WO2020140474A1

WO2020140474A1 - Rotor assembly and motor using same

Info

Publication number: WO2020140474A1
Application number: PCT/CN2019/105346
Authority: WO
Inventors: 熊华云
Original assignee: 中山大洋电机股份有限公司
Priority date: 2019-01-05
Filing date: 2019-09-11
Publication date: 2020-07-09
Also published as: CN209419452U

Abstract

A rotor assembly (6) and a motor using same. The rotor assembly (6) comprises a rotor core (1), end rings (2) located on both end surfaces of the rotor core (1), and guide bars (3) connecting the two end rings (2); several guide bar installation grooves (14) are provided at intervals on the edge of the rotor core (1) in the circumferential direction; the guide bars (3) are located inside the guide bar installation grooves (14); a shaft hole (13) for installing a rotating shaft (4) is provided in the middle of the rotor core (1); the rotor core (1) is formed by alternately stacking at least two first sheet groups (11) and at least one second sheet group (12); each first sheet group (11) comprises a first yoke (111) and several first teeth (112) extending outward from the first yoke (111); the second sheet group (12) comprises a second yoke (121) and several second teeth (122) extending outward from the second yoke (121); some of or all of the second teeth (122) are recessed in a direction from the side to the shaft hole (13) to form heat dissipation grooves (15). The heat dissipation grooves (15) of the second sheet group (12) effectively increase the heat dissipation area of the rotor, and thus, the temperature rise of a motor is reduced, and the weight of the rotor core (1) is reduced, thereby reducing the design costs and transport costs of motors.

Description

Rotor assembly and motor for its application

Technical field:

The utility model relates to a rotor assembly and a motor applied thereto.

Background technique:

In the existing small motors, the rotor assembly includes a rotor core, end rings located at both ends of the rotor core, and a guide bar connecting the two ends of the ring. A number of guide bar installation slots are circumferentially spaced at the edge of the rotor core, and the guide bar is located at the guide In the installation slot, the shaft hole for installing the rotating shaft is arranged in the middle of the rotor core. Existing small motors often have problems such as temperature rise, low efficiency, and high cost during the development process. In order to improve product competitiveness, it is necessary to improve the rotor components that occupy the largest proportion of motor space and weight.

Utility model content:

The purpose of the utility model is to provide a rotor assembly and its applied motor, which can solve the problems of increased temperature and low efficiency of the motor.

The purpose of the utility model is achieved through the following technical solutions.

The first object of the present invention is to provide a rotor assembly, which includes a rotor core, end rings located at both ends of the rotor core, and guide bars connecting the two ends of the ring. A number of guide bars are circumferentially spaced at the edge of the rotor core The installation slot, the guide bar is located inside the guide bar installation slot, and a shaft hole for installing a rotating shaft is arranged in the middle of the rotor iron core, which is characterized in that the rotor iron core is composed of at least two sets of first punch plate groups and at least one set of second punch plate groups Stacked at intervals, the first punch group includes a first yoke and a number of first teeth extending outward from the first yoke, the second punch group includes a second yoke and outward from the second yoke A plurality of protruding second tooth parts, the first yoke part and the second yoke part are correspondingly arranged, the first tooth part and the second tooth part are correspondingly arranged, two adjacent first tooth parts, two adjacent second tooth parts The guide bar mounting grooves are formed between them, and part or all of the second tooth portions are recessed from the side surfaces toward the shaft hole to form heat dissipation grooves.

The depth H1 of the groove bottom of the heat dissipation groove is greater than the depth H2 of the guide bar installation groove.

Above the two ends of the rotor core are the first punch plate group.

The above-mentioned at least two groups of first-punch film groups refer to 3 groups or 4 groups or 5 groups; at least one group of second-punch film groups refer to 2 groups or 3 groups or 4 groups.

The first yoke portion is provided with a plurality of first ventilation holes, and the second yoke portion is provided with a plurality of second ventilation holes. The first ventilation holes are axially connected to the second ventilation holes, and the groove bottom of part of the heat dissipation grooves passes through The groove of the extension section communicates with the second vent hole.

The above-mentioned first and second ventilation holes are evenly distributed along the circumferential direction and are located between the shaft hole and the inner side of the end ring.

The above heat dissipation grooves with the grooves of the extending section are evenly arranged in the circumferential direction.

The above-mentioned groove of the extending section is a straight groove or an arc groove.

A plurality of fan blades are provided on the end ring on one end surface of the rotor iron core, and a plurality of fan blades are integrally formed with the end ring and the guide bar by aluminum casting.

The above-mentioned rotating shaft is installed in the shaft hole, and a fan is installed on the rotating shaft. The fan and the fan blade are located on both sides of the rotor core.

The second object of the present invention is to provide a motor including a rotor assembly, characterized in that the rotor assembly is the rotor assembly described above.

Compared with the prior art, the utility model has the following effects:

1) In the rotor assembly of the present invention, the rotor core is formed by stacking at least two sets of first punch plate groups and at least one set of second punch plate groups. The first punch plate group includes a first yoke and a A plurality of first teeth extending outward from a yoke, the second punch set includes a second yoke and a plurality of second teeth extending outward from the second yoke, the first yoke and the second yoke Correspondingly arranged, the first tooth portion and the second tooth portion are correspondingly arranged, the guide bar mounting groove is formed between two adjacent first tooth portions and two adjacent second tooth portions, and part or all of the second tooth portion The heat sink groove is formed inward from the side to the direction of the shaft hole; the first punch sheet group ensures that the outer diameter of the rotor core is the same as the existing rotor core, which is convenient for product replacement, and ensures the overall hardness of the rotor core, the second The heat dissipation groove of the punching set effectively increases the heat dissipation area of the rotor, thereby reducing the temperature rise of the motor and the weight of the rotor core, thereby reducing the design cost and transportation cost of the motor;

2) The depth H1 of the groove bottom of the heat dissipation groove of the present invention is larger than the depth H2 of the guide bar installation groove, further increasing the heat dissipation area;

3) At least two groups of the first punch group of the present invention refer to 3 groups or 4 groups or 5 groups; at least one group of the second punch group refers to 2 groups or 3 groups or 4 groups; further reducing the rotor core weight;

4) The first yoke part of the present invention is provided with a plurality of first ventilation holes, and the second yoke part is provided with a plurality of second ventilation holes. The first ventilation hole and the second ventilation hole are axially connected, and part of the heat dissipation concave The groove bottom of the groove communicates with the second ventilation hole through the groove of the extension section; the first ventilation hole and the second ventilation hole form an axial heat dissipation channel, and the heat dissipation groove with the groove of the extension section communicates with the second ventilation hole Radial heat dissipation channels to further enhance the heat dissipation effect of the rotor core;

5) The first and second ventilation holes are evenly distributed along the circumferential direction and are located between the shaft hole and the inner side of the end ring; the heat dissipation grooves with the grooves of the extension sections are evenly arranged in the circumferential direction; Make the heat flow fast and even;

6) A number of fan blades are provided on the end ring on one end face of the rotor core, and a number of fan blades are integrally cast with aluminum and the end ring and the guide bar; the fan blades can enhance the heat dissipation effect inside the rotor assembly;

7) The rotating shaft is installed in the shaft hole, and a fan is installed on the rotating shaft, and the fan and the wind blade are located on both sides of the rotor core; the heat dissipation effect of the rotor is further strengthened;

8) The improvement of the rotor assembly reduces the weight of the rotor and increases the heat dissipation effect, thereby reducing the loss of the motor and improving the efficiency of the motor under the same conditions.

BRIEF DESCRIPTION:

1 is a schematic structural diagram of a rotor assembly provided in Embodiment 1 of the present invention;

2 is a schematic structural view of the rotor assembly provided in Embodiment 1 after the rotor core and end ring are combined;

Figure 3 is an exploded view of Figure 2;

4 is a schematic structural view of the rotor core of the first embodiment;

Figure 5 is an exploded view of Figure 4;

6 is a plan view of the first punch sheet group of the first embodiment;

7 is a plan view of the second punch group of the first embodiment;

FIG. 8 is an enlarged view at A of FIG. 7;

9 is a schematic structural view of the rotor assembly provided in Embodiment 2 after the rotor core and end ring are combined;

10 is a schematic structural view of the rotor core of the second embodiment;

11 is a plan view of the first punch group of the second embodiment;

12 is a plan view of the second punch group of the second embodiment;

13 is a top view of the rotor assembly provided in Embodiment 3 after the rotor core and end ring are combined;

14 is a cross-sectional view taken along line B-B of FIG. 13;

15 is a schematic structural view of the rotor core of the third embodiment;

16 is a plan view of the second punch group of the third embodiment.

detailed description:

The present invention will be described in further detail below through specific embodiments and drawings.

Example one:

As shown in FIGS. 1 to 8, this embodiment provides a rotor assembly including a rotor core 1, an end ring 2 located on both ends of the rotor core 1, and a guide bar 3 connecting the two end rings 2. The rotor iron A plurality of guide bar mounting grooves 14 are circumferentially spaced on the edge of the core 1, the guide bar 3 is located inside the guide bar mounting groove 14, and a shaft hole 13 for installing the rotating shaft 4 is provided in the middle of the rotor core 1, which is characterized in that: the rotor core 1 At least two sets of first punching piece groups 11 and at least one set of second punching piece groups 12 are spaced and stacked. The first punching piece group 11 includes a first yoke portion 111 and a plurality of pieces extending outward from the first yoke portion 111 The first tooth portion 112 and the second punch group 12 include a second yoke portion 121 and a plurality of second tooth portions 122 extending outward from the second yoke portion 121, and the first yoke portion 111 and the second yoke portion 121 are provided correspondingly , The first tooth portion 112 and the second tooth portion 122 are provided correspondingly, and the guide bar mounting groove 14 is formed between two adjacent first tooth portions 112 and two adjacent second tooth portions 122, and part or all of the first The two-tooth portion 122 is recessed from the side surface toward the axis hole 13 to form the heat dissipation groove 15.

The depth H1 of the groove bottom 151 of the heat dissipation groove 15 is greater than the depth H2 of the guide bar mounting groove 14.

Above the two ends of the rotor core 1 are the first punching plate groups 11. At least two groups of the first punch group 11 refer to 3 groups or 4 groups or 5 groups; at least one group of the second punch group 12 refer to 2 groups or 3 groups or 4 groups.

In this embodiment, the rotor core 1 is formed by stacking 4 sets of first

punching piece groups

11 and 3 sets of second punching piece groups 12 at intervals. All the second teeth 122 are recessed from the side toward the shaft hole 13 to form the heat dissipation groove 15.

A plurality of fan blades 22 are provided on the end ring 2 on one end surface of the rotor iron core 1, and the plurality of fan blades 22 are formed integrally with the end ring 2 and the guide bar 3 by aluminum casting.

The rotating shaft 4 is installed in the shaft hole 13. A fan 5 is installed on the rotating shaft 4. The fan 5 and the fan blade 22 are located on both sides of the rotor core 1.

Example two:

As shown in FIGS. 9-12, this embodiment provides a rotor assembly similar to the rotor assembly described in Embodiment 1, except that:

The above-mentioned rotor core 1 is formed by stacking 4 sets of first

punching piece groups

11 and 3 sets of second punching piece groups 12, the first yoke 111 of the first punching piece group 11 is provided with a plurality of first ventilation holes 113. The second yoke 121 of the second punch group 12 is provided with a plurality of second vent holes 123, and the first vent hole 113 and the second vent hole 123 communicate axially.

The above-mentioned first vent hole 113 and second vent hole 123 are evenly distributed along the circumferential direction and are located between the shaft hole 13 and the inner side surface 21 of the end ring 2.

In the second punch plate group 12, part of the second tooth portions 122 are recessed from the side toward the axis hole 13 to form heat dissipation grooves 15. Specifically, each third tooth portion 122 is provided with a heat dissipation groove 15.

The groove bottom 151 of the heat dissipation groove 15 communicates with the second ventilation hole 123 through the extension groove 152.

The first ventilation hole 113 communicates with the second ventilation hole 123 to form an axial heat dissipation channel 161, and the heat dissipation groove 15 with the extension groove 152 communicates with the second ventilation hole 123 to form a radial heat dissipation channel 162, which further strengthens The cooling effect of the rotor assembly.

The groove 152 of the extending section is an arc-shaped groove.

Example three:

As shown in FIG. 13 to FIG. 16, this embodiment provides that the rotor assembly is similar to the rotor assembly described in Embodiment 2, except that:

The above-mentioned rotor core 1 is formed by stacking 4 sets of first

punching piece groups

11 and 3 sets of second punching piece groups 12, in the second punching piece group 12, all the second tooth parts 122 are oriented from the side to the axis The hole 13 is recessed in the direction of the heat dissipation groove 15.

The groove bottom 151 of the partial heat dissipation groove 15 communicates with the second ventilation hole 123 through the extension groove 152, specifically one out of every three heat dissipation grooves 15 passes through the extension groove 152 and the second ventilation hole 123 connected.

The heat dissipation grooves 15 with the extension grooves 152 are evenly arranged in the circumferential direction.

The aforementioned groove 152 of the extension section is a linear groove.

The groove bottom 151 of the heat dissipation groove 15 communicates with the second ventilation hole 123 through the extension groove 152 to form a radial airflow channel, and the first ventilation hole 113 and the second ventilation hole 123 form an axial airflow channel, so that the entire rotor assembly The heat dissipation is more uniform, resulting in faster heat dissipation efficiency.

Example 4:

This embodiment provides a motor including a rotor assembly 6, characterized in that the rotor assembly 6 is the rotor assembly described in Embodiment 1 or Embodiment 2 or Embodiment 3.

The above embodiments are the preferred embodiments of the utility model, but the embodiments of the utility model are not limited thereto. Any other changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the utility model are all All equivalent replacement methods are included in the protection scope of the present invention.

Claims

A rotor assembly includes a rotor core (1), an end ring (2) located at both ends of the rotor core (1), and a guide bar (3) connecting the two end rings (2). The rotor core (1) A number of guide bar mounting grooves (14) are provided at circumferential intervals on the edge, the guide bar (3) is located inside the guide bar mounting groove (14), and a shaft hole (13) for installing the rotating shaft (4) is provided in the middle of the rotor core (1) , Characterized in that: the rotor core (1) is formed by stacking at least two sets of first punch group (11) and at least one set of second punch group (12), the first punch group (11) includes A yoke (111) and a number of first teeth (112) extending outward from the first yoke (111), the second punch set (12) includes a second yoke (121) and a second yoke A plurality of second tooth portions (122) extending outward from the portion (121), the first yoke portion (111) and the second yoke portion (121) are provided correspondingly, the first tooth portion (112) and the second tooth portion (122) ) Correspondingly, the guide bar mounting groove (14) is formed between two adjacent first teeth (112) and two adjacent second teeth (122), and part or all of the second teeth (122) ) The heat dissipation groove (15) is formed concavely from the side toward the shaft hole (13).
A rotor assembly according to claim 1, characterized in that the depth H1 of the groove bottom (151) of the heat dissipation groove (15) is greater than the depth H2 of the guide bar mounting groove (14).
A rotor assembly according to claim 1, characterized in that at both ends of the rotor core (1) is a first punch group (11).
A rotor assembly according to claim 3, characterized in that: at least two groups of first punch group (11) refer to 3 groups or 4 groups or 5 groups; at least one group of second punch group (12) are Refers to 2 groups or 3 groups or 4 groups.
A rotor assembly according to claim 1 or 2 or 3 or 4, characterized in that: the first yoke (111) is provided with a plurality of first ventilation holes (113), and the second yoke (121) Several second vent holes (123) are provided, the first vent hole (113) and the second vent hole (123) are axially connected, and the groove bottom (151) of part of the heat dissipation groove (15) passes through the extension groove ( 152) Communicate with the second vent hole (123).
A rotor assembly according to claim 5, characterized in that: the first ventilation hole (113) and the second ventilation hole (123) are evenly distributed along the circumferential direction and are located in the shaft hole (13) and the end ring (2) Between the inner sides (21).
A rotor assembly according to claim 6, wherein the heat dissipation grooves (15) with the grooves (152) of the extending section are evenly arranged in the circumferential direction.
A rotor assembly according to claim 7, characterized in that the groove (152) of the extension section is a linear groove or an arc-shaped groove.
A rotor assembly according to claim 6, characterized in that a plurality of fan blades (22) and a plurality of fan blades (22) are provided on the end ring (2) of one end face of the rotor core (1) ) It is integrally formed by aluminum casting with end ring (2) and guide bar (3).
A rotor assembly according to claim 9, characterized in that the rotating shaft (4) is installed in the shaft hole (13), a fan (5) is installed on the rotating shaft (4), the fan (5) and the wind The blades (22) are located on both sides of the rotor core (1).
A motor includes a rotor assembly (6), characterized in that the rotor assembly (6) is the rotor assembly according to any one of claims 1 to 10.