Rotor and water fetching motor

Abstract

The utility model provides a rotor and a water fetching motor. The rotor comprises a rotor housing, a motor housing, a magnet and a balance block. A boss is arranged in an inner cavity of the rotor shell, a plurality of notches are formed in the boss, and the number of the balance blocks is equal to that of the notches. The gap and the side wall of the inner cavity of the rotor shell form a filling space, and the balance block is detachably arranged in the filling space; the motor shell is arranged in the inner cavity of the rotor shell and is connected with the boss; and the magnet is arranged in the motor shell. The rotor provided by the utility model has a function of adjusting dynamic balance, ensures stable operation of rotor rotation, and reduces vibration and wear, thereby improving the working performance and service life of the water fetching motor. The water fetching motor is high in structural stability, and the working performance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a rotor and a water pumping motor. Background Art

[0002] Mobile air conditioners are simple to install and use, and have obvious refrigeration effects, and are increasingly favored by consumers. An important component of a mobile air conditioner is a water pumping motor. The function of the water pumping motor is to drive a water pumping impeller by the motor to break the condensed water generated during the refrigeration of the compressor into small water droplets and adhere them to the condenser fins, thereby improving the refrigeration effect.

[0003] The rotor in the water pumping motor is one of the important components. When the water pumping motor is working, if the rotor is unbalanced, it will cause the rotor to vibrate and run unstably. However, the existing rotor structure does not have the function of adjusting dynamic balance, which greatly affects the working performance and service life of the water pumping motor. In addition, there are also components made of plastic in the rotor of the water pumping motor (such as the rotor housing, motor housing, etc.), and the components made of plastic are prone to problems that affect the structural stability of the rotor due to deformation during the injection molding process. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a rotor and a water pumping motor. The rotor has the function of adjusting dynamic balance, ensuring the stable operation of the rotor rotation, reducing vibration and wear, thereby improving the working performance and service life of the water pumping motor. The utility model also provides a water pumping motor with high structural stability, thereby improving the working performance.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions: A rotor, characterized in that: it includes a rotor housing, a motor housing, a magnet and a balance weight; a boss is arranged in the inner cavity of the rotor housing, the boss is provided with a plurality of notches, and the number of balance weights is equal to the number of notches; the notch and the inner cavity side wall of the rotor housing form a filling space, and the balance weight is detachably arranged in the filling space; the motor housing is arranged in the inner cavity of the rotor housing and is connected to the boss; the magnet is arranged inside the motor housing.

[0006] When the water pumping motor is working, when the rotor rotates unbalancedly, balance weights can be filled in the filling space to correct the balance amount of the rotor. The utility model can adjust the mass distribution of the rotor by filling balance weights to reduce or eliminate the unbalanced force generated during the rotation of the rotor, so that the rotor runs stably, reduces vibration and wear, thereby improving the working performance and service life of the water pumping motor.

[0007] The boss is arranged along the bottom edge of the inner cavity of the rotor housing.

[0008] A plurality of notches are arranged circumferentially along the boss.

[0009] A plurality of bumps are arranged on the inner cavity side wall of the rotor housing; the outer side wall of the motor housing abuts against the bumps. The bumps are radially positioned in cooperation with the outer circle of the motor housing to avoid deformation during the injection molding of plastic parts, improve the fitting accuracy, and further improve the stability of the rotor structure.

[0010] The bump is opposite to the boss area between two adjacent notches.

[0011] The inner cavity side wall of the rotor housing between two adjacent bumps and the notches enclose a filling space.

[0012] The upper end surface of the bump is a guiding inclined surface for facilitating the installation of the motor housing. This guiding inclined surface plays a guiding role when pressing and installing the motor housing.

[0013] A water pumping motor, characterized in that: it includes the above-mentioned rotor; this water pumping motor further includes a stator and a shaft body; one end of the shaft body extends into the rotor and is connected to the rotor housing, and the other end penetrates through the stator, so that the rotor is rotatably arranged outside the stator.

[0014] The stator includes an iron core plastic-encapsulated component and a stator base; the stator base is provided with a mounting post with a hollow structure; a through hole is provided in the middle of the iron core plastic-encapsulated component, a radial positioning portion for radially positioning with the through hole is provided on the surface of the mounting post of the stator base, and an axial positioning portion for axially positioning with the iron core plastic-encapsulated component is also provided on the surface of the mounting post of the stator base; the iron core plastic-encapsulated component is sleeved on the mounting post, and the stator base realizes positioning installation with the iron core plastic-encapsulated component through the radial positioning portion and the axial positioning portion.

[0015] In the above solution, the radial positioning portion and the axial positioning portion of the mounting post of the stator base of the present utility model can position the iron core plastic-encapsulated component to achieve positioning installation, so that the stator base and the iron core plastic-encapsulated component have a good joint effect and accurate positioning, thereby improving the structural stability of the water pumping motor and the working performance of the water pumping motor.

[0016] Both the radial positioning portion and the axial positioning portion are convex portions protruding outward from the mounting post, and the radial positioning portion and the axial positioning portion are alternately distributed on the outer surface of the mounting post;

[0017] When the stator base is positioned and installed with the iron core plastic-encapsulated component, the radial positioning portion cooperates with the hole wall of the through hole of the iron core plastic-encapsulated component for radial positioning;

[0018] The height of the axial positioning portion is less than the height of the mounting post; when the stator base is positioned and installed with the iron core plastic-encapsulated component, the axial positioning portion cooperates with the end of the iron core plastic-encapsulated component for axial positioning.

[0019] The radial positioning part and the axial positioning part of the utility model adopt a discontinuous structure instead of a continuous structure, which can avoid the problem of low positioning accuracy between the stator base and the iron core plastic coating assembly caused by shrinkage deformation during the injection molding process of plastic parts, thereby improving the installation stability.

[0020] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0021] 1. The rotor of the utility model has the function of adjusting dynamic balance, ensuring the smooth operation of the rotor rotation, reducing vibration and wear, thereby improving the working performance and service life of the water pumping motor.

[0022] 2. The water pumping motor of the utility model has high structural stability and can improve the working performance. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the rotor and the shaft body of the utility model;

[0024] Figure 2 is a schematic diagram of the rotor housing in the rotor of the utility model;

[0025] Figure 3 is an exploded view of the stator in Embodiment 2;

[0026] Figure 4 is an internal schematic diagram of the stator in Embodiment 2;

[0027] Figure 5 is a schematic diagram of the stator base in Embodiment 2;

[0028] Among them, 1 is the rotor housing, 2 is the motor housing, 3 is the magnet, 4 is the boss, 5 is the filling space, 6 is the convex block, 7 is the guiding inclined surface, 8 is the shaft body, 9 is the iron core plastic coating assembly, 10 is the stator base, 11 is the mounting post, 12 is the radial positioning part, 13 is the axial positioning part, 14 is the bearing, 15 is the support bar, and 16 is the PCB board. Detailed Embodiments

[0029] The following further describes the utility model in detail in conjunction with the drawings and the specific embodiments.

[0030] Embodiment 1

[0031] As Figure 1 and Figure 2As shown in the figure, the rotor of the present utility model includes a rotor housing 1, a motor housing 2, a magnet 3, and a balance weight (not shown). A boss 4 is provided in the inner cavity of the rotor housing 1. The boss 4 is provided with a plurality of notches. The number of balance weights is equal to the number of notches. The notches and the inner cavity side wall of the rotor housing 1 form a filling space 5. The balance weight is detachably arranged in the filling space 5 and is adapted to the filling space 5. The motor housing 2 is arranged in the inner cavity of the rotor housing 1 and is connected to the boss 4, and the magnet 3 is arranged inside the motor housing 2.

[0032] Specifically, the boss 4 is arranged along the bottom edge of the inner cavity of the rotor housing 1, and a plurality of notches are distributed circumferentially along the boss 4. In addition, a plurality of bumps 6 are arranged on the inner cavity side wall of the rotor housing 1, and the outer side wall of the motor housing 2 abuts against the bumps 6. The bumps 6 are in radial positioning cooperation with the outer circle of the motor housing 2, avoiding deformation during the injection molding process of plastic parts, improving the cooperation accuracy, and further improving the stability of the rotor structure.

[0033] In the present utility model, the bumps 6 are opposite to the boss 4 area between two adjacent notches. The inner cavity side wall of the rotor housing 1 between two adjacent bumps 6 and the notches enclose to form a filling space 5. In order to facilitate the installation of the motor housing 2, the upper end surface of the bump 6 is a guiding inclined surface 7 for facilitating the installation of the motor housing 2, and the guiding inclined surface 7 is used for guiding when pressing the motor housing 2 for installation.

[0034] When the water pumping motor is working, when the rotor rotates unbalancedly, balance weights can be filled in the filling space 5 to correct the balance amount of the rotor. The present utility model can adjust the mass distribution of the rotor by filling balance weights to reduce or eliminate the unbalanced force generated during the rotation of the rotor, so that the rotor runs smoothly, reduces vibration and wear, and thus improves the working performance and service life of the water pumping motor.

[0035] Embodiment Two

[0036] As Figure 1 and Figures 3 to 5 shown, the water pumping motor of the present utility model includes the rotor of Embodiment One. The water pumping motor further includes a stator and a shaft body 8. One end of the shaft body 8 extends into the rotor and is connected to the rotor housing 1, and the other end penetrates through the stator, so that the rotor is rotatably arranged outside the stator.

[0037] The stator of the present utility model includes an iron core plastic coating assembly 9 and a stator base 10. Among them, the stator base 10 is provided with a mounting post 11 with a hollow structure. A through hole is provided in the middle of the iron core plastic coating assembly 9. A radial positioning portion 12 for radial positioning with the through hole is provided on the surface of the mounting post 11 of the stator base 10. An axial positioning portion 13 for axial positioning with the iron core plastic coating assembly 9 is also provided on the surface of the mounting post 11 of the stator base 10. The iron core plastic coating assembly 9 is sleeved on the mounting post 11, and the stator base 10 realizes positioning installation with the iron core plastic coating assembly 9 through the radial positioning portion 12 and the axial positioning portion 13.

[0038] Specifically, both the radial positioning portion 12 and the axial positioning portion 13 are convex portions protruding outward from the mounting post 11, and the radial positioning portion 12 and the axial positioning portion 13 are alternately distributed on the outer surface of the mounting post 11. The radial positioning portion 12 and the axial positioning portion 13 adopt a discontinuous structure instead of a continuous structure, which can avoid the problem of low positioning accuracy between the stator base 10 and the iron core plastic-encapsulated component 9 caused by shrinkage deformation during the injection molding of plastic parts, thereby improving the stability of stator installation.

[0039] When the stator base 10 and the iron core plastic-encapsulated component 9 are positioned and installed, the radial positioning portion 12 cooperates with the hole wall of the through hole of the iron core plastic-encapsulated component 9 for radial positioning. And the height of the axial positioning portion 13 is less than the height of the mounting post 11. When the stator base 10 and the iron core plastic-encapsulated component 9 are positioned and installed, the axial positioning portion 13 cooperates with the end of the iron core plastic-encapsulated component 9 for axial positioning.

[0040] The stator of the present utility model further includes bearings 14 and a PCB board 16. Among them, a support bar 15 for supporting the bearings 14 is provided on the inner wall of the mounting post 11, and the two bearings 14 are respectively arranged on the end faces of the ends of the support bar 15. The PCB board 16 is sleeved on the mounting post 11 and is located between the iron core plastic-encapsulated component 9 and the stator base 10.

[0041] The radial positioning portion 12 and the axial positioning portion 13 of the mounting post 11 of the stator base 10 of the present utility model can position the iron core plastic-encapsulated component 9 to achieve positioning and installation, so that the stator base 10 and the iron core plastic-encapsulated component 9 have a good joint effect and accurate positioning, thereby improving the structural stability of the water-pumping motor and the working performance of the water-pumping motor.

[0042] The structure of the rotor in this embodiment is the same as that in Embodiment 1.

[0043] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A rotor, characterized in that: It includes a rotor shell, a motor shell, a magnet and a balancing block; the inner cavity of the rotor shell is provided with a boss, the boss is provided with a plurality of notches, and the number of the balancing blocks is equal to the number of the notches; the notches and the inner cavity side walls of the rotor shell form a filling space, and the balancing block is detachably arranged in the filling space; the motor shell is arranged in the inner cavity of the rotor shell and connected to the boss; the magnet is arranged inside the motor shell.

2. The rotor according to claim 1, characterized in that: The boss is arranged along the bottom edge of the inner cavity of the rotor housing.

3. The rotor according to claim 1, characterized in that: A plurality of notches are distributed along the circumference of the boss.

4. The rotor according to claim 1, characterized in that: The inner cavity side wall of the rotor shell is provided with a plurality of protrusions; the outer side wall of the motor shell abuts against the protrusions.

5. The rotor according to claim 4, characterized in that: The convex block is opposite to the boss area between two adjacent notches.

6. The rotor according to claim 5, characterized in that: The inner cavity side wall and the notch of the rotor housing between two adjacent protrusions are surrounded to form a filling space.

7. The rotor according to claim 4, characterized in that: The upper end surface of the protrusion is a guiding inclined surface for facilitating the installation of the motor housing.

8. A water pumping motor, characterized in that: It comprises a rotor as claimed in any one of claims 1 to 7; the water pumping motor also comprises a stator and a shaft; one end of the shaft extends into the rotor and is connected to the rotor housing, and the other end passes through the stator so that the rotor is rotatably arranged outside the stator.

9. The water pumping motor according to claim 8, characterized in that: The stator comprises an iron core plastic-coated component and a stator seat; the stator seat is provided with a mounting column with a hollow structure; a through hole is provided in the middle of the iron core plastic-coated component, a radial positioning portion is provided on the surface of the mounting column of the stator seat for radial positioning with the through hole, and an axial positioning portion is also provided on the surface of the mounting column of the stator seat for axial positioning with the iron core plastic-coated component; the iron core plastic-coated component is sleeved with the mounting column, and the stator seat is positioned and installed with the iron core plastic-coated component through the radial positioning portion and the axial positioning portion.

10. The water pumping motor according to claim 9, characterized in that: The radial positioning portion and the axial positioning portion are both convex portions of the mounting column protruding outward, and the radial positioning portion and the axial positioning portion are alternately distributed on the outer surface of the mounting column; When the stator seat and the iron core plastic-coated component are positioned and installed, the radial positioning portion cooperates with the hole wall of the through hole of the iron core plastic-coated component for radial positioning; The height of the axial positioning portion is smaller than the height of the mounting column; when the stator seat and the iron core plastic-coated assembly are positioned and installed, the axial positioning portion cooperates with the end of the iron core plastic-coated assembly for axial positioning.

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