CN113036958A

CN113036958A - Rotor and motor

Info

Publication number: CN113036958A
Application number: CN202110486485.XA
Authority: CN
Inventors: 郑泽锋; 吴广荣; 张凯
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-06-25
Anticipated expiration: 2041-04-30
Also published as: CN113036958B

Abstract

The invention provides a rotor and a motor, wherein the rotor comprises an iron core and a limiting structure, the iron core is formed by stacking a plurality of punching sheets, the iron core is provided with a jack penetrating through the plurality of punching sheets, the maximum size of the jack in the radial direction of the iron core is A, the minimum size of the jack in the circumferential direction of the iron core is B, and A is less than B; the limiting structure comprises a plug connector which is arranged in the jack in a penetrating way; on the radial section of the iron core, the shape of the plug connector is matched with that of the jack. Adopt this scheme, set up the jack on the iron core into the structure that radial dimension is less than the circumference size to limit structure's plug connector cross section sets up the structure that matches with the shape of jack, also can understand for the more flat that jack and plug connector all do, has reduced the occupation of jack and plug connector to the radial dimension of iron core like this, thereby to the less rotor of punching the piece area, has realized adopting the plug connector to carry on spacingly. Compared with the fixation by glue, the manufacturing process difficulty of the rotor is reduced, and the structural reliability is improved.

Description

Rotor and motor

Technical Field

The invention relates to the technical field of motors, in particular to a rotor and a motor.

Background

The motor mainly comprises two parts of stator and rotor, and the rotor includes iron core and accessory, and the accessory mainly includes rivet, balancing weight. The iron core is formed by laminating a plurality of punching sheets, generally, a rivet penetrates into the punching sheets, and then the rivet is locked at a rivet hole to realize the compression of the punching sheets.

When punching the piece area sufficient, generally can set up a plurality of rivet holes on the iron core, the cooperation rivet will compress tightly towards the piece. When the punching sheet area is smaller, the rivet hole which enables the rotor to guarantee the minimum diameter of the structural strength of the rotor is not enough opened, the glue is only used for matching and laminating the tooling for assembling, then the glue is dried, and the punching sheet is shaped. The use of glue is inferior to the use of rivets in terms of workability and reliability.

Therefore, it is necessary to improve the rotor with a smaller area of the punching sheet, so as to reduce the difficulty of the manufacturing process of the rotor and improve the structural reliability.

Disclosure of Invention

The invention provides a rotor and a motor, which are used for reducing the manufacturing process difficulty of the rotor and improving the structural reliability.

In order to achieve the above object, according to one aspect of the present invention, there is provided a rotor including: the iron core is formed by stacking a plurality of punching sheets, the iron core is provided with jacks penetrating through the punching sheets, the maximum size of the jacks in the radial direction of the iron core is A, the minimum size of the jacks in the circumferential direction of the iron core is B, and A is less than B; the limiting structure comprises a plug connector which is inserted into the jack; on the radial cross section of the iron core, the shape of the plug connector is matched with that of the jack.

Furthermore, the plug connector is of an arc-shaped plate structure or a flat plate structure.

Further, the thickness of plug connector is 1mm to 3.5 mm.

Further, limit structure still includes: the first limiting part is connected with one end of the plug connector and is used for limiting one side of the iron core; the second limiting part is detachably connected with the other end of the plug connector, and the second limiting part is used for limiting the other side of the iron core.

Further, the first limit portion includes: the first connecting piece is arranged at one end of the plug piece; the limiting part is connected with the first connecting piece, the limiting part is movably arranged along the length direction of the jack, and the limiting part is used for limiting one side of the iron core.

Furthermore, the locating part has an external thread, the first locating part further comprises a second connecting piece, the second connecting piece is in limit fit with the first connecting piece, the second connecting piece has an internal thread, and the locating part is in threaded connection with the second connecting piece.

Furthermore, one side of the first connecting piece, which faces the iron core, is provided with a first groove, and the outer wall of the second connecting piece is in circumferential limit fit with the inner wall of the first groove.

Further, the other end of plug connector has the draw-in groove, partly card of the spacing portion of second is gone into in the draw-in groove, the spacing portion of second with the iron core butt.

Further, the spacing portion of second is including the first plate body, second plate body and the third plate body that connect gradually, the first plate body the second plate body with the third plate body is around forming and dodging the groove, wherein, the second plate body with the draw-in groove joint, the first plate body with the third plate body is located respectively the both sides of plug connector.

Further, the rotor further includes: the balancing weight, the balancing weight sets up one side of iron core, the balancing weight have with the through-hole of jack intercommunication, the plug connector passes the through-hole, wherein, first spacing portion with the balancing weight deviates from one side butt of iron core.

Further, first spacing portion includes first connecting piece and locating part, first connecting piece sets up the one end of plug connector, the locating part with first connecting piece is connected, the locating part is followed the movably setting of length direction of jack, the balancing weight has the second recess, the locating part with the tank bottom butt of second recess.

Furthermore, the limiting piece is provided with an external thread, the first limiting part further comprises a second connecting piece, the second connecting piece is in limiting fit with the first connecting piece, the second connecting piece is provided with an internal thread, and the limiting piece is in threaded connection with the second connecting piece; and under the condition that the second connecting piece is positioned in the second groove, the outer wall of the second connecting piece is in circumferential limit fit with the inner wall of the second groove.

Further, the rotor still includes magnet steel, the outside of iron core has the mounting groove, magnet steel sets up in the mounting groove.

According to another aspect of the present invention, there is provided an electric machine comprising the rotor as described above.

The technical scheme of the invention is applied, and the rotor comprises an iron core and a limiting structure, wherein the iron core is formed by stacking a plurality of punching sheets, the iron core is provided with a jack penetrating through the plurality of punching sheets, the maximum size of the jack in the radial direction of the iron core is A, and the minimum size of the jack in the circumferential direction of the iron core is B, wherein A is less than B; the limiting structure comprises a plug connector which is arranged in the jack in a penetrating way; on the radial section of the iron core, the shape of the plug connector is matched with that of the jack. Adopt this scheme, set up the jack on the iron core into the structure that radial dimension is less than the circumference size to limit structure's plug connector cross section sets up the structure that matches with the shape of jack, also can understand for the more flat that jack and plug connector all do, has reduced the occupation of jack and plug connector to the radial dimension of iron core like this, thereby to the less rotor of punching the piece area, has realized adopting the plug connector to carry on spacingly. Compared with the fixation by glue, the manufacturing process difficulty of the rotor is reduced, and the structural reliability is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a schematic structural view of a rotor provided by an embodiment of the present invention;

FIG. 2 shows a cross-sectional view of the rotor of FIG. 1;

FIG. 3 shows a schematic view of the spacing structure of FIG. 1;

FIG. 4 shows a schematic diagram of the core, weight and magnetic steel of FIG. 1;

fig. 5 shows an assembly diagram of the spacing structure of fig. 1.

Wherein the figures include the following reference numerals:

10. an iron core; 11. a jack; 20. a limiting structure; 30. a plug-in unit; 31. a card slot; 40. a first limiting part; 41. a first connecting member; 42. a limiting member; 43. a second connecting member; 44. a first groove; 50. a second limiting part; 51. a first plate body; 52. a second plate body; 53. a third plate body; 54. an avoidance groove; 60. a balancing weight; 61. a through hole; 62. a second groove; 70. and (5) magnetic steel.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, an embodiment of the present invention provides a rotor including: the iron core 10 is formed by stacking a plurality of punching sheets, the iron core 10 is provided with a jack 11 penetrating through the punching sheets, the maximum size of the jack 11 in the radial direction of the iron core 10 is A, the minimum size of the jack 11 in the circumferential direction of the iron core 10 is B, and A is less than B; the limiting structure 20, the limiting structure 20 includes a plug connector 30, and the plug connector 30 is inserted in the jack 11; in a radial cross section of the core 10, the shape of the plug 30 matches the shape of the receptacle 11.

Adopt this scheme, jack 11 on the iron core 10 sets up to the structure that radial dimension is less than circumferential dimension to limit structure 20's plug connector 30 cross section sets up to the structure that matches with the shape of jack 11, this also can understand that jack 11 and plug connector 30 are all done more flat, rather than cylindricly, has reduced jack 11 and plug connector 30 to the occupation of iron core 10 radial dimension under the condition of guaranteeing structural strength like this, thereby to the less rotor of punching the piece area, realized adopting plug connector 30 to carry on spacingly. Compared with the mode of fixing by using glue, the mode reduces the manufacturing process difficulty of the rotor and improves the structural reliability.

Wherein, jack 11 can set up to a plurality ofly, and a plurality of jacks 11 distribute along the circumference of iron core 10, and limit structure 20 can set up to a plurality ofly, and a plurality of limit structure 20 and a plurality of jacks 11 one-to-one set up, and limit structure 20 can be spacing to iron core 10 better like this to improve the structural strength of rotor.

In the present embodiment, the plug 30 has an arc-shaped plate structure or a flat plate structure. The plug connector 30 is set to be of a plate-shaped structure, so that the radial size of the iron core 10 occupied by the plug connector 30 can be reduced, and the plug connector can be inserted into the iron core 10 with a small punching sheet area. The strength of the plug 30 can be secured by increasing the size in the circumferential direction of the core 10.

Specifically, the thickness of the plug 30 may be set to 1mm to 3.5 mm. The stopper structure 20 may be made of a metallic material or a non-metallic material.

In this embodiment, the limiting structure 20 further includes: the first limiting part 40, the first limiting part 40 is connected with one end of the plug-in connector 30, the first limiting part 40 is used for limiting one side of the iron core 10; and the second limiting part 50, the second limiting part 50 and the other end of the plug-in connector 30 are detachably connected, and the second limiting part 50 is used for limiting the other side of the iron core 10. Thus, the first limiting portion 40 and the second limiting portion 50 can limit the axial direction of the iron core 10, so that a plurality of punching sheets are clamped.

In the present embodiment, the first stopper portion 40 includes: a first connector 41, the first connector 41 being disposed at one end of the plug-in unit 30; the limiting member 42, the limiting member 42 and the first connecting member 41 are connected, the limiting member 42 is movably disposed along the length direction of the insertion hole 11, and the limiting member 42 is used for limiting one side of the iron core 10.

Furthermore, the limiting member 42 has an external thread, the first limiting portion 40 further includes a second connecting member 43, the second connecting member 43 is in limit fit with the first connecting member 41, the second connecting member 43 has an internal thread, and the limiting member 42 is in threaded connection with the second connecting member 43. Thus, the limiting member 42 is rotated to move the limiting member 42 in the length direction of the insertion hole 11, so as to match the size of the iron core 10, and the first limiting portion 40 and the second limiting portion 50 clamp the iron core. Moreover, with the arrangement, the distance between the first limiting part 40 and the second limiting part 50 of the limiting structure 20 can be adjusted, so that the iron cores 10 with different sizes can be adapted, and the universality is improved. And the threaded connection is adopted, so that the adjustment is convenient and the connection is reliable.

In the present embodiment, the side of the first connecting member 41 facing the iron core 10 has a first groove 44, and the outer wall of the second connecting member 43 and the inner wall of the first groove 44 are in limit fit in the circumferential direction. In this way, the first connecting piece 41 and the second connecting piece 43 can be in limited fit in the circumferential direction. When the second link 43 is rotated, the second link 43 can only move in the axial direction under the restriction of the second link 43. Specifically, the second connector 43 is a nut, and the first groove 44 is a hexagonal groove.

As shown in fig. 3, the other end of the plug 30 has a notch 31, a part of the second stopper 50 is caught in the notch 31, and the second stopper 50 abuts against the core 10. Therefore, the second limiting part 50 and the plug connector 30 can be connected in a clamping manner, and the mounting and dismounting are convenient. After the second position-limiting portion 50 and the plug 30 are engaged, the second position-limiting portion 50 may limit the end surface of the core 10.

Specifically, the second limiting portion 50 includes a first board body 51, a second board body 52 and a third board body 53 connected in sequence, the first board body 51, the second board body 52 and the third board body 53 surround to form an avoiding groove 54, wherein the second board body 52 is clamped with the clamping groove 31, and the first board body 51 and the third board body 53 are respectively located on two sides of the plug connector 30. After the connection, the first plate 51 and the third plate 53 can reliably limit the position of the iron core 10.

Further, the rotor further includes: balancing weight 60, balancing weight 60 set up in one side of iron core 10, and balancing weight 60 has the through-hole 61 with the jack 11 intercommunication, and through-hole 61 is passed to plug connector 30, and wherein, first spacing portion 40 and balancing weight 60 deviate from one side butt of iron core 10. So that the position limiting structure 20 can also limit the weight block 60.

Specifically, the first limiting portion 40 includes a first connecting member 41 and a limiting member 42, the first connecting member 41 is disposed at one end of the plug member 30, the limiting member 42 is connected to the first connecting member 41, the limiting member 42 is movably disposed along the length direction of the insertion hole 11, the weight block 60 has a second groove 62, and the groove bottoms of the limiting member 42 and the second groove 62 are abutted. The second groove 62 can limit the limiting member 42. Moreover, the second groove 62 may be filled with glue, so that the limiting member 42 can be more reliably fixed, the structural reliability is improved, and the first limiting portion 40 is prevented from being loosened during rotation.

Furthermore, the limiting member 42 has an external thread, the first limiting portion 40 further includes a second connecting member 43, the second connecting member 43 is in limit fit with the first connecting member 41, the second connecting member 43 has an internal thread, and the limiting member 42 is in threaded connection with the second connecting member 43; wherein, under the condition that the second connecting piece 43 is positioned in the second groove 62, the outer wall of the second connecting piece 43 is in limited fit with the inner wall of the second groove 62 in the circumferential direction. Thus, the second connecting member 43 can be positioned and limited by the second groove 62 during assembly, thereby facilitating the positioning of the first connecting member 41 and the second connecting member 43. Specifically, the second connector 43 is a nut, and the second groove 62 is a hexagonal groove. Specifically, in the present embodiment, the second groove 62 and the first groove 44 are disposed oppositely, and both are the same in shape and size.

In this embodiment, the rotor further includes a magnetic steel 70, and the outer side of the iron core 10 has a mounting groove, and the magnetic steel 70 is disposed in the mounting groove. I.e. the rotor is a surface-mounted rotor.

Another embodiment of the present invention provides an electric machine including the rotor described above. Adopt this scheme, jack 11 on the iron core 10 sets up to the structure that radial dimension is less than circumferential dimension to limit structure 20's plug connector 30 cross section sets up to the structure that matches with the shape of jack 11, this also can understand that jack 11 and plug connector 30 are all done more flat, rather than cylindricly, has reduced jack 11 and plug connector 30 to the occupation of iron core 10 radial dimension under the condition of guaranteeing structural strength like this, thereby to the less rotor of punching the piece area, realized adopting plug connector 30 to carry on spacingly. Compared with the mode of fixing by using glue, the mode reduces the manufacturing process difficulty of the rotor and improves the structural reliability, thereby reducing the cost of the motor and improving the reliability of the motor.

When assembling the limiting structure, firstly, a nut needs to be placed in the second groove 62, and then the plug connector 30 is inserted into the hole corresponding to the counterweight block and the iron core, and at this time, the first groove 44 and the second groove 62 cover the upper end and the lower end of the nut respectively. Next, the second stopper 50 is engaged with the engaging groove 31 of the connector 30 at the tail of the connector 30. Finally, a sufficiently long retaining member 42 is inserted through the first connecting member 41 to be threadedly engaged with the nut. With the rotation of the position-limiting member 42, the nut is limited by the groove and can only move vertically upward relative to the end surface of the counterweight, so that the position-limiting member 42 is lifted to move upward integrally until the end surface of the second position-limiting portion 50 abuts against the iron core 10 and a proper amount of axial pressure is applied to the iron core 10.

When the limit structure does not interfere with the pump body, the remaining space of the second groove 62 of the counterweight block 60 can be filled with glue to adhere to the limit member 42, thereby preventing the looseness of the motor during high-speed operation.

To facilitate understanding of the present solution, the following is further described.

Among the prior art, when opening the rivet hole towards the piece area not enough, adopt glue equipment scheme to have three not enough:

the first deficiency is: if no rivet is arranged, only glue is used for bonding the balancing weight and the punching sheet on a production line, so that a link is added in the production process to ensure that the punching sheet is always in a laminated and orderly state, and although the iron core can be shaped by means of adding a buckling point on the punching sheet, the complexity of the process is increased only due to the lack of accessories for locking the punching sheet, and the reliability of the finished product is not ensured well. During manual trial production, the punched sheet is limited by being attached to the magnetic steel in a glue-free state, then the punched sheet is matched with a tool shaft to ensure coaxiality, and finally, the magnetic steel is taken down piece by piece, glued and dried to be shaped. Therefore, in general, another method which can more simply and reliably ensure the lamination coaxiality of the punching sheets and has low process difficulty needs to be found to realize the production line process manufacturing and the manual trial manufacturing of the rotor.

The second disadvantage is that: in the rotor scheme of taking the balancing weight, if the balancing weight only relies on sticky mode to fix, then when the motor actually operates, various practical factors lead to the balancing weight atress not completely even in each tangential, and if balancing weight glue quantity, the full-painting area did not control well this moment, will have the balancing weight to get rid of and take off the risk.

The third disadvantage is that: because glue is thick liquid when using, just there is bonding, design effect after drying into solid-state, and the rotor does not have the rivet, can only guarantee the axiality through the frock axle always before glue is dried, and this just leads to liquid glue can spill over balancing weight and frock axle adhesion. The conventional method for solving the problem avoids enough allowance in the space occupied by the balancing weight around the tool shaft hole, so that the tool shaft cannot be adhered when glue overflows, but the design strictly controls the use of the glue technically and does not solve the problem well.

Under the condition that the space of the rotor punching sheet is narrow, the scheme in the application can obviously reduce the realization difficulty of the rotor manufacturing process and improve the manual trial manufacturing operability of the adhesive shaped rotor punching sheet; the plug connector is equivalent to the original rivet, the mode that the balancing weight is glued is replaced, the balancing weight is fundamentally prevented from being thrown and taken off, and the structural strength and the flux linkage conduction of the rotor core are not influenced. Particularly, the plug connector structure can flexibly select whether to be disassembled according to the requirement, namely, the option of gluing the balancing weight is still left, and the rivet is inconvenient to disassemble. The plug connector has the effect of locking and punching, ensuring the coaxiality of the punching, and the locking force can be quantized, so that a laminating tool can be saved during manual trial production of the rotor, the tool does not need to be taken during glue drying, the labor and the shaft installing quantity can be saved on a production line, and the manufacturing steps are reduced. In this application, the advantage of plug connector scheme lies in that its material can select for plastics, and it is convenient to make, and the plug connector only adopts conventional standard screw can accomplish the equipment moreover. Therefore, the plug-in connector scheme is dominant in material and processing manufacturing cost.

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

Claims

1. A rotor, comprising:

the iron core (10) is formed by stacking a plurality of punching sheets, the iron core (10) is provided with a jack (11) penetrating through the punching sheets, the maximum size of the jack (11) in the radial direction of the iron core (10) is A, the minimum size of the jack (11) in the circumferential direction of the iron core (10) is B, and A is less than B;

the limiting structure (20) comprises a plug connector (30), and the plug connector (30) is inserted into the jack (11); on the radial section of the iron core (10), the shape of the plug connector (30) is matched with that of the jack (11).

2. The rotor as recited in claim 1, characterized in that the plug (30) is of an arc-plate or flat-plate construction.

3. The rotor as recited in claim 2, characterized in that the thickness of the plug (30) is 1mm to 3.5 mm.

4. The rotor according to claim 1, characterized in that the limit structure (20) further comprises:

the first limiting part (40), the first limiting part (40) is connected with one end of the plug connector (30), and the first limiting part (40) is used for limiting one side of the iron core (10);

the other end of the plug connector (30) is detachably connected with the limiting portion (50) of the second, and the limiting portion (50) of the second is used for limiting the other side of the iron core (10).

5. The rotor according to claim 4, characterized in that the first limit part (40) comprises:

a first connector (41), wherein the first connector (41) is arranged at one end of the plug connector (30);

the limiting piece (42) is connected with the first connecting piece (41), the limiting piece (42) is movably arranged along the length direction of the jack (11), and the limiting piece (42) is used for limiting one side of the iron core (10).

6. The rotor as recited in claim 5, characterized in that the limiting member (42) has an external thread, the first limiting portion (40) further comprises a second connecting member (43), the second connecting member (43) and the first connecting member (41) are in limiting fit, the second connecting member (43) has an internal thread, and the limiting member (42) and the second connecting member (43) are in threaded connection.

7. The rotor according to claim 6, characterized in that the side of the first connecting piece (41) facing the core (10) has a first groove (44), the outer wall of the second connecting piece (43) and the inner wall of the first groove (44) being in a circumferential limit fit.

8. The rotor according to claim 4, characterized in that the other end of the plug (30) has a slot (31), a part of the second limiting portion (50) is clipped into the slot (31), and the second limiting portion (50) abuts against the iron core (10).

9. The rotor of claim 8, wherein the second limiting portion (50) comprises a first plate body (51), a second plate body (52) and a third plate body (53) which are sequentially connected, the first plate body (51), the second plate body (52) and the third plate body (53) surround a forming avoiding groove (54), wherein the second plate body (52) and the clamping groove (31) are clamped, and the first plate body (51) and the third plate body (53) are respectively located at two sides of the plug connector (30).

10. The rotor of any one of claims 4 to 9, further comprising:

balancing weight (60), balancing weight (60) set up one side of iron core (10), balancing weight (60) have with through-hole (61) of jack (11) intercommunication, plug connector (30) pass through-hole (61), wherein, first spacing portion (40) with balancing weight (60) deviate from one side butt of iron core (10).

11. The rotor as recited in claim 10, wherein the first position-limiting portion (40) includes a first connecting member (41) and a position-limiting member (42), the first connecting member (41) is disposed at one end of the plug member (30), the position-limiting member (42) is connected to the first connecting member (41), the position-limiting member (42) is movably disposed along a length direction of the insertion hole (11), the weight member (60) has a second groove (62), and the position-limiting member (42) abuts against a groove bottom of the second groove (62).

12. The rotor according to claim 11, characterized in that the limiting member (42) has an external thread, the first limiting portion (40) further comprises a second connecting member (43), the second connecting member (43) is in limiting fit with the first connecting member (41), the second connecting member (43) has an internal thread, and the limiting member (42) and the second connecting member (43) are in threaded connection; wherein, under the condition that the second connecting piece (43) is positioned in the second groove (62), the outer wall of the second connecting piece (43) and the inner wall of the second groove (62) are in limited fit in the circumferential direction.

13. The rotor according to claim 1, characterized in that the rotor further comprises a magnetic steel (70), the outside of the core (10) has a mounting groove, and the magnetic steel (70) is disposed in the mounting groove.

14. An electrical machine, characterized in that the electrical machine comprises a rotor according to any one of claims 1-13.