Outer rotor structure of air fryer motor

Abstract

The utility model provides an outer rotor structure of an air fryer motor. The outer rotor structure comprises a motor base, a motor shaft, a permanent magnet, a rotor shell, a stator, a heat dissipation shell and a circuit board, the stator is fixedly connected with the motor base, the permanent magnet is arranged on the outer layer of the stator, the rotor shell is fixedly connected with the permanent magnet, the stator is arranged on the inner layer, the rotor is arranged on the outer layer, and the heat dissipation shell is tightly attached to the rotor shell, so that the jumping condition can be obviously reduced, and the vibration and noise conditions of motor working are improved; meanwhile, the circuit board can be smoothly installed, especially the arrangement mode of the motor base ensures rapid assembly and positioning of the stator, the rotor and the circuit board, in addition, the heat dissipation performance of the motor is further improved through the arrangement of heat dissipation holes, heat dissipation grooves and the like, and the motor adapts to the hot air environment of an air fryer.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a kind of air fryer motor outer rotor structure. BACKGROUND

[0002] Air fryer is a kind of in internal rely on fast circulating hot air to food heating and baking cooking utensil, mainly using air to replace the hot oil in original frying pan, let food be cooked, while hot air also blows away the moisture of food surface layer, so that food material reaches approximately oil frying effect. The motor in air fryer mainly has two categories, one is used to drive fan to carry out hot air circulation, and another is used to drive grill rotation etc. In prior art, the motor of driving fan mostly adopts direct-current brushless motor, and it is inner rotor structure, i.e. the rotor of motor is arranged in inner layer, and stator is arranged in outer layer. For the design of more and more small size air fryer, this structure is difficult to meet the space compactness, and the circuit board of motor is also difficult to install, and heat dissipation performance is not good, which needs to be further improved. SUMMARY

[0003] The utility model aims at the deficiency in the above background art, provide a kind of air fryer motor design of outer rotor structure, to better meet the space compactness requirement, while guaranteeing that the circuit board of motor is installed conveniently, and heat dissipation effect is good.

[0004] In order to achieve the above object, the utility model provides a kind of air fryer motor outer rotor structure, including motor base, motor shaft, permanent magnet, rotor shell, stator, heat dissipation shell, circuit board;The stator is fixedly connected with the motor base, and is arranged in inner layer, the permanent magnet is arranged in the outer layer of the stator, can rotate relative to the stator, the rotor shell is fixedly connected with the permanent magnet, to rotate synchronously with the permanent magnet, the motor shaft is arranged in the shaft hole of the motor base, and is rotatably connected with the motor base, the motor shaft is fixedly connected with the first center hole of the rotor shell;The heat dissipation shell is sleeved on the outside of the rotor shell, and is fixedly connected with the rotor shell, the heat dissipation shell is provided with heat dissipation blade, the circuit board is connected with the motor base, the circuit board has preset spacing with the stator, and the circuit board is connected with the stator by connecting line.

[0005] Further, the shaft hole of the motor base is provided with bearing, and the bearing is connected with the motor shaft.

[0006] Further, the outer diameter of the motor base is steppedly reduced from first end to second end, has multiple stepped surfaces, first the stepped surface is used to position the installation position of the circuit board, and second the stepped surface is used to position the installation position of stator.

[0007] Further, the first end of the motor base is provided with a plurality of mounting strips, and the mounting strips are provided with mounting holes.

[0008] Further, the rotor shell is in interference fit with the permanent magnet.

[0009] Further, the motor shaft is in interference fit with the first center hole of the rotor shell.

[0010] Further, the heat dissipation shell is in interference fit with the rotor shell.

[0011] Further, the heat dissipation shell is provided with a plurality of heat dissipation grooves in a hollow form.

[0012] Further, the rotor shell is provided with heat dissipation holes.

[0013] The above scheme of the utility model has the following beneficial effects:

[0014] The air fryer motor outer rotor structure provided by the utility model has the following advantages: the stator is arranged in the inner layer, the rotor is arranged in the outer layer, the heat dissipation shell is tightly attached to the rotor shell, the jumping condition can be obviously reduced, the vibration and noise conditions of the motor working are improved, the circuit board can be smoothly installed, the quick assembly and positioning of the stator, the rotor and the circuit board are ensured by the arrangement mode of the motor base, the heat dissipation performance of the motor is further improved by the arrangement of the heat dissipation holes and the heat dissipation grooves, and the hot air environment of the air fryer is adapted.

[0015] Other beneficial effects of the utility model will be described in detail in the following specific embodiment part. DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 It is an internal structure schematic view of the utility model;

[0018] Figure 3 It is a motor base structure schematic view of the utility model;

[0019] Figure 4 It is a heat dissipation structure schematic view of the utility model.

[0020] EXPLANATION OF REFERENCE NUMBERS

[0021] 1-motor base; 2-motor shaft; 3-permanent magnet; 4-rotor shell; 5-stator; 6-heat dissipation shell; 7-circuit board; 8-connection line; 9-bearing; 10-mounting strip; 11-heat dissipation groove; 12-heat dissipation hole. CONCRETE EMBODIMENT

[0022] In order to make the technical problems, technical schemes and advantages to be solved by the utility model more clear, the following will be described in detail in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model. In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be locking connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] As shown in Figure 1 , Figure 2 The embodiment of the utility model provides an air fryer motor outer rotor structure, including motor base 1, motor shaft 2, permanent magnet 3, rotor shell 4, stator 5, heat dissipation shell 6, also including circuit board 7. Among them, stator 5 is fixedly connected with motor base 1, and is arranged in the inner layer. Permanent magnet 3 and rotor shell 4 constitute a rotor, permanent magnet 3 is arranged in the outer layer of stator 5, can rotate relative to stator 5, rotor shell 4 is arranged in the outer layer of permanent magnet 3, and is fixedly connected with permanent magnet 3, to rotate synchronously with permanent magnet 3. Motor shaft 2 is arranged in the shaft hole of motor base 1, and is rotatably connected with motor base 1, and it is the output shaft of the whole motor. Motor shaft 2 is fixedly connected with the first center hole of rotor shell 4, so when the rotor rotates after stator 5 is electrified, it can drive motor shaft 2 to rotate, so that the hot air impeller connected with motor shaft 2 rotates.

[0026] In the embodiment, the heat dissipation shell 6 is sleeved outside the rotor shell 4 and fixedly connected with the rotor shell 4. The heat dissipation shell 6 is provided with heat dissipation blades, which are preferably integrally formed. When the rotor rotates, the heat dissipation shell 6 rotates synchronously, the heat dissipation blades act on the surrounding air, thereby dissipating heat of the entire motor, so that the motor in a hot air environment will not overheat and fail, etc. It should be noted that the angle, number and form of the heat dissipation blades need to be debugged to improve the heat dissipation efficiency without significantly increasing the vibration and noise of the motor, etc.

[0027] It is worth mentioning that, in the embodiment, the heat dissipation shell 6 is fixedly connected with the rotor shell 4, especially closely attached to the rotor shell 4. Compared with the mode of being directly fixedly connected with the motor shaft 2, the mode can obviously reduce the jumping condition and improve the vibration and noise of the motor during operation, etc.

[0028] In the embodiment, the circuit board 7 is sleeved on the motor base 1 and has a certain interval with the stator 5. The circuit board 7 is connected with the stator 5 through the connecting line 8 to supply power to the stator 5 after being powered on to drive the rotor to rotate. Therefore, based on the fact that the motor shaft 2 is inside the shaft hole of the motor base 1, its rotation will not interfere with the connecting line 8 of the stator 5, ensuring the order and reliability of the motor. As a preferred embodiment, the shaft hole of the motor base 1 is provided with a bearing 9 in the embodiment to support the rotation of the motor shaft 2, so that the rotation of the motor shaft 2 is more stable, further reducing the vibration and noise of the motor during operation, etc.

[0029] It should be noted that the first end of the motor base 1 is located outside the rotor shell 4 in the embodiment, and the circuit board 7 is also located outside the rotor shell 4, which ensures that the circuit board 7 can be smoothly installed and will not be affected by the rotation of the rotor. At the same time, as shown in Figure 3 As a preferred embodiment, the outer diameter of the motor base 1 is stepped from the first end to the second end in the embodiment, which can be considered as having a plurality of stepped surfaces. The first stepped surface is used to position the installation position of the circuit board 7, and the second stepped surface is used to position the installation position of the stator 5. Since the rotor and the stator 5 are positionally corresponding, the distance between the circuit board 7 and the rotor can be easily determined.

[0030] In the embodiment, the first end of the motor base 1 is also provided with a plurality of mounting strips 10, and mounting holes are formed in the mounting strips 10. The motor base 1 is fixed at a predetermined position through the mounting holes, i.e. the motor is installed at a suitable position of the air fryer.

[0031] As a preferred embodiment, the plurality of fixed connections in the foregoing embodiment are interference fit connection modes, so as to reduce the opening, reduce the processing and assembling difficulty, etc., including the interference fit between the rotor shell 4 and the permanent magnet 3, the interference fit between the motor shaft 2 and the first center hole of the rotor shell 4, the interference fit between the heat dissipation shell 6 and the rotor shell 4, etc. Among them, the heat dissipation shell 6 is provided with a second center hole, which can be used for the end of the motor shaft 2 to pass through, so that the motor shaft 2 can extend to the outside of the heat dissipation shell 6 and be connected with the hot air impeller, and the second center hole is not directly connected with the motor shaft 2.

[0032] At the same time, as shown in Figure 4 In order to further improve the heat dissipation performance of the motor and adapt to the working environment of the air fryer, a plurality of heat dissipation grooves 11 are also provided on the surface of the heat dissipation shell 6 in the embodiment, and the heat dissipation grooves 11 are designed as hollow to make more surfaces of the rotor shell 4 directly contact with the external environment, thereby further improving the heat dissipation effect. This design can also reduce the weight of the heat dissipation shell 6 (while ensuring a certain strength), so as to make the motor output more stable.

[0033] As a further improvement, the heat dissipation holes 12 can also be provided on the rotor shell 4 in the embodiment, so that a certain convection can be formed in the motor, especially in the case that the rotation of the heat dissipation shell 6 makes the surrounding air flow faster, so as to achieve better heat dissipation effect.

[0034] In summary, the air fryer motor outer rotor structure provided by the embodiment can better meet the compactness requirement of the air fryer inner space, while ensuring convenient installation of the circuit board of the motor and good heat dissipation effect, thereby improving the reliability of the air fryer.

[0035] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0036] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An air fryer motor outer rotor structure, characterized by, The device includes a motor base, a motor shaft, a permanent magnet, a rotor housing, a stator, a heat sink housing, and a circuit board. The stator is fixedly connected to the motor base and is disposed in the inner layer. The permanent magnet is disposed in the outer layer of the stator and can rotate relative to the stator. The rotor housing is fixedly connected to the permanent magnet so as to rotate synchronously with the permanent magnet. The motor shaft passes through the shaft hole of the motor base and is rotatably connected to the motor base. The motor shaft is fixedly connected to the first center hole of the rotor housing. The heat sink housing is sleeved on the outside of the rotor housing and is fixedly connected to the rotor housing. The heat sink housing is provided with heat dissipation blades. The circuit board is connected to the motor base and has a preset distance from the stator. The circuit board is connected to the stator through a connecting wire.

2. The external rotor structure of an air fryer motor according to claim 1, characterized in that, A bearing is installed in the shaft hole of the motor base, and the bearing is connected to the motor shaft.

3. The external rotor structure of an air fryer motor according to claim 1, characterized in that, The outer diameter of the motor mount decreases in a stepped manner from the first end to the second end, and it has multiple stepped surfaces. The first stepped surface is used to position the circuit board, and the second stepped surface is used to position the stator.

4. The external rotor structure of an air fryer motor according to claim 1, characterized in that, The first end of the motor base is provided with multiple mounting strips, and the mounting strips are provided with mounting holes.

5. The external rotor structure of an air fryer motor according to claim 1, characterized in that, The rotor housing is interference-fitted with the permanent magnet.

6. The external rotor structure of an air fryer motor according to claim 1, characterized in that, The motor shaft is interference-fitted with the first center hole of the rotor housing.

7. The external rotor structure of an air fryer motor according to claim 1, characterized in that, The heat dissipation housing is interference-fitted with the rotor housing.

8. The external rotor structure of an air fryer motor according to claim 1, characterized in that, The heat dissipation housing has multiple heat dissipation slots, which are hollow in shape.

9. The external rotor structure of an air fryer motor according to claim 1, characterized in that, The rotor housing has heat dissipation holes.

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