and the docking groove 124 are used to limit the position of the hollow support ring 125, and the friction force on the outer surface of the docking limit plate a5 is cooperated, so that the hollow support ring 125 can be effectively fitted on the outer surface of the coil protective sleeve 121, and there is no need to use screws to fix the hollow support ring 125, thereby reducing the wear caused by repeated disassembly of the screws. Moreover, the reverse tension of the elastic wire a4 and the friction force on the surface of the docking limit plate a5 make the hollow support ring 125 and the coil protective sleeve 121 effectively clamped together and not easy to fall off naturally.
[0026] Furthermore, if Figure 1 - Figure 2 and Figure 5 - Figure 7 As shown, a flash lamp 127 is provided on the outer surface of the hollow support ring 125, a support arm 129 is fixedly connected to the outer surface of the supporting cantilever frame 12, a conical support rod 122 is fixedly installed on the top surface of the coil protection shell 121, and the inner wall surface of the top end of the conical support rod 122 is fixedly installed on the outer surface of the motor 123.
[0027] When the motor 123 provided by the present invention is in use, when the motor 123 is rotating, the airflow at the top of the motor 123 will be guided and blown downward, and the airflow around the top of the motor 123 will be absorbed, thereby causing the airflow around the top of the motor 123 to lose pressure. The cavity under the loss of pressure will absorb the gas inside the air duct 116, and the other end of the air duct 116 is connected to the inside of the drone 11, so that when the motor 123 is rotating, the excess hot air inside the drone 11 will be absorbed and discharged, and the airflow will be blown to the bottom of the motor 123, thereby increasing the reverse thrust of the motor 123, and using the thrust generated by the rotation of the propeller to discharge the heat source generated by the internal components of the drone 11.
[0028] Furthermore, if Figure 1 - Figure 6As shown, a docking soft strip 131 is arranged at the bottom edge of the transparent protective shell 13, a telescopic rod 132 is symmetrically fixedly connected to the inner wall surface of the top of the transparent protective shell 13, a closing cover 133 is fixedly connected to one end of the telescopic rod 132, a docking groove 134 movably sleeved on the outer surface of the docking soft strip 131 is opened at the edge position of one side of the closing cover 133, a rotating shaft 135 is fixedly installed on the outer surface of the telescopic rod 132, a camera 136 is movably sleeved on one end of the rotating shaft 135, and a wire 136 arranged on the inner wall surface of the drone 11 is fixedly installed on the back of the camera 136. 7. A battery 111 is arranged on the outer surface of the drone 11, and cantilever clamping grooves 117 which are sleeved on the outer surface of the coil protective shell 121 are opened on the edge positions of the top of the drone 11. Support legs 112 are fixedly connected to the two side surfaces of the drone 11, and an elastic wire 113 is fixedly connected to the bottom surface of one end of the support leg 112, and a fixing plate 114 is fixedly connected to one end of the elastic wire 113, and an anti-slip pad 115 is fixedly connected to the bottom surface of the fixing plate 114. An air guide tube 116 which is fixedly connected to the outer surface of the top of the coil protective shell 121 is arranged on the inner wall surface of the drone 11.
[0029] When the docking soft strip 131, telescopic rod 132, closing cover 133, docking groove 2 134, rotating shaft 135, camera 136, supporting leg 112, elastic wire 1 13 and drone 11 provided by the present invention are in use, when the drone is inspecting the power distribution network at takeoff, if it encounters heavy fog, rainy season or windy sand environment, the telescopic rod 132 is used to pull the closing cover 133, so that one side surface of the closing cover 133 is attached to the outer surface of the docking soft strip 131, and at the same time, the docking soft strip 131 on the one side surface of the transparent protective shell 13 is squeezed onto the inner wall surface of the docking groove 2 134, so that the docking gap between the transparent protective shell 13 and the closing cover 133 is sealed, so as to isolate the rain or wind and sand from the outside, and prevent rain or gravel from directly entering the camera 136 or the drone. The interior of the human-machine 11, which in turn causes the components to be damaged due to the erosion of sand or water, and the internal instruments of the drone 11. When the drone 11 is flying, the rotating shaft 135 on the outer surface of the telescopic rod 132 is used to swing the camera 136, and the transparent material of the transparent protective shell 13 is used, so that the transparent protective shell 13 and the closing cover 133 are closed, and the internal camera 136 can still observe the outside world. When the drone 11 is flying, the flash 127 on the outer surface of the hollow support ring 125 flashes, so that employees can observe the height and position of the drone 11 on the ground. When the drone 11 falls, the elastic wire 113 on one end of the supporting leg 112 is used to elastically buffer the fall of the drone 11.
[0030] The working principle provided by the present invention is as follows: the motor 123 rotates to generate a downward airflow driving force, so that the drone 11 takes off in the sky. When the drone 11 contacts with external objects, the elastic air cushion 128 on the outer surface of the hollow support ring 125 contacts with the external object. The elastic air cushion 128 is compressed and deformed when it is hit, and then the elastic air cushion 128 is deformed under the pressure of external force through the upper and lower inclination angles of the elastic air cushion 128. When the elastic air cushion 128 and the fan-shaped groove 126 are hit, the elastic air cushion 128 and the fan-shaped groove 126 are pressed together. The deformation of the fan-shaped groove 126 and the fan-shaped groove 126 are used to deform and buffer the impact of the drone 11, reducing the excessive impact force when the elastic air cushion 128 and the fan-shaped groove 126 are hit, causing the drone 11 to tilt and then lose control. The elastic air cushion 128 is used to elastically deform in response to external impact when it is hit, and the rebound force of the elastic air cushion 128 during elastic deformation is used to elastically buffer the swing of the drone, thereby reducing the impact force generated when the drone hits the drone from being directly transmitted to the surface of the drone, thereby causing the drone to lose control. The engaging protrusion a1 on the inner wall of the hollow support ring 125 is fitted with the inner wall of the docking groove 124, and the elastic wire a4 on the inner wall of the hollow groove a2 is used to elastically push the docking limit plate a5, so that the outer surface of the docking limit plate a5 is fitted on the inner wall of the docking groove 124. Whenever the drone 11 is used for a period of time, it only needs to pull the hollow support ring 125 vertically up and down to peel the hollow support ring 125 off the surface of the coil protection shell 121. After replacing the new hollow support ring 125, the tension generated by the reverse thrust of the elastic wire a4 makes the hollow support ring 125 positioned on the coil. The outer surface of the protective sleeve 121 uses the clamping force between the clamping protrusion a1 and the docking groove 124 to limit the position of the hollow support ring 125, and cooperates with the friction force on the outer surface of the docking limit plate a5, so that the hollow support ring 125 can be effectively attached to the outer surface of the coil protective sleeve 121, and there is no need to use screws to fix the hollow support ring 125, thereby reducing the wear caused by multiple disassembly of the screws. In addition, the reverse tension of the elastic wire a4 and the friction force on the surface of the docking limit plate a5 make the hollow support ring 125 and the coil protective sleeve 121 effectively clamped together and not easy to fall off naturally. When the motor 123 is rotating, the airflow at the top of the motor 123 will be directed and blown downward, and the airflow around the top of the motor 123 will be absorbed, thereby causing the airflow around the top of the motor 123 to lose pressure. The cavity under pressure will absorb the gas inside the air duct 116, and the other end of the air duct 116 is connected to the inside of the drone 11, so that when the motor 123 is rotating, the excess hot air inside the drone 11 will be absorbed and discharged, and the airflow will be blown to the bottom of the motor 123, thereby increasing the reverse thrust of the motor 123, and using the thrust generated by the rotation of the propeller to discharge the heat source generated by the internal components of the drone 11.
[0031] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A collision-proof distribution network inspection drone, comprising a drone (11) and a transparent protective cover (13) fixedly mounted on a surface of one side of the drone (11), and a support cantilever frame (12) detachably mounted on both side edges of the top of the drone (11), characterized in that: An anti-collision buffer unit is detachably mounted on the outer surface of one end of the supporting cantilever frame (12), the anti-collision buffer unit comprising a docking groove (124) provided on the outer surface of the coil protection shell (121), a motor (123) is provided on the top surface of the coil protection shell (121), a hollow support ring (125) is detachably sleeved on the outer surface of the coil protection shell (121), fan-shaped grooves (126) are provided on the outer surface of the hollow support ring (125) and at the four peripheral corners, and an elastic air cushion (128) is fixedly connected to the outer surface of the hollow support ring (125); An elastic tension positioning unit is arranged on the outer surface of the hollow support ring (125), and the elastic tension positioning unit comprises a snap-fitting protrusion (a1) movably sleeved on the inner wall of the docking groove 1 (124), a hollow groove (a2) is provided on the inner wall of the snap-fitting protrusion (a1), an elastic wire 2 (a4) is fixedly connected to the inner wall of the hollow groove (a2), a limiting soft strip (a3) is fixedly connected to the inner wall of the hollow groove (a2) and located at the upper and lower edge positions of the elastic wire 2 (a4), and a docking limiting plate (a5) movably sleeved on the inner wall of the hollow groove (a2) is fixedly connected to one end of the elastic wire 2 (a4).
2. The anti-collision distribution network inspection drone according to claim 1, characterized in that: A butt joint soft strip (131) is provided at the bottom edge of the transparent protective shell (13), a telescopic rod (132) is symmetrically fixedly connected to the inner wall surface of the top of the transparent protective shell (13), and a closing cover (133) is fixedly connected to one end of the telescopic rod (132).
3. The anti-collision distribution network inspection drone according to claim 2, characterized in that: A second docking groove (134) movably sleeved on the outer surface of the docking soft strip (131) is provided on one side edge of the closing cover (133), and a rotating shaft (135) is fixedly mounted on the outer surface of the telescopic rod (132).
4. The anti-collision distribution network inspection drone according to claim 3, characterized in that: A camera (136) is movably sleeved on one end of the rotating shaft (135), and an electric wire (137) arranged on the inner wall surface of the drone (11) is fixedly mounted on the back of the camera (136).
5. The anti-collision distribution network inspection drone according to claim 4, characterized in that: A battery (111) is arranged on the outer surface of the drone (11); cantilever clamping grooves (117) sleeved on the outer surface of the coil protection casing (121) are provided on the edge positions of both sides of the top of the drone (11); support legs (112) are fixedly connected to the two side surfaces of the drone (11); and an elastic wire (113) is fixedly connected to the bottom surface of one end of the support leg (112).
6. The anti-collision distribution network inspection drone according to claim 5, characterized in that: A fixing plate (114) is fixedly connected to one end of the elastic wire (113), an anti-slip pad (115) is fixedly connected to the bottom surface of the fixing plate (114), and an air guide tube (116) is provided on the inner wall surface of the drone (11) and is fixedly connected to the outer surface of the top of the coil protection shell (121).
7. The anti-collision distribution network inspection drone according to claim 1, characterized in that: A flash lamp (127) is provided on the outer surface of the hollow support ring (125), and a support arm (129) is fixedly connected to the outer surface of the support cantilever frame (12).
8. The anti-collision distribution network inspection drone according to claim 7, characterized in that: A conical support rod (122) is fixedly mounted on the top surface of the coil protection shell (121), and the inner wall surface of the top end of the conical support rod (122) is fixedly mounted on the outer surface of the motor (123).