CN217607586U - Motor rotor assembly - Google Patents

Abstract

The utility model provides an electric motor rotor subassembly belongs to mechanical technical field. It has solved prior art and has had the poor problem of stability. This motor rotor subassembly includes pivot and magnet, and above-mentioned magnet is cylindricly, still includes cylindric bush, and above-mentioned pivot middle part is worn to establish on the bush and both tight fit are connected, and above-mentioned bush is worn to establish in the magnet and has between the two and enables both firm connection's connection structure, the magnet tip still has can be to the radiating heat radiation structure of bearing. This motor rotor subassembly stability is high.

Description

Motor rotor assembly

Technical Field

The utility model belongs to the technical field of machinery, a motor rotor subassembly is related to.

Background

The known prior art motor rotor includes a rotor unit and a rotating shaft, the rotor unit is formed by integrally formed magnets, and a rotor system is formed by pressing the integrally formed magnets into the rotating shaft to be tightly fitted therewith.

As can be seen from the above-mentioned electric motor rotor system, the existing electric motor rotor system needs to solve the following problems: there is a need to control the press-in force of the magnets when pressed into the shaft, and to ensure the circumferential force that the magnets can withstand, and the extraction force, i.e. the axial force, that the magnets can withstand.

Currently, as a main method for controlling the above problems, there is a manufacturing method in which a magnet and a shaft are designed to be loosely fitted and then glue is used to fix the magnet and the shaft, but in this method, when the glue fails due to the influence of external factors, the fixation of the magnet and the shaft cannot be effectively and reliably ensured, and the glue needs a long time to completely cure, thereby increasing the man-hour for manufacturing the rotor.

In the other method, the magnet is directly fixed on the shaft through an injection molding process, but in the method, the magnetizing process of the magnet cannot be controlled ideally after molding, and the shaft integrally molded with the magnet is also influenced by the magnetizing process to cause magnetization, so that the parameters of the magnet, such as the magnetic property, and the like, are finally influenced.

Its publication No. CN112910128A of china patent discloses a motor rotor, has this motor rotor's motor and motor rotor's manufacturing method, including the motor, the side fixed mounting of motor has the stator, the one end surface of motor is equipped with the supporting shoe, the side of supporting shoe is rotated and is installed in there being the motor shaft, the surface mounting of motor shaft has the rotor, the other end fixed surface of motor has the apron, the one end surface rotation of motor shaft is connected in the side of apron, the rotor includes rotor core, rotor core's surperficial center department is equipped with the shaft hole, the side slip in shaft hole cup joints the surface in the motor shaft, rotor core's surface is equipped with the arc mounting groove, arc mounting groove side fixed mounting has the arc magnetic pole, a side surface of arc mounting groove is equipped with the location arch, the bellied surface top in location is tightly connected in a side surface of arc magnetic pole.

The utility model has the advantages of above-mentioned patent has improved convenience and stability that use, guarantees the high efficiency of installation and dismantlement.

However, it still has the problem that the connection between the iron core and the rotating shaft is inconvenient.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a convenient assembling and high motor rotor subassembly of stability.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a motor rotor subassembly, includes pivot and magnet, and above-mentioned magnet is cylindricly, its characterized in that still includes cylindric bush, and above-mentioned pivot is worn to establish on the bush and both firmly connect, and above-mentioned bush is worn to establish and is had the connection structure that enables both firm connections between the two at the magnet inboard, the magnet tip still has heat radiation structure.

The motor rotor assembly creatively enables the lining to be firmly connected with the magnet through the connecting structure, and finally the rotating shaft is stably and fixedly connected with the magnet as the rotating shaft is fixedly connected with the lining.

Meanwhile, after the motor rotor assembly is installed in the shell, a bearing is further connected to the rotating shaft and located between the shell and the magnet. Because heat radiation structure is close to the bearing, the quick air current that the magnet rotated the in-process and produced can also be to the bearing heat dissipation to improve motor rotor subassembly's stability.

In the above-described motor rotor assembly, the connecting structure includes knurling on the outer side of the bushing.

The annular knurl is the concave convex form and is located the bush outside, can effectively improve the frictional resistance between bush and the magnet under the effect of annular knurl, finally improves the stability of being connected of bush and magnet.

In the motor rotor assembly, the knurling is in a fishing net shape.

In foretell motor rotor subassembly, bush upper end and magnet upper end parallel and level, bush lower extreme and magnet lower extreme parallel and level, above-mentioned annular knurl circumference equipartition is in bush middle part outside department.

Because the tip of bush and magnet tip parallel and level, can effectively improve the compact structure nature of whole motor element like this.

Meanwhile, the knurls cannot be exposed outside, so that the structure compactness of the roller is improved, sundries are prevented from entering the knurls, and the stability of the roller is further improved.

In the motor rotor assembly, the heat dissipation structure comprises a plurality of blades protruding out of the end of the magnet, and the blades are circumferentially and uniformly distributed by taking the center of the magnet as a reference.

In the motor rotor assembly, the blades are in a strip shape and are integrated with the magnets.

The blades and the magnet are of an integrated structure, and in the rotating process of the magnet, the blades rotating together can enable the end part of the magnet to generate rapid airflow.

Because the blade is close to the bearing, the quick airflow can stably dissipate heat of the bearing.

In the above-mentioned motor rotor assembly, the inner port of the bushing has a smoothly transitional first guiding portion.

In the above-mentioned motor rotor assembly, the outer port of the bushing has a smoothly transitional second guiding portion.

In the above-mentioned motor rotor assembly, the end of the rotating shaft has a third smoothly transitional introduction part.

In the above-mentioned motor rotor assembly, the inner port of the magnet has a smoothly transitional leading-in part four.

The first leading-in part, the second leading-in part, the third leading-in part and the fourth leading-in part are all smooth transition fillets. Of course, the first, second, third and fourth introduction portions may be chamfered according to actual conditions.

The first introduction part has the following functions: the rotating shaft can be smoothly embedded into the bushing, and burrs at the inner port of the bushing are eliminated.

The second introduction part has the following functions: the bushing can be smoothly embedded into the magnet, and burrs at the outer port of the bushing are eliminated.

The third introduction part functions as follows: the rotating shaft can be smoothly inserted into the bush, and burrs at the end part of the rotating shaft are eliminated.

The fourth introduction part functions as follows: the bushing can be smoothly inserted into the magnet, and simultaneously, burrs at the inner port of the magnet are eliminated.

Compared with the prior art, this motor rotor subassembly creates the adoption connection structure of proper motion and makes bush and magnet stable linking firmly, because pivot and bush tight fit link firmly, consequently, finally enables pivot and magnet stable linking firmly, its stability is than higher.

Because the bush and the rotating shaft are fastened and connected in advance to form a semi-finished product, and the semi-finished product is connected with the magnet, the connection is more convenient.

Meanwhile, after the motor rotor assembly is connected in the corresponding shell, the heat dissipation structure on the magnet is adjacent to the bearing, so that the bearing can be further dissipated through the rotating magnet in the running process of the motor, the stability of the motor is further improved, and the motor rotor assembly has high practical value.

Drawings

Fig. 1 is a perspective view of the rotor assembly of the motor.

Fig. 2 is a schematic cross-sectional view of the rotor assembly of the present motor.

Fig. 3 is a perspective view of the rotor assembly of the motor at the position of a bushing.

In the figure, 1, a rotating shaft; 2. a magnet; 2a, a blade; 3. a bushing; 3a, knurling; 4. a first lead-in part; 5. a second lead-in part; 6. a third lead-in part; 7. and a fourth introduction part.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the rotor assembly of the motor includes a rotating shaft 1 and a magnet 2, the magnet 2 is cylindrical, and further includes a cylindrical bushing 3, the rotating shaft 1 is inserted into the bushing 3 and is firmly connected with the bushing, the bushing 3 is inserted into the magnet 2 and has a connecting structure between the two for firmly connecting the two, and the end of the magnet 2 further has a heat dissipation structure.

As shown in fig. 3, the connecting structure includes knurling 3a on the outside of the bush 3. In this embodiment, the knurls 3a are in the shape of a fishing net.

3 upper ends of bush and 2 upper end parallel and level of magnet, 3 lower extremes of bush and 2 lower extreme parallel and level of magnet, above-mentioned annular knurl 3a circumference equipartition are in 3 middle part outsides departments of bush.

The heat dissipation structure comprises a plurality of blades 2a protruding out of the end part of the magnet 2, and the plurality of blades 2a are circumferentially and uniformly distributed by taking the center of the magnet 2 as a reference.

The blade 2a is in a strip shape, and the blade 2a and the magnet are in an integrated structure.

The inner port of the bush 3 is provided with a smoothly transitional leading-in part one 4.

The outer port of the bush 3 is provided with a smoothly transiting lead-in part two 5.

The end of the rotating shaft 1 is provided with a smoothly transitional leading-in part three 6.

The inner port of the magnet 2 has a smoothly transitioning lead-in four 7.

The first introduction part 4, the second introduction part 5, the third introduction part 6 and the fourth introduction part 7 are rounded, but it is also possible to chamfer the first introduction part 4, the second introduction part 5, the third introduction part 6 and the fourth introduction part 7 according to actual conditions.

The motor rotor assembly creatively enables the lining to be firmly connected with the magnet through the connecting structure, and finally the rotating shaft is stably and fixedly connected with the magnet as the rotating shaft is fixedly connected with the lining.

Meanwhile, the motor rotor assembly is arranged in the shell, and the rotating shaft is connected with a bearing which is arranged between the shell and the magnet. Because heat radiation structure is close to the bearing, the quick air current that the magnet rotated the in-process and produces can also be to the bearing heat dissipation to improve motor rotor subassembly's stability.

The rotor system of the motor creatively integrates the magnet and the middle lining sleeve into a whole by injection and embedding, thereby ensuring the reliability of the fixation of the magnet; then the integrated assembly is magnetized, so that the magnetic characteristic parameters are ensured; and finally, the assembly is pressed into the rotating shaft to form tight fit, so that the connection stability of the magnet on the rotating shaft is ensured.

In addition, the number of the assemblies for pressing the rotating shaft can be one or more.

The features of the above-described embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of the features in the above-described embodiments will not be described in detail, but should be construed as being within the scope of the present disclosure unless there is any conflict between such combinations of features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. The utility model provides a motor rotor subassembly, includes pivot and magnet, and above-mentioned magnet is cylindricly, its characterized in that still includes cylindric bush, and above-mentioned pivot is worn to establish on the bush and both firmly connect, and above-mentioned bush is worn to establish and is had the connection structure that enables both firm connections between the two at the magnet inboard, the magnet tip still has heat radiation structure.

2. The electric machine rotor assembly of claim 1, wherein the connection structure comprises knurling of the outside of the bushing.

3. The electric machine rotor assembly of claim 2, wherein the knurls are in the form of a fishing net.

4. A motor rotor assembly according to claim 3, wherein the upper end of the bushing is flush with the upper end of the magnet and the lower end of the bushing is flush with the lower end of the magnet, the knurls being circumferentially and evenly distributed at the outer side of the middle of the bushing.

5. The rotor assembly of an electric machine as claimed in claim 4, wherein the heat sink includes a plurality of fins protruding from the end of the magnet, the plurality of fins being circumferentially spaced about the center of the magnet.

6. The electric machine rotor assembly of claim 5 wherein the blades are elongated and are integral with the magnets.

7. The electric machine rotor assembly as claimed in claim 6, wherein the bushing inner port has a smooth transition lead-in portion one.

8. The electric machine rotor assembly as claimed in claim 7, wherein the bushing has a smooth transition lead-in at the outer port.

9. The electric machine rotor assembly of claim 8, wherein the shaft end has a smooth transition lead-in third.

10. The electric machine rotor assembly of claim 9, wherein the magnet inner port has a smooth transition lead-in four.

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