TWI572124B - Unmanned aerial vehicle and its motor - Google Patents

Description

Unmanned aerial vehicle power mechanism and motor

The present invention relates to a power mechanism, and more particularly to a power mechanism for an unmanned aerial vehicle and a motor therefor.

The motor structure of the conventional unmanned aerial vehicle, after being connected to a propeller, can constitute a power mechanism of the unmanned aerial vehicle, and the power mechanism can provide the power required for the unmanned aerial vehicle to take off and land. However, as shown in the "structure of the aircraft" disclosed in the Chinese Patent Publication No. M499246, and the conventional motor structure 50, the rotor upper cover 52 is designed with a plurality of large-sized openings 52H, and the large-sized openings are provided. The 52H will greatly reveal the stator 54 inside the motor.

When the propeller 60 rotates, the airflow S generated by the propeller 60 usually entrains a lot of sand dust W. Therefore, when the airflow S enters the inside of the motor through the large-sized openings 52H, the sand dust W also easily enters the inside of the motor along with the airflow S. Further, the stator 54 is seriously contaminated. In addition to the large size opening 52H, the sand dust W can easily enter the inside of the motor, and the flow rate of the air flow S entering the motor can be reduced. (At a constant pressure, the larger the opening size, the smaller the resistance, the flow rate. The lower the flow rate S is, because the flow rate of the air flow S is a key factor affecting the internal heat dissipation of the motor. Once the flow rate of the air flow S is lowered, the heat dissipation rate inside the motor is also reduced, and the motor is prone to overheating.

Therefore, it is necessary to provide an innovative and progressive unmanned aerial vehicle power mechanism and its motor to solve the above problems.

The invention provides a power mechanism of an unmanned aerial vehicle, comprising a motor and a screw Rotary paddle. The motor includes a shaft seat, a stator, an outer rotor and a dust cover. The stator is sleeved on the shaft seat. The outer rotor includes a rotating shaft, a hollow body and a flow guiding cover. The rotating shaft is pivoted on the shaft seat. The hollow body is for accommodating the stator, and the hollow body is provided with a permanent magnet. The flow guiding cover is disposed at one end of the hollow body, and the flow guiding cover has a plurality of air flow passage openings. The dust cover is disposed above the air flow passage openings of the flow guiding cover. The propeller has a hub and a plurality of blades. The hub is disposed above the dust cover and connected to the outer rotor. The vanes connect the hub.

The invention further provides a motor comprising a shaft seat, a stator, an outer rotor and a dust cover. The stator is sleeved on the shaft seat. The outer rotor includes a rotating shaft, a hollow body and a flow guiding cover. The rotating shaft is pivoted on the shaft seat. The hollow body is for accommodating the stator, and the hollow body is provided with a permanent magnet. The flow guiding cover is disposed at one end of the hollow body, and the flow guiding cover has a plurality of air flow passage openings. The dust cover is disposed above the air flow passage openings of the flow guiding cover.

The dust cover is disposed above the air flow passage opening of the flow guiding cover to block sand dust entering the air flow passage opening, so that sand dust can be prevented from entering the hollow body and the stator is prevented from being Dust pollution.

The embodiments of the present invention can be more clearly understood, and the objects, features, and advantages of the present invention will become more apparent. The details are as follows.

1‧‧‧Power mechanism for unmanned aerial vehicles

10‧‧‧ motor

11‧‧‧ shaft seat

12‧‧‧ Stator

12S‧‧‧ wire trough

13‧‧‧Outer rotor

14‧‧‧Dust cover

14H‧‧‧bond hole

14S‧‧‧outer curved surface

20‧‧‧propeller

21‧‧·wheels

22‧‧‧ blades

50‧‧‧French motor structure

52‧‧‧Outer rotor cover

52H‧‧‧large size opening

54‧‧‧ Stator

60‧‧‧propeller

131‧‧‧ shaft

132‧‧‧ hollow body

132A‧‧‧One end of the hollow body

132M‧‧‧ permanent magnet

133‧‧ ‧ diversion cover

134‧‧‧ air passage

135‧‧‧Central Seat

135C‧‧ Center

136‧‧‧Support column

137‧‧‧Dust-proof paddles

137R‧‧‧ arc trajectory

A‧‧‧opening area of airflow passage opening

A1‧‧‧ total area of the outer periphery of the diversion cover

A2‧‧‧ Total area of the central seating

D‧‧‧The outer diameter of the dust cover

D1‧‧‧ outer diameter of the diversion cover

D2‧‧‧ inner diameter of the diversion cover

G‧‧‧Air gap

h‧‧‧The height of the dust cover

R‧‧‧Rotation direction

S‧‧‧ airflow

W‧‧‧ sand dust

1 is a perspective exploded view of a power mechanism of a conventional unmanned aerial vehicle; FIG. 2 is a perspective exploded view of the power mechanism of the unmanned aerial vehicle of the present invention; and FIG. 3 is a perspective assembled view of a power mechanism of the unmanned aerial vehicle of the present invention; Figure 4 is a perspective view of the motor of the present invention; Figure 5 is a perspective view of the outer rotor of the present invention; Figure 6 is a schematic view showing the total area of the outer periphery of the guide cover and the central socket of the present invention; Figure 7 is a plan view showing the motor of the present invention (removing the dust cover); Figure 8 is a plan view showing the motor of the other embodiment of the present invention (removing the dust cover); Figure 9 is a side view showing the power mechanism of the unmanned aerial vehicle of the present invention; 10 is a perspective exploded view of a power mechanism of an unmanned aerial vehicle according to another embodiment of the present invention; and FIG. 11 is a perspective assembled view of a power mechanism of an unmanned aerial vehicle according to another embodiment of the present invention.

2 is a perspective exploded view of the power mechanism of the unmanned aerial vehicle of the present invention. Figure 3 shows a perspective assembled view of the power mechanism of the unmanned aerial vehicle of the present invention. 2 and 3, the power mechanism 1 of the unmanned aerial vehicle of the present invention includes a motor 10 and a propeller 20. In this embodiment, the unmanned aerial vehicle can be an aerial camera (such as an aerial helicopter) or a drone.

Figure 4 shows a perspective assembled view of the motor of the present invention. Figure 5 shows a perspective view of the outer rotor of the present invention. Referring to FIG. 2, FIG. 4 and FIG. 5, the motor 10 includes a shaft seat 11, a stator 12, an outer rotor 13, and a dust cover 14.

The stator 12 is sleeved on the shaft seat 11, and the stator 12 has a plurality of wire slots 12S for winding coils (not shown).

The outer rotor 13 includes a rotating shaft 131, a hollow body 132 and a flow guiding cover 133. The rotating shaft 131 is pivotally mounted on the shaft seat 11 . The hollow body 132 is for receiving the stator 12, and the hollow body 132 is provided with a permanent magnet 132M.

The air guiding cover 133 is disposed at one end 132A of the hollow body 132, and the air guiding cover 133 has a plurality of air flow passage openings 134, a central bearing seat 135, a supporting column 136 and a plurality of dustproof tabs 137. The support post 136 is protruded from the central socket 135. The dust-proof paddles 137 are connected to the central socket 135, and each of the airflow passage openings 134 is located between the dust-proof tabs 137.

In this embodiment, the number of the dust-proof paddles 137 is equal to the number of the airflow channel ports 134, and preferably, the number of the dust-proof paddles 137 should be greater than or equal to the number of the wire slots 12S, that is, The number of the airflow passage openings 134 should be greater than or equal to the number of the equalization slots 12S, so that the size of the airflow passage openings 134 can be adjusted to better, thereby increasing the flow rate of the airflow entering the hollow body 132. Increase motor cooling rate.

Figure 6 is a schematic view showing the total area of the periphery of the guide cover and the center socket of the present invention. Figure 7 shows a top view of the motor of the present invention (with the dust cover removed). Referring to FIG. 2, FIG. 4, FIG. 6 and FIG. 7, in order to achieve the effect of increasing the flow rate of the airflow entering the hollow body 132 to increase the heat dissipation rate of the motor, the number of the dust-proof paddles 137 should be greater than or equal to 9 pieces. Preferably, the opening area A of each of the air flow passage openings 134 satisfies the following relationship: (A1 - A2) / 19 ≦ A ≦ (A1 - A2) / 9 where A1 is the flow guiding cover 133 The total area of the periphery, A2 is the total area of the periphery of the central seat 135.

In addition, in order to increase the heat dissipation rate of the motor, in the embodiment, the opening area of each of the airflow passage openings 134 may be larger than the slot area of each of the slots 12S, so that the airflow passages 134 have entered the airflow passages 134. After entering the respective slots 12S, the airflow in the hollow body 132 can be further increased (because the slot area is small, the resistance is large, and the flow rate is increased) to accelerate the heat dissipation of the stator 12.

Referring to FIG. 2 and FIG. 7 together, in order to rotate the dust-proof paddles 137, a swirling airflow and a centrifugal force can be generated to displace and pull out the sand dust that is to enter the airflow passage opening 134 with the airflow. In the embodiment, the dust-proof plucking pieces 137 are linear dust-proof plucking pieces, and the linear dust-proof plucking pieces are tangentially connected to the center socket 135. With the above design, sand dust can be effectively prevented from entering the hollow body 132 and the stator 12 can be prevented from being contaminated by sand dust.

Further, in order to maintain the stability of the outer rotor 13 when it is rotated, it is preferable that the thickness of each of the dustproof pieces 137 is equal in thickness in the longitudinal direction.

Referring to Figure 8, there is shown a motor (removing the dust cover) of another embodiment of the present invention. view. In another embodiment, the dust-proof plucking pieces 137 may also be arc-shaped dust-proof plucking pieces, and the arc-shaped dust-proof plucking pieces are bent against the rotation direction R of the outer rotor 13. Alternatively, in still another embodiment, the arcuate dustproof tabs are bendable along the direction of rotation R of the outer rotor 13.

In this embodiment, each of the arc-shaped dust-proof dials defines an arc track 137R, and each of the arc track 137R overlaps with each of the arc-shaped dust-proof tabs, and the arc track 137R intersects the center. One of the seats 135 is center 135C. Through the above design, the sand dust that is to enter the airflow passage opening 134 with the airflow can also be pulled out and pulled out. Alternatively, in another embodiment, the arc-shaped dust-proof plucking pieces may also be tangentially connected to the central socket 135, and may have the same dustproof effect.

Figure 9 shows a side view of the power mechanism of the unmanned aerial vehicle of the present invention. Referring to FIG. 2 , FIG. 3 , FIG. 4 , FIG. 7 and FIG. 9 , the dust cover 14 is disposed above the air flow passage openings 134 of the flow guiding cover 133 . In this embodiment, the dust cover 14 is concavely convex or convex. Alternatively, in another embodiment, the dust cover 14 may be flat and convex. In addition, in the embodiment, the dust cover 14 has a coupling hole 14H and an outer arc surface 14S. The dust cover 14 is sleeved on the support column 136 , and the support column 136 is disposed in the coupling hole 14H. The outer curved surface 14S faces the propeller 20 so that the sand dust falling along with the airflow can come into contact with the outer curved surface 14S to bounce outward.

In addition, in order to prevent the dust cover 14 from effectively blocking the sand dust entering the airflow passage opening 134, the outer diameter D of the dust cover 14 should satisfy the following relationship: (D1)/2 ≦D≦D1 where D1 is the outer diameter of the flow guiding cover 133.

Preferably, the outer diameter D of the dust cover 14 should be greater than or equal to the inner diameter D2 of the flow guiding cover 133.

In addition, in order to prevent the dust cover 14 from blocking the airflow from entering the hollow body 132, the influence is avoided. The heat dissipation rate, in this embodiment, has an airflow gap G between the dust cover 14 and the flow guiding cover 133, and the airflow can enter the hollow body 132 via the airflow gap G. In order to prevent the air gap G from being too large to cause the sand to easily enter, preferably, the air gap G should be smaller than the height h of the dust cover 14.

Referring again to FIGS. 2 and 3, the propeller 20 has a hub 21 and a plurality of blades 22. The hub 21 is disposed above the dust cover 14 and is connected to the outer rotor 13 . The vanes 22 are connected to the hub 21.

When the propeller 20 rotates, the sand dust entrained by the generated airflow is blocked by the dustproof cover 14 and cannot enter the airflow passage opening 134, thereby preventing sand dust from entering the hollow body 132 and preventing the stator 12 from being dusted. Pollution. In addition, by controlling the number and shape of the dust-proof tabs 137 and the opening area of each of the airflow passage openings 134, the flow rate of the airflow entering the hollow body 132 can be increased and the heat dissipation rate of the motor can be increased.

Figure 10 is a perspective exploded view of the power mechanism of the unmanned aerial vehicle of another embodiment of the present invention. 11 is a perspective assembled view of a power mechanism of an unmanned aerial vehicle according to another embodiment of the present invention. Referring to FIG. 10 and FIG. 11 , in order to simplify the assembly process of the present invention and reduce the manufacturing cost, in another embodiment, the dust cover 14 can be integrally formed with the hub 21 of the propeller 20 , and the blades 22 can also be It is integrally formed with the hub 21.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the scope of the present invention. The scope of the invention should be as set forth in the appended claims.

1‧‧‧Power mechanism for unmanned aerial vehicles

10‧‧‧ motor

11‧‧‧ shaft seat

12‧‧‧ Stator

12S‧‧‧ wire trough

13‧‧‧Outer rotor

14‧‧‧Dust cover

14H‧‧‧bond hole

14S‧‧‧outer curved surface

20‧‧‧propeller

21‧‧·wheels

22‧‧‧ blades

131‧‧‧ shaft

132‧‧‧ hollow body

132A‧‧‧One end of the hollow body

133‧‧ ‧ diversion cover

134‧‧‧ air passage

135‧‧‧Central Seat

136‧‧‧Support column

137‧‧‧Dust-proof paddles

Claims (34)

A power mechanism for an unmanned aerial vehicle includes: a motor comprising: a shaft seat; a stator, sleeved on the shaft seat; and an outer rotor including a shaft, a hollow body and a flow guide cover, the shaft pivoting The hollow body is configured to receive the stator, and the hollow body is provided with a permanent magnet, the flow guiding cover is disposed at one end of the hollow body, and the flow guiding cover has a plurality of airflow passage openings; A dust cover is disposed above the airflow passage opening of the flow guiding cover, and an outer diameter D of the dustproof cover satisfies the following relationship: (D1)/2≦D≦D1, and D1 is an outer diameter of the drainage cover And a propeller having a hub and a plurality of blades disposed above the dust cover and connected to the outer rotor, the blades connecting the hub. The power mechanism of the unmanned aerial vehicle of claim 1, wherein an air flow gap is formed between the dust cover and the flow guide cover. The power mechanism of the unmanned aerial vehicle of claim 1, wherein the outer diameter of the dust cover is greater than or equal to the inner diameter of the flow guide cover. The power mechanism of the unmanned aerial vehicle of claim 1, wherein the flow guiding cover further has a central bearing seat, a supporting column and a plurality of dustproof plucking pieces, wherein the supporting column protrudes from the central bearing seat, and the dustproof dialing The sheet is connected to the central socket, and each of the air flow passage openings is located between each of the dustproof tabs. The power mechanism of the unmanned aerial vehicle of claim 4, wherein the dust cover has a coupling hole, and the dust cover is sleeved on the support column, and The support column is disposed through the coupling hole. The power mechanism of the unmanned aerial vehicle of claim 4, wherein the stator has a plurality of trunkings, and the number of the dustproof dials is greater than or equal to the number of the trunking slots. The power mechanism of the unmanned aerial vehicle of claim 6, wherein the number of the dust-proof dials is greater than or equal to nine. The power mechanism of the unmanned aerial vehicle of claim 7, wherein the number of the dust plucking pieces is 11 to 19. The power mechanism of the unmanned aerial vehicle of claim 6, wherein an opening area of each of the air flow passage openings is larger than a notch area of each of the linear grooves. The power mechanism of the unmanned aerial vehicle of claim 6, wherein the number of the airflow passage openings is greater than or equal to the number of the same. The power mechanism of the unmanned aerial vehicle of claim 4, wherein the opening area A of each of the airflow passage openings satisfies the following relationship: (A1-A2) / 19 ≦ A ≦ (A1 - A2) / 9 A1 is the diversion The total area of the periphery of the cover, A2 is the total area of the periphery of the central seat. The power mechanism of the unmanned aerial vehicle of claim 4, wherein the dust-proof plucking pieces are linear dust-proof plucking pieces, and the linear dust-proof plucking pieces are tangentially connected to the central bearing. The power mechanism of the unmanned aerial vehicle of claim 4, wherein the dust-proof plucking pieces are arc-shaped dust-proof plucking pieces, and each of the arc-shaped dust-proof plucking pieces defines an arc trajectory, and each of the arc trajectories is The arc-shaped dust-proof tabs overlap. The power mechanism of the unmanned aerial vehicle of claim 13 Wherein the central socket has a center, and the arc segments of the arc-shaped dust-proof tabs intersect at the center. The power mechanism of the unmanned aerial vehicle of claim 4, wherein each of the dust-proof tabs has a thickness distribution that is equal in thickness along the length direction. A motor includes: a shaft seat; a stator is sleeved on the shaft seat; an outer rotor includes a rotating shaft, a hollow body and a flow guiding cover, the rotating shaft is pivoted on the shaft seat, and the hollow body is used for receiving The stator is disposed, and the hollow body is provided with a permanent magnet, the flow guiding cover is disposed at one end of the hollow body, and the flow guiding cover has a plurality of airflow passage openings; and a dust cover is disposed on the guiding cover Above the airflow passage openings, the outer diameter D of the dust cover satisfies the following relationship: (D1)/2≦D≦D1, and D1 is the outer diameter of the flow guide cover. The motor of claim 16, wherein the dust cover has an airflow gap with the flow guide cover. The motor of claim 16, wherein the outer diameter of the dust cover is greater than or equal to the inner diameter of the flow guide cover. The motor of claim 16, wherein the flow guiding cover further has a central bearing seat, a supporting column and a plurality of dustproof plucking pieces, wherein the supporting column protrudes from the central bearing seat, and the dustproof plucking piece connects the central bearing seat And each of the airflow passage openings is located between each of the dustproof tabs. The motor of claim 19, wherein the dust cover has a coupling hole, the dust cover is sleeved on the support column, and the support column is disposed through the coupling hole. The motor of claim 19, wherein the stator has a plurality of wire slots, and the number of the dust-proof tabs is greater than or equal to the number of the wire slots. The motor of claim 21, wherein the number of the dust plucks is greater than or equal to nine. The motor of claim 22, wherein the number of the dust plucks is from 11 to 19. The motor of claim 21, wherein an opening area of each of the air flow passage openings is larger than a notch area of each of the wire grooves. The motor of claim 21, wherein the number of the airflow passage openings is greater than or equal to the number of the conduit slots. The motor of claim 19, wherein the opening area A of each of the air flow passage openings satisfies the following relationship: (A1-A2) / 19 ≦ A ≦ (A1 - A2) / 9 A1 is the total peripheral area of the flow guiding cover, A2 is the total area of the periphery of the central seat. The motor of claim 19, wherein the dust-proof pluckles are linear dust plucking pieces, and the linear dust-proof plucking pieces are tangentially connected to the central socket. The motor of claim 19, wherein the dust-proof plucking pieces are arc-shaped dust-proof plucking pieces, each of the arc-shaped dust-proof plucking pieces defining an arc trajectory, each of the arc trajectories and each of the arc-shaped dust-proof dialing The slices overlap. The motor of claim 28, wherein the central socket has a center, the arcs of the arc-shaped dust-proof tabs The segment trajectories intersect at the center. The motor of claim 19, wherein each of the dust-proof tabs has a thickness distribution that is equal in thickness along the length direction. A power mechanism for an unmanned aerial vehicle includes: a motor comprising: a shaft seat; a stator, sleeved on the shaft seat; and an outer rotor including a shaft, a hollow body and a flow guide cover, the shaft pivoting The hollow body is configured to receive the stator, and the hollow body is provided with a permanent magnet, the flow guiding cover is disposed at one end of the hollow body, and the flow guiding cover has a plurality of airflow passage openings; a dust cover disposed above the air flow passage opening of the flow guide cover; and a propeller having a hub and a plurality of blades disposed above the dust cover and connecting the outer rotor, the blades The hub is connected, and the dust cover is integrally formed with the hub. The power mechanism of the unmanned aerial vehicle of claim 31, wherein the blade systems are integrally formed with the hub. A power mechanism for an unmanned aerial vehicle includes: a motor comprising: a shaft seat; a stator, sleeved on the shaft seat; and an outer rotor including a shaft, a hollow body and a flow guide cover, the shaft pivoting The hollow body is configured to receive the stator, and the hollow body is provided with a permanent magnet, the flow guiding cover is disposed at one end of the hollow body, and the flow guiding cover has a plurality of airflow passage openings; a dust cover disposed above the air flow passage opening of the flow guide cover, the dust cover is concavely convex; and a propeller having a hub and a plurality of blades, wherein the hub is disposed on the dust cover Upper and connected to the outer rotor, the blades are connected to the hub. A power mechanism for an unmanned aerial vehicle includes: a motor comprising: a shaft seat; a stator, sleeved on the shaft seat; and an outer rotor including a shaft, a hollow body and a flow guide cover, the shaft pivoting The hollow body is configured to receive the stator, and the hollow body is provided with a permanent magnet, the flow guiding cover is disposed at one end of the hollow body, and the flow guiding cover has a plurality of airflow passage openings; a dust cover disposed above the air flow passage opening of the flow guide cover; and a propeller having a hub and a plurality of blades disposed above the dust cover and connecting the outer rotor, the blades The hub is connected, and the dust cover has an outer curved surface facing the propeller.