Inner rotor radial and axial combined magnetic field motor structure

Abstract

The utility model provides an inner rotor radial and axial combined magnetic field motor structure, which comprises a casing, a rotating shaft, a rotor core, at least one axial stator-rotor group and a radial stator-rotor group, the rotor core comprises a rotor core support and a rotor core compression ring which are detachably connected, the rotor core support is located in the casing, and the rotor core compression ring is located in the casing. The rotating shaft passes through the rotor core support and is fixedly connected with the rotor core support. The radial stator-rotor group comprises a radial magnetic field stator and a radial magnetic field rotor; the outer circumference of one end, far away from the rotor iron core pressing ring, of the rotor iron core support extends outwards in the radial direction to form a stopping part, and the radial magnetic field rotor is clamped between the stopping part and the rotor iron core pressing ring. According to the scheme, the rotor iron core support and the rotor iron core pressing ring are detachably connected, and the rotor iron core pressing ring can press the radial magnetic field rotor on the stopping part, so that the rotor iron core pressing ring can be quickly mounted and fixed, and the mounting reliability of the rotor iron core pressing ring can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to permanent magnet motor technical field especially relates to a kind of inner rotor radial and axial combination magnetic field motor structure. BACKGROUND

[0002] Permanent magnet motor provides excitation with permanent magnet, makes motor structure relatively simple, reduces processing and assembly cost, and saves the current collector ring and brush prone to problems, improves the reliability of motor operation;And without excitation current, improve the efficiency and power density of motor. Permanent magnet motor is composed of stator, rotor and cover and other components, and the stator is basically the same as the ordinary induction motor, which adopts lamination structure to reduce the iron loss during motor operation. Rotor can be made into solid, also can be stacked. Armature winding can adopt concentrated full-pitch winding, also can adopt distributed short-pitch winding and unconventional winding.

[0003] Permanent magnet motor can be divided into radial, axial and transverse flux permanent magnet motor according to magnetic flux path, and the patent with publication number CN112994389B discloses an axial-radial flux permanent magnet motor structure, comprising a stator disc, a first outer rotor, a second outer rotor and an inner rotor, the first outer rotor and the second outer rotor are arranged on the two sides of the stator disc and coaxially arranged with the stator disc, the inner rotor is coaxially arranged with the stator disc and passes through the inner hole of the stator disc to be connected with the first outer rotor and the second outer rotor respectively;The stator disc includes stator core and stator winding, the first outer rotor and the second outer rotor are the same structure and symmetrically arranged, and each includes outer rotor core and first permanent magnet, the inner rotor includes inner rotor core and second permanent magnet;Wherein, a plurality of second permanent magnets are arranged in tile shape and wrapped around the outer ring of the inner rotor core. Since a plurality of second permanent magnets are wrapped around the outer ring of the inner rotor core, in order to ensure good fixing effect, a plurality of second permanent magnets need to be fixed on the outer ring of the inner rotor core one by one, which leads to long time consumption of the assembly work of the inner rotor. UTILITY MODEL CONTENTS

[0004] Based on the problems existing in the prior art, the utility model aims at solving the technical problem that the assembly work of the inner rotor in the axial-radial flux permanent magnet motor structure in the prior art needs to consume long time.

[0005] The utility model provides an inner rotor radial and axial combination magnetic field motor structure, which comprises:

[0006] A shell;

[0007] A rotating shaft, both ends of which are rotatably connected to the side walls of both ends of the shell.

[0008] The rotor core comprises a detachably connected rotor core support and rotor core pressing ring, the rotor core support is located inside the casing, and the rotating shaft passes through and is fixedly connected with the rotor core support;

[0009] At least one axial stator-rotor set, the axial stator-rotor set comprises an axial magnetic field stator and an axial magnetic field rotor, the axial magnetic field rotor is fixedly arranged on the end face of the rotor core support, and the axial magnetic field stator is fixedly arranged on the inner wall of the casing opposite to the axial magnetic field rotor;

[0010] A radial stator-rotor set comprises a radial magnetic field stator and a radial magnetic field rotor; the outer circumference of the end of the rotor core support away from the rotor core pressing ring extends radially outward to form a stop portion, the radial magnetic field rotor is clamped between the stop portion and the rotor core pressing ring, and the radial magnetic field stator is fixedly arranged on the outer side of the rotor core support along the radial direction of the rotor core support and is fixedly arranged on the inner wall of the casing.

[0011] According to an embodiment of the utility model, the end face of the rotor core support is recessed inward to form a recessed cavity, and the axial magnetic field rotor is arranged in the recessed cavity.

[0012] According to an embodiment of the utility model, the axial stator-rotor set is arranged in two, and the two axial stator-rotor sets are symmetrically arranged relative to the rotor core support.

[0013] According to an embodiment of the utility model, the axial magnetic field stator comprises a first stator core and a first stator winding arranged on the first stator core.

[0014] According to an embodiment of the utility model, the radial magnetic field stator comprises a second stator core and a second stator winding arranged on the second stator core.

[0015] According to an embodiment of the utility model, the inner rotor radial and axial combined magnetic field motor structure further comprises bearings, and the two ends of the rotating shaft are rotatably connected with the two end side walls of the casing through the bearings.

[0016] According to an embodiment of the utility model, the casing comprises a casing main body and a cover, one end of the casing main body is provided with a first opening, the cover is detachably fixedly arranged at the first opening, and the two ends of the rotating shaft are rotatably connected with the casing main body and the cover.

[0017] According to an embodiment of the utility model, the casing main body and the cover are recessed towards the sides away from each other to form bearing chambers for mounting the bearings.

[0018] According to the inner rotor radial and axial combined magnetic field motor structure of the utility model, the outer side wall of the bearing chamber is provided with a second opening, and the end cover is detachably fixed at the second opening.

[0019] The inner rotor radial and axial combined magnetic field motor structure has the following beneficial effects:

[0020] (1) The rotating shaft can drive the axial magnetic field rotor in the axial stator-rotor group and the radial magnetic field rotor in the radial stator-rotor group to rotate simultaneously through the rotor core, so that the axial magnetic field rotor and the radial magnetic field rotor share one rotor core, without the need to separately arrange respective rotor cores, thereby simplifying the motor structure and facilitating the reduction of the motor volume.

[0021] (2) The rotor core support and the rotor core pressing ring are detachably connected, and the rotor core pressing ring can press the radial magnetic field rotor against the stop portion, thereby achieving the quick installation and fixation of the rotor core pressing ring and ensuring the reliability of the installation of the rotor core pressing ring. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0023] Figure 1 It is a schematic view of the inner rotor radial and axial combined magnetic field motor structure provided by the utility model embodiment.

[0024] The drawings are as follows: 1 - casing, 11 - casing main body, 12 - cover, 2 - rotating shaft, 3 - rotor core, 31 - rotor core support, 310 - stop portion, 311 - cavity, 32 - rotor core pressing ring, 4 - axial stator-rotor group, 41 - axial magnetic field stator, 411 - first stator core, 412 - first stator winding, 42 - axial magnetic field rotor, 5 - radial stator-rotor group, 51 - radial magnetic field stator, 511 - second stator core, 512 - second stator winding, 52 - radial magnetic field rotor, 6 - bearing, 60 - bearing chamber, 7 - end cover. DETAILED DESCRIPTION

[0025] The following description of the embodiments is with reference to the additional drawings, which illustrate specific embodiments that the utility model can be used to implement.

[0026] The utility model provides a kind of inner rotor radial and axial combined magnetic field motor structure, its structure as shown in Figure 1 It is indicated, including shell 1, rotating shaft 2, rotor core 3, at least one axial stator-rotor group 4 and radial stator-rotor group 5, wherein, the both ends of the rotating shaft 2 are respectively rotationally connected with the side wall of the both ends of the shell 1;The rotor core 3 includes detachably connected rotor core support 31 and rotor core pressing ring 32, the rotor core support 31 is located in the inside of the shell 1, and the rotating shaft 2 passes through the rotor core support 31 and is fixedly connected therewith;The axial magnetic field stator 41 and axial magnetic field rotor 42 are included in the axial stator-rotor group 4, the axial magnetic field rotor 42 is fixedly arranged on the end face of the rotor core support 31, and the axial magnetic field stator 41 is fixedly arranged on the inner wall of the shell 1 opposite to the axial magnetic field rotor 42;The radial magnetic field stator 51 and radial magnetic field rotor 52 are included in the radial stator-rotor group 5;The outer circumference of the one end of the rotor core support 31 away from the rotor core pressing ring 32 extends radially to form a stop portion 310, and the radial magnetic field rotor 52 is clamped between the stop portion 310 and the rotor core pressing ring 32;The radial magnetic field stator 51 is fixedly arranged on the outside of the rotor core support 31 along the radial direction of the rotor core support 31 and is fixedly arranged on the inner wall of the shell 1.

[0027] In the radial and axial combined magnetic field motor structure of the utility model, the rotating shaft 2 can drive the axial magnetic field rotor 42 in the axial stator-rotor group 4 and the radial magnetic field rotor 52 in the radial stator-rotor group 5 to rotate simultaneously through the rotor core 3, so that the axial magnetic field rotor 42 and the radial magnetic field rotor 52 share one rotor core 3, without the need to separately arrange respective rotor cores, which can simplify the motor structure and facilitate the reduction of the volume of the motor;In addition, the rotor core support 31 and the rotor core pressing ring 32 are detachably connected, the rotor core pressing ring 32 can press the radial magnetic field rotor 52 (the radial magnetic field rotor 52 is composed of a plurality of circumferentially distributed permanent magnets on the outer circumference of the rotor core support 31) against the stop portion 310, which can not only realize the rapid installation and fixation of the rotor core pressing ring 32, but also ensure the reliability of the installation of the rotor core pressing ring 32.

[0028] Please continue to refer to Figure 1 Specifically, the axial magnetic field stator 41 includes a first stator core 411 and a first stator winding 412 arranged on the first stator core 411.

[0029] Further, the end face of the rotor core support 31 is recessed towards the inside to form a recessed cavity 311, and the axial magnetic field rotor 42 is installed in the recessed cavity 311.

[0030] It can be understood that, in order to realize the installation of the radial magnetic field rotor 52 on the outer circumferential side wall of the rotor core support 31, the rotor core support 31 needs to have a certain thickness, and by recessing the end face of the rotor core support 31 towards the inside to form a recessed cavity 311 for installing the axial magnetic field rotor 42, the weight of the rotor core support 31 can be reduced, and the compactness of the motor structure can be improved.

[0031] Preferably, in order to improve the efficiency of the inner rotor radial and axial combined magnetic field motor structure, the axial stator-rotor set 4 is provided with two, and the two axial stator-rotor sets 4 are symmetrically arranged relative to the rotor core support 31. The two end faces of the rotor core support 31 are respectively recessed towards the inside to respectively form a recessed cavity, and the axial magnetic field rotors 42 in the two axial stator-rotor sets 4 are respectively fixedly installed in the two recessed cavities.

[0032] According to an embodiment of the utility model, in order to realize that the both ends of the rotating shaft 2 are respectively rotatably connected with the side walls of the both ends of the casing 1, the inner rotor radial and axial combined magnetic field motor structure further comprises a bearing 6, and the both ends of the rotating shaft 2 are respectively rotatably connected with the both end side walls of the casing 1 through the bearing 6.

[0033] According to an embodiment of the utility model, the casing 1 comprises a casing main body 11 and a cover 12, one end of the casing main body 11 is provided with a first opening, the cover 12 is detachably fixedly installed at the first opening, and the both ends of the rotating shaft 2 are rotatably connected with the casing main body 11 and the cover 12.

[0034] It can be understood that, by arranging the casing 1 to comprise a casing main body 11 and a cover 12, the installation or connection of the rotating shaft 2, the rotor core 3, the axial stator-rotor set 4 and the radial stator-rotor set 5 and other related structures in the casing 1 can be facilitated.

[0035] Preferably, the casing main body 11 and the cover 12 are respectively recessed towards the sides away from each other to form a bearing chamber 60 for installing the bearing 6; compared with directly installing the bearing 6 in the inner cavity of the casing main body 11, the occupation of the internal space of the casing main body 11 can be reduced, so that the volume of the casing main body 11 can be reduced, and the compactness of the motor structure can be improved.

[0036] Further, the inner rotor radial and axial combined magnetic field motor structure further comprises an end cover 7, a second opening is formed in the outer side wall of the bearing chamber 60, and the end cover 7 is detachably arranged at the second opening.

[0037] It can be understood that, by forming the second openings in the outer side walls of the two bearing chambers 60 (namely, on the shell body 11 and the cover 12) and arranging the end covers 7 at the second openings, when the bearings 6 are arranged in the bearing chambers 60 (at this time, the end covers 7 are not arranged), a larger operation space can be obtained, thereby facilitating the arrangement of the bearings 6 in the bearing chambers 60.

[0038] In summary, in the inner rotor radial and axial combined magnetic field motor structure, the axial magnetic field rotor 42 and the radial magnetic field rotor 52 share one rotor core 3, so that the motor structure can be simplified, and the volume of the motor can be reduced; in addition, the rotor core pressing ring 32 can press the radial magnetic field rotor 52 against the stop portion 310, so that the rotor core pressing ring 32 can be quickly arranged and fixed.

[0039] It should be noted that, although the utility model is disclosed as above with specific embodiments, the above embodiments are not used to limit the utility model, and those skilled in the art can make various changes and decorations without departing from the spirit and scope of the utility model, therefore, the protection scope of the utility model is defined by the claim.

Claims

1. An inner rotor radial and axial combined magnetic field electric machine structure, characterized by, Comprise: A casing (1); A rotating shaft (2) which is rotatably connected to the side walls at both ends of the casing (1); A rotor core (3) comprising a detachably connected rotor core support (31) and a rotor core pressing ring (32), the rotor core support (31) is located inside the casing (1), and the rotating shaft (2) passes through the rotor core support (31) and is fixedly connected thereto; At least one axial stator-rotor group (4) comprising an axial magnetic field stator (41) and an axial magnetic field rotor (42), the axial magnetic field rotor (42) is fixedly arranged on the end face of the rotor core support (31), and the axial magnetic field stator (41) is fixedly arranged on the inner wall of the casing (1) opposite to the axial magnetic field rotor (42); A radial stator-rotor group (5) comprising a radial magnetic field stator (51) and a radial magnetic field rotor (52); the outer circumference of one end of the rotor core support (31) away from the rotor core pressing ring (32) extends radially outward to form a stop portion (310), the radial magnetic field rotor (52) is clamped between the stop portion (310) and the rotor core pressing ring (32); the radial magnetic field stator (51) is fixedly arranged on the outside of the rotor core support (31) along the radial direction of the rotor core support (31) and is fixedly arranged on the inner wall of the casing (1).

2. The structure of the inner rotor radial and axial combined magnetic field motor according to claim 1, wherein the end face of the rotor core support (31) is recessed inward to form a recessed cavity (311), and the axial magnetic field rotor (42) is installed in the recessed cavity (311).

3. The structure of an internal rotor combined radial and axial flux electric machine according to claim 1, characterized in that, Two axial stator-rotor groups (4) are provided, and the two axial stator-rotor groups (4) are symmetrically arranged relative to the rotor core support (31).

4. The structure of an internal rotor combined radial and axial flux electric machine according to claim 1, characterized in that, The axial magnetic field stator (41) comprises a first stator core (411) and a first stator winding (412) arranged on the first stator core (411).

5. The structure of an internal rotor combined radial and axial flux electric machine according to claim 1, characterized in that, The radial magnetic field stator (51) comprises a second stator core (511) and a second stator winding (512) arranged on the second stator core (511).

6. The structure of an internal rotor combined radial and axial flux electric machine according to claim 1, wherein A bearing (6) is further provided, and the two ends of the rotating shaft (2) are rotatably connected to the side walls at both ends of the casing (1) through the bearing (6).

7. A structure of an internal rotor combined radial and axial flux electric machine according to claim 6, characterized in that, The casing (1) comprises a casing body (11) and a cover (12), one end of the casing body (11) is provided with a first opening, the cover (12) is detachably fixedly installed at the first opening, and the two ends of the rotating shaft (2) are rotatably connected to the casing body (11) and the cover (12).

8. A structure of an internal rotor combined radial and axial flux electric machine according to claim 7, characterized in that, The casing body (11) and the cover (12) are recessed towards the sides away from each other respectively to form a bearing chamber (60) for installing the bearing (6).

9. A structure of an internal rotor combined radial and axial flux electric machine according to claim 8, characterized in that, An end cover (7) is further provided, an outer side wall of the bearing chamber (60) is provided with a second opening, and the end cover (7) is detachably fixedly arranged at the second opening.

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