Rotor sheet for optimizing motor skewed pole and motor

Abstract

The utility model discloses a rotor sheet for optimizing a motor skewed pole, which is arranged in a motor, the rear end of the rotor sheet is coaxially connected with a fan, vent holes are arranged on the rotor sheets in a penetrating manner, two positioning keys with asymmetric positions are arranged on the inner circles of the rotor sheets, the rotor sheets are arranged on a rotating shaft in a mutually overlapped manner, and the rotor sheets are arranged on the rotating shaft. And the positioning key is clamped in a clamping groove correspondingly formed in the rotating shaft. The utility model also provides a motor comprising the rotor sheet for optimizing the motor skewed pole. According to the utility model, the ventilation holes are arranged on the rotor sheets in a penetrating manner, so that the heat dissipation effect of the motor rotor is improved; and meanwhile, the rotor sheets are formed into the same sheet type by adopting the same mold, and the rotor sheets are arranged on the front surface, the front surface is rotated by 180 degrees and the back surface is arranged when the rotor sheets are overlapped, so that the rotor sheets are not completely overlapped to realize the skewed pole of the rotor, a plurality of molds are not needed to form the rotor sheets of different sheet types, the production cost is reduced, and the optimization of the skewed pole of the motor is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a rotor sheet and a motor for optimizing the skew poles of a motor. Background Art

[0002] In order to solve the cogging torque problem of integer slot brushless motors, slots or skewed poles are generally used to improve the cogging torque, and the rotor skewed poles can be achieved by a segmented structure. For previous motors, in order to reduce the motor cogging torque, after the rotor segmentation exceeds two sections, basically two types of rotor sheets are used to achieve the rotor skewed poles, and different rotor sheets require different molds for processing and forming, which undoubtedly increases the manufacturing cost of the motor. In addition, the heat dissipation effect of the motor in the prior art is poor. When the motor rotor is overheated, it is easy to cause damage to the motor, thereby affecting the service life of the motor. Utility Model Content

[0003] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a rotor sheet and a motor with optimized motor skew poles, which solves the problem that in the prior art, a variety of motor rotor sheet types are used to achieve the skew poles of the rotor, and multiple molds are required to form the rotor sheets, which in turn causes high production costs and poor heat dissipation effect of the existing motor rotors.

[0004] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0005] A rotor plate for optimizing the oblique poles of a motor, the rotor plate being arranged in the motor and coaxially connected to a fan at the rear end, a plurality of ventilation holes being penetrated through the rotor plate, and two asymmetrical positioning keys being arranged on the inner circle of the rotor plate, the rotor plates being in plurality and being superimposed on each other, and the positioning keys on one side of the rotor plates being flush after being superimposed, the rotor plate being mounted on a rotating shaft, and the positioning keys being clamped in corresponding slots on the rotating shaft.

[0006] With the above-mentioned structural design, ventilation holes are provided through the rotor sheets, hot air enters the ventilation holes of the rotor from the front end of the motor, and then is taken out by the fan arranged at the rear end of the motor, thereby improving the heat dissipation effect of the motor rotor and improving the service life of the motor; at the same time, the rotor sheets are formed into the same sheet shape by the same mold, and when the rotor sheets are superimposed, they are not completely overlapped to achieve the skewed poles of the rotor. Therefore, there is no need for multiple molds to form rotor sheets of different sheet shapes, which reduces the production cost and achieves the optimization of the skewed poles of the motor.

[0007] As a further improvement, the symmetrical position of one of the positioning keys of the rotor plate is deviated by a certain angle relative to the other positioning key, and an identification groove is provided on one of the positioning keys.

[0008] With the above structural design, it can be ensured that when the rotor sheets are stacked and installed, they can be aligned through the positioning keys on one side, so that the rotor sheets will not overlap after being stacked, realizing the inclined poles of the rotor. Moreover, the design of the identification grooves facilitates the installation.

[0009] As a further improvement, the number of the rotor sheets is 3 or 5 or 7, corresponding to the three-section inclined poles, five-section inclined poles or seven-section inclined poles respectively.

[0010] As a further improvement, the number of the rotor sheets is 3, and three-section inclined poles are adopted, including the first rotor sheet, the second rotor sheet and the third rotor sheet. Among them, the first rotor sheet is arranged with the front side facing forward, the second rotor sheet is arranged with the front side rotated 180 degrees, and the third rotor sheet is arranged with the reverse side facing forward. And the positioning keys on one side of the first rotor sheet, the second rotor sheet and the third rotor sheet are aligned.

[0011] With the above structural design, through the above installation method of the rotor sheets, the rotor sheets after being stacked can be made non-overlapping, realizing the inclined poles of the rotor. It does not need to be realized by different rotor sheet types, and only one forming die is required to complete, thus reducing the production cost.

[0012] As a further improvement, clamping grooves are opened on both sides of the rotating shaft, including a first clamping groove and a second clamping groove. The positioning keys flush with each other inside the rotor sheet are clamped and installed in the first clamping groove, and the width of the second clamping groove is greater than that of the first clamping groove to ensure that the positioning keys on the other side of the rotor sheet are installed in the second clamping groove.

[0013] With the above structural design, the first clamping groove can ensure the clamping and fixing of the rotor sheet after installation, and the second clamping groove can ensure the smooth installation of the non-flush positioning keys in the groove. This structural design is ingenious and ensures the stability of the installation.

[0014] As a further improvement, a limiting boss is provided on the rotating shaft, and the clamping groove is formed by extending and penetrating from the limiting boss to the other side.

[0015] As a further improvement, limiting pieces are respectively provided at both ends of the rotating shaft corresponding to the rotor sheet to limit the axial movement of the rotor sheet, and through holes are opened on the limiting pieces corresponding to the ventilation holes.

[0016] With the above structural design, the setting of the limiting boss can improve the convenience of installation when the rotor sheet is installed. It only needs to abut the limiting piece at the end of the rotor sheet against the limiting boss. Moreover, the setting of the limiting pieces at both ends of the rotor sheet can play a role in limiting the rotor sheet and prevent axial movement during high-speed rotation.

[0017] As a further improvement, the motor further includes a stator and a housing. The housing is arranged at both ends of the stator. The rotor sheet is rotatably arranged inside the stator, and one end of the rotating shaft is rotatably installed at the front end of the housing, and the other end is fixedly connected to the fan.

[0018] To achieve the above object, the present utility model further provides a motor, including the rotor sheet for optimizing the skewed poles of the motor described above.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] By providing ventilation holes penetrating through the rotor sheet, the heat dissipation effect of the motor rotor is improved, and the service life of the motor is prolonged. At the same time, the rotor sheets are formed into the same sheet shape by the same mold, and when the rotor sheets are stacked, they are arranged with the front side facing up, rotated 180 degrees with the front side facing up, arranged with the back side facing up and the positioning keys on one side aligned, so that the rotor sheets do not completely overlap to achieve the skewed poles of the rotor. It is not necessary to use multiple molds to form rotor sheets of different sheet shapes, reducing the production cost and realizing the optimization of the skewed poles of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the following specific embodiments to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is Figure 1 exploded view of

[0024] Figure 3 is a schematic structural diagram at the rotor sheet of the present utility model;

[0025] Figure 4 is Figure 3 structural diagram from another angle;

[0026] Figure 5 is a cross-sectional view of the present utility model.

[0027] In the figures:

[0028] rotor sheet 1, first rotor sheet 1a, second rotor sheet 1b, third rotor sheet 1c, fan 2, ventilation hole 3, positioning key 4, identification groove 4a, rotating shaft 5, card slot 5a, first card slot 51a, second card slot 52a, limiting boss 5b, limiting piece 6, through hole 6a, stator 7, housing 8, bearing 9, protective shell 10, air outlet 10a. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To describe in detail the technical content, structural features, achieved object and effects of the present utility model, the following is described in detail in combination with the embodiments and with reference to the drawings.

[0030] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0031] Embodiment 1

[0032] Please refer to Figures 1 to 5 , a rotor sheet for optimizing the skewed poles of a motor. The rotor sheet 1 is arranged inside the motor and coaxially connected with a fan 2 at the rear end. A plurality of ventilation holes 3 are penetrated through the rotor sheet 1, so that cooling air can enter the rotor sheet 1 through the ventilation holes 3, and the heat is taken out by the fan 2. In this embodiment, the number of the ventilation holes 3 can be designed according to requirements, and the ventilation holes 3 are designed in a pentagon shape to increase the heat dissipation area. Two asymmetric positioning keys 4 are arranged on the inner circle of the rotor sheet 1. Among them, one positioning key 4 of the rotor sheet 1 deviates from the symmetric position of the other positioning key 4 by a certain angle. The rotor sheets 1 are multiple and are arranged in an overlapping manner, and after overlapping, one side of the positioning keys 4 of the rotor sheets 1 is flush. The specific installation method is as follows: the number of the rotor sheets 1 is 3, and three-stage skewed poles are adopted, including a first rotor sheet 1a, a second rotor sheet 1b, and a third rotor sheet 1c. Among them, the first rotor sheet 1a is arranged in the front, the second rotor sheet 1b is arranged after rotating 180 degrees in the front, and the third rotor sheet 1c is arranged in the reverse, and one side of the positioning keys 4 of the first rotor sheet 1a, the second rotor sheet 1b, and the third rotor sheet 1c is flush. An identification groove 4a is opened on one of the positioning keys 4, which can play a role of identification during the installation of the rotor sheet 1, making the installation more convenient. The rotor sheet 1 is installed on a rotating shaft 5, and the positioning key 4 is clamped in a corresponding slot 5a opened on the rotating shaft 5.

[0033] Please refer to Figure 5 , further, the two sides of the rotating shaft 5 are provided with slots 5a including a first slot 51a and a second slot 52a. The flush positioning keys 4 inside the rotor sheet 1 are clamped and installed in the first slot 51a, and the width of the second slot 52a is greater than that of the first slot 51a to ensure that the positioning keys 4 on the other side of the rotor sheet 1 are installed in the second slot 52a.

[0034] A limiting boss 5b is provided on the rotating shaft 5, and the clamping groove 5a is formed by extending and penetrating from the limiting boss 5b to the other side. Limiting pieces 6 are respectively provided at both ends of the rotor sheet 1 on the rotating shaft 5 to limit the axial movement of the rotor sheet 1. The limiting piece 6 at one end abuts against the limiting boss 5b, and the other end is fixed by a fixing nut. Through holes 6a corresponding to the ventilation holes 3 are provided on the limiting piece 6.

[0035] The motor further includes a stator 7 and a housing 8. The housing 8 is arranged at both ends of the stator 7. The rotor sheet 1 is rotatably arranged in the stator 7. One end of the rotating shaft 5 is rotatably installed at the front end of the housing 8 through a bearing 9, and the other end is fixedly connected to the blower 2. A protective housing 10 is provided outside the blower 2, and an air outlet 10a is provided on the protective housing 10 for discharging hot air.

[0036] The working principle of the present utility model is as follows:

[0037] The assembly method of the rotor sheet 1 is that the first rotor sheet 1a is arranged with the front side facing up, the second rotor sheet 1b is arranged with the front side rotated 180 degrees, and the third rotor sheet 1c is arranged with the back side facing up. And the positioning keys 4 on one side of the first rotor sheet 1a, the second rotor sheet 1b and the third rotor sheet 1c are flush. The front and back sides of the rotor sheet 1 can be identified through the identification groove 4a, improving the installation efficiency. The composed rotor sheets 1 are combined together without overlapping to achieve the skewed poles of the rotor. Since the rotor sheets 1 have the same shape, only one mold is required for molding, reducing the cost. The skewed pole optimization can be completed only through the above assembly method. The assembled rotor sheet 1 is installed on the rotating shaft 5, and the positioning key 4 on the flush side is clamped in the first clamping groove 51a of the rotating shaft 5, and the non-flush positioning key 4 on the other side is installed in the second clamping groove 52a. At the same time, the limiting piece 6 is installed on the rotating shaft 5 and is located at both ends of the rotor sheet 1 to play a limiting role. Then the front end of the rotating shaft 5 is rotatably installed on the housing 8 through a bearing 9. At the same time, the blower 2 is installed at the rear end of the rotating shaft 5.

[0038] Embodiment 2

[0039] This embodiment has the same structure as Embodiment 1, and the difference lies in that the number of the rotor sheets 1 is 5, and five-segment skewed poles are adopted.

[0040] Embodiment 3

[0041] This embodiment has the same structure as Embodiment 1, and the difference lies in that the number of the rotor sheets 1 is 7, and seven-segment skewed poles are adopted.

[0042] The present utility model also provides a motor, including the rotor sheet for optimizing the skewed poles of the motor as described above.

[0043] Based on the disclosure and teachings of the above specification, those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present utility model should also fall within the protection scope of the claims of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model. Any other devices using the same or similar ones are within the protection scope of the present utility model.

Claims

1. A rotor sheet for optimizing the skewed poles of a motor, wherein the rotor sheet (1) is arranged in the motor and a fan (2) is coaxially connected to the rear end thereof, characterized in that: The rotor sheet (1) is provided with a plurality of ventilation holes (3) through it, and the inner circle of the rotor sheet (1) is provided with two asymmetrical positioning keys (4), the rotor sheet (1) is provided in a plurality and is superimposed on each other, and after superposition, the positioning keys (4) on one side of the rotor sheet (1) are aligned, the rotor sheet (1) is mounted on a rotating shaft (5), and the positioning keys (4) are clamped in corresponding clamping grooves (5a) provided on the rotating shaft (5).

2. A rotor sheet for optimizing motor skew poles as claimed in claim 1, characterized in that: The symmetrical position of one of the positioning keys (4) of the rotor plate (1) deviates by a certain angle relative to the other positioning key (4), and a marking groove (4a) is provided on one of the positioning keys (4).

3. A rotor sheet for optimizing motor skew poles as claimed in claim 1 or 2, characterized in that: The number of the rotor plates (1) is 3, 5 or 7, corresponding to three sections of inclined poles, five sections of inclined poles or seven sections of inclined poles.

4. A rotor sheet for optimizing motor skew poles as claimed in claim 3, characterized in that: The rotor plates (1) are three in number and adopt three-stage oblique poles, including a first rotor plate (1a), a second rotor plate (1b) and a third rotor plate (1c), wherein the first rotor plate (1a) is arranged on the front side, the second rotor plate (1b) is arranged on the front side rotated 180 degrees, and the third rotor plate (1c) is arranged on the back side, and the positioning keys (4) on one side of the first rotor plate (1a), the second rotor plate (1b) and the third rotor plate (1c) are flush.

5. A rotor sheet for optimizing motor skew poles as claimed in claim 4, characterized in that: The rotating shaft (5) is provided with slots (5a) on both sides thereof, including a first slot (51a) and a second slot (52a); a flush positioning key (4) in the rotor plate (1) is clamped and installed in the first slot (51a); the width of the second slot (52a) is greater than the width of the first slot (51a) to ensure that the positioning key (4) on the other side of the rotor plate (1) is installed in the second slot (52a).

6. The rotor sheet for optimizing motor skew poles according to claim 1, characterized in that: The rotating shaft (5) is provided with a limiting boss (5b), and the clamping groove (5a) is formed by extending from the limiting boss (5b) to the other side and penetrating through the boss.

7. The rotor sheet for optimizing motor skew poles according to claim 1, characterized in that: The rotating shaft (5) is provided with limit plates (6) at both ends of the rotor plate (1) to limit the axial movement of the rotor plate (1), and the limit plates (6) are provided with through holes (6a) corresponding to the ventilation holes (3).

8. The rotor sheet for optimizing motor skew poles according to claim 1, characterized in that: The motor further comprises a stator (7) and a housing (8), wherein the housing (8) is arranged at both ends of the stator (7), the rotor sheet (1) is rotatably arranged in the stator (7), and one end of the rotating shaft (5) is rotatably mounted on the front end of the housing (8), and the other end is fixedly connected to the fan (2).

9. A motor, characterized in that: A rotor sheet for optimizing motor skew poles comprising the rotor sheet as described in any one of claims 1-7.

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