CN211296364U

CN211296364U - Punching sheet and rotor for permanent magnet motor and permanent magnet motor

Info

Publication number: CN211296364U
Application number: CN202020252762.1U
Authority: CN
Inventors: 孙即明; 杜爱娟
Original assignee: Qingdao CCS Electric Corp
Current assignee: Qingdao CCS Electric Corp
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-08-18
Anticipated expiration: 2030-03-04

Abstract

The utility model discloses a punching sheet, a rotor and a permanent magnet motor for a permanent magnet motor, wherein the permanent magnet motor comprises a rotor; the rotor comprises an iron core and a permanent magnet; the punching sheet is a section of circular arc of a flat-plate-shaped circular ring; the plurality of punching sheets form the circular ring; a plurality of the circular rings are stacked to form the iron core; the punching sheet comprises an inner circumference and an outer circumference; a plurality of first through holes matched with the permanent magnets in installation are uniformly formed along the outer circumference and used for installing the permanent magnets; and a plurality of magnetic isolation through holes are respectively arranged on the inner side of each first through hole along the arc direction of the circular ring and are adjacently connected. The utility model discloses a set up confined first through-hole installation permanent magnet, make a plurality of towards the iron core that the piece stack formed form the confined space and be used for installing the permanent magnet, isolated outside air and magnetic field slow down the speed of permanent magnet oxidation, improve anti demagnetization ability; in addition, the magnetic isolation through holes which are connected adjacently are arranged, so that magnetic leakage is reduced, and the efficiency of the permanent magnet is improved.

Description

Punching sheet and rotor for permanent magnet motor and permanent magnet motor

Technical Field

The utility model belongs to the technical field of permanent-magnet machine, specifically speaking relates to a towards piece, rotor and permanent-magnet machine for permanent-magnet machine.

Background

The iron core of the traditional built-in permanent magnet motor rotor is manufactured by laminating and punching sheets, the precision of the iron core is not high due to manufacturing errors, and the magnetic leakage is large due to the permanent magnet mounting structure, so that the motor performance is influenced.

Disclosure of Invention

The utility model provides a towards piece, rotor and permanent-magnet machine for permanent-magnet machine reduces the magnetic leakage, improves anti demagnetization ability.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

a punching sheet for a permanent magnet motor, the permanent magnet motor comprises a rotor; the rotor comprises an iron core and a permanent magnet;

the punching sheet is a section of circular arc of a flat-plate-shaped circular ring; the plurality of punching sheets form the circular ring; a plurality of the circular rings are stacked to form the iron core;

the punching sheet comprises an inner circumference and an outer circumference;

a plurality of first through holes matched with the permanent magnets in installation are uniformly formed along the outer circumference and used for installing the permanent magnets;

and a plurality of magnetic isolation through holes are respectively arranged on the inner side of each first through hole along the arc direction of the circular ring and are adjacently connected.

Preferably, the magnetism isolating through hole comprises a second through hole and a third through hole; each second through hole is correspondingly communicated with each first through hole through a connecting part; the width of the connecting part is smaller than that of the first through hole;

each third through hole is respectively positioned between two adjacent second through holes.

Further, the rotor also comprises a bracket and a fixing piece;

the bracket is cylindrical, and a plurality of rows of vertically arranged fourth through holes are formed in the wall of the cylinder;

a plurality of open pores, including openings, are disposed along the inner circumference; the width of the opening is smaller than the width of the opening hole;

the fixing piece is matched with the opening hole in an installing mode; threaded holes are respectively formed in the positions, corresponding to the fourth through holes, of the fixing piece;

when the punching sheets are stacked, the open holes form a groove; the fixing piece is installed in the groove and fixedly connected with the support through a bolt.

Preferably, the shape of the opening hole is wedge-shaped, and the opening hole comprises a bottom edge end and a top edge end; the top edge end is provided as the opening.

Preferably, when the circular ring is formed by a plurality of punching sheets, the opening holes are uniformly distributed on the circular ring.

Further, in the above-mentioned case,

the rotor also comprises a plurality of screws and a plurality of nuts which are connected and matched with the screws;

a plurality of fastening through holes matched with the screw rods in an installing mode are formed in the punching sheet;

when a plurality of circular rings are stacked, the fastening through holes respectively correspond to the circular rings; the screw rods are arranged in the corresponding fastening through holes, and the end parts of the screw rods are connected with the nuts.

Preferably, the fastening through holes comprise a fifth through hole and a sixth through hole; each fifth through hole is respectively positioned between two adjacent first through holes and used for fastening the outer circumference;

each of the sixth through holes is located inside the inner circumference for fastening the inner circumference.

A rotor for a permanent magnet motor comprises an iron core and is formed by stacking a plurality of punching sheets.

Preferably, a plurality of the punching sheets form a circular ring; a plurality of the circular rings are stacked to form the iron core; and the punching sheets adjacent to the circular rings are overlapped in a staggered mode.

A permanent magnet motor comprises the rotor.

Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model discloses a towards piece, rotor and permanent-magnet machine for permanent-magnet machine installs the permanent magnet through setting up confined first through-hole, makes the iron core that a plurality of towards pieces of lamination formed form confined space and is used for installing the permanent magnet, isolated outside air and magnetic field, slows down the speed of permanent magnet oxidation, improves anti demagnetization ability to improve permanent-magnet machine life-span; in addition, the adjacent magnetic isolation through holes are arranged, so that the magnetic path towards the inner side of the permanent magnet is isolated by the magnetic isolation through holes, more magnetic paths pass through one side of the outer circumference, the magnetic leakage is reduced, and the efficiency of the permanent magnet is improved.

Drawings

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

Fig. 1 is a schematic structural diagram of an embodiment of a punching sheet for a permanent magnet motor according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a rotor for a permanent magnet motor according to the present invention;

FIG. 3 is a schematic structural view of an embodiment of the rotor of FIG. 2;

fig. 4 is a schematic structural diagram of another embodiment of a rotor for a permanent magnet motor according to the present invention;

fig. 5 is a schematic structural view of the end plate of the embodiment in fig. 4.

In the figure, the position of the upper end of the main shaft,

1. punching; 2. a permanent magnet; 3. a fixing member; 4. a support; 5. a bolt; 6. a circular ring; 7. a nut; 8. a first end plate; 9. a second end plate; 10. a screw; 20. a process baffle plate; 11. an inner circumference; 12. an outer circumference; 13. an open pore; 14. a first through hole; 15. a second through hole; 16. a third through hole; 17. a groove; 18. a fifth through hole; 19. a sixth through hole; 31. a threaded hole; 41. a fourth via hole; 81. corresponding to the opening hole; 82. corresponding to the first through hole; 83. corresponding to the fifth through hole; 84. opening the groove; 85. corresponding to the sixth through hole; 91. a seventh via hole; 01. an iron core; 131. and (4) opening.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Examples

Referring to fig. 1, 2 and 4, the permanent magnet motor of the present embodiment includes a rotor; the rotor comprises an iron core 01, a bracket 4 and a permanent magnet 2. The iron core 01 is formed by stacking a plurality of circular rings 6 formed by punching sheets 1. The punching sheet 1 of the embodiment is a section of circular arc of a flat-plate-shaped circular ring 6. The multiple punching sheets 1 can be spliced into a complete circular ring 6.

Preferably, the punching sheet 1 is a part of the uniform-dividing circular ring 6, that is, the circular ring 6 is formed by a plurality of identical punching sheets 1. The circular ring 6 and the punching sheet 1 comprise an inner circumference 11 and an outer circumference 12. Each inner circumference 11 constitutes an inner wall of the core 01.

Of course, a complete ring 6 can be formed for punching sheets 1 with different lengths, and then a plurality of rings 6 are stacked to manufacture the iron core 01.

The support 4 is a cylindrical structure, is matched with the inner wall of the iron core 01 in an installation manner, and is installed in the iron core 01.

In order to make the inner wall of the iron core 01 closely attached to the bracket 4 and reduce the gap between the bracket 4 and the iron core 01, a plurality of opening holes 13 including openings 131 are uniformly arranged along the inner circumference 11 of the circular ring 6; the width of the opening 131 is smaller than the width of the opening hole 13. When a plurality of punching sheets 1 are stacked into an iron core 01, a groove 17 is formed in each corresponding opening hole 13; the iron core 01 is fixedly connected with the bracket 4 by the fixing piece 3 which is connected with the groove 17 and matched with the groove 17 after passing through the groove 17. The iron core 01 and the bracket 4 are more closely connected through the fastening of the fixing piece 3 and the bracket 4.

Preferably, the shape of the open hole 13 is wedge-shaped; the opening hole 13 comprises a top edge end and a bottom edge end; the top edge end is provided with an opening 131; the groove 17 is a wedge-shaped groove; the fixing member 3 is a rib member including a cylinder having a wedge-shaped cross section or a groove having a wedge-shaped cross section.

Preferably, a plurality of rows of fourth through holes 41 which are vertically and uniformly distributed are arranged on the bracket 4 corresponding to the positions of the fixing pieces 3; threaded holes 31 are respectively formed in the fixing member 3 at positions corresponding to the fourth through holes 41; each of the fixing members 3 is fixedly connected to the bracket 4 by a plurality of bolts 5, which are connected to the screw holes 31, passing through each of the fourth through holes 41 and being screwed into the corresponding screw hole 31. The more the bolt 5 is screwed, the smaller the gap between the fixing member 3 and the bracket 4, that is, the gap between the inner wall of the iron core 01 and the bracket 4.

Preferably, during the installation process, the fixing member 3 is first fixedly connected with the bracket 4; then, the open hole 13 of the punching sheet 1 is sleeved on the fixing piece 3 to install the punching sheet 1, so that the fixing piece 3 has a guiding effect on the punching sheet 1, the installation accuracy of the punching sheet 1 is improved, and the motor assembling efficiency is further improved.

Referring to fig. 1, 2, 3 and 4, a plurality of first through holes 14 are uniformly provided along an outer circumference 12 of the ring 6; when the plurality of rings 6 are stacked to form the iron core 01, the first through holes 14 of the rings 6 correspond to each other, and a passage in the shape of the first through hole 14 is formed for mounting the permanent magnet 2.

The inner sides of the first through holes 14 are provided with magnetic isolation through holes which are connected adjacently, so that the magnetic circuit of the permanent magnet 2 is isolated by the magnetic isolation through holes, more magnetic circuits are formed on the outer side of the rotor, and the efficiency of the permanent magnet 2 is improved.

Preferably, the magnetic isolation through holes comprise a second through hole 15 and a third through hole 16; each second through hole 15 is communicated with each first through hole 14 through a connecting part; the width of connecting portion is less than the width of first through-hole 14, makes permanent magnet 2 and the installation adaptation of first through-hole 14, improves rotor quality.

Each third through hole 16 is located between two adjacent second through holes 15.

The connection distance range of the adjacent second through holes 15 and the third through holes 16 is 1-5 mm, and magnetic leakage is reduced.

Referring to fig. 1, 2, 3 and 4, a plurality of fastening through holes are provided in the punch sheet 1 for fastening the core 01. The rotor also comprises a plurality of bolts 10 and a plurality of nuts 7 which are in threaded connection and fit with the screw rods 10; when a plurality of circular rings 6 are stacked to form the iron core 01, the screw rods 10 penetrate through the corresponding fastening through holes, and the end parts of the screw rods are connected with the nuts 7; the core 01 is formed by integrally connecting the respective laminations 1 by fastening nuts 7.

Preferably, the fastening through holes include a fifth through hole 18, a sixth through hole 19; each fifth through hole 18 is respectively positioned between adjacent first through holes 14; the screw rods 10 are arranged in the corresponding fifth through holes 18, the end parts of the screw rods are connected with the nuts 7, and the outer circumference 12 of the iron core 01 is fastened; each sixth through hole 19 is provided inside the inner circumference 11, and the screw 10 is installed in the corresponding sixth through hole 19, and the end is connected to the nut 7 to fasten the inner circumference 11 of the core 01.

Preferably, referring to fig. 3, the punching sheets 1 of the rings 6 are stacked in a staggered manner. That is, the connecting edges of the stamped steel 1 and the stamped steel 1 forming the circular ring 6 are staggered from the connecting edges of the adjacent circular rings 6, and do not correspond to each other. The iron core 01 formed by stacking the punching sheets 1 is more firmly integrated into a whole through the friction force between the adjacent circular rings 6; in addition, the problem that the thicknesses of the iron cores 01 in the axial direction are inconsistent due to the thickness difference of raw materials can be solved by the staggered overlapping of the punching sheets 1 of the adjacent circular rings 6, and the quality of the iron cores 01 is improved.

Referring to fig. 4 and 5, the permanent magnet motor and the motor rotor of the present embodiment further include an end plate for fixing the permanent magnet 2 in the first through hole 14.

The end plate comprises a first end plate 8, and the shape and the size of the first end plate are the same as those of the punching sheet 1. And the positions corresponding to the open hole 13 and the first through hole 14 of the punching sheet 1 are respectively provided with a corresponding open hole 81 and a corresponding first through hole 82; the first end plate 8 is located at the end of the iron core 01 and outside the stamped steel 1, is connected with the stamped steel 1, corresponds to the opening hole 81 and the groove 17, corresponds to the first through hole 82 and the first through hole 14, and is fixedly connected with the bracket 4 through the fixing member 3.

The permanent magnet 2 has the tendency of outward jumping when being arranged in the groove 17; for the convenience of installation, an opening groove 84 is respectively arranged on the inner side of each corresponding first through hole 82 of the first end plate 8, the opening of the opening groove 84 faces to the outer side and is used for installing the process baffle 20, after the permanent magnet 2 is installed in the first through hole 14 from the corresponding first through hole 82, the process baffle 20 is inserted into the opening groove 84, and the process baffle 20 is pressed in the opening groove 84 by the permanent magnet 2, so that the permanent magnet 2 is prevented from escaping from the groove 17.

Preferably, corresponding fastening through holes are respectively arranged at positions corresponding to the fastening through holes, and comprise corresponding fifth through holes 83 and corresponding sixth through holes 85; similarly, the screw 10 is connected with the nut 7 after passing through the corresponding fifth through hole 18 and the corresponding fifth through hole 83; the screw 10 passes through the corresponding sixth through hole 19 and the corresponding sixth through hole 85 and then is connected with the nut 7; the first end plate 8 is fixedly connected to the core 01.

Preferably, the end plate further comprises a second end plate 9, which is an arc-shaped flat plate structure, is located outside the first end plate 8, is connected with the first end plate 8, and covers each first through hole 14.

Preferably, seventh through holes 91 are respectively formed in the second end plate 9 at positions corresponding to the fifth through holes 84, and the screws 10 are connected to the nuts 7 after passing through the corresponding fifth through holes 18, the corresponding fifth through holes 85, and the seventh through holes 91, respectively, so that the second end plate 9 is connected to the first end plate 8 and covers the corresponding first through holes 82. At this time, each process stopper 20 is pulled out, and the tightness of the core 01 is adjusted by tightening the nut 7 at the end of the screw 10.

Of course, the nuts 7 fastening the ends of the screws 10 and the bolts 5 fastening the connecting bracket 4 and the fixing member 3 may be alternately performed to optimize the tightness of the core 01 and the gap with the bracket 4.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A punching sheet for a permanent magnet motor, the permanent magnet motor comprises a rotor; the rotor comprises an iron core and a permanent magnet; it is characterized in that the preparation method is characterized in that,

the punching sheet comprises an inner circumference and an outer circumference;

2. The punching sheet according to claim 1, wherein the magnetism isolating through hole comprises a second through hole and a third through hole; each second through hole is correspondingly communicated with each first through hole through a connecting part; the width of the connecting part is smaller than that of the first through hole;

3. The punching sheet according to claim 2, wherein the rotor further comprises a bracket and a fixing piece;

4. The punch sheet of claim 3, wherein the open hole is wedge-shaped and includes a bottom edge and a top edge; the top edge end is provided as the opening.

5. The punch according to claim 4, wherein when a plurality of the punches form the ring, the open holes are evenly distributed on the ring.

6. The punch according to any one of claims 1 to 5, characterized in that,

7. The punching sheet according to claim 6, wherein the fastening through holes comprise a fifth through hole and a sixth through hole; each fifth through hole is respectively positioned between two adjacent first through holes and used for fastening the outer circumference;

8. A rotor for a permanent magnet electrical machine, comprising an iron core laminated with a plurality of laminations as claimed in any one of claims 1 to 7.

9. The rotor as recited in claim 8, wherein a plurality of said laminations form a ring; a plurality of the circular rings are stacked to form the iron core; and the punching sheets adjacent to the circular rings are overlapped in a staggered mode.

10. A permanent magnet electrical machine comprising a rotor according to claim 8 or 9.