Motor driving assembly and electrical product

Abstract

The utility model provides a motor driving assembly and an electrical product. By means of the embedded integrated structure of the impeller and the rotor frame, miniaturization of the motor driving assembly can be achieved, in addition, the distance between the impeller and the circuit board is reduced through the structure, the heat dissipation effect of the impeller on the circuit board is improved, and meanwhile noise can be reduced through the integrated structure.

Description

Technical Field

[0001] The utility model relates to the field of electromechanical technology, and particularly relates to a motor drive assembly and an electrical product. Background Art

[0002] With the development of science and technology, motors are more and more widely used in many electrical products. These electrical products can be, for example, devices or components containing motors, such as any vehicle-mounted device, household electrical appliance, office automation device, industrial device, transportation device or components in the device.

[0003] In the existing motor structure, the motor has a stator, a rotor, and a circuit board located on one axial side of the stator and the rotor and electrically connected to the stator.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely explaining the technical solution of the present utility model and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art just because these solutions are described in the background art part of the present utility model. Summary of the Utility Model

[0005] The inventor found that in the existing structure, the stator, rotor and impeller of the motor are assembled axially separately, resulting in the inability to miniaturize the motor. On the other hand, during the use of the motor, since there is a large distance between the impeller and the circuit board after assembly, it is not conducive to the impeller to dissipate heat from the circuit board. In addition, the gaps generated by the connection of each component will increase the noise during the use of the motor.

[0006] In order to solve one or more of the above problems or other similar problems, embodiments of the present utility model provide a motor drive assembly and an electrical product. Through the embedded integrated structure of the impeller and the rotor frame, the miniaturization of the motor drive assembly can be achieved. In addition, the above structure reduces the distance between the impeller and the circuit board, improves the heat dissipation effect of the impeller on the circuit board, and at the same time, the integrated structure can reduce the generation of noise.

[0007] According to one aspect of the embodiments of the present utility model, a motor drive assembly is provided, and the motor drive assembly includes:

[0008] A rotor, which includes a rotating shaft rotating around a central axis, magnets arranged circumferentially on the rotating shaft, and a rotor frame fixing the magnets;

[0009] A stator, which is radially opposed to the rotor;

[0010] A mounting plate, which axially supports the stator and has a plurality of mounting portions extending radially;

[0011] A circuit board, which is axially disposed on a side of the mounting plate close to the stator and is electrically connected to the stator; and

[0012] An impeller, which is an integral structure with the rotor bracket, and the rotor bracket is embedded in the impeller.

[0013] In some embodiments, the impeller has: a fixing portion, which is fixedly connected to the rotor bracket; a disk portion, which extends radially outward from the fixing portion; and blades, which are disposed on an axial side of the disk portion and are arranged circumferentially, and the fixing portion, the disk portion, and the blades are an integral structure.

[0014] In some embodiments, a plurality of suction holes are circumferentially and equally spaced on the disk portion.

[0015] In some embodiments, the number of the suction holes is different from the number of the mounting portions of the mounting plate.

[0016] In some embodiments, the disk portion has a curved surface portion, and the plurality of suction holes are circumferentially arranged along the curved surface portion.

[0017] In some embodiments, a plurality of through holes are formed in the rotor bracket in the circumferential direction,

[0018] The fixing portion of the impeller passes through the rotor bracket through the through holes and axially clamps the rotor bracket.

[0019] In some embodiments, the fixing portion includes a first clamping portion and a second clamping portion that axially clamp the rotor bracket,

[0020] A plurality of convex portions penetrating through the plurality of through holes are formed between the first clamping portion and the second clamping portion.

[0021] In some embodiments, the rotor bracket has a top surface, and a plurality of heat dissipation holes are arranged on the circumference of the top surface.

[0022] In some embodiments, a protrusion is provided on at least one of the plurality of mounting portions.

[0023] In some embodiments, the number of the mounting portions is three, the mounting portions are circumferentially spaced, and the circumferential angles between each pair of adjacent mounting portions among the three mounting portions are different from each other.

[0024] In some embodiments, an annular member is provided on the circumferential outer side of the blade.

[0025] In some embodiments, dynamic balance correction components are provided at some positions in the circumferential direction of the annular component, or, the annular component is partially missing in the circumferential direction, or, the outer edge of the disc portion is partially missing in the circumferential direction.

[0026] In some embodiments, the mounting portion has a bent structure with a height difference in the axial direction; the bent structure is provided on the radially outer side of the impeller, and the crease of the bent structure is located at a position parallel or coincident with the tangent of the annular component.

[0027] According to another aspect of the embodiments of the present invention, there is provided an electrical product, which includes the motor drive assembly described in any aspect of the above embodiments.

[0028] One of the beneficial effects of the embodiments of the present invention is that through the embedded integrated structure of the impeller and the rotor frame, miniaturization of the motor drive assembly can be achieved. In addition, the above structure reduces the distance between the impeller and the circuit board, improves the heat dissipation effect of the impeller on the circuit board, and at the same time, the integrated structure can reduce noise generation.

[0029] Referring to the following description and the accompanying drawings, the embodiments of the present invention are disclosed in detail. It should be understood that the embodiments of the present invention are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents.

[0030] Features described and / or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or replace features in other embodiments.

[0031] It should be emphasized that the terms "comprising / including / having" when used herein refer to the presence of features, whole parts, or components, but do not exclude the presence or addition of one or more other features, whole parts, or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] From the following detailed description in conjunction with the accompanying drawings, the above and other objects, features, and advantages of the embodiments of the present invention will become more apparent. In the drawings:

[0033] Figure 1 is a perspective view of the front of the motor drive assembly according to an embodiment of the present invention;

[0034] Figure 2 is a perspective view of the back of the motor drive assembly according to an embodiment of the present invention;

[0035] Figure 3 is a cross-sectional view of the motor drive assembly according to an embodiment of the present invention;

[0036] Figure 4 is a schematic diagram of the impeller of an embodiment of the present utility model;

[0037] Figure 5 is a schematic diagram of the rotor bracket of an embodiment of the present utility model;

[0038] Figure 6 is another schematic diagram of the rotor bracket of an embodiment of the present utility model;

[0039] Figure 7 is a cross-sectional view of the integrated structure of the impeller and the rotor bracket of an embodiment of the present utility model;

[0040] Figure 8 is a bottom view of the motor drive assembly of an embodiment of the present utility model;

[0041] Figure 9 is a schematic diagram of the impeller dynamic balance correction structure of an embodiment of the present utility model;

[0042] Figure 10 is another schematic diagram of the impeller dynamic balance correction structure of an embodiment of the present utility model. Detailed implementation manners

[0043] Referring to the accompanying drawings and through the following description, the foregoing and other features of the present utility model will become apparent. In the description and drawings, specific embodiments of the present utility model are specifically disclosed, which show some embodiments in which the principles of the present utility model can be adopted. It should be understood that the present utility model is not limited to the described embodiments. On the contrary, the present utility model includes all modifications, variations, and equivalents falling within the scope of the appended claims.

[0044] In the embodiments of the present utility model, the term "and / or" includes any one and all combinations of one or more of the related listed terms. The terms "comprising", "including", "having", etc. mean the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0045] In the embodiments of the present utility model, the singular forms "a", "the", etc. may include the plural forms and should be broadly understood as "one kind" or "one type" rather than being limited to the meaning of "one"; in addition, the term "the" should be understood to include both the singular form and the plural form unless otherwise clearly indicated by the context. In addition, the term "according to" should be understood as "at least partially according to...", and the term "based on" should be understood as "at least partially based on...", unless otherwise clearly indicated by the context.

[0046] In addition, in the following description of the present utility model, for the convenience of description, the direction extending along the central axis CC' of the motor or the direction parallel thereto is referred to as "axial direction", the radial direction centered on the central axis is referred to as "radial direction", the direction around the central axis is referred to as "circumferential direction", the side away from the central axis along the radial direction is referred to as "radial outer side", and the side close to the central axis along the radial direction is referred to as "radial inner side". It should be noted that the definitions of the respective directions in the present utility model are only for the convenience of describing the embodiments of the present utility model, and do not limit the directions of the motor drive assembly, the motor, the electrical product, etc. during use and manufacturing.

[0047] The following describes the implementation manners of the embodiments of the present utility model with reference to the drawings.

[0048] Embodiments of the first aspect

[0049] Figure 1 is a perspective view of the front of the motor drive assembly according to an embodiment of the present utility model; Figure 2 is a perspective view of the back of the motor drive assembly according to an embodiment of the present utility model; Figure 3 is a cross-sectional view of the motor drive assembly according to an embodiment of the present utility model.

[0050] As Figure 1 、 Figure 2 and Figure 3 shown, the motor drive assembly 100 includes: a rotor 1 (shown in Figure 1 and Figure 2 ), a stator 2 (shown in Figure 2 ), a mounting plate 3, a circuit board 4, and an impeller 5.

[0051] The rotor 1 includes: a rotating shaft 11 that rotates about a central axis (for example, CC' shown in Figure 1 ), magnets 12 arranged in the circumferential direction of the rotating shaft 11 (as shown in Figure 3 ), and a rotor frame 13 that fixes the magnets; the rotor frame 13 is connected to the rotating shaft 11 and rotates together with the rotating shaft 11. The stator 2 (as shown in Figure 3 ) is opposed to the rotor 1 in the radial direction. For example, the stator 2 is located on the radial inner side of the rotor 1, or the stator 2 is located on the radial outer side of the rotor 1; the mounting plate 3 axially supports the stator 2 and has a plurality of mounting portions 31 extending in the radial direction; the circuit board 4 is axially arranged on the side of the mounting plate 3 close to the stator 2 and is electrically connected to the stator 2; the impeller 5 is an integral structure with the rotor frame 13, and the rotor frame 13 is embedded in the impeller 5.

[0052] As Figure 2 and Figure 3As shown, the rotor frame 13 is embedded in the part of the impeller 5 near the rotation axis 11 that rotates around the center, and is integrally formed with the impeller 5 in an embedded manner. For example, during the manufacturing process, the impeller 5 and the rotor frame 13 are manufactured as an integral structure through insert molding. The components are more compact, avoiding the frictional contact between the impeller 5 and the rotor frame 13 caused by the split structure of the impeller 5 and the rotor frame 13 during the operation of the motor drive assembly 100.

[0053] Moreover, the stator 2, the circuit board 4, and the mounting plate 3 are sequentially arranged along one axial side ( Figure 3 side C in ) inside the motor drive assembly 100. The radial outer side of the impeller 5 away from the central axis directly faces the circuit board 4, and the distance between the impeller 5 and the circuit board 4 is H (as Figure 3 shown). In the structure where the impeller 5 and the rotor frame 13 are integrated, this distance H is reduced. For example, in the traditional split structure, this distance H is 12.2 mm, and in the integrated structure of the embodiment of the present invention, this distance H is 5.6 mm. In the integrated structure, when the rotor frame 13 rotates with the rotation axis 11, the impeller 5 can also rotate with the rotation axis 11. The reduction of the distance H between the impeller 5 and the circuit board 4 can increase the air volume blown towards the circuit board 4 and increase the heat dissipation area.

[0054] Therefore, through the embedded integrated structure of the impeller 5 and the rotor frame 13, the miniaturization of the motor drive assembly 100 can be achieved. In addition, the above structure reduces the distance between the impeller 5 and the circuit board 4, improves the heat dissipation effect of the impeller 5 on the circuit board 4, and at the same time, the integrated structure can reduce the generation of noise.

[0055] In some embodiments, the materials of the impeller 5 and the rotor frame 13 are different.

[0056] For example, the rotor frame 13 is made of a metal material and the impeller 5 is made of a non-metal material. For example, the material of the rotor frame 13 is metal and the material of the impeller 5 is resin, but the present invention is not limited thereto.

[0057] Figure 4 is a schematic diagram of the impeller in an embodiment of the present invention; Figure 4 (A) of shows a perspective view of the front of the impeller, Figure 4 (B) of shows a perspective view of the back of the impeller.

[0058] In some embodiments, the impeller 5 has: a fixing portion 51, a disk portion 52, and blades 53. The fixing portion 51 is fixedly connected to the rotor frame 13, and the disk portion 52 extends radially outward from the fixing portion 51; the blades 53 are arranged on one axial side of the disk portion 52 and are arranged circumferentially. The fixing portion 51, the disk portion 52, and the blades 53 are of an integral structure.

[0059] As Figure 1 and Figure 4 shown, near the radial inner side of the impeller 5 close to the rotating shaft 11, there is an opening 54, a fixing part 51 is formed along the opening 54, the rotor frame 13 is fixedly connected through the fixing part 51, a part of the upper surface of the rotor frame 13 can be exposed from the opening 54, the impeller 5 extends a disc part 52 from the fixing part 51 radially outward away from the rotating shaft 11, and on the lower surface of one axial side ( Figure 1 side C in ), a plurality of blades 53 are formed along the axial direction and arranged at equal intervals in the circumferential direction.

[0060] Thus, through the integrated structure of the impeller 5, the stability and balance during the rotation of the impeller 5 can be improved, and the noise generated under the working state can be further reduced.

[0061] In some embodiments, a plurality of suction holes 521 are arranged at equal intervals in the circumferential direction on the disc part 52.

[0062] As Figure 1 and Figure 4 (A) shown, a plurality of suction holes 521 are arranged at equal intervals in the circumferential direction on one side of the disc part 52 close to the fixing part 51, and the lower surface of the part of the disc part 52 where the plurality of suction holes 521 are arranged is the part where no blade 53 is formed. Or, the lower surface of the part of the disc part 52 where the plurality of suction holes 521 are arranged is the part where some blades 53 are formed.

[0063] In addition, the number of the suction holes 521 can be set according to the actual situation. For example, the number of the suction holes 521 is more than 2, Figure 4 taking 4 as an example. In addition, the shape of the suction holes 521 can also be designed according to the actual situation.

[0064] By arranging a plurality of suction holes 521 in the circumferential direction on the disc part 52, a circulating flow of air can be generated through the suction holes 521. Thus, more gas is blown into the interior of the motor drive assembly 100, and the heat dissipation effect is further improved.

[0065] In some embodiments, the number of the suction holes 521 is different from the number of the mounting parts 31 of the mounting plate 3.

[0066] As Figure 1 shown, 4 suction holes 521 are arranged in the circumferential direction on the disc part 52 of the impeller 5, while 3 mounting parts 31 are arranged on one axial side, and the number of the suction holes 521 is different from the number of the mounting parts 31.

[0067] By setting the number of the suction holes 521 to be different from that of the mounting parts 31, resonance generated between the components in the motor drive assembly 100 can be avoided.

[0068] In some embodiments, the disc portion 52 has a curved surface portion, and a plurality of air suction holes 521 are arranged along the circumferential direction of the curved surface portion.

[0069] As Figure 1 and Figure 4 shown in (A) of, a curved surface portion 523 is formed along the circumferential direction on the side of the disc portion 52 close to the fixing portion 51. The plurality of air suction holes 521 are arranged along the circumferential direction of the curved surface portion 523.

[0070] Thus, by arranging the plurality of air suction holes 521 on the smooth curved surface portion 523 of the disc portion 52, the air suction efficiency of the air suction holes 521 can be improved, and the generation of turbulent flow and noise can be prevented.

[0071] Figure 5 is a schematic diagram of a rotor bracket according to an embodiment of the present invention. Figure 5 (A) of shows a perspective view of the front of the rotor bracket. Figure 5 (B) of shows a perspective view of the back of the rotor bracket. Figure 6 is another schematic diagram of a rotor bracket according to an embodiment of the present invention. Figure 6 (A) of shows a perspective view of the front of the rotor bracket. Figure 6 (B) of shows a perspective view of the back of the rotor bracket.

[0072] In some embodiments, the rotor bracket 13 is formed with a plurality of through holes 131 in the circumferential direction. Referring to Figure 1 shown, the fixing portion 51 of the impeller 5 passes through the rotor bracket 13 through the through holes 131 and clamps the rotor bracket 13 in the axial direction.

[0073] As Figure 5 and Figure 6 shown, a plurality of through holes 131 are arranged at intervals along the circumferential direction on the radial outer side of the rotor bracket 13. As Figure 1 shown, when the impeller 5 and the rotor bracket 13 form an integrated embedding structure, the impeller 5 fixes the rotor bracket 13 through the fixing portion 51, and the inside of the embedded impeller 5 is fixed to the fixing portion 51 through the through holes 131 ( Figure 1 not shown in), forming an integrated structure in which the impeller 5 clamps the rotor bracket 13 in the axial direction.

[0074] Thus, the fixing portion 51 of the impeller 5 passes through the rotor bracket 13 through the through holes 131 on the rotor bracket 13 and clamps the rotor bracket 13 in the axial direction. Thus, a stable integrated structure of the impeller 5 and the rotor bracket 13 can be formed.

[0075] In some embodiments, the rotor bracket 13 has a top surface 133, and a plurality of heat dissipation holes 132 are arranged on the circumferential direction of the top surface 133.

[0076] As Figure 1and Figure 5 As shown in Figure 5 , the rotor bracket 13 forms a top surface 133 along the rotation axis 11 toward the radially outer side. The top surface 133 is exposed from the opening 54 of the impeller 5, and a plurality of heat dissipation holes 132 are formed in the circumferential direction of the top surface 133. The number of the heat dissipation holes 132 is two or more, and they are arranged at equal or unequal intervals in the circumferential direction of the top surface 133.

[0077] In addition, the specific number and shape of the heat dissipation holes can be set according to the actual situation, and the embodiments of the present utility model do not limit this.

[0078] Thus, by providing a plurality of heat dissipation holes 132 on the top surface 133 of the rotor bracket 13, the air inside the rotor bracket 13 can form a circulating flow with the external air, accelerating the flow of the air around the motor drive assembly 100, and further improving the heat dissipation effect of the motor drive assembly 100.

[0079] In some embodiments, as Figure 6 shown, the top surface 133 of the rotor bracket 13 can be a structure without heat dissipation holes.

[0080] Figure 7 is a cross-sectional view of the integrated structure of the impeller and the rotor bracket according to the embodiment of the present utility model.

[0081] In some embodiments, the fixing portion 51 includes a first clamping portion 511 and a second clamping portion 512 that axially clamp the rotor bracket 13, and a plurality of convex portions 513 penetrating through the plurality of through holes 131 are formed between the first clamping portion 511 and the second clamping portion 512.

[0082] As Figure 6 shown, a plurality of through holes 131 are arranged at intervals in the circumferential direction on the radially outer side of the rotor bracket 13. Combining Figure 1 shown, the fixing portion 51 of the impeller 5 is fixed to the rotor bracket 13 through the through holes 131. Combining Figure 7 shown, the fixing portion 51 of the impeller 5 has a first clamping portion 511 on the other side (C' side) in the axial direction and a second clamping portion 512 on one side (C side) in the axial direction. The first clamping portion 511 and the second clamping portion 512 extend in the circumferential direction to form two parallel surfaces. When the rotor bracket 13 is inserted into the inside of the impeller 5, a plurality of convex portions 513 between the first clamping portion 511 and the second clamping portion 512 can penetrate through the plurality of through holes 131 of the rotor bracket 13 to form an integrated structure of the rotor bracket 13 and the impeller 5.

[0083] The above describes the structure and the positional relationship of the internal components of the integrated structure of the rotor bracket 13 and the impeller 5. Next, an exemplary description will be given of the forming process in which the fixing portion 51 of the impeller 5 axially clamps the rotor bracket 13 through the through holes 131.

[0084] During the integral embedding molding process of the impeller 5 and the rotor bracket 13, resin is injected into the mold. Through the mold, the impeller 5 with a fixing portion 51, a disk portion 52, and blades 53 is integrally formed, and the rotor bracket 13 is embedded into the impeller 5. During the injection molding process, the resin forms a first clamping portion 511. At the same time, the resin is injected into the plurality of through holes 131 of the rotor bracket 13. The mold provided below the rotor bracket 13 then forms the resin overflowing from the through holes 131 into a second clamping portion 512, thereby embedding the rotor bracket 13 into the impeller 5 to form an integral structure.

[0085] Thus, the fixing portion 51 with an upper and lower two-layer structure is formed by the first clamping portion 511 and the second clamping portion 512, and a plurality of convex portions 513 penetrating through a plurality of through holes are formed between the first clamping portion 511 and the second clamping portion 512. The rotor bracket 13 is clamped by such a structure. Thus, the circumferential stability of the integral structure of the impeller 5 and the rotor bracket 13 can be further improved.

[0086] Figure 8 It is a bottom-up view of the motor drive assembly according to an embodiment of the present invention.

[0087] In some embodiments, at least one of the plurality of mounting portions 31 is provided with a protrusion 312.

[0088] As Figure 8 shown, the mounting plate 3 has a plurality of mounting portions 31-1, 31-2, and 31-3. The mounting portion 31-1 is provided with a protrusion 312, and the mounting portions 31-2 and 31-3 are not provided with protrusions 312. The specific position, shape of the protrusion 312 provided on the mounting portion, and on which specific mounting portion to set can be selected according to actual situations, and are not limited here.

[0089] Thus, by providing the protrusion 312 on at least one mounting portion 31-1, installation errors generated during the installation of the motor drive assembly 100 can be prevented.

[0090] In some embodiments, the number of the mounting portions 31 is three. The mounting portions 31 are circumferentially spaced, and the circumferential angles between each pair of adjacent mounting portions 31 among the three mounting portions 31 are different from each other.

[0091] As Figure 8 shown, there are 3 mounting plates 3, which are respectively the mounting portions 31-1, 31-2, and 31-3. The mounting portions 31-1, 31-2, and 31-3 are circumferentially spaced to form a triangular mounting structure. Among them, the angles between the mounting portion 31-1 and the mounting portion 31-2, between the mounting portion 31-2 and the mounting portion 31-3, and between the mounting portion 31-3 and the mounting portion 31-1 are different from each other.

[0092] For example, starting clockwise from one side of the circuit board 4, the included angle between the mounting part 31-2 and the mounting part 31-3 is 100°, the included angle between the mounting part 31-3 and the mounting part 31-1 is 120°, and the included angle between the mounting part 31-1 and the mounting part 31-2 is 140°. That is, the included angle between two adjacent mounting parts 31 increases by 20° in sequence according to the clockwise order. The specific degree of the included angle can be set according to the actual situation, and the embodiments of the present invention do not limit this.

[0093] Therefore, the triangular mounting structure can improve the strength of the mounting plate 3, improve the mounting stability, and set the included angle between every two mounting parts 31 to different angles, which can prevent the occurrence of installation errors.

[0094] In some embodiments, as Figure 4 shown, a ring-shaped component 531 is provided on the circumferential outer side of the blade 53.

[0095] Therefore, the ring-shaped component 531 can increase the strength of the impeller 5.

[0096] Figure 9 is a schematic diagram of the impeller dynamic balance correction structure of the embodiment of the present invention; Figure 9 (A) of [Figure number] shows a perspective view of the front of the impeller, Figure 9 and (B) of [Figure number] shows a perspective view of the back of the impeller. Figure 10 is another schematic diagram of the impeller dynamic balance correction structure of the embodiment of the present invention; Figure 10 and (A) of [Figure number] shows a perspective view of the front of the impeller, Figure 10 and (B) of [Figure number] shows a perspective view of the back of the impeller.

[0097] In some embodiments, the ring-shaped component 531 is provided with a dynamic balance correction component at some positions in the circumferential direction, or the ring-shaped component 531 is partially missing in the circumferential direction, or the outer edge of the disc part 52 is partially missing in the circumferential direction.

[0098] For example, as Figure 9 shown, a balance clip 6 is provided on the circumference of the ring-shaped component 531 of the blade 53, and the dynamic balance is corrected by increasing the weight at some positions in the circumferential direction. In addition, other dynamic balance correction components can also be used, and the embodiments of the present invention do not limit this.

[0099] For another example, a notch is provided on the circumference of the ring-shaped component 531 of the blade 53. By providing a notch (not shown) in the ring-shaped component 531 at some positions in the circumferential direction, the dynamic balance is corrected by reducing the weight at some positions in the circumferential direction.

[0100] For still another example, as Figure 10As shown, one or more notches 522 are formed by partially missing the outer edge of the disc portion 52 in the circumferential direction. The dynamic balance is corrected by reducing the weight at the partially circumferential position. In addition, the shape and number of the notches 522 can be set according to the actual situation, and the embodiments of the present invention do not limit this.

[0101] Thus, by adding components or reducing components, the dynamic balance can be flexibly corrected.

[0102] In some embodiments, the mounting portion 31 has a bent structure 313 with a height difference in the axial direction; the bent structure 313 is provided on the radially outer side of the impeller 5, and the crease of the bent structure 313 is located at a position parallel to or coincident with the tangent of the annular member 531.

[0103] For example, as Figure 1 and Figure 8 shown, the crease of the bent structure 313 is located at a position parallel to the tangent of the annular member 531 and close to coincident with the tangent.

[0104] Thus, the bent structure 313 can improve the strength of the triangular mounting plate and facilitate installation; and by setting the bent structure 313 at a position parallel to or coincident with the tangent of the ring member 531, the air output of the impeller 5 can be increased, and the noise can be further reduced.

[0105] According to the above embodiments, through the embedded integrated structure of the impeller 5 and the rotor frame 13, the miniaturization of the motor drive assembly 100 can be achieved. In addition, the above structure reduces the distance between the impeller 5 and the circuit board 4, improves the heat dissipation effect of the impeller 5 on the circuit board 4, and at the same time, the integrated structure can reduce the generation of noise.

[0106] Embodiments of the second aspect

[0107] The embodiments of the present invention provide an electrical product, which includes the motor drive assembly 100 described in the embodiments of the first aspect. Since the structure of the motor drive assembly 100 has been described in the embodiments of the first aspect, its content is incorporated herein and will not be repeated here.

[0108] Through the electrical product of the embodiments of the present invention, since the motor drive assembly described in the embodiments of the first aspect is adopted, through the embedded integrated structure of the impeller and the rotor frame, the miniaturization of the motor drive assembly can be achieved. In addition, the above structure reduces the distance between the impeller and the circuit board, improves the heat dissipation effect of the impeller on the circuit board, and at the same time, the integrated structure can reduce the generation of noise.

[0109] In this embodiment, the electrical product can be any electrical product that uses a motor drive component. For example, it can be a device or component that includes a motor, such as any on-vehicle device, household electrical appliance, office automation device, industrial device, transportation device, or a component in a device. The present utility model is not limited to these products.

[0110] The present utility model has been described above in conjunction with specific embodiments, but those skilled in the art should clearly understand that these descriptions are exemplary and not a limitation on the protection scope of the present utility model. Those skilled in the art can make various modifications and variations to the present utility model according to the spirit and principle of the present utility model, and these modifications and variations are also within the scope of the present utility model.

Claims

1. A motor drive assembly, characterized in that, The motor drive assembly includes: A rotor, which includes a rotating shaft that rotates around a central axis, magnets circumferentially arranged on the rotating shaft, and a rotor frame that fixes the magnets; A stator, which is radially opposed to the rotor; A mounting plate, which axially supports the stator and has a plurality of mounting portions extending radially; A circuit board, which is axially arranged on a side of the mounting plate close to the stator and is electrically connected to the stator; and An impeller, which has an integral structure with the rotor frame, and the rotor frame is embedded in the impeller.

2. The motor drive assembly according to claim 1, wherein: The impeller has: A fixing portion, which is fixedly connected to the rotor frame; A disc portion, which extends radially outward from the fixing portion; Blades, which are arranged on an axial side of the disc portion and are arranged circumferentially, The fixing portion, the disc portion, and the blades are of an integral structure.

3. The motor drive assembly according to claim 2, wherein: The disc portion is circumferentially provided with a plurality of suction holes at equal intervals.

4. The motor drive assembly according to claim 3, wherein: The number of the suction holes is different from the number of the mounting portions of the mounting plate.

5. The motor drive assembly according to claim 3, wherein: The disc portion has a curved surface portion, and the plurality of suction holes are arranged along the circumference of the curved surface portion.

6. The motor drive assembly according to claim 2, wherein: The rotor frame is formed with a plurality of through holes in the circumferential direction, The fixing portion of the impeller passes through the rotor frame through the through holes and axially clamps the rotor frame.

7. The motor drive assembly according to claim 6, wherein: The fixing portion includes a first clamping portion and a second clamping portion that axially clamp the rotor frame, A plurality of convex portions penetrating through the plurality of through holes are formed between the first clamping portion and the second clamping portion.

8. The motor drive assembly according to claim 2, wherein: The rotor frame has a top surface, and a plurality of heat dissipation holes are arranged on the circumference of the top surface.

9. The motor drive assembly according to claim 1, wherein: At least one of the plurality of mounting portions is provided with a protrusion.

10. The motor drive assembly according to claim 1, wherein: The number of the mounting portions is three, The mounting portions are circumferentially spaced apart, and the circumferential angles between each pair of adjacent mounting portions among the three mounting portions are different from each other.

11. The motor drive assembly according to claim 2, wherein: A ring-shaped member is arranged on the circumferential outer side of the blade.

12. The motor drive assembly according to claim 11, wherein: A dynamic balance correction member is arranged at a partial position in the circumferential direction of the ring-shaped member, or a part of the ring-shaped member is missing in the circumferential direction, or a part of the outer edge of the disc portion is missing in the circumferential direction.

13. The motor drive assembly according to claim 11, wherein: The mounting portion has a bent structure with a height difference in the axial direction; The bending structure is arranged on the radial outer side of the impeller, and the crease of the bending structure is located at a position parallel to or coincident with the tangent line of the annular component.

14. An electrical product, characterized in that, The electrical product includes the motor drive assembly according to any one of claims 1 to 13.

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