CN112421883A - Rotating electrical machine convenient to heat dissipation - Google Patents

Abstract

The invention discloses a rotating motor convenient for heat dissipation, and belongs to the technical field of motors. It includes: the motor rear cover is internally provided with a cavity; the rotating shaft is rotatably arranged on the rear cover of the motor; the rotor is connected to the rotating shaft and is positioned in the cavity; the stator is arranged in the cavity; the electronic assembly is arranged at the rear end of the rear cover of the motor; a cooling fan installed on the rotation shaft; further comprising: the heat-shielding structure is connected to the rear end of the rear cover of the motor, and the electronic assembly is arranged at the rear end of the heat-shielding structure; the wind shielding structure is arranged between the heat shielding structure and the rear cover of the motor, a gap is formed between the heat shielding structure and the wind shielding structure to form a first cooling air inlet channel, and an axial ventilation opening I is arranged at the rear end of the wind shielding structure; the rear end of the motor rear cover is provided with a second axial vent communicated with the cavity, the first axial vent is communicated with the second axial vent, and a plurality of radial air outlets communicated with the cavity are arranged on the periphery of the motor rear cover at intervals. The rotating electric machine convenient for heat dissipation of the invention can reliably dissipate heat.

Description

Rotating electrical machine convenient to heat dissipation

Technical Field

The invention relates to the technical field of motors, in particular to a rotating motor convenient for heat dissipation.

Background

At present, rotating electric machines are applied to hybrid cars, electric cars, and the like; when the rotating motor is applied to a hybrid electric vehicle, the rotating motor is used for driving tires of the vehicle, the rotating motor is also used as a generator for charging a battery, the hybrid electric vehicle is easy to repeatedly start and stop in the driving process, the stator is easy to generate a large amount of heat, in addition, the stator is easy to generate a large amount of heat by high-speed rotation of the rotating motor, if the temperature rise of the stator is not inhibited, the stator in the rear cover of the motor generates heat radiation when the temperature of the stator is higher, electronic components arranged on the rear cover of the motor mainly comprise a power module, a control module, a filter module and the like, wherein the power module is used for connecting and driving the rotating motor, the control module is used for generating a control signal and controlling the power module so as to control the working mode of the rotating motor, and the filter module is used for preventing the power module from interfering with a power grid of, the power module, the control module and the filtering module also generate heat in the using process, so that the power module, the control module and the filtering module are easily too high in temperature in the using process and cannot work normally or even be damaged, the reliable heat dissipation of the rotating motor is particularly important, the heat dissipation effect of the existing rotating motor is poor, and the service life of the rotating motor is further shortened. Accordingly, there is a need for a rotating electric machine that can reliably dissipate heat.

Disclosure of Invention

It is an object of the present invention to overcome at least one of the above-mentioned disadvantages of the prior art and to provide a rotating electric machine that facilitates heat dissipation.

The technical scheme for solving the technical problems is as follows: a rotating electrical machine that facilitates heat dissipation, comprising:

the motor rear cover is internally provided with a cavity;

the rotating shaft is rotatably arranged on the rear cover of the motor;

the rotor is connected to the rotating shaft and is positioned in the cavity;

the stator is arranged in the cavity and surrounds the periphery of the rotor;

the electronic assembly is arranged at the rear end of the motor rear cover;

the cooling fan is arranged on the rotating shaft, is positioned in the cavity and is positioned on one side of the rotor;

the rotating electric machine convenient for heat dissipation further includes:

the heat shielding structure is connected to the rear end of the motor rear cover through a connecting structure, and the electronic assembly is installed at the rear end of the heat shielding structure;

the wind shielding structure is arranged between the heat shielding structure and the motor rear cover, the edge of the wind shielding structure extends towards the circumferential side and covers the rear end of the motor rear cover, a gap is formed between the heat shielding structure and the wind shielding structure to form a first cooling air inlet duct, and the rear end of the wind shielding structure is provided with a first axial ventilation opening;

the rear end of lid behind the motor be equipped with axial vent two of cavity intercommunication, axial vent one with axial vent two intercommunications, the week side interval of lid behind the motor be equipped with a plurality ofly with the radial air outlet of cavity intercommunication, radial air outlet is located cooling fan's week side, when cooling fan is rotatory, cooling air inlet duct one can be followed week side and induced drafted and form cooling air current one, cooling air current one can flow through axial vent two gets into just can follow in the cavity radial air outlet discharges.

The invention has the beneficial effects that: according to the invention, the wind shielding structure is arranged between the heat shielding structure and the rear cover of the motor, and a gap is formed between the heat shielding structure and the wind shielding structure to form a first cooling air inlet channel, so that when the cooling fan rotates, air on the outer side of the first cooling air inlet channel can enter the cavity of the rear cover of the motor from the first cooling air inlet channel to absorb heat; in addition, the wind shielding structure can also shield hot air which is discharged from the radial air outlet of the motor rear cover and is formed by absorbing heat, and separate air flow formed by discharging the hot air from the radial air outlet of the motor rear cover from air flow formed by entering air from the cooling air inlet duct, so that the air flow formed by discharging the hot air from the radial air outlet of the motor rear cover and the air flow formed by entering air from the cooling air inlet duct are prevented from interfering with each other and mixing to form turbulent flow, the air inlet loss caused by the turbulent flow can be reduced, the ventilation is smoother, the cooling effect of the rotary motor is improved, the temperature of the motor rear cover is further favorably reduced, the heat radiation of the motor rear cover on an electronic component arranged on the motor rear cover is reduced, and the normal work of the electronic component arranged on the motor rear cover is ensured. Furthermore, the wind shielding structure and the heat shielding structure can respectively shield partial heat radiation generated by the motor rear cover to the electronic component on the heat shielding structure, so that the heat radiation of the electronic component received by the motor rear cover is further weakened, the overhigh temperature of the electronic component mounted on the motor rear cover is avoided, and the normal work of the electronic component is ensured. Therefore, the rotating electric machine convenient for heat dissipation can improve the heat dissipation efficiency.

In addition, on the basis of the above technical solution, the present invention may be further improved as follows, and may further have the following additional technical features.

According to one embodiment of the invention, the electronic assembly comprises:

the power module is installed through connection structure one keep off on the hot structure, power module with it forms cooling air inlet duct two to have the clearance between the hot structure to keep off, the rear end that keeps off the hot structure be equipped with the axial vent three of cavity intercommunication, just power module is located the three outside of axial vent, when cooling fan is rotatory, cooling air inlet duct two can be followed week side and induced drafted and form cooling air current two.

In this embodiment, a gap is formed between the power module and the heat blocking structure to form a second cooling air inlet duct, when the cooling fan rotates, the second cooling air inlet duct is induced from the peripheral side to form a second cooling air flow, and the second cooling air flow sweeps across one side of the power module, which faces the heat blocking structure, and exchanges heat with the power module, so that the power module is cooled, the heat dissipation efficiency of the power module is improved, and the power module is prevented from being overhigh in temperature and can normally work.

According to one embodiment of the invention, a plurality of cooling protrusions protruding towards the second cooling air inlet duct are arranged at intervals on the front side of the power module, and a plurality of heat dissipation bosses are arranged on the peripheral side surface of the power module and extend towards the outer side of the power module. In this embodiment, a plurality of cooling protrusions facing the second protrusions of the cooling air inlet duct are arranged at intervals on the front side of the power module, heat generated by the power module can be transferred to the cooling protrusions, the surface area of the power module contacting with air is increased by the plurality of cooling protrusions, heat exchange efficiency between the power module and the air is improved, and a heat dissipation effect of the power module is improved. In addition, the side of the power module in this embodiment is provided with a plurality of heat dissipation bosses, heat generated by the power module can be transferred to the heat dissipation bosses, the heat dissipation bosses further increase the surface area of the power module contacting with air, and further improve the heat exchange efficiency between the power module and the air and the heat dissipation effect of the power module.

According to one embodiment of the invention, a plurality of supporting protrusions are arranged on the rear side of the heat retaining structure corresponding to the plurality of heat dissipation bosses one by one, and the heat dissipation bosses are connected to the supporting protrusions in a stop manner. The rear side one-to-one of keeping off hot structure in this embodiment is a plurality of the heat dissipation boss is equipped with a plurality of supporting protrusion, and the boss end of just dispelling the heat is in on the supporting protrusion, the supporting protrusion is equivalent to the extension of heat dissipation boss to equivalent to the length that has extended the heat dissipation boss, make the heat that power module produced can transmit the heat dissipation boss and support protruding, and the boss that dispels the heat and support protruding further increase the surface area that power module and air contacted, further improvement power module carries out heat exchange efficiency and improvement power module's radiating effect with the air.

According to one embodiment of the invention, the electronic assembly further comprises:

control module is connected through connection structure two keep off the rear end of hot structure, just control module is located power module's rear end, control module with it forms cooling air inlet duct three to have the clearance between the power module, cooling air inlet duct three with three intercommunications of axial vent, when cooling fan is rotatory, cooling air inlet duct three can be followed week side and induced drafted formation cooling air current three.

The control module of this embodiment is installed keep off hot structural deviating from one side of lid behind the motor, control module with it forms cooling air inlet duct three to have the clearance between the power module, when cooling fan is rotatory, cooling air inlet duct three induced drafts from week side and forms cooling air current three, three control module orientation cooling air inlet duct three one side of sweeping of cooling air current and carry out heat exchange with control module to dispel the heat to control module, be favorable to improving control module's radiating efficiency, avoid control module's high temperature and ensure that control module can normally work. Meanwhile, the cooling airflow III sweeps one side of the power module, which faces the cooling air inlet duct III, and exchanges heat with the power module, so that the power module is cooled, and the heat dissipation efficiency of the power module is improved.

According to one embodiment of the invention, the electronic assembly further comprises:

the filtering module is connected through connection structure three keep off the rear end of hot structure and orientation be located on the radial direction of pivot the outside of power module, filtering module with it forms cooling air inlet duct four to have the clearance between the hot structure to keep off, cooling air inlet duct four with three intercommunications of axial vent, when cooling fan is rotatory, cooling air inlet duct four can be induced drafted from week side and form cooling air current four.

The filter module in this embodiment is installed keep off the rear end of hot structure and towards be located in the radial direction of pivot the outside of power module, and filter module with it forms cooling air inlet duct four to have the clearance between the hot structure to keep off, when cooling fan is rotatory, cooling air inlet duct four is induced drafted from week side and is formed cooling air current four, cooling air current four sweeps filter module towards the one side of keeping off hot structure and carries out the heat exchange with filter module to dispel the heat to filter module, be favorable to improving the radiating efficiency who controls filter module, avoid filter module's high temperature and ensure that filter module can normally work.

According to one embodiment of the invention, the edge of the wind shielding structure extends obliquely outwards away from the motor rear cover to form a side wind shielding part. The border of the structure of keeping out the wind in this embodiment deviates from the lid inclines out to extend and forms side wind-blocking portion behind the motor, side wind-blocking portion can increase the structure of keeping out the wind scope of week side direction, further improvement wind-blocking structure blocks the hot-air that forms from the radial air outlet exhaust of lid behind the motor through the heat absorption, further separate the air current that the radial air outlet discharge hot-air that covers behind the motor formed with the air current that gets into the air formation from cooling air inlet duct, avoid the air current that the radial air outlet discharge hot-air that covers behind the motor formed and the air current that gets into the air formation from cooling air inlet duct mutually interfere the mixed flow and form the turbulent flow, can reduce the air inlet loss that the turbulent flow leads to, it is more smooth and easy to ventilate, improve the cooling effect of rotating electrical machines.

According to one embodiment of the invention, the material of the wind-shielding structure is a material with low thermal conductivity. The material of the structure of keeping out the wind in this embodiment is low heat conductivity material, is favorable to reducing the heat radiation that the lid produced behind the motor and is conducting on the structure of keeping out the wind, improves the structure of keeping out the wind and blocks the effect of the partial heat radiation that the lid produced to the electronic component who keeps off on the hot structure behind the motor, further weakens the heat radiation that electronic component received the lid behind the motor, is favorable to avoiding installing the temperature of the electronic component who covers behind the motor too high to ensure that electronic component normally works.

According to one embodiment of the invention, a closed-loop bulge is connected to the front side of the wind shielding structure, the closed-loop bulge extends towards the rear motor cover to form an extending end, the extending end of the closed-loop bulge is located on the outer side of the axial vent II, the extending end of the closed-loop bulge is matched and abutted against the rear motor cover, and a groove body with one end sealed and the other end open is defined among the front side of the wind shielding structure, the closed-loop bulge and the rear motor cover. The structure of keeping out the wind in this embodiment is just right one side of lid is connected with the closed loop arch behind the motor, and but the protruding adaptation of closed loop end support of stopping the lid is just right behind the motor on one side of structure of keeping out the wind for keep out the wind the front side of structure closed loop protruding with inject behind the motor and form the open cell body of one end shutoff one end between the lid, can get into the air in the cell body, be favorable to reducing the heat that the lid produced behind the motor to the structure conduction of keeping out the wind, be favorable to reducing the temperature rise of installing the electronic component who covers behind the motor.

According to one embodiment of the invention, a plurality of connecting columns are arranged on the peripheral side of the motor rear cover at intervals, the connecting columns extend towards the heat retaining structure, and the wind shielding structure and the heat retaining structure are respectively connected to the extending ends of the connecting columns. This embodiment is equipped with a plurality of spliced poles through week side interval at keeping off hot structure, and the spliced pole orientation keep off hot structure extension, be convenient for with keep off the wind structure with keep off hot structure and connect respectively the extension of spliced pole is served, and the spliced pole is located the week side of keeping off hot structure, and the temperature of the week side of keeping off hot structure is lower a little relatively, can reduce the heat radiation that the lid produced behind the motor and conduct the structure of keeping off the wind and keep off hot structure through the spliced pole on from this, is favorable to reducing the temperature rise of installing the electronic component who covers behind the motor.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a rotating electrical machine facilitating heat dissipation according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1 after being straightened;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a left side view of FIG. 2;

FIG. 5 is a rear view of FIG. 2;

FIG. 6 is a view of FIG. 1 with parts broken away;

FIG. 7 is a schematic structural diagram of a power module according to an embodiment of the present invention;

FIG. 8 is a schematic bottom structure diagram of a power module according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a mounting case for mounting a filter module according to an embodiment of the present invention mounted on a heat shielding structure.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a motor rear cover, 2, a heat retaining structure, 3, a wind retaining structure, 4, a power module, 5, a control module, 6, a filtering module, 10, an axial vent II, 11, a rotating shaft mounting port, 12, a radial air outlet, 13, a first connecting lug, 14, a second connecting lug, 15, a third connecting lug, 16, a fourth connecting lug, 20, a third axial vent, 21, a fifth connecting lug, 22, a first supporting bulge, 23, a second supporting bulge, 24, a supporting column, 30, a first axial vent, 31, a side wind blocking part, 32, a side extension plate, 33, a sixth connecting lug, 40, a first heat dissipation lug, 41, a second heat dissipation lug, 42, a cooling bulge, 50, a screw mounting avoiding groove, 60, a mounting shell, 131, a first connecting column, 141, a second connecting column, 151, a third connecting column, 161, a fourth connecting column, 401, a first heat dissipation groove, 402, a first screw hole, 411, a second heat dissipation groove, 412 and a screw hole, 601. and a first ventilation opening.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The present embodiment provides a rotating electrical machine convenient for heat dissipation, as shown in fig. 1 to 9, a cavity is formed in a rear cover 1 of the electrical machine, and the cavity is formed in the rear cover 1 of the electrical machine;

the rotating shaft is rotatably arranged on the motor rear cover 1;

the rotor is connected to the rotating shaft and is positioned in the cavity;

the stator is arranged in the cavity and surrounds the periphery of the rotor;

the electronic assembly is arranged at the rear end of the motor rear cover 1;

the cooling fan is arranged on the rotating shaft, is positioned in the cavity and is positioned on one side of the rotor;

the rotating electric machine convenient for heat dissipation further includes:

the heat-shielding structure 2 is connected to the rear end of the motor rear cover 1 through a connecting structure, and the electronic assembly is arranged at the rear end of the heat-shielding structure 2;

the wind shielding structure 3 is arranged between the heat shielding structure 2 and the motor rear cover 1, the edge of the wind shielding structure 3 extends towards the circumferential side and covers the rear end of the motor rear cover 1, a gap is formed between the heat shielding structure 2 and the wind shielding structure 3 to form a first cooling air inlet duct, and the rear end of the wind shielding structure 3 is provided with a first axial ventilation opening 30;

the rear end of the motor rear cover 1 is provided with an axial vent two 10 communicated with the cavity, the axial vent one 30 is communicated with the axial vent two 10, a plurality of radial air outlets 12 communicated with the cavity are arranged on the periphery side of the motor rear cover 1 at intervals, the radial air outlets 12 are located on the periphery side of the cooling fan, when the cooling fan rotates, a cooling air inlet channel I can suck air from the periphery side to form a cooling air flow I, and the cooling air flow I can flow through the axial vent two 10 to enter the cavity and can be discharged from the radial air outlets 12.

In the present embodiment, as shown in fig. 1 to 9, a wind shielding structure 3 is arranged between a heat shielding structure 2 and a motor rear cover 1, and a gap is formed between the heat shielding structure 2 and the wind shielding structure 3 to form a first cooling air inlet duct, so that when a cooling fan rotates, air outside the first cooling air inlet duct can enter a cavity of the motor rear cover 1 from the first cooling air inlet duct to absorb heat; in addition, the wind shielding structure 3 can also shield hot air which is discharged from the radial air outlet 12 of the motor rear cover 1 and is formed by absorbing heat, and separate air flow formed by the hot air discharged from the radial air outlet 12 of the motor rear cover 1 from air flow formed by air entering from the cooling air inlet duct, so that the air flow formed by the hot air discharged from the radial air outlet 12 of the motor rear cover 1 and the air flow formed by the air entering from the cooling air inlet duct are prevented from interfering with each other and mixing to form turbulent flow, the air inlet loss caused by the turbulent flow can be reduced, the ventilation is smoother, the cooling effect of the rotary motor is improved, the temperature of the motor rear cover 1 is further favorably reduced, the heat radiation of the motor rear cover 1 to electronic components installed on the motor rear cover 1 is reduced, and the normal operation of the electronic components installed on the motor rear cover 1 is ensured. Further, the wind shielding structure 3 and the heat shielding structure 2 can respectively shield partial heat radiation generated by the motor rear cover 1 to the electronic component on the heat shielding structure 2, further weaken the heat radiation of the motor rear cover 1 on the electronic component, and are beneficial to avoiding overhigh temperature of the electronic component arranged on the motor rear cover 1, thereby ensuring normal work of the electronic component.

In the embodiment, as shown in fig. 6, a rotating shaft mounting opening 11 is formed in the middle of the rear end of the motor rear cover 1, and in the embodiment, a bearing is mounted in the rotating shaft mounting opening 11, and the rotating shaft is particularly rotatably mounted in the bearing mounted in the rotating shaft mounting opening 11; a plurality of axial ventilation openings 10 are arranged in the embodiment, and the plurality of axial ventilation openings 10 are uniformly distributed and arranged on the peripheral side of the rotating shaft mounting opening 11 at intervals close to the rotating shaft mounting opening 11; further, the rear end of the radial air outlet 12 close to the motor rear cover 1 in this embodiment is opened on the peripheral side wall of the motor rear cover 1, a part of the opening of the radial air outlet 12 is located on the rear side wall of the motor rear cover 1, and a plurality of radial air outlets 12 are provided; in addition, the shapes of the plurality of radial air outlets 12 in this embodiment may be various, and the radial air outlets 12 may be designed to have the same structure or different structures, the shapes of the axial vents 10 in this embodiment may be various, the radial air outlets 12 may be designed to have the same structure or different structures, and the shapes of the radial air outlets 12 and the axial vents 10 may be designed as required. Further, in addition, the axial ventilation opening one 30 in this embodiment may pass through the rotating shaft, the rotating shaft passes through the middle of the axial ventilation opening one 30, and a gap is formed between the outer side of the rotating shaft and the inner side wall of the axial ventilation opening one 30, that is, the through hole for passing through the rotating shaft and the through hole for passing through the air flow on the heat retaining structure 2 are communicated into a whole, and further, the axial ventilation opening one 30 in this embodiment may also have other various structures. In this embodiment, the rotating shaft, the rotor, and the cooling fan are not shown.

In one embodiment of the present invention, as shown in fig. 1 to 6, an electronic component includes: the power module 4 is installed on the heat blocking structure 2 through the first connecting structure, a gap is formed between the power module 4 and the heat blocking structure 2 to form a second cooling air inlet channel, the rear end of the heat blocking structure 2 is provided with a third axial ventilation opening 20 communicated with the cavity, the power module 4 is located on the outer side of the third axial ventilation opening 20, and when the cooling fan rotates, the second cooling air inlet channel can be induced from the peripheral side to form a second cooling air flow. In this embodiment, a gap is formed between the power module 4 and the heat blocking structure 2 to form a second cooling air inlet duct, when the cooling fan rotates, the second cooling air inlet duct is induced to wind from the peripheral side to form a second cooling air flow, and the second cooling air flow sweeps across one side of the power module 4 facing the heat blocking structure 2 and exchanges heat with the power module 4, so as to dissipate heat from the power module 4, thereby facilitating the improvement of the heat dissipation efficiency of the power module 4, and avoiding the over-high temperature of the power module 4 to ensure the normal work of the power module 4.

In this embodiment, as shown in fig. 6 and 9, the heat shielding structure 2 is a plate-shaped structure, the axial ventilation opening three 20 is disposed in the middle of the heat shielding structure 2, in addition, the axial ventilation opening three 20 in this embodiment can pass through the rotating shaft, the rotating shaft passes through the middle of the axial ventilation opening three 20, and a gap is formed between the outer side of the rotating shaft and the inner side wall of the axial ventilation opening three 20, that is, the through opening for passing through the rotating shaft and the through opening for passing through the air flow on the heat shielding structure 2 are communicated into a whole, further, the axial ventilation opening three 20 in this embodiment may also have other various structures, which is not described herein again.

In an embodiment of the present invention, as shown in fig. 8, a plurality of cooling protrusions 42 protruding toward the cooling air inlet duct are spaced apart from the front side of the power module 4, and a plurality of heat dissipation bosses are disposed on the peripheral side of the power module 4 and extend toward the outer side of the power module 4. In this embodiment, a plurality of cooling protrusions 42 protruding toward the cooling air inlet duct are spaced at the front side of the power module 4, so that heat generated by the power module 4 can be transferred to the cooling protrusions 42, and the plurality of cooling protrusions 42 increase the surface area of the power module 4 contacting with air, thereby improving the heat exchange efficiency between the power module 4 and the air and improving the heat dissipation effect of the power module 4. In addition, the side of the power module 4 in this embodiment is provided with a plurality of heat dissipation bosses, heat generated by the power module 4 can be transferred to the heat dissipation bosses, the heat dissipation bosses further increase the surface area of the power module 4 contacting with air, and further improve the heat exchange efficiency between the power module 4 and the air and the heat dissipation effect of the power module 4. Further, the cooling protrusions 42 in this embodiment are plate-shaped structures, and an air duct is formed between two cooling protrusions 42, and in addition, the cooling protrusions 42 may be designed into other structures.

In an embodiment of the present invention, as shown in fig. 1, 6 and 9, a plurality of supporting protrusions are disposed on the rear side of the heat retaining structure 2 corresponding to the plurality of heat dissipating bosses one by one, and the heat dissipating bosses are connected to the supporting protrusions in a stop manner. In this embodiment, a plurality of heat dissipation bosses that keep off the rear side one-to-one of hot structure 2 are equipped with a plurality of support protrusions, and the boss end of dispelling the heat is supported on support protrusion, support protrusion is equivalent to the extension of heat dissipation boss, thereby equivalent to the length that has extended heat dissipation boss, make the heat that power module 4 produced can transmit to heat dissipation boss and support protrusion on, and the boss that dispels the heat and support protrusion further increase the surface area that power module 4 and air contact, further improvement power module 4 carries out heat exchange efficiency and improvement power module 4's radiating effect with the air.

In this embodiment, the power module 4 is provided with three, the peripheral side of the power module 4 shown in the figure of this embodiment is provided with two heat dissipation bosses, which are respectively a first heat dissipation boss 40 and a second heat dissipation boss 41, and correspondingly, the rear end of the heat retaining structure 2 in this embodiment is provided with two support protrusions corresponding to each power module 4, the support protrusions are respectively a first support protrusion 22 and a second support protrusion 23, further, the support protrusions of this embodiment are also used as a first connecting structure for connecting the power module 4 and the heat retaining structure 2, the first heat dissipation boss 40 is provided with a first screw hole 402, the first screw hole 402 on the first heat dissipation boss 40 corresponding to the first support protrusion 22 is provided with a screw hole, the first heat dissipation boss 40 is fixedly connected to the first support protrusion 22 through a screw, the second heat dissipation boss 41 is provided with a second screw hole 412, the second screw hole 412 on the second heat dissipation boss 23, the second heat dissipation boss 41 is fixedly connected to the second support boss 23 through a screw; of course, it is also possible to separately provide the first connecting structure for mounting the power module 4 on the heat shield structure 2, and to fix the power module 4 to the heat shield structure 2 by mounting the power module 4 on the first connecting structure. It should be noted that, in the embodiment, the first heat dissipation bosses 40 and the second heat dissipation bosses 41 shown in the figure are different in structure, the first heat dissipation bosses 40 and the second heat dissipation bosses 41 may also be designed to have the same structure, the first support protrusions 22 and the second support protrusions 23 shown in the figure are different in structure, the first heat dissipation bosses 40 and the second heat dissipation bosses 41 may also be designed to have the same structure, in addition, the number of the first heat dissipation bosses and the number of the second support protrusions in the embodiment may also be three, four, and the like, and the structures of the first heat dissipation bosses and the second support protrusions may also have various structures.

In this embodiment, as shown in fig. 7, a first heat dissipation groove 401 for dissipating heat is formed on the first heat dissipation boss 40 in this embodiment, one end of the first heat dissipation groove 401 is open, air can enter the first heat dissipation groove 401, and the heat dissipation effect of the first heat dissipation boss 40 is improved; a second heat dissipation groove 411 for heat dissipation is formed in the second heat dissipation boss 41, and one end of the second heat dissipation groove 411 is open; air can enter the second heat dissipation groove 411, and the heat dissipation effect of the second heat dissipation boss 41 is improved. Further, the structure of the first heat sink 401 and the second heat sink 411 in this embodiment may have various structures.

In one embodiment of the present invention, as shown in fig. 1 to 6, the electronic component further includes: the control module 5 is connected to the rear end of the heat retaining structure 2 through the second connecting structure, the control module 5 is located at the rear end of the power module 4, a gap is formed between the control module 5 and the power module 4 to form a third cooling air inlet duct, the third cooling air inlet duct is communicated with the third axial ventilation opening 20, and when the cooling fan rotates, the third cooling air inlet duct can suck air from the peripheral side to form a third cooling air flow.

In this embodiment, as shown in fig. 1 to 6, the control module 5 is installed on one side of the heat shielding structure 2 away from the rear cover 1 of the motor, a gap is formed between the control module 5 and the power module 4 to form a third cooling air inlet duct, when the cooling fan rotates, the third cooling air inlet duct is induced to form a third cooling air flow from the peripheral side, and the third cooling air flow sweeps over one side of the control module 5 facing the third cooling air inlet duct and exchanges heat with the control module 5, so as to dissipate heat of the control module 5, which is beneficial to improving the heat dissipation efficiency of the control module 5, and avoid over-high temperature of the control module 5 to ensure that the control module 5 can normally work. Meanwhile, the cooling air flow III sweeps across one side of the power module 4 facing the cooling air inlet duct III and exchanges heat with the power module 4, so that the power module 4 is cooled, and the heat dissipation efficiency of the power module 4 is improved.

In one embodiment of the present invention, as shown in fig. 1 to 6, the electronic component further includes: the filtering module 6 is connected to the rear end of the heat retaining structure 2 through the third connecting structure and is located on the outer side of the power module 4 in the radial direction towards the rotating shaft, a gap is formed between the filtering module 6 and the heat retaining structure 2 to form a fourth cooling air inlet channel, the fourth cooling air inlet channel is communicated with the third axial ventilation opening 20, and when the cooling fan rotates, the fourth cooling air inlet channel can be induced draft from the peripheral side to form a fourth cooling air flow.

In this embodiment, as shown in fig. 1 to 6 and 9, the filtering module 6 is installed at the rear end of the heat shielding structure 2 and located outside the power module 4 in the radial direction toward the rotating shaft, and a gap is formed between the filtering module 6 and the heat shielding structure 2 to form a cooling air inlet duct four, when the cooling fan rotates, the cooling air inlet duct four sucks air from the peripheral side to form a cooling air flow four, and the cooling air flow four sweeps across one side of the filtering module 6 toward the heat shielding structure 2 and exchanges heat with the filtering module 6, so as to dissipate heat from the filtering module 6, thereby facilitating to improve the heat dissipation efficiency of the filtering module 6, and avoiding the over-high temperature of the filtering module 6 to ensure that the filtering module 6 can normally operate. Further, in the present embodiment, a side extension plate 32 is connected to one side of the wind shielding structure 3, and the filter module 6 in the present embodiment is installed at the rear end of the side extension plate 32; specifically, the filter module 6 is installed in the installation housing 60, the heat shielding structure 2 is provided with an installation part for installing the filter module 6 corresponding to the side extension plate 32 of the wind shielding structure 3, the installation housing 60 is installed on the installation part, the installation housing 60 forms a cavity for installing the filter module 6, further, the rear end of the circumferential side of the installation housing 60 in the embodiment is provided with a first ventilation opening 601 for ventilating air into the installation housing 60, in addition, each side wall of the installation housing 60 can be provided with ventilation openings, and the shapes and the sizes of the ventilation openings can be various; further, the third connecting structure in this embodiment is a supporting leg on the mounting housing 60, and the third connecting structure may also be other structures.

In the present embodiment, as shown in fig. 6 and 9, a plurality of connection columns are provided at intervals on the circumferential side of the motor rear cover 1, the plurality of connection columns extend toward the heat retaining structure 2, and the wind shielding structure 3 and the heat retaining structure 2 are respectively connected to the extending ends of the connection columns. In this embodiment, be equipped with a plurality of spliced poles through week side interval at fender hot structure 2, and the spliced pole extends towards fender hot structure 2, be convenient for to connect structure 3 and fender hot structure 2 respectively at the extension of spliced pole and serve, and the spliced pole is located the week side of keeping off hot structure 2, the temperature of the week side of keeping off hot structure 2 is lower a little relatively, can reduce behind the motor thermal radiation that lid 1 produced and conduct on keeping off hot structure 3 and keeping off hot structure 2 through the spliced pole from this, be favorable to reducing the temperature rise of installing the electronic component on lid 1 behind the motor.

In this embodiment, as shown in fig. 6, the wind shielding structure 3 is a plate-shaped structure, one side of the wind shielding structure 3 is connected with a side extension plate 32, the periphery of the motor rear cover 1 in this embodiment is provided with a plurality of connection lugs protruding to the outside and connection posts respectively connected to the connection lugs, the plurality of connection lugs include a first connection lug 13, a second connection lug 14, a third connection lug 15 and a fourth connection lug 16, the first connection lug 13 is connected with a first connection post 131, the second connection lug 14 is connected with a second connection post 141, the third connection lug 15 is connected with a third connection post 151, and the fourth connection lug 16 is connected with a fourth connection post 161; in the embodiment, a plurality of connecting lugs six 33 are arranged on the wind shielding structure 3 and are connected to the motor rear cover 1 in a one-to-one correspondence manner, the plurality of connecting lugs six 33 are connected to the edge of the wind shielding structure 3 and extend to the side to form a bulge, and a plurality of connecting lugs six 33 are arranged on the side extending plate 32 on the wind shielding structure 3 and correspond to the connecting lugs in front of the wind shielding structure; furthermore, a plurality of fifth lugs 21 are arranged on a plurality of sixth lugs 33 which are connected to the wind shielding structure 3 in a one-to-one correspondence manner on the heat shielding structure 2 in the embodiment, the fifth lugs 21 are connected to the edge of the heat shielding structure 2, and extend to the opposite side to form a protrusion, in addition, a first connecting column 131, a second connecting column 141, a third connecting lug 15, a fourth connecting lug 16, the fifth connecting lug 21 and the sixth connecting lug 33 in the embodiment are all provided with screw holes, and screws are respectively screwed in the screw holes to fix the wind shielding structure 3 and the heat shielding structure 2 on the first connecting column 131, the second connecting column 141, the third connecting column 151 and the fourth connecting column 161. It should be noted that, the structure of the plurality of engaging lugs in this embodiment is different, and the plurality of engaging lugs may also be designed to be the same structure, and in addition, the structure of the plurality of connecting columns in this embodiment is different, and the plurality of connecting columns may also be designed to be the same structure, and the number, structure and arrangement manner of the engaging lugs and the connecting columns may all be various, so that it is convenient to install the heat shielding structure 2 and the wind shielding structure 3.

In this embodiment, as shown in fig. 1 to 6, the second connecting structure is a supporting column 24, the control module 5 is installed on the supporting column 24, four supporting columns 24 are provided, the four supporting columns 24 are uniformly distributed and spaced near the edge of the wind shielding structure 3, the height of the supporting column 24 is greater than the thickness of the power module 4, in addition, the number and the position of the supporting columns 24 can be adjusted according to the requirement, and the second connecting structure in this embodiment can also be other structures; further, in order to facilitate the installation of the control module 5, in this embodiment, the screw installation avoiding groove 50 is formed in the edge of the casing of the control module 5, and the screw hole is formed in the position of the screw installation avoiding groove 50, so that the control module 5 is fixed on the support column 24 through the screw.

In one embodiment of the present invention, as shown in fig. 1 and 6, the edge of the wind shielding structure 3 extends obliquely outward away from the motor rear cover 1 to form a side wind shielding portion 31. In this embodiment, the edge of the wind shielding structure 3 deviates from the motor rear cover 1 and extends outward in an inclined manner to form a side wind shielding portion 31, the side wind shielding portion 31 can increase the wind shielding range of the wind shielding structure 3 in the circumferential direction, the further improvement of the wind shielding structure 3 shields hot air which is discharged from the radial air outlet 12 of the motor rear cover 1 and is formed by heat absorption, further, the air flow formed by the hot air discharged from the radial air outlet 12 of the motor rear cover 1 and the air flow formed by air entering from the cooling air inlet duct are separated, the air flow formed by the hot air discharged from the radial air outlet 12 of the motor rear cover 1 and the air flow formed by air entering from the cooling air inlet duct are prevented from interfering with each other and mixing to form turbulence, air inlet loss caused by turbulence can be reduced, ventilation is smoother, and the cooling effect of the rotary motor is improved. Further, the side wind shielding portion 31 in the present embodiment may have various structures, so as to increase the wind shielding range of the wind shielding structure 3 in the circumferential direction.

In one embodiment of the invention, the material of the wind-shielding structure 3 is a material with low thermal conductivity. In this embodiment, the material of structure 3 keeps out the wind is the low heat conductivity material, is favorable to reducing the heat radiation that lid 1 produced behind the motor and conducts on structure 3 keeps out the wind, improves structure 3 that keeps out the wind and blocks the effect of the partial heat radiation that lid 1 produced to the electronic component that keeps off on the hot structure 2 behind the motor, further weakens electronic component and receives lid 1's behind the motor heat radiation, is favorable to avoiding installing the electronic component's on lid 1 behind the motor high temperature to ensure that electronic component normally works.

According to one embodiment of the invention, the front side of the wind shielding structure 3 is connected with a closed-loop bulge, the closed-loop bulge extends towards the motor rear cover 1 to form an extending end, the extending end of the closed-loop bulge is positioned on the outer side of the axial ventilation opening II 10, the extending end of the closed-loop bulge is matched and abutted against the motor rear cover 1, and a groove body with one end sealed and the other end open is limited and formed among the front side of the wind shielding structure 3, the closed-loop bulge and the motor rear cover 1. In this embodiment, structure 3 keeps out the wind is just being connected with the closed loop arch to one side of lid 1 behind the motor, but and closed loop arch adaptation butt lid 1 just to keep out the wind structure 3 one side behind the motor on, make structure 3's front side keeps out the wind, inject between closed loop arch and the motor back lid 1 and form the open cell body of one end shutoff one end, accessible air in the cell body, be favorable to reducing the heat that lid 1 produced behind the motor and to the conduction of structure 3 that keeps out the wind, be favorable to reducing the temperature rise of installing the electronic component on lid 1 behind the motor. It should be noted that the closed-loop protrusion in this embodiment is not shown, and the specific arrangement manner of the closed-loop protrusion may be various.

It should be noted that, in the present embodiment, the output end of the rotating electrical machine is used as the front end, and the motor rear cover 1 is used as the rear end as the reference orientation; of course, the placement mode of the rotating motor is different, and the positions of all parts of the rotating motor are changed; furthermore, the size of each cooling air inlet duct in this embodiment can be designed appropriately according to needs, and the structure of each cooling air inlet duct can be various, which is not described herein again; further, the working principle and other components of the power module 4, the control module 5 and the filtering module 6 in this embodiment all belong to the prior art in the field, and are not described herein again.

In addition to the technical solutions disclosed in the present embodiment, for the power module 4, the control module 5, the filter module 6, the rotor, the stator, other components of the rotating electrical machine, and the operating principle of the rotating electrical machine in the present invention, reference may be made to conventional technical solutions in the present technical field, which are not the gist of the present invention, and the present invention is not described in detail herein.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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 rotating electrical machine that facilitates heat dissipation, comprising:

the motor rear cover is internally provided with a cavity;

the rotating shaft is rotatably arranged on the rear cover of the motor;

the rotor is connected to the rotating shaft and is positioned in the cavity;

the stator is arranged in the cavity and surrounds the periphery of the rotor;

the electronic assembly is arranged at the rear end of the motor rear cover;

the cooling fan is arranged on the rotating shaft, is positioned in the cavity and is positioned on one side of the rotor;

it is characterized by also comprising:

the heat shielding structure is connected to the rear end of the motor rear cover through a connecting structure, and the electronic assembly is installed at the rear end of the heat shielding structure;

the wind shielding structure is arranged between the heat shielding structure and the motor rear cover, the edge of the wind shielding structure extends towards the circumferential side and covers the rear end of the motor rear cover, a gap is formed between the heat shielding structure and the wind shielding structure to form a first cooling air inlet duct, and the rear end of the wind shielding structure is provided with a first axial ventilation opening;

the rear end of lid behind the motor be equipped with axial vent two of cavity intercommunication, axial vent one with axial vent two intercommunications, the week side interval of lid behind the motor be equipped with a plurality ofly with the radial air outlet of cavity intercommunication, radial air outlet is located cooling fan's week side, when cooling fan is rotatory, cooling air inlet duct one can be followed week side and induced drafted and form cooling air current one, cooling air current one can flow through axial vent two gets into just can follow in the cavity radial air outlet discharges.

2. The rotating electric machine facilitating heat dissipation according to claim 1, wherein the electronic component includes:

the power module is installed through connection structure one keep off on the hot structure, power module with it forms cooling air inlet duct two to have the clearance between the hot structure to keep off, the rear end that keeps off the hot structure be equipped with the axial vent three of cavity intercommunication, just power module is located the three outside of axial vent, when cooling fan is rotatory, cooling air inlet duct two can be followed week side and induced drafted and form cooling air current two.

3. The rotating electrical machine convenient for heat dissipation according to claim 2, wherein a plurality of cooling protrusions protruding toward the second cooling air inlet duct are provided at intervals on the front side of the power module, and a plurality of heat dissipation bosses are provided on the peripheral side surface of the power module, the heat dissipation bosses extending toward the outside of the power module.

4. The rotating electrical machine convenient for heat dissipation according to claim 3, wherein a plurality of supporting protrusions are provided on the rear side of the heat retaining structure corresponding to the plurality of heat dissipation bosses one by one, and the heat dissipation bosses are connected to the supporting protrusions in a stop manner.

5. The rotating electrical machine facilitating heat dissipation according to claim 2, wherein the electronic component further includes:

control module is connected through connection structure two keep off the rear end of hot structure, just control module is located power module's rear end, control module with it forms cooling air inlet duct three to have the clearance between the power module, cooling air inlet duct three with three intercommunications of axial vent, when cooling fan is rotatory, cooling air inlet duct three can be followed week side and induced drafted formation cooling air current three.

6. The rotating electric machine facilitating heat dissipation according to claim 2 or 5, wherein the electronic component further includes:

the filtering module is connected through connection structure three keep off the rear end of hot structure and orientation be located on the radial direction of pivot the outside of power module, filtering module with it forms cooling air inlet duct four to have the clearance between the hot structure to keep off, cooling air inlet duct four with three intercommunications of axial vent, when cooling fan is rotatory, cooling air inlet duct four can be induced drafted from week side and form cooling air current four.

7. A rotating electrical machine facilitating heat dissipation according to any of claims 1 to 5, wherein the edge of the wind shielding structure extends obliquely outward away from the machine back cover to form a side wind shield.

8. The rotating electric machine facilitating heat dissipation according to any one of claims 1 to 5, wherein a material of the wind shielding structure is a low thermal conductive material.

9. The rotating electrical machine convenient for heat dissipation according to claim 8, wherein a closed loop protrusion is connected to the front side of the wind shielding structure, the closed loop protrusion extends towards the rear motor cover to form an extending end, the extending end of the closed loop protrusion is located on the outer side of the second axial ventilation opening, the extending end of the closed loop protrusion is fitted and abutted to the rear motor cover, and a groove body with one end sealed and the other end open is defined among the front side of the wind shielding structure, the closed loop protrusion and the rear motor cover.

10. The rotating electrical machine convenient for heat dissipation according to any one of claims 1 to 5, wherein a plurality of connecting columns are provided at intervals around the rear cover of the electrical machine, the plurality of connecting columns extend toward the heat retaining structure, and the wind shielding structure and the heat retaining structure are respectively connected to the extending ends of the connecting columns.

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