CN219436838U - Outer rotor axial magnetic field motor - Google Patents

Abstract

The utility model discloses an outer rotor axial magnetic field motor which comprises a first rotor, a second rotor and a stator, wherein the first rotor comprises a first rotor frame, the second rotor comprises a second rotor frame, the first rotor frame comprises a first disc body and an annular shell which are integrally formed, the annular shell is arranged at the periphery of the first disc body, the annular shell extends towards the second rotor frame along the axial direction of the first disc body, the second rotor frame comprises a second disc body, and the second disc body is buckled with the annular shell and is connected with the annular shell to form a shell. The shell of the utility model has low assembly degree, high assembly efficiency and higher stability in the use process. And secondly, the connection between the first rotor frame and the second rotor frame only needs to be realized by connecting the annular shell with the second disc body, and the connection parts are fewer, so that the noise source is reduced. In addition, the utility model does not need to overlap with an extra connecting piece in the radial direction, thereby reducing the radial dimension of the shell and being beneficial to the use of the external rotor axial magnetic field motor.

Description

Outer rotor axial magnetic field motor

Technical Field

The utility model relates to the field of motors, in particular to an outer rotor axial magnetic field motor.

Background

An external rotor axial field motor mostly includes two rotors and a stator, the stator being disposed between the two rotors. The rotor mostly comprises a rotor frame, back iron and magnetic steel. In the prior art, after the two rotors and the stator are assembled, the rotor frames of the two rotors are also required to be connected into a whole through an annular connecting shell. The two ends of the annular connecting shell are respectively lapped on the two rotor frames, and then the annular connecting shell is connected with the two rotor frames through connecting pieces such as bolts. However, the arrangement of the annular connecting shell increases the radial dimension of the outer rotor axial magnetic field motor, thereby being unfavorable for the use of the outer rotor axial magnetic field motor. And the casing of external rotor axial magnetic field motor is by first rotor frame, second rotor frame and annular coupling shell triplex integrated, and the degree of assembly is great to the equipment degree of difficulty has been increaseed, has reduced the stability of use, simultaneously because the both ends all need be connected about the annular coupling shell, leads to the junction site more, thereby has increaseed the noise source.

Therefore, how to reduce the radial dimension of the outer rotor axial magnetic field motor, and simultaneously reduce the assembly difficulty, improve the use stability and reduce the noise source is a critical problem to be solved by those skilled in the art.

Disclosure of Invention

The utility model aims to reduce the radial size of an outer rotor axial magnetic field motor, reduce the assembly difficulty, improve the use stability and reduce the noise source. In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an external rotor axial magnetic field motor, includes first rotor, second rotor and is located first rotor with stator between the second rotor, first rotor includes first rotor frame, the second rotor includes the second rotor frame, first rotor frame includes first disk body and annular shell, the annular shell sets up the periphery department of first disk body, just the annular shell is along the axial of first disk body and towards the second rotor frame extends, the second rotor frame includes the second disk body, the second disk body with annular shell looks lock and connection form the casing of external rotor axial magnetic field motor.

Preferably, a plurality of first bolt holes are formed in the periphery of one end, close to the second rotor frame, of the annular shell, a plurality of second bolt holes are formed in the periphery of the second disc body, the first bolt holes correspond to the second bolt holes one by one, and first locking bolts penetrate through the corresponding first bolt holes and the corresponding second bolt holes in sequence so as to lock the annular shell and the second disc body.

Preferably, the first bolt hole is a threaded hole, the second bolt hole is a smooth hole, and is a through hole.

Preferably, a first spigot is formed on the inner wall of the annular shell, which is close to one end of the second disc body, a second spigot is formed on the second disc body in an extending manner along the axial direction, and the first spigot is matched with the second spigot.

Preferably, the rotary shaft is connected with the first disc body, and the rotary shaft extends out from one side of the first disc body, which is opposite to the second disc body;

in the annular shell, a bearing group is sleeved on the rotating shaft, a bearing sleeve is sleeved outside the bearing group, the bearing sleeve extends out of one side, opposite to the first disc body, of the second disc body and is connected with the mounting frame, and the stator is positioned in the annular shell and sleeved on the bearing sleeve.

Preferably, a plurality of third bolt holes are formed in the end portion of the bearing sleeve, extending from the second disc body, the third bolt holes extend along the axial direction of the bearing sleeve, the third bolt holes are arranged around the axis of the bearing sleeve, a plurality of fourth bolt holes are formed in the mounting frame, the third bolt holes and the fourth bolt holes are in one-to-one correspondence, and the second locking bolts sequentially penetrate through the corresponding third bolt holes and the fourth bolt holes to lock the mounting frame and the bearing sleeve.

Preferably, the bearing sleeve is further embedded with a cooling liquid channel and a wire passing hole, and the mounting frame is provided with a water nozzle communicated with the cooling channel.

Preferably, the bearing set comprises a first bearing arranged close to the first disc and a second bearing arranged close to the second disc;

a shaft shoulder is formed on the rotating shaft and used for blocking an inner ring of the first bearing, the shaft shoulder is close to the first disc body relative to the first bearing, a first stop shoulder is formed on the inner wall of the bearing sleeve and used for blocking an outer ring of the first bearing, and the first stop shoulder is far away from the first disc body relative to the first bearing;

the bearing sleeve is characterized in that a second retaining shoulder is further formed on the inner wall of the bearing sleeve and used for blocking the outer ring of the second bearing, the second retaining shoulder is close to the first disc body relative to the second bearing, a round nut is arranged on one side, away from the first disc body, of the second bearing, and the round nut is arranged on the rotating shaft and used for blocking the inner ring of the second bearing.

Preferably, the first bearing is a deep groove ball bearing, and the second bearing is a double row angular contact ball bearing.

Preferably, the rotating shaft extends into a part of the bearing sleeve extending out of the second disc body, a rotary transformer is arranged in a part of the bearing sleeve extending out of the second disc body, the rotary transformer comprises a rotating part and a fixing part, the rotating part is sleeved on the rotating shaft, and one end of the fixing part, which is far away from the second disc body, is arranged in a mounting blind hole of the mounting frame; the periphery of the fixing part is provided with an annular bulge, and the bearing sleeve is provided with an annular groove matched with the annular bulge.

From the technical scheme, the following can be seen: the shell of the outer rotor axial magnetic field motor comprises a first rotor frame and a second rotor frame, and the first rotor frame and the second rotor frame are mutually buckled and connected to form the complete shell, so that the shell is low in assembly degree, high in assembly efficiency and high in stability in the use process. And secondly, the connection between the first rotor frame and the second rotor frame only needs to be realized by connecting the annular shell with the second disc body, and the connection parts are fewer, so that the noise source is reduced. In addition, the utility model does not need to overlap with an extra connecting piece in the radial direction, thereby reducing the radial dimension of the shell and being beneficial to the use of the external rotor axial magnetic field motor.

Drawings

In order to more clearly illustrate the solution of the embodiments of the present utility model, the following description will briefly explain the drawings needed to be used in the embodiments, it being evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a side view of an outer rotor axial field motor provided in an embodiment of the present utility model;

FIG. 2 is an exploded view of an external rotor axial field motor according to an embodiment of the present utility model;

FIG. 3 is a first isometric view of an outer rotor axial field motor according to an embodiment of the present utility model;

FIG. 4 is a second axial view of an outer rotor axial field motor according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a second rotor according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a first rotor according to an embodiment of the present utility model.

Fig. 7 is a schematic structural diagram of a mounting frame according to an embodiment of the present utility model.

The first rotor is 1, the first disc is 11, the annular shell is 12, the first back iron is 13, the first magnetic steel is 14, the first bolt hole is 15, the first spigot is 16, the shaft fixing hole is 17, the second rotor is 2, the second disc is 21, the second back iron is 22, the second magnetic steel is 23, the second spigot is 24, the second bolt hole is 25, the stator is 3, the mounting frame is 4, the second locking bolt is 41, the water nozzle is 42, the square ring is 43, the mounting hole is 44, the mounting blind hole is 45, the fourth bolt hole is 46, the water nozzle through hole is 47, the water joint threaded hole is 48, the rotating shaft is 5, the first bearing is 51, the second bearing is 52, the round nut is 53, the bearing sleeve is 54, the rotary transformer is 6, and the first locking bolt is 7.

Detailed Description

The utility model discloses an outer rotor axial magnetic field motor, which is used for reducing the radial size of the outer rotor axial magnetic field motor, reducing the assembly difficulty, improving the use stability and reducing the noise source.

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 fall within the scope of the utility model.

The description as it relates to "first", "second", etc. in the present utility model is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

Please refer to fig. 1-7.

The utility model discloses an outer rotor axial magnetic field motor, which comprises: the first rotor 1, the second rotor 2 and the stator 3 between the first rotor 1 and the second rotor 2 are double-rotor single-stator motors. The first rotor 1 includes a first rotor frame, a first back iron 13 provided on the first rotor frame, and a plurality of first magnetic steels 14 provided on the first back iron 13. The second rotor 2 includes a second rotor frame, a second back iron 22 provided on the second rotor frame, and a plurality of second magnetic steels 23 provided on the second back iron 22. In particular, the first rotor frame in the present utility model includes the first disk 11 and the annular shell 12 integrally formed, and the annular shell 12 may be regarded as being formed extending from the outer periphery of the first disk 11 in the axial direction and toward the second rotor frame. The first rotor frame may be generally regarded as U-shaped. The second rotor frame comprises a second disc 21. The second disk 21 is substantially a flat disk. The second disk 21 is buckled and connected with the annular shell 12 of the first rotor frame, so that a shell of the outer rotor axial magnetic field motor is formed. The first back iron 13, the second back iron 22, the first magnetic steel 14, the second magnetic steel 23 and the stator 3 are all positioned in the machine shell.

The shell of the outer rotor axial magnetic field motor comprises a first rotor frame and a second rotor frame, and the first rotor frame and the second rotor 2 are mutually buckled and connected to form a complete shell, so that the shell is low in assembly degree, high in assembly efficiency and high in stability in the use process. Second, the connection of the first rotor frame and the second rotor frame is only needed to connect the annular shell 12 with the second disc 21, and the connection parts are fewer, so that the noise source is reduced. In addition, the utility model does not need to overlap with an extra connecting piece in the radial direction, thereby reducing the radial dimension of the shell and being beneficial to the use of the external rotor axial magnetic field motor.

In addition, the materials of the first rotor frame and the second rotor frame may be preferably high-strength metals such as aluminum.

A plurality of hole seats are arranged on the periphery of one end, close to the second rotor frame, of the annular shell 12, a first bolt hole 15 is arranged on each hole seat, and a plurality of first bolt holes 15 are uniformly distributed around the circumferential direction of the annular shell 12. The outer periphery of the second disk body 21 is provided with a plurality of hole seats, and each hole seat is provided with a second bolt hole 25, so that a plurality of second bolt holes 25 are uniformly distributed along the circumferential direction of the second disk body 21. The plurality of first bolt holes 15 are in one-to-one correspondence with the plurality of second bolt holes 25. The first bolt holes 15 and the second bolt holes 25 corresponding to each other are fitted with the first locking bolts 7, so that the annular shell 12 and the second disk 21, i.e., the first rotor 1 frame and the second rotor frame, are locked by the plurality of first locking bolts 7. The bolt connection is firm in connection and convenient to detach.

Although the first bolt holes 15 are provided in the radial direction of the annular case 12 and the second bolt holes 25 are provided in the radial direction of the second disk 21, the hole diameters of the first bolt holes 15 and the second bolt holes 25 are small, and thus the influence is small compared with the diameter of the entire case. In addition, the first bolt hole 15 and the second bolt hole 25 are provided near the second disk body 21, and are offset-type, and even if the radial dimension is affected by the arrangement of the first bolt hole 15 and the second bolt hole 25, the radial dimension of the large surface of the casing is not affected because the first bolt hole 15 and the second bolt hole 25 are offset-type on the casing.

After the first rotor frame and the second rotor frame are buckled, the first back iron 13 is arranged on the end face of the first disc 11 facing the second disc 21, and the first magnetic steel 14 is arranged on the end face of the first back iron 13 facing the second disc 21. The second back iron 22 is provided on an end face of the second disk body 21 facing the first disk body 11, and the second magnetic steel 23 is provided on an end face of the second back iron 22 facing the second disk body 21. The stator 3 is located between the first magnetic steel 14 and the second magnetic steel 23, and the stator 3 is located in an annular cavity surrounded by the annular shell 12 of the first rotor frame. Since the second disk 21 is a flat disk, the portion of the second magnetic steel 23 protruding from the second disk 21 is also located in the annular cavity of the annular shell 12. The first rotor frame can thus be regarded as a box and the second rotor frame as a cover.

The present utility model provides the first bolt hole 15 as a threaded hole, and since the axial dimension of the annular housing 12 is large, a threaded hole of sufficient length can be provided to achieve firm thread locking. Meanwhile, since the axial dimension of the second disk 21 is small, the second bolt hole 25 is provided as a light hole and as a through hole. The first locking bolt 7 is thus threaded into the threaded hole after passing through the through hole. Since the second disk 21 is thin in the axial direction, the first lock bolt 7 is mounted from the second disk 21 side without interference. The first lock bolt 7 is interfered with by the annular housing 12 if it is mounted from the annular housing 12 side.

In order to facilitate the buckling of the first rotor frame and the second rotor frame, the utility model is provided with a first spigot 16 on the inner wall of one end of the annular shell 12 near the second disc 21, and a second spigot 24 is formed on the second disc 21 along the axial direction and extending towards the first disc 11. During the snap-fit process, the first spigot 16 and the second spigot 24 prove snap-fit in place when they are blocked from each other.

The following continues to describe the internal structure of the outer rotor axial field motor: the outer rotor axial magnetic field motor further comprises a rotating shaft 5. The rotary shaft 5 is arranged along the axial direction of the casing. The rotary shaft 5 is connected with the first disk 11 by a fixing bolt, and the rotary shaft 5 extends from a side of the first disk 11 facing away from the second disk 21. In the annular shell 12, a bearing set is sleeved on the rotating shaft 5, a bearing sleeve 54 is sleeved outside the bearing set, and the bearing sleeve 54 extends out of one side of the second disc 21, which is opposite to the first disc 11, and is connected with the mounting frame 4, and the mounting frame 4 is used for being connected with external equipment. The stator 3 is located within the annular housing 12 and is sleeved on the bearing housing 54. Thus, the weight of the individual components inside the housing acts on the mounting frame 4 through the bearing housing 54.

The bearing housing 54 is connected to the mounting frame 4 in the following manner: the end of the portion of the bearing housing 54 protruding from the second disk body 21 is provided with a plurality of third bolt holes, which extend in the axial direction of the bearing housing 54, and which are arranged around the axis of the bearing housing 54. The mounting frame 4 is provided with a plurality of fourth bolt holes 46, the third bolt holes are in one-to-one correspondence with the fourth bolt holes 46, and the second locking bolts 41 sequentially penetrate through the corresponding third bolt holes and fourth bolt holes 46 so as to lock the mounting frame 4 with the bearing sleeve 54. Specifically, the third bolt hole is designed as a screw hole, and the fourth bolt hole 46 is provided as a through hole and is a light hole. And the sealing glue is arranged in the matching surface of the second locking bolt 41 and the fourth bolt hole 46 on the mounting frame 4 so as to improve the sealing property.

The bearing housing 54 also has a coolant passage embedded therein to cool the interior of the outer rotor axial field motor. Correspondingly, the mounting frame 4 is provided with a water nozzle 42 communicated with the cooling channel so as to facilitate connection with external cooling equipment. Specifically, the water nozzle 42 is mounted in a water nozzle through hole 47 on the mount 4. The bearing housing 54 is also embedded with wire vias to facilitate routing of the three phase wires. The edge of the mounting frame 4 is provided with a mounting hole 44, and the mounting frame 4 is connected to external equipment through the mounting hole 44. The mounting frame 4 is further provided with a waterproof joint threaded hole 48, and the waterproof joint threaded hole 48 is used for mounting a waterproof joint which is an electrical joint with a waterproof function so as to be electrically connected with external electrical equipment.

The specific design of the bearing group is as follows: the bearing set includes a first bearing 51 and a second bearing 52, the first bearing 51 being disposed adjacent to the first disk 11, the second bearing 52 being disposed adjacent to the second disk 21. The shaft 5 is formed with a shoulder for blocking an inner ring of the first bearing 51, and the shoulder is close to the first disk 11 with respect to the first bearing 51. The bearing housing 54 has a first shoulder formed on an inner wall thereof for blocking an outer race of the first bearing 51, the first shoulder being remote from the first disk 11 with respect to the first bearing 51.

The inner wall of the bearing sleeve 54 is also provided with a second stop shoulder, the second stop shoulder is used for stopping the outer ring of the second bearing 52, the second stop shoulder is close to the first disc 11 relative to the second bearing 52, a round nut 53 is arranged on one side, away from the first disc 11, of the second bearing 52, and the round nut 53 is arranged on the rotating shaft 5 and used for stopping the inner ring of the second bearing 52.

Further, the first bearing 51 is preferably a deep groove ball bearing, and the second bearing 52 is preferably a double row angular contact ball bearing. The axial force of the rotating shaft 5 is received by the double-row angular contact ball bearing, and the radial force of the rotating shaft 5 is received by the combination of the double-row angular contact ball bearing and the deep groove ball bearing. The deep groove ball bearing mainly bears radial load and can bear a certain amount of axial load. Two angular contact ball bearings in the double-row angular contact ball bearing are integrated, so that larger axial and radial compound loads can be borne, and the two angular contact ball bearings do not need to be paired and the gap is adjusted.

The present utility model is also provided with a resolver 6 to measure the rotation speed of the rotation shaft 5. The specific setting mode of the rotary transformer is as follows: if the portion of the bearing housing 54 protruding outside the second disk 21 is defined as a protruding portion, the rotation shaft 5 extends into the protruding portion. A resolver 6 is provided in the extension. The resolver 6 specifically includes a rotating portion and a fixed portion. The rotating part is sleeved on the rotating shaft 5, and one end of the fixing part, which is far away from the second disc body 21, is installed in the installation blind hole 45 of the installation frame 4. The fixing part can be pressed in the mounting blind hole 45 by means of the square ring 43. In addition, an annular protrusion is provided on the outer periphery of the fixing portion, and an annular groove adapted to the annular protrusion is provided on the bearing housing 54, so that axial limitation is formed on the fixing portion.

Finally, it is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. An outer rotor axial magnetic field motor comprises a first rotor (1), a second rotor (2) and a stator (3) arranged between the first rotor (1) and the second rotor (2), wherein the first rotor (1) comprises a first rotor frame, and the second rotor (2) comprises a second rotor frame, and is characterized in that the first rotor frame comprises a first disc body (11) and an annular shell (12) which are integrally formed, the annular shell (12) is arranged at the periphery of the first disc body (11), the annular shell (12) extends along the axial direction of the first disc body (11) and towards the second rotor frame, the second rotor frame comprises a second disc body (21), and the second disc body (21) is buckled with the annular shell (12) and is connected with the annular shell to form a shell of the outer rotor axial magnetic field motor.

2. The outer rotor axial magnetic field motor according to claim 1, wherein a plurality of first bolt holes (15) are provided on an outer periphery of one end of the annular shell (12) near the second rotor frame, a plurality of second bolt holes (25) are provided on an outer periphery of the second disk body (21), the plurality of first bolt holes (15) are in one-to-one correspondence with the plurality of second bolt holes (25), and a first locking bolt (7) penetrates through the corresponding first bolt holes (15) and second bolt holes (25) in order to lock the annular shell (12) and the second disk body (21).

3. The outer rotor axial magnetic field motor according to claim 1, wherein a first spigot (16) is formed on an inner wall of the annular shell (12) near one end of the second disk body (21), a second spigot (24) is formed extending in an axial direction from an outer circumference of the second disk body (21), and the first spigot (16) and the second spigot (24) are fitted.

4. The outer rotor axial magnetic field motor according to claim 1, further comprising a rotating shaft (5), the rotating shaft (5) being connected to the first disk (11), the rotating shaft (5) extending from a side of the first disk (11) facing away from the second disk (21);

in annular shell (12), the cover is equipped with the bearing group on pivot (5), the bearing group overcoat is equipped with bearing housing (54), bearing housing (54) follow second disk body (21) are facing away from one side of first disk body (11) stretches out and is connected with mounting bracket (4), stator (3) are located in annular shell (12) and cover is established on bearing housing (54).

5. The outer rotor axial magnetic field motor according to claim 4, wherein a plurality of third bolt holes are provided on an end portion of the bearing housing (54) protruding from the second disk body (21), the third bolt holes extend along an axial direction of the bearing housing (54), the plurality of third bolt holes are arranged around an axis of the bearing housing (54), a plurality of fourth bolt holes (46) are provided on the mounting bracket (4), the plurality of third bolt holes are in one-to-one correspondence with the plurality of fourth bolt holes (46), and a second locking bolt (41) penetrates through the corresponding third bolt holes and fourth bolt holes (46) in order to lock the mounting bracket (4) with the bearing housing (54).

6. The outer rotor axial magnetic field motor according to claim 4, wherein the bearing sleeve (54) is further embedded with a cooling liquid channel and a wire passing hole, and the mounting frame (4) is provided with a water nozzle (42) communicated with the cooling liquid channel.

7. The external rotor axial magnetic field motor according to claim 4, characterized in that the bearing set comprises a first bearing (51) and a second bearing (52), the first bearing (51) being arranged close to the first disc (11), the second bearing (52) being arranged close to the second disc (21);

the rotating shaft (5) is provided with a shaft shoulder which is used for blocking an inner ring of the first bearing (51), the shaft shoulder is close to the first disc body (11) relative to the first bearing (51), the inner wall of the bearing sleeve (54) is provided with a first blocking shoulder which is used for blocking an outer ring of the first bearing (51), and the first blocking shoulder is far away from the first disc body (11) relative to the first bearing (51);

the bearing sleeve (54) is characterized in that a second stop shoulder is further formed on the inner wall of the bearing sleeve (54), the second stop shoulder is used for stopping the outer ring of the second bearing (52), the second stop shoulder is close to the first disc body (11) relative to the second bearing (52), a round nut (53) is arranged on one side, away from the first disc body (11), of the second bearing (52), and the round nut (53) is arranged on the rotating shaft (5) and used for stopping the inner ring of the second bearing (52).

8. The external rotor axial magnetic field motor according to claim 7, wherein the first bearing (51) is a deep groove ball bearing, and the second bearing (52) is a double row angular contact ball bearing.

9. The outer rotor axial magnetic field motor according to claim 4, characterized in that the rotating shaft (5) extends into a portion of the bearing housing (54) that protrudes outside the second disk body (21), a resolver (6) is provided in a portion of the bearing housing (54) that protrudes outside the second disk body (21), the resolver (6) includes a rotating portion that is sleeved on the rotating shaft (5), and a fixing portion that is installed in an installation blind hole (45) of the installation frame (4) at an end that is remote from the second disk body (21);

the periphery of the fixing part is provided with an annular bulge, and the bearing sleeve (54) is provided with an annular groove matched with the annular bulge.