Novel rotor assembly for improving heat dissipation of induction motor for washing machine

Abstract

The utility model discloses a novel rotor assembly for improving heat dissipation of an induction motor for a washing machine, which comprises an upper end cover, a lower end cover and a rotating shaft, a stator is longitudinally and coaxially arranged between the upper end cover and the lower end cover, and a rotor is arranged in the stator. The rotating shaft is arranged on a longitudinal shaft of the rotor in a penetrating mode and fixed to the axis of the upper end cover and the axis of the lower end cover through an upper bearing and a lower bearing, the rotating shaft and the stator move synchronously, and knurls are arranged on the outer portion of the section, located between the upper bearing and the rotor, of the rotating shaft. A fan is arranged on the periphery of the knurling, and an air outlet of the fan is arranged opposite to a winding of the stator in an inclined mode. Through the optimized and improved design of the product, the temperature rise of the motor of the washing machine is reduced, the motor stacking of the traditional washing machine is reduced, and the beneficial effects of reducing the manufacturing cost and the manufacturing difficulty of the motor are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor assemblies, and more specifically, to a novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. Background Art

[0002] A washing machine is a cleaning appliance that uses electric energy to generate mechanical action to wash clothes, and its development process and technological innovation have witnessed the improvement of the quality of human life.

[0003] Since the capacity of existing washing machines is continuously increasing, in order to meet the temperature rise of the washing machine motor, in the motor design, it is necessary to continuously increase the shape and stacking height of the motor, or improve the heat dissipation ability of the motor itself; because the space left for the motor in the washing machine is limited, when the shape and stacking height of the washing machine increase to a certain height, only by improving the heat dissipation of the motor itself can the temperature rise requirement be met. Summary of the Utility Model

[0004] In view of the above technical problems in the related art, the present utility model proposes a novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine, which can overcome the above deficiencies of the prior art.

[0005] To achieve the above technical objectives, the technical solution of the present utility model is realized as follows:

[0006] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine;

[0007] The novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine includes an upper end cover, a lower end cover and a rotating shaft. A stator is longitudinally coaxially arranged between the upper end cover and the lower end cover. A rotor is arranged inside the stator. The rotating shaft passes through the longitudinal axis of the rotor and is fixed at the centers of the upper end cover and the lower end cover through an upper bearing and a lower bearing, and moves synchronously with the rotor. Knurling is provided on the outer part of the section of the rotating shaft between the upper bearing and the rotor. A fan is provided on the periphery of the knurling, and the air outlet of the fan is obliquely opposite to the winding of the stator.

[0008] Further, the fan includes a plurality of fan blades, and the fan blades are mixed-flow type fan blades.

[0009] Further, the outer diameter of the rotating shaft is 12.16 + 0.03 mm, the inner diameter of the fan is 12.1 + 0.05 mm, and the fan is arranged at the knurling of the rotating shaft in an interference fit manner.

[0010] Further, the depth of the upper end cover is H1, and the size range of the depth H1 of the upper end cover is 33 - 42.5 mm.

[0011] Further, the height of the fan is H2, and the size range of the height H2 of the fan is 17 - 25 mm.

[0012] Further, the fan blade is an elliptical small semi - circle, and the thickness of the fan blade is 1 - 3 mm.

[0013] Further, the inner hole of the stator is D1, and the size of the inner hole D1 of the stator is 60 - 68 mm.

[0014] Further, the maximum outer - circle size of the fan blade is D2, and the maximum outer - circle size D2 of the fan blade is the inner hole D1 of the stator minus 3 mm.

[0015] The beneficial effects of the present utility model: Through the optimized and improved design of the products of the present utility model, the temperature rise of the washing machine motor is reduced, the stack height of the motors used in traditional washing machines is reduced, and further the beneficial effects of reducing the manufacturing cost and the manufacturing difficulty of the motor are achieved. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a sectional view of the fan blade and the motor structure of a new rotor assembly for improving the heat dissipation of an induction motor for a washing machine according to an embodiment of the present utility model;

[0018] Figure 2 It is a sectional view of the fan blade and the motor structure of an induction motor for a traditional washing machine according to an embodiment of the present utility model;

[0019] Figure 3 It is a three - dimensional view of the traditional rotor and the traditional fan blade of a traditional washing machine motor according to an embodiment of the present utility model;

[0020] Figure 4 It is a three - dimensional view of the upper end - cover of a new rotor assembly for improving the heat dissipation of an induction motor for a washing machine according to an embodiment of the present utility model;

[0021] Figure 5 It is a three - dimensional view of the lower end - cover of a new rotor assembly for improving the heat dissipation of an induction motor for a washing machine according to an embodiment of the present utility model;

[0022] Figure 6 It is a three - dimensional view of the rotating shaft of a new rotor assembly for improving the heat dissipation of an induction motor for a washing machine according to an embodiment of the present utility model;

[0023] Figure 7 It is the front view of the fan of a new rotor assembly for improving the heat dissipation of the induction motor used in washing machines according to the embodiments of the present invention;

[0024] Figure 8 It is the top view of the fan of a new rotor assembly for improving the heat dissipation of the induction motor used in washing machines according to the embodiments of the present invention;

[0025] Figure 9 It is the perspective view of the fan of a new rotor assembly for improving the heat dissipation of the induction motor used in washing machines according to the embodiments of the present invention;

[0026] In the figure: 1. upper end cover; 2. lower end cover; 3. stator; 4. rotor; 5. rotating shaft; 6. upper bearing; 7. lower bearing; 8. fan; 9. fan blade; 10. traditional rotor; 11. traditional fan blade; 12. knurling. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0028] It should be understood that in the description of the embodiments of the present invention, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention 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 thus cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "several" means two or more unless otherwise specifically defined.

[0029] Such as Figure 1 And Figures 4 - 9As shown, a novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine according to an embodiment of the present invention includes an upper end cover 1, a lower end cover 2, and a rotating shaft 5. A stator 3 is longitudinally coaxially provided between the upper end cover 1 and the lower end cover 2. A rotor 4 is provided inside the stator 3. The rotating shaft 5 passes through the longitudinal axis of the rotor 4 and is fixed at the axis centers of the upper end cover 1 and the lower end cover 2 through an upper bearing 6 and a lower bearing 7, and moves synchronously with the rotor 4. Knurling 12 is provided outside the section of the rotating shaft 5 between the upper bearing 6 and the rotor 4. A fan 8 is provided outside the knurling 12, and the air outlet of the fan 8 is obliquely opposite to the winding of the stator 3.

[0030] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. In a specific embodiment, the fan 8 includes a plurality of fan blades 9, and the fan blades 9 are mixed-flow type fan blades.

[0031] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. In a specific embodiment, the outer diameter of the rotating shaft 5 is 12.16 + 0.03 mm, the inner diameter of the fan 8 is 12.1 + 0.05 mm, and the fan 8 is arranged at the knurling 12 of the rotating shaft 5 in an interference fit manner.

[0032] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. In a specific embodiment, the depth of the upper end cover 1 is H1, and the size range of the depth H1 of the upper end cover 1 is 33 - 42.5 mm.

[0033] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. In a specific embodiment, the height of the fan 8 is H2, and the size range of the height H2 of the fan 8 is 17 - 25 mm.

[0034] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. In a specific embodiment, the fan blades 9 are small semi-elliptical, and the thickness of the fan blades 9 is 1 - 3 mm.

[0035] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. In a specific embodiment, the inner diameter of the stator 3 is D1, and the size of the inner diameter D1 of the stator 3 is 60 - 68 mm.

[0036] A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine. In a specific embodiment, the maximum outer diameter of the fan blades 9 is D2, and the maximum outer diameter D2 of the fan blades 9 is the inner diameter D1 of the stator 3 minus 3 mm.

[0037] To facilitate the understanding of the above technical solution of the present invention, the above technical solution of the present invention will be described in detail below in terms of specific usage methods.

[0038] In specific use, according to the novel rotor assembly for improving the heat dissipation of the induction motor for a washing machine described in the utility model, knurling 12 is added to the rotating shaft 5 inside the motor, and a fan 8 is added in an interference fit manner (compared with the traditional fan blades 11 of the original traditional rotor 10, the fan 8 is thinner, and the larger the fan blades, the greater the air volume), replacing the technical solution of the traditional fan blades 11 on the traditional rotor 10. The fan 8 of the utility model is a mixed flow fan, and the air outlet of the fan 8 is directly oblique to the winding of the stator 3. This design can improve the heat dissipation performance of the motor winding, thereby reducing the temperature rise of the motor.

[0039] Specifically, knurling 12 is added to the rotating shaft 5, the outer diameter of the rotating shaft 5 is controlled at 12.16+0.03, the inner diameter of the fan 8 is controlled at 12.1+0.05, and the fan 8 can be fixed on the rotating shaft 5 through interference fit. The fan 8 added inside the induction motor for the washing machine is a mixed flow type fan blade 9; the depth H1 of the upper end cover 1 ranges from 33 to 42.5 mm, the height of the fan 8 ranges from H2, and the size of H2 ranges from 17 to 25 mm; the thickness of the fan blade 9 is 1 to 3 mm; the appearance of the fan blade 9 is an elliptical semicircle; the inner hole D of the stator 3 is 60 to 68 mm, and the maximum outer diameter of the fan blade 9 is D2, and D2 is equal to the inner hole D1 of the stator 3 minus 3 mm.

[0040] To sum up, with the help of the above technical solution of the utility model, through the optimization and improvement design of the product of the utility model, the temperature rise of the washing machine motor can be reduced, the stacking height of the motor used in the traditional washing machine is reduced, thereby achieving the beneficial effect of reducing the manufacturing cost and the difficulty of motor manufacturing.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine, characterized in that, It includes an upper end cover (1), a lower end cover (2) and a rotating shaft (5). A stator (3) is longitudinally coaxially arranged between the upper end cover (1) and the lower end cover (2). A rotor (4) is arranged inside the stator (3). The rotating shaft (5) passes through the longitudinal axis of the rotor (4) and is fixed at the centers of the upper end cover (1) and the lower end cover (2) through an upper bearing (6) and a lower bearing (7), and moves synchronously with the rotor (4). Knurling (12) is arranged outside the section between the upper bearing (6) and the rotor (4) of the rotating shaft (5). A fan (8) is arranged around the knurling (12), and the air outlet of the fan (8) is obliquely opposite to the winding of the stator (3).

2. The novel rotor assembly for enhancing the heat dissipation of an induction motor used in a washing machine according to claim 1, wherein, The fan (8) includes a plurality of fan blades (9), and the fan blades (9) are mixed-flow type fan blades.

3. A novel rotor assembly for enhancing the heat dissipation of an induction motor used in a washing machine according to claim 1, characterized in that, The outer diameter of the rotating shaft (5) is 12.16 + 0.03 mm, the inner diameter of the fan (8) is 12.1 + 0.05 mm, and the fan (8) is arranged at the knurling (12) of the rotating shaft (5) in an interference fit manner.

4. A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine according to claim 1, characterized in that, The depth of the upper end cover (1) is H1, and the dimension range of the depth H1 of the upper end cover (1) is 33 - 42.5 mm.

5. A novel rotor assembly for enhancing the heat dissipation of an induction motor used in a washing machine according to claim 4, characterized in that, The height of the fan (8) is H2, and the dimension range of the height H2 of the fan (8) is 17 - 25 mm.

6. A novel rotor assembly for enhancing the heat dissipation of an induction motor used in a washing machine according to claim 2, characterized in that, The fan blade (9) is an ellipse small semi-circle, and the thickness of the fan blade (9) is 1 - 3 mm.

7. A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine according to claim 2, characterized in that, The inner diameter of the stator (3) is D1, and the dimension of the inner diameter D1 of the stator (3) is 60 - 68 mm.

8. A novel rotor assembly for improving the heat dissipation of an induction motor used in a washing machine according to claim 7, characterized in that, The maximum outer diameter of the fan blade (9) is D2, and the maximum outer diameter D2 of the fan blade (9) is the inner diameter D1 of the stator (3) minus 3 mm.

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