CN220822765U - Motor and unmanned aerial vehicle - Google Patents

Abstract

The utility model provides a motor, which comprises a motor shaft, a rotor and a stator, wherein the motor shaft comprises a connecting end and an output end which are opposite, the connecting end of the motor shaft and the rotor are fixed and synchronously rotate relatively, the stator comprises a base and a coil module, the coil module array is fixedly arranged on the base, the connecting end of the motor shaft and the base are in sliding connection through a bearing assembly, the base comprises a limiting step, and the bearing assembly is abutted against the limiting step. The motor has the advantages of simple structure, convenient assembly and low processing cost. Meanwhile, the utility model further provides an unmanned aerial vehicle adopting the motor.

Description

Motor and unmanned aerial vehicle

[ Field of technology ]

The utility model relates to a motor and an unmanned aerial vehicle adopting the motor.

[ Background Art ]

As shown in fig. 1 and 2, the motor 30 includes a rotor cover 31, a plurality of magnets 33, a winding coil 35, a stator base 37, and a motor shaft 39.

The rotor cover 31 and the electronic base 37 are assembled to form an accommodating space for accommodating the plurality of magnets 33 and the winding assembly 35. The motor shaft 39 sequentially penetrates through the rotor cover 31 and the stator base 37, and the motor shaft 39 and the rotor cover 31 are mutually fixed in a screw hole matching manner, so that the relative synchronous rotation of the motor shaft 39 and the rotor cover 31 is realized. The motor shaft 39 and the stator base 37 are fixed by bearings, namely: when the motor shaft 39 rotates, the stator base 37 is relatively stationary, and the two do not rotate synchronously.

In order to further fix the relative positional relationship between the motor shaft 39 and the stator base 37, a limit spacer 371, a fixing screw 373, and a bolt 375 are additionally provided at an end portion of the motor shaft 39 adjacent to the stator base 37, as shown in fig. 3.

When assembling the motor 30, firstly, the motor shaft 39 and the stator base 37 are fixed together by the screw thread fit mode between the bolt 375 and the end part of the motor shaft 39, and the limit gasket 371 and the fixing screw 373 are clamped between the bolt 375 and the motor shaft 39; next, the rotor cover 31 and the motor shaft 39 are fixed together by means of screws penetrating the rotor cover 31.

When the motor 30 is operated, the motor shaft 39 rotates relative to the stator base 37, the rotor cover 31 rotates synchronously with the motor shaft 39, so that the rotor cover 31 rotates relative to the stator base 37, and the winding assembly 35 is fixed to the stator base 37 in view of the fact that the plurality of magnets 33 are fixed to the rotor cover 31, thereby realizing the rotation movement of the plurality of magnets 33 relative to the winding assembly 35.

However, in the above-described motor 30, the following drawbacks still exist:

First, since the end of the motor shaft 39 is required to be simultaneously engaged with the rotor cover 31, the stator base 37, and the bolts 375, the difficulty of processing the motor shaft 39 increases;

Secondly, the bolts 375 are matched with the limit gaskets 371 and the fixing screws 373 to fix the bearings, so that the stator base 37 cannot fix the bearings, and the bearings are easy to fall off;

Finally, when the motor shaft 39 is damaged and needs to be replaced, the bolts 375 need to be disassembled to be matched with the limit gaskets 371 and the fixing screws 373, and particularly after the unmanned aerial vehicle is integrally assembled, the difficulty of replacing the motor shaft 39 is high, and particularly when the motor shaft is replaced, the bearing is easier to fall off.

Aiming at the defects, a novel motor applied to the unmanned aerial vehicle field is necessary to be provided so as to effectively solve the technical problems.

[ utility model ]

Aiming at the technical problems that a motor shaft in the motor in the prior art is complex in processing, a bearing is easy to fall off and is inconvenient to replace and maintain, the utility model provides the motor which is simple in processing structure, is difficult to fall off, is convenient to replace and is convenient to maintain.

Meanwhile, the utility model further provides an unmanned aerial vehicle adopting the motor.

The motor comprises a motor shaft, a rotor and a stator, wherein the motor shaft comprises a relative connecting end and an output end, the connecting end of the motor shaft and the rotor are fixed and synchronously rotate relatively, the stator comprises a base and a coil module, a coil module array is fixedly arranged on the base, the connecting end of the motor shaft and the base are in sliding connection through a bearing assembly, the base comprises a limiting step, and the bearing assembly is abutted to the limiting step.

The utility model provides an unmanned aerial vehicle, includes frame, motor and screw, the frame supports and fixes the motor, motor drive the screw is rotatory, the motor includes motor shaft, rotor and stator, the stator includes base and coil module, coil module array set firmly in the base, the motor shaft includes relative link and output, the output with screw rigid coupling, the link of motor shaft with the rotor is fixed and relatively synchronous rotates, the link of motor shaft with the base passes through bearing assembly sliding connection, the base includes spacing step, bearing assembly butt spacing step sets up, the base is fixed to the frame.

Compared with the prior art, in the motor and the unmanned aerial vehicle adopting the motor, the limiting step is arranged in the base in the motor, so that the bearing assembly is effectively supported and fixed, the bearing assembly is prevented from sliding down in the vertical direction, the use of additional limiting gaskets, fixing screws, bolts and other elements is omitted, and the motor is simple in structure and convenient to assemble.

[ Description of the drawings ]

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a perspective assembly schematic of a machine disclosed in the prior art;

FIG. 2 is an exploded perspective view of the motor of FIG. 1;

FIG. 3 is a cross-sectional view of the motor shown in FIG. 1;

FIG. 4 is a schematic view of a three-dimensional assembly structure of a motor according to the present utility model;

FIG. 5 is an exploded perspective view of the motor of FIG. 4;

FIG. 6 is a cross-sectional view of the motor shown in FIG. 4;

FIG. 7 is another angular perspective view of the base of FIG. 5;

FIG. 8 is a partial cross-sectional view of the base of FIG. 7;

FIG. 9 is a perspective view of an unmanned assembly according to the present utility model;

FIG. 10 is an exploded perspective view of the drone of FIG. 9;

fig. 11 is an exploded view of a portion of the motor, propeller and frame shown in fig. 9.

[ Detailed description ] of the invention

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 4, 5 and 6 in combination, fig. 4 is a schematic perspective view of a motor according to the present utility model, fig. 5 is an exploded perspective view of the motor shown in fig. 1, and fig. 6 is a cross-sectional view of the motor shown in fig. 4. The motor 10 is a power module for driving the unmanned aerial vehicle propeller to work, receives the electrical control signal, and correspondingly outputs rotary power to drive the propeller to rotate at a set speed and a high speed. The motor 10 includes a rotor 11, a stator 13, and a motor shaft 15. The rotor 11 is fixed to the motor shaft 15 and both are stationary and rotate synchronously. The stator 13 and the motor shaft 15 are assembled together by relative rotation. The rotor 11 rotates relative to the stator 13, and synchronously drives the motor shaft 15 to rotate relative to the stator 13, so that the power output of the motor shaft 15 is realized.

The rotor 11 includes a cover 111, a through hole 112, a housing 113, a bolt 110, and a magnet module 115.

The cover 111 includes a support 1111 and an annular bracket 1113, where the support 1111 is sleeved in the annular bracket 1113, and supports the annular bracket 1113 to form a cover structure. The support body 1111 is provided with a through hole 112 at a central position thereof for penetrating the motor shaft 15. A plurality of hollow structures are uniformly arranged on the annular bracket 1113 in an array manner. Two fixing holes 1110 are symmetrically arranged at the end of the cover 111 along the direction perpendicular to the through hole 112, and the bolt 110 is in threaded engagement with the fixing holes 1110.

The casing 113 is an annular cylinder surrounded by an annular sidewall, an inner side surface of the casing 113 is disposed against an outer side surface of the annular bracket 1113, and the inner side surface of the casing 113 cooperates with a plurality of hollow structures of the annular bracket 1113 to form a plurality of accommodating spaces for accommodating the magnet modules 115 respectively.

The magnet module 115 includes a plurality of magnet units 1151, where the plurality of magnet units 1151 respectively correspond to a plurality of hollow structures uniformly arranged on the annular bracket 1113 in a one-to-one manner, and are respectively accommodated in a plurality of accommodating spaces formed by the inner side surface of the housing 113 and the plurality of hollow structures of the annular bracket 1113.

The stator 13 includes a coil module 131, a base 133, and a bearing assembly 135. The coil module 131, the base 133, and the bearing assembly 135 are correspondingly accommodated in an accommodating space defined by the cover 111 of the rotor 11 and the housing 113.

The coil module 131 includes a bracket 1311 and a coil 1313. The support 1311 is uniformly provided with a plurality of support arms 1312 around, the number of coils 1313 is plural, which corresponds to the support arms 1312 one by one, and the coils 1313 are wound around each support arm 1312. On the other hand, the coil 1313 corresponds to the magnet module 115 of the rotor 11, and when the motor is operated, the coil 1313 cuts and rotates in a magnetic field formed by the magnet module 115.

Referring to fig. 7 and 8 in combination, fig. 7 is another perspective view of the base shown in fig. 5, and fig. 8 is a perspective cross-sectional view of fig. 7. The base 133 includes a side wall 1331, a bottom wall 1333, a retaining step 1335, and a through hole 1337. The base 133 is nested and accommodated in the central position of the bracket 1311, and the base 133 and the bracket 1311 are fixed into an integral structure.

The side wall 1331 surrounds and encloses a hollow annular structure, and the bottom wall 1333 is connected with one end of the side wall 1331. The bottom wall 1333 is matched with the side wall 1331 to form a hollow columnar structure with a large opening diameter at one end and a small opening diameter at the other end. The limiting step 1335 is provided on an inner side surface of the junction between the side wall 1331 and the bottom wall 1333. The presence of the stopper step 1335 reduces the diameter of the through hole 1337 surrounded by the bottom wall 1333. The center of the through hole 1337 overlaps the center surrounded by the side wall 1331.

The bearing assembly 135 includes a first bearing 1351 and a second bearing 1353, the two bearings 1351 and 1353 are stacked along a vertical direction to form the bearing assembly 135, the bearing assembly 135 is accommodated in a hollow area surrounded by the side wall 1331, and meanwhile, an end portion of the bearing assembly 135 abuts against a surface of the limit step 1335 to limit the bearing assembly 135 from falling off from the stator 13 along the vertical direction.

The motor shaft 15 includes a shaft body 151 and a step groove 153, two ends of the motor shaft 15 are defined as a connection end 1513 and an output end 1511, and the connection end 1513 and the output end 1511 are respectively located at two opposite ends of the motor shaft 15. The connection end 1513 is fixed to the rotor 11 and the stator 13. Specifically, the connection end 1513 locks the cover 111 to the stepped groove 153 of the motor shaft 15 in place by the bolt 110; on the other hand, the connection end 1513 is rotationally fixed with the stator 13 by the bearing assembly 135, that is: the motor shaft 15 is free to rotate relative to the stator 13 via a bearing assembly 135.

When the motor 10 is assembled, the motor shaft 15 penetrates through the through hole 112 of the cover 111, the center of the magnet module 115, the center of the coil module 131, the center of the side wall 1331 of the base 133, and the center of the bearing assembly 135, and the stator 13 and the connection end 1513 of the motor shaft 15 are accommodated in the rotor 11; simultaneously, the motor shaft 15 and the stator 11 are fixed together through bolts 110 and rotate synchronously and still relatively, on the other hand, the stator 13 and the motor shaft 15 are assembled together through the bearing assembly 135, and the motor shaft 15 rotates relatively to the stator 13, so that the relative rotation between the stator 13 and the rotor 11 is realized.

Compared with the prior art, in the motor 10, the limiting step 1335 is disposed in the base 133, so that the bearing assembly 135 is effectively supported and fixed, the bearing assembly 135 is prevented from sliding down along the vertical direction, and additional elements such as limiting gaskets, fixing screws and bolts are omitted, so that the motor is simple in structure and convenient to assemble. When the motor shaft 15 needs to be replaced, only the bolt 110 for locking the cover 111 needs to be disassembled, and the disassembly from the stator 13 side is not needed, so that the replacement efficiency is improved. More importantly, the motor shaft 15 only needs to be provided with the step groove 153 on the side surface, other structures such as threads are not required to be machined, the machining requirement on the motor shaft 15 is reduced, and the cost is saved.

Referring to fig. 9, 10 and 11, fig. 9 is a perspective assembly schematic diagram of the unmanned aerial vehicle according to the present utility model, fig. 10 is a perspective exploded schematic diagram of the unmanned aerial vehicle shown in fig. 9, and fig. 11 is a schematic exploded view of a motor, a propeller and a part of a frame shown in fig. 9. The unmanned aerial vehicle 20 comprises a propeller 21, a motor 10, a motor bracket 23 and a grounding bracket 25.

The propeller 21 is fixed to one end of the motor 10, and receives the rotational force output from the motor 10 to drive the unmanned aerial vehicle 20 to take off or land.

The motor 10 is identical to the motor described above.

The motor bracket 23 is used for supporting the motor 10, and is fixedly connected to the base 133 of the motor 10.

The ground bracket 25 has one end fixed to the motor bracket 23, and supports the unmanned aerial vehicle 20.

In the above unmanned aerial vehicle 20, the connection end 1513 of the motor shaft 15 of the motor 10 and the stator 13 are assembled together only through the bearing assembly 135, and no additional bolt structure is needed, so that when the motor shaft 15 needs to be replaced, an operator only needs to disassemble the bolt 110 from the cover 111 side, which is convenient and efficient.

While the utility model has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the utility model.

Claims (10)

1. An electric machine, comprising:

The motor shaft comprises opposite connecting ends and output ends;

A rotor;

A stator, comprising:

a base; and

The coil module is fixedly arranged on the base, and is characterized in that the connecting end of the motor shaft is fixed with the rotor and synchronously rotates relative to the rotor, the connecting end of the motor shaft is slidably connected with the base through a bearing assembly, the base comprises a limiting step, and the bearing assembly is abutted to the limiting step.

2. The motor of claim 1, wherein the rotor comprises a cover and a magnet module, the motor shaft is fixed to the cover and rotates synchronously with respect to the cover, and the array of magnet modules is fixed around the cover.

3. The motor of claim 2, wherein the rotor further comprises a housing, wherein the housing is connected to the edge of the cover, and the magnet module is attached to the inner surface of the housing.

4. A motor as claimed in claim 3, wherein the housing is hollow and annular, the magnet module includes a plurality of magnet units, the magnet units are uniformly fixed on the inner surface of the housing, and the housing is integrally fixed with the cover.

5. The motor of claim 4, wherein the motor shaft includes a stepped slot, and the motor shaft is integrally fixed to the cover body by being inserted through the cover body by a bolt and engaged with the stepped slot.

6. The motor of claim 5, wherein the base comprises a hollow annular side wall and a bottom wall, the side wall and the bottom wall are connected to form a hollow annular structure, the bearing assembly is accommodated in the hollow annular structure, and the step groove is formed in the junction of the bottom wall and the side wall and supports the bearing assembly.

7. The motor of claim 3, wherein the cover includes a through hole, the housing is hollow ring-shaped, and a center of the through hole of the cover, a center of the housing, and a center of the motor shaft overlap.

8. The motor of claim 1, wherein the coil module comprises a bracket supporting the coil and a plurality of coils disposed opposite the magnet module of the rotor.

9. The motor of claim 1, wherein the bearing assembly comprises a first bearing and a second bearing stacked together, the connecting end of the motor shaft being slidably coupled to the first bearing and the second bearing.

10. A drone, comprising:

A frame;

A motor; and

The motor is supported and fixed by the frame, the motor is driven by the motor to rotate, the motor is characterized by comprising a motor shaft, a rotor and a stator, the stator comprises a base and a coil module, the coil module array is fixedly arranged on the base, the motor shaft comprises a relative connecting end and an output end, the output end is fixedly connected with the propeller, the connecting end of the motor shaft is fixedly connected with the rotor and synchronously rotates relatively, the connecting end of the motor shaft is in sliding connection with the base through a bearing assembly, the base comprises a limiting step, the bearing assembly is abutted against the limiting step, and the base is fixed on the frame.