CN220122664U

CN220122664U - Motor rotor structure

Info

Publication number: CN220122664U
Application number: CN202321276712.7U
Authority: CN
Inventors: 曹建文; 周达; 曹佳伟; 陈轲
Original assignee: Suzhou Chiyou Equipment Technology Co ltd
Current assignee: Suzhou Chiyou Equipment Technology Co ltd
Priority date: 2023-05-25
Filing date: 2023-05-25
Publication date: 2023-12-01
Anticipated expiration: 2033-05-25

Abstract

The utility model is suitable for the technical field of motor rotors, and provides a motor rotor structure, which comprises an aluminum pressing plate assembly, wherein the aluminum pressing plate assembly is symmetrically arranged into two groups, a rotor punching sheet assembly and a rotor core assembly are internally installed; a group of fan blades are arranged between every two groups of balance columns, and a plurality of groups of fan blades are arranged in a surrounding manner perpendicular to the plane of the aluminum pressing plate body. The device has solved the motor rotor and has made mistakes the back and have become the whole and void, consume great, the inside high temperature problem that produces in the use, has reached can not cause the motor rotor whole to scrap, improves material utilization, reduces the effect of inside temperature.

Description

Motor rotor structure

Technical Field

The utility model relates to the technical field of motor rotors, in particular to a motor rotor structure.

Background

The permanent magnet synchronous motor uses the permanent magnet to provide excitation, so that the motor structure is simpler, the processing and assembly cost is reduced, a collecting ring and an electric brush which are easy to cause problems are omitted, and the operation reliability of the motor is improved; and because exciting current is not needed, no exciting loss is generated, the efficiency and the power density of the motor are improved

The existing built-in permanent magnet synchronous motor is characterized in that a rotor punching sheet is manufactured by adopting a process of punching a magnetic steel groove by using a full circle blanking, and the rotor punching sheet manufactured by the process has high requirements on the manufacturing process although the integrity is good, and is entirely wasted after errors occur, so that the loss is high. And the rotating speed of the motor rotor is higher in the actual working process, and higher temperature can be generated inside the motor rotor.

Therefore, the assembled motor rotor is required, on one hand, the requirement on the manufacturing process is reduced, and on the other hand, the rotor punching sheet is prevented from being scrapped as a whole even if the rotor punching sheet splicing unit is manufactured in error.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a motor rotor structure which can splice rotor punching sheets and reduce the internal temperature of a motor rotor.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the motor rotor structure comprises an aluminum pressing plate assembly, wherein the aluminum pressing plate assembly is symmetrically arranged into two groups, a rotor punching sheet assembly and a rotor core assembly are arranged in the aluminum pressing plate assembly, the aluminum pressing plate assembly comprises,

the aluminum pressing plate body is arranged into a circular shape, the size of an inner through hole is consistent with the size of the outer side of the rotor core assembly, a plurality of groups of balance columns are circumferentially arranged on one side, far away from the rotor core assembly, of the aluminum pressing plate body along the outer circle, and a plurality of groups of vent holes are circumferentially arranged on one side, close to the rotor core assembly, of the aluminum pressing plate body along the inner circle;

a group of fan blades are arranged between every two groups of balance columns, and a plurality of groups of fan blades are arranged in a surrounding manner perpendicular to the plane of the aluminum pressing plate body.

The utility model is further provided with: the balance column is cylindrical and is perpendicular to the plane of the aluminum pressing plate body, and the vent hole is arranged in a semicircular arc shape;

two groups of first key notch are symmetrically arranged on the outer side of the through hole of the aluminum pressing plate body, and the first key notch is matched with the rotor core assembly for meshing.

The utility model is further provided with: the rotor punching sheet component is arranged in a circular ring shape, the size of the inner through hole is consistent with that of the inner through hole of the aluminum pressing plate body, the rotor punching sheet component comprises,

the rotor punching sheet is arranged in an arc shape, four groups of rotor punching sheets are spliced and combined to form a rotor punching sheet assembly, one end of the rotor punching sheet is provided with a dovetail groove, the other end of the rotor punching sheet is provided with a boss, the rotor punching sheet is provided with a plurality of groups of rotor through holes along the inner circle in a surrounding manner, and a plurality of groups of magnetic steel grooves along the outer circle in a surrounding manner;

the positions and the sizes of the dovetail grooves and the bosses are matched, so that four groups of rotor punching sheets can be spliced and assembled into a complete ring shape in sequence; and a group of second key notches are respectively arranged on one sides of the dovetail grooves and the bosses, which are close to the inner circle, and a 90-degree included angle is formed between the axes of the second key notches after the four groups of rotor punching sheets are spliced, the size of the included angle is consistent with that of the first key notches, and the two groups of second key notches can be matched with the rotor core assembly for meshing.

The utility model is further provided with: the rotor through holes are circular and penetrate through the rotor punching sheet, the rotor through holes correspond to the positions of the vent holes one by one, the magnetic steel grooves are obliquely arranged and symmetrically arranged about the axis of the rotor through holes, and a group of self-riveting rivets are arranged between every two groups of magnetic steel grooves;

and the self-riveting rivets stack a plurality of groups of rotor punching sheet assemblies into blocks.

The utility model is further provided with: the rotor core assembly includes a plurality of rotor cores,

the iron core body is cylindrical, the outer circle size of the iron core body is consistent with the sizes of the rotor punching sheet assembly and the inner through holes of the aluminum pressing plate body, and four groups of key grooves are symmetrically formed in the outer side of the iron core body;

the key groove is arranged along the through length of the iron core body, the opening size is consistent with that of the first key groove opening and the second key groove opening after splicing, and the key groove can be meshed with the first key groove opening and the second key groove opening after splicing respectively and the rotor iron core component can be inserted into the rotor punching component and the aluminum pressing plate body respectively.

The utility model is further provided with: an iron core through hole is formed in the iron core body, and the top of the iron core body is connected with a limit ring;

the limiting ring is fixedly connected with the top of the iron core body, and the diameter of the limiting ring is slightly larger than that of the iron core body; the iron core through hole is arranged as a circular hole and penetrates through the iron core body and the limit ring.

The utility model has the advantages that:

1. the dovetail grooves are formed in one end of the rotor punching sheet, the bosses are arranged at the other end of the rotor punching sheet, and the positions and the sizes of the dovetail grooves and the bosses are matched, so that the four groups of rotor punching sheets can be spliced and assembled into a complete circular ring shape in sequence, and meanwhile, the tight and reliable connection between the rotor punching sheets can be ensured. The four groups of rotor punching sheets are spliced and combined to form the rotor punching sheet assembly, so that the rotor punching sheet assembly is not scrapped as a whole after an error occurs, and the material utilization rate is improved.

2. The key groove can be meshed with the first key groove opening and the spliced second key groove opening respectively, so that on one hand, the connection of the aluminum pressing plate assembly, the rotor punching assembly and the rotor iron core assembly is tightly and reliably ensured; on the other hand, the key groove limits the spliced second key groove openings, and an included angle of 90 degrees is formed between the axes of the two groups of second key groove openings, so that the rotor punching sheets are more reliably connected, the rotor punching sheets cannot deviate from each other, and the reliability of the integral connection of the rotor punching sheet assemblies is further ensured.

3. After the rotor punching sheet component is connected with the iron core component, the rotor through holes correspond to the mounting holes one by one, and a channel can be formed in the motor rotor when the motor rotor works. The centrifugal motion of the motor rotor generates air flow, and the air flow passes through a channel inside the motor rotor, so that the aim of reducing the temperature inside the motor rotor is fulfilled.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic structural view of an aluminum platen assembly;

FIG. 3 is a schematic structural view of a rotor lamination assembly;

fig. 4 is a schematic structural view of a rotor core assembly;

FIG. 5 is a schematic diagram of an exploded construction of the present utility model;

in the figure: 1. an aluminum platen assembly; 11. an aluminum platen body; 12. a balance column; 13. a fan blade; 14. a vent hole; 15. a first key slot; 2. a rotor punching assembly; 21. rotor punching; 22. a dovetail groove; 23. a boss; 24. a rotor through hole; 25. a magnetic steel groove; 26. self-riveting rivets; 27. a second key slot; 3. a rotor core assembly; 31. an iron core body; 32. a limit ring; 33. an iron core through hole; 34. a keyway.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, the terms "upper" and "lower" are used generally with respect to the directions shown in the drawings, or with respect to the vertical, vertical or gravitational directions; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

Example 1

Referring to fig. 1-5, the present utility model provides the following technical solutions:

specifically, the motor rotor structure comprises an aluminum pressing plate assembly 1, a rotor punching sheet assembly 2 and a rotor core assembly 3. The aluminum pressing plate assembly 1 is symmetrically arranged into two groups, the rotor punching assembly 2 and the rotor core assembly 3 are internally installed, and the aluminum pressing plate assembly 1 comprises an aluminum pressing plate body 11, a balance column 12, fan blades 13, ventilation holes 14 and first key notches 15. The aluminum pressing plate body 11 is arranged into a circular ring shape, the size of an inner through hole is consistent with that of the outer side of the rotor core assembly 3, a long bolt can be embedded into the through hole of the aluminum pressing plate body 11 to be firmly connected with the motor, and meanwhile, magnetic steel arranged in a motor rotor can be pressed and fixed, so that an excellent compaction and fixation effect is achieved, and meanwhile, the rotor core assembly 3 can be inserted into the rotor core assembly.

The aluminum pressing plate body 11 is far away from one side of the rotor core assembly 3, a plurality of groups of balance columns 12 are arranged along the outer circle, the balance columns 12 are arranged to be cylindrical and perpendicular to the plane of the aluminum pressing plate body 11, and the balance columns 12 can play a role in balancing by placing iron gasket counterweights when the motor rotor is in dynamic balance. A group of fan blades 13 are arranged between the two groups of balance columns 12, the fan blades 13 are arranged in a surrounding manner perpendicular to the plane of the aluminum pressing plate body 11, and the fan blades 13 can play a role of a fan when the motor rotates to radiate heat of the motor rotor.

The aluminum pressing plate body 11 is provided with a plurality of groups of vent holes 14 along the inner circle near one side of the rotor core assembly 3, and the vent holes 14 are arranged in a semicircular arc shape. Two groups of first key notch 15 are symmetrically arranged outside the through hole of the aluminum pressing plate body 11, and the first key notch 15 is matched with the rotor core assembly 3 to be meshed, so that the purpose of installing the core assembly 3 inside the aluminum pressing plate assembly 1 is achieved.

The rotor punching assembly 2 is in a ring shape, and the size of the inner through hole is consistent with that of the inner through hole of the aluminum pressing plate body 11, so that the rotor core assembly 3 can be inserted into the inner through hole. The rotor punching assembly 2 includes a rotor punching 21, a dovetail groove 22, a boss 23, a rotor through hole 24, a magnetic steel groove 25, a self-riveting rivet 26, and a second key slot 27. The rotor punching sheets 21 are arranged in a circular arc shape, and four groups of rotor punching sheets 21 are spliced and combined to form the rotor punching sheet assembly 2. One end of the rotor punching sheet 21 is provided with a dovetail groove 22, the other end of the rotor punching sheet is provided with a boss 23, and the positions and the sizes of the dovetail groove 22 and the boss 23 are matched, so that the four groups of rotor punching sheets 21 can be spliced and assembled into a complete circular ring shape in sequence, and the rotor punching sheet assembly 2 is formed by splicing the rotor punching sheets 21.

The rotor punching sheet 21 is provided with a plurality of groups of rotor through holes 24 along the inner circle, a plurality of groups of magnetic steel grooves 25 along the outer circle, the rotor through holes 24 are circular and penetrate through the rotor punching sheet 21, the rotor through holes 24 correspond to the mounting holes 14 one by one, and a channel can be formed inside the motor rotor when the motor rotor works. The centrifugal motion of the motor rotor generates air flow, and the air flow passes through a channel inside the motor rotor, so that the aim of reducing the temperature inside the motor rotor is fulfilled. The magnetic steel grooves 25 are obliquely arranged and symmetrically arranged about the axis of the rotor through holes 24, and magnetic steel can be inserted into the magnetic steel grooves 25.

A group of self-riveting rivets 26 are arranged between every two groups of magnetic steel grooves 25, and a plurality of groups of rotor punching sheet assemblies 2 are stacked into blocks through the self-riveting rivets 26, so that the connection reliability of the motor rotor is ensured. A group of second key notches 27 are respectively arranged on one side, close to the inner circle, of the dovetail groove 22 and the boss 23, an included angle of 90 degrees is formed between the axes of the two groups of second key notches 27 formed after the four groups of rotor punching sheets 21 are spliced, the size of the included angle is consistent with that of the first key notch 15, and the two groups of second key notches 27 can be matched and meshed with the rotor core assembly 3. The second key notch 27 enables the rotor core assembly 3 to be inserted into the rotor sheet assembly 2 to fix the rotor sheet assembly 2.

The rotor core assembly 3 includes a core body 31, a retainer 32, a core through hole 33, and a key groove 34. The iron core body 31 is set to be cylindrical, and the excircle size is consistent with the size of the rotor punching assembly 2 and the inner through hole of the aluminum pressing plate body 11, so that the rotor iron core assembly 3 can be inserted into the rotor punching assembly 2 and the aluminum pressing plate body 11 and is tightly attached.

Four groups of key grooves 34 are symmetrically arranged on the outer side of the iron core body 31, the key grooves 34 are arranged along the through length of the iron core body 31, the opening size is consistent with that of the first key groove 15 and the spliced second key groove 27, the key grooves 34 can be meshed with the first key groove 15 and the spliced second key groove 27 respectively, and the reliability of connection is ensured when the rotor iron core assembly 3 is inserted into the rotor punching assembly 2 and the aluminum pressing plate body 11 respectively.

The core body 31 is internally provided with a core through hole 33 and the top is connected with a stop collar 32. The stop collar 32 is fixedly connected with the top of the iron core body 31, and the diameter is slightly larger than that of the iron core body 31, so that the rotor punching assembly 2 can be limited after being inserted into the rotor punching assembly 2, and effective fastening fit between the stop collar and the iron core body is ensured. The core through hole 33 is provided as a circular hole, and penetrates the core body 31 and the stopper 32.

The working principle of the motor rotor structure provided by the utility model is as follows:

one end of the rotor punching sheet 21 is provided with a dovetail groove 22, the other end of the rotor punching sheet is provided with a boss 23, and the positions and the sizes of the dovetail groove 22 and the boss 23 are matched, so that the four groups of rotor punching sheets 21 can be spliced and assembled into a complete circular ring shape in sequence, and meanwhile, the tight and reliable connection between the rotor punching sheets 21 can be ensured. The four groups of rotor punching sheets 21 are spliced and combined to form the rotor punching sheet assembly 2, so that the rotor punching sheet assembly 2 is not scrapped as a whole after the rotor punching sheet 21 goes wrong, and the material utilization rate is improved.

The size of the inner through hole of the rotor punching sheet assembly 2 is consistent with that of the inner through hole of the aluminum pressing plate body 11 and is consistent with the outer side of the rotor core assembly 3, so that the rotor core assembly 3 can be inserted into the inner through hole. After the rotor core component 3 is inserted into the rotor punching component 2, the limiting ring 32 limits the rotor punching component 2, so that effective fastening fit between the rotor core component and the rotor punching component is ensured.

The rotor core component 3 is arranged in the rotor punching component 2, and the rotor core component 3 can be utilized to bear certain strain, so that the rotor punching component 2 on the end face of the motor rotor is prevented from bouncing up and warping in the machining process, and the inner hole of the motor rotor is prevented from being stretched and deformed easily when the aluminum dummy shaft is withdrawn.

After the rotor punching assembly 2 is connected with the iron core assembly 3, the rotor through holes 24 correspond to the mounting holes 14 one by one, and channels can be formed in the rotor punching assembly when the motor rotor works. The centrifugal motion of the motor rotor generates air flow, and the air flow passes through a channel inside the motor rotor, so that the aim of reducing the temperature inside the motor rotor is fulfilled.

Aluminum pressing plate assemblies 1 are arranged at two ends of the rotor core assembly 3. Two groups of first key notches 15 are symmetrically arranged on the outer side of the through hole of the aluminum pressing plate body 11; a group of second key notch 27 is respectively arranged on one side, close to the inner circle, of the dovetail groove 22 and the boss 23 on the rotor punching assembly 2, and an included angle of 90 degrees is formed between the axes of the two groups of second key notch 27 after the four groups of rotor punching 21 are spliced; four groups of key grooves 34 are symmetrically arranged on the outer side of the iron core body 31, and the opening sizes of the key grooves 34 are consistent with those of the first key groove 15 and the spliced second key groove 27.

The key groove 34 can be respectively meshed with the first key notch 15 and the spliced second key notch 27, so that on one hand, the connection tightness and reliability of the aluminum pressing plate assembly 1, the rotor punching assembly 2 and the rotor core assembly 3 are ensured; on the other hand, the key grooves 34 limit the spliced second key groove 27, and the 90-degree included angle is formed between the axes of the two groups of second key groove 27, so that the rotor punching sheets 21 are more reliably connected, the rotor punching sheets cannot deviate from each other, and the reliability of the integral connection of the rotor punching sheet assembly 2 is further ensured.

The aluminum pressing plate body 11 is provided with a plurality of groups of ventilation holes 14 along the inner circle near one side of the rotor core assembly 3, long bolts can be embedded in the ventilation holes 14 to be firmly connected with the motor, and meanwhile, magnetic steel arranged in the motor rotor can be pressed and fixed, so that an excellent compaction and fixation effect is achieved. The aluminum pressing plate body 11 is provided with a plurality of groups of balance columns 12 along the outer circumference on one side far away from the rotor core assembly 3, and the balance columns 12 can play a role in balance by placing iron gasket counterweights when the motor rotor performs dynamic balance. A group of fan blades 13 are arranged between the two groups of balance columns 12, and the fan blades 13 can play a role of a fan when the motor rotates to radiate heat of a motor rotor.

It will be apparent that the embodiments described above are merely 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 present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A motor rotor structure, characterized in that: comprises an aluminum pressing plate assembly (1), wherein the aluminum pressing plate assembly (1) is symmetrically arranged into two groups, a rotor punching sheet assembly (2) and a rotor iron core assembly (3) are arranged in the aluminum pressing plate assembly (1), the aluminum pressing plate assembly (1) comprises,

the aluminum pressing plate body (11), the aluminum pressing plate body (11) is arranged to be annular, the size of an inner through hole is consistent with the outer side of the rotor core assembly (3), a plurality of groups of balance columns (12) are circumferentially arranged on one side, far away from the rotor core assembly (3), of the aluminum pressing plate body (11) along the outer circle, and a plurality of groups of ventilation holes (14) are circumferentially arranged on one side, close to the rotor core assembly (3), of the aluminum pressing plate body (11) along the inner circle;

a group of fan blades (13) is arranged between every two groups of balance columns (12), and a plurality of groups of fan blades (13) are arranged around the plane of the vertical aluminum pressing plate body (11).

2. A motor rotor structure according to claim 1, wherein: the balance column (12) is arranged in a cylindrical shape and is perpendicular to the plane of the aluminum pressing plate body (11), and the ventilation hole (14) is arranged in a semicircular arc shape;

two groups of first key notch (15) are symmetrically arranged on the outer side of the through hole of the aluminum pressing plate body (11), and the first key notch (15) is matched with the rotor core assembly (3) for meshing.

3. A motor rotor structure according to claim 1, wherein: the rotor punching sheet component (2) is arranged in a circular ring shape, the size of the inner through hole is consistent with that of the inner through hole of the aluminum pressing plate body (11), the rotor punching sheet component (2) comprises,

the rotor punching sheet (21), the rotor punching sheet (21) is arranged in an arc shape, four groups of rotor punching sheets (21) are spliced and combined to form a rotor punching sheet assembly (2), one end of the rotor punching sheet (21) is provided with a dovetail groove (22), the other end of the rotor punching sheet is provided with a boss (23), the rotor punching sheet (21) is provided with a plurality of groups of rotor through holes (24) along the inner circle in a surrounding manner, and a plurality of groups of magnetic steel grooves (25) along the outer circle in a surrounding manner;

the positions and the sizes of the dovetail grooves (22) and the bosses (23) are matched, so that the four groups of rotor punching sheets (21) can be spliced and assembled into a complete circular ring shape in sequence; a group of second key notches (27) are respectively formed in one side, close to the inner circle, of each dovetail groove (22) and each boss (23), an included angle of 90 degrees is formed between the axes of the two groups of second key notches (27) formed after the four groups of rotor punching sheets (21) are spliced, the size of each second key notch is consistent with that of each first key notch (15), and the two groups of second key notches (27) can be meshed with the rotor core assembly (3) in a matched mode.

4. A motor rotor structure according to claim 3, wherein: the rotor through holes (24) are arranged in a round shape and penetrate through the rotor punching sheet (21), the rotor through holes (24) correspond to the positions of the vent holes (14) one by one, the magnetic steel grooves (25) are obliquely arranged and symmetrically arranged relative to the axis of the rotor through holes (24), and a group of self-riveting rivets (26) are arranged between every two groups of the magnetic steel grooves (25);

wherein the self-riveting rivet (26) stacks a plurality of groups of rotor punching sheet assemblies (2) into blocks.

5. A motor rotor structure according to claim 3, wherein: the rotor core assembly (3) comprises,

the iron core body (31), the iron core body (31) is cylindrical, the outer circle size is consistent with the size of the inner through holes of the rotor punching sheet assembly (2) and the aluminum pressing plate body (11), and four groups of key grooves (34) are symmetrically arranged on the outer side of the iron core body (31);

the key groove (34) is arranged along the through length of the iron core body (31), the opening size is consistent with that of the first key notch (15) and the spliced second key notch (27), and the key groove (34) can be meshed with the first key notch (15) and the spliced second key notch (27) respectively and the rotor iron core assembly (3) is inserted into the rotor punching assembly (2) and the aluminum pressing plate body (11) respectively.

6. A motor rotor structure according to claim 5, wherein: an iron core through hole (33) is formed in the iron core body (31), and a limit ring (32) is connected to the top of the iron core through hole;

wherein the limit ring (32) is fixedly connected with the top of the iron core body (31); the iron core through hole (33) is a round hole and penetrates through the iron core body (31) and the limit ring (32).