CN112290705A - Motor rotor iron core and motor - Google Patents

Motor rotor iron core and motor Download PDF

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Publication number
CN112290705A
CN112290705A CN202011262929.3A CN202011262929A CN112290705A CN 112290705 A CN112290705 A CN 112290705A CN 202011262929 A CN202011262929 A CN 202011262929A CN 112290705 A CN112290705 A CN 112290705A
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CN
China
Prior art keywords
tooth
main shaft
rotor core
motor rotor
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011262929.3A
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Chinese (zh)
Inventor
马洪涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Jingcheng Motor Co ltd
Original Assignee
Ningbo Jingcheng Motor Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Jingcheng Motor Co ltd filed Critical Ningbo Jingcheng Motor Co ltd
Priority to CN202011262929.3A priority Critical patent/CN112290705A/en
Publication of CN112290705A publication Critical patent/CN112290705A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/26Rotor cores with slots for windings
    • H02K1/265Shape, form or location of the slots

Abstract

The invention provides a motor rotor iron core and a motor; the motor rotor iron core comprises a main shaft and a plurality of rows of tooth blocks; the multiple rows of tooth blocks are uniformly distributed on the circumferential direction of the outer wall of the main shaft; the tooth block is formed by overlapping a plurality of punching sheets; the scheme provided by the invention can effectively improve the utilization rate of the punching sheet material in the motor rotor core, so that the straight slot and the inclined slot are more convenient to position, and the manufacturing cost of the motor rotor core is reduced.

Description

Motor rotor iron core and motor
Technical Field
The invention belongs to the technical field of motor rotor cores, and particularly relates to a motor rotor core and a motor.
Background
At present, the processing technology of the motor iron core mostly adopts a stamping lamination method or a coiling method; the winding method is only suitable for processing narrow-ring iron cores with enlarged curvature radius and shallower slots, and is mainly suitable for inner open slots, such as automobile generator iron cores, but for small-radius iron cores with outer open slots, the winding method cannot be realized by using a common winding processing method; therefore, the general iron core mostly adopts a stamping lamination method, and the basic steps are as follows: firstly, punching the silicon steel sheet by a punch through a die according to the cross section shape of the iron core to obtain a piece of punched sheet, and then laminating the punched sheets together to form the iron core with the thickness required by the drawing; during the punching process, the falling material sheets are formed into useful punching sheets, waste materials are left on the plates, the material utilization rate of the processing method for punching the lamination sheets is generally between 25 and 50 percent according to the cross section shape of the iron core, and different groove shapes, such as a straight groove and an inclined groove, are difficult to position, and an additional pair of dies is required to be opened, so that the process cost is increased.
Based on the technical problems in the processing of the motor iron core, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a rotor core punching sheet for a motor, which aims to solve one of the problems of low material utilization rate of punching sheets, difficult positioning of straight slots and inclined slots, low slot fullness rate and high manufacturing cost in the existing rotor core of the motor.
The invention provides a motor rotor iron core, which comprises a main shaft and a plurality of rows of tooth blocks; the multiple rows of tooth blocks are uniformly distributed on the circumferential direction of the outer wall of the main shaft; the tooth block is formed by stacking a plurality of punching sheets.
Furthermore, a plurality of clamping grooves are formed in the outer wall of the main shaft; the clamping grooves are distributed on the circumferential direction of the outer wall of the main shaft side by side along the axial direction of the main shaft; the multiple punching sheets are clamped in the clamping grooves through clamping blocks at one end parts of the punching sheets and can slide along the clamping grooves, so that the punching sheets are overlapped to form the tooth blocks.
Furthermore, the clamping groove is of a dovetail groove structure, the clamping block is of a dovetail structure, and the dovetail structure is matched with the dovetail groove structure; or the clamping groove is of a trapezoid groove structure, the clamping block is of a trapezoid structure, and the trapezoid structure is matched with the trapezoid structure.
Furthermore, the multiple rows of tooth blocks are distributed on the outer wall of the main shaft along the axial direction of the main shaft; the bottom surface of the clamping groove is an arc surface, the bottom surface of the clamping block is an arc surface, and the circle centers of the clamping groove and the arc surface of the clamping block and the circle center of the main shaft are concentrically arranged.
Furthermore, the punching sheet is of a single-tooth punching sheet structure, the single-tooth punching sheet structure comprises a tooth body and a tooth crown, the fixture block is arranged at the bottom of the tooth body, and the tooth crown is arranged at the top of the tooth body.
Furthermore, the tooth crown extends towards two sides of the tooth body to form a T-shaped structure, and a yoke part is formed at the joint of the tooth crown and the tooth body; a plurality of tooth bodies superpose the tooth body portion that forms the tooth piece, and tooth body portion is used for twining the copper line.
Furthermore, a protrusion is arranged on the upper end face of the tooth crown, a groove is arranged on the lower end face of the tooth crown, and the protrusion is matched with the groove; and adjacent punching sheets are positioned by the bulges and the grooves.
Furthermore, the arrangement positions or structures of the protrusions and the grooves on each punching sheet are different, and the arrangement positions or structures of the protrusions and the grooves on adjacent punching sheets are the same.
Further, the motor rotor core also comprises a motor shaft; a through hole is arranged in the main shaft along the axial direction of the main shaft, and one end of a motor shaft penetrates through the through hole and is fixedly connected with the main shaft.
Correspondingly, the invention also provides a motor, which comprises a motor rotor iron core; the motor rotor iron core is the motor rotor iron core.
The invention provides a motor rotor iron core, which can be freely matched and is formed by splicing a plurality of sizes of main shafts with tooth sockets and a plurality of groups of iron core tooth blocks wound with coils, wherein each row of tooth blocks is formed by mutually overlapping a plurality of independent punching sheet units; the punching sheet has the advantages that the protrusions with different angles are arranged on each single punching sheet, the corresponding grooves are formed in the back of the punching sheet, different protrusions and grooves can be selected to correspond to each other when the punching sheet is laminated, the protrusions are used for positioning the angles of the straight groove, the inclined groove and the inclined groove, the laminating freedom of the punching sheet and the repeated utilization of materials are achieved, the utilization rate of the materials and multiple possibilities of material combination are improved, the positioning difficulty of the straight groove and the inclined groove is effectively improved, the process cost is reduced, and the utilization rate of the materials is increased.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a schematic structural diagram of a rotor core of an electric machine according to the present invention;
FIG. 2 is a side view of a rotor core structure of an electrical machine according to the present invention;
FIG. 3 is a schematic view of a spindle structure of a ten-slot structure according to the present invention;
FIG. 4 is a schematic view of a spindle structure of an eight-slot structure according to the present invention;
FIG. 5 is a first schematic diagram of the structure of the punching sheet of the present invention;
fig. 6 is a schematic diagram of a punching sheet structure of the invention.
In the figure: 1. a main shaft; 11. a card slot; 12. a through hole; 2. a tooth block; 3. punching; 31. a tooth body; 32. a clamping block; 33. a crown; 34. a protrusion; 35. a yoke portion; 36. a groove; 4. a motor shaft.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 6, the present invention provides a rotor core of an electric machine, which specifically includes a main shaft 1 and a plurality of rows of tooth blocks 2; wherein, a plurality of rows of tooth blocks 2 are evenly distributed in the circumferential direction of the outer wall of the main shaft 1 side by side, and each tooth block 2 is formed by overlapping a plurality of punching sheets 3; the motor rotor core provided by the invention can be like a motor rotor core which is assembled building blocks and can freely adjust the number of poles, and can be formed by splicing a main shaft 1 with different outer diameters, groove numbers and lengths and a plurality of groups of tooth blocks 2 which can be wound with copper wires, wherein each tooth block 2 is formed by mutually overlapping a plurality of punching sheets 3; the motor rotor core provided by the invention is an assembled motor core which can be freely matched and combined, can be used as an inner stator core of a motor and also can be used as a rotor core of a generator, and can be better suitable for the production flow which tends to automatic production at present; the invention provides a motor rotor core, which can effectively improve the utilization rate of punching sheet materials in the motor rotor core, enables the positioning of a straight slot and a skewed slot to be more convenient, and reduces the manufacturing cost of the motor rotor core.
Preferably, in combination with the above scheme, as shown in fig. 1 to 6, a plurality of clamping grooves 11 are arranged on the outer wall of the main shaft 1; a plurality of clamping grooves 11 are distributed in the circumferential direction of the outer wall of the main shaft 1 side by side along the axial direction of the main shaft 1; furthermore, the multiple punching sheets 3 are clamped in the clamping groove 11 through a clamping block 32 at one end part of each punching sheet and can slide along the clamping groove 11, so that the punching sheets are overlapped to form the tooth block 2; further, the latch 32 can be clamped in the slot 11 in the radial direction of the spindle 1 and can slide in the axial direction of the spindle 1.
Preferably, with reference to the above schemes, as shown in fig. 1 to 6, in this embodiment, the slot 11 is specifically a dovetail groove structure, and the fixture block 32 is specifically a dovetail structure, and the dovetail structure is adapted to the dovetail groove structure, that is, a dovetail-shaped fixture block structure is extended from the bottom end of the stamped piece 3, and can be matched with dovetail grooves on the main shaft 1 with different outer diameters, groove numbers and lengths; it should be noted that, the dovetail structure referred to in the present invention may specifically refer to a structure with "ㄥ" on both sides; further, the clamping groove 11 is of a trapezoid groove structure, the clamping block 32 is of a trapezoid structure, and the trapezoid structure is matched with the trapezoid structure, so that clamping, assembling and sliding superposition can be achieved to form the tooth block 2.
Preferably, in combination with the above solution, as shown in fig. 1 to 6, the rows of tooth blocks 2 are distributed on the outer wall of the main shaft 1 along the axial direction of the main shaft 1; the bottom surface of the clamping groove 11 is an arc surface, the bottom surface of the fixture block 32 is an arc surface, and the circle centers of the clamping groove 11 and the fixture block 32 arc surfaces are concentrically arranged with the circle center of the spindle 1, namely, the circle centers of the clamping groove 11 and the fixture block 32 arc surfaces are superposed with the circle center of the spindle 1; specifically, the number of the clamping grooves on the outer wall surface of the main shaft 1 is consistent with the number of rows of the tooth blocks 2; as shown in fig. 3, preferably, the number of the slots and the number of rows of the tooth blocks 2 are 10, that is, 10 slots are provided on each section of the spindle 1, and 10 rows of the fixture blocks 2 are provided at the same time, and each row of the fixture blocks 2 is formed by stacking a plurality of single-tooth punching sheets; as shown in fig. 4, preferably, the number of the slots and the number of rows of the tooth blocks 2 are respectively 8, that is, 8 slots are provided on each section of the spindle 1, and 8 rows of the fixture blocks 2 are provided at the same time, and each row of the fixture blocks 2 is formed by stacking a plurality of single-tooth punching sheets; the invention provides a motor rotor core, which can freely select the number of pole pairs of a rotor, can freely adjust the number of grooves and the outer diameter of the rotor by selecting main shafts with different outer diameters and different groove numbers, can freely adjust the height of the rotor by selecting the main shafts with different lengths, improves the material utilization rate of the motor core, and has the advantages of simple structure, convenient assembly and high positioning precision due to the mutual matching of a dovetail groove and a dovetail-shaped fixture block.
Preferably, with reference to the above scheme, as shown in fig. 1 to 6, the sheet 3 is a single-tooth sheet structure, specifically, the single-tooth sheet structure includes a tooth body 31 and a tooth crown 32, and the fixture block 32 is disposed at the bottom of the tooth body 31 and is integrally formed with the tooth body 31; further, a crown 32 is provided on the top of the tooth body 31 and is integrally formed with the tooth body 31.
Preferably, in combination with the above solutions, as shown in fig. 1 to 6, the tooth crown 32 extends to both sides of the tooth body 31 to form a T-shaped structure, and the joint of the tooth crown 32 and the tooth body 31 forms a yoke 35, and the yoke 35 has a meshing section; the plurality of tooth bodies 31 are stacked to form a tooth body portion of the tooth block 2, which is used for winding a copper wire.
Preferably, in combination with the above solution, as shown in fig. 1 to 6, a protrusion 34 is provided on the upper end surface of the crown 32, a groove 36 is provided on the lower end surface of the crown 32, and the protrusion 34 is adapted to the groove 36; adjacent punching sheets 3 are positioned through the protrusions 34 and the grooves 36; specifically, a small protrusion 34 and a groove matched with the small protrusion on the back of the single-tooth punching sheet tooth crown 32 are arranged on the tooth crown 32 of each single-tooth punching sheet, so that the pressure superposed between the single punching sheets can be ensured.
Preferably, with the above scheme, as shown in fig. 1 to 6, the positions or structures of the protrusions 34 and the grooves 36 on each punching sheet 3 are not the same, that is, the design structures of the protrusions 34 on each punching sheet are different, the design structures of the grooves 36 on each punching sheet are different, but it is required to ensure that the design positions of the protrusions 34 and the grooves on adjacent punching sheets 3 are the same, and the structures of the protrusions 34 and the grooves on adjacent punching sheets 3 are the same.
Preferably, in combination with the above solution, as shown in fig. 1 to 6, the motor rotor core further includes a motor shaft 4; a through hole 12 is arranged in the main shaft 1 along the axial direction, and one end of the motor shaft 4 penetrates through the through hole 12 and is fixedly connected with the main shaft 1.
Correspondingly, in combination with the above solutions, as shown in fig. 1 to 6, the present invention further provides a motor, including a motor rotor core; the motor rotor iron core is the motor rotor iron core.
The invention provides a motor rotor iron core, which can be freely matched and is formed by splicing a plurality of sizes of main shafts with tooth sockets and a plurality of groups of iron core tooth blocks wound with coils, wherein each row of tooth blocks is formed by mutually overlapping a plurality of independent punching sheet units; the punching sheet has the advantages that the protrusions with different angles are arranged on each single punching sheet, the corresponding grooves are formed in the back of the punching sheet, different protrusions and grooves can be selected to correspond to each other when the punching sheet is laminated, the protrusions are used for positioning the angles of the straight groove, the inclined groove and the inclined groove, the laminating freedom of the punching sheet and the repeated utilization of materials are achieved, the utilization rate of the materials and multiple possibilities of material combination are improved, the positioning difficulty of the straight groove and the inclined groove is effectively improved, the process cost is reduced, and the utilization rate of the materials is increased.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.

Claims (10)

1. The motor rotor iron core is characterized by comprising a main shaft (1) and a plurality of rows of tooth blocks (2); the rows of the tooth blocks (2) are uniformly distributed on the periphery of the outer wall of the main shaft (1); the tooth block (2) is formed by overlapping a plurality of punching sheets (3).
2. The motor rotor core according to claim 1, wherein a plurality of clamping grooves (11) are arranged on the outer wall of the main shaft (1); the clamping grooves (11) are distributed in the circumferential direction of the outer wall of the main shaft (1) side by side along the axial direction of the main shaft (1); the punching sheets (3) are clamped in the clamping grooves (11) through clamping blocks (32) at one end parts of the punching sheets and can slide along the clamping grooves (11), so that the tooth blocks (2) are formed in a superposed mode.
3. The motor rotor core according to claim 2, wherein the slot (11) is a dovetail groove structure, and the fixture block (32) is a dovetail structure, and the dovetail structure is matched with the dovetail groove structure; or the clamping groove (11) is of a trapezoid groove structure, the clamping block (32) is of a trapezoid structure, and the trapezoid structure is matched with the trapezoid structure.
4. The electric machine rotor core according to any one of claims 2 to 3, characterized in that the rows of tooth blocks (2) are distributed on the outer wall of the main shaft (1) along the axial direction of the main shaft (1); the bottom surface of the clamping groove (11) is an arc surface, the bottom surface of the clamping block (32) is an arc surface, and the circle centers of the clamping groove (11) and the arc surface of the clamping block (32) and the circle center of the main shaft (1) are concentrically arranged.
5. The motor rotor core according to any one of claims 2 to 3, wherein the lamination (3) is a single-tooth lamination structure, the single-tooth lamination structure comprises a tooth body (31) and a tooth crown (32), the fixture block (32) is arranged at the bottom of the tooth body (31), and the tooth crown (32) is arranged at the top of the tooth body (31).
6. The motor rotor core according to claim 5, wherein the tooth crowns (32) extend towards two sides of the tooth body (31) respectively to form a T-shaped structure, and a yoke part (35) is formed at the joint of the tooth crowns (32) and the tooth body (31); the tooth bodies (31) are overlapped to form the tooth body parts of the tooth blocks (2), and the tooth body parts are used for winding copper wires.
7. The motor rotor core according to claim 5, wherein the upper end surface of the tooth crown (32) is provided with a protrusion (34), the lower end surface of the tooth crown (32) is provided with a groove (36), and the protrusion (34) is matched with the groove (36); the adjacent punching sheets (3) are positioned through the protrusions (34) and the grooves (36).
8. The motor rotor core according to claim 7, wherein the arrangement positions or structures of the protrusions (34) and the grooves (36) on each punching sheet (3) are different, and the arrangement positions or structures of the protrusions (34) and the grooves (36) on adjacent punching sheets (3) are the same.
9. The electric machine rotor core according to claim 1, further comprising a motor shaft (4); a through hole (12) is formed in the main shaft (1) along the axial direction of the main shaft, and one end of the motor shaft (4) penetrates through the through hole (12) and is fixedly connected with the main shaft (1).
10. An electric machine comprising a machine rotor core; the motor rotor core is characterized in that the motor rotor core is the motor rotor core as claimed in any one of claims 1 to 9.
CN202011262929.3A 2020-11-12 2020-11-12 Motor rotor iron core and motor Pending CN112290705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011262929.3A CN112290705A (en) 2020-11-12 2020-11-12 Motor rotor iron core and motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011262929.3A CN112290705A (en) 2020-11-12 2020-11-12 Motor rotor iron core and motor

Publications (1)

Publication Number Publication Date
CN112290705A true CN112290705A (en) 2021-01-29

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ID=74399499

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011262929.3A Pending CN112290705A (en) 2020-11-12 2020-11-12 Motor rotor iron core and motor

Country Status (1)

Country Link
CN (1) CN112290705A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113472161A (en) * 2021-04-15 2021-10-01 河北工业职业技术学院 Universal rotor
CN114793027A (en) * 2022-06-21 2022-07-26 宁波震裕科技股份有限公司 Drawing type wound rotor core

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113472161A (en) * 2021-04-15 2021-10-01 河北工业职业技术学院 Universal rotor
CN114793027A (en) * 2022-06-21 2022-07-26 宁波震裕科技股份有限公司 Drawing type wound rotor core

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