Motor for small washing machine

Abstract

The utility model discloses a motor for a small washing machine, which comprises a driving plate, a stator shell and a stator arranged on the stator shell, the driving plate is fixed on the stator shell, a Hall sensor is fixed on the end face of the driving plate facing the stator shell, a fixing area is arranged on the outer side of the stator shell, and the Hall sensor is arranged in the fixing area. And an accommodating groove for accommodating the Hall sensor is formed in the fixed area. The brushless motor has the advantage that the problem that the thickness of the motor is increased due to the fact that the Hall element on the drive board of the brushless motor is too high is solved. The Hall sensor is installed on the end face, facing the stator shell, of the driving plate, so that the Hall sensor can extend into the containing groove, the driving plate can be closer to the surface of the stator shell, the distance between the driving plate and the surface of the stator shell is shortened, the thickness of the motor is reduced, the Hall sensor can be protected through the containing groove, and the service life of the motor is prolonged. The Hall sensor can be closer to the stator and the rotor, the use scene of a small washing machine is better met, and the size of the washing machine is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a motor for a small washing machine. Background Art

[0002] In order to wash clothes more hygienically, many underwear washing machines are now available on the market. Since they are used to wash small items and are mostly the second washing machine in the home, the washing machine needs to be as small as possible to reduce the space occupied by the washing machine. The size of the drum is basically fixed, and the only way to make the washing machine thin and light is to make the motor thin. The Hall sensor is an important component of the brushless motor. Generally, the brushless motor installs the Hall sensor in the stator slot. However, due to the special working environment of the washing machine, the exposed Hall sensor is easily corroded by water vapor. Therefore, after the improvement, the Hall sensor is fixed on the circuit board of the motor, and the circuit board is fixed on the outside of the stator shell. However, the Hall element has a certain height, so the driver board has to protrude a certain height, which increases the thickness of the motor. Utility Model Content

[0003] The utility model aims to provide a motor for a small washing machine, which can effectively solve the problem that the Hall element on the driving board of the existing brushless motor is too high, resulting in an increase in the thickness of the motor.

[0004] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0005] A motor for a small washing machine comprises a drive plate, a stator shell and a stator mounted on the stator shell, wherein the drive plate is fixed on the stator shell, a Hall sensor is fixed on the end surface of the drive plate facing the stator shell, a fixing area is provided on the outer side of the stator shell, and a receiving groove for receiving the Hall sensor is provided in the fixing area.

[0006] In the above-mentioned motor for a small washing machine, the accommodating groove protrudes from the surface of the stator shell toward the stator.

[0007] In the above-mentioned motor for a small washing machine, a fixing column for fixing the driving plate is further provided in the fixing area, and the fixing column protrudes from the surface of the stator shell of the fixing area.

[0008] In the above-mentioned motor for a small washing machine, the fixing column is located beside the accommodating groove.

[0009] In the above-mentioned motor for a small washing machine, there are a plurality of accommodating grooves, and each Hall sensor corresponds to one accommodating groove.

[0010] In the above-mentioned motor for a small washing machine, the stator shell is provided with a baffle protruding from the surface of the stator shell, and the baffle is arranged around the edge of the driving plate.

[0011] In the above-mentioned motor for a small washing machine, the horizontal height of the enclosure is greater than the horizontal height of the driving plate.

[0012] In the above-mentioned motor for a small washing machine, a plug is provided on the driving board, and a notch is provided on the enclosure for allowing the plug to extend out.

[0013] In the above-mentioned motor for a small washing machine, a gap is left between the enclosure and the accommodating groove.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] By setting a receiving groove on the fixed area of ​​the stator shell, the problem of the current brushless motor driving board being too high and causing the motor thickness to increase is solved. A fixed area is set on the outside of the stator shell to define a fixed area for the driving board, and a receiving groove is provided on the stator shell in the fixed area. The Hall sensor is installed on the end face of the driving board facing the stator shell, so that the Hall sensor can extend into the receiving groove, which can not only make the driving board closer to the surface of the stator shell, shorten the distance between the driving board and the surface of the stator shell, and reduce the thickness of the motor, but also use the receiving groove to protect the Hall sensor, and also make the Hall sensor closer to the stator and rotor, which is more in line with the use scenario of small washing machines and further reduces the size of washing machines.

[0016] Furthermore, the accommodating groove protrudes from the surface of the stator shell toward the stator direction. Protruding from the stator shell toward the stator direction can make use of the gap between the stator shell and the stator to give the accommodating groove a larger space to better accommodate the Hall sensor.

[0017] Furthermore, a fixing column for fixing the drive plate is provided in the fixing area, and the fixing column protrudes from the surface of the stator shell of the fixing area. The fixing column leaves a certain gap between the drive plate and the surface of the stator shell, which is convenient for heat dissipation of the drive plate. In addition, the fixing column deepens the local size of the longitudinal stator shell, and when the drive plate is fixed to the fixing column using fasteners such as screws, better connection strength can be obtained.

[0018] Furthermore, the fixing column is located beside the receiving slot. The fixing column strengthens the strength of the stator housing beside the receiving slot and can also make the Hall sensor more stable after the drive board is installed.

[0019] Furthermore, there are multiple accommodating slots, and each Hall sensor corresponds to one accommodating slot, which not only protects each Hall sensor, but also prevents a single accommodating slot from being too long, which may reduce the strength of the stator housing.

[0020] Furthermore, the stator shell is provided with a baffle protruding from the surface of the stator shell, and the baffle is arranged around the edge of the drive plate. The baffle can position the drive plate and improve the strength of the stator shell.

[0021] Furthermore, the height of the enclosure is greater than the height of the driving plate. The enclosure can protect the driving plate to prevent other objects from hitting the driving plate during installation or transportation.

[0022] Furthermore, the driving board is provided with a plug, and the enclosure is provided with a notch for the plug to extend out. The plug can enable the driving board to be electrically connected to the outside world, and the notch is provided on the enclosure to prevent the enclosure from hindering the electrical connection between the plug and the outside world.

[0023] Furthermore, a gap is left between the enclosure and the receiving groove. When the drive board is installed, the Hall sensor will not hit the enclosure, thereby avoiding damage to the Hall sensor when the drive board is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of a motor for a small washing machine according to the utility model;

[0025] Figure 2 The utility model is a three-dimensional stator shell of a small washing machine Figure 1 ;

[0026] Figure 3 The utility model is a three-dimensional stator shell of a small washing machine Figure 2 .

[0027] The accompanying drawings are marked as follows:

[0028] Driving board 10, plug 11;

[0029] Stator housing 20 , fixing area 21 , accommodating groove 22 , fixing column 23 , enclosure 24 , and notch 25 . DETAILED DESCRIPTION

[0030] A motor for a small washing machine comprises a drive plate 10, a stator and a stator shell 20 in which the stator is installed, wherein the drive plate 10 is fixed to the stator shell 20, a Hall sensor is fixed to the end surface of the drive plate 10 facing the stator shell 20, a fixing area 21 is provided on the outside of the stator shell 20, and a receiving groove 22 for receiving the Hall sensor is provided in the fixing area 21.

[0031] By setting a receiving groove 22 in the fixed area 21 of the stator shell 20, the problem of the current brushless motor's driving board 10 being too high and causing the motor thickness to increase is solved. The fixed area 21 is set on the outside of the stator shell 20, and the fixed area 21 domain is demarcated for the driving board 10, and a receiving groove 22 is provided on the stator shell 20 in the fixed area 21. The Hall sensor is installed on the end face of the driving board 10 facing the stator shell 20, so that the Hall sensor can extend into the receiving groove 22, which can not only make the driving board 10 closer to the surface of the stator shell 20, shorten the distance between the driving board 10 and the surface of the stator shell 20, and reduce the thickness of the motor, but also can use the receiving groove 22 to protect the Hall sensor, and can also make the Hall sensor closer to the stator and rotor, which is more in line with the use scenario of a small washing machine and further reduces the size of the washing machine.

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figures 1 to 3 This is an embodiment of a motor for a small washing machine of the utility model. The motor includes a driving plate 10, a stator, a rotor, a stator shell 20 and a rotor shell. The stator is fixed on the stator shell 20, the rotor is fixed on the rotor shell, a motor shaft is arranged between the stator and the rotor, one end of the motor shaft is fixedly connected to the rotor shell, the motor shaft is rotatably connected to the stator shell 20 and the other end of the motor shaft passes through the stator shell 20. A Hall sensor is fixed on the driving plate 10, the Hall sensor is arranged toward the stator, a fixing area 21 is arranged on the outer surface of the stator shell 20, the driving plate 10 is fixed on the fixing area 21, and a receiving groove 22 for receiving the Hall sensor is arranged in the fixing area 21, that is, when the driving plate 10 is fixed to the fixing area 21, the Hall sensor extends into the receiving groove 22, thereby reducing the height of the motor, that is, the motor can be made flatter, and the size of the washing machine can be further reduced, so that the washing machine can be made smaller.

[0037] Furthermore, the accommodating groove 22 protrudes from the surface of the stator shell 20 toward the stator, so that the depth of the accommodating groove 22 can break through the thickness of the stator shell 20 and be further deepened, so as to achieve the purpose of completely accommodating the Hall sensor, and the entire Hall sensor can be located in the accommodating groove 22. The accommodating groove 22 protrudes from the surface of the stator shell 20 toward the stator, and will not affect the installation of the stator, because the stator itself needs to leave a certain installation gap with the stator shell 20.

[0038] In addition, a fixing column 23 is also provided in the fixing area 21, and the fixing column 23 protrudes from the surface of the stator shell 20 of the fixing area 21, and the drive plate 10 is fixed on the fixing column 23. Since the thickness of the stator shell 20 is not very thick, and the drive plate 10 is generally fixed on the stator shell 20 by screws, the fixing column 23 is added to the stator shell 20, and a threaded hole can be opened on the fixing column 23 to fix with the screw. Since the fixing column 23 protrudes from the surface of the stator shell 20, that is, a deeper threaded hole can be opened on the fixing column 23 than before, which will lengthen the length of the screws for fixing the drive plate 10 and the stator shell 20, and the fixing of the two is more firm. In addition, due to the addition of the fixing column 23, the drive plate 10 does not need to be installed close to the stator shell 20, which avoids the electrical components on the drive plate 10 and the stator shell 20 from being squeezed and damaged, and provides a certain heat dissipation space for these electrical components, avoids heat accumulation, and prolongs the service life of the electrical components.

[0039] Furthermore, the fixing column 23 is located beside the receiving groove 22. On the one hand, the strength of the stator housing 20 near the receiving groove 22 is increased, and on the other hand, the fixing column 23 will be closer to the Hall sensor, which can reduce the impact of the vibration of the driving board 10 on the Hall sensor.

[0040] Each motor needs to be arranged with three Hall sensors. In the present embodiment, the number of the receiving slots 22 is equal to the number of the Hall sensors, that is, each Hall sensor has an independent receiving slot 22, so as to avoid that all the receiving slots 22 are connected and cause the strength of the stator housing 20 to decrease. The position and angle of each receiving slot 22 also correspond to the position and angle of the Hall sensor.

[0041] On the basis of the above embodiment, the stator case 20 is provided with a baffle 24 protruding from the surface of the stator case 20, and the baffle 24 is arranged around the edge of the drive plate 10, that is, the drive plate 10 is wrapped in the middle by the baffle 24. The baffle 24 can not only provide positioning for the installation of the drive plate 10, but also serve as a reinforcement rib of the stator case 20, thereby improving the strength of the stator case 20 and preventing the stator case 20 from deformation.

[0042] Furthermore, the height of the enclosure 24 is greater than the height of the drive plate 10, that is, the height of the enclosure 24 is higher than the height of the drive plate 10, so that after the drive plate 10 is installed, the enclosure 24 can also protect the drive plate 10 from the side to prevent foreign objects from hitting from the side. When sealing is required, the enclosure 24 is higher than the drive plate 10 to limit the range of sealing.

[0043] The driving board 10 is also provided with a plug 11, which can be electrically connected to the outside world. Correspondingly, a notch 25 is provided on the enclosure 24 for the plug 11 to extend out, so as to prevent the enclosure 24 from obstructing the plug 11. In addition, a gap is left between the enclosure 24 and the receiving groove 22 to prevent the Hall sensor from hitting the enclosure 24 and being damaged when the driving board 10 is installed.

[0044] During installation, align the Hall sensor on the driving plate with the receiving groove 22 on the stator shell 20 so that the Hall sensor is located in the receiving groove 22, thereby reducing the height of the driving plate 10 protruding from the stator shell 20, shortening the distance between the driving plate 10 and the surface of the stator shell 20, and reducing the thickness of the motor. The receiving groove 22 can also be used to protect the Hall sensor, and the Hall sensor can also be placed closer to the stator and rotor, which is more suitable for the use scenario of a small washing machine and further reduces the size of the washing machine.

[0045] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A motor for a small washing machine, comprising a drive plate, a stator shell and a stator mounted on the stator shell, wherein the drive plate is fixed on the stator shell, characterized in that: A Hall sensor is fixed on the end surface of the driving plate facing the stator shell. A fixing area is provided on the outer side of the stator shell. A receiving groove for receiving the Hall sensor is provided in the fixing area.

2. A motor for a small washing machine according to claim 1, characterized in that: The accommodating groove protrudes from the surface of the stator shell toward the stator direction.

3. A motor for a small washing machine according to claim 1, characterized in that: A fixing column for fixing the driving plate is also provided in the fixing area, and the fixing column protrudes from the surface of the stator shell of the fixing area.

4. A motor for a small washing machine according to claim 3, characterized in that: The fixing column is located beside the accommodating groove.

5. A motor for a small washing machine according to claim 1, characterized in that: There are multiple accommodating grooves, and each Hall sensor corresponds to one accommodating groove.

6. A motor for a small washing machine according to claim 1, characterized in that: The stator shell is provided with a baffle protruding from the surface of the stator shell, and the baffle is arranged around the edge of the driving plate.

7. A motor for a small washing machine according to claim 6, characterized in that: The horizontal height of the enclosure is greater than the horizontal height of the driving plate.

8. A motor for a small washing machine according to claim 6, characterized in that: The driving plate is provided with a plug, and the enclosure is provided with a notch for allowing the plug to extend out.

9. A motor for a small washing machine according to claim 6, characterized in that: A gap is left between the enclosure and the accommodating groove.

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