JP2017017892A - Motor housing for multicopter and waterproof motor using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor housing for multicopter capable imparting waterproofness to a widely and generally circulating motor, and to provide a waterproof motor for multicopter in which waterproofness is enhanced thereby.SOLUTION: A motor housing 10 for multicopter capable of housing a motor 60 internally includes a lid 30 closing the opening of a body 20 having a bottomed cylindrical inner surface. At the junction of the body 20 and lid 30, an annular first seal member 41 consisting of an elastic body is placed, the lid 30 has a through hole 34 into which the rotating shaft 62 of a motor is inserted, and on the inner peripheral surface of the through hole 34, an annular second seal member 42 consisting of an elastic body is attached. In a waterproof motor 50 housing the motor 60 in the motor housing for multicopter, the inner peripheral surface of the body 20 and the lower surface of the lid 30 do not touch the motor case 61 of the motor 60.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a motor housing for a multicopter and a waterproof motor using the motor housing, and more particularly, to a motor housing for a multicopter capable of imparting water resistance to a motor that is widely distributed in general, and to a multicopter with improved water resistance. The present invention relates to a waterproof motor.

  Conventionally, a small unmanned aerial vehicle (UAV) typified by an industrial unmanned helicopter has been expensive and difficult to obtain, and requires skill to operate in order to fly stably. However, in recent years, high-performance and easy-to-handle acceleration sensors, angular velocity sensors, microcontrollers, etc. have become available at low prices, which has led to a drop in the price of the aircraft and the automation of many of the aircraft's control operations. The operability has improved dramatically. From such a background, the application of a small multi-copter to various missions in a wide range of fields is now being tried, not only for hobby purposes.

  A multicopter is a type of helicopter equipped with a plurality of rotors, and is a rotary wing aircraft that flies while balancing the fuselage by controlling the rotational speed of each rotor. Since a multi-copter can use a propeller having a simpler structure than that of a helicopter, the multi-copter is excellent in maintainability and can be configured at a relatively low cost.

  Further, an outer rotor type motor is generally used for each rotor of the multicopter. As a result, it is possible to rotate the propeller with a larger torque than in the case of using the inner rotor type motor.

  Patent Document 1 below discloses a waterproof motor that has improved waterproofness by applying a rubber seal member to an end surface of a motor housed in a container on the rotating shaft side and pressing the seal member against the motor side with a lid. Has been. In Patent Document 2 below, a motor having an output shaft having a substantially T-shaped cross section having a disk-shaped umbrella portion is accommodated in a waterproof cover, and the opening portion of the waterproof cover is covered with the umbrella portion. A waterproof motor is disclosed in which a waterproof property is improved by providing a dust seal and an oil seal between them.

JP 2001-157401 A JP 2011-250586 A

  As the role of the multicopter becomes more important, for example, it may be difficult to postpone the flight even in rainy weather. On the other hand, if raindrops enter the rotor of the multicopter, there is a risk of a motor short-circuit or a fault due to electric leakage, which in turn may cause the aircraft to crash.

  Assuming the above situation, even if the propeller motors are waterproofed against raindrops falling from above, the raindrops caught in the turbulence generated by the rotation of the propellers wrap around from below the motor. It is conceivable to enter inside. Further, when taking off and landing on the wet ground, or when flying on the surface of the water, it is conceivable that water splashed up by the ground effect or the water surface effect enters the motor. Furthermore, for example, when searching for a victim in a fire site, it is conceivable to receive high-pressure water discharge directly from the sprinkler or to receive the splashes of water droplets from four directions. Under such circumstances, it is desired that the motor of the multicopter has a high waterproof performance against water intrusion from all directions.

  In the case of adopting the configuration of Patent Document 1 in order to impart waterproofness to the motor of the multicopter, as described above, the waterproof motor of Patent Document 1 is made of rubber on the end surface on the rotating shaft side of the motor accommodated in the container. Since it is necessary to press the seal member, it cannot be applied to an outer rotor type motor in which the motor case itself rotates. Further, the waterproof case of Patent Document 2 can be used only for a dedicated motor having a specially shaped rotating shaft paired therewith, and cannot be applied to a motor that is widely distributed in general.

  SUMMARY OF THE INVENTION In view of the above problems, the problem to be solved by the present invention is to provide a motor housing for a multicopter capable of imparting water resistance to a motor that is widely distributed in general, and a water proof motor for multicopter that has been improved in water resistance. There is.

  In order to solve the above problems, a motor housing for a multicopter according to the present invention includes a main body having a bottomed cylindrical inner surface and a lid that closes an opening of the main body. A first seal member, which is an annular seal member made of an elastic body, is disposed at a joint portion between the main body portion and the lid portion, and the lid portion has a through hole through which the rotation shaft of the motor is inserted. And a second seal member, which is an annular seal member made of an elastic body, is attached to the inner peripheral surface of the through hole.

  By including a main body portion having a bottomed cylindrical inner surface and a lid portion that closes the opening of the main body portion, the motor housing of the present invention is an entire motor accommodated except for the rotating shaft of the motor exposed to the outside. Can be covered. A seal member made of an elastic body is provided between the main body portion and the lid portion, which are gaps through which water adhering to the motor housing enters, and between the through hole of the lid portion and the rotation shaft of the motor. Thus, it is possible to block water from entering from all directions. In addition, since the motor housing of the present invention has a bottomed cylindrical inner surface, the shape of the accommodation space is highly compatible with a generally circulating motor. Furthermore, since the waterproof mechanism for the through hole of the lid is only the second seal member provided between the motor and the rotation shaft, the second seal member may press the rotation shaft side end surface of the motor case. In addition, the second seal member does not hinder the rotation of the outer rotor type motor.

  Further, the main body portion has an outlet that pulls out the lead wire of the motor to the outside of the main body portion, and a third seal member that is a cap-shaped seal member made of an elastic body is fitted into the outlet, The third seal member may have a structure in which the lead wire is inserted and a holding hole for holding the lead wire by being tightened by an elastic force is formed.

  For example, the lead wire of the motor is not inserted into the motor mount or the frame that seals the lead-out port from the lead-out port provided on the bottom surface of the main body, for example. Even if it is the structure to expose, the penetration | invasion of the water from the lead-out port of a lead wire can be interrupted | blocked by providing the 3rd sealing member.

  In the present invention, it is preferable that the second seal member is a rubber O-ring, and a fluorine-based lubricant is applied to the surface of the second seal member.

  When the second seal member is a rubber O-ring, when a general mineral oil-based grease is used as a lubricant between the second seal member and the motor rotation shaft, the grease erodes the second seal member, Sealing performance may be reduced. On the other hand, when silicone grease is used to prevent erosion of the second seal member, the silicone grease has low pressure resistance, and the sealing performance cannot be maintained unless frequent maintenance is performed. According to this configuration, even when the second seal member is made of rubber, the second seal member is not eroded, and excellent durability can be maintained for a long time due to high durability.

  In the present invention, it is preferable that the fluorinated lubricant includes a base oil and a solid lubricant made of a fluorinated material.

  By using a high-purity fluorine-based lubricant in which the base oil and the solid lubricant are made of a fluorine-based material, the above-described effect of fluorine can be made more conspicuous.

  In the present invention, the bottom of the main body is provided with a screw hole for fixing the position of the motor in the main body and a screw hole for fixing the main body to the motor mount. It is preferable to have a configuration.

  With the above-described configuration, the rotation shaft of the motor can be inserted with high positional accuracy with respect to the through hole of the lid portion, the frictional resistance of the second seal member with respect to the rotation of the rotation shaft, and the wear of the second seal member Can be minimized.

  Moreover, in this invention, it is good also as a structure by which the rib part which is a protrusion extended in the circumferential direction of this main-body part is formed in the outer peripheral surface of the said main-body part.

  The rib part is expected to have an effect as a heat sink as well as an effect of improving the strength of the main body part. Since the motor housing according to the present invention is used for a propeller of a multicopter, at the time of use, the motor housing is always exposed to wind blowing above, wind pressure due to the flight of the multicopter, and turbulence caused by rotation of the propeller. Therefore, the effect as a heat sink becomes more conspicuous when a highly heat-conductive material such as a metal material is used for the motor housing.

  In order to solve the above problems, a waterproof motor of the present invention is a waterproof motor in which a motor is accommodated in a multicopter motor housing according to the present invention, and an inner peripheral surface of the main body and a lower surface of the lid are The motor case is not in contact with the housed motor.

  The only factors that affect the compatibility of the motor housing for multicopters of the present invention with the motor of a general configuration housed therein are their sizes. Specifically, the housing space of the motor housing for the multicopter may be larger than the motor case of the motor, and the shaft length of the rotating shaft of the motor may be long enough to be exposed to the outside through the through hole. By the said structure, the motor housing for multicopters of this invention can provide waterproof property to a wide variety of motors generally distributed.

  In the present invention, the motor accommodated in the multicopter motor housing is preferably an outer rotor type motor.

  The outer rotor type motor can output a larger torque than the inner rotor type motor. Since the housing space of the motor housing according to the present invention does not contact the outer peripheral surface of the motor case and the rotating shaft side end surface of the motor accommodated, the rotation is inhibited even when the outer rotor type motor is housed. There is no. Thereby, it is possible to easily obtain a larger output than the inner rotor type motor by using a generally distributed outer rotor type motor.

  In the present invention, it is preferable that a propeller of a multicopter is attached to the rotating shaft of the motor.

  By attaching a multicopter propeller to the waterproof motor of the present invention, the waterproofness of the rotor can be improved. Further, since the outer rotor type motor can be used for the waterproof motor of the present invention, the propeller of the multicopter can be rotated with a large torque. As a result, the propeller can be started smoothly and the rotation speed of the propeller can be maintained even when the rotation load of the propeller becomes high. Thereby, the stability of the aircraft during the flight of the multicopter can be enhanced.

  As described above, according to the motor housing for a multicopter and the waterproof motor using the same according to the present invention, it is possible to impart waterproofness to widely distributed motors, and thus the multicopter with improved waterproofness. A waterproof motor can be provided.

It is a disassembled perspective view which shows the external appearance of the motor housing for multicopters. It is sectional drawing which looked at the motor housing and the waterproof motor from the side. It is a bottom view of a motor housing. It is a perspective view which shows the external appearance of the waterproof motor with which the propeller was mounted | worn. It is a perspective view which shows the external appearance of the motor housing for multicopters concerning other embodiment.

  Embodiments of a motor housing for a multicopter (hereinafter also simply referred to as “housing”) and a waterproof motor using the same according to the present invention will be described below with reference to the drawings. The “multicopter” in the present invention means a multicopter as a small unmanned aerial vehicle (UAV). In the following description, “upper” and “lower” refer to the upper and lower sides shown in FIG.

(Housing outline)
The housing 10 according to this embodiment is a motor housing for a multicopter in which a motor that rotates a propeller of the multicopter is accommodated. FIG. 1 is an exploded perspective view showing the appearance of the housing 10. FIG. 2 is a cross-sectional view of the housing 10 and a waterproof motor 50 described later as viewed from the side. As shown in FIGS. 1 and 2, the housing 10 includes a main body 20 and a lid 30 that closes an opening of the main body 20.

  The main body 20 is a member that has a bottomed cylindrical outer shape and an inner surface 21 a and includes a cylindrical body 21 and a bottom 22 that seals the bottom of the body 21. A flange portion 23 in which the thickness of the body portion 21 is increased toward the outer side in the radial direction is formed at the end of the body portion 21 on the opening side. On the upper surface 23a of the flange portion 23 (joined portion with the lid portion 30), a single linear groove 24 is formed over the entire circumference in the circumferential direction. In addition, five screw holes 29 are provided at equal intervals in the circumferential direction at a portion radially outward from the groove 24 on the upper surface 23a of the flange portion 23.

  The lid portion 30 has a disk-like outer shape, and extends from the outer peripheral end of the top plate portion 31 in the radial direction toward the radially outer side. This is a member composed of a flange portion 32 which is a portion where the height of the upper surface is lowered stepwise. In the center of the top plate portion 31, a through hole 34 penetrating in the vertical direction is formed. The top surface of the top plate portion 31 is an inclined surface that gently slopes downward in the radial direction from the through hole 34, and the water droplets adhering to the top plate portion 31 flow down along the slope. However, it is difficult to approach the through hole 34. The flange portion 32 is provided with five screw holes 39 at positions corresponding to the circumferential positions of the screw holes 29 of the main body portion 20. A guide plate 33 extending in a curved shape is formed continuously from the outer peripheral end of the top plate portion 31 to the outer peripheral end of the flange portion 32 at a position sandwiching each screw hole 39 from both sides in the circumferential direction of the lid portion 30. Yes.

(Seal structure of housing 10)
The groove 24 formed in the flange portion 23 of the main body portion 20 is loaded with a large-diameter O-ring 41 that is a rubber O-ring (one form of a first seal member that is an annular seal member made of an elastic body). The The flange portion 32 of the lid portion 30 has the inner and outer diameters of the lower surface 32 a (joined portion with the main body portion 20) equal to the inner and outer diameters of the upper surface 23 a of the flange portion 23. When tightened, the large-diameter O-ring 41 is compressed in the vertical direction. This prevents water from entering between the lid portion 30 and the main body portion 20.

  As shown in FIG. 2A, the inner peripheral surface of the through-hole 34 provided in the lid portion 30 is composed of three portions whose diameters are reduced stepwise from the bottom to the top. An annular bearing 35 is attached to the lowermost portion of the through hole 34. A small-diameter O-ring 42 (one form of the second sealing member, which is an annular sealing member made of an elastic body) is attached to the second portion from the bottom (top) of the through hole 34. Yes. The uppermost portion of the through hole 34 is an opening having a diameter slightly larger than the inner diameter of the small diameter O-ring 42. As shown in FIG. 2B, the inner diameter of the small-diameter O-ring 42 is larger than the shaft diameter of the rotating shaft 62 of the outer rotor type brushless DC motor 60 (hereinafter simply referred to as “motor 60”) housed in the housing 10. It is adjusted to be slightly smaller, and this prevents water from entering from between the through hole 34 of the lid 30 and the rotating shaft 62 of the motor 60.

  Further, a fluorine-based lubricant is applied to the surface of the small-diameter O-ring 42 so that the frictional resistance with the rotating shaft 62 is reduced. Fluorine oil and PTFE (polytetrafluoroethylene), which are fluorine-based materials, are used for the base oil and fixed lubricant of the fluorine-based lubricant in this embodiment, respectively, and a quick-drying fluorine solvent is also used as the solvent. Yes. When a general mineral oil-based grease is used as a lubricant for the small-diameter O-ring 42 and the rotary shaft 62, the small-diameter O-ring 42 made of rubber may be eroded by the grease and the sealing performance of the small-diameter O-ring 42 may be reduced. is there. Since the small-diameter O-ring 42 in this embodiment is coated with a high-purity fluorine-based lubricant as a lubricant, the small-diameter O-ring 42 is not eroded and has excellent durability due to high durability. Can be maintained for a long time.

  As shown in FIG. 1, an outlet 25 is formed on the outer peripheral surface of the main body 20 to draw out the lead wire 63 (see FIG. 5) of the motor 60 to the outside of the main body 20. A rubber cap 43 (one form of a third seal member which is a cap-like seal member made of an elastic body) is fitted. The cap 43 is formed with a holding hole 431 through which the lead wire 63 is inserted and which holds the lead wire 63 by elastic force. The motor 60 is accommodated in the main body 20, and the lead wire 63 is inserted into the holding hole 431, thereby blocking water from entering from the outlet 25.

  From the elastic body to each of the joint portion between the main body portion 20 and the lid portion 30, the through-hole 34 of the lid portion 30, and the outlet 25 of the main body portion 20, which is a gap through which water adhering to the housing 10 can enter. Since the sealing member is provided, water can be prevented from entering the housing 10 from all directions. The “seal member made of an elastic body” as used in the present invention refers to a member that is in close contact with the gap between the members by being compressed and prevents entry of fluid such as water. Embodiments of the first seal member and the second seal member in the present invention are not limited to the large-diameter O-ring 41 and the small-diameter O-ring 42 used in the housing 10, but according to the shape of the housing and the required waterproof performance. Other packings and gaskets may be used.

  As shown in FIG. 2A, the housing 10 is configured by a bottomed cylindrical member in which the main body portion 20 includes a cylindrical trunk portion 21. Therefore, the shape of the housing space of the housing 10 (the space defined by the inner surface 21a of the main body portion 20 and the lower surface 30a of the lid portion 30) is substantially cylindrical. Further, a through hole 34 penetrating in the vertical direction is provided in the center of the lid portion 30 of the housing 10. Since most motors that circulate generally have a cylindrical motor case and a rotating shaft that extends from the center of one end of the motor case, the housing 10 has a wide variety of circulators that are generally circulated. It is possible to accommodate other motors.

  The only factors that determine the compatibility between the general motor and the housing 10 as described above are their sizes. Specifically, it is only necessary that the housing space of the housing 10 is larger than the motor case of the motor, and that the shaft length of the rotation shaft of the motor has a length that can be exposed to the outside from the through hole 34. The difference in the shaft diameter of the motor rotating shaft can be absorbed to some extent by changing the wire diameter of the small-diameter O-ring 42, and the shaft length of the rotating shaft can be extended to the rotating shaft extension adapter or the motor bottom raising adapter. It is also possible to widen the absorption range by preparing such as.

  In addition, the “bottomed cylindrical inner surface” which is a requirement of the main body in the present invention includes not only a cylindrical inner cylinder as in the case of the barrel 21 according to the present embodiment, but also a square cylindrical barrel. A configuration including a portion and a bottom portion is also included.

  Moreover, although the main-body part 20 and the cover part 30 in this embodiment both consist of aluminum alloys, the material used for these is not restricted to an aluminum alloy, Resin etc. are used according to a size and required waterproof performance. May be.

(Outline of waterproof motor)
A multicopter waterproof motor 50 according to the present embodiment (hereinafter simply referred to as “waterproof motor 50”) is a housing 10 in which a motor 60 is accommodated.

  As shown in FIG. 2B, the inner peripheral surface 21 b of the main body 20 of the waterproof motor 50 and the lower surface 30 a of the lid 30 are not in contact with the motor case 61 of the motor 60. Further, the waterproof mechanism of the through hole 34 of the lid 30 is only the small diameter O-ring 42 provided between the rotating shaft 62 of the motor 60, and the small diameter O-ring 42 (and the bearing 35) also rotates the motor case 61. It does not contact the shaft side end face 61b. That is, the waterproof motor 50 does not hinder the rotation of the motor even when the outer rotor type motor is accommodated in the housing 10. Thereby, the housing 10 can be applied to the outer rotor type motor, and it is possible to easily obtain a larger torque than the inner rotor type motor.

  In this embodiment, the outer rotor type motor 60 is used, but an inner rotor type motor may be used according to the required torque. Even in this case, the housing 10 of this embodiment can be applied to a wide variety of inner rotor type motors that are generally distributed.

  FIG. 3 is a bottom view of the housing 10 of the waterproof motor 50. The bottom portion 22 of the housing 10 has three motor fixing screw holes 26 that are screw holes for fixing the position of the motor 60 accommodated in the main body portion 20, and the motor mount 96 (see FIG. 4). Four housing fixing screw holes 27 which are screw holes for fixing the two are provided separately. These screw holes 26 and 27 are arranged at equal intervals along the circumferential direction of the bottom portion 22.

  As a procedure for fixing the waterproof motor 50 to the motor mount 96 of the multicopter, first, the motor 60 is accommodated in the main body 20 and a motor fixing screw (not shown) is temporarily tightened from the motor fixing screw hole 26. Next, the lid 30 is fixed to the main body 20 with a set screw 91, and the motor fixing screw is finally tightened. Then, the waterproof motor 50 is disposed on the motor mount 96 and a housing fixing screw (not shown) is tightened from the housing fixing screw hole 27.

  The housing 10 includes a motor fixing screw hole 26 and a housing fixing screw hole 27, and the waterproof motor 50 is fixed to the motor mount 96 of the multicopter by the procedure as described above, whereby the rotating shaft 62 of the motor 60 is attached to the lid portion. The thirty through holes 34 can be inserted with high positional accuracy. Thereby, it is possible to minimize the frictional resistance of the small-diameter O-ring 42 against the rotation of the rotary shaft 62 and the wear of the small-diameter O-ring 42.

  FIG. 4 is a view showing a state where a multi-copter propeller 95 is attached to the waterproof motor 50. Since the outer rotor type motor is used for the motor 60 of the present embodiment, the propeller 95 can be rotated with a large torque. As a result, the propeller 95 can be started smoothly, and the rotation speed of the propeller 95 can be maintained even when the rotation load of the propeller 95 becomes high, so that the stability of the aircraft during the flight of the multicopter is enhanced.

(Other embodiments)
Hereinafter, a multicopter motor housing 11 (hereinafter simply referred to as “housing 11”) according to another embodiment of the present invention, and a multicopter waterproof motor 51 (hereinafter simply referred to as “housing 11”) in which the motor 60 is accommodated in the housing 11 will be described. The waterproof motor 51 ") will be described with reference to the drawings. In the following description, components having the same or the same functions as those of the previous embodiment are denoted by the same reference numerals as those of the previous embodiment, and detailed description thereof is omitted.

  FIG. 5 is a perspective view showing a state where the motor 60 is accommodated in the housing 11. In the housing 11, a plurality of rib portions 78 that are protrusions extending in the circumferential direction are formed on the outer peripheral surface of the cylindrical body portion 71 of the main body portion 70. The rib portion 78 increases the strength of the housing 11 and also has a function as a heat sink. Since the housing 11 is used for a propeller of a multicopter, when used, the housing 11 is always exposed to wind blowing over the wind, wind pressure due to the flight of the multicopter, and turbulence caused by rotation of the propeller. Therefore, especially when a highly heat-conductive material such as a metal material is used for the housing 11, the effect as a heat sink becomes remarkable.

  In the present embodiment, the plurality of rib portions 78 are provided such that protrusions that are linearly continuous in the circumferential direction are provided apart from each other, and are arranged uniformly over the entire length of the body portion 71 in the vertical direction. The width and number of the ribs of the rib portion 78 are not limited to this, and various modes are conceivable as a requirement that the ribs extend in the circumferential direction. For example, the rib portion 78 may have a configuration in which a single linear protrusion is spirally wound around the outer peripheral surface of the body portion 71.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  The present invention is useful in a multicopter used for a mission where water wetting is predicted.

DESCRIPTION OF SYMBOLS 10 Multicopter motor housing 50 Multicopter waterproof motor 20 Main body 21 Body 21a Inner surface 21b Inner peripheral surface 22 Bottom 23 Flange 23a Upper surface 24 Groove 25 Outlet 26 Motor fixing screw hole 27 Housing fixing screw hole 30 Lid 30a Lower surface 32 Flange portion 32a Lower surface 34 Through hole 34a Inner peripheral surface 41 Large diameter O-ring 42 Small diameter O-ring 43 Cap 431 Holding hole 60 Motor 61 Motor case 62 Rotating shaft 63 Lead wire 11 Motor housing for multicopter (other embodiments)
51 Multicopter Waterproof Motor (Other Embodiments)
78 Rib part 95 Propeller 96 Motor mount

Claims (9)

A motor housing for a multicopter that can accommodate a motor therein,
A main body having a bottomed cylindrical inner surface;
A lid for closing the opening of the main body,
A first seal member, which is an annular seal member made of an elastic body, is disposed at a joint portion between the main body portion and the lid portion,
The lid portion has a through hole through which the rotation shaft of the motor is inserted, and a second seal member, which is an annular seal member made of an elastic body, is attached to the inner peripheral surface of the through hole. Motor housing for multicopters.   The main body portion has an outlet through which the lead wire of the motor is drawn out of the main body portion, and a third seal member, which is a cap-shaped seal member made of an elastic body, is fitted into the outlet, and the first 2. The motor housing for a multicopter according to claim 1, wherein the three seal member is formed with a holding hole through which the lead wire is inserted and clamped and held by an elastic force. The second seal member is a rubber O-ring;
The motor housing for a multicopter according to claim 1, wherein a fluorine-based lubricant is applied to a surface of the second seal member.   4. The motor housing for a multicopter according to claim 3, wherein the fluorine-based lubricant includes a base oil and a solid lubricant made of a fluorine-based material.   A screw hole for fixing the position of the motor in the main body part and a screw hole for fixing the main body part to the motor mount are separately provided in the bottom part of the main body part. The motor housing for a multicopter according to any one of claims 1 to 4.   The multicopter according to any one of claims 1 to 5, wherein a rib portion that is a protrusion extending in a circumferential direction of the main body portion is formed on an outer peripheral surface of the main body portion. Motor housing. A waterproof motor comprising a motor housed in the motor housing for a multicopter according to any one of claims 1 to 6,
The waterproof motor, wherein an inner peripheral surface of the main body portion and a lower surface of the lid portion do not contact a motor case of the accommodated motor.   The waterproof motor according to claim 7, wherein the motor accommodated in the motor housing for the multicopter is an outer rotor type motor.   The waterproof motor according to claim 7, wherein a propeller of a multicopter is attached to the rotating shaft of the motor.

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