Outer rotor direct current brushless motor for washing machine

Abstract

The utility model provides an outer rotor direct current brushless motor for a washing machine, which comprises a shell, a motor shaft is arranged in the shell, a stator support is arranged on the outer side of the motor shaft, a stator iron core is arranged on the stator support, a magnetic ring is sleeved on the outer side of the stator iron core, a circuit board is further arranged on the stator support, and the circuit board is connected with the motor shaft. The lower surface of the stator support is provided with a circle of abutting and buckling plate protruding out of the upper stator support, and the circuit board is provided with a through hole used in cooperation with the abutting and buckling plate. According to the external rotor direct current brushless motor, the circuit board and the stator support are connected in a clamping mode, and the installation mode of the circuit board and the stator support is greatly simplified, so that in actual use, on one hand, the installation efficiency is improved, on the other hand, when the circuit board is damaged, the circuit board can be rapidly taken down, and the service life of the motor is prolonged. And maintenance of the circuit board is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a brushless motor technical field, concretely refers to a outer rotor direct current brushless motor for washing machine. BACKGROUND

[0002] In recent years, with the progress of science and technology in the global green, low carbon, energy saving, environmental protection life development trend increasing under the environment, mini washing machine is more and more popular in the field of family cleaning. Mini washing machine has many advantages, first of all, it is small, can save space, convenient to carry, also can be used anywhere at home. Secondly, its washing effect is also very good, can effectively clean clothes, can also clean household supplies. In addition, its price is cheaper than traditional large washing machine, more easily accepted by consumers. The motor type used in the existing mini washing machine is mostly asynchronous motor, brush motor and outer rotor direct current brushless motor, wherein, the outer rotor direct current brushless motor has the advantages of small size, light weight and low energy consumption, and is widely used.

[0003] As Figures 1-2 As shown in the prior art, the circuit board 3' and the stator support 2' in the outer rotor direct current brushless motor are fixedly connected by screws in turn, and then are jointly installed in the shell 1'. This installation method needs to increase the installation of screws, which increases the process. At the same time, the screws are installed on the back of the circuit board 3' due to the direction, and when the circuit board 3' needs to be replaced or repaired, the circuit board 3' and the stator support 2' need to be disassembled as a whole, which is very troublesome. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides an outer rotor direct current brushless motor for washing machine, which adopts a simpler connection method between the circuit board and the stator support, thereby facilitating the installation and disassembly of the circuit board.

[0005] To solve the above technical problems, the utility model provides an outer rotor direct current brushless motor for washing machine, which comprises a shell, a motor shaft is arranged inside the shell, a stator support is installed on the outer side of the motor shaft, and a circuit board is installed on the stator support, wherein the stator support comprises an integrally formed upper stator support and lower stator support, and the radius of the upper stator support is greater than that of the lower stator support, wherein a lower surface of the upper stator support is provided with a circle of protruding from the upper stator support Latch plate, and a through hole is formed in the circuit board for cooperation with the latch plate.

[0006] Further, the latch plate comprises three axial blocks protruding from the outer surface of the upper stator support and a circle of radial blocks, and a clamping groove is formed in the lower surface of one side of the axial blocks.

[0007] Further, a demolding groove is formed in the radial stopper and communicates with the clamping groove.

[0008] Further, a bolt block is arranged on the axial stopper, and a bolt hole is formed in the bolt block.

[0009] Further, the through hole includes a central hole for passing through the upper stator support and three stopper holes for passing through the bolt block and communicating with the central hole.

[0010] As described above, the outer rotor direct-current brushless motor for the washing machine has the following beneficial effects:

[0011] The outer rotor direct-current brushless motor has the circuit board and the stator support connected through clamping, which greatly simplifies the installation mode of the two, thereby improving the installation efficiency on the one hand and enabling the circuit board to be quickly removed when damaged on the other hand, thereby facilitating the maintenance of the circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a motor in the prior art.

[0013] Figure 2 It is an exploded view of a motor in the prior art.

[0014] Figure 3 It is a structural schematic diagram of a motor according to the present application.

[0015] Figure 4 It is an exploded view of a motor according to the present application.

[0016] Figure 5 It is a structural schematic diagram of a circuit board according to the present application.

[0017] Figure 6 It is a structural schematic diagram of a stator support according to the present application.

[0018] Figure 7 It is another angle structural schematic diagram of a stator support according to the present application.

[0019] In the figure: 1 / 1', housing, 2 / 2', stator support, 3 / 3', circuit board, 4, motor shaft, 5, magnetic ring, 6, stator core, 7, second bearing, 8, first bearing, 9, upper stator support, 10, lower stator support, 11, axial stopper, 12, radial stopper, 13, clamping groove, 14, demolding groove, 15, inclined stopper, 16, bolt block, 17, bolt hole, 18, central hole, 19, stopper hole. DETAILED DESCRIPTION

[0020] The following specific embodiments illustrate the embodiments of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0021] It is understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to understand and read the content disclosed in the specification by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application.

[0022] Referring to Figures 3-7 The present application provides a washing machine with an outer rotor direct current brushless motor, comprising a shell 1, the shell 1 is internally provided with a motor shaft 4, the outer side of the motor shaft 4 is provided with a stator support 2,

[0023] The stator support 2 is provided with a circuit board 3, wherein the stator support 2 comprises an integrally formed upper stator support 9 and a lower stator support 10, wherein the upper stator support 9 is located outside the shell 1, the lower stator support 10 is located inside the shell 1, and the radius of the upper stator support 9 is greater than the radius of the lower stator support 10, the first bearing 8 is installed in the upper stator support 9, the second bearing 7 is installed in the lower stator support 10, and the stator support 2 is rotatably connected with the motor shaft 4 through the first bearing 8 and the second bearing 7; and the outer diameter of the first bearing 8 is greater than the outer diameter of the second bearing 7.

[0024] The stator support 2 is provided with a circuit board 3 and a stator core 6, specifically, the circuit board 3 is installed on the upper stator support 9, the stator core 6 is sleeved on the lower stator support 10, and the outer side of the stator core 6 is sleeved with a magnetic ring 5 fixedly installed on the inner surface of the shell 1, and the stator core 6 and the magnetic ring 5 are installed in the interior of the shell 1.

[0025] Wherein, the circuit board 3 is installed on the lower stator support 10, the outer surface of the upper stator support 9 is provided with a deduction plate protruding from the outer surface of the upper stator support 9, and the circuit board 3 is provided with a through hole matched with the deduction plate.

[0026] Specifically, the abutting plate comprises three axial blocks 11 protruding from the outer surface of the upper stator support 9 and a ring of radial blocks 12, the bottom surface of the axial blocks 11 is connected with the top surface of the radial blocks 12, and the thickness of the axial blocks 11 and the radial blocks 12 is the same. Meanwhile, one side of the lower bottom surface of the axial blocks 11 is provided with a clamping groove 13, and the other side of the lower bottom surface of the axial blocks 11 is provided with an inclined block 15.

[0027] In this embodiment, the axial blocks 11 and the radial blocks 12 are integrally formed with the upper stator support 9, and the angle distance between every two of the three axial blocks 11 is the same.

[0028] The height of the clamping groove 13 is less than the height of the circuit board 3, so that the circuit board 3 is clamped into the clamping groove 13 and is in interference fit with the clamping groove 13. However, on the one hand, the interference fit is not high, and on the other hand, the circuit board 3 and the clamping groove 13 are not provided with a circuit, so that the circuit board 3 and the internal circuit are not affected and cannot be used.

[0029] Meanwhile, the side of the clamping groove 13 away from the axial block 11 is provided with a chamfer, which facilitates the clamping of the circuit board into the clamping groove 13.

[0030] Meanwhile, the radial block 12 is provided with a demolding groove 14 in communication with the clamping groove, so that the product can be easily demolded after molding, and the structure of the mold can be simplified.

[0031] In this embodiment, the axial block 11 is provided with a bolt block, and the axial block 11 and the bolt hole 1716 are integrally formed, the bolt hole 1716 is provided on the bolt block, and the connection between the outer rotor direct current brushless motor and the washing machine is facilitated through the bolt hole 1716.

[0032] Meanwhile, the through hole comprises a center hole 18 for passing through the upper stator support 9 and three block holes 19 for passing through the bolt block in communication with the center hole 18, and the radius of the center hole 18 is the same as that of the upper stator support 9.

[0033] In order to prevent the circuit board 3 from being pulled out of the clamping groove 13 during use, the clamping groove 13 is provided with a layer of adhesive layer, so that after the circuit board 3 is clamped into the clamping groove 13, the two can be fixed by adhesive, and the connection strength between the two is further improved.

[0034] In specific use, after the stator support 2 is installed, the circuit board 3 is passed through the through hole from top to bottom through the upper stator support 9, and due to the blocking of the radial stopper 12, the circuit board 3 is stopped on the upper stator support 9, then the circuit board 3 is rotated towards the clamping groove 13, and through interference fit and the blocking of the inclined stopper 15, the circuit board 3 is clamped into the clamping groove 13, thereby forming quick installation of the circuit board 3.

[0035] The above embodiment only illustrates the principle and effect of the present application, and is not used to limit the present application. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A brushless DC motor with an external rotor for a washing machine, characterized in that: The device includes a housing, inside which a motor shaft is installed, and on the outside of the motor shaft a stator bracket is installed. A stator core is installed on the stator bracket, and a magnetic ring is fitted on the outside of the stator core. A circuit board is also installed on the stator bracket, and a retaining plate protruding from the upper stator bracket is provided on the lower surface of the stator bracket. The circuit board has through holes that cooperate with the retaining plate.

2. The external rotor DC brushless motor for a washing machine according to claim 1, characterized in that: The stator support includes an integrally formed upper stator support and a lower stator support, and the radius of the upper stator support is larger than that of the lower stator support. The outer surface of the upper stator support is provided with a ring of buckle plates protruding from the upper stator support, and the circuit board is provided with through holes that cooperate with the buckle plates.

3. The external rotor DC brushless motor for a washing machine according to claim 2, characterized in that: The buckle plate includes three axial blocks protruding from the outer surface of the upper stator bracket and a ring of radial blocks, and a snap-fit ​​groove is formed on one side of the lower surface of the axial blocks.

4. The external rotor DC brushless motor for a washing machine according to claim 3, characterized in that: The axial stop and the radial stop are integrally formed with the upper stator support.

5. The external rotor DC brushless motor for a washing machine according to claim 3, characterized in that: The radial stop has a demolding groove that communicates with the snap-fit ​​groove.

6. The external rotor DC brushless motor for a washing machine according to claim 3, characterized in that: The axial stop block is provided with a bolt block, and the bolt block is provided with a bolt hole.

7. A brushless DC motor for a washing machine with an external rotor according to claim 6, characterized in that: The through hole includes a central hole for passing through the upper stator support and three stop holes communicating with the central hole for passing through bolt blocks.

8. A brushless DC motor for a washing machine according to claim 7, characterized in that: The radius of the central hole is the same as the radius of the upper stator support.

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