CN218678731U

CN218678731U - Integrated heat dissipation motor

Info

Publication number: CN218678731U
Application number: CN202223113752.8U
Authority: CN
Inventors: 陈志英; 丁迎; 周海军
Original assignee: Changzhou Xiangming Intelligent Power Co ltd
Current assignee: Changzhou Xiangming Intelligent Power Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-03-21
Anticipated expiration: 2032-11-22

Abstract

The utility model relates to an integrated heat dissipation motor, which is provided with an outer rotor assembly, a stator assembly, a circuit board assembly and an end cover; the stator body comprises a cover shell, and the cover shell is fixedly connected with the end cover to form a cavity for containing the circuit board assembly; the stator winding is fixedly arranged on the outer side of the end face plate of the cover shell; a first connecting block extending towards the interior of the end cover is arranged on the inner side wall of the cover shell; the first connecting block is detachably and fixedly provided with a first heat dissipation block which is attached to a first heat generation area on the circuit board assembly; a second heat dissipation block which is used for being attached to a second heating area on the circuit board assembly is detachably and fixedly arranged in the end cover; an insulating base plate is fixedly arranged on the inner side wall of the end plate of the cover shell; the circuit board assembly is fixedly connected to the stator body and is positioned between the insulating base plate and the first heat dissipation block. The stator body in the utility model directly participates in the heat dissipation of the circuit board assembly; meanwhile, the designed heat dissipation structure can replace adapting pieces according to different models of products, and the universality is stronger.

Description

Integrated heat dissipation motor

Technical Field

The utility model relates to the field of electric machines, in particular to integrated form heat dissipation motor.

Background

Compared with the traditional motor, the external rotor motor has the advantages that the rotor is arranged outside, the stator is arranged inside, the rotary inertia is large, the power density is high, the load parts (such as fan blades and the like) can be directly connected with the rotor body, and the mounting size requirement of the whole motor with small volume and certain power is met. When the size of the motor is the same, the outer rotor motor can generate larger torque at low speed, and the problem that the magnetic steel of the traditional motor falls off when the motor runs at high speed is avoided. Therefore, the external rotor motor can meet the use requirement of high rotating speed more easily.

The motor is at the operation in-process, in order to guarantee its steady operation, its heat dispersion is the key of guaranteeing its long-time steady operation, because when the inside high temperature of motor, the overheat protection of electronic components is started easily to cause the phenomenon of overheated shut down.

The heat generated by the motor typically comes from the electronics and stator windings. The heat dissipation of electronic components is usually conducted through the stator body and the end cover, and the specific heat dissipation mode is as follows: the electronic components work and generate heat, the heat is concentrated in the containing cavity for installing the circuit board assembly, at the moment, the stator body and the end cover simultaneously absorb the heat in the containing cavity and radiate the heat outwards, wherein the stator body only absorbs the heat naturally, and the heat absorption effect is general. Meanwhile, in order to ensure the normal operation and the service life of the chip on the circuit board assembly, a heat dissipation block attached to the chip is often arranged on the end cover. The heatslug is often integral with the end cap, which also creates a large number of end cap components that differ only in the size of the heatslug.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an integrated heat dissipation motor, which integrates a stator body and a control cover shell and leads the stator body to directly participate in the heat dissipation of a circuit board assembly; meanwhile, the designed heat dissipation structure can replace adapting pieces according to different models of products, and the universality is stronger.

Realize the utility model discloses the technical scheme of purpose is: the utility model is provided with an outer rotor assembly, a stator assembly, a circuit board assembly and an end cover; the stator assembly comprises a stator body fixedly provided with a stator winding; the outer rotor assembly comprises a rotor body fixedly provided with magnetic steel; the magnetic steel and the stator winding are coaxially arranged, and the magnetic steel is positioned outside the stator winding; the rotor body is rotationally connected to the stator body; the stator body comprises a cover shell, and the cover shell is fixedly connected with an end cover to form a cavity for containing the circuit board assembly; the stator winding is fixedly arranged on the outer side of the end face plate of the cover shell; a first connecting block extending towards the interior of the end cover is arranged on the inner side wall of the cover shell; a first heat dissipation block which is used for being attached to a first heat generation area on the circuit board assembly is detachably and fixedly mounted on the first connecting block; a second heat dissipation block which is used for being attached to a second heating area on the circuit board assembly is detachably and fixedly arranged in the end cover; an insulating base plate is fixedly arranged on the inner side wall of the end plate of the cover shell; the circuit board assembly is fixedly connected to the stator body and is located between the insulating base plate and the first heat dissipation block. The first heat-generating region is generally a high heat region where electronic components are concentrated, and the second heat-generating region is generally a chip position on the circuit board assembly.

Further, the second heat dissipation block comprises a connecting body, an extension body and a fitting body which are sequentially connected into a whole; the connector is detachably and fixedly arranged on the bottom surface of the end cover; the jointing body is jointed with the second heating area on the circuit board assembly. When the laminating body is laminated with the first heating area, the heat conducting glue is coated on the laminating body and is used for filling the gap.

Further, a hollow shaft body integrally formed with the cover case is provided at the center of the outer side of the end plate; the stator winding is fixedly connected to the hollow shaft body around the hollow shaft body; the outer rotor assembly comprises a rotating shaft, a shaft sleeve and a rotor body fixedly provided with magnetic steel; the rotating shaft is rotatably arranged in the hollow shaft body through a bearing; one end of the rotating shaft extending out of the hollow shaft body is fixedly connected with the rotor body through a shaft sleeve; the outer side of the end panel is provided with a rotary groove which is coaxial with the hollow shaft body; the open end of the rotor body is inserted into the spiral groove and can rotate in the spiral groove along with the rotation of the rotor body.

Furthermore, the outer edge of the rotary groove is provided with a raised water retaining strip; a plurality of water drainage grooves are distributed on the water bar along the circumference of the axis of the rotary groove; the water bar is broken by the water drainage groove and extends from the water bar to the bottom of the rotary groove in an inclined mode.

Furthermore, a waterproof snap ring is arranged on the end face of the cover shell matched with the end cover; a waterproof ring groove is arranged on the end face of the end cover matched with the cover shell; when the cover shell is fixedly connected with the end cover, the waterproof snap ring is clamped into the waterproof ring groove.

Further, the outer side edge of the spiral groove is lower than the inner side edge of the spiral groove.

Furthermore, the first radiating block and the second radiating block are fixedly connected with the first connecting block and the end cover through connecting screws respectively.

The utility model discloses has positive effect:

(1) The stator body and the end cover are matched to form a containing cavity for installing the circuit board assembly, namely, the function of the stator body is integrated on the traditional control housing; meanwhile, the stator body directly absorbs heat through the first heat dissipation block on the first connecting block, and the problem that the existing stator body only can indirectly absorb heat is solved.

(2) Based on the design of the second radiating block in this application, only need design the extension body of different length, can design the second radiating block of different models, and the detachable fixed mounting who combines the second radiating block simultaneously again lets its suitability higher. Meanwhile, the first radiating block is also detachably fixedly installed, and the adaptability can be further improved.

(3) The utility model discloses a cooperation of spiral groove and rotor block can effectively improve the inside waterproof nature of motor.

(4) The utility model discloses under the effect in sluicing groove, along with the rotation of motor, flow in the water of spiraling inslot, it is outside to be extruded the motor more easily, has improved the waterproof performance of motor in other words.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic structural diagram of a stator body according to the present invention;

FIG. 5 is a schematic view of the mounting of the middle cover and the second heat sink of the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 1;

FIG. 7 is an enlarged view at B in FIG. 3;

fig. 8 is an enlarged view at C in fig. 3.

Detailed Description

Referring to fig. 1 to 8, the present invention has an outer rotor assembly 1, a stator assembly 2, a circuit board assembly 3 and an end cover 4; the stator assembly 2 comprises a stator body 22 fixedly provided with a stator winding 21; the stator body 22 comprises a cover shell 221, and the cover shell 221 and the end cover 4 are fixedly connected to form a cavity 5 for accommodating the circuit board assembly 3; a hollow shaft body 222 integrally formed with the cover shell 221 is provided at the center of the outer side of the end plate 221-1 of the cover shell 221; the stator winding 21 is fixedly connected to the hollow shaft body 222 around the hollow shaft body 222;

the outer rotor assembly 1 comprises a rotating shaft 11, a shaft sleeve 12 and a rotor body 13 fixedly provided with magnetic steel; the magnetic steel and the stator winding 21 are coaxially arranged, and the magnetic steel is positioned outside the stator winding 21; the rotating shaft 11 is rotatably arranged in the hollow shaft body 222 through a bearing 6; one end of the rotating shaft 11 extending out of the hollow shaft body 222 is fixedly connected with the rotor body 13 through a shaft sleeve 12; the outer side of the end panel 221-1 is provided with a spiral groove 223 which is coaxial with the hollow shaft body 222; the open end of the rotor body 13 is inserted into the spiral groove 223 and can rotate in the spiral groove 223 with the rotation of the rotor body 13.

A first connecting block 224 extending towards the inside of the end cover 4 is arranged on the inner side wall of the cover shell 221; the first connecting block 224 is fixedly provided with a first heat dissipation block 7 which is attached to a first heat dissipation area on the circuit board assembly 3 through screws; a second heat dissipation block 8 which is used for being attached to a second heating area on the circuit board assembly 3 is fixedly arranged in the end cover 4 through screws; an insulating backing plate 9 is fixedly arranged on the inner side wall of the end panel 221-1 of the cover shell 221; the inner side wall of the end panel 221-1 of the cover shell 221 is provided with a connecting threaded hole penetrating through the insulating pad 9; the circuit board assembly 3 is fixedly connected with the connecting threaded hole through a bolt, namely the circuit board assembly 3 is fixedly connected on the stator body 22 and is positioned between the insulating pad 9 and the first heat dissipation block 7. The first heat-generating region is generally a high heat-generating region where electronic components are concentrated, and the second heat-generating region is generally a chip position on the circuit board assembly 3.

Stator body 22 cooperates with end cap 4 to form a cavity for mounting circuit board assembly 3, i.e., equivalent to integrating stator body 22 with a conventional control housing. Meanwhile, the stator body 22 directly absorbs heat through the first heat dissipation block 7 on the first connection block 224, so that the problem that the existing stator body 22 only indirectly absorbs heat is solved.

The second heat dissipation block 8 comprises a connecting body 81, an extending body 82 and a fitting body 83 which are sequentially connected into a whole; the connecting body 81 is fixedly arranged on the bottom surface of the end cover 4 through screws; the attaching body 83 is attached to the second heating area on the circuit board assembly 3. When the fitting body 83 is fitted to the first heat-generating area, the heat-conducting glue is coated to fill the gap.

The outer edge of the spiral groove 223 is lower than the inner edge of the spiral groove 223. The outer edge of the rotary groove 223 is provided with a raised water bar 225; a plurality of water drainage grooves 226 are distributed on the water bar 225 along the circumference of the rotary groove axis; the drain groove 226 breaks the water bar 225 and extends obliquely from the water bar 225 toward the bottom of the spiral groove 223. Under the action of the drainage groove 226, the water flowing into the spiral groove 223 is more easily squeezed out of the motor along with the rotation of the motor, which is equivalent to improving the waterproof performance of the motor.

A waterproof snap ring 227 is arranged on the end face of the cover shell 221 matched with the end cover 4; a waterproof ring groove 41 is arranged on the end face of the end cover 4 matched with the cover shell 221; when the cover shell 221 is fixedly connected with the end cover 4, the waterproof snap ring 227 is clamped in the waterproof ring groove 41.

On the external rotor motor of different models, because the distribution of electronic components on circuit board assembly 3 is different, only need install the first radiating block 7 and the second radiating block 8 of different models can, reduce the model quantity of end cover 4 and stator body 22, reduction in production cost and storage cost.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An integrated heat dissipation motor is provided with an outer rotor assembly, a stator assembly, a circuit board assembly and an end cover; the stator assembly comprises a stator body fixedly provided with a stator winding; the outer rotor assembly comprises a rotor body fixedly provided with magnetic steel; the magnetic steel and the stator winding are coaxially arranged, and the magnetic steel is positioned outside the stator winding; the rotor body is rotationally connected to the stator body; the method is characterized in that: the stator body comprises a cover shell, and the cover shell is fixedly connected with an end cover to form a cavity for containing the circuit board assembly; the stator winding is fixedly arranged on the outer side of the end face plate of the cover shell; a first connecting block extending towards the interior of the end cover is arranged on the inner side wall of the cover shell; a first heat dissipation block which is used for being attached to a first heat generation area on the circuit board assembly is detachably and fixedly mounted on the first connecting block; a second heat dissipation block which is used for being attached to a second heating area on the circuit board assembly is detachably and fixedly arranged in the end cover; an insulating base plate is fixedly arranged on the inner side wall of the end plate of the cover shell; the circuit board assembly is fixedly connected to the stator body and is located between the insulating base plate and the first heat dissipation block.

2. The integrated heat dissipation motor of claim 1, wherein: the second heat dissipation block comprises a connecting body, an extension body and a fitting body which are sequentially connected into a whole; the connector is detachably and fixedly arranged on the bottom surface of the end cover; the attaching body is attached to the second heating area on the circuit board assembly.

3. The integrated heat dissipation motor of claim 1, wherein: the center of the outer side of the end plate is provided with a hollow shaft body which is integrally formed with the cover shell; the stator winding is fixedly connected to the hollow shaft body around the hollow shaft body; the outer rotor assembly comprises a rotating shaft, a shaft sleeve and a rotor body fixedly provided with magnetic steel; the rotating shaft is rotatably arranged in the hollow shaft body through a bearing; one end of the rotating shaft extending out of the hollow shaft body is fixedly connected with the rotor body through a shaft sleeve; the outer side of the end panel is provided with a rotary groove which is coaxial with the hollow shaft body; the open end of the rotor body is inserted into the spiral groove and can rotate in the spiral groove along with the rotation of the rotor body.

4. The integrated heat dissipation motor of claim 3, wherein: the outer edge of the rotary groove is provided with a raised water retaining strip; a plurality of water drainage grooves are distributed on the water bar along the circumference of the axis of the rotary groove; the water bar is broken by the water drainage groove and extends from the water bar to the bottom of the rotary groove in an inclined mode.

5. The integrated heat dissipation motor as claimed in claim 1, wherein: a waterproof snap ring is arranged on the end face of the cover shell matched with the end cover; a waterproof ring groove is arranged on the end face of the end cover matched with the cover shell; when the cover shell is fixedly connected with the end cover, the waterproof snap ring is clamped into the waterproof ring groove.

6. The integrated heat dissipation motor of claim 3, wherein: the outer edge of the spiral groove is lower than the inner edge of the spiral groove.

7. The integrated heat dissipation motor as claimed in claim 1, wherein: and the first radiating block and the second radiating block are fixedly connected with the first connecting block and the end cover through connecting screws respectively.