Support, stator assembly and motor

Abstract

The invention provides a support, a stator assembly and a motor, and relates to the technical field of motors. The support comprises a shaft sleeve structure used for being connected with the supporting shaft. The fixing structure is arranged on the peripheral side of the shaft sleeve structure, the fixing structure and the shaft sleeve structure are spaced, the fixing structure and the shaft sleeve structure share the axis, and the fixing structure is used for connecting a stator; the supporting structure is located between the shaft sleeve structure and the fixing structure and connected with the shaft sleeve structure and the fixing structure; wherein a plurality of first communicating holes distributed around the shaft sleeve structure are formed in the supporting structure, heat dissipation structures are arranged in the first communicating holes, one ends of the heat dissipation structures are connected with the supporting structure, and the other ends of the heat dissipation structures are suspended.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular, to a bracket, a stator assembly, and a motor. Background Art

[0002] Currently, the heat dissipation design of motors has received increasing attention because temperature rise is a key factor restricting the cost reduction, efficiency improvement, and compact design of motors. Due to its compact structure, high output torque, and high efficiency, the outer rotor motor is increasingly applied to products such as electric vehicles and fans. Since the stator assembly of the outer rotor motor is inside and the rotor assembly is outside, it is more difficult for the heat generated by the stator assembly to dissipate to the environment during motor operation.

[0003] In the related art, there are ways to enhance the heat dissipation of the stator assembly, such as potting the stator assembly with a high thermal conductivity material, burying a heat transfer medium pipeline in the stator assembly, and designing a special-shaped stator to increase the heat dissipation area. However, these technical solutions either increase the cost of the motor or affect the performance of the motor to a certain extent.

[0004] Therefore, how to overcome the above technical defects has become an urgent technical problem to be solved. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] To this end, a first aspect of the present invention provides a bracket.

[0007] A second aspect of the present invention provides a stator assembly.

[0008] A third aspect of the present invention provides a motor.

[0009] In view of this, a first aspect of the present invention provides a bracket, which includes: a bushing structure for connecting and supporting a shaft; a fixing structure provided on the periphery of the bushing structure, spaced apart from the bushing structure, and sharing the same axis with the bushing structure, for connecting the stator; a supporting structure located between the bushing structure and the fixing structure and connecting the bushing structure and the fixing structure; wherein, a plurality of first communication holes are formed in the supporting structure and distributed around the bushing structure, a heat dissipation structure is arranged in the first communication holes, one end of the heat dissipation structure is connected to the supporting structure, and the other end is suspended.

[0010] This technical solution provides a bracket applied to an outer rotor motor, which is used to position and support the rotor on the motor.

[0011] Specifically, the bracket includes a bushing structure, a fixing structure, and a supporting structure. A through shaft hole is provided on the bushing structure, and the shaft hole is configured to allow a support shaft to penetrate. The support shaft penetrating through the shaft hole provides support for the bracket by contacting the bushing structure. The fixing structure is annular, and the fixing structure is arranged on the circumferential side of the bushing structure. The fixing structure and the bushing structure share the same axis, and there is a gap between the fixing structure and the bushing structure. The fixing structure is configured to connect the stator. The supporting structure is arranged in the gap between the bushing structure and the fixing structure. The inner ring of the supporting structure is connected to the outer ring surface of the bushing structure, and the outer ring of the supporting structure is connected to the inner ring surface of the fixing structure to connect the bushing structure and the fixing structure into one body. The bushing structure provides support for the stator through the supporting structure and the fixing structure, so that the stator can be stably held in a predetermined working position.

[0012] For a motor with the stator on the inner side and the rotor on the outer side, the heat on the stator arranged on the inner side needs to diffuse outward across the rotor with the same high temperature on the outer side. It is difficult for the heat to diffuse outward, so that the working temperature of the stator cannot be effectively controlled, resulting in problems of high failure rate and low energy efficiency in the associated motor.

[0013] In this regard, the heat dissipation structure includes a first communication hole, and the first communication hole is provided on the supporting structure and penetrates the supporting structure.

[0014] By providing the first communication hole on the supporting structure, a heat dissipation air flow penetrating the supporting structure can be formed in the first communication hole. During the process of flowing through the first communication hole, the heat dissipation air flow will carry away part of the heat on the supporting structure, playing a role in accelerating the rate of heat diffusion of the supporting structure outward, thereby improving the heat dissipation efficiency of the supporting structure.

[0015] On this basis, the bracket proposed in this application is provided with a heat dissipation structure in the first communication hole. One end of the heat dissipation structure is connected to the support structure, and the other end is suspended. The heat dissipation structure can dissipate heat from the support structure to accelerate the rate of heat diffusion from the support structure to the external space. During operation, the heat on the high-temperature stator is transferred to the support structure through the fixing structure, causing the support structure to heat up synchronously. On this basis, by providing a heat dissipation structure on the support structure, the rate of heat diffusion from the support structure to the outside can be increased, so that the support structure can be maintained at a lower temperature, thereby accelerating the rate of heat transfer from the stator to the support structure, indirectly realizing the heat dissipation of the stator, and effectively controlling the operating temperature of the stator, solving the technical problem of difficult heat dissipation of the stator in the related art. At the same time, compared with the technical solutions of directly improving the shape of the stator or pouring heat-conducting materials and heat-conducting mechanisms into the stator, setting a heat dissipation structure on the support structure in this application will not interfere with the structure and inherent properties of the stator. On the one hand, the improvement cost is reduced, and on the other hand, the heat dissipation improvement can be avoided from damaging the performance of the motor, thus overcoming the technical defects in the related art. Furthermore, the technical effects of optimizing the motor heat dissipation structure, improving the motor heat dissipation efficiency, ensuring the motor energy efficiency, and prolonging the service life of the motor are achieved.

[0016] Specifically, the heat dissipation structure includes heat dissipation fins, a semiconductor refrigeration element, heat dissipation pipelines and other heat dissipation structures. This technical solution does not rigidly limit the specific structural form of the heat dissipation structure, as long as it can meet the requirement of providing heat dissipation for the support structure.

[0017] In addition, the above-mentioned bracket provided by the present invention may also have the following additional technical features:

[0018] In some technical solutions of the present invention, optionally, the heat dissipation structure further includes heat dissipation fins, which are connected to the support structure and located in the first communication hole.

[0019] In this technical solution, the heat dissipation structure further includes heat dissipation fins. The heat dissipation fins are arranged in the first communication hole and are connected to the support structure. During operation, the heat on the stator will be transferred to the heat dissipation fins through the support structure, and then the heat dissipation air flow flowing into the first communication hole will contact the heat dissipation fins and carry away the heat on the heat dissipation fins, thereby realizing the direct heat dissipation of the support structure and the indirect heat dissipation of the stator.

[0020] It can be seen that by arranging heat dissipation fins in the first communication hole, the heat dissipation effect can be improved by increasing the contact area, thereby improving the heat dissipation performance of the motor.

[0021] Specifically, the heat dissipation fins in the first communication hole are close to the side where the fixing structure is located, so that the heat transferred through the fixing structure can be preferentially transferred to the heat dissipation fins, thereby improving the heat dissipation effect.

[0022] In some technical solutions of the present invention, optionally, the heat dissipation structure further includes: a first heat dissipation rib, connected to the heat sink and / or the support structure, the first heat dissipation rib is located in the first communication hole, and the first heat dissipation rib extends in the radial direction of the bracket.

[0023] In this technical solution, the heat dissipation structure further includes a first heat dissipation rib, and the first heat dissipation rib can be provided independently or used in cooperation with the heat sink.

[0024] The first heat dissipation rib is arranged in the first communication hole. In the case where the first heat dissipation rib is provided independently, one end of the first heat dissipation rib is connected to the support structure, and the other end extends in the radial direction of the bracket in the first communication hole. In the case of being used in cooperation with the heat sink, one end of the first heat dissipation rib is connected to the heat sink, and the other end extends in the radial direction of the bracket in the first communication hole, that is, the first heat dissipation rib serves as an extension structure on the heat sink.

[0025] During the working process, the heat on the stator is transferred to the first heat dissipation rib through the support structure, and then the heat dissipation air flow flowing into the first communication hole will contact the first heat dissipation rib and carry away the heat on the first heat dissipation rib, thereby realizing the direct heat dissipation of the support structure and the indirect heat dissipation of the stator. At the same time, the spaces between the heat dissipation rib structures can reduce the blockage of the heat dissipation air flow while increasing the contact area.

[0026] It can be seen that by arranging the first heat dissipation rib in the first communication hole, the heat dissipation effect can be improved by increasing the contact area, and further the heat dissipation performance of the motor can be improved.

[0027] In some technical solutions of the present invention, optionally, each heat sink includes a plurality of first heat dissipation ribs; the plurality of first heat dissipation ribs are spaced apart.

[0028] In this technical solution, each heat sink is provided with a plurality of first heat dissipation ribs arranged side by side, and there is a gap for the heat dissipation air flow to flow between two adjacent first heat dissipation ribs.

[0029] By arranging a plurality of first heat dissipation ribs on each heat sink, the contact area between the heat dissipation air flow and the heat dissipation structure can be increased, so as to increase the heat carried away by the heat dissipation air flow, and further achieve the technical effect of improving the heat dissipation performance of the bracket.

[0030] In some technical solutions of the present invention, optionally, the heat dissipation structure further includes: a second heat dissipation rib, connected to the support structure and located in the first communication hole.

[0031] In this technical solution, the heat dissipation structure further includes a second heat dissipation rib, and the second heat dissipation rib is not used in cooperation with the heat sink. The second heat dissipation rib is independently arranged in the first communication hole. During the process of the heat dissipation air flow flowing in the first communication hole, it can carry away the heat on the second heat dissipation rib to improve the heat dissipation effect.

[0032] By providing the second heat dissipation rib, the heat exchange area of the heat dissipation air flow can be increased on the basis of the first communication hole, thereby improving the heat dissipation rate. By providing the second heat dissipation rib independently, the shielding of the first communication hole by the heat dissipation structure can be reduced to ensure the flow rate and velocity of the heat dissipation air flow.

[0033] In some technical solutions of the present invention, optionally, at least a part of the second heat dissipation rib extends in the tangential direction of the bracket; or there is an angle between the extending direction of the second heat dissipation rib and the radial direction of the bracket, and the angle is an acute angle.

[0034] In this technical solution, the shape of the second heat dissipation rib is defined. In the first case, at least a part of the second heat dissipation rib can extend in the tangential direction of the bracket to form a second heat dissipation rib arranged horizontally in the first communication hole to enhance the heat dissipation effect of the second heat dissipation rib.

[0035] In the second case, there is an angle between the extending direction of the second heat dissipation rib and the radial direction of the bracket. The specific angle value of this angle can change with the extension, but the angle of this angle remains within the acute angle range to distinguish the first case. This structure is beneficial to extending the length of the second heat dissipation rib in the first communication hole, thereby improving the heat dissipation effect by increasing the heat exchange area between the second heat dissipation rib and the heat dissipation air flow.

[0036] In some technical solutions of the present invention, optionally, the heat dissipation structure further includes: a third heat dissipation rib, connected to the heat dissipation fin, and the third heat dissipation rib extends in the axial direction of the bracket.

[0037] In this technical solution, the heat dissipation structure further includes a third heat dissipation rib. The third heat dissipation rib is connected to the heat dissipation fin and the third heat dissipation rib avoids the first communication hole.

[0038] The third heat dissipation rib extends in the axial direction of the bracket. Specifically, it can be arranged on the upwind side and / or the downwind side of the first communication hole. The heat dissipation air flow will contact the surface of the third heat dissipation rib before flowing into the first communication hole or after flowing through the first communication hole, thereby carrying away part of the heat on the third heat dissipation rib to accelerate the rate of heat transfer from the stator to the heat dissipation structure.

[0039] At the same time, the third heat dissipation rib extending in the axial direction of the bracket will not block the heat dissipation air flow in the first communication hole, which is beneficial to increasing the flow rate of the heat dissipation air flow and further improving the heat dissipation effect.

[0040] It can be seen that by providing the third heat dissipation rib on the heat dissipation fin, the heat dissipation effect can be improved by increasing the contact area, and further the heat dissipation performance of the motor can be improved.

[0041] In some technical solutions of the present invention, optionally, each heat dissipation fin includes a plurality of third heat dissipation ribs; the plurality of third heat dissipation ribs are spaced apart.

[0042] In this technical solution, a plurality of third heat dissipation ribs arranged side by side are provided on each heat sink, and there is a gap between two adjacent third heat dissipation ribs.

[0043] By providing a plurality of third heat dissipation ribs on each heat sink, the contact area between the heat dissipation air flow and the heat dissipation structure can be increased, so as to increase the heat carried away by the heat dissipation air flow, and further achieve the technical effect of improving the heat dissipation performance of the bracket.

[0044] In some technical solutions of the present invention, optionally, a plane perpendicular to the axis of the bracket is selected as the reference plane, and the axis direction of the bracket is selected as the projection direction, and the bracket is projected to obtain a first projection image; on the first projection image, the shadow area between the bushing structure and the fixing structure is the first area, and the total area of the area between the bushing structure and the fixing structure is the second area; the range of the ratio of the first area to the second area is: greater than 0.5 and less than or equal to 0.9.

[0045] In this technical solution, when only the first communication hole is provided on the bracket, a plane perpendicular to the axis of the bracket is selected as the reference plane for projection, and then the axis direction of the bracket is selected as the projection direction, and the bracket is projected onto the reference plane to form a first projection image on the reference plane.

[0046] Among them, on the first projection image, the darker area corresponds to the solid structures on the bracket: the bushing structure, the fixing structure, the support structure, the heat sink, the first heat dissipation rib, and the brighter area corresponds to the hollow structure on the bracket: the first communication hole.

[0047] On this basis, the inner darker ring corresponds to the bushing structure, the outer darker ring corresponds to the fixing structure, the area of the occluded area between the two rings is the first area, and the total area between the two rings is the second area, that is, the second area includes all the bright and dark areas.

[0048] Among them, the ratio of the first area to the second area needs to be greater than 0.5 and less than or equal to 0.9. By limiting the above area ratio, the size ratio of the solid structure and the hollow structure on the bracket can be reasonably allocated to ensure the structural strength of the bracket on the basis of ensuring the heat dissipation effect, so that the bracket can meet the heat dissipation requirements of the motor and the support requirements of the stator.

[0049] In some technical solutions of the present invention, optionally, the heat dissipation structure further includes: a second communication hole, provided in the support structure, and the second communication hole is located between two adjacent first communication holes along the circumferential direction of the bracket; the area of the second communication hole is smaller than the area of the first communication hole.

[0050] In this technical solution, the heat dissipation structure further includes a second communication hole. The first communication hole is provided on the support structure, and the second communication hole is arranged offset from the first communication hole in the circumferential direction of the bracket. Specifically, the second communication hole can be inserted between two adjacent first communication holes in the circumferential direction.

[0051] By providing the second communication hole on the support structure, it can cooperate with the first communication hole to enlarge the area of the hollowed-out area on the bracket, thereby increasing the flow rate of the heat dissipation air flow, increasing the contact area between the heat dissipation air flow and the support structure, so as to accelerate the rate of heat diffusion of the support structure outward and improve the heat dissipation efficiency of the support structure.

[0052] Among them, the area of the second communication hole is smaller than the area of the first communication hole. By defining this area relationship, on the one hand, the two types of communication holes can be distinguished, and on the other hand, the damage to the strength of the support structure caused by the second communication hole can be reduced, avoiding the possibility of the support structure being bent or even broken.

[0053] In some technical solutions of the present invention, optionally, the number of the first communication holes is N; the number of the second communication holes is N; N first communication holes and N second communication holes are alternately distributed around the bushing structure.

[0054] In this technical solution, the number of both the first communication holes and the second communication holes is N, and N is an integer greater than 1.

[0055] On this basis, N first communication holes and N second communication holes are alternately distributed around the bushing structure. By providing 2N first communication holes and second communication holes alternately distributed around the bushing structure, the heat dissipation uniformity and heat dissipation efficiency of the support structure can be improved, so as to keep the bracket and the stator at a lower temperature, and further achieve the technical effects of improving the heat dissipation performance of the motor and enhancing the safety and reliability of the motor.

[0056] In some technical solutions of the present invention, optionally, a plane perpendicular to the axis of the bracket is selected as the reference plane, and the axis direction of the bracket is selected as the projection direction, and the bracket is projected to obtain a second projection image; on the second projection image, the shaded area between the outer circumference of the bushing structure and the inner circumference of the fixed structure is the third area, and the total area of the area between the bushing structure and the fixed structure is the fourth area; the range of the ratio of the third area to the fourth area is: greater than or equal to 0.2 and less than or equal to 0.5.

[0057] In this technical solution, when the first communication hole and the second communication hole are provided on the bracket, a plane perpendicular to the axis of the bracket is selected as the reference plane for projection, and then the axis direction of the bracket is selected as the projection direction, and the bracket is projected onto the reference plane to form a second projection image on the reference plane.

[0058] Among them, on the second projection image, the darker areas correspond to the solid structures on the bracket: the bushing structure, the fixing structure, the supporting structure, the heat sink, and the first heat dissipation rib, and the brighter areas correspond to the hollow structures on the bracket: the first communication hole and the second communication hole.

[0059] On this basis, the darker inner ring corresponds to the bushing structure, the darker outer ring corresponds to the fixing structure, the area of the occluded area between the two rings is the third area, and the total area between the two rings is the fourth area, that is, the fourth area includes all the bright and dark areas.

[0060] Among them, the ratio of the third area to the fourth area needs to be greater than or equal to 0.2 and less than or equal to 0.5. By limiting the above area ratio, the size ratio of the solid structure and the hollow structure on the bracket can be reasonably allocated to ensure the structural strength of the bracket while ensuring the heat dissipation effect, so that the bracket can meet the heat dissipation requirements of the motor and the support requirements of the stator.

[0061] In some technical solutions of the present invention, optionally, in the radial direction from the bushing structure to the fixing structure, the width of the first communication hole gradually increases; and / or, in the radial direction from the bushing structure to the fixing structure, the width of the second communication hole gradually increases.

[0062] In this technical solution, the shapes of the first communication hole and the second communication hole are defined.

[0063] Specifically, in the radial direction from the bushing structure to the fixing structure, the width of the first communication hole gradually increases. During the working process, the heat of the stator is transferred from the outside of the supporting structure to the inside of the supporting structure. By increasing the width of the outer part of the first communication hole close to the outside, the heat dissipation effect on the outside of the supporting structure can be improved, so as to quickly diffuse the heat transferred to the supporting structure into the external environment, thereby improving the heat dissipation effect of the bracket.

[0064] Similarly, by increasing the width of the outer part of the second communication hole close to the outside, the heat dissipation effect on the outside of the supporting structure can be improved, so as to quickly diffuse the heat transferred to the supporting structure into the external environment, thereby improving the heat dissipation effect of the bracket.

[0065] In some technical solutions of the present invention, optionally, the supporting structure, the first communication hole and the heat dissipation structure are formed by stamping a sheet metal part; or the heat dissipation structure is integrally formed on the supporting structure by a casting process.

[0066] In this technical solution, the process of the heat dissipation structure is defined. Specifically, the heat dissipation structure can be formed by stamping a sheet metal part. Specifically, after selecting the sheet material for preparing the supporting structure, the hollow first communication hole and the internal heat sink and heat dissipation rib are directly formed by stamping process in the area where the first communication hole is located, so as to reduce the process complexity of the bracket and reduce the cost of the bracket.

[0067] Alternatively, the heat dissipation structure can be integrally formed on the support structure through a casting process, and the casting process can also have the technical effect of reducing the process complexity of the bracket and reducing the cost of the bracket.

[0068] In some technical solutions of the present invention, optionally, the fixed structure includes: a fixed outer ring connected to the supporting structure; a positioning portion, arranged on the fixed outer ring and located on the side of the fixed outer ring away from the sleeve structure, and the positioning portion is used to provide positioning for the stator.

[0069] In this technical solution, the fixed structure includes a fixed outer ring and a positioning part. The fixed outer ring is configured to be mounted on the stator, and the fixed outer ring can provide radial positioning for the outer stator. The positioning part is arranged on the outer ring side of the fixed outer ring, and the positioning part is configured to abut against the end face of the stator, so as to provide axial positioning for the stator through the positioning part, thereby achieving the technical effect of improving the positioning accuracy and positioning stability of the stator.

[0070] A second aspect of the present invention provides a stator assembly, which includes: a bracket as in any of the above technical solutions; a support shaft, which is inserted into the shaft sleeve structure; and a stator, which is sleeved on the circumference of the fixed structure.

[0071] In this technical solution, a stator assembly including the bracket in any of the above technical solutions is proposed. Therefore, the stator assembly has the advantages of the bracket in any of the above technical solutions, and the stator assembly can achieve the technical effects that can be achieved by the bracket in any of the above technical solutions.

[0072] On this basis, the stator assembly also includes a support shaft and a stator. The support shaft is inserted into the shaft sleeve structure, and the stator is sleeved on the fixed structure.

[0073] A third aspect of the present invention provides a motor, comprising: a stator assembly as in the above technical solution; and a rotor assembly, which is sleeved on the circumference of the stator assembly.

[0074] In this technical solution, a motor including the stator assembly in any of the above technical solutions is proposed. Therefore, the motor has the advantages of the stator assembly in any of the above technical solutions, and the motor can achieve the technical effects that can be achieved by the stator assembly in any of the above technical solutions.

[0075] On this basis, the motor also includes a rotor assembly, which is sleeved on the outside of the stator assembly. The rotor assembly can rotate under the action of the electromagnetic field generated by the stator assembly to convert electrical energy into mechanical energy.

[0076] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0078] Figure 1 shows a schematic structural view of a bracket according to an embodiment of the present invention;

[0079] Figure 2 shows a schematic structural view of a bracket according to an embodiment of the present invention;

[0080] Figure 3 shows a schematic structural view of a bracket according to an embodiment of the present invention;

[0081] Figure 4 shows a schematic structural view of a bracket according to an embodiment of the present invention;

[0082] Figure 5 shows a schematic structural view of a bracket according to an embodiment of the present invention;

[0083] Figure 6 shows a first projection image of a bracket according to an embodiment of the present invention;

[0084] Figure 7 shows a first projection image of a bracket according to an embodiment of the present invention;

[0085] Figure 8 shows a first projection image of a bracket according to an embodiment of the present invention;

[0086] Figure 9 shows a second projection image of a bracket according to an embodiment of the present invention;

[0087] Figure 10 shows a second projection image of a bracket according to an embodiment of the present invention;

[0088] Figure 11 shows a second projection image of a bracket according to an embodiment of the present invention;

[0089] Figure 12 shows a schematic structural view of a stator assembly according to an embodiment of the present invention;

[0090] Figure 13 shows a schematic structural view of a motor according to an embodiment of the present invention.

[0091] Wherein, Figures 1 to 13 the correspondence between the reference numerals in the

[0092] 100 Bracket, 110 Bush Structure, 120 Fixing Structure, 122 Fixing Outer Ring, 124 Positioning Portion, 130 Supporting Structure, 140 Heat Dissipation Structure, 142 First Communication Hole, 144 Heat Sink, 146 First Heat Dissipation Rib, 147 Second Heat Dissipation Rib, 148 Third Heat Dissipation Rib, 149 Second Communication Hole, 200 Stator Assembly, 210 Support Shaft, 220 Stator, 300 Motor, 310 Rotor Assembly. Detailed Embodiment

[0093] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0094] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0095] The following refers to Figures 1 to 13 Describe a bracket, a stator assembly and a motor according to some embodiments of the present invention.

[0096] As Figure 1 And Figure 2 As shown, an embodiment of the present invention provides a bracket 100, which includes: a bush structure 110 for connecting the support shaft 210; a fixing structure 120 provided on the periphery of the bush structure 110, the fixing structure 120 is spaced apart from the bush structure 110, and the fixing structure 120 and the bush structure 110 share the same axis, and the fixing structure 120 is used to connect the stator 220; a supporting structure 130 located between the bush structure 110 and the fixing structure 120 and connecting the bush structure 110 and the fixing structure 120; wherein, a plurality of first communication holes 142 distributed around the bush structure 110 are formed on the supporting structure 130, and a heat dissipation structure 140 is arranged in the first communication holes 142, one end of the heat dissipation structure 140 is connected to the supporting structure 130, and the other end is suspended.

[0097] Figure 1 Shows a schematic structural diagram of a bracket 100 according to an embodiment of the present invention, Figure 1 In which the arrow a shows the axial direction of the bracket 100, the arrow b shows the radial direction of the bracket 100, and the arrow c shows the circumferential direction of the bracket 100.

[0098] Figure 2 Shows a schematic structural diagram of a bracket according to an embodiment of the present invention, Figure 2Arrow b shows the radial direction of the bracket 100, and arrow c shows the circumferential direction of the bracket 100.

[0099] This embodiment provides a bracket 100 applied to an outer-rotor motor 300, and the bracket 100 is used to position and support the rotor on the motor 300.

[0100] Specifically, the bracket 100 includes a bushing structure 110, a fixing structure 120, and a supporting structure 130. A through shaft hole is provided on the bushing structure 110, and the shaft hole is configured to allow the support shaft 210 to penetrate. The support shaft 210 penetrating through the shaft hole provides support for the bracket 100 by contacting the bushing structure 110. The fixing structure 120 is annular, and the fixing structure 120 is arranged on the circumferential side of the bushing structure 110. The fixing structure 120 and the bushing structure 110 share the same axis, and there is a gap between the fixing structure 120 and the bushing structure 110. The fixing structure 120 is configured to connect to the stator 220. The supporting structure 130 is arranged in the gap between the bushing structure 110 and the fixing structure 120. The inner ring of the supporting structure 130 is connected to the outer ring surface of the bushing structure 110, and the outer ring of the supporting structure 130 is connected to the inner ring surface of the fixing structure 120 to connect the bushing structure 110 and the fixing structure 120 into one body. The bushing structure 110 provides support for the stator 220 through the supporting structure 130 and the fixing structure 120, so that the stator 220 can be stably maintained at a predetermined working position.

[0101] For the motor 300 with the stator 220 on the inner side and the rotor on the outer side, the heat on the stator 220 arranged on the inner side needs to diffuse outward across the rotor at the same high temperature on the outer side. It is difficult for the heat to diffuse outward, so that the working temperature of the stator 220 cannot be effectively controlled, resulting in problems of high failure rate and low energy efficiency in the associated motor 300.

[0102] In response, the heat dissipation structure 140 includes a first communication hole 142. The first communication hole 142 is provided on the supporting structure 130, and the first communication hole 142 penetrates through the supporting structure 130.

[0103] By providing the first communication hole 142 on the supporting structure 130, a heat dissipation air flow penetrating through the supporting structure 130 can be formed in the first communication hole 142. Part of the heat on the supporting structure 130 will be carried away during the process of the heat dissipation air flow flowing through the first communication hole 142, which plays a role in accelerating the rate of heat diffusion of the supporting structure 130 outward, thereby improving the heat dissipation efficiency of the supporting structure 130.

[0104] On this basis, the bracket 100 proposed in the present application is provided with a heat dissipation structure 140 in the first communication hole 142. One end of the heat dissipation structure 140 is connected to the support structure 130, and the other end is suspended. The heat dissipation structure 140 can dissipate heat from the support structure 130 to accelerate the rate of heat diffusion from the support structure 130 into the external space. During operation, the heat on the high-temperature stator 220 is transferred to the support structure 130 through the fixing structure 120, causing the support structure 130 to heat up synchronously. On this basis, by providing the heat dissipation structure 140 on the support structure 130, the rate of heat diffusion from the support structure 130 to the outside can be increased, enabling the support structure 130 to maintain a relatively low temperature, thereby accelerating the rate of heat transfer from the stator 220 to the support structure 130, indirectly realizing the heat dissipation of the stator 220, and effectively controlling the operating temperature of the stator 220, solving the technical problem of difficult heat dissipation of the stator 220 in the related art. At the same time, compared with the embodiments of directly improving the shape of the stator 220 or encapsulating heat-conducting materials and heat-conducting mechanisms in the stator 220, providing the heat dissipation structure 140 on the support structure 130 in the present application will not interfere with the structure and inherent properties of the stator 220. On the one hand, the improvement cost is reduced, and on the other hand, the performance of the motor 300 can be prevented from being damaged by the heat dissipation improvement, thus overcoming the technical defects in the related art. Furthermore, the technical effects of optimizing the heat dissipation structure of the motor 300, improving the heat dissipation efficiency of the motor 300, ensuring the energy efficiency of the motor 300, and extending the service life of the motor 300 are achieved.

[0105] Specifically, the heat dissipation structure 140 includes heat dissipation structures such as communication holes, heat dissipation fins, semiconductor refrigeration components, and heat dissipation pipelines. In this embodiment, the specific structural form of the heat dissipation structure 140 is not rigidly limited, as long as it can meet the requirement of providing heat dissipation for the support structure 130.

[0106] In addition, the above-mentioned bracket 100 provided by the present invention may also have the following additional technical features:

[0107] As Figure 1 shown, in some embodiments of the present invention, optionally, the number of the first communication holes 142 is N, where N is an integer greater than 1; the multiple first communication holes 142 are distributed around the bushing structure 110.

[0108] In this embodiment, the number of the first communication holes 142 is N, where N is an integer greater than 1.

[0109] On this basis, N first communication holes 142 are distributed at intervals around the bushing structure 110. By providing N first communication holes 142 surrounding the bushing structure 110, the heat dissipation uniformity and efficiency of the support structure 130 can be improved, so as to keep the bracket 100 and the stator 220 at a lower temperature, thereby achieving the technical effects of improving the heat dissipation performance of the motor 300 and enhancing the safety and reliability of the motor 300.

[0110] Specifically, the N first communication holes 142 are evenly distributed around the bushing assembly in the circumferential direction of the bracket 100, that is, they are distributed at equal angles. By evenly distributing the N first communication holes 142, on the one hand, the heat dissipation uniformity of the support structure 130 can be enhanced, and on the other hand, the force on the support structure 130 can be optimized, the stress concentration on the support structure 130 can be reduced, and the strength of the support structure 130 can be improved.

[0111] As Figure 1 shown, in some embodiments of the present invention, optionally, the heat dissipation structure 140 further includes: a heat sink 144, which is connected to the support structure 130 and is located within the first communication hole 142.

[0112] In this embodiment, the heat dissipation structure 140 further includes a heat sink 144. The heat sink 144 is disposed within the first communication hole 142, and the heat sink 144 is connected to the support structure 130. During operation, the heat on the stator 220 is transferred to the heat sink 144 through the support structure 130. Subsequently, the heat dissipation air flow flowing into the first communication hole 142 contacts the heat sink 144 and carries away the heat on the heat sink 144, thereby achieving direct heat dissipation of the support structure 130 and indirect heat dissipation of the stator 220.

[0113] It can be seen that by providing the heat sink 144 within the first communication hole 142, the heat dissipation effect can be improved by increasing the contact area, thereby enhancing the heat dissipation performance of the motor 300.

[0114] Specifically, the heat sink 144 in the first communication hole 142 is close to the side where the fixing structure 120 is located, so that the heat transferred through the fixing structure 120 can be preferentially transferred to the heat sink 144, thereby improving the heat dissipation effect.

[0115] As Figure 1 shown, in some embodiments of the present invention, optionally, the heat dissipation structure 140 further includes: a first heat dissipation rib 146, which is connected to the heat sink 144 and / or the support structure 130. The first heat dissipation rib 146 is located within the first communication hole 142, and the first heat dissipation rib 146 extends in the radial direction of the bracket 100.

[0116] In this embodiment, the heat dissipation structure 140 further includes a first heat dissipation rib 146. The first heat dissipation rib 146 can be provided separately or used in combination with the heat sink 144.

[0117] The first heat dissipation rib 146 is disposed in the first communication hole 142. When the first heat dissipation rib 146 is disposed independently, one end of the first heat dissipation rib 146 is connected to the support structure 130, and the other end extends in the radial direction of the bracket 100 in the first communication hole 142. When used in cooperation with the heat sink 144, one end of the first heat dissipation rib 146 is connected to the heat sink 144, and the other end extends in the radial direction of the bracket 100 in the first communication hole 142, that is, the first heat dissipation rib 146 serves as an extension structure on the heat sink 144.

[0118] During operation, the heat on the stator 220 is transferred to the first heat dissipation rib 146 through the support structure 130. Subsequently, the heat dissipation air flow flowing into the first communication hole 142 contacts the first heat dissipation rib 146 and carries away the heat on the first heat dissipation rib 146, thereby realizing direct heat dissipation of the support structure 130 and indirect heat dissipation of the stator 220. At the same time, the spaces between the heat dissipation rib structures can reduce the blockage of the heat dissipation air flow while increasing the contact area.

[0119] It can be seen that by disposing the first heat dissipation rib 146 in the first communication hole 142, the heat dissipation effect can be improved by increasing the contact area, and further the heat dissipation performance of the motor 300 can be improved.

[0120] As Figure 1 shown, in some embodiments of the present invention, optionally, each heat sink 144 includes a plurality of first heat dissipation ribs 146; the plurality of first heat dissipation ribs 146 are spaced apart.

[0121] In this embodiment, a plurality of first heat dissipation ribs 146 arranged side by side are disposed on each heat sink 144, and there is a gap for the heat dissipation air flow to flow between two adjacent first heat dissipation ribs 146.

[0122] By disposing a plurality of first heat dissipation ribs 146 on each heat sink 144, the contact area between the heat dissipation air flow and the heat dissipation structure 140 can be increased, so that the heat carried away by the heat dissipation air flow is increased, and further the technical effect of improving the heat dissipation performance of the bracket 100 is achieved.

[0123] As Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 shown, in some embodiments of the present invention, optionally, the heat dissipation structure 140 further includes: a second heat dissipation rib 147, connected to the support structure 130 and located in the first communication hole 142.

[0124] Figure 6 Fig. shows a first projection image of the bracket 100 according to an embodiment of the present invention.

[0125] Figure 7 Shows a first projection image of the stent 100 according to an embodiment of the present invention.

[0126] Figure 8 Shows a first projection image of the stent 100 according to an embodiment of the present invention.

[0127] Figure 9 Shows a second projection image of the stent 100 according to an embodiment of the present invention.

[0128] Figure 10 Shows a second projection image of the stent 100 according to an embodiment of the present invention.

[0129] Figure 11 Shows a second projection image of the stent 100 according to an embodiment of the present invention.

[0130] In this embodiment, the heat dissipation structure 140 further includes a second heat dissipation rib 147. The second heat dissipation rib 147 is not used in cooperation with the heat sink 144. The second heat dissipation rib 147 is separately arranged in the first communication hole 142. During the process of the heat dissipation air flow flowing in the first communication hole 142, the heat on the second heat dissipation rib 147 can be carried away to improve the heat dissipation effect.

[0131] By providing the second heat dissipation rib 147, the heat exchange area of the heat dissipation air flow can be increased on the basis of the first communication hole 142, thereby improving the heat dissipation rate. By separately providing the second heat dissipation rib 147, the shielding of the first communication hole 142 by the heat dissipation structure 140 can be reduced to ensure the flow rate and velocity of the heat dissipation air flow.

[0132] In some embodiments of the present invention, optionally, at least a part of the second heat dissipation rib 147 extends in the tangential direction of the stent 100; or there is an included angle between the extending direction of the second heat dissipation rib 147 and the radial direction of the stent 100, and the included angle is an acute angle.

[0133] In this embodiment, the shape of the second heat dissipation rib 147 is defined. In the first case, at least a part of the second heat dissipation rib 147 can extend in the tangential direction of the stent 100 to form a laterally arranged second heat dissipation rib 147 in the first communication hole 142 to enhance the heat dissipation effect of the second heat dissipation rib 147.

[0134] In the second case, there is an angle between the extending direction of the second heat dissipation rib 147 and the radial direction of the bracket 100. The specific angle value of this angle can change as it extends, but the angle of this angle remains within the acute angle range to distinguish it from the first case. This structure is beneficial to extend the length of the second heat dissipation rib 147 in the first communication hole 142, thereby improving the heat dissipation effect by increasing the heat exchange area between the second heat dissipation rib 147 and the heat dissipation air flow.

[0135] As Figure 5 shown, in some embodiments of the present invention, optionally, the heat dissipation structure 140 further includes: a third heat dissipation rib 148, connected to the heat dissipation fin 144, and the third heat dissipation rib 148 extends in the axial direction of the bracket 100.

[0136] Figure 5 FIG. shows a schematic structural diagram of the bracket 100 according to an embodiment of the present invention.

[0137] In this embodiment, the heat dissipation structure 140 further includes a third heat dissipation rib 148. The third heat dissipation rib 148 is connected to the heat dissipation fin 144 and the third heat dissipation rib 148 avoids the first communication hole 142.

[0138] The third heat dissipation rib 148 extends in the axial direction of the bracket 100. Specifically, it can be arranged on the upwind side and / or the downwind side of the first communication hole 142. Before the heat dissipation air flow flows into the first communication hole 142 or after flowing through the first communication hole 142, it will contact the surface of the third heat dissipation rib 148, thereby carrying away part of the heat on the third heat dissipation rib 148 to accelerate the rate of heat transfer from the stator 220 to the heat dissipation structure 140.

[0139] At the same time, the third heat dissipation rib 148 extending in the axial direction of the bracket 100 will not block the heat dissipation air flow in the first communication hole 142, which is beneficial to increasing the flow rate of the heat dissipation air flow and further improving the heat dissipation effect.

[0140] It can be seen that by providing the third heat dissipation rib 148 on the heat dissipation fin 144, the heat dissipation effect can be improved by increasing the contact area, and further the heat dissipation performance of the motor 300 can be improved.

[0141] As Figure 5 shown, in some embodiments of the present invention, optionally, each heat dissipation fin 144 includes a plurality of third heat dissipation ribs 148; the plurality of third heat dissipation ribs 148 are spaced apart.

[0142] In this embodiment, each heat dissipation fin 144 is provided with a plurality of third heat dissipation ribs 148 arranged side by side, and there is a gap between two adjacent third heat dissipation ribs 148.

[0143] By arranging a plurality of third heat dissipation ribs 148 on each heat sink 144, the contact area between the heat dissipation air flow and the heat dissipation structure 140 can be increased, so as to increase the heat carried away by the heat dissipation air flow, and further achieve the technical effect of improving the heat dissipation performance of the bracket 100.

[0144] As Figure 6 , Figure 7 and Figure 8 shown, in some embodiments of the present invention, optionally, a plane perpendicular to the axis of the bracket 100 is selected as the reference plane, and the axis direction of the bracket 100 is selected as the projection direction, and the bracket 100 is projected to obtain a first projection image; on the first projection image, the shaded area between the bushing structure 110 and the fixing structure 120 is the first area, and the total area of the area between the bushing structure 110 and the fixing structure 120 is the second area; the range of the ratio of the first area to the second area is: greater than 0.5 and less than or equal to 0.9.

[0145] In this embodiment, when only the first communication hole 142 is provided on the bracket 100, a plane perpendicular to the axis of the bracket 100 is selected as the reference plane for projection, and then the axis direction of the bracket 100 is selected as the projection direction, and the bracket 100 is projected onto the reference plane to form a first projection image on the reference plane.

[0146] Among them, on the first projection image, the darker area corresponds to the solid structures on the bracket 100: the bushing structure 110, the fixing structure 120, the support structure 130, the heat sink 144, and the first heat dissipation rib 146, and the brighter area corresponds to the hollow structure on the bracket 100: the first communication hole 142.

[0147] On this basis, the inner darker ring corresponds to the bushing structure 110, the outer darker ring corresponds to the fixing structure 120, the area of the occluded area between the two rings is the first area, and the total area between the two rings is the second area, that is, the second area includes all bright and dark areas.

[0148] Among them, the ratio of the first area to the second area needs to be greater than 0.5 and less than or equal to 0.9. By limiting the above area ratio, the size ratio of the solid structure and the hollow structure on the bracket 100 can be reasonably allocated to ensure the structural strength of the bracket 100 on the basis of ensuring the heat dissipation effect, so that the bracket 100 can meet the heat dissipation requirements of the motor 300 and the support requirements of the stator 220.

[0149] As Figure 3 and Figure 4As shown, in some embodiments of the present invention, optionally, the heat dissipation structure 140 further includes: a second communication hole 149 provided in the support structure 130, and the second communication hole 149 is located between two first communication holes 142 adjacent in the circumferential direction of the bracket 100; the area of the second communication hole 149 is smaller than the area of the first communication hole 142.

[0150] Figure 3 FIG. shows a schematic structural diagram of a bracket 100 according to an embodiment of the present invention.

[0151] Figure 4 FIG. shows a schematic structural diagram of a bracket 100 according to an embodiment of the present invention.

[0152] In this embodiment, the heat dissipation structure 140 further includes a second communication hole 149. The first communication holes 142 are provided on the support structure 130, and the second communication hole 149 and the first communication holes 142 are arranged in a staggered manner in the circumferential direction of the bracket 100. Specifically, the second communication hole 149 can be arranged between two adjacent first communication holes 142 in the circumferential direction.

[0153] By providing the second communication hole 149 on the support structure 130, it can cooperate with the first communication holes 142 to increase the area of the hollowed-out area on the bracket 100, thereby increasing the flow rate of the heat dissipation air flow and increasing the contact area between the heat dissipation air flow and the support structure 130, so as to accelerate the rate of heat dissipation of the support structure 130 to the outside and improve the heat dissipation efficiency of the support structure 130.

[0154] Among them, the area of the second communication hole 149 is smaller than the area of the first communication hole 142. By defining this area relationship, on the one hand, the two types of communication holes can be distinguished, and on the other hand, the damage to the strength of the support structure 130 caused by the second communication hole 149 can be reduced, and the possibility of the support structure 130 being bent or even broken can be avoided.

[0155] Such as Figure 3 As shown, in some embodiments of the present invention, optionally, the number of the first communication holes 142 is N; the number of the second communication holes 149 is N; the N first communication holes 142 and the N second communication holes 149 are alternately distributed around the bushing structure 110.

[0156] In this embodiment, the number of both the first communication holes 142 and the second communication holes 149 is N, and N is an integer greater than 1.

[0157] On this basis, N first communication holes 142 and N second communication holes 149 are alternately distributed around the bushing structure 110. By providing 2N first communication holes 142 and second communication holes 149 that are alternately distributed around the bushing structure 110, the heat dissipation uniformity and heat dissipation efficiency of the support structure 130 can be improved, so as to keep the bracket 100 and the stator 220 at a lower temperature, thereby achieving the technical effects of improving the heat dissipation performance of the motor 300 and enhancing the safety and reliability of the motor 300.

[0158] As Figure 9 , Figure 10 and Figure 11 shown, in some embodiments of the present invention, optionally, a plane perpendicular to the axis of the bracket 100 is selected as the reference plane, and the axis direction of the bracket 100 is selected as the projection direction, and the bracket 100 is projected to obtain a second projection image; on the second projection image, the shaded area between the outer periphery of the bushing structure 110 and the inner periphery of the fixing structure 120 is the third area, and the total area of the region between the bushing structure 110 and the fixing structure 120 is the fourth area; the range of the ratio of the third area to the fourth area is: greater than or equal to 0.2 and less than or equal to 0.5.

[0159] In this embodiment, when the first communication holes 142 and the second communication holes 149 are provided on the bracket 100, a plane perpendicular to the axis of the bracket 100 is selected as the reference plane for projection, and then the axis direction of the bracket 100 is selected as the projection direction, and the bracket 100 is projected onto the reference plane to form a second projection image on the reference plane.

[0160] Among them, on the second projection image, the darker areas correspond to the solid structures on the bracket 100: the bushing structure 110, the fixing structure 120, the support structure 130, the heat sink 144, and the first heat dissipation rib 146, and the brighter areas correspond to the hollow structures on the bracket 100: the first communication holes 142 and the second communication holes 149.

[0161] On this basis, the inner darker ring corresponds to the bushing structure 110, the outer darker ring corresponds to the fixing structure 120, the area of the occluded region between the two rings is the third area, and the total area between the two rings is the fourth area, that is, the fourth area includes all bright and dark regions.

[0162] Among them, the ratio of the third area to the fourth area needs to be greater than or equal to 0.2 and less than or equal to 0.5. By limiting the above area ratio, the size ratio of the solid structure and the hollow structure on the bracket 100 can be reasonably allocated, so as to ensure the structural strength of the bracket 100 on the basis of ensuring the heat dissipation effect, so that the bracket 100 can meet the heat dissipation requirements of the motor 300 and the support requirements of the stator 220.

[0163] As Figure 1 ,Figure 3 and Figure 5 As shown, in some embodiments of the present invention, optionally, in the radial direction from the sleeve structure 110 to the fixed structure 120, the width of the first connecting hole 142 gradually increases; in the radial direction from the sleeve structure 110 to the fixed structure 120, the width of the second connecting hole 149 gradually increases.

[0164] In this embodiment, the shapes of the first communication hole 142 and the second communication hole 149 are defined.

[0165] Specifically, the width of the first communication hole 142 gradually increases in the radial direction from the sleeve structure 110 to the fixed structure 120. During operation, the heat of the stator 220 is transferred from the outer side of the support structure 130 to the inner side of the support structure 130. By increasing the width of the first communication hole 142 near the outer side, the heat dissipation effect of the outer side of the support structure 130 can be improved, so as to diffuse the heat transferred to the support structure 130 to the external environment as quickly as possible, thereby improving the heat dissipation effect of the bracket 100.

[0166] Similarly, by increasing the width of the second connecting hole 149 near the outer portion, the heat dissipation effect on the outer side of the support structure 130 can be improved, so as to diffuse the heat transferred to the support structure 130 to the external environment as quickly as possible, thereby improving the heat dissipation effect of the bracket 100.

[0167] In some embodiments of the present invention, optionally, the support structure 130, the first connecting hole 142 and the heat dissipation structure 140 are formed by stamping sheet metal parts; or the heat dissipation structure 140 is integrally formed with the support structure 130 by a casting process.

[0168] In this embodiment, the process of the heat dissipation structure 140 is limited. Specifically, the heat dissipation structure 140 can be formed by stamping a sheet metal part. Specifically, after selecting a sheet material for preparing the support structure 130, the hollow first connecting hole 142 and the internal heat dissipation fins 144 and heat dissipation ribs are directly formed by a stamping process in the area where the first connecting hole 142 is located, so as to reduce the process complexity of the bracket 100 and reduce the cost of the bracket 100.

[0169] Alternatively, the heat dissipation structure 140 can be integrally formed on the support structure 130 through a casting process, and the casting process can also play a technical effect of reducing the process complexity of the bracket 100 and reducing the cost of the bracket 100.

[0170] like Figure 1 As shown, in some embodiments of the present invention, optionally, the fixed structure 120 includes: a fixed outer ring 122, connected to the support structure 130; a positioning portion 124, provided on the fixed outer ring 122 and located on the side of the fixed outer ring 122 away from the sleeve structure 110, and the positioning portion 124 is used to provide positioning for the stator 220.

[0171] In this embodiment, the fixing structure 120 includes a fixing outer ring 122 and a positioning portion 124. The fixing outer ring 122 is configured to be sleeved by the stator 220, and the fixing outer ring 122 can provide radial positioning for the outer stator 220. The positioning portion 124 is disposed on the outer ring side of the fixing outer ring 122, and the positioning portion 124 is configured to abut against the end face of the stator 220, so as to provide axial positioning for the stator 220 through the positioning portion 124, thereby achieving the technical effects of improving the positioning accuracy and positioning stability of the stator 220.

[0172] Specifically, the bracket 100 is made by sheet metal process, or the bracket 100 is made by casting process.

[0173] As Figure 12 shown, an embodiment of the present invention provides a stator assembly 200, and the stator assembly 200 includes: the bracket 100 in any of the above embodiments; a support shaft 210 passing through the bushing structure 110; and a stator 220 sleeved on the periphery of the fixing structure 120.

[0174] Figure 12 Fig. shows a schematic structural diagram of a stator assembly 200 according to an embodiment of the present invention.

[0175] In this embodiment, a stator assembly 200 including the bracket 100 in any of the above embodiments is proposed. Therefore, the stator assembly 200 has the advantages of the bracket 100 in any of the above embodiments, and the stator assembly 200 can achieve the technical effects that the bracket 100 in any of the above embodiments can achieve.

[0176] On this basis, the stator assembly 200 further includes a support shaft 210 and a stator 220. The support shaft 210 is disposed through the bushing structure 110, and the stator 220 is sleeved on the fixing structure 120.

[0177] As Figure 13 shown, an embodiment of the present invention provides a motor 300, and the motor 300 includes: the stator assembly 200 in the above embodiment; and a rotor assembly 310 sleeved on the periphery of the stator assembly 200.

[0178] Figure 13 Fig. shows a schematic structural diagram of a motor 300 according to an embodiment of the present invention.

[0179] In this embodiment, a motor 300 including the stator assembly 200 in any of the above embodiments is proposed. Therefore, the motor 300 has the advantages of the stator assembly 200 in any of the above embodiments, and the motor 300 can achieve the technical effects that the stator assembly 200 in any of the above embodiments can achieve.

[0180] On this basis, the motor 300 further includes a rotor assembly 310. The rotor assembly 310 is sleeved outside the stator assembly 200. The rotor assembly 310 can rotate under the action of the electromagnetic field generated by the stator assembly 200 to convert electrical energy into mechanical energy.

[0181] It should be clear that in the claims, the specification and the drawings of the present invention, the term "a plurality of" means two or more, unless otherwise explicitly defined. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. This is only for more conveniently describing the present invention and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on the present invention; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances of the above data.

[0182] In the claims, the specification and the drawings of the present invention, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, the specification and the drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0183] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bracket, characterized in that, Comprising: A bushing structure for connecting and supporting a shaft; A fixing structure provided on the circumferential side of the bushing structure, the fixing structure being spaced apart from the bushing structure and sharing the same axis with the bushing structure, and the fixing structure being used for connecting a stator; A supporting structure located between the bushing structure and the fixing structure and connecting the bushing structure and the fixing structure; Wherein, a plurality of first communication holes are formed in the supporting structure and are distributed around the bushing structure, a heat dissipation structure is arranged in the first communication holes, one end of the heat dissipation structure is connected to the supporting structure, and the other end is suspended.

2. The bracket according to claim 1, wherein, The heat dissipation structure includes: Heat dissipation fins connected to the supporting structure and located in the first communication holes.

3. The bracket according to claim 2, characterized in that, The heat dissipation structure further includes: First heat dissipation ribs connected to the heat dissipation fins and / or the supporting structure, the first heat dissipation ribs being located in the first communication holes and extending in the radial direction of the bracket.

4. The bracket according to claim 3, wherein Each of the heat dissipation fins includes a plurality of the first heat dissipation ribs; The plurality of first heat dissipation ribs are spaced apart.

5. The bracket according to claim 1, characterized in that, The heat dissipation structure further includes: Second heat dissipation ribs connected to the supporting structure and located in the first communication holes.

6. The bracket according to claim 5, wherein At least a part of the second heat dissipation ribs extends in the tangential direction of the bracket; or There is an included angle between the extending direction of the second heat dissipation ribs and the radial direction of the bracket, and the included angle is an acute angle.

7. The bracket according to claim 2, characterized in that, The heat dissipation structure further includes: Third heat dissipation ribs connected to the heat dissipation fins, and the third heat dissipation ribs extend in the axial direction of the bracket.

8. The bracket according to claim 7, wherein Each of the heat dissipation fins includes a plurality of the third heat dissipation ribs; The plurality of third heat dissipation ribs are spaced apart.

9. The bracket according to claim 1, wherein Select a plane perpendicular to the axis of the bracket as the reference plane, and select the axis direction of the bracket as the projection direction, and project the bracket to obtain a first projection image; On the first projection image, the shaded area between the bushing structure and the fixing structure is the first area, and the total area of the region between the bushing structure and the fixing structure is the second area; The range of the ratio of the first area to the second area is: greater than 0.5 and less than or equal to 0.

9.

10. The bracket according to claim 1, characterized in that, The heat dissipation structure further includes: Second communication holes provided in the supporting structure, and the second communication holes are located between two adjacent first communication holes along the circumferential direction of the bracket; The area of the second communication holes is smaller than the area of the first communication holes.

11. The bracket according to claim 10, wherein The number of the first communication holes is N; The number of the second communication holes is N; The N first communication holes and the N second communication holes are alternately distributed around the bushing structure.

12. The bracket according to claim 10, wherein Selecting a plane perpendicular to the axis of the bracket as a reference plane, selecting the axis direction of the bracket as a projection direction, and projecting the bracket to obtain a second projection image; On the second projection image, a shadow area between the outer periphery of the sleeve structure and the inner periphery of the fixing structure is a third area, and a total area of ​​the region between the sleeve structure and the fixing structure is a fourth area; The ratio of the third area to the fourth area is in the range of greater than or equal to 0.2 and less than or equal to 0.

5.

13. The bracket according to claim 10, characterized in that: In the radial direction from the sleeve structure to the fixing structure, the width of the first communicating hole increases gradually; and / or, In the radial direction from the sleeve structure to the fixing structure, the width of the second communicating hole increases gradually.

14. The support according to any one of claims 1 to 13, characterized in that The supporting structure, the first connecting hole and the heat dissipation structure are formed by stamping sheet metal parts; or The heat dissipation structure is integrally formed on the supporting structure through a casting process.

15. The stent according to any one of claims 1 to 13, characterized in that, The fixed structure comprises: A fixed outer ring connected to the support structure; A positioning portion is provided on the fixed outer ring and is located on a side of the fixed outer ring away from the sleeve structure, and the positioning portion is used to provide positioning for the stator.

16. A stator assembly, characterized in that, include: The bracket according to any one of claims 1 to 15; A supporting shaft is inserted into the shaft sleeve structure; The stator is sleeved on the peripheral side of the fixed structure.

17. A motor, characterized in that, include: The stator assembly according to claim 16; The rotor assembly is sleeved on the circumference of the stator assembly.

Images