CN112234726B - Motor for unmanned aerial vehicle and assembly method thereof - Google Patents

Abstract

The invention discloses a motor for an unmanned aerial vehicle and an assembly method thereof, and the motor comprises a stator, a rotor and a stator support, wherein the stator is arranged on the outer wall of the stator support in an interference fit manner, the rotor is positioned at the periphery of the stator, the stator comprises a first stator iron core, a winding insulation framework, a stator winding, a second stator iron core and a wedge key, the stator support comprises an integrally formed stator support inner ring part and a stator support outer ring part, the inner wall of an iron core ring body is in interference fit with the outer wall of the stator support inner ring part, an inner ring part groove is formed in the upper end of the stator support inner ring part, the rotor comprises a rotor support, magnetic steel, a spacing strip, a deformation reed, a rotor pressing plate and a rotating shaft, the rotor support comprises a rotor ring part and a support disk part, a magnetic steel groove is formed in the upper end of. The motor of the invention has simple and convenient assembly, good heat dissipation effect and good sealing effect.

Description

Motor for unmanned aerial vehicle and assembly method thereof

Technical Field

The invention relates to the technical field of motors, in particular to a motor for an unmanned aerial vehicle and an assembly method thereof.

Background

At present, unmanned aerial vehicles are widely used, and the motor demand of the unmanned aerial vehicles is sharply increased. The common characteristic of the motor of an unmanned aerial vehicle is that the stator is inside and the rotor is outside.

Among the prior art, the stator core of unmanned aerial vehicle motor is integrative, and stator winding fills in from the gap on every groove of stator core a bit, and it is very troublesome to roll off the production line, and the line is very loose, and the line will have the surplus, otherwise hardly puts into, and the protrusion of stator winding both ends is longer, and the stator winding loss is big, and power density is low.

Rotor magnet steel of unmanned aerial vehicle motor adopts the graduated disk to paste, needs accurate location operation, and the motor generates heat and can make the magnet steel of pasting insufficiently stable.

At present the unmanned aerial vehicle motor leans on the rotatory air current of paddle to carry out the forced air cooling, and the radiating effect is not good, can shorten bearing life, and calorific capacity increase also can make rotor magnet steel not stable enough simultaneously, remains to improve.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the motor for the unmanned aerial vehicle and the assembly method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a motor for unmanned aerial vehicle, includes stator, rotor and stator support, stator interference fit installs in the outer wall of stator support, the rotor is located the periphery of stator, the stator includes first stator core, winding insulation skeleton, stator winding, second stator core and wedge key, first stator core includes iron core ring body and the iron core branch of circumference equipartition at iron core ring body outer wall, stator winding twines in the periphery of winding insulation skeleton, the iron core branch passes winding insulation skeleton and the outer end of iron core branch is connected with second stator core, laminating between the inner wall of winding insulation skeleton and the outer wall of iron core branch is inserted and is established the wedge key, stator support includes integrated into one piece's stator support inner ring portion and stator support outer ring portion, the outer wall interference fit of the inner wall of iron core ring body and stator support inner ring portion, the upper end of the inner ring part of the stator support is provided with an inner ring part groove, the lower end of the inner ring part of the stator support is circumferentially and uniformly distributed with oil return holes, the oil return holes are communicated with the inner ring part groove, the rotor comprises a rotor support, magnetic steel, spacing strips, deformation reeds, a rotor pressing plate and a rotating shaft, the rotor support comprises a rotor ring part and a support disc part which are integrally formed, the upper end of the rotor ring part is provided with a magnetic steel groove, the magnetic steel is circumferentially and uniformly distributed in the magnetic steel groove, the spacing strips are laminated between two adjacent magnetic steel, the upper end faces of the magnetic steel are laminated with the deformation reeds and are arranged on the support disc part through the rotor pressing plate and tightly press the deformation reeds, the rotating shaft and the support disc part are in interference fit installation, the rotating shaft comprises a rotating shaft branch pipe, the upper end of the rotating shaft branch pipe is provided with a branch pipe groove, the upper end of the rotating, and the outer side of the outer ring part of the stator bracket is hermetically assembled with the rotor ring part.

The outer end of the iron core branch is provided with an iron core socket part protruding outwards, the inner end of the second stator iron core is provided with a notch groove matched with the shape of the iron core socket part, and the iron core socket part is inserted into the notch groove.

And the two end faces of the second stator core are both attached and abutted with wedge-shaped keys.

The lower part of pivot branch pipe inserts the center of stator support inner ring portion and the outer wall of pivot branch pipe is connected through interval distribution's second bearing and third bearing from top to bottom between the inner wall of stator support inner ring portion, the lower extreme of third bearing passes through the snap ring location, the shield is installed to the lower extreme inner wall interference fit of stator support inner ring portion.

The upper outer walls of the oil pipes are sleeved with the baffle plates, and the annular inner wall and the annular outer wall of each baffle plate are in clearance fit with the circumferential side wall of the inner annular groove, and an O-shaped ring is assembled between the annular inner wall and the annular outer wall of each baffle plate and the circumferential side wall of the inner annular groove.

The winding insulation framework comprises a surrounding edge portion, the stator winding is wound on the periphery of the surrounding edge portion, the surrounding edge portion is provided with a through framework through hole, the wedge-shaped key comprises a key insertion portion, an oblique edge portion is formed on one side of the key insertion portion, and an oblique surface portion attached to the oblique edge portion is formed on the side wall of the framework through hole.

A method for assembling a motor comprises the following steps of respectively assembling a stator, a rotor and a stator bracket, then assembling the stator into the outer wall of the stator bracket in an interference fit manner, and then assembling the rotor on the stator bracket;

the assembling steps of the stator are as follows: winding a stator winding outside each winding insulation framework, inserting each winding insulation framework into an iron core branch of a first stator iron core, inserting a wedge-shaped key between the inner wall of each winding insulation framework and the outer wall of each iron core branch, inserting the wedge-shaped key into one side of each winding insulation framework, loading a second stator iron core, enabling one end face of the second stator iron core to be attached to the wedge-shaped key on one side, and then inserting the wedge-shaped key on the other side;

the assembling steps of the rotor are as follows: put into magnet steel and space bar in proper order and guarantee that the upper end of magnet steel and space bar flushes in the magnet steel inslot circumference of rotor support, put into the deformation reed in the magnet steel inslot, the deformation reed supports the upper end of magnet steel and space bar, and installation rotor clamp plate makes rotor clamp plate's lower extreme butt deformation reed, and rotor support's upper end center is packed into in pivot interference fit.

The steps of mounting the rotor on the stator support are as follows: the second bearing and the third bearing are arranged on the inner wall of the stator support, the rotating shaft of the rotor penetrates through the second bearing and the third bearing from top to bottom in an interference fit mode, a plurality of oil pipes uniformly distributed in the circumferential direction of the rotor correspondingly extend into the inner annular groove of the stator support, and an O-shaped ring is arranged between the outer wall of the baffle plate sleeved outside the oil pipes and the circumferential side wall of the inner annular groove in a clearance fit mode.

The invention has the beneficial effects that:

1. each stator winding is directly inserted into the first stator core, the stator windings can be wound tightly without allowance, two ends of each stator winding do not need to protrude for a long time, loss is reduced, and power density of the motor is improved;

2. the stator is convenient to install and disassemble, and only the stator winding is wound outside each winding insulation framework, each winding insulation framework is inserted into the iron core branch of the first stator iron core until the arc-shaped part of the positioning bulge is attached to the arc-shaped groove, the second stator iron core is arranged, and a wedge-shaped key is inserted between the inner wall of the winding insulation framework and the outer wall of the iron core branch for tight support;

3. the labyrinth seal is formed by matching the support seal groove and the support seal groove, and a polytetrafluoroethylene sealing gasket is added, so that good seal can be kept between the rotor and the stator support;

4. the magnetic steel and the spacing bars can be directly inserted into the magnetic steel grooves, accurate positioning is not needed, the operation is convenient, the sticking process is omitted, and the performance of the subsequent magnetic steel is stable;

5. the deformed reed is matched with the rotor pressing plate to further position the magnetic steel, so that the magnetic steel is ensured to be reliably fixed and cannot be damaged;

6. the rotor is convenient to assemble, only the magnetic steel and the spacing strips are required to be sequentially placed in the circumferential direction in the magnetic steel groove of the rotor support, the deformation reed is placed in the magnetic steel groove, the rotor pressing plate is installed, so that the lower end of the rotor pressing plate is abutted to the deformation reed, and the rotating shaft is arranged in the center of the upper end of the rotor support in an interference fit manner;

7. when the motor works, cooling oil enters the oil pipe from the connecting pipe, the oil pipe is in a rotating state, the cooling oil is thrown out of the oil pipe hole onto the side wall of the inner ring groove, the heat dissipation area of the thrown oil is large, impact force is generated, the stator support, the stator, the second bearing, the third bearing and the like can be cooled, the cooling oil with the increased temperature returns to the cooling oil tank from the oil return pipe to be cooled and then is recycled, and the heat dissipation performance of the motor is greatly improved;

8. the oil pipe hole is positioned at the outermost edge of the oil pipe, and the oil pipe hole is over against the annular outer wall of the inner annular groove no matter where the oil pipe rotates, so that the optimal oil heat dissipation effect can be ensured;

9. a plurality of oil pipes are jointly sleeved with a baffle, and an O-shaped ring is arranged between the annular inner wall and the annular outer wall of the baffle and the circumferential side wall of the inner annular groove in a clearance fit mode, so that the sealing effect in the rotary working process of the oil pipes can be guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the stator of the present invention;

FIG. 3 is a front view of the stator of the present invention;

FIG. 4 is a first cross-sectional view of the stator of the present invention;

FIG. 5 is a second cross-sectional view of the stator of the present invention;

FIG. 6 is a partial exploded view of the stator of the present invention;

FIG. 7 is an enlarged view taken at A in FIG. 6;

FIG. 8 is a perspective view of a rotor of the present invention;

FIG. 9 is a first cross-sectional view of the rotor of the present invention;

FIG. 10 is a second cross-sectional view of the rotor of the present invention;

FIG. 11 is a partial exploded view of the rotor of the present invention;

fig. 12 is an enlarged view at B in fig. 1.

In the figure: the stator comprises a first stator iron core 1, an iron core ring body 11, an iron core branch 12, an iron core socket part 13, an arc-shaped groove 14, a winding insulation framework 2, a surrounding edge part 21, an outer supporting plate 22, an inner supporting plate 23, a positioning bulge 24, a framework through hole 25, a stator winding 3, a second stator iron core 4, a notch groove 41, a wedge-shaped key 5, a key insertion part 51, a key contact part 52, a bevel edge part 53, a rotor support 6, a magnetic steel groove 61, a support sealing groove 62, a rotor ring part 63, a support disk part 64, a disk part central hole 65, magnetic steel 7, a spacing bar 71, a deformation reed 72, a rotor pressing plate 73, a rotating shaft 8, a rotating shaft branch pipe 81, a branch pipe groove 82, an oil pipe 83, an oil pipe hole 84, a baffle plate 85, a first bearing 86, a connecting pipe 87, a second bearing 88, a third bearing 89, a clamping ring 810, a dust cover 811, a, Bracket fixing hole 94, inner ring groove 95, oil return hole 96, sealing gasket 97 and oil return pipe 98.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description below:

as shown in fig. 1-12, a motor for unmanned aerial vehicle, includes stator, rotor and stator support 9, the stator includes first stator core 1, winding insulation skeleton 2, stator winding 3, second stator core 4 and wedge key 5, and the stator core of this embodiment is split type, divide into first stator core 1 and second stator core 4 promptly, first stator core 1 includes iron core ring body 11 and the iron core branch 12 of circumference equipartition at iron core ring body 11 outer wall, and the inner of two adjacent iron core branches 12 forms arc wall 14 with the outer wall cooperation of iron core ring body 11.

The outer end of the iron core branch 12 is provided with an iron core socket part 13 protruding outwards, the inner end of the second stator iron core 4 is provided with a notch groove 41 matched with the shape of the iron core socket part 13, and the iron core socket part 13 is inserted into the notch groove 41. The core slot 13 extends along the length direction of the corresponding core branch 12 and extends to both ends of the length direction thereof, that is, both ends of the length direction of the core slot 13 are flush with both ends of the length direction of the core branch 12, and the notch groove 41 extends along the length direction of the corresponding second stator core 4 and extends to both ends of the length direction thereof, that is, the notch groove 41 penetrates both ends of the length direction of the second stator core 4, preferably, the length of the notch groove 41 is equal to the length of the core slot 13. Referring to fig. 1, the second stator core 4 can be inserted into the first stator core 1 only in the up-down direction.

The winding insulation framework 2 comprises a surrounding part 21, the winding insulation framework 3 is wound on the periphery of the winding insulation framework 2, the winding insulation framework 3 is wound on the periphery of the surrounding part 21, the surrounding part 21 is provided with a through framework through hole 25, the winding insulation framework 2 further comprises an outer supporting plate 22 and an inner supporting plate 23, the outer supporting plate 22 is connected to the outer end of the surrounding part 21, the outer supporting plate 22 exceeds the periphery of the surrounding part 21, the inner supporting plate 23 is connected to the inner end of the surrounding part 21, the inner supporting plate 23 exceeds the periphery of the surrounding part 21, and the framework through hole 25 simultaneously penetrates through the outer supporting plate 22 and the inner supporting plate 23. The outer edges of the stator windings 3 do not extend beyond the outer edges of the outer support plate 22 and the inner support plate 23.

Referring to fig. 7, the inner end of the inner support plate 23 is provided with two positioning protrusions 24, the two positioning protrusions 24 extend along the length direction of the inner support plate 23, the two positioning protrusions 24 are respectively located at two sides, and the surfaces of the two positioning protrusions 24 close to each other are arc-shaped portions. Referring to fig. 3, after installation, the arc-shaped portion of each positioning protrusion 24 at least partially fits the arc-shaped groove 14, the arc-shaped portions of two positioning protrusions 24 fit in each arc-shaped groove 14, and the arc-shaped portions of the two positioning protrusions 24 respectively belong to two adjacent winding insulation frameworks 2.

The iron core branch 12 penetrates through the winding insulation framework 2, the outer end of the iron core branch 12 is connected with the second stator iron core 4, and the outer end of the iron core branch 12 exceeds the outer supporting plate 22.

The wedge-shaped key 5 is inserted between the inner wall of the winding insulation framework 2 and the outer wall of the iron core branch 12 in a fitting manner, namely, after the iron core branch 12 penetrates through the framework through hole 25, a gap is reserved between the iron core branch 12 and the winding insulation framework 2, specifically, gaps are reserved at two ends of the iron core branch 12 in the length direction, one wedge-shaped key 5 is respectively inserted at two ends of each iron core branch 12, the wedge-shaped key 5 comprises a key insertion part 51, the wedge-shaped key 5 further comprises a key abutting part 52, and the key abutting part 52 is integrally formed on the outer edge of the key insertion part 51 with reference to fig. 5.

One side of the key insertion part 51 forms a beveled part 53, and the side wall of the framework through hole 25 forms a beveled part attached to the beveled part 53. And wedge-shaped keys 5 are attached and abutted to two end faces of the second stator core 4. The side walls of the framework through hole 25 refer to the side walls at two ends in the length direction, the wedge-shaped key 5 is inserted into the back oblique edge part 53 and attached to the oblique plane part of the framework through hole 25, the plane part at the other side of the key insertion part 51 is attached to the end surface in the length direction of the iron core branch 12, with reference to fig. 5, the inner side end surface of the key insertion part 52 is attached to abut against the outer side end surface of the outer support plate 22, and the plane part at the other side of the key insertion part 51 is attached to abut against the end surface in the length direction of the second stator iron core.

Stator interference fit installs in stator support 9's outer wall, the inner wall of iron core ring body 11 and the outer wall interference fit of stator support inner ring part 91, stator support 9 includes integrated into one piece's stator support inner ring part 91 and stator support outer ring part 92, and the outer wall of stator support inner ring part 91 forms the step position to figure 1 is for referring to, and stator interference fit installs the step position that supports stator support inner ring part 91 outer wall in the outer wall of stator support 9 and the lower extreme of stator, specifically is that the iron core ring body 11 interference fit of first stator core 1 installs the step position that supports stator support inner ring part 91 outer wall in the outer wall of stator support 9 and the lower extreme of iron core ring body 11.

The lower end surface of the stator support outer ring part 92 is circumferentially and uniformly provided with support fixing holes 94, and the stator support 9 can be fixed to a machine frame (not shown in the figure) through the support fixing holes 94.

A stator holder outer ring 92 has a holder seal groove 93 formed in an upper end surface at an outer edge thereof.

The rotor comprises a rotor support 6, magnetic steel 7, a spacing bar 71, a deformation reed 72, a rotor pressing plate 73 and a rotating shaft 8, wherein the rotor support 6 comprises a rotor ring part 63 and a support disc part 64 which are integrally formed, the support disc part 64 is formed by inwards extending the inner edge of the upper end of the rotor ring part 63 by taking fig. 10 as a reference, and a disc part central hole 65 is arranged at the center of the support disc part 64.

The rotor ring 63 has a plurality of carrier seal grooves 62 formed at the lower end thereof. The carrier seal groove 62 and the carrier seal groove 93 cooperate to form a labyrinth seal, i.e., the concave portion and the convex portion of both are inserted into each other to form a gap.

The upper end of rotor ring portion 63 is equipped with magnet steel groove 61, magnet steel 7 circumference equipartition is located in magnet steel groove 61 and the laminating is equipped with spacer 71 between two adjacent magnet steel 7, and magnet steel 7 and spacer 71 cooperate to fill up a round magnet steel groove 61 promptly, and magnet steel 7 and spacer 71 are isometric, and with figure 10 as the reference, there is still certain distance between the top of magnet steel 7 and spacer 71 and the top of magnet steel groove 61.

Referring to fig. 9, the inner and outer walls of the magnetic steel 7 and the spacer 71 are in clearance fit with the inner and outer walls of the magnetic steel groove 61, two side walls of the magnetic steel 7 are inclined surfaces, and two side walls of the spacer 71 are attached to the inclined surfaces of two adjacent magnetic steels 7.

With reference to fig. 10, the upper end surface of the magnetic steel 7 is provided with a deformation reed 72 in a fitting manner, the deformation reed 72 is mounted on the bracket disc part 64 through a rotor pressing plate 73 and is pressed against the deformation reed 72, the deformation reed 72 has elastic deformation capability, the rotor pressing plate 73 is mounted on the upper end surfaces of the bracket disc part 64 and the rear end surface of the rotor pressing plate 73 are flush, the outer diameter of the rotor pressing plate 73 is equal to the outer diameter of the rotor ring part 63, the rotor pressing plate 73 comprises an insertion part inserted into the upper end of the magnetic steel groove 61, the lower end surface of the insertion part is abutted against the upper end surface of the deformation.

The rotor is located at the periphery of the stator, and with reference to fig. 1, the magnetic steel 7 is over against the peripheries of the first stator core 1, the second stator core 4 and the stator winding 3.

The upper end of stator support inner ring portion 91 is equipped with interior annular portion groove 95, and the lower extreme circumference equipartition of stator support inner ring portion 91 is equipped with oil gallery 96, oil gallery 96 intercommunication inner ring portion groove 95, and oil return pipe 98 is all installed to every oil gallery 96, and oil return pipe 98 unifies the cooling tank (not drawn in the picture) that inserts the lower extreme.

The rotating shaft 8 and the bracket disc part 64 are installed in an interference fit mode, namely the rotating shaft 8 is installed in the disc part center hole 65 in the interference fit mode.

The rotating shaft 8 comprises a rotating shaft branch pipe 81, a first bearing 86 is installed on the inner wall of the upper end of the rotating shaft branch pipe 81, a connecting pipe 87 is installed on the inner ring of the first bearing 86 in an interference fit mode, the connecting pipe 87 can be in threaded connection with an oil pipe, and therefore the connecting pipe 87 and the oil pipe can be kept in a fixed state when the rotating shaft branch pipe 81 rotates.

The outer wall of the upper end of the shaft branch 81 is provided with a thread, and a blade (not shown in the figure) can be connected through the thread.

The upper end of the rotating shaft branch pipe 81 is provided with a branch pipe groove 82, and a first bearing 86 is arranged in the branch pipe groove 82.

Referring to fig. 1, oil pipes 83 are uniformly distributed around the rotating shaft branch pipe 81, the oil pipes 83 are provided with a bending part, the oil pipes 83 are divided into a transverse pipe and a longitudinal pipe which are communicated with each other through the bending part, the upper ends of the oil pipes 83 are communicated with the branch pipe grooves 82, that is, the inner ends of the transverse pipes of the oil pipes 83 are communicated with the branch pipe grooves 82, and the upper ends of the transverse pipes of the oil pipes 83 abut against the lower end face of the bracket disc part 64. The oil pipe 83 extends into the inner annular groove 95, oil pipe holes 84 are formed in the outer edge of the oil pipe 83, the oil pipe holes 84 are distributed at intervals up and down, namely, at least part of the longitudinal pipe extends into the inner annular groove 95, the oil pipe holes 84 are distributed in the longitudinal pipe, and relative to the rotating shaft branch pipe 81 located at the center, the oil pipe holes 84 are located in the outermost edge of the oil pipe 83, namely, no matter where the oil pipe 83 rotates, the oil pipe holes 84 are opposite to the annular outer wall of the inner annular groove 95.

The outer side of the stator frame outer ring portion 92 is sealingly fitted with the rotor ring portion 63. Specifically, for laminating between stator support outer ring portion 92's the outside and rotor ring portion 63 and establishing sealed 97, sealed 97 is the polytetrafluoroethylene material, and sealed 97 interference fit installs in stator support outer ring portion 92, and the rotatory sealed 97 that nevertheless seals of during operation rotor ring portion 63 is static.

The lower part of the rotating shaft branch pipe 81 is inserted into the center of the stator support inner ring part 91, and the outer wall of the rotating shaft branch pipe 81 is connected with the inner wall of the stator support inner ring part 91 through the second bearing 88 and the third bearing 89 which are distributed at intervals up and down, so that the rotating shaft branch pipe 81 rotates and the stator support 9 does not move.

The lower extreme of third bearing 89 passes through snap ring 810 location, shield 811 is installed in the lower extreme inner wall interference fit of ring portion 91 in the stator support. Referring to fig. 1, the upper end of the dust cap 811 abuts against the lower end of the retainer ring 810, the lower end of the dust cap 811 is flush with the lower end of the stator frame 9, and the dust cap 811 blocks the central lower end of the stator frame 9 to prevent dust and impurities from entering from below.

The baffle 85 is installed on the outer wall of the upper portion of the oil pipes 83 in a sleeved mode, and an O-shaped ring is arranged between the annular inner wall and the annular outer wall of the baffle 85 and the circumferential side wall of the inner annular groove 95 in a clearance fit mode. That is, the outer annular wall of the baffle 85 and the outer circumferential wall of the inner annular groove 95 are in clearance fit and are provided with O-rings, and with reference to fig. 1, two O-rings may be provided. The annular inner wall of the baffle 85 and the circumferential inner wall of the inner annular groove 95 are clearance fitted and fitted with O-rings, one of which may be fitted, with reference to fig. 1. When the oil pipe 83 rotates, the baffle 85 also rotates together, and the sealing effect is ensured by the O-shaped ring, so that dust and impurities cannot enter the inner annular groove 95 from top to bottom.

A method for assembling a motor comprises the following steps of respectively assembling a stator, a rotor and a stator bracket 9, then assembling the stator into the outer wall of the stator bracket 9 in an interference fit manner, and then assembling the rotor on the stator bracket 9;

the assembling steps of the stator are as follows: winding a stator winding 3 outside each winding insulation framework 2, inserting each winding insulation framework 2 into an iron core branch 12 of a first stator iron core 1 until a circular arc-shaped part of a positioning bulge 24 is attached to an arc-shaped groove 14, leaving a gap between the iron core branch 12 and the winding insulation framework 2, specifically, leaving a gap at two ends of the iron core branch 12 in the length direction, inserting a wedge-shaped key 5 between the inner wall of the winding insulation framework 2 and the outer wall of the iron core branch 12, inserting the wedge-shaped key 5 only at one side, installing a second stator iron core 4, enabling one end face of the second stator iron core 4 to be attached to the wedge-shaped key 5 at one side, then inserting the wedge-shaped key 5 at the other side (referring to figure 1, firstly inserting the wedge-shaped key 5 at the lower part, enabling the upper end face of the wedge-shaped key 5 at the lower part to be attached to the lower end face of the second stator iron core 4, inserting the second stator iron core 4 from, the lower end face of the upper wedge key 5 is abutted against the upper end face of the second stator core 4); and then the whole stator is arranged on the outer wall of the stator support 9 in an interference fit manner, namely the iron core ring body 11 of the first stator iron core 1 is arranged on the outer wall of the stator support 9 in an interference fit manner, and the lower end of the iron core ring body 11 is propped against the step part on the outer wall of the inner ring part 91 of the stator support.

The assembling steps of the rotor are as follows: put into magnet steel 7 and space bar 71 and guarantee that the upper end of magnet steel 7 and space bar 71 flushes in proper order in rotor holder 6's magnet steel groove 61 internal circumference, put into in magnet steel groove 61 and warp reed 72, warp the reed 72 and support the upper end of magnet steel 7 and space bar 71, installation rotor clamp plate 73 makes rotor clamp plate 73's lower extreme butt warp reed 72, 8 interference fit in rotor holder 6's of pivot upper end center, 8 outer wall circumference equipartition of pivot is equipped with oil pipe 83, use figure 1 as the reference, rotor holder 6's upper end center is packed into to up interference fit down to pivot 8, support rotor holder 6 up to oil pipe 83's upper end.

The steps of mounting the rotor on the stator frame 9 are: second bearing 88 and third bearing 89 are adorned into to the inner wall at stator support 9, install sealed 97 interference fit in stator support outer ring portion 92, pass second bearing 88 and third bearing 89 with the pivot 8 of rotor from last down interference fit, a plurality of oil pipe 83 of the circumference equipartition of rotor correspond and stretch into stator support 9's interior annular groove 95, overlap locate between the outer wall of baffle 85 outside oil pipe 83 and the circumference lateral wall in interior annular groove 95 be clearance fit and be equipped with O shape circle between the two.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. A motor for unmanned aerial vehicle, includes stator, rotor and stator support (9), its characterized in that: the stator is installed on the outer wall of a stator support (9) in an interference fit mode, the rotor is located on the periphery of the stator, the stator comprises a first stator iron core (1), a winding insulation framework (2), a stator winding (3), a second stator iron core (4) and wedge-shaped keys (5), the first stator iron core (1) comprises an iron core ring body (11) and iron core branches (12) which are circumferentially and uniformly distributed on the outer wall of the iron core ring body (11), the stator winding (3) is wound on the periphery of the winding insulation framework (2), the iron core branches (12) penetrate through the winding insulation framework (2) and the outer ends of the iron core branches (12) are connected with the second stator iron core (4), the wedge-shaped keys (5) are attached and inserted between the inner wall of the winding insulation framework (2) and the outer wall of the iron core branches (12), the stator support (9) comprises an integrally formed stator support inner ring part (91) and a stator support, the utility model discloses a rotor structure, including iron core ring body (11), the inner wall of stator support inner ring portion (91) and the outer wall interference fit of stator support inner ring portion (91), the upper end of stator support inner ring portion (91) is equipped with interior annular groove (95), and the lower extreme circumference equipartition of stator support inner ring portion (91) is equipped with oil gallery (96), oil gallery (96) intercommunication inner ring portion groove (95), the rotor includes rotor support (6), magnet steel (7), spacer (71), deformation reed (72), rotor clamp plate (73) and pivot (8), rotor support (6) include integrated into one piece's rotor ring portion (63) and support dish portion (64), the upper end of rotor ring portion (63) is equipped with magnetism steel channel (61), just the laminating is equipped with spacer (71) between two adjacent magnet steel (7) in magnet steel channel (61) and through rotor clamp plate (73), magnet steel (7) up end laminating is equipped with deformation reed (72) and will change dish portion (64) and install in support dish portion (64) and through rotor Shape reed (72) compress tightly, pivot (8) and support disc portion (64) interference fit installation, pivot (8) are including pivot branch pipe (81), the upper end of pivot branch pipe (81) is equipped with branch pipe groove (82), and pivot branch pipe (81) circumference equipartition is equipped with oil pipe (83), the upper end intercommunication branch pipe groove (82) of oil pipe (83), oil pipe (83) stretch into inner ring portion groove (95) and oil pipe (83) the outer fringe be equipped with about interval distribution oil pipe hole (84), the outside and rotor ring portion (63) seal assembly of stator support outer ring portion (92).

2. A motor for a drone according to claim 1, characterized in that: the outer end of the iron core branch (12) is provided with an iron core socket part (13) protruding outwards, the inner end of the second stator iron core (4) is provided with a notch groove (41) matched with the shape of the iron core socket part (13), and the iron core socket part (13) is inserted into the notch groove (41).

3. A motor for a drone according to claim 1, characterized in that: and the two end faces of the second stator core (4) are respectively jointed and abutted with a wedge-shaped key (5).

4. A motor for a drone according to claim 1, characterized in that: the lower part of pivot branch pipe (81) inserts the center of stator support inner ring portion (91) and the outer wall of pivot branch pipe (81) is connected through upper and lower interval distribution's second bearing (88) and third bearing (89) between the inner wall of stator support inner ring portion (91), the lower extreme of third bearing (89) is passed through snap ring (810) and is fixed a position, shield (811) are installed to the lower extreme inner wall interference fit of stator support inner ring portion (91).

5. A motor for a drone according to claim 1, characterized in that: the upper outer wall of a plurality of oil pipes (83) is sleeved with a baffle (85) together, and an O-shaped ring is arranged between the annular inner wall and the annular outer wall of the baffle (85) and the circumferential side wall of the inner annular groove (95) in a clearance fit mode.

6. A motor for a drone according to claim 1, characterized in that: winding insulation skeleton (2) are including surrounding portion (21), stator winding (3) twine in the periphery of surrounding portion (21), surrounding portion (21) are equipped with skeleton through-hole (25) that run through, wedge key (5) are including key grafting portion (51), one side of key grafting portion (51) forms bevel portion (53), the lateral wall of skeleton through-hole (25) forms the inclined plane position of laminating with bevel portion (53).

7. A method of assembling an electric machine according to any of claims 1-6, characterized in that: the method comprises the following steps of respectively assembling a stator, a rotor and a stator bracket (9), then installing the stator into the outer wall of the stator bracket (9) in an interference fit manner, and then installing the rotor on the stator bracket (9);

the assembling steps of the stator are as follows: winding a stator winding (3) outside each winding insulation framework (2), inserting each winding insulation framework (2) into an iron core branch (12) of a first stator iron core (1), inserting a wedge-shaped key (5) between the inner wall of each winding insulation framework (2) and the outer wall of each iron core branch (12), inserting the wedge-shaped key (5) into only one side of the wedge-shaped keys, loading a second stator iron core (4), enabling one end face of the second stator iron core (4) to be tightly attached to the wedge-shaped key (5) on one side, and then inserting the wedge-shaped key (5) on the other side;

the assembling steps of the rotor are as follows: put into magnet steel (7) and space bar (71) in proper order and guarantee that the upper end of magnet steel (7) and space bar (71) flushes in the magnetic steel groove (61) of rotor support (6) internal circumference, put into deformation reed (72) in magnet steel groove (61), deformation reed (72) support the upper end of magnet steel (7) and space bar (71), installation rotor clamp plate (73) make the lower extreme butt deformation reed (72) of rotor clamp plate (73), the upper end center of rotor support (6) is packed into in pivot (8) interference fit.

8. The assembling method of an electric motor according to claim 7, wherein: the step of mounting the rotor on the stator support (9) is as follows: second bearing (88) and third bearing (89) are adorned into to the inner wall at stator support (9), pass second bearing (88) and third bearing (89) from last down interference fit with pivot (8) of rotor, a plurality of oil pipe (83) of the circumference equipartition of rotor correspond and stretch into inner ring portion groove (95) of stator support (9), the cover is located and is equipped with O shape circle for clearance fit and between the circumferential side wall of outer wall of baffle (85) outside oil pipe (83) and inner ring portion groove (95).

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