CN213461287U - Rotor subassembly, series excitation gear motor and food processor - Google Patents

Abstract

The present disclosure relates to a rotor assembly for a food processor, including a rotor core, an armature winding and an insulating member, the armature winding being wound on the rotor core, the insulating member being disposed at both ends of the rotor core, the rotor core being formed by sequentially axially laminating a plurality of rotor laminations, the rotor laminations including a rotor lamination yoke and a plurality of rotor lamination teeth, the plurality of rotor lamination teeth being spaced apart from each other along a circumferential direction of the rotor lamination yoke and extending radially outward from the rotor lamination yoke; the rotor punching sheet tooth part is provided with protruding structures extending towards two sides of the rotor punching sheet tooth part at the outer circumference position, a radial included angle beta is formed between two opposite edges of the protruding structures adjacent to each other, and the angle range of the radial included angle beta is between 10 degrees and 30 degrees. The present disclosure also relates to a series-wound geared motor including the rotor assembly. The present disclosure further relates to a food processor comprising the rotor assembly.

Description

Rotor subassembly, series excitation gear motor and food processor

Technical Field

The present disclosure relates to a rotor assembly and a series-excited reduction motor including the same. The present disclosure also relates to a food processor including the rotor assembly.

Background

Although the process of the series motor for the food processor in the prior art is mature, in production, because the enameled wire of the rotor of the series motor is thick, and the notch of the punching sheet is narrow, particularly in the process of winding the rotor by using automatic equipment, when the enameled wire slides into the punching sheet groove, the enameled wire is easy to directly contact with a protruding structure at the end part of the notch of the punching sheet, so that the surface of the enameled wire is scratched, and the defect that the winding is cut off or the turn-to-turn short circuit of the winding exists. In actual production, the rotor winding with poor turn-to-turn performance cannot be effectively detected and found, the poor turn-to-turn performance can be found only when the motor is used for a long time, and the service life of the motor is greatly shortened. In addition, when the enameled wire slides into the punching sheet groove, the insulating component on the end face of the rotor punching sheet is impacted by external force due to the influence of winding tension, so that the deviation is easy to occur, meanwhile, because the insulating parts are generally made of phenolic resin, the toughness of the materials is insufficient, and a certain proportion of fracture often occurs, so that the enameled wires are contacted with the rotor punching sheets, or the creepage distance is too small, which causes the poor insulation and pressure resistance of the rotor, and the problem is generally only after all the procedures of winding the rotor assembly and the like are finished, the withstand voltage test of the rotor assembly is not detected, so that the whole rotor assembly is scrapped, great economic loss is caused, for the rotor punching sheet with more grooves and smaller tooth width, the extending structure of the end part of the insulating part is narrower, so that the rotor punching sheet is impacted by the tension of the enameled wire, the risk of deviation or breakage is higher, the problem rate is higher, and the quality loss is higher.

Fig. 1 is a rotor sheet structure used in the prior art, which is mainly used to support an enameled wire and form a part of a magnetic circuit of a motor. It can be clearly seen from fig. 1 that the outer circumferential position of the tooth part of the rotor punching sheet contains the protruding structures extending to both sides, the prior art of the protruding structures of the adjacent tooth parts are parallel, namely, the included angle is 0 °, when the rotor assembly is mechanically wound, the enameled wire slides into the punching sheet groove, when passing through the punching sheet groove, because the groove is narrow, the distance between the enameled wire and the protruding structure of the end part of the punching sheet groove is close, the enameled wire is easy to be in direct contact with the protruding structure of the end part of the punching sheet groove, and the surface scratch is caused, and then the defect that the winding is cut off or the turn-to-turn short circuit of the winding exists, and the reliability.

Fig. 2 is an insulating component structure used in the prior art, which is mainly used to protect the rotor assembly from forming a sufficient creepage distance at the end of the rotor sheet when the rotor assembly is wound, and meanwhile, the cooperating slot insulation forms effective insulation between the enameled wire and the sheet.

Fig. 3 and 4 are a perspective view and a top view of an insulation component and a rotor sheet after being assembled in the prior art.

As can be clearly seen from fig. 3 and 4, the end of the insulating component at the end face of the rotor punching has an extending structure, when the rotor assembly is mechanically wound, as shown in the above figure, the extending structure of the insulating component is under the action of the winding tension F of the enameled wire, and the tension F has a component force Fx in the vertical direction of the extending structure of the insulating component.

SUMMERY OF THE UTILITY MODEL

The technical problem that this disclosure will solve is: in the prior art, during the winding process of a motor rotor, an enameled wire is in direct contact with a motor punching sheet, so that the enameled wire is scratched. Meanwhile, the end face of the rotor punching sheet is not limited by a positioning structure and is influenced by winding tension, so that an insulating part on the end face of the rotor punching sheet is deviated or broken, an enameled wire is contacted with the rotor punching sheet or the creepage distance is too small, and the rotor is poor in insulation and voltage resistance.

In order to solve one or more of the above-mentioned drawbacks of the prior art, according to one aspect of the present disclosure, a rotor assembly for a food processor is provided, the rotor assembly including a rotor core, armature windings wound on the rotor core, and insulating members disposed at both ends of the rotor core, the rotor core being formed by sequentially axially laminating a plurality of rotor sheets.

The rotor punching comprises a rotor punching yoke portion and a plurality of rotor punching tooth portions, and the rotor punching tooth portions are spaced from each other along the circumferential direction of the rotor punching yoke portion and extend outwards in the radial direction of the rotor punching yoke portion.

The rotor punching sheet comprises a rotor punching sheet tooth part and a rotor punching sheet tooth part, wherein the outer circumference of the rotor punching sheet tooth part is provided with protruding structures extending towards two sides of the rotor punching sheet tooth part, a radial included angle beta is formed between two opposite edges of the protruding structures adjacent to each other, and the angle range of the radial included angle beta is between 10 degrees and 30 degrees.

According to the above aspect of the present disclosure, the opening of the radial included angle β is directed toward the rotor lamination yoke portion.

According to the above aspects of the present disclosure, the insulating member includes an insulating member body, a protruding structure, and a burring structure.

The plurality of projecting structures are spaced apart from each other along a circumferential direction of the insulating member body and extend radially outward from the insulating member body.

The flanging structure is arranged on the edge of the outer contour of the extending structure and is arranged along the lower part of the plane which is vertical to the extending structure.

According to the above aspects of the present disclosure, the flange structure includes an end groove, and a bottom of the end groove coincides with a bottom of the protruding structure of the insulating member.

The size of the inner cavity of the end groove is offset outwards by a distance H relative to the outer contour of the tooth part of the rotor punching sheet, and the distance H is 0.1mm to 0.2 mm.

According to the above aspects of the disclosure, the top of the flanging structure, which is located at the inner side of the end groove, is uniformly and symmetrically provided with inner side chamfers.

According to the above aspects of the disclosure, the top of the flanging structure located outside the end groove is uniformly and symmetrically provided with external chamfers M along the axial direction of the insulating component.

According to the above aspects of the disclosure, the height K of the end of the flanging structure is at least the sum of the total thicknesses of the two rotor sheets.

According to the above aspects of the present disclosure, the insulating member includes a reinforcing structure.

The reinforcing structure is arranged on the circumferential edge of the insulating part body and is arranged along the upper part of the plane where the extending structure perpendicular to the insulating part body is located.

According to the above aspects of the present disclosure, the end height F of the reinforcing structure is 0.5 to 0.8 times the thickness L of the protruding structure.

According to the above aspects of the present disclosure, the end portions of the reinforcing structure are provided with chamfers at both sides, and the angle of the chamfers is 30 ° to 60 °.

According to the above aspects of the present disclosure, the rotor assembly further includes a motor shaft and a commutator.

The rotor punching sheet is provided with a center hole, and the rotor core is in interference fit with the carved rib on the motor shaft through the center hole.

The insulating part is arranged at the position of a rib on the motor shaft through a central hole with a boss section.

The commutator is mounted to one end of the motor shaft at a ribbed location through its central bore with a metal bushing.

According to the above aspects of the present disclosure, the rotor core is provided with a plurality of winding grooves, the rotor lamination teeth are formed between the winding grooves adjacent to each other, and the armature windings are wound on the rotor lamination teeth.

And a groove insulating part is paved on the inner wall surface of the embedded groove.

And a slot wedge is arranged at the notch of the line embedding slot, and gaps among the enameled wires forming the armature winding are filled with insulating paint.

The slot wedge closes the opening of the slot insulator.

According to the above aspects of the present disclosure, a straight knurling is provided on one end of the motor shaft.

According to the above aspects of the present disclosure, the output end of the motor shaft has an outer hexagonal structure.

According to another aspect of the present disclosure, there is provided a series-wound geared motor including a rotor assembly as described above.

According to yet another aspect of the present disclosure, there is provided a food processor comprising a rotor assembly as described above.

The novel rotor punching structure effectively overcomes the technical defect that an enameled wire is scratched when an automatic device winds the wire in the prior art, can be manufactured by adopting a high-speed punching progressive die and is convenient to realize automatic mass production. When the enameled wire slides into the punching sheet groove, the distance between the enameled wire and the protruding structure at the end part of the tooth part notch of the rotor punching sheet during the winding of the automatic equipment is effectively increased, so that the contact probability of the enameled wire and the punching sheet is reduced, the surface scratch of the enameled wire is effectively avoided, the defect of turn-to-turn short circuit of the winding is effectively avoided, and the reliability and the service life of the motor are greatly improved.

Meanwhile, the present disclosure effectively solves the problem in the prior art that the end portion of the rotor core has no positioning structure. By the aid of the insulating part, the tooth part of the rotor punching sheet is arranged in the end groove of the flanging structure, and the end face of the insulating part on the rotor core is positioned. When the rotor subassembly carries out mechanized wire winding, insulating part receives the effect of wire winding tension, corresponding rotor dashes the piece and can give a reaction force of insulating part, two power can realize balancedly, rotor core tip does not have the location among the prior art has effectively been solved, insulating part receives wire winding tension to strike and takes place skew or cracked problem, and solved enameled wire and rotor core contact or creepage distance undersize, the withstand voltage bad problem of rotor insulation, the qualification rate of rotor subassembly has been improved, quality loss has been avoided, and then the reliability and the life of improvement motor. Meanwhile, the upper part of the extending structure of the insulating part is provided with the reinforcing structure, so that the strength of the extending structure of the insulating part is increased, the occurrence probability of breakage of the extending structure of the insulating part is reduced, and the quality loss is reduced.

So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.

As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.

Drawings

The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.

FIG. 1 illustrates a rotor lamination configuration used in the prior art;

FIG. 2 shows an insulating member used in the prior art;

FIG. 3 illustrates a perspective view of a prior art insulation component assembled with a rotor sheet;

FIG. 4 illustrates a top view of a prior art insulation component assembled with a rotor sheet;

FIG. 5 illustrates a schematic structural view of a rotor assembly according to the present disclosure;

FIG. 6 illustrates a top view of an insulation component assembled with a rotor sheet according to the present disclosure;

FIG. 7 shows an enlarged view of portion I of FIG. 6;

FIG. 8 illustrates a schematic structural view of a rotor lamination according to the present disclosure;

fig. 9 and 10 show perspective structural views of an insulating member according to the present disclosure;

FIG. 11 shows a top view of an insulating member according to the present disclosure;

FIG. 12 shows a cross-sectional view along line E-E in FIG. 11;

fig. 13 shows an enlarged view of part II in fig. 12;

FIG. 14 illustrates a side view of an insulating member according to the present disclosure;

fig. 15 shows an enlarged view of part III in fig. 14;

FIG. 16 illustrates a perspective view of an assembled rotor sheet with an insulation component according to the present disclosure;

FIG. 17 illustrates a top view of an insulation component assembled with a rotor sheet according to the present disclosure;

fig. 18 shows a sectional view along line G-G in fig. 17;

fig. 19 shows an enlarged view of a portion IV in fig. 18;

fig. 20 shows an overall structural schematic diagram of a series-wound speed reduction motor according to the present disclosure;

fig. 21 shows an exploded schematic view of a series-wound gearmotor according to the present disclosure.

Detailed Description

Specific embodiments according to the present disclosure are described in detail below with reference to the accompanying drawings.

Fig. 5 shows a schematic structural diagram of a rotor assembly 3 according to an embodiment of the present disclosure, which is used in the series deceleration motor shown in fig. 20 and 21, wherein fig. 20 shows an overall structural diagram of the series deceleration motor according to the present disclosure. Fig. 21 shows an exploded schematic view of a series-wound gearmotor according to the present disclosure.

In fig. 20 and 21, the series-wound speed reduction motor includes: the wind-guiding structure comprises a front support assembly 1, a stator assembly 2, a rotor assembly 3, a rear support assembly 4, a wind scooper 5, a centrifugal fan blade 6, a wind cover 7, a planetary reduction gearbox assembly 8 and an elastic component 9. The rotor assembly 3 is assembled with the front carrier assembly 1, the rear carrier assembly 4 and the stator assembly 2 through bearings. The stator core 21 of the stator assembly 2 is fixed between the front bracket assembly 1 and the rear bracket assembly 4. The centrifugal fan blade 6 is assembled with a motor shaft 31 on the rotor assembly 3. The upper end of the motor shaft 31 is provided with a straight knurling 311, and the centrifugal fan blade 6 is in interference fit with the straight knurling 311 through special tooling crimping, so that a certain amount of torque can be borne.

According to the above-described embodiment of the present disclosure, as shown in fig. 5, the rotor assembly 3 includes the rotor core 34, the armature windings 33, and the insulating member 35. The armature winding 33 is wound on the rotor core 34, the insulating members 35 are disposed at both ends of the rotor core 34, and the rotor core 34 is formed by sequentially and axially laminating a plurality of rotor sheets 341 (see fig. 16).

As shown in fig. 8, the rotor segment 341 includes a rotor segment yoke 3415 and a plurality of rotor segment teeth 3411.

A plurality of the rotor lamination teeth 3411 are spaced apart from each other in the circumferential direction of the rotor lamination yoke 3415 and extend radially outward from the rotor lamination yoke 3415.

At the outer circumferential position of the rotor punching tooth 3411, there is a protruding structure 3412 extending to both sides thereof.

The two mutually opposite edges of the protruding structures 3412 adjacent to each other have a radial included angle β therebetween, and the angle of the radial included angle β is in a range from 10 ° to 30 °. Whereas the angle described above in the prior art is 0. After the improvement of the technical scheme of the disclosure, in the process of mechanically winding the rotor assembly, when the enameled wire slides into the punching groove, the distance between the enameled wire and the protruding structure 3412 at the end part of the tooth notch of the rotor punching 341 can be effectively increased, the probability of contact between the enameled wire and the rotor punching is reduced, the surface scratch of the enameled wire is effectively avoided, the defect of turn-to-turn short circuit of the winding is further effectively avoided, and the reliability and the service life of the motor are greatly improved.

According to the above embodiment of the present disclosure, the opening of the radial included angle β is toward the rotor lamination yoke 3415.

According to the above-described various embodiments of the present disclosure, as shown in fig. 9 and 10, the insulating member 35 includes an insulating member body 351, a protruding structure 352, and a burring structure 353.

The plurality of protruding structures 352 are spaced apart from each other along the circumferential direction of the insulating member body 351 and extend radially outward from the insulating member body 351.

As shown in fig. 10, the flange 353 is disposed at the outer contour edge of the protruding structure 352 along the lower portion perpendicular to the plane of the protruding structure 352.

According to the above embodiments of the present disclosure, the flanging structure 353 includes the end groove 3531, and the bottom of the end groove 3531 coincides with the bottom of the protruding structure 352 of the insulating member 35.

As shown in fig. 17, 18 and 19, the inner cavity of the end groove 3531 is sized to be outwardly offset from the outer profile of the rotor punching tooth 3411 by a distance H of 0.1mm to 0.2 mm.

The end groove 3531 facilitates the installation of the tooth structures 3411 of the plurality of rotor laminations 341 at the two end surfaces of the rotor core 34 into the end groove 3531.

According to the above embodiments of the present disclosure, the top of the flanging structure 353 located inside the end groove 3531 is uniformly and symmetrically provided with inner chamfers 3532, as shown in fig. 13, so that when the insulating component 35 is pressed by a tool, the teeth 3411 of the rotor punching are inserted into the end groove 3531 along the flanging structure 353.

According to the above embodiments of the present disclosure, as shown in fig. 13, the top of the flanging structure 353 located outside the end groove 3531 is uniformly and symmetrically provided with an external chamfer M, preferably 1-3 °, along the axial direction of the insulating member 35, so as to facilitate the slot insulator 36 to enter from one end of the rotor core 34 to the other end along the outside of the flanging structure 353 when using the slot insulator 36 (as shown in fig. 7 and described below).

According to the above embodiments of the present disclosure, the height K of the end of the flanging structure 353 is at least the sum of the total thicknesses of the two rotor sheets 341, as shown in fig. 13.

According to the various embodiments of the present disclosure described above, as shown in fig. 10, the insulating member 35 includes a reinforcing structure 354.

The reinforcing structure 354 is disposed at a circumferential edge of the insulator body 351 along an upper portion of a plane perpendicular to the protruding structure 352 of the insulator body 351.

According to the various embodiments of the present disclosure described above, the height F of the end of the reinforcing structure 354 is 0.5 to 0.8 times the thickness L of the protruding structure 352, as shown in fig. 11-15.

According to the above embodiments of the present disclosure, the end of the reinforcing structure 354 is provided with chamfers 3541 at an angle of 30 ° to 60 ° on both sides, as shown in fig. 15.

The reinforcing structure 354 serves to increase the strength of the protruding structure 352, reduce the occurrence probability of breakage of the protruding structure 352, and thus reduce mass loss.

According to the above-described various embodiments of the present disclosure, as shown in fig. 5, the rotor assembly 3 further includes a motor shaft 31 and a commutator 32.

The rotor punching sheet 341 is provided with a central hole 3413 (as shown in fig. 8), and the rotor core 34 is in interference fit with a position (not shown) of a notch on the motor shaft 31 through the central hole 3413.

As shown in FIG. 9, the insulator member 35 is mounted to a knurled location (not shown) on the motor shaft 31 through its central bore 356 with boss section 355.

The commutator 32 is mounted to one end of a ribbed location (not shown) on the motor shaft (31) through its central bore (not shown) with a metal bushing (not shown).

According to the above embodiments of the present disclosure, as shown in fig. 6, the rotor core (34) is provided with a plurality of rule grooves 3414, the rotor punching teeth 3411 are formed between the rule grooves adjacent to each other, and the armature windings 33 are wound on the rotor punching teeth 3411.

As shown in fig. 7, a slot insulator 36 is laid on an inner wall surface of the caulking slot 3414, and is located between the caulking slot and the armature winding 33, thereby ensuring effective insulation between the armature winding 33 and the rotor core 34.

A slot wedge 37 is provided at a notch of the slot 3414, and a gap between the enamel wires constituting the armature winding 33 is filled with an insulating varnish.

The slot wedge 37 closes the opening of the slot insulator 36.

According to the above-described various embodiments of the present disclosure, as shown in fig. 5, a straight knurling 311 is provided on one end of the motor shaft 31. As shown in fig. 21, the centrifugal fan blade 6 can be in interference fit with the straight knurls 311 by crimping.

According to the above various embodiments of the present disclosure, as shown in fig. 5, the output end of the motor shaft 31 has an outer hexagonal structure 312.

According to another embodiment of the present disclosure, as shown in fig. 20 and 21, there is provided a series geared motor including the rotor assembly 3 as described above.

According to yet another embodiment of the present disclosure, there is provided a food processor (not shown) comprising a rotor assembly 3 as described above.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the embodiments.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of the various embodiments. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may depend directly on only one claim, the disclosure of various embodiments includes each dependent claim in combination with every other claim in the claim set.

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more". Further, as used herein, the article "the" is intended to include the incorporation of one or more items referenced by the article "the" and may be used interchangeably with "one or more". Further, as used herein, the term "set" is intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more". Where only one item is intended, the phrase "only one item" or similar language is used. In addition, as used herein, the term "having," variants thereof, and the like are intended to be open-ended terms. Further, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise. In addition, as used herein, the term "or" when used in series is intended to be inclusive and may be used interchangeably with "and/or" unless specifically stated otherwise (e.g., if used in conjunction with "or" only one of ").

Claims (16)

1. A rotor assembly for a food processor, the rotor assembly (3) comprising a rotor core (34), armature windings (33) and insulating members (35), the armature windings (33) being wound on the rotor core (34), the insulating members (35) being provided at both ends of the rotor core (34), the rotor core (34) being formed by sequentially axially laminating a plurality of rotor punching sheets (341), characterized in that,

the rotor lamination (341) includes a rotor lamination yoke (3415) and a plurality of rotor lamination teeth (3411), the plurality of rotor lamination teeth (3411) being spaced apart from each other along a circumferential direction of the rotor lamination yoke and extending radially outward from the rotor lamination yoke (3415);

the rotor punching sheet tooth part (3411) is provided with a protruding structure (3412) extending towards two sides of the rotor punching sheet tooth part at the outer circumferential position, a radial included angle beta is formed between two edges, opposite to each other, of the protruding structure (3412) adjacent to each other, and the angle range of the radial included angle beta is 10-30 degrees.

2. The rotor assembly of claim 1,

the opening of the radial included angle beta faces to the yoke part (3415) of the rotor punching sheet.

3. The rotor assembly of claim 1,

the insulating part (35) comprises an insulating part body (351), a protruding structure (352) and a flanging structure (353);

a plurality of the projecting structures (352) spaced apart from each other along a circumferential direction of the insulating member body (351) and extending radially outward from the insulating member body (351);

the flanging structure (353) is arranged at the outer contour edge of the protruding structure (352) and is along the lower part perpendicular to the plane of the protruding structure (352).

4. The rotor assembly of claim 3,

the flanging structure (353) comprises an end groove (3531), and the bottom of the end groove (3531) is overlapped with the bottom of the protruding structure (352) of the insulating part (35);

the size of an inner cavity of the end groove (3531) is offset outwards by a distance H relative to the outer contour of the tooth part of the rotor punching sheet, and the distance H is 0.1 mm-0.2 mm.

5. The rotor assembly of claim 4,

the top of the flanging structure (353) at the inner side of the end groove (3531) is uniformly and symmetrically provided with inner side chamfers (3532).

6. The rotor assembly of claim 4,

the top of the flanging structure (353) positioned outside the end groove (3531) is uniformly and symmetrically provided with external chamfers M along the axial direction of the insulating part (35).

7. The rotor assembly of claim 6,

the height K of the end part of the flanging structure (353) is at least the sum of the total thicknesses of the two rotor punching sheets (341).

8. The rotor assembly of claim 3,

the insulating member (35) comprises a reinforcing structure (354);

the reinforcing structure (354) is provided at a circumferential edge of the insulating member body (351) along an upper portion of a plane perpendicular to the protruding structure (352) of the insulating member body (351).

9. The rotor assembly of claim 8,

the end height F of the reinforcing structure (354) is 0.5 to 0.8 times the thickness L of the projecting structure (352).

10. The rotor assembly of claim 9,

chamfers (3541) are arranged on two sides of the end part of the reinforcing structure (354), and the angle of each chamfer is 30-60 degrees.

11. The rotor assembly of any one of claims 3 or 8,

the rotor assembly (3) further comprises a motor shaft (31) and a commutator (32);

the rotor punching sheet (341) is provided with a central hole, and the rotor core part (34) is in interference fit with a rib carving position on the motor shaft (31) through the central hole;

the insulating part (35) is arranged at the position of a rib on the motor shaft (31) through the center hole with the boss section (355);

the commutator (32) is mounted to one end of the motor shaft (31) at a ribbed position through its central hole with a metal bushing.

12. The rotor assembly of any one of claims 3 or 8,

the rotor core (34) is provided with a plurality of embedded slots, the rotor punching sheet tooth parts (3411) are formed between the embedded slots adjacent to each other, and the armature windings (33) are wound on the rotor punching sheet tooth parts (3411);

a groove insulator (36) is laid on the inner wall surface of the embedding groove;

a slot wedge (37) is arranged at the notch of the line embedding slot, and a gap between enameled wires forming the armature winding (33) is filled with insulating paint;

the slot wedge (37) closes the opening of the slot insulation (36).

13. The rotor assembly of claim 11,

one end of the motor shaft (31) is provided with straight knurls (311).

14. The rotor assembly of claim 13,

the output end of the motor shaft (31) has an outer hexagonal structure (312).

15. A series geared electrical machine, characterized in that it comprises a rotor assembly (3) according to one of claims 1 to 14.

16. A food processor characterized in that it comprises a rotor assembly (3) according to one of claims 1 to 14.

Images