CN112436640A - Motor heat radiation structure and motor - Google Patents

Abstract

The application discloses motor heat radiation structure and motor. The motor heat radiation structure comprises an iron core, a heat conducting sheet and a heat conducting shaft. The iron core is provided with a coil framework and heat conducting holes, the heat conducting holes are coaxial with the iron core, the coil framework is annularly arranged on the iron core and located on the periphery of the heat conducting holes, and the coil framework is used for installing a coil. The heat conducting fins are arranged on the surface of the iron core and used for conducting local heat generated by the iron core during working to the whole iron core. The heat conduction shaft is in interference fit with the heat conduction hole, and the end part of the heat conduction shaft penetrates through the iron core so as to dissipate the heat of the iron core. The technical scheme that this application provided can solve among the prior art motor size great, and do not have the way to make the problem of driving motor integration.

Description

Motor heat radiation structure and motor

Technical Field

The application relates to the technical field of motors, in particular to a motor heat dissipation structure and a motor.

Background

The existing brushless torque motor generally adopts the separated installation of a drive and a motor because the heat cannot be dissipated, and the integration of the drive motor cannot be realized, and meanwhile, the size of the motor is relatively large because a heat dissipation space needs to be reserved.

Disclosure of Invention

The application provides a motor heat radiation structure and motor, it can solve among the prior art motor size great, and does not have the way to make the problem of driving motor integration.

In a first aspect, an embodiment of the present invention provides a heat dissipation structure for a motor, including:

the coil framework is arranged on the iron core in a surrounding manner and positioned at the periphery of the heat conducting hole, and the coil framework is used for installing a coil;

the heat conducting fins are arranged on the surface of the iron core and used for conducting local heat generated by the iron core during working to the whole iron core;

the heat conduction shaft is in interference fit with the heat conduction holes, and the end part of the heat conduction shaft penetrates through the iron core so as to dissipate the heat of the iron core.

In the implementation process, when the motor heat dissipation structure is applied to a motor, and when the motor heat dissipation structure works, the iron core generates eddy currents under an alternating magnetic field of the coil, so that the iron core generates local heat, the heat generation part is mainly near the coil framework, and heat generated at the position can be quickly conducted and diffused to the whole iron core through the heat conducting fins, so that the heat dissipation area and the heat dissipation efficiency are improved; meanwhile, as the heat can be diffused to the whole iron core, the heat can be efficiently dissipated to the outside in the heat conduction hole through the conduction of the heat conduction shaft, so that compared with the prior art, an additional heat dissipation space does not need to be designed, and the size of the motor can be reduced; meanwhile, the motor heat dissipation structure has a good heat dissipation effect, so that the motor with the motor heat dissipation structure is applied, the performance of the motor is not limited to ensure that the motor is not burnt out, the performance of the motor can be improved compared with the prior art, meanwhile, the safety of a driving plate in the motor can also be ensured, and the integrated requirement of the driving motor can be met.

In an alternative embodiment, the heat-conducting sheet includes a diffusion region and a coil mounting region corresponding to the bobbin;

the coil mounting region is aligned with the coil framework to commonly mount the coil;

the diffusion area is attached to the area between the coil skeleton and the heat conduction hole on the surface of the iron core.

The in-process of above-mentioned realization, conducting strip and iron core common installation coil, when the iron core leads to local heating because the vortex, the heat can be better by coil installation region and diffusion zone diffusion to whole iron core, does benefit to the heat dissipation of iron core.

In an alternative embodiment, the heat-conducting plate extends to the heat-conducting hole, and the heat-conducting shaft is in interference fit with the heat-conducting plate.

The in-process of above-mentioned realization, conducting strip and heat conduction axle interference fit for the conducting strip directly conducts the heat to the heat conduction axis body, in order to cause the external world, does benefit to the radiating effect who improves motor heat radiation structure, simultaneously, also further reduces the risk that the iron core is burnt out by the heat.

In an alternative embodiment, the number of the heat-conducting fins is two, and the two heat-conducting fins are respectively arranged on two opposite surfaces of the iron core.

In the implementation process, the two heat-conducting fins are adopted to improve the efficiency of the heat-conducting fins for diffusing heat to the whole iron core and avoid the situation that the iron core is burnt out due to slow heat conduction; meanwhile, the efficiency of heat diffusion is improved, and the performance of the motor can be further improved.

In an alternative embodiment, the heat conducting shaft includes a shaft body and a heat conducting body embedded on a surface of the shaft body, and the heat conducting body extends along an axial direction of the shaft body.

In the process of the realization, the balance among the manufacturing cost, the heat dissipation effect and the structural stability is considered, the assembly mode of the shaft body and the heat conductor is adopted, and the heat dissipation effect of the heat conduction shaft and the heat conduction shaft which is stably connected with the iron core is ensured under the condition of using fewer heat conduction materials with good heat conduction effect.

In an alternative embodiment, the number of the heat conductors is three, and three heat conductors are uniformly arranged on the surface of the shaft body at intervals.

In the process of the realization, the three heat conductors can conduct heat with the iron core respectively, so that the heat of the iron core is led out quickly and efficiently, and the heat dissipation effect of the motor heat dissipation structure is improved.

In an alternative embodiment, the shaft body comprises a steel shaft and the heat conductor comprises a copper strip or tube.

In the implementation process, the heat conductivity coefficient of copper is 401W/m.K, so that the heat of the iron core can be efficiently led out to the outside, and the iron core is prevented from being burnt out.

In an alternative embodiment, the end of the heat conducting shaft is provided with a copper ring, the copper ring is in interference fit with the steel shaft and is in contact with the heat conductor, and the copper ring is used for externally connecting a heat dissipation source.

In the above implementation, a copper ring is disposed at the end of the heat conducting shaft to facilitate the heat conductor to conduct heat to the copper ring, and finally to the external heat dissipation source, for example, as a heat sink.

In an alternative embodiment, the heat conducting sheet is a copper sheet, and the copper sheet is adhered to the surface of the iron core through an insulating material.

In the implementation process, the heat conductivity coefficient of copper is 401W/m.K, so that local heat generated by the iron core can be quickly diffused to the whole iron core when the iron core works efficiently, and the iron core is prevented from being burnt due to overhigh local heat.

In a second aspect, an embodiment of the present invention provides an electric machine, including:

an end cap;

a magnet fixing ring;

a magnet;

a coil; and

the motor heat dissipation structure of any one of the preceding embodiments;

the coil is arranged on a coil framework of the iron core;

the iron core is positioned in the inner ring of the magnet fixing ring, and the magnets are arranged on the inner wall of the magnet fixing ring to correspond to the circumferential surface of the iron core;

the two end covers are positioned on two opposite sides of the iron core and are used for fixing the magnet fixing ring, and the end part of the heat conduction shaft penetrates through the end covers.

In the process of realizing, the motor has a good heat dissipation effect under the action of the motor heat dissipation structure, and the iron core is prevented from being burned out when the motor works.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a perspective view of a heat dissipation structure of a motor in the present embodiment;

fig. 2 is a sectional view of the heat dissipation structure of the motor in the present embodiment;

FIG. 3 is a schematic view of a heat generating portion of the core in the present embodiment;

fig. 4 is an assembly view of the iron core and the heat conductive sheet in the present embodiment;

FIG. 5 is a perspective view of the heat conductive shaft of the present embodiment;

fig. 6 is an assembly view of the motor provided in the present embodiment;

fig. 7 is a sectional view of the motor provided in this embodiment.

Icon: 10-an iron core; 11-a thermally conductive sheet; 12-a thermally conductive shaft; 13-a coil former; 14-heat conduction holes; 15-a diffusion region; 16-coil mounting area; 17-a shaft body; 18-a heat conductor; 19-a copper ring; 20-end cap; 21-a magnet fixing ring; 22-a magnet; 23-coil.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solution in the present application will be described below with reference to the accompanying drawings.

The embodiment provides a motor heat radiation structure, which can solve the problems that the size of a motor is large and a driving motor cannot be integrated in the prior art.

Referring to fig. 1 and fig. 2, fig. 1 is a perspective view of a heat dissipation structure of a motor in the present embodiment, and fig. 2 is a sectional view of the heat dissipation structure of the motor in the present embodiment.

The motor heat dissipation structure includes an iron core 10, a heat conduction sheet 11, and a heat conduction shaft 12. The iron core 10 is formed with a coil skeleton 13 and a heat conduction hole 14, the coil skeleton 13 is arranged around the iron core 10 and located at the periphery of the heat conduction hole 14, and the coil skeleton 13 is used for installing the coil 23. The heat-conducting fin 11 is disposed on the surface of the core 10, and is used for conducting local heat generated by the core 10 during operation to the whole core 10. The heat conducting shaft 12 is interference-fitted to the heat conducting hole 14, and an end of the heat conducting shaft 12 penetrates the core 10 to dissipate heat of the core 10.

In the implementation process, when the motor heat dissipation structure is applied to a motor, and during operation, the iron core 10 generates eddy current under the alternating magnetic field of the coil 23, and further causes the iron core 10 to generate heat locally, and the heat generation part is mainly near the coil skeleton 13. Referring to fig. 3, fig. 3 is a schematic diagram of a heat generating portion of the core 10 in the present embodiment, and the heat generating position of the core 10 is indicated by a frame plus an arrow mark in fig. 3. The heat generated at this position is quickly conducted and diffused to the entire core 10 through the heat conductive sheet 11, thereby improving the heat dissipation area and the heat dissipation efficiency. Meanwhile, since the heat is diffused to the whole iron core 10, the heat can be efficiently dissipated to the outside through the conduction of the heat conduction shaft 12 in the heat conduction hole 14, so that an additional heat dissipation space is not required to be designed compared with the prior art, and the size of the motor can be reduced; meanwhile, the motor heat dissipation structure has a good heat dissipation effect, so that the motor of the motor heat dissipation structure is applied, the performance of the motor is not limited to ensure that the motor is not burnt out, and further the performance of the motor can be improved compared with the prior art.

It should be noted that, in the present disclosure, the heat conduction hole 14 is coaxial with the core 10, that is, the heat conduction hole 14 is located at the center of the core 10, and when the heat conduction sheet 11 spreads the heat to the whole core 10, the heat can be uniformly and simultaneously conducted to the heat conduction hole 14, and finally led to the outside by the heat conduction shaft 12.

Referring to fig. 4, fig. 4 is an assembly view of the iron core 10 and the heat conducting plate 11 in the present embodiment.

In the present disclosure, the heat conductive sheet 11 includes the diffusion region 15 and the coil mounting region 16 corresponding to the coil bobbin 13.

The coil mounting region 16 is aligned with the bobbin 13 to collectively mount the coil 23.

The diffusion region 15 is bonded to a region between the bobbin 13 and the heat conduction hole 14 on the surface of the core 10.

In the implementation process, the heat conducting sheet 11 and the iron core 10 together mount the coil 23, and when the iron core 10 generates heat locally due to eddy current, the heat can be better diffused to the whole iron core 10 from the coil mounting region 16 and the diffusion region 15, which is beneficial to heat dissipation of the iron core 10.

It should be noted that, in other embodiments, the surface of the core 10 may be concave, and the heat conducting strip 11 may only include the diffusion region 15, and the diffusion region 15 is embedded in the concave position on the surface of the core 10, and contacts with the bobbin 13 of the core 10 to realize heat conduction.

In the present disclosure, the heat-conducting plate 11 extends to the heat-conducting hole 14, and the heat-conducting shaft 12 is in interference fit with the heat-conducting plate 11.

Above-mentioned in-process of realizing, conducting strip 11 and the 12 interference fit of heat conduction axle for the conducting strip 11 directly conducts the heat to the 12 bodies of heat conduction axle, in order to cause the external world, does benefit to the radiating effect who improves motor heat radiation structure, simultaneously, also further reduces the risk that iron core 10 is burnt out by the heat.

It should be noted that, in other embodiments, it is not limited whether the heat-conducting strip 11 extends to the heat-conducting hole 14, and a heat-conducting cylinder may be disposed in the heat-conducting hole 14, and the heat-conducting cylinder is in interference fit with the heat-conducting shaft 12, so as to improve the efficiency of conducting the heat of the iron core 10 to the heat-conducting shaft 12.

In the present disclosure, the number of the heat-conducting fins 11 is two, and the two heat-conducting fins 11 are respectively disposed on two opposite surfaces of the iron core 10.

In the implementation process, the two heat-conducting fins 11 are adopted to improve the efficiency of the heat-conducting fins 11 for diffusing heat to the whole iron core 10 and avoid the situation that the iron core 10 is burnt out due to slow heat conduction; meanwhile, the efficiency of heat diffusion is improved, and the performance of the motor can be further improved.

Referring to fig. 5, fig. 5 is a perspective view of the heat conducting shaft 12 in the present embodiment.

The thermally conductive shaft 12 includes a shaft body 17 and a thermal conductor 18 embedded in a surface of the shaft body 17, and the thermal conductor 18 extends in an axial direction of the shaft body 17.

In the implementation process, the balance among the manufacturing cost, the heat dissipation effect and the structural stability is considered, the assembly mode of the shaft body 17 and the heat conductor 18 is adopted, and the heat conduction shaft 12 is stably connected with the iron core 10 and the heat dissipation effect of the heat conduction shaft 12 is ensured under the condition that less heat conduction materials with good heat conduction effects are used.

In the present disclosure, the number of the heat conductors 18 is three, and three heat conductors 18 are uniformly arranged on the surface of the shaft body 17 at intervals.

In the implementation process, the three heat conductors 18 can conduct heat with the iron core 10 respectively, so that the heat of the iron core 10 can be led out quickly and efficiently, and the heat dissipation effect of the motor heat dissipation structure is improved.

Illustratively, the shaft body 17 comprises a steel shaft and the heat conductor 18 comprises a copper strip or tube. The heat conductivity coefficient of copper is 401W/m.K, and the copper is used as a heat conducting medium, so that the heat of the iron core 10 can be efficiently led out to the outside, and the iron core 10 is prevented from being burnt out; meanwhile, the shaft body 17 is made of steel, so that the cost is low, and the manufacturing cost of the whole motor structure is favorably controlled.

It should be noted that in other embodiments, the entire heat conductive shaft 12 may be provided as a copper shaft.

It should be noted that, for an actual finished product of the motor heat dissipation structure, the heat conducting fins 11 described above can also be made of copper to obtain a better heat conducting effect, so that when the iron core 10 works, the local heat generated by the iron core 10 can be quickly diffused to the whole iron core 10, the situation that the iron core 10 is burned out due to too high local heat is avoided, and the heat dissipation effect of the motor heat dissipation structure is facilitated.

The heat conducting plate 11 is bonded to the core 10 through an insulating material.

Referring back to fig. 1 and 5, the end of the heat conducting shaft 12 is configured with a copper ring 19, the copper ring 19 is in interference fit with the steel shaft and contacts with the heat conductor 18, and the copper ring 19 is used for externally connecting a heat dissipation source.

In the above implementation, the copper ring 19 is disposed at the end of the heat conducting shaft 12, which facilitates the heat conductor 18 to conduct heat to the copper ring 19, and finally to the external heat dissipation source, such as a heat sink. It should be noted that, when the heat dissipation structure of the motor is applied to the motor and the motor is loaded on a certain device, the copper ring 19 may be fixed on the device or contact with a heat sink on the device, so as to quickly conduct heat generated by the motor during operation to the device or the heat sink of the device, and finally discharge the heat to the outside, thereby ensuring normal operation of the motor.

Referring to fig. 6 and 7, fig. 6 is an assembly view of the motor provided in the present embodiment, and fig. 7 is a sectional view of the motor provided in the present embodiment.

It should be noted that the present disclosure also provides an electric motor, which includes an end cover 20, a magnet fixing ring 21, a magnet 22, a coil 23, and the above-described heat dissipation structure of the electric motor.

The coil 23 is mounted on the bobbin 13 of the core 10. The core 10 is located in an inner ring of the magnet fixing ring 21, and a plurality of magnets are provided on an inner wall of the magnet fixing ring 21 to correspond to a circumferential surface of the core 10. Two end caps 20 are disposed at opposite sides of the core 10, and a magnet fixing ring 21 is fixed, and an end of the heat conductive shaft 12 passes through the end caps 20.

In the implementation process, the motor has a good heat dissipation effect under the action of the motor heat dissipation structure, and the iron core 10 is prevented from being burned out when the motor works; meanwhile, the motor has a good heat dissipation effect, so that a drive plate can be arranged in the motor, the integration of the drive motor is realized, and the performance of the motor is improved.

It should be noted that a gap may be formed between the two end caps 20 and the iron core 10, so that the heat dissipated from the heat conducting fins 11 to the whole iron core 10 is in contact with the air in the gap in a large area, which is beneficial to heat dissipation of the iron core 10.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A motor heat radiation structure, its characterized in that includes:

the coil framework is arranged on the iron core in a surrounding mode and positioned at the periphery of the heat conducting hole, and the coil framework is used for installing a coil;

the heat conducting fins are arranged on the surface of the iron core and used for conducting local heat generated by the iron core during working to the whole iron core; and

and the heat conduction shaft is in interference fit with the heat conduction hole, and the end part of the heat conduction shaft penetrates through the iron core so as to dissipate the heat of the iron core.

2. The motor heat dissipation structure according to claim 1,

the heat conducting fin comprises a diffusion area and a coil mounting area corresponding to the coil framework;

the coil mounting region is aligned with the bobbin to collectively mount the coil;

the diffusion area is attached to an area between the coil framework and the heat conduction hole on the surface of the iron core.

3. The motor heat dissipation structure according to claim 1,

the heat conducting fins extend to the heat conducting holes, and the heat conducting shafts are in interference fit with the heat conducting fins.

4. The motor heat dissipation structure according to claim 3,

the number of the heat-conducting fins is two, and the two heat-conducting fins are respectively arranged on two opposite surfaces of the iron core.

5. The motor heat dissipation structure according to claim 1,

the heat conduction shaft comprises a shaft body and a heat conductor embedded on the surface of the shaft body, and the heat conductor extends along the axial direction of the shaft body.

6. The motor heat dissipation structure according to claim 5,

the number of the heat conductors is three, and the three heat conductors are uniformly arranged on the surface of the shaft body at intervals.

7. The motor heat dissipation structure according to claim 5,

the axis body includes the steel axle, the heat conductor includes copper bar or copper pipe.

8. The motor heat dissipation structure according to claim 7,

the end of the heat conduction shaft is provided with a copper ring, the copper ring is in interference fit with the steel shaft and is in contact with the heat conductor, and the copper ring is used for being externally connected with a heat dissipation source.

9. The motor heat dissipation structure according to any one of claims 1 to 8,

the heat conducting strip is a copper sheet, and the copper sheet is bonded to the surface of the iron core through an insulating material.

10. An electric machine, comprising:

an end cap;

a magnet fixing ring;

a magnet;

a coil; and

the motor heat dissipation structure of any one of claims 1 to 9;

the coil is arranged on a coil framework of the iron core;

the iron core is positioned in the inner ring of the magnet fixing ring, and the magnets are arranged on the inner wall of the magnet fixing ring to correspond to the peripheral surface of the iron core;

the two end covers are arranged on two opposite sides of the iron core and fix the magnet fixing ring, and the end part of the heat conduction shaft penetrates through the end covers.

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