CN105264752B

CN105264752B - motor with liquid cooling housing

Info

Publication number: CN105264752B
Application number: CN201480030720.0A
Authority: CN
Inventors: B·D·钱伯林; S·伯顿
Original assignee: Remy Technologies LLC
Current assignee: Remy Technologies LLC
Priority date: 2013-05-30
Filing date: 2014-05-29
Publication date: 2018-01-26
Anticipated expiration: 2034-05-29
Also published as: KR20160014055A; DE112014002106T5; CN105264752A; WO2014194060A1

Abstract

The present invention relates to a kind of motor, and it has stator module, rotor assembly and housing unit, and the housing unit has two end caps and axially extending inside and outside component.Rib on one of internal housing member and outer housing member engages another in internal housing member and outer housing member in void space, and defines axially extending fluid path section.Liquid coolant flowing path can be spiral type.The width of rib can be more than the radial thickness of sleeve part, and rib extends from the sleeve part.End cap can be attached to the rib of width expansion by fastener.Inside and outside housing is advantageously extrudable.Electronic unit can be thermally coupled with end cap, and be arranged on the radially inner side of multiple end diverter fluid passages and axially move closer to multiple end diverter fluid passages.Electronic unit can be at least partially axially arranged between the distal side limit of the winding of stator module and the axial limit of spiral type fluid path.End cap can be with spring bearing component.

Description

Motor with liquid cooling housing

This application claims " ELECTRIC MACHINE WITH LIQUID submitting, entitled on May 30th, 2013 The COOLED HOUSING motor of liquid cooling housing (have) ", Serial No. 13/905,787 U.S. Patent application with And " ELECTRIC MACHINE WITH LIQUID COOLED HOUSING AND submitting, entitled on May 30th, 2013 END CAP (motor with liquid cooling housing and end cap) ", Serial No. 13/905,953 U.S. Patent application it is excellent First weigh, the disclosure of this two documents is incorporated herein by reference.

Technical field

The present invention relates to motor, more particularly it relates to the motor with housing, the housing is used for cooling down motor.

Background technology

Motor is included stator assembly and rotor assembly, and rotor assembly rotates relative to stator module.Motor may be operative to Motor, generator or motor/generator, motor/generator can be operated optionally as motor or generator.When operation is horse Up to when, electric current is input in motor to produce mechanical torque.When operation is generator, mechanical torque is input in motor to produce Raw electric current.

In some applications, motor needs to use cooling system to remove heat from motor during operation.In motor operation Period, most heat is produced by the winding of stator module.It is therefore generally desirable to removed by directly from winding hot or logical Cross and remove heat from stator core to cool down stator module.A kind of universal method that heat is removed from stator core is to pacify stator module In the commonly referred to as housing of " water jacket ", wherein housing and stator core directly engages, and housing is cold including multiple liquid But passage.The cooling agent of such as water cycles through the passage of housing, to remove heat from housing.Therefore, housing is gone from stator core Except heat, and thus remove heat from the winding of stator module.

Still it is expected to be improved in terms of the shell structure of this motor and in terms of the manufacturing cost saving of housing.

The content of the invention

The present invention provides a kind of motor, and it has a housing unit for being used for circulating cooling agent, and the housing unit can be with Cost-effective mode is manufactured and assembled.

In one form, the present invention includes motor, and the motor includes stator module, and the stator module can with rotor assembly Operatively couple, wherein the stator module includes stator core and multiple windings, and rotor assembly can rotate around rotation axis.Electricity Machine also includes housing unit, the housing unit include the first end cap and the second end cap and axially extending internal housing member and Outer housing member.Stator core be arranged in axially extending internal housing member and with axially extending internal housing member It is thermally coupled.Outer housing member surrounds internal housing member setting and internally edge between housing member and outer housing member Radially defined void space.Multiple ribs radially prolong from a housing member in internal housing member and outer housing member Reach in void space, each rib has distal end, in distal end engagement internal housing member and outer housing member Relative housing member.The relative housing member in internal housing member and outer housing member is tubular sleeve, The tubular sleeve has towards the substantially smooth wall-like surface of void space.The distal end of each rib in the multiple rib Engaged with smooth wall-like surface.Multiple ribs define multiple axially extending fluid path sections in void space.First End cap and the second end cap seal dead air space space axially opposite end, housing unit defines entrance and exit, its Middle liquid coolant enters entrance, along the fluid path for including the multiple axially extending fluid path section, and And discharged by exporting.

In certain embodiments, the multiple rib extends radially outward from internal housing member, substantially smooth wall-like Surface is radially towards the cylindrical surface of inner side.

In other embodiments, internal housing member and outer housing member and the first end cap and the second end cap define For the spiral-type path of liquid coolant, wherein liquid coolant in circumferentially adjacent fluid path section along opposite Axial direction flows, the axial direction of flow of fluid between adjacent section, close to the position of the first end cap and the second end cap It is reverse to put place.

In other embodiments, being extended with the internal or external housing member of multiple ribs includes the tubulose with radial thickness Part, and at least some in wherein the multiple rib define that the circumferentially extending bigger than the radial thickness of tubular portion is wide Degree.In such embodiments, the first end cap and the second end cap can be fixed using threaded fastener, the screw threads for fastening Part is extended in hole, and the hole position is in the circumferential width rib bigger than the radial thickness of tubular portion.

Advantageously, internal housing member and outer housing member each have axial length and defined along corresponding The substantially uniform cross section of whole axial length of housing member, thus internal housing member and outer housing member are to squeeze Go out.

In other embodiments, the first end cap defines multiple end diverter fluid passages, and these end diverter fluids lead to Road arranges that its medial end portions diverter fluid passage makes adjacent fluid circumferentially around the first axial end portion simultaneously close to stator module Fluid communication between path-segments, and wherein the motor also includes the electronic unit being thermally coupled with the first end cap, the electronics Part is arranged on the radially inner side of multiple end diverter fluid passages and axially move closer to multiple end diverter fluid passage.At this In the embodiment of sample, fluid path can limit spiral-type path, wherein the first end cap defines the of spiral type fluid path One axial limit, first axial limit exceed the distal side limit of winding in the first axial end portion vertically, and wherein should Electronic unit be at least partially disposed on the winding of the first axial end portion the distal side limit and spiral type fluid path first Between axial limit.

In another aspect, the present invention includes motor, and the motor includes stator module, the stator module and rotor assembly It is operatively coupled, wherein the stator module includes stator core and multiple windings, and rotor assembly can rotate around rotation axis. Motor also includes housing unit, and the housing unit includes the first end cap and the second end cap and axially extending internal housing member And outer housing member.Stator core is arranged in internal housing member and is thermally coupled with internal housing member, external shell structure Part sets around internal housing member and space sky is internally radially defined between housing member and outer housing member Between.Multiple ribs are extended radially into void space from a housing member in internal housing member and outer housing member, Each rib has distal end, the relative housing structure in distal end engagement internal housing member and outer housing member Part.The relative housing member in internal housing member and outer housing member has towards the substantially smooth of void space Wall-like surface, wherein the distal end of each rib in the multiple rib engages with smooth wall-like surface.Multiple ribs are in sky Multiple axially extending fluid path sections are defined in gap space.Internal housing member and outer housing member each define Axial length and the substantially uniform cross section of whole axial length along corresponding housing member is defined, thus inner shell Body component and outer housing member are extrudable.It is extended with the internal housing member and outer housing member of multiple ribs One housing member includes the tubular portion with radial thickness, and at least some in wherein the multiple rib define ratio The big circumferentially extending width of the radial thickness of tubular portion.Multiple fasteners engage the first end cap and the second end cap, and extend Into hole, the hole position is in the circumferential width rib bigger than the radial thickness of tubular portion, thus by the first end cap and the second end Lid is fixed to one housing member in internal housing member and outer housing member.First end cap and the second end cap seal The axially opposite end in ground dead air space space, and entrance and exit is defined, wherein liquid coolant enters entrance, along The helical for liquid coolant limited by internal housing member and outer housing member and the first end cap and the second end cap Type fluid path, and discharged by exporting.

The present invention can also provide a kind of motor, and wherein housing circulates cooling agent, and including at least one end cap, should End cap is thermally coupled with electronic unit or spring bearing component.

In another aspect, the present invention includes motor, and the motor includes stator module, the stator module and rotor assembly It is operatively coupled, wherein the stator module includes stator core and multiple windings, and rotor assembly can rotate around rotation axis. At least one axially extending housing member is thermally coupled with stator core, and defines multiple axially extending fluid passages. End cap is defined multiple end diverter fluid passages of axially extending fluid passage interconnection.End diverter fluid passage Arranged circumferentially around the first axial end portion simultaneously close to stator module, thus axially extending fluid passage and end turn to logical Road defines spiral-type path.The radially inner side of multiple end diverter fluid passages is arranged on the electronic unit that end cap is thermally coupled And axially move closer to multiple end diverter fluid passages.

In certain embodiments, end cap defines the first axial limit of spiral-type path, and first axial limit is One axial end portion exceedes the distal side limit of the winding of stator module vertically.In such embodiments, electronic unit can be with At least partially axially it is arranged on the distal side limit and spiral-type path of the winding of the stator module of the first axial end portion Between first axial limit.

Some embodiments can also include the second end cap, second end cap be arranged on stator module with the first axial end portion The second relative axial end portion, wherein the second end cap engages with axially extending housing member, and it is multiple axially extending Fluid passage defines multiple paired passages.For each composition to passage, the second end cap can be constructed such that it by fluid Flowing is re-directed to another paired passage from a passage in paired passage, and wherein the second end cap defines helical Second axial limit in type path, second axial limit is in the second axial end portion close to the second remote of the winding of stator module Side pole limits.

In another aspect, the present invention includes motor, and the motor includes stator module, the stator module and rotor assembly It is operatively coupled, wherein the stator module includes the winding of stator core and multiple stator modules, and rotor assembly, which is arranged on, to be turned On sub- axle, wherein rotor assembly and armature spindle can rotate around rotation axis.Motor also includes at least one axially extending shell Body component, at least one axially extending housing member is thermally coupled with stator core, and is defined multiple axially extending Fluid passage.Define at least one heat conduction end caps of multiple end diverter fluid passages by axially extending fluid passage phase Connect.Multiple end diverter fluid passages arrange circumferentially around and close to the first axial end portion of stator module, thus axle Spiral-type path is defined to the fluid passage of extension and end diverter fluid passage.Bearing assembly is arranged on end cap, and can Pivotally support armature spindle.

In certain embodiments, motor also includes the second end cap of heat conduction, second end cap be arranged on stator module with The second relative axial end portion of first axial end portion, and engaged with axially extending housing member.It is multiple axially extending Fluid passage defines multiple paired passages, wherein, passage, the second end cap are led to flow of fluid from paired for each composition A passage in road is re-directed to another paired passage, and wherein the second end cap defines the second of spiral-type path Axial limit, the second distal side limit of second axial limit in the second axial end portion close to the winding of stator module.It can revolve The second bearing component for turning ground support armature spindle may be mounted on the second end cap.

Brief description of the drawings

The following explanation of the embodiment of the present invention, above and other feature of the invention and its acquisition are referred in conjunction with the accompanying drawings Method will become more apparent, and be better understood invention in itself, wherein：

Fig. 1 is the perspective view of motor.

Fig. 2 is another perspective view of motor.

Fig. 3 is the cross-sectional view of motor.

Fig. 4 is the perspective cross-sectional view of motor.

Fig. 5 is the perspective view of motor, and wherein outer housing member is removed.

Fig. 6 is another perspective view of motor, and wherein outer housing member is removed.

Fig. 7 is the partial side view of motor, and wherein outer housing member is removed.

Fig. 8 is the cross-sectional view of internal housing member and outer housing member.

Fig. 9 is the side view of end cap.

Figure 10 is the end-view of end cap.

Figure 11 is the end-view of alternative end cap.

Figure 12 is the perspective view of alternative internal housing member.

Figure 13 is the cross-sectional view of alternative motor.

Corresponding reference symbol shows the corresponding part through some views.Although if example listed herein is with dry form Embodiments of the invention are shown, but embodiment as disclosed below is not in detail or for the scope of the present invention is limited Make disclosed precise forms.

Embodiment

Motor 20 is shown in Fig. 1-4, the motor includes rotor assembly 22 and stator module 24.In the illustrated embodiment, Motor 20 is interior permanent magnets motor/generator.However, housing unit disclosed herein can be used for other types of motor.

The rotor assembly 22 of diagram can rotate around rotation axis 30, and have conventional structure, and the conventional structure has The rotor core 26 formed by the electrical sheet lamination stacked.Rotor core 26 also defines axially extending slit, permanent magnet 28 It is arranged in slit.Rotor core 26 is arranged on armature spindle 32, and the armature spindle is pivotably supported by bearing assembly 34,36. Belt wheel 38 is arranged on an end of armature spindle 32.Belt wheel 38 can engage with the band for transmitting moment of torsion, for example, so as to for The turbine of booster in vehicle provides power.Although the motor 20 of diagram is shown as with belt wheel 38, alternative Embodiment can be used for other application, and may be used as motor, generator or motor/generator.

The sensor cluster 40 of rotation for monitoring armature spindle 32 is located at the end relative with belt wheel 38 of armature spindle 32 Place.Sensor cluster 40 includes rotating member 42 and static component 44, and can take resolver, hall effect sensor or The form of other appropriate sensors.In the example in the figures, rotating member 42 is the ring for having projection ferrous metal tusk, should Tusk defines the discrete target of the static component 44 for hall effect sensor, thus, it is possible to monitor armature spindle 32 Rotating speed.The use of hall effect sensor and similar sensor is well-known for those of ordinary skills.

Stator module 24 includes stator core 46, and the stator core is also formed by the electrical sheet lamination stacked.Diagram is determined Sub-component 24 has stator core 46, and the stator core defines slit that is axially extending and being open radially inward.It is also normal The coil for being commonly referred to as winding 48 is inserted into the slit of stator core 46 and has end wire turn, and the end wire turn extends over The axial end portion of stator core 46.In the illustrated embodiment, motor 20 is three phase electric machine.

Utilize routine techniques manufacture rotor assembly 22 well-known for those of ordinary skills and stator Component 24.For example, rotor core 26 and stator core 46 are by the multiple electrical sheet lamination shapes imprinted in progressive die component Into.The lamination for forming rotor core 26 and stator core 46 can be by being bonded with each other in welding, adhesive, adjacent laminates Protuberance and slit and be fixed together, or can be fixed together by other suitable methods.It is for example, a kind of fixed folded The adhesive means of piece are directed to use with two-part asphalt mixtures modified by epoxy resin fat, and one of part is applied to the lower surface of each lamination, Another part is applied to the top surface of each lamination.Once stacking, lamination is heated up, and two parts are attached to Together, and the iron core of bonding is formed.

After stator core 46 is formed, winding 48 is inserted into stator core 46 using the coil insertion equipment of routine In.Similarly, after rotor core 26 is formed, permanent magnet 28 is inserted into the slit of rotor core 26.

Permanent magnet 28 can be magnetized before in rotor core 26, or can not be magnetized when mounted And it is subjected to magnetic properties after in rotor core 26.Permanent magnet 28 can be formed advantageously by neodymium iron boron.When Formed permanent magnet 28 when can include dysprosium, to provide larger temperature stability, and allow magnetic material better against Magnetic force loses.A variety of other materials may also be used for forming permanent magnet 28, including rare earth material, such as lithium, terbium and samarium.Use These and other magnetic material is that those of ordinary skill in the art are well-known come the permanent magnet formed for motor.Forever Magnet 28 is additionally may included in the outer layer material that external skin is formed on magnet, such as is formed by electroplating on magnetic material Nickel dam or the aluminium lamination that is diffuseed to form by steam.Such external skin can be used for strengthening corrosion resistance.

Permanent magnet 28 can engage or by other conjunctions by adhesive, by the press-fit with rotor core 26 Suitable means are maintained in the axial slots of rotor core 26.For example, rotor core 26 can be heated, to cause rotor core 26 and rotor core in the size thermal expansion of slit that is formed, so as to provide be inserted into for permanent magnet 28 it is enough in slit Gap.Permanent magnet 28 can also be frozen, to reduce their size.Then, rotor core 26 and the energy of permanent magnet 28 Ambient temperature is enough returned to, wherein the rotor core 26 and forever when rotor core 26 and permanent magnet 28 are in mutually synthermal The size of long magnet 28 causes permanent magnet 28 to be securely engaged and be fixed in rotor core with rotor core 26.

Rotor assembly 22 and stator module 24 are arranged in housing unit 50.Housing unit 50 is included around stator module 24 Axially extending internal housing member 52 and axially extending outer housing member 54.Internal housing member 52 is circular and direct Stator core 46 is engaged, is thus thermally coupled with stator core 46.In the illustrated embodiment, internal housing member 52 has multiple axles To extension, radially raised rib 56.Outer housing member 54 surround internal housing member 52, and remote with rib 56 Side end 58 engages.Internally define void space 60 between housing member and outer housing member 52,54, rib 56 is by space 60 are subdivided into multiple axially extending fluid path sections 62.Stream of the cooling agent by housing unit 50 is discussed in further detail below It is dynamic.

In the illustrated embodiment, outer housing member 54 takes the form of tubular cylinder shape sleeve, have radially towards The substantially smooth wall-like surface 64 of inner side and radially towards the substantially smooth wall-like surface 66 in outside.External shell The manufacturing cost saving of housing unit 50 is easy in the cross section of the simplification of component 54, and can allow in axle in some applications Standard-sized, commercially available pipe is used in manufacture to the internal housing member and one of outer housing member of extension Material.It should be noted that although diagram embodiment uses the rib 56 extended radially outward from internal housing member 52, it is available for The embodiment of selection can use such rib 56, and the rib is positioned on outer housing member 54, and radially inwardly extending, To engage with the internal housing member 52 for simplifying cross section, such as the radially inner and outer surface with substantially smooth wall-like Tubular sleeve.

Although illustrating embodiment uses the cylindrical sleeve of the inner and outer surfaces with smooth wall-like as inside and outside One of housing member, but alternative tubular sleeve can also be used.For example, outer housing member 54 can its towards Radiating fin is provided with outer surface, to promote to dissipate the heat into surrounding environment, or can have what is stretched out from it Mounting ears by means of bolt or other fasteners to fix motor 20 or has the appearance formed in outer housing member 54 Further feature on face.Although it is also noted that in the illustrated embodiment outer housing member 54 radially towards inner side Surface 64 be smooth wall-like cylindrical surface, its symmetry promotes the efficiency of manufacture and assembling, but can also use Other shapes and construction, precondition are that the shape of relative internal housing member 52 and/or rib 56 and construction enter as needed Row modification, to provide the cooperation of inside and outside housing member 52,54 engagement.

End cap 68,70 is internally positioned and the opposed end of outer housing member 52,54 at, and be sealed shut space sky Between end to axial.In the illustrated embodiment, end cap 70 defines entrance 72 and outlet 74, wherein cooling agent (such as water Or the antifreeze coolant based on water) entered by entrance 72, flowed then along fluid path 76, the fluid path includes multiple Axially extending fluid passage, these fluid passages form the axially extending fluid path section of larger fluid path 76 62.Flowing is reverse in the axial end portion of each fluid path section 62, and enters circumferentially adjacent fluid path section, To flow in opposite direction, thus fluid path 76 defines is used for liquid before liquid coolant is by the discharge of outlet 74 The spiral-type path of cooling agent.Pipeline 73,75 connects with entrance 72 and outlet 74 respectively, and stretches out, in order to entrance 72 are connected to external coolant pipeline with outlet 74.

In the embodiment shown in Fig. 1-7, inside and outside housing member 52,54 has substantially the same axial length 53, and each rib in multiple ribs 56 has axially extending degree 55, the axially extending degree and internal housing member It is substantially the same with the axial length 53 of outer housing member 52,54.In this construction with total length rib 56, by end cap 68th, the reverse of flow of fluid occurs in the 70 end diverter fluid passages 78 limited, wherein each end diverter fluid passage 78 Fluid is delivered to circumferentially adjacent fluid path section 62 from an axially extending fluid path section 62.Thus, this The adjacent fluid path-segments of axially extending fluid path section 62 are connected with each other by a little ends diverter fluid passage 78.

Alternatively, at least some rib 56a end sections are removed by machining, are thus defined Axially extending degree 57, the axially extending degree are less than the axial length 53 of internal housing member and outer housing member 52,54. So, the rib 56a of shortening defines end diverter fluid passage 78a, and the path makes between adjacent fluid path section 62 Cooling agent connects, such as to understand with reference to figure 12.Cooling agent is allowed to flow internally housing member and external shell when using In the axial limit of component 52,54 during reverse rib 56a, the end cap 68a close to end diverter fluid passage 78a positioning can have There is substantially flat surface, the axial end portion of surface engagement internal housing member and outer housing member 52,54, thus reduce manufacture Machining needed for end cap 68a.

In the embodiment with total length rib 56 and in the embodiment of the rib 56a with shortening, fluid path 76 limits Determined the spiral-type path for liquid coolant, wherein cooling agent in circumferentially adjacent fluid path section 62 along opposite Axial direction flowing, the axial direction of flow of fluid is between adjacent fluid path section 62 close to end cap 68,70 Opening position is reverse.In other words, fluid path section 62 defines multiple passages 63 in pairs, wherein for each composition to passage 63 For, flow of fluid is re-directed to another in paired passage by end cap 68 or 70 from a passage 63a in paired passage Individual passage 63b.In this regard, it is noted that, in an axial end portion, special modality (for example, 63a) will be with the spy Adjacent passage (for example, 63b) in one peripheral side of routing in pairs, in another axial end portion, the special modality By the adjacent passage (for example, 63c) in another peripheral side with the special modality in pairs, spiral type road is thus defined Footpath.

It is also noted that although diagram embodiment individually changes nyctitropic stream each using flow direction at passage Dynamic path, but alternative embodiment can use the adjacent flowing of such flow path, two of which or more Passage is as single passage and with flow of fluid in same direction.Then, the flow of fluid reversely and will be communicated to phase As groups of adjacent flow channels, these adjacent flow channels provide flow of fluid in opposite direction.

The otch of rib 56a end can be located on two axial end portions of multiple ribs, or be located only within an axle To on end.For example, all there is the otch for defining end diverter fluid passage 78a if all of rib, then a rib will There is otch an end, and two ribs on its either side there will be otch on opposed end so that otch is from one Individual axial end portion is alternately arranged to another axial end portion, thus limits spiral type path.If otch is located only within an axle To end, then will have total length every a rib.For example, it may be possible to advantageously, an end cap defines that end turns to stream Body passage 78 and entrance 72 and outlet 74, and relative end cap has flat surface 80.In such embodiments, rib will held Lid define end diverter fluid passage 78, entrance 72 and export 74 end extend to inside and outside housing member 52, 54 axial limit, and the end cap with flat surface 80 is by internally positioned and outer housing member 52,54 end to axial Place, the end diverter fluid passage 78a limited by the otch in rib 56a are located at the end to axial.

End diverter fluid passage 78 in end cap 68,70 define end cap 68,70 with flowing through the cold of housing unit 50 But the active surface region that agent directly contacts, and it is thus cold to be delivered to heat energy from stator module 24 with internal housing member 52 But heat energy is delivered to cooling agent by the mode similar mode of agent from end cap 68,70.This allows end cap 68,70 to contribute to cooling fixed Sub-component 24 and/or the other parts for cooling down motor 20, as discussed in more detail below.Although end cap 68a is substantially flat with it Surface 80 big surface region as end diverter fluid passage 78 is not provided, but by end diverter fluid passage The influence of flow of fluid in 78a, and directly contacted end cap 68a quality with this of cooling agent with flowing through housing unit 50 cooling agent with the similar mode of end diverter fluid passage 78 to be thermally coupled.It is frequently advantageous that, by flat surface 80 It is oriented to relative to 30 degree in a vertical angle of rotation axis, as shown in figure 13, to simplify the manufacture of housing unit 50, however, surface 80 orientation can be changed, if such change is advantageous to the application-specific of motor 20.Can be used for end cap 68, Another modification of end diverter fluid passage 78 in 70 be in the surface of end diverter fluid passage 78 using projection or Other irregular structures, to provide the surface region of the increase for heat transfer or turbulent flow is produced in flow of fluid.

Cooling agent through housing unit 50 cycles through coolant system (not shown), and the coolant system includes being used for The device (for example, radiator or similar heat-exchange device) of heat is removed from cooling agent, and is advantageously comprised for making cooling Agent cycles through the pump or similar device of housing unit 50.Therefore, in cooling agent by exporting 74 after housing unit discharge, And before cooling agent returns to housing unit 50 by entrance 72, cooling is delivered to through during housing unit 50 in cooling agent The heat of agent is removed.It is also noted that housing unit 50 can be a part for bigger and more complicated cooling system, should Cooling system circulates the coolant through multiple devices for needing to remove heat.Using such coolant system, such as with interior The coolant system having in the vehicle of combustion engine, it is well-known for those of ordinary skills.

Internal housing member and outer housing member 52,54 can be made of a variety of materials.Internal housing member 52 needs Formed, and be frequently advantageous that by same or analogous material by the material that heat can be delivered to cooling agent from stator module 24 Material forms outer housing member 54, and thus, inside and outside housing member 52,54 all has identical thermal coefficient of expansion.Scheming Show in embodiment, internal housing member and outer housing member 52,54 are formed by aluminum.When the weight for it is expected to cause motor 20 When amount minimizes, such as when motor 20 is used in vehicle, it is favourable that inside and outside housing member 52,54 is formed using aluminium 's.However, other metal materials may also be used for forming inside and outside housing member 52,54, and make motor when undesirable Other metal materials are probably favourable when 20 weight minimizes.

In the illustrated embodiment, the construction of internal housing member and outer housing member 52,54 is easy to save manufacturing cost. More specifically, each cross section vertical with rotation axis 30 of inside and outside housing member 52,54 is along inside and outside The whole axial length 53 of portion's housing member 52,54 is substantially uniform, thus inside and outside housing member 52,54 To be manufactured using expressing technique.After inside and outside housing member 52,54 is cut into pieces, it may be necessary to carry out one Fixed machining, but such machining will be that degree is less in case of need.For example, internally and external shell Could be formed with screwed hole and circular groove in the axial end surface of component 52,54, with provide the attachment of end cap 68,70 and The sealing of O-ring or other containment members, so as to seal the company between inside and outside housing member 52,54 and end cap 68,70 Socket part.In the embodiment using the rib 56a shortened, it will also need to remove rib 56a by machining or other suitable means End to form end diverter fluid passage 78a.A small amount of extra machining is also likely to be desired, such as forms attachment position Put for housing unit 50 is fixed into vehicle frame or for internal housing member 52 to be aligned with stator module 24, or The other supplemental characteristic structures formed in housing unit 50.It is still possible that by outer housing member 54 be machined as being formed into Mouth 72 and outlet 74, rather than these feature structures are formed on one of end cap.

In the illustrated embodiment, end cap 68,70 is formed by cast aluminium material, however, other suitable means and material Material may also be used for forming end cap 68,70.As described above, O-ring or other containment members 82 can be used for providing end cap 68,70 And the sealing between inside and outside housing member 52,54, wherein two O-rings on each axial end portion.So, each End, an O-ring are positioned at the radially inner side of the void space 60 between internal housing member 52 and end cap, an O shape Ring is positioned at the radial outside of the void space 60 between internal housing member 52 and end cap.In other words, O-ring is arranged on inside Each axial end portion of each housing member in housing member and outer housing member 52,54, and it is arranged on inner shell Between body component and outer housing member 52,54 and end cap 68,70.Although diagram embodiment provides sealing using O-ring, It is alternatively other types of containment member, such as packing ring or fluid sealant, it may be used as containment member 82。

End cap 68,70 can be attached using threaded fastener 84 or other suitable means.In the illustrated embodiment, End cap 68,70 has axially extending hole 85, and fastener 84 is inserted through the hole.It is axially extending interior to be positioned at one or two Screwed hole 86 in portion and outer housing member 52,54 is engaged by fastener 84, is thus fixed to end cap 68,70 internal and outer Portion's housing member 52,54.By using wider rib 56, screwed hole 86 can be advantageously disposed in rib 56.Implement in diagram In example, internal housing member 52 has tubular portion 88, and the tubular portion defines radial thickness 90, and rib 56 defines specific diameter The width 92 of the circumferentially extending big to thickness 90.In the illustrated embodiment, each rib 56 only has one an end Screwed hole 86, adjacent rib 56 have hole 86 in relative end, and thus end cap 68 is attached every a rib 56, and is held Lid 70 is also attached every a rib 56, and each rib 56 is only only attached to an end cap using threaded fastener.It is also possible to Using thin rib and thick rib in single embodiment, wherein only thick rib has the screwed hole of the attachment for end cap.

Threaded fastener is allowed to be positioned adjacent in the radial direction of void space 60 using the screwed hole 86 being positioned in rib 56 Point.This allows end cap to engage internal housing member and external shell with the power of substantially suitable and balance sensing axial direction Body component 52,54, so as to be easy to end cap 68,70 and inside and outside housing member during the whole service life of motor 20 52nd, 54 sealing engagement.Also allow the size of each tubular portion of inside and outside housing member 52,54 according to structure and The consideration of aspect of performance is formed, and the consideration is not included in the necessity in tubular portion with screwed hole.For many applications For, this can allow the radial thickness of tubular portion to be positioned at the tubular portion of axially extending housing member than screwed hole 86 In in the case of the radial thickness that has it is small.It is also noted that define that this construction of the rib of the expansion of screwed hole may be used also The embodiment for extending internally from outer housing member 54 for rib rather than stretching out from internal housing member 52.

It is also noted that do not use tapped blind hole in rib 56, hole 86 can be not threaded, and extending rib 56 Whole axial length.In such embodiments, long bolt can extend through end cap on one end, through rib 56, and relative end cap is passed through, for being fixed.In such embodiments, the homogeneous compaction of containment member will be facilitated, And the quantity of fastener will be reduced.In addition, in such alternative embodiment, the hole in rib 56 can be extrusion , rather than machine in rib 56 screwed hole of formation.For the whole length of hole extending rib 56 stay bolt embodiment with And for the embodiment of blind hole is used in rib 56, fastener will engage end cap 68,70 and extend in the hole in rib 56.

As described above, armature spindle 32 and rotor assembly 22 rotate around rotation axis 30 together, and by bearing assembly 34,36 It is pivotably supported.Bearing assembly 34,36 is arranged on and is formed in the hub 35,37 on end cap 68,70.Therefore, end cap 68,70 is used Make the radiating fin of bearing assembly 34,36.In addition, because end cap is thermally coupled with cycling through the cooling agent of housing unit 50, institute Waste heat will be removed from end cap 68,70 with cooling agent.Thus, end cap 68,70 can remove heat from bearing assembly 34,36.Although from Bearing assembly 34,36 removes heat and may be restricted, but in some applications, it can allow using little by little smaller axle Hold, and thus more save the manufacturing cost of motor 20.

The more significant miscellaneous function of end cap 70 is cooling electronic unit 94.In the illustrated embodiment, electronic unit 94 wraps Printed circuit board (PCB) and inverter are included, the printed circuit board (PCB) has the control circuit of the operation for controlled motor 20, the inverter For the DC electric current from Vehicular battery to be converted into AC electric currents, to be powered for motor 20.However, alternative embodiment Different electronic units can be used or including other electronic unit.For example, motor 20 is also used as generator, and set There is rectifier, the rectifier is used to the AC electric currents of motor generation being converted to DC electric current, to be charged for battery.

Electronic unit 94 is thermally coupled (such as by the way that electronic unit 94 is arranged on end cap 70) with end cap 70 will allow to hold Lid 70 is used as the radiating fin of electronic unit 94.In addition, end cap 70 is thermally coupled with cycling through the cooling agent of housing unit 50, will Heat is removed from end cap 70, and is thus actively cooled electronic unit 94.End cap 70 is used as radiating fin and is actively cooled electronics This arrangement of part 94 can be convenient right within the temperature range of allowing in the operating condition of the whole wide scope of motor 20 Electronic unit 94 is safeguarded.

Electronic unit 94 be advantageously positioned in the end diverter fluid passage 78 defined in end cap 70 radially inner side and It is axially adjacent.It should be noted that winding 48 extends axially beyond stator core 46, and the outermost part of winding 48 is in electricity The end to axial of machine defines the distal side limit 96,98.Similarly, spiral type fluid path 76 defines spiral type fluid Relative two axial limit 100,102 in path.Make spiral type fluid path 76 axial limit 100,102 extend beyond around Cooling of the distal side limit 96,98 of group 48 generally to stator module 24 does not provide any significant contribution.Therefore, it is generally favourable , end cap is positioned on the axial end portion of no electronic unit 94, to limit the axial limit 102 of spiral type fluid path 76 Close to the distal side limit 98 of winding 48.Only spiral type fluid path 76 is set to extend beyond the distal side limit 98 for except cooling In the case of certain purpose outside stator module 24, spiral type fluid path extends beyond the distal side limit of winding 48, and just have can Advantage can be provided.

Axial end portion (end cap 70 i.e., in the illustrated embodiment) place residing for electronic unit 94 in motor 20, by end Lid is configured so that the distal side limit 96 that the axial limit 100 of spiral type fluid path 76 is axially positioned more than winding 48 can be with The cooling of electronic unit 94 or the cooling of some feature structures in addition to stator module 24 of motor 20 are provided.Therefore, Distance between the distal side limit of an axial end portion stator module of motor and the axial limit of fluid path is more than The distance between the distal side limit of the axially opposite end stator module of motor and the axial limit of fluid path.For example, Embodiment is exemplarily illustrated as shown, and electronic unit 94 advantageously can completely or at least partially be positioned at winding vertically Between the 48 distal side limit 96 and the axial limit 100 of spiral type fluid path 76, in order to heat from electronic unit 94 effectively It is delivered to end cap 70.

It is also noted that make the one or more for the winding 48 that spiral type fluid path 76 extends beyond stator module remote Side pole limit 96,98 can be also used for the purpose in addition to the part for cooling down motor 20.For example, helical flow path 76 It is such it is axially extending can be used for from cooling agent remove heat.In such alternative embodiment, end cap can include Heat is dissipated in surrounding environment by fin, the fin from cooling agent, to remove heat from cooling agent.

In the illustrated embodiment, cover plate 104 is positioned on the axial end portion of end cap 70, and is provided to electronic unit 94 With the protection of sensor cluster 40.Cover plate 104 is fixed using fastener 84, and the fastener is used for end cap 70 being attached to Rib 56.Central opening in cover plate 104 aligns with grommet 106, and allows wire rod (not shown) to enter.The wire rod transmits electricity Stream is also used in sensor cluster 40, electronic unit 94 and peripheral control unit (such as vehicle with to be powered to motor 20 Electronic control unit (" ECU ")) between transmit sensing data and control signal.

It is list according to a preferred embodiment of the invention below：

1. a kind of motor, it includes：

Stator, the stator module are operatively coupled with rotor assembly, and wherein the stator module includes stator core and more Individual winding, rotor assembly can be rotated around rotation axis, and the length of stator module is extended in the axial direction relative to each other of motor The distance between distal side limit of the winding of end；

Housing unit, the housing unit include the first end cap and the second end cap and axially extending internal housing member and Outer housing member, wherein：

Stator core is arranged in internal housing member and is thermally coupled with internal housing member, and outer housing member is around interior Portion's housing member sets and void space is internally radially defined between housing member and outer housing member；

Multiple ribs, the multiple rib radially prolong from a housing member in internal housing member and outer housing member Reach in void space, each rib has distal end, in distal end engagement internal housing member and outer housing member Relative housing member, the relative housing member in internal housing member and outer housing member is tubular sleeve, The tubular sleeve has towards the substantially smooth wall-like surface of void space；The distal end of each rib in the multiple rib Engaged with smooth wall-like surface；The multiple rib defines multiple axially extending fluid path sections in void space； And

First end cap and the second end cap define end diverter fluid passage, and fluid path section is turned to by these ends Fluid passage connects in the axially opposite end of motor；

Electronic unit is arranged on the radially inner side of end diverter fluid passage,

Wherein the first end cap and the second end cap seal dead air space space axially opposite end, housing unit limits Entrance and exit, wherein liquid coolant enter entrance, along including the multiple axially extending fluid path section and The fluid path of end diverter fluid passage, and discharged by exporting；And

The length of wherein fluid path extends to two the distance between limit, and fluid to axial of fluid path The length in path is more than the length of stator module, thus contributes to cool down the ministry of electronics industry along the liquid coolant of fluid path Part.

2. according to the motor described in preferred embodiment 1, wherein the multiple rib radially prolongs from internal housing member Stretch, substantially smooth wall-like surface is radially towards the cylindrical surface of inner side.

3. the motor according to preferred embodiment 1 or 2, wherein internal housing member and outer housing member and first End cap and the second end cap define the spiral-type path for liquid coolant, and wherein liquid coolant is in circumferentially adjacent stream Flowed in body path-segments along opposite axial direction, the axial direction of flow of fluid between adjacent fluid path section, It is reverse in the opening position close to the first end cap and the second end cap.

4. the motor according to any one of preferred embodiment 1 to 3, wherein internal housing member and outer housing member With roughly the same axial length, and each rib in wherein the multiple rib has and internal housing member and outside The roughly the same axially extending degree of the axial length of housing member.

5. according to the motor described in preferred embodiment 4, wherein each in the first end cap and the second end cap defines Multiple end diverter fluid passages, these end diverter fluid passages make the fluid communication between adjacent fluid path section.

6. the motor according to any one of preferred embodiment 1 to 3, wherein internal housing member and outer housing member With roughly the same axial length, at least some in multiple ribs are shortened and with than internal housing members and external shell The small axially extending degree of the axial length of component, the rib of shortening, which defines, connects the fluid between adjacent fluid path section Logical end diverter fluid passage.

7. according to the motor any one of preferred embodiment 6, wherein at least one in the first end cap and the second end cap Individual to define substantially flat surface, the flat surface can be in the end diverter fluid passage proximate and inner shell that the rib by shortening limits Body component and outer housing member engagement.

8. the motor according to any one of preferred embodiment 1 to 7, wherein internal housing member and outer housing member Each there is axial length and define generally uniform along the whole axial length of corresponding internal or external housing member Cross section, thus internal housing member and outer housing member are extrudable.

9. according to the motor described in preferred embodiment 8, the phase wherein in internal housing member and outer housing member To housing member be substantial cylindrical sleeve.

10. the motor according to any one of preferred embodiment 1 to 9, it also includes four containment members, wherein including Each axial end portion of each housing member in portion's housing member and outer housing member is provided with a sealing structure Part, each containment member and one of the first end cap and the second end cap and one of internal housing member and outer housing member Sealingly engage and be arranged on one of the first end cap and the second end cap and one of internal housing member and outer housing member it Between.

11. the motor according to any one of preferred embodiment 1 to 10, wherein being extended with the inner shell structure of multiple ribs A housing member in part and outer housing member includes the tubular portion with radial thickness, and wherein the multiple rib In at least some define the circumferentially extending width bigger than the radial thickness of tubular portion.

12. according to the motor described in preferred embodiment 11, wherein the first end cap and the second end cap are entered using threaded fastener Row is fixed, and the threaded fastener is extended in hole, and the hole position is in the circumferential width rib bigger than the radial thickness of tubular portion In.

13. the motor according to any one of preferred embodiment 1 to 12, wherein the first end cap defines that multiple ends turn To fluid passage, these end diverter fluid passages are arranged circumferentially around the first axial end portion simultaneously close to stator module, end Portion's diverter fluid passage makes the fluid communication between adjacent fluid path section, and the wherein motor also includes and first end Cover the electronic unit that is thermally coupled, the electronic unit be arranged on the radially inner side of multiple end diverter fluid passages and axially move closer to Multiple end diverter fluid passages.

14. according to the motor described in preferred embodiment 13, wherein fluid path defines spiral type fluid path, first end Lid defines the first axial limit of spiral type fluid path, and first axial limit exceedes vertically in the first axial end portion The distal side limit of winding, and wherein the electronic unit is at least partially disposed on the distal side pole of the winding of the first axial end portion Between limit and the first axial limit of spiral type fluid path.

15. a kind of motor, it includes：

Stator module, the stator module are operatively coupled with rotor assembly, and wherein the stator module includes stator core With multiple windings, rotor assembly can be rotated around rotation axis, and the length of stator module is extended in the relative to each other of motor The distance between distal side limit of the winding of axial end portion；

Stator core is arranged in axially extending internal housing member and joined with axially extending internal housing member heat Connect, axially extending outer housing member sets around axially extending internal housing member and in axially extending inner shell Void space is radially defined between body component and axially extending outer housing member；

Multiple ribs, the multiple rib radially prolong from a housing member in internal housing member and outer housing member Reach in void space, each rib has distal end, in distal end engagement internal housing member and outer housing member Relative housing member；The relative housing member in internal housing member and outer housing member has towards space The substantially smooth wall-like surface in space, wherein the distal end of each rib in the multiple rib connects with smooth wall-like surface Close；The multiple rib defines multiple axially extending fluid path sections, the first end cap and the second end cap in void space End diverter fluid passage is defined, fluid path section is by these end diverter fluid passages in the axially opposite of motor End connects；And wherein each of internal housing member and outer housing member define axial length and define edge The substantially uniform cross section of whole axial length of corresponding housing member, thus internal housing member and outer housing member It is extrudable；

A housing member in internal housing member and outer housing member includes the tubular portion with radial thickness, At least some in wherein the multiple rib define the circumferentially extending width bigger than the radial thickness of tubular portion；And

Multiple fasteners, the multiple fastener engage the first end cap and the second end cap and extended to positioned at circumferential width ratio In hole in the big rib of the radial thickness of tubular portion, thus by the first end cap and the second end cap be fixed to internal housing member and A housing member in outer housing member, wherein the first end cap and the second end cap seal dead air space space it is relative Axial end portion, and entrance and exit is defined, wherein liquid coolant enters entrance, along by internal housing member and outside The fluid path for liquid coolant that housing member and the first end cap and the second end cap limit, and pass through outlet Discharge；And

Electronic unit is arranged on the radially inner side of end diverter fluid passage；

Wherein, the length of fluid path extends to two of the end diverter fluid passage of the fluid path limit to axial The distance between, and the length of fluid path is more than the length of stator module, and it is thus cold along the liquid of fluid path But agent helps to cool down electronic unit.

16. according to the motor described in preferred embodiment 15, wherein the hole in rib is screwed hole, the screwed hole and institute State multiple fastener threads engagements.

17. the motor according to preferred embodiment 15 or 16, wherein internal housing member and outer housing member and First end cap and the second end cap define the spiral type fluid path for liquid coolant, and wherein liquid coolant is circumferentially Flowed in adjacent fluid path section along opposite axial direction, the axial direction of flow of fluid is in adjacent fluid path area Between section, it is reverse in the opening position close to the first end cap and the second end cap.

18. the motor according to any one of preferred embodiment 15 to 17, wherein internal housing member and external shell Component has roughly the same axial length, and wherein the multiple rib has and internal housing member and outer housing member The roughly the same axially extending degree of axial length, and each wherein in the first end cap and the second end cap defines Multiple end diverter fluid passages, these fluid passages make the fluid communication between adjacent fluid path section.

19. the motor according to any one of preferred embodiment 15 to 17, wherein internal housing member and external shell Component has a roughly the same axial length, and at least some in multiple ribs are shortened and with than internal housing member and outside The small axially extending degree of the axial length of housing member, the rib of shortening define the stream made between adjacent fluid path section The end diverter fluid passage of body connection, and at least one wherein in the first end cap and the second end cap defines substantially flat table Face, the flat surface can be in the end diverter fluid passage proximates that the rib by shortening limits and internal housing member and external shell Component engages.

20. the motor according to any one of preferred embodiment 15 to 19, wherein rotor assembly are arranged on armature spindle, Rotor assembly and armature spindle rotate around rotation axis together；The motor also includes armature spindle being pivotally supported at rotor assembly The clutch shaft bearing component and second bearing component on end to axial, wherein clutch shaft bearing component is arranged on the first end cap On, second bearing component is arranged on the second end cap.

21. the motor according to any one of preferred embodiment 15 to 20, wherein the multiple rib is from inner shell structure Part extends radially outward, and outer housing member is the sleeve of tubular cylinder shape, and the sleeve has radially towards the big of inner side Cause smooth wall-like surface and radially surface towards outside.

22. the motor according to any one of preferred embodiment 15 to 21, it also includes four containment members, wherein Each axial end portion of each housing member in internal housing member and outer housing member is provided with a sealing Component, each containment member and one of the first end cap and the second end cap and internal housing member and outer housing member it One sealingly engages and is arranged on one of the first end cap and the second end cap and one of internal housing member and outer housing member Between.

23. the motor according to any one of preferred embodiment 15 to 22, wherein the first end cap defines multiple ends Diverter fluid passage, these end diverter fluid passages circumferentially around and close to stator module the first axial end portion arrange, End diverter fluid passage makes the fluid communication between adjacent fluid path section, and wherein the motor also includes and first The electronic unit that end cap is thermally coupled, the electronic unit are arranged on the radially inner side of multiple end diverter fluid passages and leaned on vertically Nearly multiple end diverter fluid passages.

24. according to the motor described in preferred embodiment 23, wherein the first end cap defines the first of spiral type fluid path Axial limit, first axial limit exceed the distal side limit of winding, and the wherein electricity in the first axial end portion vertically Subassembly is at least partially disposed on the distal side limit of the winding of the first axial end portion and the first axle of spiral type fluid path To between the limit.

25. according to the motor described in any one of foregoing preferred embodiment, wherein in an axial end portion stator of motor The distance between the distal side limit of component and the axial limit of fluid path are more than the axially opposite end stator in motor The distance between the distal side limit of component and the axial limit of fluid path.

Although being described the present invention as exemplary design, it is also possible in spirit and scope of the present disclosure It is interior that the present invention is modified.Therefore the application be intended to using any modification patterns of its general principles, purposes or Adaptive version.

Claims

1. a kind of motor (20), it includes：

Stator module (24), the stator module are operatively coupled with rotor assembly (22), and wherein the stator module (24) includes Stator core (46) and multiple windings (48), rotor assembly (22) can rotate around rotation axis (30), stator module (24) Length extend between the distal side limit (96,98) of the winding (48) of the axial end portion relative to each other of motor (20) away from From；

Housing unit (50), the housing unit include the first end cap and the second end cap (68,68a, 70) and axially extending interior Portion's housing member and outer housing member (52,54), wherein：

Stator core (46) is arranged in internal housing member (52) and is thermally coupled with internal housing member, outer housing member (54) set around internal housing member (52) and internally radially defined between housing member and outer housing member Void space (60)；

Multiple ribs (56,56a) radially prolong from a housing member in internal housing member and outer housing member (52,54) Reach in void space (60), each rib (56,56a) has distal end (58), distal end engagement internal housing member With the relative housing member in outer housing member (52,54), in internal housing member and outer housing member (52,54) The relative housing member is tubular sleeve, and the tubular sleeve has the substantially smooth wall-like table towards void space (60) Face (64)；

The distal end (58) of each rib in the multiple rib (56,56a) engages with smooth wall-like surface (64)；

The multiple rib (56,56a) defines multiple axially extending fluid path sections (62) in void space (60)；And And

First end cap and the second end cap (68,68a, 70) define end diverter fluid passage (78,78a), fluid path section (62) connected by these end diverter fluid passages in the axially opposite end of motor (20)；And

Electronic unit (94) is arranged on the radially inner side of end diverter fluid passage (78,78a),

Wherein the first end cap and the second end cap (68,68a, 70) are sealed shut the axially opposite end of void space (60), Housing unit (50) defines entrance (72) and outlet (74), and wherein liquid coolant enters entrance (72), along including described Fluid path (76) flowing of multiple axially extending fluid path sections (62) and end diverter fluid passage (78,78a), and And discharged by exporting (74)；And

The length of wherein fluid path (76) extends to two of fluid path (76) to axial between the limit (100,102) Distance, and the length of fluid path is more than the length of stator module, the liquid cooling thus flowed along fluid path (76) Agent helps to cool down electronic unit (94).

2. motor (20) according to claim 1, (56,56a) are from internal housing member (52) edge wherein the multiple rib Extend radially outwardly, substantially smooth wall-like surface (64) is radially towards the cylindrical surface (64) of inner side.

3. motor (20) according to claim 1 or 2, wherein internal housing member and outer housing member (52,54) with And first end cap and the second end cap (68,68a, 70) define the spiral type fluid path (76) for liquid coolant, wherein Along opposite in circumferentially adjacent fluid path section (63a, 63b, 63c) of the liquid coolant in fluid path section (62) Axial direction flowing, the axial direction of flow of fluid between adjacent fluid path section (62), close to the first end cap It is reverse with the opening position of the second end cap (68,68a, 70).

4. motor (20) according to claim 3, wherein internal housing member and outer housing member (52,54) have big Cause identical axial length (53), and each rib wherein in the multiple rib (56,56a) has and internal housing member The axially extending degree (55,57) roughly the same with the axial length (53) of outer housing member (52,54).

Each 5. motor (20) according to claim 4, wherein the first end cap and the second end cap in (68,68a, 70) Multiple end diverter fluid passages (78,78a) are all defined, these end diverter fluid passages make adjacent fluid path section (62) fluid communication between.

6. motor (20) according to claim 3, wherein internal housing member and outer housing member (52,54) have big Cause identical axial length (53), at least some in multiple ribs (56,56a) are shortened and with than internal housing member and outer The small axially extending degree (57) of the axial length (53) of portion's housing member (52,54), the rib (56a) of shortening define make it is adjacent Fluid path section (62) between fluid communication end diverter fluid passage (78a).

7. motor (20) according to claim 6, wherein the first end cap and the second end cap in (68,68a, 70) at least one Individual to define substantially flat surface (80), the end diverter fluid that the flat surface can limit in the rib (56a) by shortening leads to Road (78a) nearby engages with internal housing member and outer housing member (52,54).

8. motor (20) according to claim 1 or 2, wherein internal housing member and outer housing member (52,54) are each From with axial length (53) and defining along the whole of corresponding internal housing member or outer housing member (52,54) Axial length (53) substantially uniform cross section, thus internal housing member and outer housing member (52,54) are extrudable 's.

9. the institute in motor (20) according to claim 8, wherein internal housing member and outer housing member (52,54) State the sleeve that relative housing member is substantial cylindrical.

10. motor (20) according to claim 8, it also includes four containment members (82), wherein housing structure internally Each axial end portion of part and each housing member in outer housing member (52,54) is provided with a containment member (82), one of each containment member (82) and the first end cap and second end cap (68,68a, 70) and internal housing member Sealingly engaged with one of outer housing member (52,54) and be arranged on one of the first end cap and the second end cap and inner shell Between one of component and outer housing member.

11. motor (20) according to claim 1 or 2, wherein being extended with the internal housing member of multiple ribs (56,56a) Include the tubular portion (88) with radial thickness (90) with a housing member in outer housing member (52,54), and At least some ribs wherein in the multiple rib (56,56a) define the week bigger than the radial thickness (90) of tubular portion (88) To extension width (92).

12. motor (20) according to claim 11, (68,68a, 70) utilize screw thread wherein the first end cap and the second end cap Fastener (84) is fixed, and the threaded fastener is extended in hole (85,86), and the hole position is in circumferential width (92) than managing In the big rib of the radial thickness (90) of shape part (88) (56,56a).

13. motor (20) according to claim 1 or 2, (68,68a, 70) define that multiple ends turn wherein the first end cap To fluid passage (78,78a), these end diverter fluid passages circumferentially around and close to stator module (24) first axially End arranges that end diverter fluid passage (78,78a) makes the fluid communication between adjacent fluid path section (62), and Wherein the motor (20) also includes the electronic unit (94) being thermally coupled with the first end cap (68,68a, 70), the electronic unit (94) It is arranged on the radially inner side of the multiple end diverter fluid passage (78,78a) and is turned to axially move closer to the multiple end Fluid passage.

14. motor (20) according to claim 13, wherein fluid path (76) define spiral type fluid path (76), First end cap (68,68a, 70) defines the first axial limit (100,102) of spiral type fluid path (76), and this is first axially The limit exceedes the distal side limit (96,98) of winding (48), and the wherein electronic unit in the first axial end portion vertically (94) the distal side limit (96,98) and spiral type fluid path of the winding (48) of the first axial end portion are at least partially disposed on (76) between the first axial limit (100,102).

15. a kind of motor (20), it includes：

Multiple ribs (56,56a) radially prolong from a housing member in internal housing member and outer housing member (52,54) Reach in void space (60), each rib (56,56a) has distal end (58), distal end engagement internal housing member With the relative housing member in outer housing member (52,54)；

The relative housing member in internal housing member and outer housing member (52,54) has towards void space (60) substantially smooth wall-like surface (64), the distal end (58) of each rib wherein the multiple rib in (56,56a) with Smooth wall-like surface (64) engagement；

The multiple rib (56,56a) defines multiple axially extending fluid path sections (62) in void space (60), One end cap and the second end cap (68,68a, 70) define end diverter fluid passage, and fluid path section (62) passes through these ends Portion's diverter fluid passage connects in the axially opposite end of motor (20)；And wherein internal housing member and external shell Each of component (52,54) defines axial length (53) and defined along corresponding internal housing member or external shell The substantially uniform cross section of whole axial length of component (52,54), thus internal housing member and outer housing member (52, 54) it is extrudable；A housing member in internal housing member and outer housing member (52,54) includes having radially The tubular portion (88) of thickness (90), at least some ribs wherein the multiple rib in (56,56a), which define, compares tubular portion (88) the big circumferentially extending width (92) of radial thickness (90)；

Multiple fasteners (84) engage the first end cap and the second end cap (68,68a, 70) and extended to compares positioned at circumferential width (92) In hole (86) in the big rib of the radial thickness (90) of tubular portion (88) (56,56a), thus by the first end cap and the second end cap (68,68a, 70) are fixed to a housing member in internal housing member and outer housing member (52,54), wherein first end Lid and the second end cap (68,68a, 70) are sealed shut the axially opposite end of void space (60), and define entrance (72) and (74) are exported, wherein liquid coolant enters entrance (72), along by internal housing member and outer housing member The spiral type fluid path for liquid coolant that (52,54) and the first end cap and the second end cap (68,68a, 70) limit (76) flow, and discharged by exporting (74)；And

Electronic unit (94), it is arranged on the radially inner side of end diverter fluid passage (78,78a)；

Wherein, the length of fluid path (76) extends to two of fluid path (76) to axial between the limit (100,102) Distance, and the length of fluid path be more than stator module length, thus along fluid path (76) flow liquid it is cold But agent helps to cool down electronic unit (94).

16. motor (20) according to claim 15, wherein the hole (86) in rib (56,56a) is screwed hole (86), The screwed hole is threadedly engaged with the multiple fastener (84).

17. the motor (20) according to claim 15 or 16, wherein internal housing member and outer housing member (52,54) And first end cap and the second end cap (68,68a, 70) define the spiral type fluid path (76) for liquid coolant, its Along phase in circumferentially adjacent fluid path section (63a, 63b, 63c) of the middle liquid coolant in fluid path section (62) Anti- axial direction flowing, the axial direction of flow of fluid between adjacent fluid path section (62), close to first end The opening position of lid and the second end cap (68,68a, 70) is reverse.

18. motor (20) according to claim 17, wherein internal housing member and outer housing member (52,54) have Roughly the same axial length, and wherein the multiple rib (56,56a) has and internal housing member and outer housing member The roughly the same axially extending degree (55,57) of the axial length (53) of (52,54), and wherein the first end cap and the second end cap Each in (68,68a, 70) defines multiple end diverter fluid passages (78,78a), and these end diverter fluids lead to Road makes the fluid communication between adjacent fluid path section (62).

19. motor (20) according to claim 17, wherein internal housing member and outer housing member (52,54) have Roughly the same axial length (53), at least some in multiple ribs (56,56a) be shortened and with than internal housing member and The small axially extending degree (57) of the axial length (53) of outer housing member (52,54), the rib (56a) of shortening, which defines, makes phase The end diverter fluid passage (78a) of fluid communication between adjacent fluid path section (62), and wherein the first end cap and At least one in second end cap (68,68a, 70) defines substantially flat surface (80), and the flat surface can be in the rib by shortening The end diverter fluid passage (78a) that (56a) is limited nearby engages with internal housing member and outer housing member (52,54).

20. the motor (20) according to claim 15 or 16, wherein rotor assembly (22) are arranged on armature spindle (32), turn Sub-component (22) and armature spindle (32) rotate around rotation axis (30) together；The motor (20) also includes that armature spindle (32) can be revolved It is supported on the clutch shaft bearing component on end to axial and second bearing component (34,36) of rotor assembly (22) with turning, its Middle clutch shaft bearing component (34) is arranged on the first end cap (68,68a), and second bearing component (36) is arranged on the second end cap (70) On.

21. the motor (20) according to claim 15 or 16, (56,56a) are from internal housing member wherein the multiple rib (52) extend radially outward, outer housing member (54) is the sleeve of tubular cylinder shape, and the sleeve has radially inward-facing The substantially smooth wall-like surface (64) of side and radially towards the substantially smooth surface (66) in outside.

22. the motor (20) according to claim 15 or 16, it also includes four containment members (82), wherein shell internally Each axial end portion of body component and each housing member in outer housing member (52,54) is provided with a sealing One of component (82), each containment member (82) and the first end cap and second end cap (68,68a, 70) and inner shell One of component and outer housing member (52,54) sealingly engage and are arranged on one of the first end cap and the second end cap and internal Between one of housing member and outer housing member.

23. the motor (20) according to claim 15 or 16, (68,68a, 70) define multiple ends wherein the first end cap Diverter fluid passage (78,78a), these end diverter fluid passages circumferentially around and close to stator module (24) first axle To be arranged to end, end diverter fluid passage (78,78a) makes the fluid communication between adjacent fluid path section (62), and And wherein the motor (20) also includes the electronic unit (94) being thermally coupled with the first end cap (68,68a, 70), the electronic unit (94) it is arranged on the radially inner side of multiple end diverter fluid passages (78,78a) and axially move closer to multiple end diverter fluids Passage.

24. motor (20) according to claim 23, (68,68a, 70) define spiral type fluid road wherein the first end cap First axial limit (100,102) in footpath (76), first axial limit exceed winding vertically in the first axial end portion (48) the distal side limit (96,98), and wherein the electronic unit (94) is at least partially disposed on the first axial end portion Between the distal side limit (96,98) of winding (48) and the first axial limit (100,102) of spiral type fluid path (76).

25. motor (20) according to claim 1 or 2, wherein in an axial end portion stator module of motor (20) (24) the distance between the distal side limit (96,98) and the axial limit (100,102) of fluid path (76) are more than in motor (20) the distal side limit (96,98) of axially opposite end stator module (24) and the axial limit of fluid path (76) The distance between (100,102).

26. the motor (20) according to claim 15 or 16, wherein in an axial end portion stator pack of motor (20) The distance between the distal side limit (96,98) of part (24) and the axial limit (100,102) of fluid path (76) are more than in motor (20) the distal side limit (96,98) of axially opposite end stator module (24) and the axial limit of fluid path (76) The distance between (100,102).