Rotor assembly, motor and food processor

Abstract

The utility model discloses a rotor assembly, a motor and a food processor. The rotor assembly comprises a motor shaft, an upper end piece, a lower end piece magnet or a coil winding. The upper end piece is fixed to the motor shaft. The lower end piece is fixed to the motor shaft, and the lower end piece and the upper end piece are arranged at intervals in the axial direction of the motor shaft. And the magnet or the coil winding is fixed on the motor shaft and is positioned between the upper end piece and the lower end piece. At least one of the upper end piece and the lower end piece comprises fan blades, and the fan blades are arranged in the circumferential direction of the motor shaft at intervals. Therefore, after the rotor assembly and the stator assembly form the motor, the fan blades serve as components of the motor, the fan blades and the motor are mutually independent components, and compared with the fan blades which are separated from the motor by a preset distance in the axial direction of the motor shaft, the rotation of the fan blades does not enable the motor to swing, so that the dynamic balance of the motor is good. And the fan blades can generate wind, and the wind is used for cooling the motor, so that the motor has good dynamic balance on the premise of having a cooling function.

Description

Technical Field

[0001] The present application relates to the technical field of small household appliances, and in particular to a rotor assembly, a motor and a food processor. Background Art

[0002] The food processor includes a motor, a knife assembly and a mixing cup. The motor drives the knife assembly to rotate in the mixing cup, thereby crushing the ingredients in the mixing cup (for example, making soy milk, squeezing juice, etc.).

[0003] The food processor generates heat during operation. In order to dissipate the heat, a fan is arranged on the motor shaft of the motor in the related art, and the motor shaft drives the fan blades to rotate to achieve heat dissipation.

[0004] However, technicians have found that the design of the above fan will make the motor noisy. Utility Model Content

[0005] The purpose of the present application is to disclose a rotor assembly, a motor and a food processor. The rotor assembly can reduce the noise of the motor.

[0006] In a first aspect, the present application discloses a rotor assembly. The rotor assembly includes a motor shaft, an upper end piece, a lower end piece magnet or a coil winding. The upper end piece is fixed to the motor shaft. The lower end piece is fixed to the motor shaft and is spaced apart from the upper end piece in the axial direction of the motor shaft. The magnet or the coil winding is fixed to the motor shaft and is located between the upper end piece and the lower end piece. At least one of the upper end piece and the lower end piece includes a fan blade, and the fan blade is spaced apart around the circumference of the motor shaft.

[0007] As described above, in the present application, because at least one of the upper and lower end parts of the rotor assembly includes a fan blade, after such a rotor assembly and the stator assembly form a motor, the fan blade, as a component of the motor, is a component independent of the fan blade (fan) and the motor. The wind generated by the fan blade has fewer components to collide with, and the fewer collisions, the lower the noise, and thus, the noise is low. Compared with the fan blade being separated from the motor by a preset distance in the axial direction of the motor shaft, because the fan blade is a component of the rotor assembly, the rotation of the fan blade will not cause the motor to swing, and thus, the dynamic balance of the motor is good. The fan blade can generate wind, and the wind is used to dissipate heat from the motor. Therefore, the above-mentioned setting enables the motor to have good dynamic balance while having a heat dissipation function.

[0008] In some embodiments, the fan blades are arranged at intervals to form a connecting groove, and the connecting groove is connected to the outside of the rotor assembly. The width of the connecting groove gradually decreases along the direction approaching the edge of the rotor assembly.

[0009] As configured above, the width of the connecting groove gradually decreases, which will make the size of the fan blade close to the edge of the upper end piece or the edge of the lower end piece larger, so that the fan blade is stronger and is not easily broken.

[0010] In some embodiments, the fan blades are arranged at intervals to form a connecting groove, the connecting groove is connected to the outside of the rotor assembly, and the widths of the connecting grooves are equal. The widths of the connecting grooves along the radial direction of the rotor assembly are equal.

[0011] Since the widths of the connecting grooves are equal, the fan blades can drive a larger amount of air, so the heat dissipation effect of the rotor assembly is good.

[0012] In some embodiments, the projection of the fan blade on the radial plane of the motor shaft is trapezoidal, and the lower base of the trapezoid is farther away from the motor shaft than the upper base.

[0013] As set up above, since the projection of the fan blade on the radial plane of the motor shaft is trapezoidal, the fan blade has greater strength and is not easily broken.

[0014] In some embodiments, the projection of the fan blade on the radial plane of the motor shaft is arc-shaped or square-shaped.

[0015] As described above, since the projection of the fan blade is arc-shaped, the wind energy moves along the bending direction of the fan blade, and the heat dissipation effect is good. Since the projection of the fan blade is square, the fan blade has a good heat dissipation effect, is strong, and is not easy to break.

[0016] In a second aspect, the present application discloses a motor, the motor comprising any of the aforementioned rotor assemblies, a stator assembly and a motor housing. The motor housing comprises a receiving cavity. The stator assembly is located in the receiving cavity. The rotor assembly is located in the receiving cavity and is rotatably connected to the motor housing. The motor housing is also provided with an air outlet, and the wind generated by the fan blade is discharged from the air outlet.

[0017] As described above, since the rotor assembly and the stator assembly are both located in the accommodating chamber, the fan blades only rotate inside the accommodating chamber, and the noise generated by the rotation is limited to the accommodating chamber, so the noise of the rotor assembly or the motor is small. Furthermore, in some operations, when the rotor assembly rotates in the opposite direction, the fan blades will be driven to start rotating in the opposite direction accordingly. Since the fan blades push the airflow in the reverse process, in addition to forming an outward centrifugal component, they will also form a tangential component in the same direction of the fan blade movement, which will cause the airflow to accelerate sharply during the reverse process, and when the speed gradually increases, it will also form a certain trend of converging toward the center of the fan blade. However, when passing through the lower shell, it can be rectified along the inner wall of the lower shell and guided to the air outlet, and concentrated at the air outlet to be quickly guided outward, which can not only increase the rectification coverage in the circumferential direction of the fan blades, avoid the formation of turbulence inside the accommodating chamber to hinder the air flow, but also can concentrate the air outlet to increase the diversion speed, and because the airflow at the air outlet has better consistency after the rectification of the air outlet direction, the wind noise problem generated at the air outlet is also greatly reduced. Furthermore, at least one of the upper end member and the lower end member includes a fan blade. Compared with a fan provided on the motor shaft, the motor does not need to drive a separate fan, and the driving power requirement is low. Finally, the rotor assembly and the stator assembly are both located in the motor housing, and the heat generated by the motor (such as the heat generated by the coil winding) can be discharged from the air outlet by the wind generated by the fan blade, thereby achieving heat dissipation of the motor. Therefore, under the premise of achieving heat dissipation, the noise of the motor is low.

[0018] In some embodiments, there are multiple air outlets, which are evenly spaced around the circumference of the motor shaft.

[0019] As set up as above, since there are multiple air outlets, they are evenly spaced around the circumference of the motor shaft, so the heat dissipation effect is good, for example, the air flow area is large, resulting in a good heat dissipation effect.

[0020] In some embodiments, the motor housing includes an upper shell and a lower shell, the upper shell and the lower shell constitute the accommodating cavity, the upper shell and the lower shell are respectively provided with the air outlets, and the air outlets are spaced apart in the axial direction of the motor shaft.

[0021] As configured above, since the air outlets are spaced apart in the axial direction of the motor shaft, the wind generated by the fan blades can pass through the motor, thereby achieving a better heat dissipation effect on the motor.

[0022] In some embodiments, the air outlet is in a trapezoidal shape, and a lower base of the trapezoid is farther away from the center of the motor housing than an upper base.

[0023] As set up above, since the lower base of the trapezoid is farther away from the motor housing than the upper base, combined with the evenly spaced distribution of the air outlets around the circumference of the motor shaft, the width between adjacent air outlets near the motor shaft can be made correspondingly wider (for example, compared with square air outlets), thereby ensuring the strength of each of the upper shell and the lower shell, and further ensuring the strength of the motor.

[0024] In some embodiments, the motor housing includes an upper housing and a lower housing, the upper housing and the lower housing constitute the accommodating cavity, and are respectively provided with a bearing installation cavity. The motor includes bearings connected to the motor shaft and spaced axially from the motor shaft; the bearings are respectively fixed to the bearing installation cavities. The stator assembly is pressed against the upper housing and the lower housing.

[0025] As set up above, the accommodating cavity is formed by the upper shell and the lower shell, and the bearing installation cavities for installing the bearings are respectively set, and the spaced bearings are respectively fixed in the bearing installation cavities, and the rotor assembly and the stator assembly are both located in the accommodating cavity. In this way, the motor shaft, the rotor assembly and the stator assembly can be placed in the lower shell, and the upper shell and the lower shell are locked to complete the tightening of the stator assembly, thereby completing the assembly of the motor, and the assembly of the motor is simple.

[0026] In some embodiments, the stator assembly includes a plurality of coil windings and a plurality of wire blocking members that are spaced apart circumferentially along the motor housing, and one wire blocking member is disposed between any adjacent coil windings.

[0027] As described above, a wire blocking member is provided between any adjacent coil windings, and the wire blocking member can prevent the coil windings from falling apart.

[0028] In a third aspect, the present application discloses a food processor, which comprises a mixing cup, a knife assembly, and any one of the aforementioned motors, wherein the motor drives the knife assembly to rotate in the mixing cup.

[0029] As configured above, the food processor at least has the beneficial effects of the rotor assembly or the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a cross-sectional view of a food processor in the related art;

[0031] Figure 2 It is a three-dimensional diagram of a motor in the related art;

[0032] Figure 3 yes Figure 2 A cross-sectional view of the motor shown;

[0033] Figure 4 yes Figure 2A perspective view of the rotor assembly of the motor shown;

[0034] Figure 5 is a cross-sectional view of a food processor according to an embodiment of the present application;

[0035] Figure 6 is an exploded view of a first motor according to an embodiment of the present application;

[0036] Figure 7 yes Figure 6 An exploded view of the first type of motor shown;

[0037] Figure 8 yes Figure 6 A cross-sectional view of the first motor shown;

[0038] Fig. 9 yes Figure 6 A perspective view of the rotor assembly of the first motor shown;

[0039] Fig.10 is an exploded view of a second motor according to an embodiment of the present application;

[0040] Fig.11 yes Fig.10 A schematic diagram of the upper housing, rotor assembly and stator assembly of the motor shown in an assembled state;

[0041] Fig.12 It is a schematic diagram of the rotor assembly of the second motor excluding the motor shaft. DETAILED DESCRIPTION

[0042] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0043] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0044] See also Figure 2 and Figure 3 Combined with Figure 1 and Figure 4 In the related art, the food processor includes a motor 100, a mixing cup 200, a knife assembly 300 and a fan 900. The motor 100 includes a rotor assembly 10 and a stator assembly 20. The rotor assembly 10 Figure 4 The blending cup 200 includes a motor shaft 1, an upper end member 2, a lower end member 3 and a magnet 4. The magnet 4 is located between the upper end member 2 and the lower end member 3. The motor 100 drives the blade assembly 300 to rotate in the blending cup 200. In order to dissipate heat, the fan 900 is installed on the motor shaft 1 of the rotor assembly 10, and is arranged at intervals along the axial direction of the motor shaft 1 with the whole formed by the rotor assembly 10 and the stator assembly 20, that is, as shown in FIG. Figure 2 and Figure 3 As shown, the fan 900 and the motor 100 are independent components. When the motor 100 is working (when the magnetic force between the stator assembly 20 and the rotor assembly 10 causes the rotor assembly 10 to rotate), the motor shaft 1 can drive the fan blades 21 of the fan 900 to rotate to achieve heat dissipation.

[0045] In the motor 100 of the food processor, the wind generated by the fan blades 21 will collide with more components, such as the rotor assembly, etc., thereby generating a large amount of noise.

[0046] In order to solve the above problems, in a first aspect, the present application discloses a rotor assembly 10 . Fig. 9 A first rotor assembly 10 is shown schematically, Fig.10 and Fig.12 A second rotor assembly 10 is shown, but the motor shaft is not shown.

[0047] In a second aspect, the present application further discloses a motor 100. The motor comprises any rotor assembly 10, a stator assembly 20 and a motor housing 30 described in the present application. Figure 6 , Figure 7 and Figure 8 A first electric machine 100 is shown schematically. Fig.10 A second electric machine 100 is illustrated. Fig.10 A second electric machine 100 is illustrated.

[0048] The relevant structure of the rotor assembly 10 of the present application is described as follows.

[0049] See also Fig. 9 Combined with Figure 8 and Figure 7 ,as well as Fig.12 Combined with Fig.10 , whether Fig. 9 The first rotor assembly 10 shown is still Fig.12 The second rotor assembly 10 shown includes a motor shaft 1, an upper end piece 2, a lower end piece 3 and a magnet 4. The upper end piece 2 and the lower end piece 3 are plate-shaped in this embodiment, but are not limited thereto, and at least the subsequent fan blades 21 can be set. The upper end piece 2 and the lower end piece 3 are plate-shaped in the embodiment of the present application. The upper end piece 2 is fixed to the motor shaft 1. The lower end piece 3 is fixed to the motor shaft 1 and is spaced apart from the upper end piece 2 in the axial direction of the motor shaft 1. The magnet 4 is fixed to the motor shaft 1 and is located between the upper end piece 2 and the lower end piece 3. The upper end piece 2 and the lower end piece 3 both include fan blades 21. In the embodiment of the present application, the upper end piece 2 includes an upper end piece body 22, and the fan blades 21 are located at the edge of the upper end piece body 22 and surround the upper end piece body 22. The lower end member 3 includes a lower end member body 32, and the fan blades 21 are located at the edge of the lower end member body 32 and surround the lower end member body 32. The fan blades 21 are arranged at intervals in the circumferential direction around the motor shaft 1. Of course, the technicians can understand that as long as at least one of the upper end member 2 and the lower end member 3 includes the fan blades 21. The function of the fan blades 21 is the same as that of the fan blades 21 of the fan 900, and therefore, the structure is not limited to the structure shown in the present application.

[0050] For the motor 100, the rotor assembly 10 and the stator assembly 20 realize the rotation of the rotor assembly 10 through magnetic force, so the rotor assembly 10 includes the magnet 4 in this embodiment, and the stator assembly 20 includes the coil winding 201. In other embodiments, the rotor assembly 10 may include the coil winding 201, and the stator assembly 20 may include the magnet 4. Of course, in this embodiment, since the coil winding 201 needs to be energized, the rotor assembly 10 may include components such as slip rings to prevent the wires that energize the coil winding 201 from being entangled due to the rotation of the rotor assembly 10, etc.

[0051] Will Fig.12 and Fig. 9 Both Figure 4 It is known that Figure 1 The related rotor assembly 10 shown does not have the fan blade 21, but in the present application, because at least one of the upper end piece 2 and the lower end piece 3 of the rotor assembly 10 includes the fan blade 21, after such a rotor assembly 10 and the stator assembly 20 form the motor 100, the fan blade 21 is a component of the motor 100, and the fan blade 21 (fan 900) and the motor 100 are independent components, and the wind generated by the fan blade has fewer components to collide with (for example, compared with the related design, at least the collision between the fan blade (fan) and the motor is reduced), the fewer the collisions, the lower the noise, and thus, the noise is low. In addition, compared with the fan blade 21 being separated from the motor 100 by a preset distance in the axial direction of the motor shaft (that is, the fan is independent of the motor), because the fan blade 21 is a component of the rotor assembly 10 and a part of the motor 100, the rotation of the fan blade 21 will not cause the motor 100 to swing, so that the dynamic balance of the motor 100 is good. The fan blades 21 can generate wind, and the wind is used to dissipate heat for the motor 100. Therefore, the above arrangement enables the motor to have good dynamic balance while having the heat dissipation function.

[0052] See also Fig. 9 Combined with Figure 7 ,as well as, Fig.12 Combined with Fig.10 The fan blades 21 are arranged at intervals to form a connecting groove 23, and the connecting groove 23 is connected to the outside of the rotor assembly 10. The width of the connecting groove 23 gradually decreases along the direction close to the edge of the rotor assembly 10. Fig. 9 and Fig.12 In other words, the width of the connecting groove 23 decreases as it approaches the edge of the rotor assembly 10 .

[0053] As configured above, since the width of the connecting groove 23 gradually decreases, the size of the fan blade 21 close to the edge of the upper end member 2 or the edge of the lower end member 3 will be larger, so that the fan blade 21 is stronger and is not easily broken.

[0054] See also Fig. 9 Combined with Figure 7 , the projection of the fan blade 21 on the radial plane of the motor shaft 1 is trapezoidal, and the lower base of the trapezoid is farther away from the motor shaft 1 than the upper base. It can also be understood that the width of the connecting groove 23 is gradually reduced by the fan blade 21 having a trapezoidal shape. Of course, the fan blade 21 having a trapezoidal shape may not gradually reduce the width of the connecting groove 23. In short, as long as the fan blade 21 can generate wind and achieve the function of heat dissipation, it is sufficient.

[0055] As configured above, since the projection of the fan blade 21 on the radial plane of the motor shaft 1 is trapezoidal, the fan blade 21 has a greater strength and is not easily broken.

[0056] In some embodiments, the fan blades 21 are arranged at intervals to form a connecting groove 23, and the connecting groove 23 is connected to the outside of the rotor assembly 10. The width of the connecting groove 23 along the radial direction of the rotor assembly is equal.

[0057] Since the widths of the connecting grooves 23 are equal, the fan blades 21 can drive a larger amount of air, so the heat dissipation effect of the rotor assembly is good.

[0058] There are many ways to achieve the equal width, and two implementation methods are described below:

[0059] See also Fig.12 Combined with Fig.10 and Fig.11 , the projection of the fan blade 21 on the radial plane of the motor shaft 1 is arc-shaped. The widths of the connecting grooves 23 may also be equal, and it can also be understood that the width of the connecting grooves 23 is gradually reduced by the arc-shaped fan blades 21. Of course, the fan blades 21 that are curved in an arc shape may not achieve the gradual reduction of the width of the connecting grooves 23. In short, as long as the fan blades 21 can generate wind and achieve the function of heat dissipation, it is sufficient.

[0060] As described above, since the projection of the fan blade 21 is arc-shaped, the wind resistance impact will be smaller and the noise will be smaller. When the arc-shaped fan blade 21 is combined with the equal width of the connecting groove 23, low noise and good heat dissipation effect can be achieved.

[0061] As an alternative to the arc shape and the trapezoidal shape, in some embodiments, the projection of the fan blade 21 on the radial plane of the motor shaft 1 is square. In this case, the widths of the connecting grooves 23 may be equal or unequal.

[0062] As described above, since the projection of the fan blade 21 is square, the fan blade 21 has a larger cutting angle with the wind, and the fan blade 21 can drive more wind volume and achieve better heat dissipation effect. When the square fan blade 21 is combined with the equal width of the connecting groove 23, the heat dissipation effect is better.

[0063] See also Figure 7 , Figure 8 and Figure 6 ,as well as Fig.10 Combined with Fig.11 The motor disclosed in the present application includes any of the aforementioned rotor assemblies 10, stator assemblies 20 and motor housing 30. The motor housing 30 includes a receiving cavity 301. The structure of the motor housing 30 is not limited. In the embodiment of the present application, the motor housing 30 includes an upper housing 302 and a lower housing 303. The upper housing 302 and the lower housing 303 are locked by four screws 309 to form the receiving cavity 301. See Figure 8 Combined with Figure 5 and Fig.11 , the stator assembly 20 is located in the accommodating cavity 301; the rotor assembly 10 is located in the accommodating cavity 301, and is rotatably connected to the motor housing 30. The purpose of the rotational connection is to enable the rotor assembly 10 to rotate relative to the stator assembly 20, so there is no limitation on how to rotationally connect. In an embodiment of the present application, the motor shaft 1 of the rotor assembly 10 is rotatably connected to the motor housing 30 through a bearing 305 (as described in an embodiment later). The motor housing 30 is also provided with an air outlet 304, and the wind generated by the fan blades 21 is discharged from the air outlet 304. How the air outlet 304 is arranged is not limited to the embodiment described later, and it is sufficient as long as it can discharge the wind generated by the fan blades 21 to dissipate the heat of the motor.

[0064] As described above, since the rotor assembly 10 and the stator assembly 20 are both located in the accommodating chamber 301, the fan blade 21 only rotates inside the accommodating chamber 301, and the noise generated by the rotation is confined in the accommodating chamber 301, so the noise of the rotor assembly 10 or the motor 100 is small. Figure 3The fan 900 (blades 21) shown is located in the motor 100. The fan 900 (blades 21) and the motor 100 are independent so that the blades 21 are located outside the motor 100. The wind generated by the rotation of the blades 21 driven by the motor 100 will collide with multiple components and cause loud noise. For example, the fan 900 collides with the motor 100 and causes loud noise. Furthermore, in some operations, when the rotor assembly 10 rotates in the opposite direction, it will correspondingly drive the fan blades 21 to start rotating in the opposite direction. Since the fan blades push the airflow in the reverse process, in addition to forming an outward centrifugal component, it will also form a tangential component in the same direction of movement of the fan blades 21, causing the airflow to accelerate sharply during the reverse process, and when the rotation speed gradually increases, it will also form a certain tendency to converge toward the center of the fan blades 21. However, when passing through the lower shell 303, it can be rectified along the inner wall of the lower shell 303 and guided to the air outlet 304, concentrated at the air outlet 304 and quickly discharged outward, which can increase the rectification coverage range in the circumferential direction of the fan blades 21 and avoid the formation of turbulence inside the accommodating cavity 301 to hinder the air flow, and at the same time, it can also concentrate the air outlet 304 to increase the diversion speed. In addition, since the airflow at the outlet has better consistency after the rectification of the outlet direction, the wind noise problem generated at the air outlet is also greatly reduced. Furthermore, at least one of the upper end member 2 and the lower end member 3 includes a fan blade 21. Compared with the fan 900 provided on the motor shaft, the motor does not need to drive a separate fan 900, the number of driven parts is reduced, and the driving power requirement is low. Finally, the rotor assembly 10 and the stator assembly 20 are both located in the motor housing 30. The heat generated by the motor 100 (such as the heat generated by the coil winding 201) can be discharged from the air outlet 304 by the wind generated by the fan blade 21, thereby achieving heat dissipation of the motor 100. Therefore, under the premise of achieving heat dissipation, the noise of the motor 100 is low.

[0065] See also Figure 7 Combined with Figure 6 and Figure 8 , and see Fig.10 There are multiple air outlets 304 , which are evenly spaced around the circumference of the motor shaft 1 .

[0066] As set up as above, since there are a plurality of air outlets 304, which are evenly spaced around the circumference of the motor shaft 1, the heat dissipation effect is good, for example, the air flow area is large, resulting in a good heat dissipation effect.

[0067] See also Figure 7 Combined with Figure 6 and Figure 8 , and see Fig.10The motor housing 30 includes an upper housing 302 and a lower housing 303, wherein the upper housing 302 and the lower housing 303 constitute the accommodating chamber 301, and the upper housing 302 and the lower housing 303 are respectively provided with the air outlets 304, and the air outlets 304 are spaced apart in the axial direction of the motor shaft 1. Specifically, in the embodiment of the present application, the top of the upper housing 302 and the bottom of the lower housing 303 are respectively provided with the air outlets 304, so that it is equivalent to providing the air outlets 304 on two parallel plates of unequal heights, so as to achieve the air outlets 304 being spaced apart in the axial direction of the motor shaft 1.

[0068] As configured above, since the air outlets 304 are spaced apart in the axial direction of the motor shaft 1 , the wind generated by the fan blades 21 can pass through the motor 100 , thereby achieving a better heat dissipation effect on the motor 100 .

[0069] See also Figure 6 , Figure 7 and Figure 8 , and see Fig.10 The air outlet 304 is in a trapezoidal shape, and the lower base of the trapezoid is farther away from the center of the motor housing 30 than the upper base. The center of the motor housing 30 can be considered to be on the rotation center line of the motor shaft 1.

[0070] As configured above, since the lower base of the trapezoid is farther away from the motor housing 30 than the upper base, combined with the evenly spaced distribution of the air outlets 304 around the circumference of the motor shaft 1, the width between adjacent air outlets 304 near the motor shaft 1 can be correspondingly wider (for example, compared with the square air outlets 304), thereby ensuring the strength of each of the upper housing 302 and the lower housing 303, and further ensuring the strength of the motor 100.

[0071] See also Figure 7 , Figure 8 and Fig.10 Combined with Fig.12 The motor housing 30 includes an upper housing 302 and a lower housing 303, wherein the upper housing 302 and the lower housing 303 constitute the accommodating chamber 301 and are respectively provided with a bearing installation chamber 3021. The motor 100 includes bearings 305 connected to the motor shaft 1 and spaced apart in the axial direction of the motor shaft 1. The spaced apart bearings 305 are respectively fixed to the bearing installation chamber 3021, that is, the bearing installation chamber 3021 of each of the upper housing 302 and the lower housing 303 is fixed with the bearing 305. The stator assembly 20 is pressed against the upper housing 302 and the lower housing 303.

[0072] As described above, the accommodating cavity 301 is formed by the upper shell 302 and the lower shell 303, and the bearing installation cavities 3021 for installing the bearings 305 are respectively provided, and the spaced bearings 305 are respectively fixed in the bearing installation cavities 3021, and the rotor assembly 10 and the stator assembly 20 are both located in the accommodating cavity 301. In this way, the motor shaft 1, the rotor assembly 10 and the stator assembly 20 can be placed in the lower shell 303, and the upper shell 302 and the lower shell 303 are locked to complete the tightening of the stator assembly 20, thereby completing the assembly of the motor 100, and the assembly of the motor 100 is simple.

[0073] See also Figure 7 and Figure 8 as well as Fig.10 The stator assembly 20 includes a plurality of coil windings 201 and a plurality of wire blocking members 202 that are spaced apart along the circumference of the motor housing 30. One wire blocking member 202 is disposed between any adjacent coil windings 201.

[0074] As described above, a wire blocking member 202 is disposed between any adjacent coil windings 201 , and the wire blocking member 202 can prevent the coil windings 201 from falling apart.

[0075] In addition, shock absorbing members 40 are arranged at intervals in the circumferential direction of the motor 100 .

[0076] See also Figure 5 The present application discloses a food processor. The food processor includes a blending cup 200, a knife assembly 300, and any of the aforementioned motors 100. The motor 100 drives the knife assembly 300 to rotate in the blending cup 200. The motor 100 can drive the knife assembly 300 in one of the following ways: 1) by connecting between clutches, the motor 100 drives the knife assembly 300; 2) the motor 100 is directly connected to the knife assembly 300 to drive the knife assembly 300; 3) the motor 100 and the knife assembly 300 are driven by magnetic force.

[0077] As configured above, the food processor at least has the beneficial effects of the rotor assembly 10 or the motor 100 .

[0078] The above description is only a preferred implementation mode of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A rotor assembly, characterized in that: The rotor assembly comprises: Motor shaft (1); An upper end piece (2) fixed to the motor shaft (1); A lower end piece (3) is fixed to the motor shaft (1) and is spaced apart from the upper end piece (2) in the axial direction of the motor shaft (1); A magnet (4) or a coil winding, fixed to the motor shaft (1) and located between the upper end piece (2) and the lower end piece (3); At least one of the upper end piece (2) and the lower end piece (3) comprises fan blades (21), and the fan blades (21) are arranged at intervals in the circumferential direction of the motor shaft (1).

2. The rotor assembly according to claim 1, characterized in that: The fan blades (21) are arranged at intervals to form a connecting groove (23), and the connecting groove (23) is connected to the outside of the rotor assembly (10). The width of the connecting groove (23) gradually decreases along a direction approaching an edge of the rotor assembly (10).

3. The rotor assembly according to claim 1 or 2, characterized in that: The projection of the fan blade (21) on the radial plane of the motor shaft (1) is in the shape of a trapezoid, and the lower base of the trapezoid is farther away from the motor shaft (1) than the upper base.

4. The rotor assembly according to claim 1, characterized in that: The fan blades (21) are arranged at intervals to form a connecting groove (23), the connecting groove (23) is connected to the outside of the rotor assembly (10), and the width of the connecting groove (23) along the radial direction of the rotor assembly is equal; And / or, the projection of the fan blade (21) on the radial plane of the motor shaft (1) is arc-shaped, or square-shaped.

5. A motor, characterized in that: The motor comprises a rotor assembly (10), a stator assembly (20) and a motor housing (30) according to any one of claims 1 to 4, wherein: The motor housing (30) comprises a receiving cavity (301); The stator assembly (20) is located in the accommodating cavity (301); The rotor assembly (10) is located in the accommodating cavity (301) and is rotatably connected to the motor housing (30); The motor housing (30) is also provided with an air outlet (304), and the wind generated by the fan blades (21) is discharged from the air outlet (304).

6. The motor according to claim 5, characterized in that There are a plurality of air outlets (304), which are evenly spaced and distributed around the circumference of the motor shaft (1); And / or, the motor housing (30) comprises an upper housing (302) and a lower housing (303), the upper housing (302) and the lower housing (303) forming the accommodating chamber (301), the upper housing (302) and the lower housing (303) being respectively provided with the air outlet (304), and the air outlet (304) being spaced apart in the axial direction of the motor shaft (1).

7. The motor according to claim 6, characterized in that The air outlet (304) is in a trapezoidal shape, and the lower base of the trapezoid is farther away from the center of the motor housing than the upper base.

8. The motor according to claim 5, characterized in that The motor housing (30) comprises an upper housing (302) and a lower housing (303), wherein the upper housing (302) and the lower housing (303) constitute the accommodating cavity (301) and are respectively provided with a bearing installation cavity (3021); the motor (100) comprises bearings (305) connected to the motor shaft (1) and spaced apart in the axial direction of the motor shaft (1); the spaced apart bearings (305) are respectively fixed in the bearing installation cavity (3021), and the stator assembly (20) is pressed against the upper housing (302) and the lower housing (303).

9. The motor according to claim 5, characterized in that The stator assembly (20) comprises a plurality of coil windings (201) and a plurality of wire blocking members (202) which are spaced apart and distributed along the circumference of the motor housing (30), and a wire blocking member (202) is provided between any adjacent coil windings (201).

10. A food processor, characterized in that: The food processor comprises a blending cup (200), a knife assembly (300), and a motor (100) according to any one of claims 5 to 9, wherein the motor (100) drives the knife assembly (300) to rotate in the blending cup (200).

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