Dustproof net structure of logistics unmanned aerial vehicle brushless motor

Abstract

The application relates to the field of unmanned aerial vehicle brushless motors, and a dustproof net structure of a logistics unmanned aerial vehicle brushless motor, which comprises a shell, a rotor shaft, a stator assembly and a magnetic steel. The shell comprises a base, a front cover and a sleeve. The base is connected with a mounting seat, the mounting seat is provided with a rotating groove, the rotor shaft is rotatably embedded in the rotating groove, the front cover is connected with the rotor shaft, the sleeve is connected with the front cover, the base is provided with a lower communication cavity, the lower communication cavity is provided with a lower communication hole and a side communication hole, the stator assembly is connected with the outer periphery of the mounting seat, the front cover is provided with an upper communication cavity, the outer cavity wall of the upper communication cavity is provided with an upper communication hole, and the magnetic steel is connected with the front cover. The shell is composed of the front cover, the sleeve and the base. The front cover is provided with the upper communication cavity and the upper communication hole. The base is provided with the lower communication cavity, the lower communication hole and the side communication hole. The overall weight of the motor is reduced, the energy consumption of moving the unmanned aerial vehicle by itself is reduced, external gas is communicated with the lower communication cavity through the lower communication hole and the side communication hole or communicated with the upper communication cavity through the upper communication hole, and the heat dissipation efficiency of the brushless motor is improved.

Description

Technical Field

[0001] This application relates to the technical field of brushless motors for drones, and in particular to a dustproof mesh structure for a brushless motor of a logistics drone. Background Technology

[0002] Unmanned aerial vehicles (UAVs), also known as drones, are unmanned aircraft controlled by radio remote control equipment and their own program control devices. The term "UAV" is actually a general term for unmanned aerial vehicles, which can be technically categorized into several types: unmanned helicopters, unmanned fixed-wing aircraft, unmanned multi-rotor aircraft, unmanned airships, and unmanned paragliders. Compared to manned aircraft, they have advantages such as smaller size, lower cost, and ease of use.

[0003] To ensure heat dissipation efficiency, existing brushless motors for drones typically use perforated holes on the end face of the base to transfer heat. However, these perforated holes are relatively dense and have a small area, resulting in less than ideal heat dissipation for the motor. Furthermore, the overall weight of the casing is relatively heavy, leading to higher energy consumption for the drone and making it unsuitable for long-term continuous flight. Utility Model Content

[0004] To reduce the overall weight of the motor and improve its heat dissipation efficiency, this application provides a dustproof mesh structure for a brushless motor of a logistics drone.

[0005] The dustproof mesh structure for a brushless motor of a logistics drone provided in this application adopts the following technical solution:

[0006] A dustproof mesh structure for a brushless motor of a logistics drone includes a shell, a rotor shaft, a stator assembly, and a magnet. The shell includes a base, a front cover, and a sleeve. One end of the base is connected to a mounting seat, and the mounting seat has a rotating groove. The rotor shaft is rotatably embedded in the rotating groove. The front cover is connected to the end of the rotor shaft away from the base. One end of the sleeve is connected to the end of the front cover near the base. The end of the base near the mounting seat has a lower connecting cavity with several lower connecting holes at the bottom and several side connecting holes on the outer wall of the lower connecting cavity. The stator assembly is connected to the outer periphery of the mounting seat. The end of the front cover near the base has several upper connecting cavities with upper connecting holes on the outer wall of the upper connecting cavities. The magnet is connected to the front cover.

[0007] By adopting the above technical solution, the stator assembly generates a magnetic field when energized, driving the magnet to move and causing the rotor shaft, front cover, and sleeve to rotate. The outer shell consists of a front cover, sleeve, and base. The front cover has an upper connecting cavity and an upper connecting hole to reduce the mass of the front cover. The base has a lower connecting cavity, a lower connecting hole, and a side connecting hole to reduce the mass of the base, thereby reducing the overall weight of the motor and reducing the energy consumption of the UAV to move itself. When the brushless motor is working, the outside air is connected to the lower connecting cavity through the lower connecting hole and the side connecting hole or to the upper connecting cavity through the upper connecting hole, increasing the airflow and improving the heat dissipation effect of the air on the brushless motor, thus improving the heat dissipation efficiency of the brushless motor.

[0008] Preferably, it also includes a top dustproof net and a bottom dustproof net, the bottom dustproof net being embedded in the lower connecting cavity, the bottom dustproof net being in contact with the bottom and wall of the lower connecting cavity, and the front cover having an upper mounting groove at one end near the base, the top dustproof net being embedded in the upper mounting groove and covering the opening of the upper connecting cavity.

[0009] By adopting the above technical solution, the top dustproof net is embedded in the upper mounting groove and covers the upper connecting cavity opening, preventing large-diameter impurities in the outside air from directly entering the brushless motor through the upper connecting hole and the upper connecting cavity. The bottom dustproof net is embedded in the lower connecting cavity, preventing large-diameter impurities from directly entering the brushless motor through the lower connecting hole, side connecting hole and lower connecting cavity. The bottom dustproof net fits snugly against the wall of the lower connecting cavity, improving the dustproof effect of the bottom dustproof net, reducing the possibility of external impurities damaging the internal components of the brushless motor, and improving the service life and reliability of the brushless motor.

[0010] Preferably, the mounting base is provided with a plurality of heat dissipation grooves, which are distributed circumferentially around the axis of the mounting base.

[0011] By adopting the above technical solution, the contact area between the base and the outside air is increased, the heat exchange efficiency between the mounting base and the surrounding air is promoted, and the heat dissipation efficiency of the brushless motor is improved.

[0012] Preferably, a plurality of heat dissipation fins are connected to the wall of any of the heat dissipation slots.

[0013] By adopting the above technical solution, the contact area between the base and the outside air is increased, the heat exchange efficiency between the mounting base and the surrounding air is promoted, and the heat dissipation efficiency of the brushless motor is improved.

[0014] Preferably, the front cover is connected to a connecting ring at one end near the base. The outer wall of the connecting ring fits against the inner wall of the sleeve. The connecting ring is provided with a fourth fixing hole, and the sleeve is provided with a fourth connecting hole. The fourth connecting hole is used for a bolt to pass through and be threaded into the fourth fixing hole.

[0015] By adopting the above technical solution, the outer wall of the connecting ring fits into the inside of the sleeve, achieving initial fixation of the front cover and the sleeve along the axis of the front cover. This helps to rotate the front cover or the sleeve so that the fourth connecting hole corresponds to the fourth fixing hole, facilitating the subsequent provision of bolts to achieve a fixed connection between the front cover and the sleeve, and improving the ease of assembly of the brushless motor.

[0016] Preferably, a plurality of heat dissipation strips are connected to the outer wall of the sleeve, and the plurality of heat dissipation strips are distributed at intervals along the axis of the sleeve.

[0017] By adopting the above technical solution, several heat dissipation strips are connected to the outer wall of the sleeve, and these heat dissipation strips are distributed at intervals along the sleeve axis, which increases the heat dissipation area of ​​the outer surface of the sleeve and improves the heat dissipation efficiency of the brushless motor.

[0018] Preferably, a limiting strip is connected to one end of the connecting ring near the base. The limiting strip is located between two magnets, and one side surface of the limiting strip along the circumferential direction of the connecting ring axis is respectively in contact with one side surface of the magnet along the circumferential direction of the connecting ring axis.

[0019] By adopting the above technical solution, the connection between the magnet and the front cover is facilitated, the possibility of the magnet detaching from the front cover during the operation of the brushless motor is reduced, and the reliability of the brushless motor is improved.

[0020] Preferably, the outer wall of the mounting base is provided with a positioning groove, and a positioning strip is fixedly connected to the inner wall of the stator assembly, the positioning strip being embedded in the positioning groove.

[0021] By adopting the above technical solution, the cooperation between the positioning groove and the positioning bar improves the stability of the connection between the stator assembly and the mounting base, reduces the possibility of the stator assembly circumferentially deflecting relative to the mounting base during operation, and improves the reliability of the brushless motor.

[0022] Preferably, the outer wall of the mounting base is provided with a plurality of anti-slip grooves, and the plurality of anti-slip grooves are distributed at intervals along the axis of the mounting base.

[0023] By adopting the above technical solution, the anti-slip groove can increase the friction between the outer wall of the mounting base and the stator assembly, reduce the possibility of relative movement between the stator assembly and the mounting base along the axis of the mounting base, and improve the reliability of the brushless motor.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. When the stator assembly is energized, it generates a magnetic field, which drives the magnet to move and rotates the rotor shaft, front cover, and sleeve. The outer shell consists of a front cover, sleeve, and base. The front cover has an upper connecting cavity and an upper connecting hole to reduce the mass of the front cover. The base has a lower connecting cavity, a lower connecting hole, and a side connecting hole to reduce the mass of the base, thereby reducing the overall weight of the motor and reducing the energy consumption of the UAV to move itself. When the brushless motor is working, the outside air is connected to the lower connecting cavity through the lower connecting hole and the side connecting hole or to the upper connecting cavity through the upper connecting hole, which increases the airflow and improves the heat dissipation effect of the air on the brushless motor, thus improving the heat dissipation efficiency of the brushless motor.

[0026] 2. The top dustproof net is embedded in the upper mounting groove and covers the upper connecting cavity opening, preventing large-diameter impurities in the outside air from directly entering the brushless motor through the upper connecting hole and the upper connecting cavity. The bottom dustproof net is embedded in the lower connecting cavity, preventing large-diameter impurities from directly entering the brushless motor through the lower connecting hole, side connecting hole and lower connecting cavity. The bottom dustproof net fits snugly against the wall of the lower connecting cavity, improving the dustproof effect of the bottom dustproof net, reducing the possibility of external impurities damaging the internal components of the brushless motor, and improving the service life and reliability of the brushless motor.

[0027] 3. Increase the contact area between the base and the outside air to promote the heat exchange efficiency between the mounting base and the surrounding air, thereby improving the heat dissipation efficiency of the brushless motor. Attached Figure Description

[0028] Figure 1 This is a partial cross-sectional view of the dustproof mesh structure of the brushless motor of a logistics drone.

[0029] Figure 2 This is an exploded structural diagram of the dustproof net structure of the brushless motor of a logistics drone.

[0030] Figure 3 This is a structural diagram of the base.

[0031] Figure 4 This is an exploded structural diagram of the base and bottom dustproof net.

[0032] Figure 5 This is a partial cross-sectional view of the dustproof mesh structure of the brushless motor of a logistics drone, mainly showing the bearing cover.

[0033] Figure 6 This is a partial cross-sectional view of the dustproof mesh structure of the brushless motor of a logistics drone, mainly showing the waterproof cover.

[0034] Figure 7 This is an exploded structural diagram of the front cover and top dustproof net.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Outer shell; 11. Base; 111. Mounting base; 112. Lower connecting cavity; 113. Side connecting hole; 114. Connecting groove; 115. Lower connecting hole; 116. Lower fixing hole; 117. Insert groove; 118. Anti-slip groove; 119. Positioning groove; 1110. Removal groove; 1111. Annular groove; 1112. Heat dissipation groove; 1113. Heat dissipation fins; 1114. Rotation groove; 1115. First step groove; 1116. First fixing hole; 111 7. Groove; 1118. Second step groove; 1119. Second fixing hole; 1120. Wire passage hole; 12. Front cover; 121. Second connecting hole; 122. Limiting groove; 123. Third fixing hole; 124. Upper connecting cavity; 125. Upper connecting hole; 126. Upper mounting groove; 127. Upper fixing hole; 128. Connecting ring; 1281. Fourth fixing hole; 129. Limiting strip; 13. Sleeve; 131. Fourth connecting hole; 132. Heat dissipation strip;

[0037] 21. Bottom dustproof net; 211. Lower connecting hole; 212. Reserved hole; 22. Top dustproof net; 221. Upper connecting hole;

[0038] 3. Stator assembly; 31. Positioning bar;

[0039] 4. Rotor shaft; 41. Slot; 42. Limiting block; 421. Third connecting hole;

[0040] 51. Bearing; 52. Waterproof cover; 521. Second convex ring; 522. First convex ring; 523. Second connecting block; 5231. Second connecting hole; 53. Bearing cover; 531. First connecting hole; 532. First connecting block; 5321. First connecting hole; 54. Washer; 55. Snap ring; 56. Shaft end cover; 561. Third convex ring; 57. Abutment ring;

[0041] 6. Magnet. Detailed Implementation

[0042] The present application will be further described in detail below with reference to the accompanying drawings.

[0043] Reference Figure 1 This application discloses a dustproof mesh structure for a brushless motor of a logistics drone, including a shell 1 and a stator assembly 3. The shell 1 includes a base 11. One end of the base 11 along the axis of the base 11 is coaxially fixedly connected to a mounting seat 111. The outer periphery of the mounting seat 111 away from the base 11 is coaxially provided with a groove 117. The stator assembly 3 is embedded in the groove 117. One end of the stator assembly 3 abuts against the bottom of the groove 117. The inner wall of the stator assembly 3 is in contact with the wall of the groove 117. The end of the stator assembly 3 away from the bottom of the groove 117 is flush with the end of the mounting seat 111 away from the base 11.

[0044] Reference Figure 1 and Figure 2 The groove 117 has several anti-slip grooves 118 on its wall, which are spaced apart along the axis of the base 11. In this embodiment, there are nine anti-slip grooves 118, which are evenly distributed along the axis of the base 11. Positioning strips 31 are fixedly connected to the inner wall of the stator assembly 3. There are four positioning strips 31, which are evenly distributed circumferentially around the axis of the stator assembly 3. The groove 117 has positioning grooves 119 on its wall. The number of positioning grooves 119 is the same as the number of positioning strips 31 and they correspond one-to-one. The end of the positioning groove 119 away from the base 11 passes through the mounting base 111, and the positioning strips 31 are embedded in the positioning grooves 119. The mounting base 111 has removal grooves 1110 on its side wall. The number of removal grooves 1110 is the same as the number of positioning grooves 119 and they correspond one-to-one. The removal grooves 1110 are located on the side of the positioning grooves 119 closest to the base 11, and they are connected to the positioning grooves 119.

[0045] The base 11 has a lower connecting cavity 112 near the positioning component. The lower connecting cavity 112 surrounds the mounting base 111, and its inner wall is flush with the outer wall of the mounting base 111. The outer wall of the lower connecting cavity 112 has several side connecting holes 113, which are circumferentially spaced around the axis of the base 11. In this embodiment, there are sixteen side connecting holes 113, which are evenly distributed circumferentially around the axis of the base 11, and each side connecting hole 113 has a rectangular cross-section.

[0046] Reference Figure 1 and Figure 3 The base 11 has a connecting groove 114 at the end away from the lower connecting cavity 112. The number of connecting grooves 114 is the same as the number of side connecting holes 113 and they correspond one-to-one. In this embodiment, the connecting groove 114 has a fan-shaped cross-section. The bottom of the connecting groove 114 has a lower connecting hole 115, which is connected to the lower connecting cavity 112. In this embodiment, the lower connecting hole 115 has a fan-shaped cross-section, and there are fifteen lower connecting holes 115. The bottom of another connecting groove 114 has a wire through hole 1120, which is connected to the lower connecting cavity 112.

[0047] Reference Figure 1 and Figure 4A dustproof mesh structure for a brushless motor of a logistics drone also includes a bottom dustproof mesh 21. The bottom dustproof mesh 21 is embedded in the lower connecting cavity 112. The bottom dustproof mesh 21 has an L-shaped cross-section, and its inner wall is fitted against the inner wall of the lower connecting cavity 112. One surface of the bottom dustproof mesh 21 along its thickness direction is fitted against the bottom and wall of the lower connecting cavity 112. The bottom dustproof mesh 21 has a reserved hole 212, which corresponds to a wire-passing hole 1120. The reserved hole 212 and the wire-passing hole 1120 are used for the wires connected to the stator assembly 3 to pass through sequentially. The bottom of the lower connecting cavity 112 has a lower fixing hole 116, which penetrates the base 11 along its axial direction and is located between two connecting slots 114. In this embodiment, there are eight lower fixing holes 116, which are evenly distributed circumferentially around the axis of the base 11. The bottom dustproof mesh 21 is provided with a lower connecting hole 211. The number of lower connecting holes 211 is the same as the number of lower fixing holes 116 and they correspond one-to-one. The lower connecting holes 211 are used for bolts to pass through and be threaded into the lower fixing holes 116.

[0048] Reference Figure 1 and Figure 3 The mounting base 111 has a coaxial annular groove 1111 at one end away from the base 11. A heat dissipation groove 1112 is provided at the bottom of the connecting groove, and the heat dissipation groove 1112 is connected to the annular groove 1111. The number of heat dissipation grooves 1112 is the same as the number of connecting grooves 114 and corresponds one-to-one. The heat dissipation grooves 1112 are located inside the lower connecting cavity 112. In this embodiment, the heat dissipation groove 1112 has a fan-shaped cross-section. Several heat dissipation fins 1113 are fixedly connected to the outer wall of the heat dissipation groove 1112, and these fins are circumferentially spaced around the axis of the base 11. In this embodiment, three heat dissipation fins 1113 are provided in one heat dissipation groove 1112, and the three heat dissipation fins 1113 in the same heat dissipation groove 1112 are evenly distributed circumferentially around the axis of the base 11.

[0049] Reference Figure 1 and Figure 5A dustproof mesh structure for a brushless motor of a logistics drone also includes a rotor shaft 4, bearings 51, and bearing caps 53. A mounting base 111 is coaxially provided with a rotating groove 1114, which extends through the mounting base 111 along its axis. The rotor shaft 4 is coaxially rotatably embedded in the rotating groove 1114, with one end of the rotor shaft 4 extending out of the rotating groove 1114 away from the base 11. The rotating groove 1114 has first stepped grooves 1115 at both ends along the axis of the mounting base 111. Two bearings 51 are provided, each embedded in one of the two first stepped grooves 1115. The outer wall of the bearing 51 is in contact with the groove wall of the first stepped groove 1115, and the inner wall of the bearing 51 is in contact with the outer wall of the rotor shaft 4. The bearing cover 53 is fixedly connected to the end of the mounting base 111 away from the base 11. The bearing cover 53 has a first connecting hole 531 coaxially, which is used for the rotor shaft 4 to pass through. The inner wall of the bearing cover 53 fits against the inner wall of the annular groove 1111, and the bearing cover 53 abuts against the end of the bearing 51 cavity wall away from the bottom of the first stepped groove 1115. Four first connecting blocks 532 are fixedly connected to the outer wall of the bearing cover 53, and the four first connecting blocks 532 are evenly distributed around the axis of the bearing cover 53. The bottom of the annular groove 1111 has a first fixing hole 1116, the number of which is the same as the number of first connecting blocks 532 and corresponds one-to-one. The first fixing holes 1116 are located between the two heat dissipation grooves 1112. The first connecting block 532 has a first connecting hole 5321, which is used for bolts to pass through and be threaded into the first fixing hole 1116.

[0050] Reference Figure 3 and Figure 6A dustproof mesh structure for a brushless motor of a logistics drone also includes a waterproof cover 52. A groove 1117 is coaxially provided at the end of the base 11 away from the mounting base 111. The groove 1117 is connected to the connecting groove 114 and the rotating groove 1114. The waterproof cover 52 is embedded in the groove 1117, with one end abutting the bottom of the groove 1117 and the other end flush with the end of the base 11 away from the mounting base 111. A second protruding ring 521 is fixedly connected to the end of the waterproof cover 52 near the rotating groove 1114. A second stepped groove 1118 is coaxially provided at the groove wall of the first stepped groove 1115 away from the other first stepped groove 1115 on the side away from the bearing cover 53. The second protruding ring 521 is embedded in the second stepped groove 1118, with the outer wall of the second protruding ring 521 fitting against the groove wall of the second stepped groove 1118. The second convex ring 521, at its end furthest from the waterproof cover 52, is coaxially fixedly connected to the first convex ring 522. The first convex ring 522 is embedded in the first stepped groove 1115, with its outer wall fitting against the groove wall. The first convex ring 522 abuts against the end of the outer ring of the bearing 51 furthest from the bottom of the first stepped groove 1115. Four second connecting blocks 523 are fixedly connected to the side wall of the waterproof cover 52, evenly distributed around the axis of the waterproof cover 52. The second connecting blocks 523 are embedded in the connecting groove 114. The bottom of the connecting groove 114 has second fixing holes 1119, the number of which corresponds to the number of second connecting blocks 523. Each second connecting block 523 has a second connecting hole 5231 for a bolt to pass through and threadedly connect to the second fixing hole 1119.

[0051] Reference Figure 6 A dustproof mesh structure for a brushless motor of a logistics drone also includes a washer 54, a retaining ring 55, and a shaft end cap 56. The shaft end cap 56 is coaxially fixedly connected to one end of the rotor shaft 4 near the waterproof cover 52. A third convex ring 561 is coaxially fixedly connected to the end of the shaft end cap 56 near the rotor shaft 4, and the inner wall of the third convex ring 561 fits against the outer wall of the rotor shaft 4. The washer 54 is coaxially sleeved on the outer circumference of the rotor shaft 4. The end of the washer 54 away from the shaft end cap 56 abuts against the end of the inner ring of the bearing 51 near the waterproof cover 52 away from the other bearing 51. A retaining groove 41 is coaxially provided on the outer circumference of the rotor shaft 4, and the retaining ring 55 is embedded in the retaining groove 41. One end of the retaining ring 55 abuts against the end of the washer 54 away from the bearing 51, and the other end of the retaining ring 55 abuts against the end of the third convex ring 561 away from the waterproof cover 52.

[0052] Reference Figure 2 and Figure 5A dustproof mesh structure for a brushless motor of a logistics drone also includes an abutment ring 57, which is coaxially sleeved on the outer periphery of the rotor shaft 4. The inner wall of the abutment ring 57 is in contact with the outer wall of the rotor shaft 4, and one end of the abutment ring 57 abuts against the end of the inner ring of the bearing 51 away from the other bearing 51 on the side away from the waterproof cover 52. The outer shell 1 also includes a front cover 12, which is coaxially fixedly connected to the end of the rotor shaft 4 away from the waterproof cover 52. The end of the front cover 12 near the base 11 abuts against the end of the abutment ring 57 away from the bearing 51. The front cover 12 is coaxially provided with a second connecting hole 121, through which the rotor shaft 4 passes, and the outer wall of the rotor shaft 4 is in contact with the wall of the second connecting hole 121. A limiting block 42 is fixedly connected to the end of the rotor shaft 4 away from the waterproof cover 52, and a limiting groove 122 is provided at the end of the front cover 12 away from the base 11 for the limiting block 42 to be embedded. In this embodiment, the limiting block 42 is in the shape of a cross. One end of the limiting block 42 abuts against the bottom of the limiting groove 122, and the side wall of the limiting block 42 fits against the wall of the limiting groove 122. The bottom of the limiting groove 122 is provided with a third fixing hole 123, and there are four third fixing holes 123. The limiting block 42 is provided with a third connecting hole 421, and the number of third connecting holes 421 is the same as the number of third fixing holes 123 and they correspond one-to-one. The third connecting hole 421 is used for bolts to pass through and be threadedly connected to the third fixing hole 123.

[0053] Reference Figure 1 and Figure 7 A dustproof net structure for a brushless motor of a logistics drone also includes a top dustproof net 22. A plurality of upper connecting cavities 124 are provided at one end of the front cover 12 near the base 11, and these cavities are circumferentially spaced around the axis of the front cover 12. In this embodiment, there are eight upper connecting cavities 124, evenly distributed circumferentially around the axis of the front cover 12. An upper connecting hole 125 is provided on the outer wall of each upper connecting cavity 124, communicating with the outside. In this embodiment, the upper connecting cavity 124 has a fan-shaped cross-section, and the upper connecting hole 125 has a rectangular cross-section. An upper mounting groove 126 is provided at one end of the front cover 12 near the base 11. The top dustproof net 22 is embedded in the upper mounting groove 126 and covers the opening of the upper connecting cavity 124. One surface of the top dustproof net 22 along its thickness direction is in contact with the bottom of the upper mounting groove 126. An upper fixing hole 127 is provided at the bottom of the upper mounting groove 126. In this embodiment, twelve upper fixing holes 127 are provided. Eight upper fixing holes 127 are located on the outside of the upper connecting cavity 124 and are evenly distributed circumferentially around the axis of the front cover 12. The upper fixing holes 127 are located between the two upper connecting cavities. Four upper fixing holes 127 are located on the inside of the upper connecting cavity 124 and are evenly distributed circumferentially around the axis of the front cover 12. The top dustproof net 22 is provided with upper connecting holes 221. The number of upper connecting holes 221 is the same as the number of upper fixing holes 127 and they correspond one-to-one. The upper connecting holes 221 are used for bolts to pass through and be threaded into the upper fixing holes 127.

[0054] Reference Figure 1 and Figure 2 The outer casing 1 also includes a sleeve 13, which is coaxially fixedly connected to one end of the front cover 12 near the base 11. The outer wall of the sleeve 13 is flush with the outer wall of the front cover 12. A connecting ring 128 is coaxially fixedly connected to one end of the front cover 12 near the base 11. The outer wall of the connecting ring 128 fits against the inner wall of the sleeve 13. The connecting ring 128 has a fourth fixing hole 1281, the number of which is the same as the number of the upper fixing holes 127 and corresponds one-to-one. The axis of the fourth fixing hole 1281 is coplanar with the axis of the connecting ring 128. The sleeve 13 has a fourth connecting hole 131, the number of which is the same as the number of the fourth fixing holes 1281 and corresponds one-to-one. The fourth connecting hole 131 is used for bolts to pass through and be threaded into the fourth fixing hole 1281. Several heat dissipation strips 132 are fixedly connected to the outer wall of the sleeve 13, and the heat dissipation strips 132 are distributed at intervals along the axis of the sleeve 13. In this embodiment, there are six heat dissipation bars 132, which are evenly distributed along the axis of the sleeve 13.

[0055] A dustproof mesh structure for a brushless motor of a logistics drone also includes magnets 6. The magnets 6 are fixedly connected to one end of a connecting ring 128 near the base 11. Several magnets 6 are provided, and they are spaced apart circumferentially around the axis of the connecting ring 128. In this embodiment, forty-two magnets 6 are provided, and these forty-two magnets 6 are evenly distributed circumferentially around the axis of the connecting ring 128. A limiting strip 129 is fixedly connected to one end of the connecting ring 128 near the base 11. The limiting strip 129 is embedded between two magnets 6, and one side surface of the limiting strip 129 along the circumferential direction of the connecting ring 128 is respectively in contact with one side surface of the magnet 6 along the circumferential direction of the connecting ring 128.

[0056] The implementation principle of the dustproof net structure for a brushless motor of a logistics drone in this application embodiment is as follows: During assembly, the bottom dustproof net 21 is embedded in the lower connecting cavity, and the bolt passes through the lower connecting hole 211 and is threadedly connected to the lower fixing hole 116 to realize the fixed connection between the bottom dustproof net 21 and the base 11. The positioning component is sleeved on the outer periphery of the mounting base 111, and the positioning strip 31 is embedded in the positioning groove 119. One end of the positioning component abuts against the bottom of the groove 117.

[0057] The sleeve 13 is connected to the outer circumference of the connecting ring 128. The bolt passes through the fourth connecting hole 131 and is threaded into the fourth fixing hole 1281, thus fixing the sleeve 13 and the front cover 12. Several magnets 6 are sequentially embedded in two adjacent limiting strips 129. The rotor shaft 4 passes through the second connecting hole 121, the limiting block 42 is embedded in the limiting groove 122, and the bolt passes through the third connecting hole 421 and is threaded into the third fixing hole 123, thus fixing the rotor shaft 4 and the front cover 12. The abutment ring 57 is sleeved on the outer circumference of the rotor shaft 4. Two bearings 51 are respectively embedded in two first step grooves 1115. The bearing cover 53 abuts against the end of the outer ring of the bearing 51 closest to the front cover 12 that is away from the other bearing 51. The bolt passes through the first connecting hole 5321 and is threaded into the first fixing hole 1116, thus fixing the bearing 51 and the base 11 relative to each other along the axis of the base 11. The end of the rotor shaft 4 away from the front cover 12 passes through two bearings 51 in sequence. The abutment ring 57 abuts against the end of the inner ring of the bearing 51 closest to the front cover 12 away from the other bearing 51. The washer 54 is sleeved on the outer circumference of the rotor shaft 4. The retaining ring 55 is embedded in the retaining groove 41. The washer 54 abuts against the end of the inner ring of the bearing 51 away from the front cover 12 away from the other bearing 51. The shaft end cover 56 is connected to the end of the rotor shaft 4 away from the front cover 12. The third convex ring 561 abuts against the end of the retaining ring 55 away from the washer 54.

[0058] The waterproof cover 52 is embedded in the groove 1117, and the second protruding ring 521 is embedded in the second stepped groove 1118. The first protruding ring 522 is embedded in the first stepped groove 1115. The first protruding ring 522 abuts against the end of the outer ring of the bearing 51 away from the other bearing 51 on the side away from the front cover 12. The bolt passes through the second connecting hole 5231 and is threadedly connected to the second fixing hole 1119 to realize the fixed connection between the waterproof cover 52 and the base 11.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dustproof mesh structure for a brushless motor of a logistics drone, characterized in that: The system includes a housing (1), a rotor shaft (4), a stator assembly (3), and magnets (6); the housing (1) includes a base (11), a front cover (12), and a sleeve (13); one end of the base (11) is connected to a mounting seat (111); the mounting seat (111) is provided with a rotating groove (1114); the rotor shaft (4) is rotatably embedded in the rotating groove (1114); the front cover (12) is connected to the end of the rotor shaft (4) away from the base (11); one end of the sleeve (13) is connected to the end of the front cover (12) near the base (11); The base (11) has a lower connecting cavity (112) at one end near the mounting base (111); the bottom of the lower connecting cavity (112) has several lower connecting holes (115); the outer wall of the lower connecting cavity (112) has several side connecting holes (113); the stator assembly (3) is connected to the outer periphery of the mounting base (111); the front cover (12) has several upper connecting cavities (124) at one end near the base (11); the outer wall of the upper connecting cavity (124) has upper connecting holes (125); the magnet (6) is connected to the front cover (12).

2. The dustproof net structure for the brushless motor of a logistics drone according to claim 1, characterized in that: It also includes a top dustproof net (22) and a bottom dustproof net (21); the bottom dustproof net (21) is embedded in the lower connecting cavity (112); the bottom dustproof net (21) is in contact with the bottom and wall of the lower connecting cavity (112); the front cover (12) is provided with an upper mounting groove (126) at one end near the base (11); the top dustproof net (22) is embedded in the upper mounting groove (126) and covers the opening of the upper connecting cavity (124).

3. The dustproof net structure for the brushless motor of a logistics drone according to claim 1, characterized in that: The mounting base (111) is provided with a plurality of heat dissipation grooves (1112); the plurality of heat dissipation grooves (1112) are distributed circumferentially around the axis of the mounting base (111).

4. The dustproof net structure for the brushless motor of a logistics drone according to claim 3, characterized in that: A plurality of heat dissipation fins (1113) are connected to the wall of any of the heat dissipation slots (1112).

5. The dustproof net structure for the brushless motor of a logistics drone according to claim 1, characterized in that: The front cover (12) is connected to a connecting ring (128) at one end near the base (11); the outer wall of the connecting ring (128) fits against the inner wall of the sleeve (13); the connecting ring (128) is provided with a fourth fixing hole (1281); the sleeve (13) is provided with a fourth connecting hole (131); the fourth connecting hole (131) is used for the bolt to pass through and be threaded into the fourth fixing hole (1281).

6. The dustproof net structure for the brushless motor of a logistics drone according to claim 5, characterized in that: A plurality of heat dissipation strips (132) are connected to the outer wall of the sleeve (13); the plurality of heat dissipation strips (132) are distributed at intervals along the axis of the sleeve (13).

7. The dustproof net structure for the brushless motor of a logistics drone according to claim 5, characterized in that: The connecting ring (128) is connected to a limiting strip (129) at one end near the base (11); the limiting strip (129) is located between two magnets (6); one side surface of the limiting strip (129) along the axis of the connecting ring (128) is respectively attached to one side surface of the magnet (6) along the axis of the connecting ring (128).

8. The dustproof net structure for the brushless motor of a logistics drone according to claim 1, characterized in that: The mounting base (111) has a positioning groove (119) on its outer wall; a positioning strip (31) is fixedly connected to the inner wall of the stator assembly (3); the positioning strip (31) is embedded in the positioning groove (119).

9. The dustproof net structure for the brushless motor of a logistics drone according to claim 1, characterized in that: The mounting base (111) has a plurality of anti-slip grooves (118) on its outer wall; the plurality of anti-slip grooves (118) are distributed at intervals along the axis of the mounting base (111).

Images