CN213151835U

CN213151835U - Wheel hub motor cooling system

Info

Publication number: CN213151835U
Application number: CN202022298016.9U
Authority: CN
Inventors: 高一; 苍衍; 徐德才; 刘金锋; 李全; 田博; 侯毅鹏; 丛鹏泉
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-05-07
Anticipated expiration: 2030-10-15

Abstract

The utility model discloses an in-wheel motor cooling system belongs to motor cooling technical field, including in-wheel motor, in-wheel motor includes: the motor shell is provided with a first cooling oil inlet; the motor stator is arranged in the motor shell and comprises a stator core and a stator winding wound on the stator core, and the stator core is provided with an oil passing groove which is communicated with the first cooling oil inlet and extends along the axial direction of the first cooling oil inlet; the oil collecting rings are arranged in the motor shell and are respectively located on two axial sides of the stator core, oil containing grooves which are connected with the oil grooves are formed in the oil collecting rings, and first oil spraying holes which are communicated with the oil containing grooves and can spray cooling oil to the stator winding are formed in the oil collecting rings. Compare in prior art, can directly cool off stator winding, the cooling effect is good, and can simplify motor casing's structure, reduces motor casing's volume.

Description

Wheel hub motor cooling system

Technical Field

The utility model relates to a motor cooling technology field especially relates to a wheel hub motor cooling system.

Background

An electric automobile hub motor is a device which integrates a motor, a transmission system and a braking system in an automobile hub. Compared with a centralized drive mode, the electric automobile has the following advantages by adopting the hub motor: a large number of transmission parts are omitted, so that the vehicle structure is simpler; the driving force of each electric wheel is directly and independently controllable, so that the mechanical control of the electric wheels is more flexible and convenient, the driving force of each electric wheel can be reasonably controlled, and the driving performance under the condition of a severe road surface is improved; the electric braking, the electromechanical composite braking and the braking energy feedback of each electric wheel are easy to realize, and the energy is saved.

The calorific capacity of in-wheel motor in the course of the work can increase along with the increase of in-wheel motor power and moment of torsion, but motor work has certain temperature restriction, exceed this restriction motor power with greatly reduced, cause the motor to damage even, in order to make in-wheel motor can normally work under the temperature that the motor allows, current in-wheel motor adopts water-cooled mode cooling motor casing usually, then through motor casing indirect cooling stator core, unable direct cooling stator winding, the cooling effect is relatively poor, and adopt water-cooled mode motor casing complicated structure usually, and is bulky.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wheel hub motor cooling system to solve the water-cooled mode cooling motor casing that adopts that exists among the prior art, then through motor casing indirect cooling stator core, unable direct cooling stator winding, the cooling effect is relatively poor, and adopts water-cooled mode motor casing structure complicated usually, the great problem of volume.

As the conception, the utility model adopts the technical proposal that:

an in-wheel motor cooling system comprising an in-wheel motor, the in-wheel motor comprising:

the motor shell is provided with a first cooling oil inlet;

the motor stator is arranged in the motor shell and comprises a stator core and a stator winding wound on the stator core, and the stator core is provided with an oil passing groove which is communicated with the first cooling oil inlet and extends along the axial direction of the first cooling oil inlet;

the oil collecting rings are arranged in the motor shell and are respectively located on two axial sides of the stator core, and oil containing grooves communicated with the oil passing grooves and first oil spraying holes communicated with the oil containing grooves and capable of spraying cooling oil to the stator winding are formed in the oil collecting rings.

Further, the motor shell comprises a motor main shell and a motor end cover, and an accommodating cavity for accommodating the motor stator is formed between the motor end cover and the motor main shell in an enclosing manner; the in-wheel motor still includes:

the motor rotor comprises a rotating shaft, and an oil duct is formed in the rotating shaft along the axial direction of the rotating shaft;

the bearing is equipped with two, two bearings set up respectively in the main casing of motor body with the motor end cover, wear to locate two respectively at the both ends of pivot the bearing, motor end cover rather than correspond form the intercommunication between the bearing the sealed chamber of oil duct, set up the intercommunication on the motor end cover the second cooling oil import in sealed chamber, the pivot is kept away from the one end in sealed chamber is seted up the intercommunication the second nozzle opening of oil duct, the second nozzle opening can to set up in on the main casing of motor body the bearing sprays the cooling oil.

Furthermore, an oil injection retaining ring surrounding the rotating shaft is arranged on the main shell of the motor, an oil injection retaining cavity is formed between the oil injection retaining ring and the corresponding bearing, and the second oil injection hole can inject cooling oil into the oil injection retaining cavity so that the cooling oil flows to the bearing.

Further, still include the cooling oil and advance the pipe, the cooling oil advances the pipe set up in the motor casing outside, just the cooling oil advances the pipe intercommunication first cooling oil import with the import of second cooling oil.

Further, still include oil pump and oil storage tank, the oil pump passes through the pipeline intercommunication the oil storage tank with the cooling oil advances the pipe, set up the intercommunication on the motor casing hold the oil gallery in the chamber, the oil gallery pass through the pipeline communicate in the oil storage tank.

Furthermore, one of them oil collecting ring butt in motor casing is in one side of stator core axial direction, another oil collecting ring is provided with a plurality of fixed ears, correspond every on the motor casing fixed ear is provided with the fixed station, every fixed ear connect in corresponding the fixed station, two oil collecting ring is used for pressing from both sides tightly jointly the stator core.

Furthermore, the fixing lug is provided with a through hole, the fixing platform is provided with a fastening hole, and a fastening piece can penetrate through the through hole and extend into the corresponding fastening hole so as to connect the fixing lug with the corresponding fixing platform.

Further, the fastener is a bolt, and the fastening hole is a threaded hole matched with the bolt. Furthermore, a positioning insertion block is arranged on the oil collecting ring which is abutted to one side of the motor shell in the axial direction of the stator core, a positioning insertion groove is formed in the motor shell, and the positioning insertion block is inserted into the positioning insertion groove.

Furthermore, the oil containing grooves on the oil collecting rings extend along the circumferential direction of the oil collecting rings, and the length of each oil containing groove is smaller than or equal to the length of the corresponding oil collecting ring.

The utility model has the advantages that:

the utility model provides a wheel hub motor cooling system, including the wheel hub motor, the wheel hub motor includes motor casing, motor stator and oil collecting ring, has seted up the first coolant oil import on the motor casing; the motor stator is arranged in the motor shell and comprises a stator core and a stator winding wound on the stator core, and the stator core is provided with an oil passing groove which is communicated with the first cooling oil inlet and extends along the axial direction of the first cooling oil inlet; the oil collecting rings are arranged in the motor shell, are respectively arranged on two sides of the stator core in the axial direction, are provided with oil containing grooves connected with the oil grooves and first oil spraying holes communicated with the oil containing grooves and capable of spraying cooling oil to the stator winding. The cooling oil can get into motor casing by first cooling oil import, later through the oil groove get into two flourishing oil grooves in, later through first nozzle opening injection to stator winding, compare in prior art, can directly cool off stator winding, the cooling effect is good, and can simplify motor casing's structure, reduces motor casing's volume.

Drawings

Fig. 1 is a schematic structural diagram of a wheel hub motor cooling system provided by the present invention;

fig. 2 is a schematic cross-sectional view of the hub motor provided by the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

fig. 5 is a front view of a stator core provided by the present invention;

fig. 6 is a schematic structural diagram of a first oil collecting ring provided by the present invention;

fig. 7 is a schematic structural diagram of a second oil collecting ring provided by the present invention.

In the figure:

1. a hub motor; 11. a motor main housing; 111. oil injection baffle ring; 12. a motor end cover; 13. a motor stator; 131. a stator core; 1311. an oil passing groove; 132. a stator winding; 14. a first oil collecting ring; 141. positioning the insert block; 15. a second oil collecting ring; 151. fixing the ear; 1511. perforating holes; 101. an oil containing groove; 102. a first oil jet hole; 16. a rotating shaft; 161. an oil passage; 162. a second oil jet hole; 17. a first bearing; 18. a second bearing;

2. a cooling oil inlet pipe; 3. an oil pump; 4. an oil reservoir;

10. an accommodating chamber; 20. sealing the cavity; 30. and an oil spraying baffle cavity.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 7, the present embodiment provides an in-wheel motor cooling system including an in-wheel motor 1, the in-wheel motor 1 including a motor housing, a motor stator 13, and a oil collecting ring. Wherein, the motor casing is provided with a first cooling oil inlet. Motor stator 13 sets up in the motor housing, and motor stator 13 includes stator core 131 and the stator winding 132 of locating on stator core 131, has seted up the first cooling oil import of intercommunication and has passed oil groove 1311 along its axial extension on stator core 131. The number of the oil collecting rings is two, the two oil collecting rings are arranged in the motor shell and are respectively located on two axial sides of the stator core 131, and the oil collecting rings are provided with an oil containing groove 101 communicated with the oil passing groove 1311 and a first oil injection hole 102 communicated with the oil containing groove 101 and capable of injecting cooling oil to the stator winding 132.

It can be understood that cooling oil can get into motor casing by first cooling oil import, then get into two oil containing grooves 101 by crossing oil groove 1311, later spout to stator winding 132 through first oil spout 102 in, compare prior art, can directly cool off stator winding 132, and the cooling effect is good, and can simplify motor casing's structure, reduces motor casing's volume.

Further, as shown in fig. 1 and 2, the motor housing includes a motor main housing 11 and a motor end cover 12, and an accommodating cavity 10 for accommodating a motor stator 13 is enclosed between the motor end cover 12 and the motor main housing 11. The hub motor further comprises a motor rotor and a bearing, wherein the motor rotor comprises a rotating shaft 16, and an oil channel 161 is formed in the rotating shaft 16 along the axial direction of the rotating shaft. The bearing is equipped with two, two bearings set up respectively in motor main casing body 11 and motor end cover 12, two bearings are worn to locate respectively at the both ends of pivot 16, motor end cover 12 and rather than forming the sealed chamber 20 of intercommunication oil duct 161 between the bearing that corresponds, set up the second coolant oil import of intercommunication sealed chamber 20 on the motor end cover 12, the second nozzle opening 162 of intercommunication oil duct 161 is seted up to the one end that the sealed chamber 20 is kept away from to pivot 16, second nozzle opening 162 can be to setting up the bearing injection coolant oil on motor main casing body 11.

For convenience of description, the bearing provided on the motor end cover 12 is defined as a first bearing 17, and the bearing provided on the motor main housing 11 is defined as a second bearing 18. It will be appreciated that the cooling oil entering the seal chamber 20 through the second cooling oil inlet first cools the first bearing 17, then enters the oil passage 161 of the rotating shaft 16 to cool the rotating shaft 16, and then is injected into the second bearing 18 through the second oil injection hole 162 to cool the second bearing 18. Finally, the motor rotor and the two bearings are cooled.

Further, in the present embodiment, the second oil jet hole 162 is provided in plurality, and the plurality of second oil jet holes 162 are provided at intervals in the circumferential direction of the oil passage 161, so that the cooling oil in the oil passage 161 can be continuously injected toward the second bearing 18 through the plurality of second oil jet holes 162 during the rotation of the rotating shaft 16.

Further, in the present embodiment, the motor main housing 11 has the oil injection baffle ring 111 disposed around the rotating shaft 16, the oil injection baffle cavity 30 is formed between the oil injection baffle ring 111 and the second bearing 18, and the second oil injection hole 162 is capable of injecting the cooling oil into the oil injection baffle cavity 30. During the rotation of the rotating shaft 16, the cooling oil is sprayed out through the second oil spray hole 162, and in order to enable the cooling oil to efficiently cool the second bearing 18, the cooling oil sprayed out through the second oil spray hole 162 is blocked by the oil spray baffle ring 111, so that the cooling oil can flow to the second bearing 18.

As shown in fig. 2, 6 and 7, one of the two oil collecting rings abuts against one side of the motor main housing 11 in the axial direction of the stator core 131, the other oil collecting ring is provided with a plurality of fixing lugs 151, a fixing table is arranged on the motor main housing 11 corresponding to each fixing lug 151, each fixing lug 151 is connected to the corresponding fixing table, and the two oil collecting rings are used for clamping the stator core 131 together.

For convenience of description, the oil gathering ring provided with the fixing lug 151 is defined as the second oil gathering ring 15, and the other oil gathering ring is defined as the first oil gathering ring 14. Specifically, the motor main housing 11 is a tubular structure with an opening at one end, the first oil collecting ring 14 abuts against the closed end of the tubular structure, the second oil collecting ring 15 is connected to the motor main housing 11, and the stator core 131 is clamped tightly by the first oil collecting ring 14 and the second oil collecting ring 15 to limit the stator core 131. And because the second oil collecting ring 15 is connected to the motor main housing 11, the stator core 131 and the motor main housing 11 can be prevented from causing axial displacement of the stator core 131 relative to the motor main housing 11 due to different degrees of thermal expansion.

Further, each fixing lug 151 is provided with a through hole 1511, each fixing platform is provided with a fastening hole, and a fastening piece (not shown in the figure) can penetrate through the through hole 1511 and extend into the corresponding fastening hole to connect the fixing lug 151 and the corresponding fixing platform, so that the second oil collecting ring 15 is connected with the motor main shell 11. In this embodiment, the fastening member is preferably a bolt, and the fastening hole is a threaded hole matched with the bolt.

Furthermore, a positioning insertion block 141 is disposed on the first oil collecting ring 14, a positioning insertion groove (not shown) is disposed on the motor main housing 11, and the positioning insertion block 141 is inserted into the positioning groove. The positioning of the first oil collecting ring 14 is realized by the positioning insert block 141 and the positioning slot.

Referring again to fig. 6 and 7, the oil grooves 101 on the oil collecting rings extend along the circumferential direction thereof, and the length of each oil groove 101 is equal to or less than the length of the corresponding oil collecting ring. In addition, a plurality of first oil injection holes 102 are formed in each oil collecting ring along the circumferential direction of the oil collecting ring, and each first oil injection hole 102 is communicated with the corresponding oil containing groove 101.

As shown in fig. 1, the cooling system for the hub motor further includes a cooling oil inlet pipe 2, the cooling oil inlet pipe 2 is disposed outside the motor housing, and the cooling oil inlet pipe 2 is communicated with the first cooling oil inlet and the second cooling oil inlet. Further, this in-wheel motor cooling system still includes oil pump 3 and oil storage pool 4, and oil pump 3 advances pipe 2 through pipeline intercommunication oil storage pool 4 and coolant oil, sets up the oil gallery that the intercommunication held chamber 10 on the motor casing, and the oil gallery passes through the pipeline and communicates in oil storage pool 4.

When the hub motor needs to be cooled, the oil pump 3 works to convey cooling oil in the oil storage tank 4 to the first cooling oil inlet and the second cooling oil inlet through the cooling oil inlet pipe 2, the cooling oil entering from the first cooling oil inlet is divided into two paths through the oil groove 1311, namely flows into the two oil containing grooves 101, and then is sprayed to the stator winding 132 through the first oil spraying hole 102, so that the stator winding 132 is cooled. The cooling oil entering from the second cooling oil inlet enters the seal cavity 20, cools the first bearing 17, then enters the oil channel 161 of the rotating shaft 16 to cool the motor rotor, and then along with the rotation of the rotating shaft 16, the cooling oil in the oil channel 161 is sprayed to the oil injection blocking cavity 30 and the second bearing 18 through the second oil injection hole 162, so that the second bearing 18 is cooled. The cooling oil injected into the accommodation chamber 10 from the first oil injection hole 102 and the second oil injection hole 162 returns to the reservoir 4 through the oil return hole. The above process is repeated to realize the continuous cooling of the hub motor.

In summary, the cooling system for the hub motor provided by the embodiment includes the hub motor 1, the hub motor 1 includes a motor housing, a motor stator 13 and an oil collecting ring, and the motor housing is provided with a first cooling oil inlet; the motor stator 13 is arranged in the motor shell, the motor stator 13 comprises a stator core 131 and a stator winding 132 wound on the stator core 131, and the stator core 131 is provided with an oil passing groove 1311 which is communicated with the first cooling oil inlet and extends along the axial direction of the first cooling oil inlet; the number of the oil collecting rings is two, the two oil collecting rings are arranged in the motor shell and are respectively located on two axial sides of the stator core 131, and the oil collecting rings are provided with an oil containing groove 101 communicated with the oil passing groove 1311 and a first oil injection hole 102 communicated with the oil containing groove 101 and capable of injecting cooling oil to the stator winding 132. Cooling oil can get into motor casing by first cooling oil import, later by in two flourishing oil grooves 101 of oil groove 1311 entering, later sprays to stator winding 132 through first nozzle 102, compares in prior art, can directly cool off stator winding 132, and the cooling effect is good, and can simplify the structure of motor casing, reduces the volume of motor casing.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An in-wheel motor cooling system, characterized by, including in-wheel motor (1), in-wheel motor (1) includes:

the motor shell is provided with a first cooling oil inlet;

the motor stator (13) is arranged in the motor shell, the motor stator (13) comprises a stator core (131) and a stator winding (132) wound on the stator core (131), and an oil passing groove (1311) communicated with the first cooling oil inlet and extending along the axial direction of the first cooling oil inlet is formed in the stator core (131);

the oil collecting rings are arranged in the motor shell and are respectively located on two axial sides of the stator core (131), and the oil collecting rings are provided with oil containing grooves (101) communicated with the oil passing grooves (1311) and first oil spraying holes (102) communicated with the oil containing grooves (101) and capable of spraying cooling oil to the stator windings (132).

2. The in-wheel motor cooling system according to claim 1, characterized in that the motor housing comprises a motor main housing (11) and a motor end cover (12), and a containing cavity (10) for containing the motor stator (13) is enclosed between the motor end cover (12) and the motor main housing (11); the in-wheel motor (1) further comprises:

the motor rotor comprises a rotating shaft (16), and an oil channel (161) is formed in the rotating shaft (16) along the axial direction of the rotating shaft;

the bearing, be equipped with two, two bearings set up respectively in motor main casing body (11) with motor end cover (12), wear to locate two respectively at the both ends of pivot (16) the bearing, motor end cover (12) and its correspond form the intercommunication between the bearing seal chamber (20) of oil duct (161), seted up the intercommunication on motor end cover (12) the second coolant oil import of seal chamber (20), pivot (16) are kept away from the intercommunication is seted up to the one end in seal chamber (20) the second nozzle opening (162) of oil duct (161), second nozzle opening (162) can to set up in on the motor main casing body (11) the bearing sprays the coolant oil.

3. The in-wheel motor cooling system according to claim 2, wherein the motor main housing (11) is provided with an oil injection baffle ring (111) arranged around the rotating shaft (16), an oil injection baffle cavity (30) is formed between the oil injection baffle ring (111) and the corresponding bearing, and the second oil injection hole (162) can inject cooling oil into the oil injection baffle cavity (30) so as to enable the cooling oil to flow to the bearing.

4. The in-wheel motor cooling system according to claim 2, further comprising a cooling oil inlet pipe (2), wherein the cooling oil inlet pipe (2) is arranged outside the motor casing, and the cooling oil inlet pipe (2) is communicated with the first cooling oil inlet and the second cooling oil inlet.

5. The in-wheel motor cooling system according to claim 4, further comprising an oil pump (3) and an oil storage tank (4), wherein the oil pump (3) is communicated with the oil storage tank (4) and the cooling oil inlet pipe (2) through a pipeline, an oil return hole communicated with the accommodating cavity (10) is formed in the motor housing, and the oil return hole is communicated with the oil storage tank (4) through a pipeline.

6. The in-wheel motor cooling system according to claim 1, wherein one of the oil gathering rings abuts against one side of the motor housing in the axial direction of the stator core (131), the other oil gathering ring is provided with a plurality of fixing lugs (151), a fixing table is arranged on the motor housing corresponding to each fixing lug (151), each fixing lug (151) is connected to the corresponding fixing table, and the two oil gathering rings are used for clamping the stator core (131) together.

7. The in-wheel motor cooling system according to claim 6, wherein the fixing lug (151) is provided with a through hole (1511), the fixing table is provided with a fastening hole, and a fastening member can pass through the through hole (1511) and extend into the corresponding fastening hole to connect the fixing lug (151) and the corresponding fixing table.

8. The in-wheel motor cooling system of claim 7, wherein the fasteners are bolts and the fastening holes are threaded holes that mate with the bolts.

9. The in-wheel motor cooling system according to claim 6, wherein a positioning insertion block (141) is arranged on the oil collecting ring abutting against one side of the motor shell in the axial direction of the stator core (131), a positioning insertion groove is arranged on the motor shell, and the positioning insertion block (141) is inserted into the positioning insertion groove.

10. The in-wheel motor cooling system according to claim 1, wherein the oil receiving grooves (101) on the oil collecting rings extend along the circumferential direction of the oil collecting rings, and the length of each oil receiving groove (101) is less than or equal to the length of the corresponding oil collecting ring.