CN211429059U - Motor casing - Google Patents

Abstract

The present application relates to a motor housing. The casing includes a cylindrical base, an inner sleeve, and an outer sleeve. The cylindrical base body forms a first space. The first space is used for accommodating the stator winding. The cylindrical base body is provided with oil spraying holes and oil collecting holes at intervals. The inner sleeve is sleeved outside the cylindrical base body. A cooling water cavity is formed between the inner wall of the inner sleeve and the outer wall of the cylindrical base body. A plurality of axial ribs are arranged on the outer surface of the inner sleeve. And a cooling oil flow passage is formed between every two adjacent axial rib plates. The cooling oil flow channel is convenient for the circumferential distribution of the cooling oil, and the heat exchange efficiency is improved. The outer sleeve is sleeved outside the inner sleeve. An oil spraying cavity and an oil collecting cavity are formed between the outer sleeve and the inner sleeve at intervals. The oil spraying cavity is communicated with an oil outlet and an oil spraying hole of the cooling oil pump. The oil collecting cavity is used for being communicated with an oil inlet and an oil collecting hole of the cooling oil pump. The motor shell realizes the rapid cooling of the stator winding by the combination of water cooling and oil cooling, and the service life of the motor is prolonged.

Description

Motor casing

Technical Field

The application relates to the technical field of automobiles, in particular to a motor shell.

Background

A common vehicle-mounted cooling system takes a water pump as a power source and adopts a water cooling mode. The main heat source of the automotive motor is the stator winding. When current automobile-used motor adopted cooling water to cool down, cooling water was earlier through stator yoke portion and motor housing usually, and the water jacket that transmits the cooling water in the casing again cools down.

The heat transfer path of the vehicle motor is longer, the equivalent thermal resistance is larger, so that the temperature difference between the stator winding and the cooling water is larger, the service life of the motor is shortened, and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a motor housing for improving the service life of the motor.

A motor case includes a cylindrical base body, an inner sleeve, and an outer sleeve. The cylindrical base body can enclose a first space. The first space is used for accommodating a stator winding. The cylindrical base body is provided with oil spraying holes and oil collecting holes at intervals. The inner sleeve is sleeved on the outer side of the cylindrical base body. And a cooling water cavity is formed between the inner wall of the inner sleeve and the outer wall of the cylindrical base body. The cooling water cavity is used for being communicated with a cooling water pump. The inner sleeve includes an inner sleeve outer surface. A plurality of axial ribs are arranged on the outer surface of the inner sleeve. And a cooling oil flow channel is formed between every two adjacent axial rib plates.

The outer sleeve is sleeved on one side, far away from the cylindrical base body, of the inner sleeve. And a spraying oil cavity and an oil collecting cavity which are arranged at intervals are formed between the inner wall of the outer sleeve and the outer surface of the inner sleeve. The oil spraying cavity and the oil collecting cavity are respectively used for accommodating a plurality of cooling oil flow channels. The oil spraying cavity is communicated with an oil outlet of the cooling oil pump and the oil spraying hole. The oil collecting cavity is used for being communicated with an oil inlet of the cooling oil pump and the oil collecting hole.

In one embodiment, the inner sleeve outer surface is axially spaced apart from the first set of axial ribs and the second set of axial ribs. The first axial rib group and the second axial rib group respectively include a plurality of the axial ribs. A plurality of the axial rib arrays of the first axial rib group are distributed. A plurality of the axial ribs of the second axial rib group are distributed in an array.

In one embodiment, the cylindrical base includes a first cylindrical base end face and a cylindrical base outer surface connected to the first cylindrical base end face. And the outer surface of the cylindrical base body is provided with a circumferential groove. The bottom of the annular groove is provided with a plurality of first rib plates. And a cooling water flow channel is formed between every two adjacent first ribbed plates. The cooling water flow passage is used for being communicated with the cooling water pump.

In one embodiment, the first rib is an annular rib structure. Each annular rib plate structure is provided with an opening.

In one embodiment, the first rib is a helical annular rib structure.

In one embodiment, the end surface of the first cylindrical base body is provided with a cooling water inlet, a cooling water outlet, a cooling oil inlet and a cooling oil outlet at intervals. And the cooling water inlet is communicated with the water outlet of the cooling water pump and the cooling water flow channel. And the cooling water outlet is communicated with the water inlet of the cooling water pump and the cooling water flow passage. And the cooling oil inlet is communicated with the oil spraying cavity and the oil outlet of the cooling oil pump. The cooling oil outlet is used for being communicated with the oil collecting cavity and the oil inlet of the cooling oil pump.

In one embodiment, the inner sleeve outer surface is circumferentially spaced apart from a first spaced apart land and a second spaced apart land. The surfaces, far away from the outer surface of the inner sleeve, of the first separating table and the second separating table are used for being attached to the inner wall of the outer sleeve, and the oil spraying cavity and the oil collecting cavity are formed.

In one embodiment, the outer sleeve includes an outer sleeve inner surface. And two side walls of the annular groove are respectively and oppositely provided with a positioning groove. The outer sleeve is clamped in the positioning groove. The lateral wall interval of constant head tank sets up two first bosss. The first separating table and the second separating table are respectively arranged in one-to-one correspondence with the two first bosses. The inner sleeve is arranged between the two opposite first bosses. The surface of the first boss, which is far away from the bottom of the annular groove, is used for being attached to the inner surface of the outer sleeve. And an oil spraying groove and an oil collecting groove are formed at intervals among the side wall of the annular groove, the end surface of the inner sleeve and the inner surface of the outer sleeve. The bottom of the oil sprinkling groove is provided with the oil sprinkling hole. The oil collecting hole is formed at the bottom of the oil collecting tank. And the cooling oil flow channel is opposite to the oil drenching groove and is communicated with the oil drenching groove. And the cooling oil flow channel opposite to the oil collecting groove is communicated with the oil collecting groove.

In one embodiment, the circumferential distribution angles of the oil spraying cavity and the oil collecting cavity are equal.

In one embodiment, the number of the oil spraying holes is multiple, the oil spraying holes are distributed annularly, and the annular distribution angle of the oil spraying holes is smaller than 180 degrees.

In one embodiment, the plurality of oil spraying holes are arranged close to two end faces of the cylindrical base body.

The motor case comprises a cylindrical base body, an inner sleeve and an outer sleeve. The cylindrical base body can enclose a first space. The first space is used for accommodating a stator winding. The cylindrical base body is provided with oil spraying holes and oil collecting holes at intervals. The inner sleeve is sleeved on the outer side of the cylindrical base body. And a cooling water cavity is formed between the inner wall of the inner sleeve and the outer wall of the cylindrical base body. The cooling water cavity is used for being communicated with a cooling water pump. The inner sleeve includes an inner sleeve outer surface. A plurality of axial ribs are arranged on the outer surface of the inner sleeve. The outer sleeve is sleeved on one side, far away from the cylindrical base body, of the inner sleeve. And a spraying oil cavity and an oil collecting cavity which are arranged at intervals are formed between the inner wall of the outer sleeve and the outer surface of the inner sleeve. The oil spraying cavity and the oil collecting cavity respectively comprise a plurality of cooling oil flow channels. The oil spraying cavity is communicated with an oil outlet of the cooling oil pump and the oil spraying hole. The oil collecting cavity is used for being communicated with an oil inlet of the cooling oil pump and the oil collecting hole.

The motor shell constructs double cooling circulation of cooling oil circulation and cooling water circulation through the cylindrical base body, the inner sleeve and the outer sleeve. The heat of the stator windings is transferred to the cooling oil by the cooling oil circulation. A plurality of axial ribs are arranged on the outer surface of the inner sleeve. And a cooling oil flow channel is formed between every two adjacent axial rib plates. The cooling oil flow channel is convenient for the circumferential distribution of the cooling oil, and the heat exchange efficiency is improved. The large-area heat exchange between the cooling oil and the cooling water leads the heat of the cooling oil to be taken away by the cooling water. The cooling water cavity is closer to the stator relative to the oil spraying cavity and the oil collecting cavity. The cooling water also serves to absorb heat from the stator core, further shortening the heat transfer path. The motor shell improves the cooling capacity of the motor through water-oil double cooling circulation in the motor shell, and reduces the temperature of a stator winding and the temperature of an iron core of the motor running at rated power and peak power. Furthermore, the motor casing reduces the temperature of the rotor permanent magnet, prevents the permanent magnet from demagnetizing at high temperature, and prolongs the service life and the power of the motor.

Drawings

Fig. 1 is a schematic structural diagram of the motor housing provided in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view taken along section A-A of the motor housing provided in an embodiment of the present application;

FIG. 3 is a schematic structural view of the cylindrical substrate provided in an embodiment of the present application;

FIG. 4 is a schematic structural view of the inner sleeve provided in an embodiment of the present application;

FIG. 5 is a schematic structural view of the outer sleeve provided in an embodiment of the present application;

FIG. 6 is a distribution diagram of the oil pouring holes and the oil collecting holes provided in an embodiment of the present application;

FIG. 7 is a side view of the cylindrical base with the inner sleeve attached thereto as provided in one embodiment of the present application;

FIG. 8 is a perspective view of the cylindrical base with the inner sleeve attached thereto as provided in one embodiment of the present application;

FIG. 9 is a cross-sectional view of the cooling water inlet and the cooling water outlet provided in an embodiment of the present application;

FIG. 10 is an enlarged view of portion B of the cooling water inlet and cooling oil outlet provided in an embodiment of the present application;

FIG. 11 is a cross-sectional view at the cooling oil inlet provided in an embodiment of the present application;

FIG. 12 is an enlarged view of a portion C at the cooling oil inlet provided in an embodiment of the present application.

Reference numerals:

motor housing 10

Cooling water inlet 101

Cooling water outlet 102

Cooling oil inlet 103

Cooling oil outlet 104

First axial rib group 110

Second axial rib group 120

Cylindrical base body 20

First space 201

Oil spraying hole 202

Oil gathering hole 203

Opening 204

First cylindrical base end face 210

Cylindrical base outer surface 220

Circumferential groove 230

First rib 240

Cooling water flow passage 250

Positioning groove 260

First boss 270

Oil sprinkling groove 280

Oil sump 290

Inner sleeve 30

End face 300

Cooling water cavity 301

Inner sleeve outer surface 310

First separating table 311

Second partition table 312

Axial rib 320

Oil distribution port 321

Cooling oil flow passage 330

Outer sleeve 40

Shower oil cavity 401

Oil collecting cavity 402

Outer sleeve inner surface 410

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

The numbering of the components as such, e.g., "first", "second", etc., is used herein for the purpose of describing the objects only, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, 2, 3, 4 and 5, an embodiment of the present application provides a motor housing 10 including a cylindrical base 20, an inner sleeve 30 and an outer sleeve 40. The cylindrical base 20 can form a first space 201. The first space 201 is used for receiving a stator winding. The cylindrical base 20 is provided with oil sprinkling holes 202 and oil collecting holes 203 at intervals. The inner sleeve 30 is sleeved outside the cylindrical base 20. A cooling water chamber 301 is formed between the inner wall of the inner sleeve 30 and the outer wall of the cylindrical base body 20. The cooling water cavity 301 is used for communicating with a cooling water pump. The inner sleeve 30 includes an inner sleeve outer surface 310. The inner sleeve outer surface 310 is provided with a plurality of axial ribs 320. A cooling oil flow passage 330 is formed between two adjacent axial ribs 320.

The outer sleeve 40 is sleeved on one side of the inner sleeve 30 far away from the cylindrical base body 20. A spraying oil cavity 401 and an oil collecting cavity 402 which are arranged at intervals are formed between the inner wall of the outer sleeve 40 and the outer surface 310 of the inner sleeve. The oil sprinkling chamber 401 and the oil collecting chamber 402 respectively accommodate a plurality of cooling oil flow channels 330. The oil spraying cavity 401 is used for being communicated with an oil outlet of the cooling oil pump and the oil spraying hole 202. The oil collecting cavity 402 is used for communicating with an oil inlet of a cooling oil pump and the oil collecting hole 203.

The motor housing 10 is disposed outside the stator, and the stator is disposed outside the rotor. The stator includes a stator winding and a stator core. The stator core includes a stator core yoke portion and a stator core tooth portion. The stator core tooth part and the stator winding exist at intervals and are located in a ring structure with the same diameter. The stator core yoke portion is sleeved outside the stator core tooth portion and the stator winding.

In the motor housing 10 provided by the embodiment of the present application, a cooling water cavity 301 is formed between an inner wall of the inner sleeve 30 and an outer wall of the base body 20. The cooling water cavity 301 is used for cooling the stator. The cylindrical base 20 can form a first space 201. The first space 201 is used for receiving a stator winding. The cooling water cavity 301 is close to the yoke part of the stator core, and the yoke part of the stator core is cooled through heat transfer.

Besides, a spraying oil chamber 401 and an oil collecting chamber 402 are formed between the outer sleeve 40 and the inner sleeve 30 at intervals. The oil spraying cavity 401 is used for being communicated with an oil outlet of the cooling oil pump and the oil spraying hole 202. The oil collecting cavity 402 is used for communicating with an oil inlet of a cooling oil pump and the oil collecting hole 203. The oil spraying hole 202 is used for guiding and dripping cooling oil to the stator end winding, and the oil collecting hole 203 is used for collecting the cooling oil. The oil spraying hole 202 and the oil collecting hole 203 realize oil cooling of the stator end winding, and the cooling rate of the stator winding is further improved.

The motor casing 10 constructs a dual cooling cycle of a cooling oil circulation and a cooling water circulation through the cylindrical base 20, the inner sleeve 30, and the outer sleeve 40. The inner sleeve outer surface 310 is provided with a plurality of axial ribs 320. A cooling oil flow passage 330 is formed between two adjacent axial ribs 320. The cooling oil flow channel 330 facilitates circumferential distribution of cooling oil, and improves heat exchange efficiency. The cooling oil circulation achieves a faster transfer of heat from the stator windings to the cooling oil. The large-area heat exchange between the cooling oil and the cooling water enables the heat of the cooling oil to be transferred into the cooling water.

The cooling water cavity 301 is closer to the stator than the oil sprinkling cavity 401 and the oil collecting cavity 402. The cooling water also serves to absorb heat from the yoke portion of the stator core, shortening the heat transfer path. The motor shell 10 improves the cooling capacity of the motor through the water-oil double cooling circulation in the motor shell, and reduces the temperature of a stator winding and the temperature of an iron core of the motor running at rated power and peak power. Furthermore, the motor casing 10 can also reduce the temperature of the rotor permanent magnet, prevent the permanent magnet from demagnetizing at high temperature, and prolong the service life and power of the motor.

The motor shell 10 is provided with the cooling water cavity 301, the oil spraying cavity 401 and the oil collecting cavity 402 through a double-layer sleeve structure to form an oil-water heat exchanger, so that the shell space can be fully utilized, and the motor shell has the characteristics of high integration level and high compactness.

A common vehicle-mounted cooling system takes a water pump as a power source and adopts a water cooling mode. The cooling water cavity 301 of the motor housing 10 is disposed around the stator winding. The cooling water cavity 301 is a main cooling cold source, and a water pump of the vehicle-mounted system is fully utilized to realize cooling of the motor.

In the above embodiment, the operation mechanism of the motor housing 10 is as follows:

the low-temperature water is pumped to the cooling water cavity 301 by a water pump. The cooling water cavity 301 cools down the yoke portion of the stator core in the first space 201 through heat transfer, and cools down the oil in the oil spraying cavity 401 and the oil collecting cavity 402. The oil in the oil spraying cavity 401 drops to the stator end winding through the oil spraying hole 202 to cool the stator end winding. The oil in the first space 201 flows from the oil collecting hole 203 to the oil collecting cavity 402. The cooling oil absorbing heat fills the oil collecting cavity 402 through the cooling oil flow passage 330. The cooling oil flow channel 330 facilitates circumferential distribution of cooling oil, and improves heat exchange efficiency.

The cooling oil pump is used for providing circulating power for the cooling oil.

Referring to fig. 6, in one embodiment, the oil spraying holes 202 and the oil collecting holes 203 are through holes formed along the radial direction of the cylindrical base 20. The oil sprinkling holes 202 and the oil collecting holes 203 are arranged close to the end surface of the cylindrical base body 20. The cooling oil flows through the oil spraying hole 202, and the end part of the stator winding is cooled. The cooling oil at the end part of the stator winding also plays a role in lubricating and cooling the bearing of the output shaft of the motor.

In one embodiment, the circumferential distribution angles of the oil spraying cavity 401 and the oil collecting cavity 402 are equal.

In one embodiment, the number of the oil spraying holes 202 is multiple, the oil spraying holes 202 are distributed circumferentially, and the circumferential distribution angle of the oil spraying holes 202 is less than 180 °.

In one embodiment, the plurality of oil pouring holes 202 are disposed near both end surfaces of the cylindrical base body 20.

In one embodiment, the diameter of the oil sprinkling hole 202 is smaller than that of the oil collecting hole 203, so that negative pressure is formed near the oil collecting hole 203. The absolute pressure of the oil collecting hole 203 is smaller than that of air. The air in the first space 201 pushes the oil at the lower part of the motor into the oil collecting hole 203, and then into the oil collecting cavity 401, and enters the cooling oil circulation.

Referring to both figures 4 and 7, in one embodiment, the inner sleeve outer surface 310 is axially spaced from the first set of axial ribs 110 and the second set of axial ribs 120. The first axial rib group 110 and the second axial rib group 120 each include a plurality of the axial ribs 320. A plurality of the axial ribs 320 of the first axial rib group 110 are arranged in an array. A plurality of the axial ribs 320 of the second axial rib group 120 are arranged in an array.

The gap between the first axial rib group 110 and the second axial rib group 120 forms a primary flow channel. The cooling oil is distributed in the plurality of cooling oil flow channels 330 through the main flow channel. The first axial rib plate group 110 and the second axial rib plate group 120 can play a role in drainage and radial support, so that the mechanical strength of the flow channel is improved.

Referring to fig. 3 and 8 together, in one embodiment, the cylindrical base 20 includes a first cylindrical base end surface 210 and a cylindrical base outer surface 220 connected to the first cylindrical base end surface 210. The outer surface 220 of the cylindrical base body is provided with a circumferential groove 230. A plurality of first ribs 240 are provided at the bottom of the circumferential groove 230. A cooling water flow passage 250 is formed between two adjacent first ribs 240. The cooling water flow passage 250 is used to communicate with the cooling water pump. The first rib plates 240 can play a role in drainage and radial support, so that the mechanical strength of the flow channel is improved.

In one embodiment, the first ribs 240 are annular rib structures. Each annular rib structure is provided with an opening 204 to allow cooling water to fill the cooling water cavity 301.

In one embodiment, the first rib 240 is a spiral annular rib structure, which facilitates diversion of cooling water and improves heat exchange efficiency.

In one embodiment, the first cylindrical base end surface 210 is provided with a cooling water inlet 101, a cooling water outlet 102, a cooling oil inlet 103 and a cooling oil outlet 104 at intervals. The cooling water inlet 101 is used for communicating with the water outlet of the cooling water pump and the cooling water flow passage 250. The cooling water outlet 102 is used to communicate with the water inlet of the cooling water pump and the cooling water flow passage 250. The cooling oil inlet 103 is used for being communicated with the oil spraying cavity 401 and an oil outlet of the cooling oil pump. The cooling oil outlet 104 is used for communicating with the oil collecting cavity 402 and an oil inlet of the cooling oil pump.

In one embodiment, the cooling water inlet 101, the cooling water outlet 102, the cooling oil inlet 103, and the cooling oil outlet 104 are all one.

The number of the cooling water inlets 101, the cooling water outlets 102, the cooling oil inlets 103, and the cooling oil outlets 104 may be set according to the use requirement.

In one embodiment, the inner sleeve outer surface 310 is circumferentially spaced apart by a first spacer land 311 and a second spacer land 312. The surfaces of the first partition table 311 and the second partition table 312 far away from the outer surface 310 of the inner sleeve are used for being attached to the inner wall of the outer sleeve 40, and the oil spraying cavity 401 and the oil collecting cavity 402 are formed.

Referring also to fig. 9, 10, 11 and 12, in one embodiment, the outer sleeve 40 includes an outer sleeve inner surface 410. The two sidewalls of the circumferential groove 230 are respectively opposite to each other to form a positioning groove 260. The outer sleeve 40 is clamped in the positioning slot 260. The side wall of the positioning groove 260 is provided with two first bosses 270 at intervals. The first separating table 311 and the second separating table 312 are respectively arranged corresponding to the two first bosses 270. The inner sleeve 30 is disposed between two opposing first bosses 270.

The surface of the first boss 270 away from the bottom of the circumferential groove 230 is adapted to engage the outer sleeve inner surface 410. Spaced oil sumps 280 and oil sumps 290 are formed between the side walls of the circumferential groove 230, the end surface of the inner sleeve 30 and the inner surface 410 of the outer sleeve. The oil sprinkling hole 202 is formed at the bottom of the oil sprinkling groove 280. The oil collecting hole 203 is formed at the bottom of the oil collecting groove 290. The cooling oil flow passage 330 disposed opposite to the oil drip groove 280 communicates with the oil drip groove 280. The cooling oil flow passage 330 disposed opposite to the oil sump 290 communicates with the oil sump 290.

The cooling water is circulated externally and driven by a water pump outside the motor. The external water pump drives the cooling water to flow into the cooling water chamber 301 from the cooling water inlet 103 of the cylindrical base 20. Due to the action of the first rib plates 240, the cooling water flows along the axial and circumferential flow channels to fill the cooling water cavity 301 in the machine shell. The cooling water and the cooling oil perform large-area heat exchange, and then the cooling water flows out from the cooling water outlet 102 to complete the external circulation of the cooling water. The cooling water absorbs the heat transmitted from the yoke part of the stator core at the same time, and the heat dissipation capacity of the motor is further improved.

The cooling oil is circulated externally and driven by an external oil pump of the motor to drive the cooling oil to enter the oil spraying cavity 401 from the cooling oil inlet 103. Then, the cooling oil enters the oil drip tank 280 along the cooling oil flow channel 330 corresponding to the oil drip tank 280. The cooling oil is poured out from the oil pouring groove 280 to the end of the motor winding. Under the action of gravity, the cooling oil flows to the lower part of the first space 201 again, enters the oil collecting cavity 402 through the oil collecting hole 203, and finally flows to the cooling oil outlet 104, so that the internal circulation of the cooling oil is completed.

The shape of the radial ribs 320 and the first ribs 240 in this application is not limited.

In order to ensure the mechanical strength and the sealing property of the motor housing 10. In the machining, the inner sleeve 30 and the outer sleeve 40 are respectively machined in two half circumferences. The assembly process is mainly divided into two steps. The first step is to weld the inner sleeve 30. Two inner sleeves 30 of half circumference are fitted over the cylindrical base body 20. The end faces of the two half-circumference inner sleeves 30 are welded annularly to the side wall edges of the circumferential groove 230. Two half-circumference inner sleeves 30 are butt welded. The second step is to weld the outer sleeve 40, and to sleeve the two half-circumference outer sleeves 40 on the inner sleeve 30. Two half-circumference outer sleeves 40 are welded annularly to the side walls of the positioning slots 260. Two half-circumference outer sleeves 40 are butt welded.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-described examples merely represent several embodiments of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. An electric machine housing, comprising:

the stator winding device comprises a cylindrical base body (20), a first space (201) is formed by enclosing, the first space (201) is used for containing a stator winding, and oil spraying holes (202) and oil collecting holes (203) are formed in the cylindrical base body (20) at intervals;

the cooling water pump is characterized by comprising an inner sleeve (30), the inner sleeve (30) is sleeved on the outer side of the cylindrical base body (20), a cooling water cavity (301) is formed between the inner wall of the inner sleeve (30) and the outer wall of the cylindrical base body (20), the cooling water cavity (301) is used for being communicated with a cooling water pump, the inner sleeve (30) comprises an inner sleeve outer surface (310), a plurality of axial rib plates (320) are arranged on the inner sleeve outer surface (310), and a cooling oil flow channel (330) is formed between every two adjacent axial rib plates (320);

outer sleeve (40), outer sleeve (40) cover is located inner sleeve (30) is kept away from one side of tube-shape base member (20), the inner wall of outer sleeve (40) with form that the interval sets up between inner sleeve surface (310) drench oil chamber (401) and oil collecting chamber (402), drench oil chamber (401) with oil collecting chamber (402) accomodate a plurality ofly respectively cooling oil runner (330), drench oil chamber (401) be used for with the oil-out of cooling oil pump with drench oil hole (202) intercommunication, oil collecting chamber (402) be used for with the oil inlet of cooling oil pump with oil collecting hole (203) intercommunication.

2. The motor housing of claim 1, wherein a first axial rib group (110) and a second axial rib group (120) are axially spaced from the inner sleeve outer surface (310), the first axial rib group (110) and the second axial rib group (120) each include a plurality of the axial ribs (320), the plurality of the axial ribs (320) of the first axial rib group (110) are arranged in an array, and the plurality of the axial ribs (320) of the second axial rib group (120) are arranged in an array.

3. The motor casing according to claim 2, wherein the cylindrical base body (20) comprises a first cylindrical base body end surface (210) and a cylindrical base body outer surface (220) connected with the first cylindrical base body end surface (210), the cylindrical base body outer surface (220) is provided with a circumferential groove (230), a plurality of first ribs (240) are arranged at the bottom of the circumferential groove (230), a cooling water flow passage (250) is formed between two adjacent first ribs (240), and the cooling water flow passage (250) is used for communicating with the cooling water pump.

4. The machine housing according to claim 3, characterized in that the first ribs (240) are annular rib structures, each annular rib structure being provided with an opening (204).

5. The motor case of claim 4, wherein the first ribs (240) are helical annular rib structures.

6. The motor casing of claim 3, wherein the first cylindrical base end surface (210) is provided with a cooling water inlet (101), a cooling water outlet (102), a cooling oil inlet (103) and a cooling oil outlet (104) at intervals, the cooling water inlet (101) is used for being communicated with a water outlet of the cooling water pump and the cooling water flow passage (250), the cooling water outlet (102) is used for being communicated with a water inlet of the cooling water pump and the cooling water flow passage (250), the cooling oil inlet (103) is used for being communicated with the oil spraying cavity (401) and an oil outlet of the cooling oil pump, and the cooling oil outlet (104) is used for being communicated with the oil collecting cavity (402) and an oil inlet of the cooling oil pump.

7. The motor casing of claim 3, wherein the inner sleeve outer surface (310) is circumferentially spaced apart by a first divider land (311) and a second divider land (312), surfaces of the first divider land (311) and the second divider land (312) distal from the inner sleeve outer surface (310) for engaging an inner wall of the outer sleeve (40) and forming the oil drain cavity (401) and the oil collection cavity (402).

8. The motor casing according to claim 7, wherein the outer sleeve (40) comprises an outer sleeve inner surface (410), two side walls of the circumferential groove (230) are respectively provided with a positioning groove (260) oppositely, the outer sleeve (40) is clamped in the positioning groove (260), two first bosses (270) are arranged on the side walls of the positioning groove (260) at intervals, the first separating table (311) and the second separating table (312) are respectively arranged corresponding to the two first bosses (270) one by one, the inner sleeve (30) is arranged between the two opposite first bosses (270), the surface of the first boss (270) far away from the bottom of the circumferential groove (230) is used for being attached to the outer sleeve inner surface (410), and spaced oil spraying grooves (280) and oil collecting grooves (290) are formed among the side walls of the circumferential groove (230), the end surface of the inner sleeve (30) and the outer sleeve inner surface (410), the oil spraying hole (202) is formed in the bottom of the oil spraying groove (280), the oil collecting hole (203) is formed in the bottom of the oil collecting groove (290), the cooling oil flow channel (330) opposite to the oil spraying groove (280) is communicated with the oil spraying groove (280), and the cooling oil flow channel (330) opposite to the oil collecting groove (290) is communicated with the oil collecting groove (290).

9. The motor casing according to claim 1, wherein the circumferential distribution angles of the oil spraying cavity (401) and the oil collecting cavity (402) are equal.

10. The motor casing according to claim 1, wherein the number of the oil spraying holes (202) is plural, the plurality of oil spraying holes (202) are circumferentially distributed, and the circumferential distribution angle of the plurality of oil spraying holes (202) is less than 180 °.

11. The motor case of claim 1, wherein a plurality of the oil spraying holes (202) are provided near both end surfaces of the cylindrical base body (20).

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