CN110971029B - Rotor punching sheet, rotor and motor - Google Patents
Rotor punching sheet, rotor and motor Download PDFInfo
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- CN110971029B CN110971029B CN201811141312.9A CN201811141312A CN110971029B CN 110971029 B CN110971029 B CN 110971029B CN 201811141312 A CN201811141312 A CN 201811141312A CN 110971029 B CN110971029 B CN 110971029B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor punching sheet, a rotor and a motor, wherein the rotor punching sheet comprises: the first fin is provided with a first inner end and a first outer end, the width of the first fin is gradually increased from the first inner end to the first outer end, and a first magnet groove is formed in the first fin; the width of the second fin is gradually increased from the second inner end to the second outer end, the first inner end and the second inner end are connected, the first outer end and the second outer end are spaced from each other, the first fin and the second fin are axially symmetrical, the second fin is provided with a second magnet groove, the length directions of the first magnet groove and the second magnet groove are oriented in the same direction, and the first magnet groove and the second magnet groove are axially symmetrical and the symmetry axis is coincident with the symmetry axis of the first fin and the symmetry axis of the second fin. The rotor punching sheet provided by the embodiment of the invention has the advantages of simplicity in processing, convenience in use, high reliability and the like.
Description
Technical Field
The invention relates to the technical field of motor manufacturing, in particular to a rotor punching sheet, a rotor with the rotor punching sheet and a motor with the rotor.
Background
In the related technology, such as a permanent magnet motor rotor, a rotor punching sheet is of a closed-loop structure, when more magnet grooves are formed in the punching sheet, the number of magnets needing to be assembled is large, tooling equipment is difficult to design during assembly to load the magnets into the punching sheet, the problem of neglected loading is easy to occur when the magnets are manually assembled, the error rate is high when the magnets are installed, the rotor punching sheet is integrally magnetized after being loaded into the magnets, the situation of unsaturated magnetization is easy to occur, the magnetizing effect of the rotor is influenced, and therefore the using performance of the rotor is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the rotor punching sheet which has the advantages of simplicity in processing, convenience in use, high reliability and the like.
The invention further provides a rotor with the rotor punching sheet.
The invention also provides a motor with the rotor.
In order to achieve the above object, an embodiment according to a first aspect of the present invention provides a rotor punching sheet, including: the first fin is provided with a first inner end and a first outer end, the width of the first fin is gradually increased from the first inner end to the first outer end, and a first magnet groove is formed in the first fin; the second fin, the second fin has second inner and second outer end, the width of second fin is by second inner to second outer end crescent, first inner with the second inner links to each other just first outer end with the second outer end is spaced apart from each other, first fin with second fin axial symmetry, be equipped with the second magnet groove on the second fin, first magnet groove with the length direction in second magnet groove is along the syntropy orientation, first magnet groove with second magnet groove axial symmetry and symmetry axis with first fin with the symmetry axis coincidence of second fin.
The rotor punching sheet provided by the embodiment of the invention has the advantages of simplicity in processing, convenience in use, high reliability and the like.
In addition, the rotor sheet according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the invention, the rotor punching sheet further comprises a connecting rib, the first inner end and the second inner end are connected through the connecting rib, and a symmetry axis of the first fin and the second fin passes through the center of the connecting rib.
According to one embodiment of the present invention, the connecting rib, the first fin and the second fin are integrally stamped from the same plate material.
According to one embodiment of the present invention, the outer edge of the connecting rib is an inwardly concave major arc shape and the inner edge is a straight line shape.
According to one embodiment of the present invention, the outer edge of the connecting rib is an inwardly concave major arc shape and the inner edge is an inwardly convex minor arc shape.
According to one embodiment of the invention, the centers of the inner edge and the outer edge are located on the symmetry axes of the first fin and the second fin.
According to one embodiment of the invention, the radius of the inner rim is larger than the radius of the outer rim.
According to one embodiment of the invention, the first inner end is provided with a first avoidance groove, the second inner end is provided with a second avoidance groove, and the connecting rib is respectively connected with the groove bottom of the first avoidance groove and the groove bottom of the second avoidance groove.
According to one embodiment of the present invention, the first magnet slot includes a first inner slot and a first outer slot, the second magnet slot includes a second inner slot and a second outer slot, the length directions of the first inner slot and the second inner slot are oriented in the same direction, the first inner slot and the second inner slot are axisymmetrical and the symmetry axis coincides with the symmetry axis of the first fin and the second fin, the length directions of the first outer slot and the second outer slot are oriented in the same direction, the first outer slot and the second outer slot are axisymmetrical and the symmetry axis coincides with the symmetry axis of the first fin and the second fin.
According to one embodiment of the invention, the first inner groove is closer to the first inner end than the first outer groove, the first inner groove and the first outer groove are parallel in longitudinal direction, the first inner groove has a larger cross-sectional area than the first outer groove, the second inner groove is closer to the second inner end than the second outer groove, the second inner groove and the second outer groove are parallel in longitudinal direction, and the second inner groove has a larger cross-sectional area than the second outer groove.
According to one embodiment of the invention, the first fins are generally fan-shaped and the second fins are generally fan-shaped.
According to an embodiment of the present invention, the first fin has a first radial edge and a second radial edge extending in the radial direction, the second fin has a third radial edge and a fourth radial edge extending in the radial direction, the second radial edge is closer to the second fin than the first radial edge, the third radial edge is closer to the first fin than the fourth radial edge, the first radial edge, the second radial edge, the third radial edge and the fourth radial edge are all provided with injection molding grooves, a distance between the injection molding groove of the first radial edge and the first inner end is equal to a distance between the injection molding groove of the fourth radial edge and the second inner end, and a distance between the injection molding groove of the second radial edge and the first inner end is equal to a distance between the injection molding groove of the third radial edge and the second inner end.
According to one embodiment of the invention, the outer end of the second radial edge and the outer end of the third radial edge are provided with welding grooves.
According to one embodiment of the invention, the injection molding groove is a dovetail groove or a semicircular groove.
According to an embodiment of the present invention, the injection molding groove of the first radial side is axisymmetric to the injection molding groove of the fourth radial side and the symmetry axis coincides with the symmetry axis of the first fin and the second fin, and the injection molding groove of the second radial side is axisymmetric to the injection molding groove of the third radial side and the symmetry axis coincides with the symmetry axis of the first fin and the second fin.
According to an embodiment of the invention, one of the first radial side and the fourth radial side is provided with a splicing groove, and the other is provided with a splicing bulge, the splicing groove is a dovetail groove, and the splicing bulge is matched with the splicing groove in shape.
According to an embodiment of the second aspect of the present invention, a rotor is provided, where the rotor includes a plurality of stacked laminations, each of the laminations includes a plurality of stamped sheets arranged in a closed loop along a circumferential direction, the stamped sheets are formed by bending the rotor stamped sheets of the embodiment of the first aspect, and after the bent sheets are bent, the first outer end is connected with the second outer end.
According to the rotor provided by the embodiment of the invention, the rotor sheet provided by the embodiment of the first aspect of the invention has the advantages of simplicity in processing, convenience in use, high reliability and the like.
Embodiments according to a third aspect of the invention propose an electrical machine comprising a rotor according to embodiments of the second aspect of the invention.
The motor according to the embodiment of the invention has the advantages of simple processing, convenient use, high reliability and the like by utilizing the rotor according to the embodiment of the second aspect of the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a rotor sheet according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a rotor sheet according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a rotor sheet according to an embodiment of the invention.
Fig. 4 is an enlarged view at D in fig. 3.
Fig. 5 is a schematic structural diagram of a rotor sheet according to an embodiment of the invention.
Fig. 6 is a schematic structural diagram of a rotor sheet according to an embodiment of the invention.
Fig. 7 is a schematic structural diagram of a rotor sheet according to an embodiment of the invention.
Reference numerals: the rotor punching sheet 1, the first fin 100, the first inner end 110, the first avoiding groove 111, the first outer end 120, the first magnet groove 130, the first inner groove 131, the first outer groove 132, the first radial edge 140, the splicing groove 141, the second radial edge 150, the welding groove 160, the second fin 200, the second inner end 210, the second avoiding groove 211, the second outer end 220, the second magnet groove 230, the second inner groove 231, the second outer groove 232, the third radial edge 240, the fourth radial edge 250, the splicing protrusion 251, the injection molding groove 260, the connecting rib 300, the outer edge 310 and the inner edge 320.
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 or similar 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A rotor punching sheet 1 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 7, a rotor sheet 1 according to an embodiment of the present invention includes a first fin 100 and a second fin 200.
The first fin 100 has a first inner end 110 and a first outer end 120, the width of the first fin 100 gradually increases from the first inner end 110 to the first outer end 120, and the first fin 100 is provided with a first magnet groove 130. The second fin 200 has a second inner end 210 and a second outer end 220, the width of the second fin 200 gradually increases from the second inner end 210 to the second outer end 220, the first inner end 110 is connected with the second inner end 210, the first outer end 120 is spaced from the second outer end 220, the first fin 100 is axially symmetrical to the second fin 200, the second fin 200 is provided with a second magnet groove 230, the length directions of the first magnet groove 130 and the second magnet groove 230 are oriented in the same direction, the first magnet groove 130 and the second magnet groove 230 are axially symmetrical, and the symmetry axis coincides with the symmetry axis of the first fin 100 and the second fin 200.
A process of manufacturing a rotor according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
Firstly, the rotor sheet 1 is processed and manufactured, a plurality of rotor sheets 1 are stacked together, magnets are respectively assembled in a first magnet groove 130 and a second magnet groove 230 of the stacked rotor sheets 1, then the rotor sheets 1 are magnetized, then the first fins 100 and the second fins 200 are bent and folded, the first fins 100 and the second fins 200 are spliced together, and then the plurality of rotor sheets 1 are arranged into a closed-loop structure along the circumferential direction.
According to the rotor punching sheet 1 of the embodiment of the invention, by arranging the first fins 100 and the second fins 200, the first fin 100 is provided with the first magnet groove 130, the second fin 200 is provided with the second magnet groove 230, this facilitates the installation of the magnets into the first and second magnet grooves 130 and 230, respectively, compared to the rotor punching sheet of the related art, the magnets may be firstly respectively installed in the first magnet groove 130 and the second magnet groove 230, and then the rotor sheets 1 are arranged in a closed-loop structure along the circumferential direction, therefore, a closed loop structure is formed by splicing, so that the design of tooling equipment for assembling the magnet into the rotor sheet 1 is facilitated, the accuracy and the reliability of magnet assembly can be improved, the condition of neglected loading of the magnet is avoided, the structural reliability and the stability of the rotor are convenient to improve, the magnetic performance of the rotor is convenient to improve, and the working performance of the rotor is convenient to improve.
In addition, by arranging the first fin 100 and the second fin 200 to be axisymmetric, the first magnet groove 130 and the second magnet groove 230 to be axisymmetric and the symmetry axis of the first fin 100 and the second fin 200 to be coincident with the symmetry axis of the first fin 100 and the symmetry axis of the second fin 200, the first inner end 110 and the second inner end 210 are connected and the first outer end 120 and the second outer end 220 are spaced from each other, so that after the rotor sheet 1 is filled with the magnet, the first fin 100 and the second fin 200 can be conveniently bent, the first fin 100 and the second fin 200 are spliced together, the position of the magnet groove of the V-shaped groove can be ensured after the rotor sheet 1 is bent and molded, the working efficiency and the power density of the rotor can be conveniently improved, and the applicability and the energy efficiency of the rotor can be conveniently improved.
In addition, through making the length direction of first magnet groove 130 and second magnet groove 230 orient along the equidirectional, can guarantee before rotor punching 1 bends the shaping that the direction of setting up of the magnet of putting into in first magnet groove 130 and second magnet groove 230 is the same and the polarity direction of the magnet is opposite on first fin 100 and the second fin 200, be convenient for magnetize the magnet in first magnet groove 130 and the second magnet groove 230, make the magnetization of magnet can fully saturate, be convenient for improve the magnetism of rotor punching 1, be convenient for carry out make full use of to rotor punching 1, be convenient for improve the material utilization of rotor punching 1. Meanwhile, the machining of the first and second magnet grooves 130 and 230 is facilitated, and the machining efficiency of the first and second magnet grooves 130 and 230 is further facilitated to be improved.
That is to say, through setting up rotor punching 1 in this application, not only can guarantee that the direction of magnet is the same and polarity is opposite before rotor punching 1 bends the shaping, make the magnetization of magnet can fully saturate, be convenient for improve the magnetism of rotor punching 1, can guarantee the magnet trench position in V type groove after rotor punching 1 bends the shaping in addition, be convenient for improve the work efficiency and the power density of rotor, be convenient for improve the suitability and the efficiency of rotor.
Therefore, the rotor sheet 1 according to the embodiment of the invention has the advantages of simple processing, convenient use, high reliability and the like.
A rotor punching sheet 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
In some embodiments of the present invention, as shown in fig. 1 to 7, a rotor sheet 1 according to an embodiment of the present invention includes a first fin 100 and a second fin 200.
Specifically, as shown in fig. 2 to 5, the rotor sheet 1 further includes a connecting rib 300, the first inner end 110 and the second inner end 210 are connected by the connecting rib 300, and the symmetry axes of the first fin 100 and the second fin 200 pass through the center of the connecting rib 300. Therefore, subsequent bending processing is performed on the first fins 100 and the second fins 200, and the rotor punching sheets 1 are further arranged in a closed-loop structure along the circumferential direction.
More specifically, the connecting rib 300, the first fin 100, and the second fin 200 are integrally stamped from the same plate material. Therefore, the structural strength and the rigidity of the rotor punching sheet 1 are improved, the structural stability of the rotor punching sheet 1 is further improved, the processing technology of the rotor punching sheet 1 is simplified, and the production efficiency of the rotor punching sheet 1 is further improved.
According to one embodiment of the present invention, the outer edge 310 of the tie-bar 300 is an inwardly concave major arc and the inner edge 320 is a straight line. Therefore, the connecting rib 300 can be conveniently bent, the first fin 100 and the second fin 200 can be conveniently folded together, and the rotor punching sheet 1 can be further conveniently subjected to subsequent processing.
According to another embodiment of the present invention, as shown in fig. 2 to 5, the outer edge 310 of the connecting rib 300 has a concave major arc shape and the inner edge 320 has a convex minor arc shape. Like this also be convenient for bend the processing to splice first fin 100 and second fin 200, further be convenient for arrange into closed loop structure with rotor punching 1 along circumference.
Specifically, the centers of the inner edge 320 and the outer edge 310 are located on the symmetry axes of the first fin 100 and the second fin 200. Therefore, the processing and forming of the connecting rib 300 are facilitated, the stress of the bent connecting rib 300 is more uniform, and the structural stability of the rotor punching sheet 1 is further improved.
Optionally, the radius of the inner rim 320 is greater than the radius of the outer rim 310. Therefore, the connecting rib 300 can be bent conveniently, the stress distribution of the bent connecting rib 300 can be more uniform, and the stress concentration is avoided.
Specifically, as shown in fig. 2 to 5, the first inner end 110 is provided with a first avoiding groove 111, the second inner end 210 is provided with a second avoiding groove 211, and the connecting rib 300 is connected to the groove bottom of the first avoiding groove 111 and the groove bottom of the second avoiding groove 211, respectively. Therefore, the interference between the connecting rib 300 and the installation shaft of the motor after the rotor punching sheet 1 is bent can be avoided, and the rotor can be conveniently and smoothly assembled on the installation shaft. Meanwhile, the stress of the bent rotor punching sheet 1 can be reduced, and the stress concentration is further avoided.
Alternatively, as shown in fig. 2 to 5, the first magnet slot 130 includes a first inner slot 131 and a first outer slot 132, and the second magnet slot 230 includes a second inner slot 231 and a second outer slot 232, the length directions of the first inner slot 131 and the second inner slot 231 are oriented in the same direction, the first inner slot 131 and the second inner slot 231 are axisymmetrical and the symmetry axis coincides with the symmetry axis of the first fin 100 and the second fin 200, the length directions of the first outer slot 132 and the second outer slot 232 are oriented in the same direction, and the first outer slot 132 and the second outer slot 232 are axisymmetrical and the symmetry axis coincides with the symmetry axis of the first fin 100 and the second fin 200. Therefore, more magnets can be arranged on the rotor punching sheet 1, the magnetizing effect of the rotor punching sheet 1 is convenient to improve, and the working performance of the rotor is further convenient to improve.
Further, the first inner groove 131 is closer to the first inner end 110 than the first outer groove 132, the first inner groove 131 and the first outer groove 132 are parallel in the longitudinal direction, the cross-sectional area of the first inner groove 131 is larger than the cross-sectional area of the first outer groove 132, the second inner groove 231 is closer to the second inner end 210 than the second outer groove 132, the second inner groove 231 and the second outer groove 232 are parallel in the longitudinal direction, and the cross-sectional area of the second inner groove 231 is larger than the cross-sectional area of the second outer groove 232. This facilitates the assembly of magnets of different sizes in the first magnet groove 130 and the second magnet groove 230, facilitates the improvement of flexibility of magnet arrangement, and further facilitates the improvement of the magnetizing effect of the rotor sheet 1.
Specifically, the first fins 100 are generally fan-shaped and the second fins 200 are generally fan-shaped. Therefore, the rotor sheets 1 are arranged in a closed-loop structure along the circumferential direction, and the processing and manufacturing of the rotor are further facilitated.
More specifically, as shown in fig. 2-5, the first fin 100 has a first radial edge 140 and a second radial edge 150 extending in the radial direction, the second fin 200 has a third radial edge 240 and a fourth radial edge 250 extending in the radial direction, the second radial edge 150 is closer to the second fin 200 than the first radial edge 140, the third radial edge 240 is closer to the first fin 100 than the fourth radial edge 250, the first radial edge 140, the second radial edge 150, the third radial edge 240 and the fourth radial edge 250 are all provided with injection molding grooves 260, the injection molding grooves 260 of the first radial edge 140 are located at a distance from the first inner end 110 equal to the injection molding grooves 260 of the fourth radial edge 250 and from the second inner end 210, and the injection molding grooves 260 of the second radial edge 150 are located at a distance from the first inner end 110 equal to the injection molding grooves 260 of the third radial edge 240 and from the second inner end 210. Therefore, the injection molding grooves 260 on the second radial edge 150 and the third radial edge 240 can be used for injection molding connection of the first fin 100 and the second fin 200, and the injection molding grooves 260 on the first radial edge 140 and the fourth radial edge 250 are used for injection molding connection of adjacent rotor sheets 1, so that the plurality of rotor sheets 1 are further arranged in a closed-loop structure along the circumferential direction, the mechanical strength and the structural stability of the closed-loop structure are improved, and the structural reliability of the rotor is improved.
Specifically, the outer end of the second radial edge 150 and the outer end of the third radial edge 240 are provided with weld grooves 160. Specifically, the filling height during welding is not greater than the depth of the welding groove 160 in the axial direction of the rotor sheet 1. After the rotor punching sheet 1 is bent and spliced, the welding groove 160 can be used for welding and connecting the first fin 100 and the second fin 200, the magnetic pole directions of the first fin 100 and the second fin 200 are consistent, the repulsive force between the first fin 100 and the second fin 200 is large, and the first fin 100 and the second fin 200 are subjected to welding treatment, so that the splicing reliability of the first fin 100 and the second fin 200 is improved, and the structural stability and the reliability of the rotor punching sheet 1 are further improved.
Further, the injection groove 260 is a dovetail groove or a semicircular groove. Therefore, the processing and forming of the injection molding groove 260 are facilitated, and the structural strength and the reliability of the injection molding connecting structure in the injection molding groove 260 are improved.
Specifically, the position and shape of the injection molding groove 260 are appropriately selected according to the electromagnetic design requirements of the motor, for example, designed and manufactured according to the reduction of specific harmonics.
Alternatively, the injection molded groove 260 of the first radial edge 140 is axisymmetric to the injection molded groove 260 of the fourth radial edge 250 and the symmetry axis coincides with the symmetry axis of the first and second fins 100 and 200, and the injection molded groove 260 of the second radial edge 150 is axisymmetric to the injection molded groove 260 of the third radial edge 240 and the symmetry axis coincides with the symmetry axis of the first and second fins 100 and 200. Therefore, the stress uniformity of the injection molding connecting structure in the injection molding groove 260 is improved, the region with concentrated stress is avoided, the structural reliability and stability of the injection molding connecting structure are improved, the stress uniformity of the rotor is improved, and the working reliability and stability of the rotor are improved.
Specifically, as shown in fig. 2 to 5, a splicing groove 141 is provided on one of the first radial edge 140 and the fourth radial edge 250, and a splicing protrusion 251 is provided on the other, the splicing groove 141 is a dovetail groove, and the splicing protrusion 251 is adapted to the shape of the splicing groove 141. Therefore, the adjacent rotor sheets 1 can be positioned by the splicing grooves 141 and the splicing protrusions 251, so that the rotor can be machined and formed conveniently, the machining efficiency of the rotor is further improved, and the structural accuracy and reliability of the rotor are guaranteed conveniently.
More specifically, the size and the arrangement position of the splicing groove 141 are selected according to the strength requirement of the rotor sheet 1.
The following describes in detail a process of manufacturing a rotor according to an embodiment of the present invention with reference to the accompanying drawings.
Firstly, the rotor punching sheet 1 is manufactured by punching, a plurality of rotor punching sheets 1 are overlapped together, magnets are respectively assembled in a first magnet groove 130 and a second magnet groove 230 of the overlapped rotor punching sheets 1, the rotor punching sheets 1 are magnetized, then a first fin 100 and a second fin 200 are bent and folded, the first fin 100 and the second fin 200 are welded together, then the plurality of rotor punching sheets 1 are arranged into a closed-loop structure along the circumferential direction, and the injection molding groove 260 is filled and injected with plastic.
A rotor according to an embodiment of the present invention is described below. The rotor comprises a plurality of superposed laminations, each lamination comprises a plurality of punching sheets which are circumferentially arranged into a closed loop, each punching sheet is formed by bending the rotor punching sheet 1 according to the embodiment of the invention, and the first outer end is connected with the second outer end after the punching sheet is bent.
According to the rotor provided by the embodiment of the invention, the rotor sheet 1 provided by the embodiment of the invention has the advantages of simple processing, convenience in use, high reliability and the like.
A motor according to an embodiment of the present invention is described below. A motor according to an embodiment of the present invention includes a rotor according to the above-described embodiment of the present invention.
According to the motor provided by the embodiment of the invention, the rotor provided by the embodiment of the invention has the advantages of simple processing, convenience in use, high reliability and the like.
Other constructions and operations of rotors according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (18)
1. A rotor punching sheet is characterized by comprising:
the first fin is provided with a first inner end and a first outer end, the width of the first fin is gradually increased from the first inner end to the first outer end, and a first magnet groove is formed in the first fin;
the second fin, the second fin has second inner and second outer end, the width of second fin is by second inner to second outer end crescent, first inner with the second inner links to each other just first outer end with the second outer end is spaced apart from each other, first fin with second fin axial symmetry, be equipped with the second magnet groove on the second fin, first magnet groove with the length direction in second magnet groove is along the syntropy orientation, first magnet groove with second magnet groove axial symmetry and symmetry axis with first fin with the symmetry axis coincidence of second fin.
2. The rotor sheet according to claim 1, further comprising a connecting rib, wherein the first inner end and the second inner end are connected through the connecting rib, and a symmetry axis of the first fin and the second fin passes through a center of the connecting rib.
3. The rotor sheet as recited in claim 2, wherein the connecting rib, the first fin and the second fin are integrally stamped from the same plate.
4. The rotor sheet according to claim 2, wherein the outer edge of the connecting rib is an inwardly concave major arc shape and the inner edge is a straight line shape.
5. The rotor sheet according to claim 2, wherein the outer edge of the connecting rib is an inward concave major arc shape and the inner edge is an inward convex minor arc shape.
6. The rotor sheet as recited in claim 5, wherein the centers of the circles of the inner edge and the outer edge are located on the symmetry axes of the first fin and the second fin.
7. The rotor sheet as recited in claim 5, wherein the radius of the inner rim is greater than the radius of the outer rim.
8. The rotor sheet according to claim 2, wherein the first inner end is provided with a first avoidance groove, the second inner end is provided with a second avoidance groove, and the connecting rib is connected with the groove bottom of the first avoidance groove and the groove bottom of the second avoidance groove respectively.
9. The rotor sheet as recited in claim 1, wherein the first magnet slots include a first inner slot and a first outer slot, the second magnet slots include a second inner slot and a second outer slot, the length directions of the first inner slot and the second inner slot are oriented in the same direction, the first inner slot and the second inner slot are axisymmetric and have an axis of symmetry coinciding with the axes of symmetry of the first fin and the second fin, the length directions of the first outer slot and the second outer slot are oriented in the same direction, and the first outer slot and the second outer slot are axisymmetric and have an axis of symmetry coinciding with the axes of symmetry of the first fin and the second fin.
10. The rotor sheet as recited in claim 9, wherein the first inner slot is closer to the first inner end than the first outer slot, the first inner slot and the first outer slot are parallel in length, the first inner slot has a cross-sectional area greater than a cross-sectional area of the first outer slot, the second inner slot is closer to the second inner end than the second outer slot, the second inner slot and the second outer slot are parallel in length, and the second inner slot has a cross-sectional area greater than a cross-sectional area of the second outer slot.
11. The rotor lamination as recited in claim 1, wherein the first fins are generally fan-shaped and the second fins are generally fan-shaped.
12. The rotor sheet according to claim 11, wherein the first fin has a first radial edge and a second radial edge extending in the radial direction, the second fin has a third radial edge and a fourth radial edge extending in the radial direction, the second radial edge is closer to the second fin than the first radial edge, the third radial edge is closer to the first fin than the fourth radial edge, the first radial edge, the second radial edge, the third radial edge and the fourth radial edge are all provided with injection molding grooves, the distance between the injection molding groove of the first radial edge and the first inner end is equal to the distance between the injection molding groove of the fourth radial edge and the second inner end, and the distance between the injection molding groove of the second radial edge and the first inner end is equal to the distance between the injection molding groove of the third radial edge and the second inner end.
13. The rotor sheet as recited in claim 12, wherein an outer end of the second radial edge and an outer end of the third radial edge are provided with weld grooves.
14. The rotor sheet as recited in claim 12, wherein the injection molded slot is a dovetail slot or a semi-circular slot.
15. The rotor sheet according to claim 12, wherein the injection molding groove of the first radial edge is axisymmetric with the injection molding groove of the fourth radial edge, and the symmetry axis coincides with the symmetry axis of the first fin and the second fin, and the injection molding groove of the second radial edge is axisymmetric with the injection molding groove of the third radial edge, and the symmetry axis coincides with the symmetry axis of the first fin and the second fin.
16. The rotor sheet according to claim 12, wherein one of the first radial side and the fourth radial side is provided with a splicing groove and the other is provided with a splicing protrusion, the splicing groove is a dovetail groove, and the splicing protrusion is matched with the splicing groove in shape.
17. A rotor comprising a plurality of stacked laminations, each lamination comprising a plurality of laminations arranged circumferentially in a closed loop, the laminations being formed by bending a rotor lamination according to any one of claims 1 to 16, the first outer end being connected to the second outer end after bending.
18. An electrical machine comprising a rotor according to claim 17.
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| CN201811141312.9A CN110971029B (en) | 2018-09-28 | 2018-09-28 | Rotor punching sheet, rotor and motor |
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| CN201811141312.9A CN110971029B (en) | 2018-09-28 | 2018-09-28 | Rotor punching sheet, rotor and motor |
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| CN110971029B true CN110971029B (en) | 2022-03-01 |
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| CN110971029A (en) | 2020-04-07 |
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