Brushless direct current motor for washing machine

Abstract

The utility model provides a brushless direct-current motor for a washing machine, which belongs to the technical field of washing machines, overcomes the defect of high cost of a direct-drive motor of an existing pulsator washing machine, and comprises a stator, a mounting hole for connecting and mounting the stator is arranged on the stator, a rotor is concentrically arranged outside the stator, and the rotor is provided with a rotor shaft. The motor is characterized in that the periphery of the mounting hole of the stator is provided with a circle of boss, the end face of one side outside the mounting base comprising the mounting hole is provided with a common terminal seat, and the outer surface of the mounting base is also provided with a concave notch which is concave inwards, so that the stability of mounting is improved through the arrangement of the boss, the concave notch and the common terminal seat, and the service life of the motor is prolonged. According to the technical scheme, potential safety hazards of the wire harness are reduced, the working efficiency of the motor is integrally improved, the thickness of the iron core and the heights of the magnetic shoe and the magnetic conduction ring can be properly reduced, the height size of the motor can be effectively reduced, the production cost can be reduced, and the marketization requirement can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of washing machines, and particularly relates to a brushless DC motor for a washing machine. Background Art

[0002] In existing pulsator washing machines, direct drive motors are gradually being used to replace AC motors, which not only improves the efficiency of the motor, but also reduces the noise of the motor and increases the service life of the motor.

[0003] However, the cost of brushless DC motors is relatively high, and it is difficult to reduce the overall cost of washing machines in the face of market demand. The high cost of motors is also a link that needs to be overcome in the face of market demand. How to reduce motor costs by improving motor efficiency is a technical problem that we urgently need to solve. Utility Model Content

[0004] The purpose of the utility model is to provide a brushless DC motor for a washing machine to solve the above technical problems existing in the prior art.

[0005] According to the above purpose, the basic technical scheme of the utility model is: a brushless DC motor for a washing machine, including a stator, a mounting hole for connecting and mounting the stator is provided on the stator, and a concentrically arranged rotor is provided on the outside of the stator, characterized in that a circle of bosses is provided around the mounting hole of the stator, a common terminal seat is provided on the end surface of one side outside the mounting base including the mounting hole, and an inwardly recessed notch is also provided on the outer surface of the mounting base.

[0006] Furthermore, the notch is arranged in a trapezoidal shape with a small inner portion and a large outer portion.

[0007] Furthermore, the recesses are evenly spaced from the circumference of the mounting hole.

[0008] Furthermore, positioning columns are evenly spaced between the mounting holes.

[0009] In the brushless DC motor for washing machine, the common terminal seat, the recess and the positioning column are integrally formed by injection molding.

[0010] Furthermore, an injection-molded integral wire socket is provided on an outer end surface of the mounting base.

[0011] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0012] 1. The utility model improves the installation flatness of the motor by providing a circle of bosses around the mounting hole, avoids the installation error caused by the unevenness of the overall mounting seat, and improves the stability of the installation;

[0013] 2. The utility model product is provided with a common terminal seat outside the installation base, eliminating the need for heat shrink tubing for wrapping the wiring terminals, which not only unclutters the connection ports but also reduces the potential safety hazards of the wiring harness;

[0014] 3. The outer surface of the mounting base of the utility model product is provided with a notch, which improves the overall rigidity of the mounting base;

[0015] 4. The utility model product improves the overall working efficiency of the motor by setting bosses, recesses and common terminal seats, and can appropriately reduce the thickness of the iron core, as well as the height of the magnetic tiles and magnetic rings. It can not only effectively reduce the height size of the motor, but also reduce the production cost to meet market needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model product;

[0017] Figure 2 This is a front view structural diagram of the utility model product;

[0018] Figure 3 for Figure 2 AA cross-sectional structural diagram;

[0019] Figure 4 This is a first three-dimensional structural schematic diagram of the stator of the utility model product;

[0020] Figure 5 This is a second three-dimensional structural schematic diagram of the stator of the utility model product;

[0021] In the figure: 1. stator; 2. rotor; 3. mounting hole; 4. common terminal seat; 5. boss; 6. recess; 7. iron core; 8. magnetic ring; 9. positioning column. DETAILED DESCRIPTION

[0022] Combination Figures 1 to 5 , is a schematic diagram of the principle structure of an embodiment of a brushless DC motor for a washing machine of the utility model, the brushless DC motor for a washing machine comprises a stator 1, the stator 1 is provided with a mounting hole 3 for connecting and mounting the stator 1, the outside of the stator 1 is provided with a concentrically arranged rotor 2, the mounting hole 3 of the stator 1 is surrounded by a circle of bosses 5, and a common terminal seat 4 is provided on the end surface of one side outside the mounting base including the mounting hole 3, which overcomes the problem that the terminals of the old products are wrapped with heat shrink tubes, and three are stacked together, which is not only ugly, but also needs to be wrapped with a cable tie to affect the overall placement, and an inwardly recessed notch 6 is also provided on the outer surface of the mounting base, and the notch 6 is arranged in a trapezoidal shape with a small inside and a large outside. Specifically, the notch 6 is evenly spaced from the circumference of the mounting hole 3.

[0023] An iron core 7 is provided on the outer periphery of the mounting base, a coil is wound on the iron core 7, a magnetic tile is provided on the rotor 2 facing the iron core, a magnetic conductive ring 8 is provided on the outer periphery of the magnetic tile, and the magnetic tile, the magnetic conductive ring 8 and the rotor rotating shaft connector are injection molded together.

[0024] In order to increase the concentricity and convenience of installation with the washing machine clutch, positioning columns 9 are evenly spaced between the mounting holes 3. In this embodiment, there are 6 mounting holes, 3 mounting columns, and 2 recesses 6. Originally, 3 could be set, but due to the need to make way for the control components of the clutch, a notch is provided on one side of the mounting base. Due to the setting of the notch, the recess 6 originally belonging to this position is gone, so there are only 2 in total.

[0025] In the brushless DC motor for washing machine, the common terminal seat 4, boss 5, recess 6 and positioning column 9 are integrally formed by injection molding. The common terminal seat 4 is provided for connecting the common connection port of the three windings. In order to improve the strength of the stator mounting base, reinforcing ribs are provided on the reverse side of the mounting during injection molding, and the rib surface is flush with the reverse sides of the boss 5, recess 6 and positioning column 9.

[0026] In order to further improve the convenience of plugging in the plug wires, an injection-molded plug wire socket is also provided on the connecting surface on the other side of the mounting base facing the notch. The plug wire socket has three jacks corresponding to the U, V, and W phase line terminal sockets respectively.

[0027] The utility model product improves the overall working efficiency of the motor by setting the boss 5, the recess 6 and the common terminal seat 4, and can appropriately reduce the thickness of the iron core 7 from 18mm to 15mm, as well as the height of the magnetic tile and the magnetic guide ring 8. The thickness of the magnetic tile: the old product is 22.5mm, the new product is 21mm; the thickness of the magnetic guide ring: the old product is 22.5mm, the new product is 21mm; not only can it effectively reduce the height size of the motor, but also can effectively reduce the production cost to meet the needs of the market.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0029] Although the following terms are frequently used in this article: 1. stator; 2. rotor; 3. mounting hole; 4. common terminal seat; 5. boss; 6. recess; 7. iron core; 8. magnetic conductor; 9. positioning column, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

[0030] The brushless DC motor for washing machines provided by the present invention is introduced above. The principle and implementation mode of the present invention are explained by using specific preferred embodiments. These embodiments are only used to help understand the principle and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the design idea of ​​the present invention, the implementation schemes in the above embodiments can be further combined or replaced, and the present invention can be improved and modified in a number of ways. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A brushless DC motor for a washing machine, comprising a stator (1), wherein the stator (1) is provided with a mounting hole (3) for connecting and mounting the stator (1), and a rotor (2) is concentrically arranged outside the stator (1), characterized in that: A circle of bosses (5) is provided around the mounting hole (3) of the stator (1), and a common terminal seat (4) is provided on one end surface outside the mounting base of the mounting hole (3), and an inwardly recessed notch (6) is also provided on the outer surface of the mounting base.

2. The brushless DC motor for washing machine according to claim 1, characterized in that: The recess (6) is arranged in a trapezoidal shape with a small inner portion and a large outer portion.

3. The brushless DC motor for washing machine according to claim 2, characterized in that: The recesses (6) and the mounting holes (3) are evenly spaced around the circumference.

4. The brushless DC motor for a washing machine according to claim 1, characterized in that: Positioning columns (9) are evenly spaced between the mounting holes (3).

5. The brushless DC motor for a washing machine according to any one of claims 1 to 4, characterized in that: The common terminal seat (4), the recess (6) and the positioning column (9) are integrally formed by injection molding.

6. The brushless DC motor for a washing machine according to claim 5, characterized in that: An injection-molded integral wire socket is also provided on an outer end surface of the mounting base.

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