Dynamic balance plate, rotor assembly, motor and electric equipment

Abstract

The utility model relates to the technical field of motor manufacturing, and discloses a dynamic balance plate, a rotor assembly, a motor and electric equipment, the dynamic balance plate is provided with a first cooling flow channel, the dynamic balance plate comprises a bearing part and an injection molding part which are connected, and the injection molding part defines at least part of the first cooling flow channel. The utility model provides a dynamic balance plate, a rotor assembly, a motor and electric equipment, and can solve the problems that processing of a cooling flow channel on a dynamic balance plate is relatively troublesome and the cost is relatively high in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor manufacturing, and in particular to a dynamic balancing plate, a rotor assembly, a motor and an electrical equipment. BACKGROUND

[0002] A motor generally comprises a stator assembly and a rotor assembly capable of rotating relative to the stator. The rotor assembly comprises a rotating shaft and a rotor core fixedly sleeved on the rotating shaft. In order to eliminate the vibration and noise of the motor caused by the unbalance rotation of the rotor assembly and prolong the service life of the motor, a dynamic balancing plate is often arranged at both ends of the rotor core.

[0003] With the increasing demand for motor power density and motor efficiency in application fields such as new energy vehicles, it is required that the motor used in new energy vehicles has higher peak torque, power density and motor efficiency in a smaller volume. However, the motor application conditions are complex and various, the rotating speed and torque range are wide, the highest rotating speed is high, and the motor load is large, which causes serious heating. On the one hand, it affects the continuous output capacity of the motor, and on the other hand, it affects the durability life of the motor. Therefore, improving the cooling efficiency of the rotor assembly is very important to improve the continuous capacity of the motor and improve the safety of the motor.

[0004] A conventional cooling method is to arrange a cooling flow channel for flowing of cooling liquid in the rotor core and the dynamic balancing plate. As an important component of the rotor assembly, the dynamic balancing plate is often an important part of the rotor cooling flow channel, and is usually the reversing, inlet and outlet of the cooling flow channel. As a part for ensuring the dynamic balance of the rotor assembly, the dynamic balancing plate is often made of steel, copper or aluminum, which has a large density. It is troublesome and costly to process the cooling flow channel on the dynamic balancing plate. SUMMARY

[0005] The present application provides a dynamic balancing plate, a rotor assembly, a motor and an electrical equipment, which can solve the problem of troublesome and high cost of processing the cooling flow channel on the dynamic balancing plate in the related art.

[0006] In a first aspect, an embodiment of the present application provides a dynamic balancing plate, which is provided with a first cooling flow channel. The dynamic balancing plate comprises a bearing member and an injection molding member connected with each other, and the injection molding member defines at least part of the first cooling flow channel.

[0007] The dynamic balancing plate provided by the embodiment of the present application has the beneficial effects that the dynamic balancing plate in the embodiment of the present application comprises the bearing member and the injection molding member connected with each other. When the injection molding member is made by injection molding, at least part of the first cooling flow channel of the dynamic balancing plate can be made at the same time, so that the manufacturing process of the first cooling flow channel is relatively simple and the cost is relatively low. Meanwhile, the bearing member can ensure that the dynamic balancing plate has a certain strength, and the injection molding member can make the weight of the dynamic balancing plate lighter, so that the dynamic balancing plate meets the use requirements.

[0008] In some embodiments, the carrier is provided with a limiting groove, and the injection molding part is at least partially accommodated in the limiting groove.

[0009] In some embodiments, the carrier is provided with a first connecting part, and the injection molding part is provided with a second connecting part, which is matched with the first connecting part.

[0010] In some embodiments, one of the first connecting part and the second connecting part is provided as a recess, and the other of the first connecting part and the second connecting part is provided as a protrusion, which is accommodated in the recess.

[0011] In some embodiments, a plurality of the first connecting parts and a plurality of the second connecting parts are provided in one-to-one correspondence, and the plurality of the first connecting parts are provided in intervals around an axis of the limiting groove.

[0012] In some embodiments, the carrier and the injection molding part are both provided in a ring shape, and the thickness of the carrier is greater than the thickness of the injection molding part, and the limiting groove has a slot formed on the end surface of the carrier.

[0013] In some embodiments, the inner wall surface of the limiting groove and the injection molding part jointly define the first cooling flow channel.

[0014] In some embodiments, the carrier is provided with a second cooling flow channel, which is in communication with the first cooling flow channel.

[0015] In some embodiments, the carrier and the injection molding part are connected by means of secondary injection molding.

[0016] In some embodiments, the carrier is made of metal, and / or the injection molding part is made of plastic.

[0017] In a second aspect, the embodiments of the present application provide a rotor assembly, comprising a rotating shaft, a rotor core and at least two dynamic balance plates as described in the first aspect.

[0018] The rotor assembly provided by the embodiments of the present application has the beneficial effects that, since the dynamic balance plate comprises the carrier and the injection molding part connected with each other, at least part of the first cooling flow channel of the dynamic balance plate can be made when the injection molding part is made by means of injection molding, so that the manufacturing process of the first cooling flow channel is relatively simple, and the cost is relatively low, and meanwhile the carrier can ensure that the dynamic balance plate has a certain strength, and the injection molding part can make the dynamic balance plate have a relatively light weight, so that the dynamic balance plate meets the use requirements.

[0019] In a third aspect, an electric machine is provided, which comprises a stator assembly and the rotor assembly as described in the second aspect.

[0020] The electric machine provided by the embodiments of the present application has the beneficial effects that, since the dynamic balance plate of the rotor assembly comprises the load bearing member and the injection molded member connected to each other, at least part of the first cooling flow channel of the dynamic balance plate can be made at the same time when the injection molded member is made by the injection molding method, so that the manufacturing process of the first cooling flow channel is relatively simple and the cost is relatively low, and meanwhile the load bearing member can ensure that the dynamic balance plate has a certain strength, and the injection molded member can make the weight of the dynamic balance plate relatively light, so that the dynamic balance plate meets the use requirements.

[0021] In a fourth aspect, an electric device is provided, which comprises the electric machine as described in the third aspect.

[0022] The electric device provided by the embodiments of the present application has the beneficial effects that, since the dynamic balance plate of the rotor assembly of the electric machine comprises the load bearing member and the injection molded member connected to each other, at least part of the first cooling flow channel of the dynamic balance plate can be made at the same time when the injection molded member is made by the injection molding method, so that the manufacturing process of the first cooling flow channel is relatively simple and the cost is relatively low, and meanwhile the load bearing member can ensure that the dynamic balance plate has a certain strength, and the injection molded member can make the weight of the dynamic balance plate relatively light, so that the dynamic balance plate meets the use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0024] Figure 1 is a structural schematic view of a rotor assembly in one of the embodiments of the present application;

[0025] Figure 2 is a structural schematic view of a rotor assembly in one of the embodiments of the present application; Figure 1 is a sectional view of the rotor assembly along the L-L direction shown in the figure;

[0026] Figure 3 is a structural schematic view of a dynamic balance plate in the rotor assembly shown in the figure; Figure 1 is a structural schematic view of a dynamic balance plate in the rotor assembly shown in the figure;

[0027] Figure 4 is a structural exploded view of the dynamic balance plate shown in the figure; Figure 3 is a structural exploded view of the dynamic balance plate shown in the figure;

[0028] Figure 5 isFigure 3 a top view of the dynamic balance plate shown in FIG. 1;

[0029] Figure 6 is Figure 5 a sectional view of the dynamic balance plate shown in FIG. 1 along the direction of M-M;

[0030] Figure 7 is Figure 6 a partial enlarged view at A in FIG. 2;

[0031] Figure 8 is a structural schematic view of the dynamic balance plate in another embodiment of the present application;

[0032] Figure 9 is Figure 8 a structural exploded view of the dynamic balance plate shown in FIG. 3;

[0033] Figure 10 is Figure 8 a top view of the dynamic balance plate shown in FIG. 3;

[0034] Figure 11 is Figure 10 a sectional view of the dynamic balance plate shown in FIG. 3 along the direction of N-N;

[0035] Figure 12 is Figure 11 a partial enlarged view at B in FIG. 4;

[0036] Figure 13 is Figure 8 a structural schematic view of the injection molding part in the dynamic balance plate shown in FIG. 4.

[0037] The meanings of the marks in the figures are as follows:

[0038] 1000, rotor assembly;

[0039] 100, dynamic balance plate;

[0040] 101, first cooling flow channel;

[0041] 10, bearing;

[0042] 11, limiting groove; 12, second cooling flow channel; 13, first mounting hole; 14, first connecting part;

[0043] 20, injection molding part;

[0044] 21, first part; 22, second part; 23, second mounting hole; 24, second connecting part;

[0045] 200, rotating shaft;

[0046] 300, rotor core. DETAILED DESCRIPTION

[0047] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0048] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0049] In addition, the terms "first", "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0050] In the present application, the reference "one embodiment", "some embodiments" or "embodiments" means that in one or more embodiments of the present application, the specific features, structures or characteristics described in connection with the embodiment are included. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. In addition, in one or more embodiments, specific features, structures or characteristics can be combined in any suitable manner.

[0051] In order to illustrate the technical solutions of the present application, the following will be described in conjunction with specific accompanying drawings and embodiments.

[0052] The motor generally includes a stator assembly and a rotor assembly capable of rotating relative to the stator, the rotor assembly including a rotating shaft and a rotor core fixedly sleeved on the rotating shaft. In order to eliminate the motor vibration and noise caused by the rotation imbalance of the rotor assembly and prolong the service life of the motor, it is often necessary to set dynamic balancing plates at both ends of the rotor core.

[0053] With the demand of motor power density and motor efficiency in application fields such as new energy vehicles being higher and higher, it is required that the motor used in new energy vehicles has higher peak torque, power density and motor efficiency in a smaller volume, and the motor application working conditions are complex and various, the speed and torque range are wide, the highest speed is high, the motor load is large, and the motor generates a lot of heat, which affects the continuous output capacity of the motor and the durability life of the motor. The stator assembly can obtain sufficient cooling due to the structure and arrangement characteristics, but the cooling of the rotor assembly is very difficult. With the increase of the speed, the rotor assembly generates a lot of heat. At present, the motor is controlled by SVPWM (Space Vector Pulse Width Modulation), and a large number of harmonic components are contained in the actual motor current, which aggravates the heating of the rotor assembly (including the magnetic steel). If the rotor assembly is not better cooled, the temperature of the magnetic steel will be increased, the demagnetization risk of the magnetic steel will be increased, and the safety of the magnetic steel will be affected. Therefore, improving the cooling efficiency of the rotor assembly is very important to improve the continuous capacity of the motor and the safety of the motor.

[0054] A conventional cooling method is to set a cooling flow channel for cooling liquid flow in the rotor core and the dynamic balance plate. The dynamic balance plate is an important component of the rotor assembly, and is often an important part of the cooling flow channel of the rotor, and is usually the reversing, inlet and outlet of the cooling flow channel. The dynamic balance plate is a part for ensuring the dynamic balance of the rotor assembly, and is often made of steel, copper or aluminum, which has a large density. It is troublesome and high in cost to process the cooling flow channel on the dynamic balance plate.

[0055] In view of this, the application provides a dynamic balance plate, a rotor assembly, a motor and an electrical equipment. Since the dynamic balance plate comprises a bearing member and an injection member connected with each other, at least part of the first cooling flow channel of the dynamic balance plate can be made at the same time when the injection member is made by injection molding, so that the manufacturing process of the first cooling flow channel is relatively simple and low in cost. Meanwhile, the bearing member can ensure that the dynamic balance plate has a certain strength, and the injection member can make the weight of the dynamic balance plate lighter, so that the dynamic balance plate meets the use requirements.

[0056] Please refer to Figures 1 to 4 , Figure 1 is a structural schematic view of a rotor assembly 1000 in one embodiment of the application, Figure 2 is a sectional view of the rotor assembly 1000 along the L-L direction shown in Figure 1 , Figure 3 is a structural schematic view of a dynamic balance plate 100 in the rotor assembly 1000 shown in Figure 1 , Figure 4 is an exploded view of the dynamic balance plate 100 shown in Figure 3 .

[0057] In a first aspect, the embodiments of the present application provide a dynamic balance plate 100, the dynamic balance plate 100 is provided with a first cooling flow channel 101, the dynamic balance plate 100 comprises a bearing member 10 and an injection member 20 connected with each other, and the injection member 20 defines at least part of the first cooling flow channel 101.

[0058] The dynamic balance plate 100 can be used in a rotor assembly 1000 of an electric machine. The first cooling flow channel 101 is used to accommodate a cooling liquid, the cooling liquid can flow in the first cooling flow channel 101, and the cooling liquid can be cooling oil.

[0059] The bearing member 10 can be provided in a shape of a ring or a disc, etc. The injection member 20 can be provided in a regular shape of a ring or a disc, etc. or other irregular shape. The bearing member 10 and the injection member 20 can be connected in a manner of bonding, clamping, screwing, bolting or buckling, etc. Alternatively, the bearing member 10 and the injection member 20 can also be connected in a manner of secondary injection molding.

[0060] The injection member 20 defines at least part of the first cooling flow channel 101, which can be arranged inside the injection member 20, or the bearing member 10 and the injection member 20 can jointly enclose the first cooling flow channel 101, part of the inner wall surface of the first cooling flow channel 101 is the surface of the injection member 20, and the remaining inner wall surface of the first cooling flow channel 101 is the surface of the bearing member 10.

[0061] As can be seen from the above, the dynamic balance plate 100 provided by the embodiments of the present application comprises the bearing member 10 and the injection member 20 connected with each other. When the injection member 20 is made by injection molding, at least part of the first cooling flow channel 101 of the dynamic balance plate 100 can be made at the same time, so that the manufacturing process of the first cooling flow channel 101 can be relatively simple, and the cost is relatively low. At the same time, the bearing member 10 can also ensure that the dynamic balance plate 100 has a certain strength, and the injection member 20 can make the weight of the dynamic balance plate 100 relatively light, so that the dynamic balance plate 100 can meet the use requirements.

[0062] The dynamic balance plate 100 provided by the embodiments of the present application not only can more conveniently form a complex first cooling flow channel 101, has lower cost, and has simpler manufacturing process, but also has more flexible cooling flow channel scheme design, and can meet the functional requirements of the dynamic balance plate 100 in terms of weight reduction, installation and use, etc. At the same time, the first cooling flow channel 101 in the dynamic balance plate 100 provided by the embodiments of the present application can better cool the rotor assembly 1000, improve the continuous capacity of the electric machine, reduce the cost of the magnetic steel, and improve the safety of the magnetic steel.

[0063] Please continue to refer to Figures 1 to 4In order to increase the connecting strength of the bearing part 10 and the injection part 20, and facilitate the definition of the relative position of the bearing part 10 and the injection part 20, in the embodiment, the bearing part 10 is provided with a limiting groove 11, and at least part of the injection part 20 is accommodated in the limiting groove 11.

[0064] By using the above scheme, the inner wall surface of the limiting groove 11 can be in contact with at least part of the injection part 20, so as to increase the connecting area of the bearing part 10 and the injection part 20, thereby increasing the connecting strength of the bearing part 10 and the injection part 20, and the position of the injection part 20 can be better defined through the limiting groove 11, thereby facilitating the definition of the relative position of the bearing part 10 and the injection part 20.

[0065] It can be understood that all the injection parts 20 can be accommodated in the limiting groove 11, and the shape of the injection part 20 and the shape of the limiting groove 11 are matched, such as the shape of the injection part 20 and the shape of the limiting groove 11 are both set as a cylinder or a ring.

[0066] Please refer to Figure 5 , Figure 6 and Figure 7 , Figure 5 is a top view of the dynamic balance plate 100 shown in Figure 3 , Figure 6 is a sectional view of the dynamic balance plate 100 along the direction M-M shown in Figure 5 , Figure 7 is a local enlarged view of A in Figure 6 .

[0067] In the embodiment, the shape of the bearing part 10 and the shape of the injection part 20 are both set as a ring, and the thickness of the bearing part 10 is greater than the thickness of the injection part 20, and the limiting groove 11 has a slot formed on the end face of the bearing part 10.

[0068] By using the above scheme, the structure of the bearing part 10 and the structure of the injection part 20 can be relatively simple, which is convenient for manufacturing.

[0069] Optionally, the inner wall surface of the limiting groove 11 and the injection part 20 jointly define a first cooling flow channel 101.

[0070] In this way, the structure of the injection part 20 can be relatively simple, and only needs to be simply processed to enclose the first cooling flow channel 101 with the inner wall surface of the limiting groove 11.

[0071] For example, all the injection parts 20 can be accommodated in the limiting groove 11, the injection part 20 includes a first part 21 and a second part 22, the shape of the first part 21 and the shape of the second part 22 are both set as a ring and coaxially arranged, the outer diameter of the first part 21 is greater than the outer diameter of the first part 21, and the part between the first part 21 and the second part 22 is the first cooling flow channel 101.

[0072] Optionally, the bearing 10 is provided with a second cooling flow channel 12, which is in communication with the first cooling flow channel 101.

[0073] In this way, the first cooling flow channel 101 can be in communication with other spaces of the rotor assembly 1000 through the second cooling flow channel 12.

[0074] It should be noted that the second cooling flow channel 12 can be provided in multiple numbers, and the multiple second cooling flow channels 12 are arranged at intervals around the axis of the limiting groove 11. The second cooling flow channel 12 can be provided as a through hole or the like.

[0075] Please refer to Figure 3 and Figure 4 In the embodiment, the bearing 10 and the injection molding part 20 are connected by means of secondary injection molding.

[0076] By adopting the above scheme, the bearing 10 and the injection molding part 20 can be connected more closely, so that the integrity of the dynamic balance plate 100 is better.

[0077] Optionally, the material of the bearing 10 is metal; and / or, the material of the injection molding part 20 is plastic.

[0078] In this way, the bearing 10 and the injection molding part 20 can be easily processed and have low cost.

[0079] The material of the bearing 10 can be steel, copper or aluminum or other metals with high density. The material of the injection molding part 20 can be acrylonitrile-butadiene-styrene copolymer, polycarbonate, nylon, polyformaldehyde or other plastics that can be easily injection molded and are not easy to react with the cooling liquid.

[0080] For example, when manufacturing the dynamic balance plate 100 provided in the above embodiment, the bearing 10 can be manufactured by casting or machining, and then the bearing 10 manufactured by casting or machining is placed in an injection molding mold to perform injection molding of the injection molding part 20.

[0081] The first cooling flow channel 101 of the dynamic balance plate 100 provided in the embodiment can be adjusted according to different cooling requirements and schemes, the injection molding part 20 is combined with the bearing 10 by means of secondary injection molding process, various structure and cooling requirement cooling flow channel design requirements can be realized, and the functionality requirements of weight reduction and installation of the dynamic balance plate 100 are ensured.

[0082] Please refer to Figures 8 to 13 , Figure 8 is a structural schematic view of a dynamic balance plate 100 in another embodiment of the application, Figure 9 is Figure 8 is an exploded view of the dynamic balance plate 100 shown in FIG. 8, Figure 10 isFigure 8 a top view of the dynamic balancing plate 100 shown, Figure 11 Figure 10 a sectional view of the dynamic balancing plate 100 shown along the direction of N-N, Figure 12 Figure 11 a local enlarged view at B, Figure 13 Figure 8 a structural schematic view of the injection molding piece 20 in the dynamic balancing plate 100 shown.

[0083] On the basis of the above-mentioned embodiment, in another embodiment, the carrier 10 is provided with a first connecting part 14, and the injection molding piece 20 is provided with a second connecting part 24, which cooperates with the first connecting part 14.

[0084] By adopting the above-mentioned scheme, the connecting area of the carrier 10 and the injection molding piece 20 can be increased, so as to increase the connecting strength of the carrier 10 and the injection molding piece 20, and it is convenient to define the relative position of the carrier 10 and the injection molding piece 20 by cooperating the second connecting part 24 with the first connecting part 14.

[0085] Optionally, one of the first connecting part 14 and the second connecting part 24 is provided as a recessed part, and the other of the second connecting part 24 and the second connecting part 24 is provided as a protruding part, the protruding part is accommodated in the recessed part, the protruding part can be columnar or blocky, etc., and the recessed part can be a hole or a slot, etc.

[0086] In this way, the structure of the first connecting part 14 and the second connecting part 24 can be relatively simple.

[0087] For example, the first connecting part 14 is provided as a recessed part, and the second connecting part 24 is provided as a protruding part, which is accommodated in the recessed part.

[0088] In this way, it is convenient to process the first connecting part 14 on the carrier 10.

[0089] It can be understood that the first connecting part 14 and the second connecting part 24 can be provided with one or more. When the first connecting part 14 and the second connecting part 24 are both provided with multiple, they can be correspondingly provided one by one.

[0090] For example, the first connecting part 14 and the second connecting part 24 are both provided with multiple. A part of the second connecting part 24 is arranged at the first part 21, and the first connecting part 14 corresponding to this part is arranged at the side wall of the limiting groove 11; another part of the second connecting part 24 is arranged at the second part 22, and the first connecting part 14 corresponding to this part is arranged at the bottom wall of the limiting groove 11.

[0091] Optionally, the multiple first connecting parts 14 and the multiple second connecting parts 24 are correspondingly provided one by one, and the multiple first connecting parts 14 are arranged at intervals around the axis of the limiting groove 11. ​​​

[0092] In this way, the position accuracy of the first connecting portion 14 and the second connecting portion 24 can be controlled when the first connecting portion 14 and the second connecting portion 24 are processed.

[0093] It can be understood that the plurality of second connecting portions 24 are arranged at intervals around the axis of the limiting groove 11.

[0094] Please refer to Figures 1 to 13 In the third aspect, the embodiment of the present application provides a motor, which comprises a stator assembly (not shown in the figure) and the rotor assembly 1000 as described in the second aspect.

[0095] The rotor assembly 1000 provided by the embodiment of the present application can make the manufacturing process of the first cooling flow channel 101 of the dynamic balance plate 100 relatively simple and low in cost, because the dynamic balance plate 100 comprises the bearing member 10 and the injection member 20 connected with each other, and the injection member 20 is manufactured by injection molding. Meanwhile, the bearing member 10 can ensure that the dynamic balance plate 100 has a certain strength, and the injection member 20 can make the dynamic balance plate 100 relatively light in weight, so that the dynamic balance plate 100 meets the use requirements.

[0096] It can be understood that the rotor core 300 and the dynamic balance plate 100 can be sleeved on the shaft 200, the two dynamic balance plates 100 are arranged at two ends of the rotor core 300 respectively, the rotor core 300 and the shaft 200 can be provided with cooling flow channels, the cooling flow channel in the rotor core 300 is in communication with the cooling flow channel in the shaft 200, and the second cooling flow channel 12 is in communication with the cooling flow channel in the rotor core 300. The rotor core 300 can comprise a plurality of laminations and a plurality of magnetic steels.

[0097] For example, the bearing member 10 is provided with a first mounting hole 13, the injection member 20 is provided with a second mounting hole 23, and the shaft 200 is arranged through the first mounting hole 13 and the second mounting hole 23.

[0098] Please refer to Figures 1 to 13 In the third aspect, the embodiment of the present application provides a motor, which comprises a stator assembly (not shown in the figure) and the rotor assembly 1000 as described in the second aspect.

[0099] The motor provided by the embodiments of the present application, since the dynamic balance plate 100 of the rotor assembly 1000 comprises the bearing member 10 and the injection member 20 connected with each other, at least part of the first cooling flow channel 101 of the dynamic balance plate 100 can be manufactured together when the injection member 20 is manufactured by injection molding, so that the manufacturing process of the first cooling flow channel 101 is relatively simple, and the cost is relatively low, meanwhile, the bearing member 10 can ensure that the dynamic balance plate 100 has a certain strength, and the injection member 20 can make the weight of the dynamic balance plate 100 relatively light, so that the dynamic balance plate 100 meets the use requirements.

[0100] It can be understood that the rotor assembly 1000 can rotate relative to the stator assembly. The motor can further comprise a housing (not shown in the figure), the stator assembly is fixedly connected with the housing, and the rotor assembly 1000 can be rotatably connected with the housing through a bearing or the like.

[0101] Please refer to Figures 1 to 13 In the fourth aspect, the embodiments of the present application provide a power utilization device, the power utilization device comprising the motor of the third aspect.

[0102] The power utilization device provided by the embodiments of the present application, since the dynamic balance plate 100 of the rotor assembly 1000 in the motor comprises the bearing member 10 and the injection member 20 connected with each other, at least part of the first cooling flow channel 101 of the dynamic balance plate 100 can be manufactured together when the injection member 20 is manufactured by injection molding, so that the manufacturing process of the first cooling flow channel 101 is relatively simple, and the cost is relatively low, meanwhile, the bearing member 10 can ensure that the dynamic balance plate 100 has a certain strength, and the injection member 20 can make the weight of the dynamic balance plate 100 relatively light, so that the dynamic balance plate 100 meets the use requirements.

[0103] It can be understood that the power utilization device provided by the embodiments of the present application can be a vehicle or the like, when the power utilization device provided by the embodiments of the present application is a vehicle, the vehicle can further comprise a chassis, a battery, a vehicle body, wheels and the like.

[0104] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the foregoing embodiments of the present application are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A dynamic balancing plate, characterized by, The dynamic balance plate is provided with a first cooling flow channel, and comprises a carrier and an injection molding part connected to each other, and the injection molding part defines at least part of the first cooling flow channel.

2. The dynamic balancing plate according to claim 1, characterized in that, The carrier is provided with a limiting groove, and at least part of the injection molding part is accommodated in the limiting groove.

3. The dynamic balancing plate of claim 2, wherein, The carrier is provided with a first connecting part, and the injection molding part is provided with a second connecting part matched with the first connecting part.

4. The dynamic balancing plate of claim 3, wherein, One of the first connecting part and the second connecting part is provided as a recess, and the other is provided as a protrusion accommodated in the recess.

5. The dynamic balancing board of claim 3, wherein, A plurality of the first connecting parts and a plurality of the second connecting parts are provided in one-to-one correspondence, and the plurality of the first connecting parts are arranged at intervals around an axis of the limiting groove.

6. The dynamic balancing board of claim 2, wherein, The carrier and the injection molding part are both provided in a ring shape, and the thickness of the carrier is greater than that of the injection molding part, and the limiting groove has a slot formed on an end surface of the carrier.

7. The dynamic balancing board of claim 2, wherein, An inner wall surface of the limiting groove and the injection molding part jointly define the first cooling flow channel.

8. The dynamic balancing board of any one of claims 1 to 7, wherein, The carrier is provided with a second cooling flow channel, and the second cooling flow channel is in communication with the first cooling flow channel.

9. The dynamic balancing board of any one of claims 1 to 7, wherein, The carrier and the injection molding part are connected by means of secondary injection molding.

10. The dynamic balancing board of any one of claims 1 to 7, wherein, The carrier is made of metal, and / or the injection molding part is made of plastic.

11. A rotor assembly characterized by, The motor comprises a rotor assembly and at least two dynamic balance plates as claimed in any one of claims 1 to 10.

12. An electric machine characterized by The motor comprises a stator assembly and a rotor assembly as claimed in claim 11.

13. An electrical device, characterized by The electrical equipment comprises a motor as claimed in claim 12. The motor comprises a rotor assembly and at least two dynamic balance plates as claimed in any one of claims 1 to 10. The motor comprises a stator assembly and a rotor assembly as claimed in claim 11. The electrical equipment comprises a motor as claimed in claim 12.

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