Permanent magnet direct current brushless motor for pulsator washing machine

Abstract

The permanent magnet brushless direct current motor comprises a rotor and a stator, the stator comprises an end shell, silicon steel sheets and permanent magnets, the silicon steel sheets are arranged in a laminated mode, a rotating space is formed in the middle of each silicon steel sheet, caulking grooves are formed in the silicon steel sheets, the permanent magnets are arranged in the caulking grooves, and the permanent magnets are arranged in the caulking grooves. The end shells are fixedly connected to the two ends of the silicon steel sheet respectively, the end shells are divided into the upper shell and the lower shell, one of the upper shell and the lower shell is provided with a fixing plate extending transversely, and the fixing plate and a washing machine base structure are fixedly installed. Different end shell structures are arranged, the fixing plates are integrally arranged on the end shells, the permanent magnet brushless direct current motor is fixed to the washing machine through connection of the fixing plates, the permanent magnet brushless direct current motor can be arranged on the end shell on the side according to the height position needing to be installed, the adaptability to the installation position is good, the structure of the permanent magnet motor is adopted, and the service life of the permanent magnet brushless direct current motor is prolonged. The motor is high in starting efficiency and meets the working requirements of the pulsator washing machine.

Description

Technical Field

[0001] The utility model relates to an improved structure of a motor for a washing machine, in particular to a permanent magnet DC brushless motor for a pulsator washing machine. Background Art

[0002] The motor in a pulsator washing machine is a power structure used to drive the pulsator. The pulsator is a washing rotating structure with an opening on the top. The overall rotation of the pulsator generates agitation of the water and produces washing force on the clothes. The bottom of the pulsator is connected to a power device. The main power output structure of the power device is the motor. Due to the large size of the pulsator, the frequency of its reciprocating rotation is relatively high, the torque requirements for the motor are large, and it needs to be resistant to vibration. Therefore, this design considers using a permanent magnet DC brushless motor and improving its fixed structure accordingly to adapt to the working environment of the washing machine. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a permanent magnet DC brushless motor for a pulsator washing machine.

[0004] The technical solution adopted by the utility model to solve the above problems is: the permanent magnet brushless DC motor includes a rotor and a stator, the stator includes an end shell, a silicon steel sheet, and a permanent magnet, the silicon steel sheet is stacked and has a rotation space in the middle, an embedding groove is provided on the silicon steel sheet, a permanent magnet is provided in the embedding groove, the end shells are fixedly connected at both ends of the silicon steel sheet, the end shell is divided into an upper shell and a lower shell, one of the upper shell and the lower shell is provided with a horizontally extending fixed plate, and the fixed plate is fixedly installed with the basic structure of the washing machine. By setting different end shell structures, a fixed plate is integrally provided on the end shell, and the permanent magnet brushless DC motor is fixed on the washing machine through the connection of the fixed plate, and the end shell on the side where the permanent magnet brushless DC motor is installed can be selected according to the height position of the installation as needed, and the adaptability to the installation position is good, and the structure of the permanent magnet motor is adopted, the starting efficiency of the motor is high, and it meets the working needs of the pulsator washing machine.

[0005] Furthermore, the upper shell and the lower shell are both formed into a cover shell structure by pressing a metal plate, and a connecting edge is formed on the edge of the cover shell, and the connecting edge contacts the end surface of the silicon steel sheet and is fixed by a fixing member. The upper shell and the lower shell are both processed into a shell structure with uniform thickness by stamping as the end shell structure, and the connection reliability of the overall structure is good, and the noise generated by the working vibration of the motor is avoided.

[0006] Furthermore, the connecting edge extends to the outer end to form a fixed plate, and the fixed plate is horizontally formed based on the connecting edge. The end edge of the fixed plate is bent to form a reinforcing edge, and the reinforcing edge is set at a right angle to the body of the fixed plate. A reinforcing recess is also pressed on the surface of the fixed plate, and the reinforcing recess is extended on the plane part of the fixed plate. A mounting hole is also set on the fixed plate. The fixed plate is an integrated structure with the end shell, which is convenient for positioning and installation, and has a high space utilization rate. The reinforcing edge of the edge of the fixed plate can prevent the fixed plate from bending and deformation, and the reinforcing recess can prevent the fixed plate from bending, and the overall fixing stability is good.

[0007] Furthermore, the reinforcing edge, reinforcing recess and mounting hole are integrally formed during the processing of the end shell. The structure on the fixing plate is integrally formed during the stamping sheet metal processing, which can reduce stress and avoid deformation during use.

[0008] Furthermore, the surfaces of the upper shell and the lower shell are both provided with connecting holes, which penetrate the surfaces of the upper shell and the lower shell and communicate with the air gap space in the motor. The connecting holes can communicate the space inside and outside the motor, which is beneficial to the heat dissipation of the motor, avoid the motor working under high temperature and high load, and extend the working life of the motor.

[0009] Compared with the prior art, the utility model has the following advantages and effects: the design is a structural improvement of a motor for a washing machine, which applies a permanent magnet brushless DC motor to the structure of a pulsator washing machine, adapts to the repeated reversing working mode of the pulsator washing machine, has a simple and reliable motor fixing structure, efficiently utilizes the space structure, and reduces the impact of vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of this motor.

[0011] Figure 2 It is a schematic diagram of the structure of the end shell without a fixing plate.

[0012] Figure 3 It is a schematic diagram of the structure of the end shell with a fixing plate.

[0013] In the figure: 1. rotor, 2. stator, 3. end shell, 4. silicon steel sheet, 5. upper shell, 6. lower shell, 7. fixing plate, 8. connecting edge, 9. reinforcement edge, 10. reinforcement recess, 11. mounting hole, 12. connecting hole. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0015] A permanent magnet brushless DC motor for a pulsator washing machine, the permanent magnet brushless DC motor comprises a rotor 1 and a stator 2, the stator 2 comprises an end shell 3, a silicon steel sheet 4, and a permanent magnet, the silicon steel sheet 4 is stacked and has a rotation space in the middle, an embedding groove is provided on the silicon steel sheet 4, a permanent magnet is provided in the embedding groove, the end shell 3 is fixedly connected at both ends of the silicon steel sheet 4, the end shell 3 is divided into an upper shell 5 and a lower shell 6, one of the upper shell 5 and the lower shell 6 is provided with a transversely extending fixing plate 7, and the fixing plate 7 is fixedly installed with the basic structure of the washing machine.

[0016] The upper shell 5 and the lower shell 6 are both formed into a housing structure by pressing metal plates, and a connecting edge 8 is formed on the edge of the housing, and the connecting edge 8 contacts the end surface of the silicon steel sheet 4 and is fixed by a fixing piece.

[0017] The connecting edge 8 extends outward to form a fixing plate 7, and the fixing plate 7 is horizontally formed based on the connecting edge 8. The end edge of the fixing plate 7 is bent to form a reinforcing edge 9, and the reinforcing edge 9 is arranged at a right angle to the body of the fixing plate 7. A reinforcing recess 10 is also pressed and formed on the surface of the fixing plate 7. The reinforcing recess 10 is extended in the plane part of the fixing plate 7, and a mounting hole 11 is also arranged on the fixing plate 7.

[0018] The reinforcement edge 9 , the reinforcement recess 10 , and the mounting hole 11 are integrally pressed and formed during the processing of the end shell 3 .

[0019] The surfaces of the upper shell 5 and the lower shell 6 are both provided with a communication hole 12 , which passes through the surfaces of the upper shell 5 and the lower shell 6 and communicates with the air gap space in the motor.

[0020] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary rather than restrictive. The scope of the present invention is defined by the claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim involved.

[0021] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A permanent magnet brushless DC motor for a pulsator washing machine, characterized in that: A permanent magnet brushless DC motor comprises a rotor (1) and a stator (2), wherein the stator (2) comprises an end shell (3), a silicon steel sheet (4), and a permanent magnet. The silicon steel sheet (4) is stacked and has a rotation space in the middle thereof. An embedding groove is provided on the silicon steel sheet (4), and the permanent magnet is provided in the embedding groove. The end shell (3) is fixedly connected to both ends of the silicon steel sheet (4), respectively. The end shell (3) is divided into an upper shell (5) and a lower shell (6). Either the upper shell (5) or the lower shell (6) is provided with a transversely extending fixing plate (7), and the fixing plate (7) is fixedly installed with a washing machine base structure.

2. The permanent magnet brushless DC motor for a pulsator washing machine according to claim 1, characterized in that: The upper shell (5) and the lower shell (6) are both formed into a cover structure by pressing metal plates, and a connecting edge (8) is formed on the edge of the cover, and the connecting edge (8) is in contact with the end surface of the silicon steel sheet (4) and is fixed by a fixing piece.

3. The permanent magnet brushless DC motor for a pulsator washing machine according to claim 2, characterized in that: The connecting edge (8) extends outward to form a fixing plate (7), the fixing plate (7) is horizontally formed based on the connecting edge (8), the end edge of the fixing plate (7) is bent to form a reinforcing edge (9), the reinforcing edge (9) and the body of the fixing plate (7) are arranged at a right angle, a reinforcing recess (10) is also pressed and formed on the surface of the fixing plate (7), the reinforcing recess (10) is extended on the plane part of the fixing plate (7), and a mounting hole (11) is also arranged on the fixing plate (7).

4. The permanent magnet brushless DC motor for a pulsator washing machine according to claim 3, characterized in that: The reinforcing edge (9), the reinforcing recess (10) and the mounting hole (11) are integrally pressed and formed during the processing of the end shell (3).

5. The permanent magnet brushless DC motor for a pulsator washing machine according to claim 1, characterized in that: The surfaces of the upper shell (5) and the lower shell (6) are both provided with a communication hole (12), and the communication hole (12) passes through the surfaces of the upper shell (5) and the lower shell (6) and communicates with the air gap space in the motor.

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