CN209860741U - Motor assembly and vehicle - Google Patents

Abstract

The utility model discloses a motor assembly and vehicle, motor assembly includes: a motor housing, in which a motor installation space accommodating a stator and a rotor is provided; an oil-cooled cooling system, the oil-cooled cooling system comprising: and the spraying device is arranged on the motor shell and is suitable for spraying cooling oil to the stator and the rotor. According to the utility model discloses a motor assembly adopts the cold cooling system of oil, and cooling efficiency is high, can reduce motor assembly's volume simultaneously, makes motor assembly have higher power.

Description

Motor assembly and vehicle

Technical Field

The utility model belongs to the technical field of the car and specifically relates to a motor assembly and vehicle are related to.

Background

In recent years, the motor design and manufacturing technology is developed very fast, the working efficiency of the motor is improved, the size of the motor is reduced, the motor is miniaturized and centralized, the lightweight design concept is gradually strengthened, the aims are achieved, the efficiency of the motor body is improved, meanwhile, the heat generation quantity generated when the motor works is strictly controlled, and currently, the main heat dissipation mode of the motor is a self-cooling system, an air-cooling system and a water-cooling system. The cooling effect is different. And each has drawbacks.

1. Water cooling system, most motors in the correlation technique use water cooling structure, and water cooling structure's casing comprises shell and inner shell, and the centre is equipped with the water course, so the wall thickness of casing is three layer construction: the outer shell, the water channel and the inner shell are thick in wall thickness, the outer diameter of the manufactured motor is large, and the effective utilization space of the stator and the rotor is small.

2. In the related art, the cooling mode of the water cooling structure is that the stator is cooled by cooling the casing and then by the heat conduction action of the casing, and the stator winding is finally cooled. The winding and the machine casing usually have a temperature difference of 10-20 ℃, which is unfavorable for the temperature control of the motor and influences the performance of the motor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a motor assembly, this motor assembly adopt oil cooling system, and cooling efficiency is high, can reduce motor assembly's volume simultaneously.

The utility model discloses still provide a vehicle that has above-mentioned motor assembly.

According to the utility model discloses a motor assembly includes: a motor housing, in which a motor installation space accommodating a stator and a rotor is provided; an oil-cooled cooling system, the oil-cooled cooling system comprising: and the spraying device is arranged on the motor shell and is suitable for spraying cooling oil to the stator and the rotor.

According to the motor assembly of this application, through set up spray set on the motor casing, spray set sprays the cooling oil to stator and rotor, makes the direct stator and the rotor that cool off to in the motor assembly of cooling oil, and the cooling efficiency of motor assembly is high, and the wall thickness of this motor assembly's casing is thin, and is small, and the temperature control of motor assembly is more accurate.

According to the utility model discloses an embodiment, spray set constructs to set up nozzle opening on the motor casing.

According to the utility model discloses an embodiment, the nozzle opening is multiunit and every group the nozzle opening with correspond the winding of rotor is just right.

According to an embodiment of the present invention, the oil injection hole is disposed at the top of the motor casing; the oil cooling system further comprises: the oil inlet of the oil pump is connected with the bottom of the motor installation space, the oil outlet of the oil pump is connected with one end of the oil spray hole, and the other end of the oil spray hole is connected with the top of the motor installation space.

According to the utility model discloses an embodiment, oil cooling system still includes: bottom oil tank and heat exchanger, the bottom oil tank includes: the oil inlet of the hot oil tank is connected with the bottom of the motor installation space, the oil outlet of the cold oil tank is connected with the oil inlet of the oil pump, the oil inlet of the heat exchanger is connected with the oil outlet of the hot oil tank, and the oil outlet of the heat exchanger is connected with the oil inlet of the cold oil tank.

According to the utility model discloses an embodiment, the hot-oil tank includes: the oil inlet of the first hot oil tank is connected with the bottom of the motor installation space, the oil outlet of the second hot oil tank is connected with the oil inlet of the heat exchanger, the oil outlet of the first hot oil tank is connected with the oil inlet of the second hot oil tank, and a filter screen is arranged between the oil outlet of the first hot oil tank and the oil inlet of the second hot oil tank.

According to the utility model discloses an embodiment, oil cooling system still includes: the oil inlet of the top oil tank is connected with the oil outlet of the oil pump, and the oil outlet of the top oil tank is connected with one end of the oil injection hole.

According to the utility model discloses an embodiment, top oil tank includes: the box and detachably set up case lid on the box, the box with motor casing integrated into one piece.

According to the utility model discloses an embodiment, be provided with in the motor casing a plurality of stators and a plurality of with stator complex rotor.

The vehicle according to the present invention is briefly described below.

According to the utility model discloses a vehicle, including above-mentioned motor assembly, because according to the utility model discloses a vehicle is provided with the motor assembly of above-mentioned embodiment, consequently the motor assembly's of this vehicle cooling efficiency is high, motor assembly's is small, and the space occupies for a short time, and motor assembly reliability is high, and stability is good.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an electric machine assembly according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an electric machine assembly employing a water-cooled cooling system in accordance with an embodiment of the present invention;

fig. 3 is a cross-sectional view of an electric machine assembly employing an oil-cooled cooling system in accordance with an embodiment of the present invention;

fig. 4 is a schematic diagram of a cooling oil circulation in an electric machine assembly employing an oil-cooled cooling system according to an embodiment of the present invention;

fig. 5 is a top view of an electric machine assembly employing an oil-cooled cooling system in accordance with an embodiment of the present invention;

FIG. 6 is a cross-sectional view of section A-A of FIG. 5;

FIG. 7 is a cross-sectional view of section B-B of FIG. 6;

fig. 8 is a schematic view of a vehicle according to an embodiment of the present invention.

Reference numerals:

in the case of the vehicle 1000, the vehicle,

the motor assembly (11) is provided with a motor,

double motor housing 110, motor housing 110a, outer housing 1101, baffle 1102, first bearing mount 1103, second bearing mount 1104,

left end cap 1105, right end cap 1106, third bearing mount 1107, fourth bearing mount 1108, inner housing 1109,

a first motor 111, a first stator 1111, a first rotor 1112, a first motor shaft 1113, a first motor bearing 1114, a third motor bearing 1115,

second motor 112, second stator 1121, second rotor 1122, second motor shaft 1123, second motor bearing 1124, fourth motor bearing 1125,

the oil-cooled cooling system 12 is provided with,

oil spray hole 121, oil pump 122, oil inlet 1221, oil outlet 1222,

a bottom oil tank 123, a first hot oil tank 1231, a second hot oil tank 1232, a cold oil tank 1233,

a heat exchanger 124, a water inlet pipe 1241, a water outlet pipe 1242, a top oil tank 125, a tank cover 1251,

vent valve 1201, filter screen 1202, temperature sensor 1203,

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

An electric motor assembly 11 according to an embodiment of the present invention is described below with reference to fig. 1 to 8.

According to the utility model discloses a motor assembly 11 includes a plurality of motors, and every motor includes motor casing 110a and sets up rotor and the stator in motor casing 110a, and wherein, a plurality of motor casings 110a integrated into one piece are with the structure as total casing.

The stators and the rotors of the motors are all accommodated in the general shell, the motor shafts of different motors can output at different powers and rotating speeds simultaneously, the motors do not interfere with each other, each motor can work independently, the motor assembly 11 constructs the motor shells 110a of the motors into an integrally formed general shell, and compared with the scheme that each motor is provided with a respective independent shell, and each motor is fixed with each other, the cost of the motor assembly 11 is greatly reduced; simultaneously motor assembly 11 of this application has still improved the integrated level of motor assembly 11 that has a plurality of motors, makes a plurality of motors integrated in same casing, and this motor assembly 11's assembly is also easier simultaneously, and arranging between a plurality of motors can be decided by the shape, the structure of total casing, for example, each other becomes the angle setting between the motor shaft of a plurality of motors, or parallel arrangement before the motor shaft of a plurality of motors etc. the structure of total casing is relevant with the form of arranging of every motor.

According to the utility model discloses a motor assembly 11 has a plurality of motors, and all be provided with stator and rotor in every motor, the stator and the rotor of every motor all set up in motor casing 110a, and motor casing 110a of a plurality of motors constructs integrated into one piece's total casing, the stator and the rotor of every motor all set up in total casing, every motor in motor assembly 11 all can the autonomous working and do not interfere each other, motor casing 110a is the integrated into one piece structure, greatly reduced motor assembly 11's cost.

According to the utility model discloses an embodiment, a plurality of motors include: a first motor 111 at the left side and a second motor 112 at the right side, and a motor case 110a of the first motor 111 and a motor case 110a of the second motor 112 are integrally molded to configure a dual motor case 110.

According to the scheme of the double motor casing 110 of the present application, compared with the scheme of the first motor casing and the second motor casing separately arranged, the double motor casing 110 of the present application can more fully utilize the space, and reduce the occupied space of the motor assembly 11, the double motor casing 110 can be used for accommodating the first stator 1111 and the first rotor 1112 of the first motor 111, the second stator 1121 and the second rotor 1122 of the second motor 112, and the double motor casing 110 can be used as the casing of the first motor 111 and the second motor 112 at the same time, so that the arrangement of the first motor 111 and the second motor 112 is more compact, and meanwhile, the connecting members of the first motor 111 and the second motor 112 are also reduced, so that the arrangement of the motor assembly 11 of the present application is more reasonable, and the structure of the motor assembly 11 is more compact.

According to the motor assembly 11 of the present application, the first motor 111 and the second motor 112 are both disposed within the dual motor case 110, however, the first motor 111 and the second motor 112 both work independently, and there is no connection between the output shaft of the first motor 111 and the output shaft of the second motor 112, that is, the first motor 111 and the second motor 112 can work independently, when the motor assembly 11 of the present application is applied to a new energy vehicle, and the first motor 111 and the second motor 112 are used as power sources for the left and right wheels, a differential will not be required in the vehicle, in the turning process of the vehicle, the left and right wheels of the vehicle can smoothly turn by controlling the different rotating speeds of the first motor 111 and the second motor 112, the motor assembly 11 of the application can greatly simplify the power transmission system of the vehicle, and the arrangement of a differential is omitted, so that the arrangement of the power transmission system is simpler.

According to the motor assembly 11 of the present application, the motor casing 110a of the first motor 111 and the motor casing 110a of the second motor 112 are constructed as the double motor casing 110 which is integrally formed, so that the arrangement of the first motor 111 and the second motor 112 is more compact, the volume of the motor assembly 11 is reduced, the cost of the motor assembly 11 is reduced, meanwhile, the arrangement and connection relationship between the first motor 111 and the second motor 112 are simplified, the work of the first motor 111 and the second motor 112 does not affect each other, and the integration level of the motor assembly 11 is high.

The structure of the motor assembly 11 according to the present application is described in detail below.

As shown in fig. 1, 2 and 3, in the motor assembly 11 according to the present invention, the dual motor casing 110 includes an outer casing 1101 and a baffle 1102, wherein the outer casing 1101 defines a motor installation space, and the baffle 1102 is disposed in the motor installation space to divide the motor installation space into a first motor installation space and a second motor installation space; wherein the rotor and the stator of the first motor 111 are disposed in the first motor installation space, and the rotor and the stator of the second motor 112 are disposed in the second installation space.

Specifically, a first stator 1111 and a first rotor 1112 are provided in the first motor installation space, the first stator 1111 is provided at the outer circumference of the first motor installation space, the first rotor 1112 is arranged in the axial direction of the first motor installation space and extends to the left side, the first rotor 1112 is connected to a first motor shaft 1113, and the left end of the first motor shaft 1113 may extend out of the double motor housing 110 and be connected to a reducer or other power transmission device to output power; second stator 1121 and second rotor 1122 are provided in the second motor installation space, second stator 1121 is provided at the outer circumference of the second installation space, second rotor 1122 is arranged in the axial direction in the second installation space and extends to the right side, second rotor 1122 is connected to second motor shaft 1123, and the right end of second motor shaft 1123 may protrude out of double motor housing 110 and be connected to a reducer or other power transmission device to output power.

Through setting up the motor installation space in outer casing 1101, make double motor shell 110 can set up first motor 111 and second motor 112 simultaneously, first motor 111 can coaxial setting with second motor 112, has simplified first motor 111 and second motor 112's arrangement, has improved motor assembly 11's space utilization, has guaranteed that first motor 111 and second motor 112's installation is reliable.

According to an embodiment of the present invention, the outer housing 1101 further includes a body portion, a left end cover 1105 and a right end cover 1106, both ends open to form a first opening and a second opening, the left end cover 1105 is disposed on the left side of the body portion to close the first opening, and the right end cover 1106 is disposed on the right side of the body portion to close the second opening.

The body portion may be configured as a cylindrical structure, a first opening and a second opening are provided at two ends of the body portion, and the first opening and the second opening are respectively suitable for installing the rotor and the stator of the first motor 111 and the rotor and the stator of the second motor 112, after the rotor and the stator of the first motor 111 and the stator of the second motor 112 are installed, the left end cover 1105 and the right end cover 1106 are suitable for sealing the first opening and the second opening, so as to seal the motor assembly 11, the left end of the motor shaft of the first motor 111 may be matched with the left end cover 1105, and the right end of the motor shaft of the second motor 112 may be matched with the right end cover 1106.

According to one embodiment of the present invention, the first motor shaft 1113 is adapted to be connected to the first reducer on the left side of the first motor 111, the motor shaft of the second motor 112 is adapted to be connected to the second reducer on the right side of the second motor 112, the left end cap 1105 is configured as part of the housing of the first reducer, and the right end cap 1106 is configured as part of the housing of the second reducer.

In the motor assembly 11, a motor shaft of the first motor 111 is connected with the first speed reducer, a motor shaft of the second motor 112 is connected with the second speed reducer, and the first speed reducer and the second speed reducer are respectively connected with the motor shaft of the first motor 111 and the motor shaft of the second motor 112 and then can reduce the speed and increase the torque of the power output by the first motor 111 and the second motor 112, and then transmit the power to wheels on the left side and the right side, so that the power transmission of the vehicle 1000 is realized.

The left end cover 1105 is constructed as a part of the shell of the first speed reducer, and the right end cover 1106 is constructed as a part of the shell of the second speed reducer, so that the arrangement of the first speed reducer and the second speed reducer is convenient, the integration degree of the motor assembly 11 is improved, and the structure of the motor assembly is more compact.

According to the motor assembly 11 of the present application, the dual motor housing 110, the housing of the first speed reducer and the housing of the second speed reducer are integrally formed, so that the connection between the motor assembly 11 and the first speed reducer and the second speed reducer is more compact, the integration level of the motor assembly 11 is further improved, and the cost of the motor assembly 11 and the cost of the power transmission system of the vehicle are further reduced; the left end cover 1105 is constructed as a part of a first reducer casing, the right end cover 1106 is constructed as a part of a second reducer casing, and at least parts of the casings of the first reducer and the second reducer are parts of the motor assembly 11, so that the integrated casings can be formed separately, and the difficulty of integrally forming the casings is reduced.

According to one embodiment of the present application, a left side of the barrier 1102 is provided with a first bearing mount 1103, a right side of the barrier 1102 is provided with a second bearing mount 1104, the first bearing mount 1103 is adapted to fix a right side bearing of a motor shaft of the first motor 111, and the second bearing mount 1104 is adapted to fix a left side bearing of the second motor shaft 1123.

The baffle 1102 is suitable for separating a motor mounting space, a first bearing mounting seat 1103 and a second bearing mounting seat 1104 are respectively arranged at the left side and the right side of the baffle 1102, and the first bearing mounting seat 1103 and the second bearing mounting seat 1104 are used for mounting a bearing; the first motor shaft 1113 is fixed to the first rotor 1112, and the right end of the first motor shaft 1113 is fixed to the first bearing mounting base 1103 through the first motor bearing 1114 to be fixed to the baffle 1102; the second motor shaft 1123 is fixed to the second rotor 1122, and the left end of the second motor shaft 1123 is fixed to the second bearing mount 1104 by the second motor bearing 1124 so as to be fixed to the barrier 1102.

The baffle 1102 is provided to separate the motor installation space, and the baffle 1102 can also be used for installing bearings to ensure the reliability of the installation of the rotor and the motor shaft of the first motor 111 and the rotor and the motor shaft of the second motor 112.

A third bearing mounting seat 1107 is arranged on the left end cover 1105, a fourth bearing mounting seat 1108 is arranged on the right end cover 1106, the third bearing mounting seat 1107 is suitable for fixing a third motor bearing 1115 at the left end of the motor shaft of the first motor 111, and the fourth bearing mounting seat 1108 is suitable for fixing a fourth motor bearing 1125 at the right end of the motor shaft of the second motor 112.

Specifically, the left end of first motor shaft 1113 is fixed to left end cover 1105 through a third bearing, left end cover 1105 is provided with a third bearing mount 1107 for fixing third motor bearing 1115, the right end of second motor shaft 1123 is fixed to right end cover 1106 through a fourth motor bearing 1125, and right end cover 1106 is provided with a fourth bearing mount 1108.

The first bearing mount 1103, the second bearing mount 1104, the third bearing mount 1107, and the fourth bearing mount 1108 may be configured as a bearing mounting chamber, and an outer ring of the bearing is mounted on an inner wall surface of the bearing mounting chamber by interference fit or/and fixing by a fastener.

According to the utility model discloses an embodiment, motor assembly 11 still includes water-cooling device, and water-cooling device includes water pump and the cooling water course of setting in a plurality of motor casings 110a, and the water pump links to each other with the cooling water course in order to pump the cooling water into the cooling water course, and wherein total casing includes interior casing 1109 and shell body 1101, and the shell body 1101 is spaced apart with interior casing 1109 between, still is provided with a plurality of water course muscle between shell body 1101 and the interior casing 1109 in order to inject the cooling water course.

Specifically, the inner housing 1109 is disposed inside the outer housing 1101, the inner housing 1109 may be configured as the dual motor housing 110 (i.e., the overall housing) in the above embodiment, the outer housing 1101 is spaced apart from the inner housing 1109 to form a cooling water channel through which cooling water may flow, and the cooling water may flow in the cooling water channel, and the flow of the cooling water in the cooling water channel is adapted to lead out heat inside the dual motor housing 110, so as to cool the inside of the motor assembly 11, thereby ensuring reliability of the motor assembly 11.

Still be provided with a plurality of water course muscle between outer casing 1101 and the interior casing 1109, a plurality of cooling water courses are injectd jointly to water course muscle, outer casing 1101 and interior casing 1109, and the water course muscle can be further injectd the flow direction of cooling water course and the size of cooling water course to reduce the sectional area of cooling water course, and then improve the velocity of flow of cooling water, accelerate the cooling effect of cooling water to interior casing 1109, keep in stable within range with the temperature of guaranteeing interior casing 1109, improve motor assembly 11's reliability.

Furthermore, a plurality of motors can share the same water-cooling device, and cooling water channels of the plurality of motors can be mutually connected in series or in parallel.

According to the utility model discloses an embodiment, motor assembly 11 still includes the cold cooling device of oil, and the cold cooling device of oil includes oil pump 122, oil tank, sets up the nozzle hole 121 and the oil pipe of connecting oil tank (bottom oil tank 123) and nozzle hole 121 in the total casing, and oil pump 122 is linked together oil tank and nozzle hole 121 in order to go into nozzle hole 121 with the coolant oil pump.

Wherein, the oil tank sets up the bottom at a plurality of motor casings 110a, and the oil tank is linked together with total casing, the oil tank can link to each other with the oil cooler, coolant oil in total casing enters into the oil tank after cooling the stator and the rotor with the motor, the higher coolant oil of temperature is stored in the oil tank, the temperature reduces after the oil cooler to the coolant oil, rethread oil pump 122 and oil pipe, coolant oil pump after will cooling is gone into in nozzle hole 121, nozzle hole 121 sets up in total casing, and nozzle hole 121 is a plurality of, and every nozzle hole 121 is just right with the winding of motor respectively, in order to be suitable for cooling the direct heat source in the motor.

The oil cooling device can directly cool the rotor and the stator in the motor by utilizing the insulativity of the cooling oil, and can directly cool a direct heat source, so that the cooling efficiency is high, and the reliability is good.

Further, a plurality of motors can share the same oil cooling device, and the oil spray holes 121 on the plurality of motors and the oil tank can be connected in series or in parallel.

The vehicle 1000 according to the present invention is briefly described below.

According to the utility model discloses a vehicle 1000 is provided with the motor assembly 11 of above-mentioned embodiment, because according to the utility model discloses a vehicle 1000 is provided with the motor assembly 11 of above-mentioned embodiment, and consequently this vehicle 1000's motor assembly 11's space occupies for a short time, and arranging between motor assembly, the reduction gear in the vehicle 1000 is compact, and power transmission system's occupation space is little, and the reliability is high, and stability is good.

A brief description of one embodiment according to the present application follows.

The motor assembly 11 of the present application is a dual-core motor, two sets of stators and rotors, i.e., the first motor 111 and the second motor 112, are mounted inside the dual-motor housing 110, the first motor 111 and the second motor 112 can be respectively driven and controlled, and the first motor 111 and the second motor 112 can run at a different speed. The output shafts of the first motor 111 and the second motor 112 extend away from each other toward both ends.

A left end cover 1105 and a right end cover 1106 are respectively installed on two sides of the dual motor case 110 of the motor assembly 11, and a gear reducer, a belt reducer, a chain reducer, etc. may also be installed on two sides of the dual motor case 110.

The two end covers of the motor assembly 11 of the present application may be secured with bolts. Two sets of stators and two sets of rotors are arranged in the double-motor shell 110, a baffle 1102 is arranged in the middle of the double-motor shell 110, the baffle 1102 is used for separating the two rotors and placing rotor bearings, and the motor is connected with the left and right speed reducers through bolts. The rotor shaft (motor shaft) is directly connected with or matched with the gear shaft of the speed changer.

The motor assembly 11 according to the application is provided with a dual-core motor, so that a differential mechanism structure is not required to be installed in the whole vehicle structure. When the vehicle 1000 turns, the torque and the rotating speed of the first motor 111 and the second motor 112 can be regulated and controlled by the electric control system to realize a differential function, the motor assembly 11 is flexible to control, the structure of the whole vehicle is optimized, and the power transmission system of the vehicle is more compact.

The motor assembly 11 can be provided with a water cooling device or an oil cooling device;

when the motor assembly 11 uses a water-cooling device, the casing can be divided into three main components, i.e., an inner casing 1109, an outer casing 1101 and water channel ribs, the water channel can be arranged on the inner casing 1109 or the outer casing 1101, the inner casing 1109 is tightly matched with the outer casing 1101 and forms an internal water channel circulation network together with the water channel ribs, so as to cool the stator of the motor and ensure the stable performance of the motor,

in the water-cooling cycle, the outer housing 1101 may be configured as a metal shell having an H-shaped axial cross section, and the inner housing 1109 may be two. And the left and right ends are respectively matched with the outer shell 1101, and in order to ensure the end surface water flow of the inner shell water channel and the processing technology, the end cover in the inner part can also be designed with a water baffle. Fixed on the end surface of the inner housing 1109;

when the motor uses the oil cooling system, can only use a pair of motor casing 110 to be provided with the hydrojet hole of direct oil spout to the stator winding at two motor casing 110 tops, in order to the cooling of stator winding, set up oil cooler and oil pump 122, make the inside cooling oil circulation of entire system, in order to reach the inside rapid cooling's of motor purpose, guarantee the high-efficient operation of motor.

When the motor assembly 11 adopts oil cooling, the interior of the stator and the winding is directly cooled, the cooling effect is more efficient and faster, and the cooling liquid (oil) is only filled and can be recycled.

When the motor assembly 11 is water-cooled, the total shell is a double-layer shell, and the inner shell and the outer shell form a water channel for cooling the stator core.

The power system adopts a dual-core motor, has double output and double drive in the back direction, is mainly applied to the front and rear drive wheel sides of an automobile, can realize four-wheel drive carrying by one set of system, and can be applied to other power systems.

As shown in fig. 1, 2 and 3, which are structural views of a dual motor case 110. The casing of the dual-core motor can be formed by tightly matching an inner casing 1109 and an outer casing 1101 into a whole or directly and integrally formed, and two sets of stators and rotors are arranged inside the dual-core motor. The two ends of the dual-core motor can be correspondingly provided with a left end cover 1105 and a right end cover 1106 and locked and fixed by bolts, and the left end cover 1105 and the right end cover 1106 can be designed into a box body of a reduction gearbox to form a dual-speed change system of the motor; or the left end cover 1105 and the right end cover 1106 are directly constructed as a suspension fixing plate, and power is directly output to wheels on two sides without a speed reducer.

The two ends of the dual motor case 110 are provided with a left end cover 1105 and a right end cover 1106 or a reduction box. A bearing chamber (bearing mounting seat) for mounting a rotor bearing is arranged at the center of the left end cover 1105 and the right end cover 1106; the double motor casing 110 is constructed as a metal casing with an H-shaped axial section, a circular support plate (baffle 1102) is arranged at the center of the inside of the casing to separate the installation space of the two stators and the rotor, bearing chambers for installing rotor bearings are arranged at the left side and the right side of the circular support plate, and the stator shafts of the first motor 111 and the second motor 112 are respectively fixed at the left end and the right end of the casing. The rotor axially and concentrically penetrates through an inner hole of the stator, two ends of a shaft extension of the rotor are respectively provided with a bearing, the bearings are coaxially arranged in a bearing chamber at the center of the end cover, and the other bearing of the rotor is coaxially arranged in a bearing chamber at the center of a circular supporting plate in the shell, so that a set of motor excitation core power source with the concentrically arranged stator and rotor is formed. The same installation method is applied to the excitation core power source at the other end of the motor.

The stator of the motor assembly 11 can be provided with electronic elements such as a temperature sensor 1203, a resistor, a capacitor, an inductor and the like to optimize the performance of the stator; the rotor of the motor assembly 11 may be provided and equipped with various position sensors, such as a photo sensor, a magnetic hall sensor, a resolver, and the like.

In the motor assembly 11, when the dual motor casing 110 is a tubular casing, the motor can be cooled in a self-cooling or air-cooling mode.

In the motor assembly 11, when the double-motor shell 110 is designed as a double-layer water channel, the motor can be cooled in a water mode.

When the double-motor shell 110 is provided with an oil way on the shell, or the end cover or the reduction gearbox body, the motor assembly 11 can be made into an oil cooling mode to directly cool the winding, the stator and the rotor iron core of the motor.

An electric motor assembly 11 according to an embodiment of the present invention is described below with reference to fig. 4 to 7.

It should be noted that the utility model discloses a motor assembly 11 can be single motor assembly, bi-motor assembly or many motor assemblies, the utility model discloses do not prescribe a limit to the motor quantity in motor assembly 11.

According to the utility model discloses a motor assembly 11 includes motor casing 110a and oil cooling system 12, is provided with the motor installation space who holds stator and rotor in the motor casing 110a, and oil cooling system 12 is suitable for to stator and rotor spray cooling oil including setting up the spray set on motor casing 110a, spray set.

According to the utility model discloses a motor assembly 11 utilizes the coolant oil to have insulating characteristic, makes the coolant oil directly cool off the stator of motor and the rotor of motor, dispels the heat to the direct source that generates heat in motor assembly 11, has improved motor assembly 11's radiating efficiency greatly, adopts the cold cooling method of oil to need not to carry out the layering setting with the casing of motor simultaneously, and the manufacturing of motor casing 110a is simpler, and motor casing 110 a's reliability has obtained the improvement simultaneously.

Specifically, the oil cooling system 12 includes a spraying device disposed on the motor housing 110a, the spraying device sprays cooling oil to the stator and the rotor to cool the direct heat source in the motor assembly 11, the cooling oil is in direct contact with the stator and the rotor, the heat exchange efficiency of the cooling oil is higher, and meanwhile, the accumulation of heat in the motor housing 110a can be prevented.

The motor assembly 11 of this application adopts oil cooling system 12, compares with the motor assembly who adopts water cooling system, and the wall thickness of the motor casing 110a of the motor assembly 11 who adopts oil cooling system 12 is thinner, and the size of motor is littleer, and the available space of stator and rotor is bigger.

In the oil cooling system 12, the cooling oil directly contacts with the stator and the rotor of the motor, and the water cooling system generally cools the stator and the rotor through cooling the inner shell, and the winding of the motor assembly 11 and the inner shell generally have a temperature difference of 10 ℃ -20 ℃.

According to the motor assembly 11 of this application, through set up spray set on motor casing 110a, spray set sprays the cooling oil to stator and rotor, makes the direct stator and the rotor to motor assembly 11 in of cooling oil cool off, and motor assembly 11's cooling efficiency is high, and the wall thickness of this motor assembly 11's casing is thin, and is small, and motor assembly 11's temperature control is more accurate.

According to the utility model discloses an embodiment, spray set constructs for the nozzle opening 121 that sets up on motor casing 110a, nozzle opening 121 is that the winding of every group nozzle opening 121 of multiunit ware and the rotor that corresponds is just right, nozzle opening 121 links to each other with the oil spout circulation pipeline of oil cooling system 12, nozzle opening 121 can directly spray the coolant oil on the winding of rotor, and the winding is the direct source that generates heat of motor assembly 11, every group nozzle opening 121 can be directly to the oil spout of motor winding, make the temperature reduction of motor winding, multiunit nozzle opening 121 makes the temperature of winding even in the motor, can not take place the local overheated condition.

After the cooling oil is sprayed on the rotor rotating at a high speed, the cooling oil can be sputtered on the surface of the stator to cool the stator of the motor, the iron core is also a direct heating source of the motor assembly 11, and the cooling oil can be sputtered on the surface of the iron core to cool the iron core, so that the temperature inside the motor assembly 11 is kept within a controllable range.

According to the utility model discloses an embodiment, nozzle hole 121 sets up at the top of motor casing 110a, and oil-cooled cooling system 12 still includes oil pump 122, and oil inlet 1221 of oil pump 122 links to each other with motor installation space's bottom, and oil-out 1222 of oil pump 122 links to each other with nozzle hole 121's one end, and nozzle hole 121's the other end links to each other with motor installation space's top.

The nozzle hole 121 sets up the top at motor casing 110a to be suitable for the cooling oil after nozzle hole 121 is spouted, naturally flow to motor accommodation space's bottom under the effect of self gravity, the cooling oil spouts to the rotor through nozzle hole 121, motor assembly 11 is at the during operation, the rotor rotates at a high speed, part cooling oil still can splash the surface of stator or iron core, set up nozzle hole 121 can make the cooling oil cool off the rotor in motor assembly 11, stator and iron core more fully at motor casing 110 a's top.

The oil pump 122 is a power source in the oil cooling system 12, the oil pump 122 provides power for circulation of cooling oil, the cooling oil at the bottom of the motor installation space is connected with the oil inlet 1221 of the oil pump 122, and the cooling oil returns to the top of the motor installation space from the bottom of the motor installation space under the action of the oil pump 122 and enters the motor installation hole space again through the oil injection hole 121 to cool the stator and the rotor.

According to the utility model discloses an embodiment, oil-cooled cooling system 12 still includes bottom oil tank 123 and heat exchanger 124, and bottom oil tank 123 includes hot oil tank and cold oil tank 1233, and the inlet port of hot oil tank links to each other with motor installation space's bottom, and the oil-out of cold oil tank 1233 links to each other with the oil inlet of oil pump 122, and the oil inlet of heat exchanger 124 links to each other with the oil-out of hot oil tank, and the oil-out of heat exchanger 124 links to each other with the oil inlet of cold oil tank 1233.

After cooling oil cools off rotor and stator in the motor installation space, the temperature rises, temporarily store in the bottom of motor installation space, the inlet port of hot oil tank links to each other with the bottom of motor installation space, the cooling oil that stores in motor installation space bottom enters into hot oil tank, cooling oil can accomplish in hot oil tank and filter, be provided with heat exchanger 124 between hot oil tank and cold oil tank 1233, heat exchanger 124 is suitable for cooling to cooling oil, cooling oil after cooling gets into in cold oil tank 1233, the oil-out of cold oil tank 1233 links to each other with oil pump 122, oil pump 122 is gone into spray opening 121 with cooling oil pump again, in order to cool off motor assembly 11.

From this, the coolant oil accomplishes a circulation, in the circulation of oil cooling system 12, the coolant oil enters into motor installation space from nozzle 121, and carry out the heat transfer cooling to stator and rotor in the motor installation space, the heat in the motor assembly 11 will be carried to the coolant oil enters into hot oil tank, set up the oil cooler between hot oil tank and cold oil tank 1233, the oil cooler carries out the heat transfer to the coolant oil of high temperature, make the temperature of coolant oil reduce, the coolant oil that the temperature reduces gets back to in the motor installation space again after oil pump 122, with further cooling to motor assembly 11.

According to an embodiment of the present invention, the hot oil tank includes a first hot oil tank 1231 and a second hot oil tank 1232, an oil inlet of the first hot oil tank 1231 is connected to the bottom of the motor installation space, an oil outlet of the second hot oil tank 1232 is connected to an oil inlet of the heat exchanger 124, an oil outlet of the first hot oil tank 1231 is connected to an oil inlet of the second hot oil tank 1232, and a filter screen 1202 is disposed between the oil outlet of the first hot oil tank 1231 and the oil inlet of the second hot oil tank 1232, the filter screen 1202 is adapted to filter the cooling oil, after the cooling oil is filtered, impurities, residue dust, etc. will be left in the filter screen 1202, and filter screen 1202 is removably disposed between first and second hot sumps 1231 and 1232, so that the filter screen 1202 is cleaned regularly, the arrangement of the filter screen 1202 can greatly reduce the impurities in the cooling oil, and the reliability of the oil cooling system 12 is improved.

According to an embodiment of the present invention, the oil-cooled cooling system 12 further includes a top oil tank 125, the oil inlet of the top oil tank 125 is connected to the oil outlet 1222 of the oil pump 122, and the oil outlet of the top oil tank 125 is connected to one end of the oil injection hole 121. The top oil tank 125 can link to each other with the one end of multiunit nozzle opening 121, can play the effect of buffer memory coolant oil in the top oil tank 125, the coolant oil is temporarily stored in the top oil tank 125, and the top oil tank 125 links to each other with the one end of multiunit nozzle opening 121, the setting up of top oil tank 125 makes multiunit nozzle opening 121 spout the coolant oil in can be even reliably to the motor installation space, make the oil spout volume of every group nozzle opening 121 more even, the cooling effect of the cold cooling system 12 of oil has been improved.

According to an embodiment of the present invention, the top oil tank 125 includes a tank body and a tank cover 1251 detachably disposed on the tank body, and the tank body is integrally formed with the motor housing 110 a. The top oil tank 125 inner chamber used for containing the cooling oil is defined between the tank cover 1251 and the tank body, the inner chamber of the top oil tank 125 is connected with one end of the oil spray hole 121, the tank body and the motor casing 110a are integrally formed to enable the top oil tank 125 to be more convenient to set, and the tank cover 1251 is detachably arranged to reduce the forming difficulty of the motor casing 110 a.

According to the utility model discloses an embodiment, be provided with a plurality of stators in the motor casing 110a and a plurality of and stator complex rotor, the motor casing 110a of a plurality of motors is integrated into one piece, and a plurality of motor casings 110a can be constructed as total casing.

The vehicle 1000 according to the present invention is briefly described below.

According to the utility model discloses a vehicle 1000 is provided with the motor assembly 11 of above-mentioned embodiment, because according to the utility model discloses a vehicle 1000 is provided with the motor assembly 11 of above-mentioned embodiment, and consequently this vehicle 1000's motor assembly 11's cooling efficiency is high, and motor assembly 11 is small, and the space occupies for a short time, and motor assembly 11 reliability is high, and stability is good.

A specific embodiment of the present invention is described below with reference to the drawings.

The motor assembly 11 of this application adopts oil cooling system 12, has very big difference with traditional water cooling system, and the first heat sources such as winding, iron core that the oil stream can direct cooling motor inside, and water cooling system can only lead to the cooling casing and cool off stator core, winding. The cooling locations are different.

In the motor assembly 11 according to the embodiment, a top oil tank 125 and an oil passage are provided on the top of the motor casing 110a, and the top oil tank 125 is sealed by a tank cover 1251 and locked by a screw; inside motor casing 110a, be provided with several rows of nozzle opening 121 directly over the winding end cover, the cooling oil that nozzle opening 121 spouts is suitable for the cooling winding, and the both ends of motor casing 110a are equipped with the end cover, and the end cover forms inclosed motor installation space together with motor casing 110 a.

As shown in fig. 4, an arrow indicates a flow direction of cooling oil, the cooling oil flows from the top oil tank 125 to the stator winding along the plurality of oil injection holes 121, after removing heat from the winding and the iron core, the cooling oil flows to the bottom of the motor installation space to form an oil surface, and flows to the bottom oil tank 123 through an oil inlet hole of a hot oil tank designed in the bottom of the motor installation space, a filter screen 1202 is disposed between the first hot oil tank 1231 and the second hot oil tank 1232, the cooling oil enters the second hot oil tank 1232 after being filtered, and then enters the oil cooler through a pipeline, the oil cooler is provided with an oil inlet hole and an oil outlet hole, the oil outlet hole of the second hot oil tank 1232 is connected to the oil inlet hole of the oil cooler, the cooling oil in the second hot oil tank 1232 exchanges heat with water flow in the oil cooler, after the oil temperature is reduced, the cooling oil flows out from the oil outlet hole, enters the cold oil tank 1233, and then flows out from the oil outlet hole of, through pumping of the oil pump 122, the oil outlet 1222 of the oil pump 122 flows to the top oil tank 125 of the motor to form circulation.

A box body is arranged at the top of the motor shell 110a, a box cover 1251 is locked with a box body screw to form a sealed top oil box 125, a temperature sensor 1203 is arranged on a winding lead-out wire of the stator, and the temperature sensor 1203 is immersed below the oil level; a filter screen 1202 is installed between the first hot oil tank 1231 and the second hot oil tank 1232, the filter screen 1202 is fastened through screws, a bottom oil tank cover is arranged below the second hot oil tank 1232, and the bottom oil tank cover is installed in a sealing mode through screws to form a closed space; the fuel tank cap 1251 is removable to facilitate replacement and maintenance of the filter screen 1202.

The top surface of the oil cooler and the lower plate of the motor casing 110a are hermetically installed and fixed by screws, two closed spaces are formed between the top surface of the oil cooler and the lower surface of the motor casing 110a, one is a third hot oil tank and a cold oil tank 1233, the oil cooler is provided with an oil inlet hole and an oil outlet hole, and the oil cooler is provided with a water inlet pipe 1241 and a water outlet pipe 1242; and a cooling oil pipeline and a cooling water pipeline in the oil cooler are arranged close to each other so as to dissipate heat of the cooling oil by using cooling water.

The oil pump 122 is installed on the motor casing 110a, the oil pump 122 is provided with an oil inlet 1221 and an oil outlet 1222, the oil inlet is communicated with the cold oil tank 1233, and the oil outlet 1222 is communicated with the top oil tank 125 through a pipeline.

The application of motor assembly 11 compares with current oil cooling technique, and the advantage has:

(1) the motor casing 110a is internally provided with no oil injection pipeline and oil injection head, the oil injection hole 121 is arranged at the top of the casing and right above the winding in rows, the winding on the rotor can be cooled more fully, and the cooling efficiency is high.

(2) A temperature sensor 1203 for measuring oil temperature and oil level is arranged in the motor assembly 11 of the present application, so as to monitor the oil temperature and the oil amount in the motor installation space in real time;

(3) a filtering system for filtering cooling oil is arranged in the motor assembly 11;

(4) the oil cooling system 12 in the motor assembly 11 and the oil cooler and oil pump 122 in the circulating system are directly installed on the casing of the motor, and the oil cooler, oil pump 122 and motor casing 110a can be integrally formed, so that the integration degree is high, and the cost is low;

(5) the motor casing 110a of the motor assembly 11 of the application is provided with the pressure vent valve 1201, so that the air pressure in the closed space inside the motor is stable.

Other forms of arrangement of the motor assembly 11:

1. the oil cooler is arranged on the speed reducer assembly or the electric control assembly;

2. the oil pump 122 is mounted on the reducer assembly, or on the electronic control assembly;

3. the motor assembly 11 and the reducer assembly share an oil cooling system 12;

4. a cooling oil pipeline of the motor assembly 11 and a cooling water pipeline in the electric control assembly are integrally designed;

5. the motor assembly 11 can be oil cooled and water cooled simultaneously.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 present invention. 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An electric machine assembly, comprising:

a motor housing, in which a motor installation space accommodating a stator and a rotor is provided;

an oil-cooled cooling system, the oil-cooled cooling system comprising: and the spraying device is arranged on the motor shell and is suitable for spraying cooling oil to the stator and the rotor.

2. The motor assembly of claim 1, wherein said spray assembly is configured as a spray hole disposed in said motor casing.

3. The motor assembly of claim 2, wherein the oil injection holes are in a plurality of sets and each set of oil injection holes is aligned with a corresponding winding of the rotor.

4. The motor assembly of claim 2, wherein said oil injection holes are provided at the top of said motor casing;

the oil cooling system further comprises: the oil inlet of the oil pump is connected with the bottom of the motor installation space, the oil outlet of the oil pump is connected with one end of the oil spray hole, and the other end of the oil spray hole is connected with the top of the motor installation space.

5. The electric machine assembly of claim 4, wherein the oil-cooled cooling system further comprises: bottom oil tank and heat exchanger, the bottom oil tank includes: the oil inlet of the hot oil tank is connected with the bottom of the motor installation space, the oil outlet of the cold oil tank is connected with the oil inlet of the oil pump, the oil inlet of the heat exchanger is connected with the oil outlet of the hot oil tank, and the oil outlet of the heat exchanger is connected with the oil inlet of the cold oil tank.

6. The electric machine assembly of claim 5, wherein the hot oil tank comprises: the oil inlet of the first hot oil tank is connected with the bottom of the motor installation space, the oil outlet of the second hot oil tank is connected with the oil inlet of the heat exchanger, the oil outlet of the first hot oil tank is connected with the oil inlet of the second hot oil tank, and a filter screen is arranged between the oil outlet of the first hot oil tank and the oil inlet of the second hot oil tank.

7. The electric machine assembly according to claim 5, wherein the oil-cooled cooling system further comprises: the oil inlet of the top oil tank is connected with the oil outlet of the oil pump, and the oil outlet of the top oil tank is connected with one end of the oil injection hole.

8. The motor assembly of claim 7, wherein the top oil tank comprises: the box and detachably set up case lid on the box, the box with motor casing integrated into one piece.

9. The motor assembly according to any one of claims 1 to 8, wherein a plurality of stators and a plurality of rotors engaged with the stators are provided in the motor casing.

10. A vehicle comprising an electric machine assembly according to any one of claims 1 to 9.