CN216959474U - Rotor core structure and contain its iron core, rotor subassembly - Google Patents

Abstract

The utility model discloses a rotor iron core structure, an iron core containing the rotor iron core structure and a rotor assembly containing the rotor iron core structure, and belongs to the technical field of rotor assemblies. The rotor core structure includes: the iron core body is of a circular sheet structure, a plurality of grooves for weakening torque pulsation are formed in the circumferential outer side of the iron core body at intervals, the grooves are inwards sunken along the radial direction of the iron core body, the grooves extend along the thickness direction of the iron core body, and a through hole is formed in the center of the iron core body; it is equipped with a plurality of installation openings that are used for installing the magnetic stripe still to go back the circumference interval on the iron core body, and a plurality of installation openings are located the periphery of through-hole, forms between two adjacent installation openings to be used for carrying out the magnetism isolating structure that separates the magnetism to installing the magnetic stripe in adjacent installation through-hole respectively. The rotor core structure of the utility model can weaken torque pulsation and prevent magnetism.

Description

Rotor core structure and contain its iron core, rotor subassembly

Technical Field

The utility model relates to the technical field of rotor assemblies, in particular to a rotor core structure, an iron core comprising the rotor core structure and a rotor assembly comprising the rotor core structure.

Background

At present, in a permanent magnet motor and other motor equipment with permanent magnets, because of the existence of the permanent magnets, cogging torque is inevitably existed, which is one of the reasons for generating torque pulsation; when the permanent magnet motor is driven in a variable speed mode, when the torque ripple frequency is consistent with the mechanical resonance frequency of the motor, the generated torque ripple is large, so that vibration and noise generated by the cogging torque are amplified, and when the permanent magnet motor runs at a low speed, the cogging torque can influence the high-precision positioning of a control system, so that the stability of the permanent magnet motor during low-speed running is influenced; in addition, in the existing permanent magnet motor, the utilization rate of the permanent magnet is low due to the fact that the magnetic leakage coefficient of the permanent magnet in the rotor is large. Further, the iron core structure of the rotor in the permanent magnet motor and the iron core of the existing iron core structure are not beneficial to weakening torque pulsation generated by the rotor, and the stability of the permanent magnet motor needs to be improved. Thus, a rotor core structure capable of reducing torque ripple and preventing magnetic leakage is required.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcoming at least one of the deficiencies of the prior art as set forth above, and providing a rotor core structure capable of attenuating torque ripple and preventing leakage of magnetic flux; in addition, an iron core and a rotor assembly are also provided.

The technical scheme for solving the technical problems is as follows: a rotor core structure comprising:

the iron core body is of a circular sheet structure, a plurality of grooves for weakening torque pulsation are formed in the circumferential outer side of the iron core body at intervals, the grooves are inwards sunken along the radial direction of the iron core body, the grooves extend along the thickness direction of the iron core body, and a through hole is formed in the center of the iron core body;

it is equipped with a plurality of installation openings that are used for installing the magnetic stripe, and a plurality of to go back the circumference interval on the iron core body the installation opening is located the periphery of through-hole, adjacent two form between the installation opening and be used for respectively installing adjacent the magnetic isolation structure that magnetic isolation was carried out to magnetic stripe in the installation opening.

The utility model has the beneficial effects that: the plurality of grooves are arranged on the outer side of the iron core body in the circumferential direction at intervals, when a rotor formed by the iron core body is matched with a stator for use, the rotor and the stator rotate relatively, and the grooves can reduce cogging torque, so that torque pulsation is weakened, the consistency of the torque pulsation frequency and the mechanical resonance frequency of a motor in the variable-speed driving process of the motor with the rotor iron core structure in the embodiment is reduced, vibration and noise are reduced, and the stability of the motor with the rotor iron core structure in the embodiment in the low-speed operation process is improved; in addition, a magnetic isolation structure is arranged between the magnetic strips, and magnetic flux reaches saturation through the magnetic isolation structure, so that magnetic flux leakage is limited.

In addition, on the basis of the above technical solution, the present invention may be further improved as follows, and may further have the following additional technical features.

According to one embodiment of the utility model, the mounting through opening is in an isosceles trapezoid structure, when the magnetic strip is mounted in the mounting through opening, gaps are respectively formed between two ends of the magnetic strip in the circumferential direction and the magnetic shielding structures close to the magnetic strip to form torque pulsation weakening openings for weakening torque pulsation.

The installation through opening in the embodiment is in an isosceles trapezoid structure, so that the magnetic stripe can be conveniently and reliably installed; in addition, the magnetic isolation structures in the embodiment are respectively provided with a gap to form a torque ripple weakening port for weakening torque ripple, so that the cogging torque is further reduced, the effect of weakening the torque ripple is improved, the consistency between the torque ripple frequency and the mechanical resonance frequency of the motor is reduced when the motor containing the rotor core structure in the embodiment is driven at variable speed, vibration and noise are reduced, and the stability of the motor of the rotor core structure in the embodiment in low-speed operation is improved.

According to an embodiment of the utility model, the opening size of the mounting through opening on a side close to the through hole is smaller than the opening size on a side remote from the through hole. The opening size is great on one side of the installation opening in this embodiment, and the opening size of opposite side is less, and iron core body is circular sheet structure, is convenient for increase the area of the installation opening of seting up the formation at iron core body, is favorable to the great magnetic stripe of installation size, and the diameter size that can abundant utilization is circular sheet structure's iron core body.

According to an embodiment of the utility model, a first blocking protrusion and a second blocking protrusion are arranged on a side wall of the installation through hole, which is close to the through hole, at intervals, the first blocking protrusion and the second blocking protrusion are respectively arranged close to the magnetic isolation structures at two ends of the installation through hole, and when the magnetic strip is installed in the installation through hole, the magnetic strip is limited between the first blocking protrusion and the second blocking protrusion in the circumferential direction.

The installation opening in this embodiment is close to the interval is equipped with on the lateral wall of through-hole and blocks protruding one and block protruding two, is convenient for inject the magnetic stripe in the circumferential direction and blocks protruding one and block between two, is favorable to improving the magnetic stripe and installs the stability in the installation opening, and the quick installation of the magnetic stripe of being convenient for improves the installation effectiveness.

According to an embodiment of the utility model, a third blocking protrusion and a fourth blocking protrusion are arranged on a side wall of the installation through hole far away from the through hole at intervals, the third blocking protrusion and the fourth blocking protrusion are respectively arranged close to the magnetic isolating structures at two ends of the installation through hole, and when the magnetic strip is installed in the installation through hole, the magnetic strip is limited between the third blocking protrusion and the fourth blocking protrusion in the circumferential direction.

The installation opening in this embodiment is kept away from the interval is equipped with on the lateral wall of through-hole and blocks protruding three and block protruding four, is convenient for inject the magnetic stripe in the circumferential direction and blocks protruding three and block between protruding four, further improves the stability of magnetic stripe installation in the installation opening, the quick installation of the magnetic stripe of being convenient for more, simultaneously also further improvement installation effectiveness. Further, the magnetic stripe in this embodiment can be spacing through blockking protruding one, blocking protruding two, blocking protruding three and blocking protruding four for the magnetic stripe is more stable installs in the installation opening.

In addition, the present embodiment provides an iron core including:

foretell rotor core structure, rotor core structure is equipped with a plurality ofly, and is a plurality of rotor core structure is folded in proper order and is riveted the setting, and is a plurality of rotor core structure's last through-hole aligns to constitute the shaft hole that is used for installing the axis of rotation, and is a plurality of rotor core structure's structural recess aligns to constitute respectively and is used for weakening the torque ripple weakening groove of torque ripple, and is a plurality of rotor core structure's structural installation opening aligns to constitute respectively and is used for installing the logical groove of installation of magnetic stripe is worked as install in the logical inslot of installation the magnetic stripe, the magnetic stripe is at the both ends of circumference direction and is close to the magnetic stripe separate and have the torque ripple weakening cavity that the clearance formed to be used for weakening the torque ripple between the magnetism structure respectively.

The iron core in the embodiment comprises the rotor iron core structure, and the plurality of grooves are arranged on the outer circumferential side of the iron core body of the rotor iron core structure at intervals, so that when the rotor formed by the iron core body is matched with the stator for use, the rotor and the stator rotate relatively, the cogging torque can be reduced by the grooves, and the torque pulsation is weakened, so that the consistency of the torque pulsation frequency of the motor containing the iron core in the embodiment and the mechanical resonance frequency of the motor is reduced during variable-speed driving, the vibration and the noise are reduced, and the stability of the motor containing the iron core in the embodiment in low-speed operation is improved; in addition, a magnetic isolation structure is arranged between the magnetic strips, and magnetic flux reaches saturation through the magnetic isolation structure, so that magnetic flux leakage is limited. Furthermore, the iron core is formed by sequentially laminating and riveting a plurality of rotor iron core structures, so that the iron core is convenient to process.

In addition, the present embodiment provides a rotor assembly, including:

in the iron core, the plurality of magnetic strips include a plurality of N-pole magnetic strips and a plurality of S-pole magnetic strips, and the plurality of N-pole magnetic strips and the plurality of S-pole magnetic strips are sequentially and circumferentially alternately installed in the installation through groove at intervals.

Many in this embodiment N utmost point magnetic stripe and many S utmost point magnetic stripe is in proper order circumference interval and install in turn the inslot is led to in the installation, is convenient for the rotor subassembly to rotate under the effect of the magnetic field that produces after stator module circular telegram, and improves the rotatory reliability of rotor subassembly.

According to one embodiment of the utility model, the cross sections of the N-pole magnetic strip and the S-pole magnetic strip in the width direction are both in a waist trapezoid structure. The cross-section of the magnetic stripe of N utmost point and the magnetic stripe width direction of S utmost point in this embodiment all is waist trapezium structure, leads to groove looks adaptation with the installation, is convenient for install at the installation and leads to the inslot, is favorable to more stable the installing in the installation opening of magnetic stripe, and can improve the installation effectiveness.

According to an embodiment of the utility model, the rotor assembly further comprises:

the two blocking covers are respectively arranged at two ends of the iron core and limit the iron core, and through holes are respectively formed in the centers of the blocking covers and are respectively superposed with the shaft holes;

the iron core is sleeved on the outer side of the rotating shaft, the central axis of the rotating shaft coincides with the central line of the iron core, and two ends of the rotating shaft penetrate through the blocking cover respectively and extend outwards respectively to form a power output end and an installation supporting end.

The lid that blocks in this embodiment does not set up the both ends of unshakable in one ' S determination and right the unshakable in one ' S determination carries on spacingly, ensures to fold the stable in structure who rivets the unshakable in one ' S determination by a plurality of rotor core structures in proper order, and blocks that the lid can block spacingly to installing the N utmost point magnetic stripe and the S utmost point magnetic stripe of logical inslot for N utmost point magnetic stripe and S utmost point magnetic stripe are injectd in the logical inslot of installation, and then are favorable to improving the stability of rotor subassembly.

According to an embodiment of the utility model, the rotor assembly further comprises:

the bearing I is arranged on the outer side of the power output end;

the second bearing is arranged on the outer side of the mounting and supporting end;

and the heat dissipation assembly is installed on the outer side of the power output end and is positioned between the first bearing and the blocking cover close to the first bearing.

In the embodiment, the first bearing and the second bearing are arranged on the power output end and the mounting and supporting end of the rotating shaft, and can rotatably support the rotating shaft, so that the rotating stability of the rotating shaft can be improved; furthermore, a heat dissipation assembly is installed on the outer side of the power output end of the rotating shaft, so that the rotor assembly can dissipate heat when the rotor assembly rotates.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a rotor core structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an iron core according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the installation through slot in the iron core in FIG. 2 with a magnetic strip installed;

FIG. 4 is a schematic view of the core of FIG. 3 with a portion of the rotor core structure removed;

FIG. 5 is a schematic view of a rotor assembly according to an embodiment of the present invention;

FIG. 6 is a front view of the rotor assembly of FIG. 5 after being straightened;

fig. 7 is a top view of the rotor assembly of fig. 6.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the magnetic-isolation-type magnetic core comprises a core body, 2, a core, 3, a magnetic stripe, 4, a rotor assembly, 10, a groove, 11, a through hole, 12, an installation through hole, 13, a torque pulsation weakening hole, 14, a magnetic-isolation structure, 20, a shaft hole, 21, a torque pulsation weakening groove, 22, an installation through groove, 23, a torque pulsation weakening cavity, 40, a blocking cover, 41, a rotating shaft, 42, a first bearing, 43, a second bearing, 44, a heat dissipation assembly, 121, a first blocking bulge, 122, a second blocking bulge, 123, a third blocking bulge, 124, a fourth blocking bulge, 421, a first clamping spring, 431, a second clamping spring, 441 and fan blades.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The present embodiment provides a rotor core structure, as shown in fig. 1, including: the iron core body 1 is of a circular sheet structure, a plurality of grooves 10 for weakening torque pulsation are formed in the circumferential outer side of the iron core body 1 at intervals, the grooves 10 are inwards recessed along the radial direction of the iron core body 1, the grooves 10 extend along the thickness direction of the iron core body 1, and a through hole 11 is formed in the center of the iron core body 1;

still the circumference interval is equipped with a plurality of installation openings 12 that are used for installing magnetic stripe 3 on the iron core body 1, and a plurality of installation openings 12 are located the periphery of through-hole 11, forms between two adjacent installation openings 12 and is used for carrying out the magnetism isolating structure 14 that separates the magnetism to installing the magnetic stripe 3 in adjacent installation opening 12 respectively. Further, the rotor core structure in this embodiment is made of silicon steel.

In this embodiment, as shown in fig. 1, a plurality of grooves 10 are provided at intervals on the outer circumferential side of the core body 1, when the rotor formed by the core body 1 is used in cooperation with the stator, the rotor and the stator rotate relatively, and the grooves 10 can reduce cogging torque, thereby weakening torque ripple, reducing the consistency between the torque ripple frequency and the mechanical resonance frequency of the motor when the motor including the rotor core structure in this embodiment is driven at variable speed, reducing vibration and noise, and improving the stability of the motor of the rotor core structure in this embodiment when the motor is operated at low speed; in addition, the magnetic isolation structures 14 are arranged between the magnetic stripes 3 in the embodiment, and magnetic flux is saturated through the magnetic isolation structures 14, so that the magnetic flux leakage is limited.

In this embodiment, the groove 10 is in an arc shape, eight grooves 10 are provided, eight grooves 10 are equidistantly arranged at intervals, four mounting through holes 12 are provided, four mounting through holes 12 are equidistantly arranged at intervals, four mounting through holes 12 form four magnetism isolating structures 14, and the magnetism isolating structures 14 are in a plate-shaped structure, wherein four grooves 10 of the eight grooves 10 and the four magnetism isolating structures 14 are located on the same radial line; in addition, the shape of the groove 10 of the present embodiment may be set to other structures, and the groove 10 may also be set to six, ten, and so on. Further, the core body 1 of the present embodiment has a circular through hole 11 formed at the center thereof.

According to one embodiment of the present invention, as shown in fig. 1, the installation through opening 12 is in an isosceles trapezoid structure, and when the magnetic stripe 3 is installed in the installation through opening 12, gaps are respectively formed between two ends of the magnetic stripe 3 in the circumferential direction and the magnetic shielding structure 14 close to the magnetic stripe 3 to form torque ripple attenuation openings 13 for attenuating torque ripple.

In this embodiment, as shown in fig. 1, the mounting through opening 12 is in an isosceles trapezoid structure, which facilitates reliable mounting of the magnetic stripe 3; in addition, the magnetic isolation structures 14 in the present embodiment have a gap between them to form a torque ripple attenuation port 13 for attenuating torque ripple, and further reduce cogging torque, thereby improving the torque ripple attenuation effect, reducing the consistency between the torque ripple frequency and the mechanical resonance frequency of the motor during variable speed driving of the motor including the rotor core structure in the present embodiment, reducing vibration and noise, and improving the stability of the motor including the rotor core structure in the present embodiment during low speed operation.

In one embodiment of the present invention, as shown in fig. 1, the opening size of the mounting through-hole 12 on the side close to the through-hole 11 is smaller than the opening size on the side away from the through-hole 11. The opening size is great on one side of installation opening 12 in this embodiment, and the opening size of opposite side is less, and iron core body 1 is circular sheet structure, is convenient for increase the area of seting up the installation opening 12 of formation at iron core body 1, is favorable to the great magnetic stripe 3 of installation size, and the diameter size of iron core body 1 that can abundant utilization is circular sheet structure.

In an embodiment of the present invention, as shown in fig. 1, a first blocking protrusion 121 and a second blocking protrusion 122 are spaced apart from one side wall of the installation through hole 12, which is close to the through hole 11, the first blocking protrusion 121 and the second blocking protrusion 122 are respectively disposed close to the magnetic shielding structure 14 at two ends of the installation through hole 12, and when the magnetic stripe 3 is installed in the installation through hole 12, the magnetic stripe 3 is defined between the first blocking protrusion 121 and the second blocking protrusion 122 in the circumferential direction.

In this embodiment, as shown in fig. 1, installation opening 12 is equipped with on being close to a lateral wall of through-hole 11 the interval and blocks protruding one 121 and block protruding two 122, is convenient for inject magnetic stripe 3 in the circumferential direction and blocks protruding one 121 and block protruding between two 122, is favorable to improving the stability that magnetic stripe 3 installed in installation opening 12, and the quick installation of the magnetic stripe 3 of being convenient for improves the installation effectiveness. Further, in this embodiment, the first blocking protrusion 121 and the second blocking protrusion 122 have the same structure, the first blocking protrusion 121 and the second blocking protrusion 122 both have arc-shaped structures, and the first blocking protrusion 121 and the second blocking protrusion 122 can also be set to other structures, so that the magnetic stripe 3 can be conveniently limited.

In one embodiment of the present invention, as shown in fig. 1, a blocking protrusion three 123 and a blocking protrusion four 124 are spaced apart from one side wall of the installation through opening 12 away from the through hole 11, the blocking protrusion three 123 and the blocking protrusion four 124 are respectively disposed near the magnetic shielding structure 14 at two ends of the installation through opening 12, and when the magnetic stripe 3 is installed in the installation through opening 12, the magnetic stripe 3 is defined between the blocking protrusion three 123 and the blocking protrusion four 124 in the circumferential direction.

In this embodiment, as shown in fig. 2 to 4, installation opening 12 is equipped with the interval on the lateral wall of keeping away from through-hole 11 and blocks protruding three 123 and block protruding four 124, is convenient for inject magnetic stripe 3 in the circumferential direction and blocks protruding three 123 and block protruding four 124 between, further improves the stability that magnetic stripe 3 installed in installation opening 12, the quick installation of magnetic stripe 3 of being convenient for more, simultaneously also further improvement installation effectiveness. Further, magnetic stripe 3 in this embodiment can carry on spacingly through blocking protruding one 121, blocking protruding two 122, blocking protruding three 123 and blocking protruding four 124 for magnetic stripe 3 is more stable installs in installation opening 12. Further, in this embodiment, the structure of the blocking protrusion three 123 is the same as that of the blocking protrusion four 124, the blocking protrusion one 121 and the blocking protrusion two 122 are both arc-shaped structures, and the blocking protrusion three 123 and the blocking protrusion four 124 may also be set to other structures, so that it is convenient to define the magnetic stripe 3.

In addition, as shown in fig. 2 to 4, an iron core provided in the present embodiment includes:

foretell rotor core structure, rotor core structure is equipped with a plurality ofly, a plurality of rotor core structures are overlapped in proper order and are riveted the setting, the through-hole 11 that a plurality of rotor core structures are gone up aligns and constitute shaft hole 20 that is used for installing axis of rotation 41, the recess 10 that a plurality of rotor core structures are gone up aligns and constitutes the torque ripple that is used for weakening torque ripple weakens groove 21 respectively, the structural installation opening 12 of a plurality of rotor core aligns and constitutes the installation logical groove 22 that is used for installing magnetic stripe 3 respectively, install magnetic stripe 3 in the logical groove 22 of installation, magnetic stripe 3 has the clearance respectively to form the torque ripple that is used for weakening torque ripple between the both ends of circumferential direction and the magnetism structure 14 that separates that is close to magnetic stripe 3 and weakens.

In the present embodiment, as shown in fig. 2 to 4, the core 2 includes the above-mentioned rotor core structure, since the plurality of grooves 10 are provided at intervals on the outer circumferential side of the core body 1 of the rotor core structure, when the rotor formed by the core body 1 is used in cooperation with the stator, the rotor and the stator rotate relatively, the grooves 10 can reduce the cogging torque, thereby weakening the torque ripple, reducing the consistency between the torque ripple frequency of the motor including the core 2 in the present embodiment and the mechanical resonance frequency of the motor during the variable speed driving, reducing the vibration and noise, and improving the stability of the core 2 in the present embodiment when the motor is operated at a low speed; in addition, the magnetic isolation structures 14 are arranged between the magnetic stripes 3 in the embodiment, and magnetic flux is saturated through the magnetic isolation structures 14, so that the magnetic flux leakage is limited. Further, the iron core 2 is formed by sequentially laminating and riveting a plurality of rotor core structures, so that the iron core 2 is convenient to process and produce.

In the present embodiment, as shown in fig. 2 to 4, eight grooves 10 on the plurality of rotor core structures are aligned to respectively form four torque ripple attenuation grooves 21 for attenuating torque ripple, four mounting through holes 12 on the plurality of rotor core structures are aligned to respectively form four mounting through grooves 22 for mounting the magnetic strips 3, and when the four mounting through grooves 22 are respectively mounted with the magnetic strips 3, the magnetic strips 3 respectively have gaps between two ends of the circumferential direction and the magnetic shielding structures 14 close to the magnetic strips 3 to form four torque ripple attenuation cavities 23 for attenuating torque ripple. In addition, the number of the torque pulsation reducing grooves 21, the mounting through grooves 22, and the torque pulsation reducing cavities 23 may be adjusted by adjusting the structure of the rotor core as needed.

In addition, as shown in fig. 5 to 7, the rotor assembly provided in this embodiment includes:

in the iron core 2, the plurality of magnetic strips 3 include a plurality of N-pole magnetic strips and a plurality of S-pole magnetic strips, and the plurality of N-pole magnetic strips and the plurality of S-pole magnetic strips are sequentially and circumferentially alternately installed in the installation through groove 22 at intervals.

In this embodiment, as shown in fig. 5 to 7, the plurality of N-pole magnetic strips and the plurality of S-pole magnetic strips are sequentially and circumferentially spaced and alternately installed in the installation through groove 22, so that the rotor assembly 4 rotates under the action of the magnetic field generated after the stator assembly is powered on, and the reliability of the rotation of the rotor assembly 4 is improved. Further, the magnetic stripe 3 of this implementation includes two N utmost point magnetic stripes and two S utmost point magnetic stripes, and the quantity that N utmost point magnetic stripe and S utmost point magnetic stripe set up can also adjust the rotor core structure as required and adjust.

In an embodiment of the present invention, as shown in fig. 5 to 7, the cross sections of the N-pole magnetic stripe and the S-pole magnetic stripe in the width direction are both in a waist trapezoid structure. The cross-section of the magnetic stripe of N utmost point and the magnetic stripe width direction of S utmost point in this embodiment all is waist trapezium structure, and leads to groove 22 looks adaptation with the installation, is convenient for install in the logical groove 22 of installation, is favorable to installing in installation opening 12 that magnetic stripe 3 is more stable, and can improve the installation effectiveness.

In one embodiment of the present invention, as shown in fig. 5 to 7, the rotor assembly 4 further includes:

two blocking covers 40 are arranged, the two blocking covers 40 are respectively arranged at two ends of the iron core 2 and limit the iron core 2, through holes are respectively arranged at the center of each blocking cover 40, and the through holes are respectively superposed with the shaft holes 20;

the iron core 2 is sleeved outside the rotating shaft 41, the central axis of the rotating shaft 41 coincides with the central axis of the iron core 2, and two ends of the rotating shaft 41 respectively penetrate through the blocking cover 40 and respectively extend outwards to form a power output end and an installation supporting end.

In this embodiment, as shown in fig. 5 to 7, the blocking cover 40 is respectively disposed at two ends of the iron core 2 and limits the iron core 2, so as to ensure the structural stability of the iron core 2 formed by sequentially overlapping and riveting a plurality of rotor core structures, and the blocking cover 40 can block the N-pole magnetic stripe and the S-pole magnetic stripe installed in the installation through slot 22 to limit the N-pole magnetic stripe and the S-pole magnetic stripe, so that the N-pole magnetic stripe and the S-pole magnetic stripe are limited in the installation through slot 22, and further, the stability of the rotor assembly 4 is improved.

According to one embodiment of the utility model, the rotor assembly 4 further comprises:

the bearing I42 is arranged on the outer side of the power output end;

the second bearing 43 is arranged on the outer side of the mounting and supporting end;

and the heat dissipation assembly 44 is arranged on the outer side of the power output end and is positioned between the bearing I42 and the blocking cover 40 close to the bearing I42.

In this embodiment, as shown in fig. 5 to 7, the first bearing 42 and the second bearing 43 are disposed on the power output end and the mounting support end of the rotating shaft 41, and the first bearing 42 and the second bearing 43 can rotatably support the rotating shaft 41, so as to improve the stability of the rotation of the rotating shaft 41; further, a heat dissipating unit 44 is installed at an outer side of the power output end of the rotating shaft 41 to facilitate heat dissipation of the rotor assembly 4 when the rotor assembly 4 rotates.

In the embodiment, as shown in fig. 5 to 7, the end of the power output end is provided with threads, which is beneficial for connecting with other components and outputting power; in addition, a first snap spring 421 and a second snap spring 431 are arranged on the rotating shaft 41 in this embodiment, the first snap spring 421 is located at one end of the first bearing 42 close to the heat dissipation assembly 44, the first snap spring 421 is used for limiting the first bearing 42, the second snap spring 431 is located at one end of the second bearing 43 close to the blocking cover 40, and the second snap spring 431 is used for limiting the second bearing 43; further, a plurality of blades 441 with an arc-shaped structure are axially spaced on the outer side wall of the heat dissipation assembly 44 in this embodiment.

Besides the technical solutions disclosed in the embodiments, reference may be made to conventional technical solutions in the technical field for working principles of other structures of the first bearing, the second bearing and the heat dissipation assembly in the present invention, and these conventional technical solutions are not the main point of the present invention, and the present invention is not set forth herein in detail.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A rotor core structure, comprising:

the iron core body is of a circular sheet structure, a plurality of grooves for weakening torque pulsation are arranged on the outer circumferential side of the iron core body at intervals, the grooves are inwards recessed along the radial direction of the iron core body, the grooves extend along the thickness direction of the iron core body, and a through hole is formed in the center of the iron core body;

it is equipped with a plurality of installation openings that are used for installing the magnetic stripe, and a plurality of to go back the circumference interval on the iron core body the installation opening is located the periphery of through-hole, adjacent two form between the installation opening and be used for respectively installing adjacent the magnetic isolation structure that magnetic isolation was carried out to magnetic stripe in the installation opening.

2. The rotor core structure of claim 1, wherein the mounting opening is an isosceles trapezoid structure, and when the magnetic stripe is mounted in the mounting opening, gaps are respectively formed between two ends of the magnetic stripe in the circumferential direction and the magnetic isolation structure close to the magnetic stripe to form a torque ripple weakening opening for weakening torque ripple.

3. The rotor core structure of claim 2 wherein the mounting through opening has a smaller opening size on a side near the through hole than on a side remote from the through hole.

4. The rotor core structure of claim 2, wherein a first blocking protrusion and a second blocking protrusion are spaced apart from each other on a side wall of the installation opening close to the through hole, the first blocking protrusion and the second blocking protrusion are respectively disposed close to the magnetic isolation structures at two ends of the installation opening, and when the magnetic stripe is installed in the installation opening, the magnetic stripe is defined between the first blocking protrusion and the second blocking protrusion in the circumferential direction.

5. The rotor core structure according to claim 4, wherein a third blocking protrusion and a fourth blocking protrusion are spaced apart from one side wall of the installation opening, which is far away from the through hole, and the third blocking protrusion and the fourth blocking protrusion are respectively disposed near the magnetic isolation structures at two ends of the installation opening, and when the magnetic stripe is installed in the installation opening, the magnetic stripe is defined between the third blocking protrusion and the fourth blocking protrusion in the circumferential direction.

6. A core, comprising:

the rotor core structure of any one of claims 1 to 5, wherein a plurality of rotor core structures are provided, a plurality of rotor core structures are sequentially stacked and riveted, a plurality of through holes on the rotor core structures are aligned to form a shaft hole for installing a rotating shaft, a plurality of grooves on the rotor core structures are aligned to form a torque ripple weakening groove for weakening torque ripple, a plurality of installation through holes on the rotor core structures are aligned to form an installation through groove for installing the magnetic stripe, when the magnetic stripe is installed in the installation through groove, gaps are respectively formed between two ends of the magnetic stripe in the circumferential direction and the magnetic isolation structures close to the magnetic stripe to form a torque ripple weakening cavity for weakening torque ripple.

7. A rotor assembly, comprising:

the core as claimed in claim 6, wherein the plurality of magnetic strips includes a plurality of N-pole magnetic strips and a plurality of S-pole magnetic strips, and the plurality of N-pole magnetic strips and the plurality of S-pole magnetic strips are alternately mounted in the mounting slot at circumferentially spaced intervals in sequence.

8. The rotor assembly of claim 7 wherein the N pole magnetic strip and the S pole magnetic strip are each of a waist trapezoid structure in cross section in the width direction.

9. The rotor assembly of claim 7, further comprising:

the two blocking covers are respectively arranged at two ends of the iron core and limit the iron core, and through holes are respectively formed in the centers of the blocking covers and are respectively superposed with the shaft holes;

the iron core is sleeved on the outer side of the rotating shaft, the central axis of the rotating shaft coincides with the central line of the iron core, and two ends of the rotating shaft penetrate through the blocking cover respectively and extend outwards respectively to form a power output end and an installation supporting end.

10. The rotor assembly of claim 9, further comprising:

the bearing I is arranged on the outer side of the power output end;

the second bearing is installed on the outer side of the installation supporting end;

and the heat dissipation assembly is installed on the outer side of the power output end and is positioned between the first bearing and the blocking cover close to the first bearing.

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