CN113320334A - Cooling method for axle assembly of coaxial motor - Google Patents
Cooling method for axle assembly of coaxial motor Download PDFInfo
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- CN113320334A CN113320334A CN202110656331.0A CN202110656331A CN113320334A CN 113320334 A CN113320334 A CN 113320334A CN 202110656331 A CN202110656331 A CN 202110656331A CN 113320334 A CN113320334 A CN 113320334A
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- lubricating oil
- axle
- cavity
- motor
- cooling medium
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- 238000001816 cooling Methods 0.000 title abstract description 38
- 238000009826 distribution Methods 0.000 claims description 48
- 230000007246 mechanism Effects 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims 10
- 239000010687 lubricating oil Substances 0.000 abstract description 124
- 238000010521 absorption reaction Methods 0.000 abstract description 90
- 239000002826 coolant Substances 0.000 abstract description 85
- 230000017525 heat dissipation Effects 0.000 abstract description 44
- 239000003921 oil Substances 0.000 abstract description 25
- 230000009471 action Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 98
- 239000007788 liquid Substances 0.000 description 81
- 239000004744 fabric Substances 0.000 description 14
- 238000005192 partition Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000000110 cooling liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000000576 supplementary effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a cooling method of a coaxial motor axle assembly, wherein a motor rotating shaft drives a centrifugal air pump to rotate, the centrifugal air pump rotates to drive lubricating oil in an axle housing to reach a lubricating oil heat dissipation cavity, the lubricating oil in the lubricating oil heat dissipation cavity flows back to an axle housing, heat is transferred to cooling medium in a lubricating oil heat absorption cavity when the lubricating oil passes through the lubricating oil heat dissipation cavity, the cooling medium in the lubricating oil heat absorption cavity is cooled when flowing through a heat exchanger under the action of a circulating pump, and the cooled cooling medium flows back to the lubricating oil heat absorption cavity again. The invention has the advantage that the lubricating oil circulates in the axle for cooling, and solves the problem that the lubricating oil flowing path is long, which influences the viscosity of the oil and the quality of the lubricating oil, caused by the existing lubricating oil leading out of the axle for cooling.
Description
Technical Field
The invention relates to an axle, in particular to a cooling method of a coaxial motor axle assembly.
Background
The automobile axle is also called as axle, and is connected with the frame or the bearing type automobile body through the suspension, and wheels are arranged at the two ends of the automobile axle. The axle is used for bearing the load of the automobile and maintaining the normal running of the automobile on the road. According to different driving modes, the axle is also divided into a steering axle, a driving axle, a steering driving axle and a supporting axle. Wherein the steering axle and the support axle belong to the driven axle. Most automobiles are front-rear driven, so the front axle is used as a steering axle, the rear axle is used as a driving axle, and the front-drive automobile is used as a steering driving axle, and the rear axle is used as a supporting axle.
In the current axle assembly of the coaxial motor, a water tank is arranged on an axle housing, and then a spray head is used for spraying water outside the motor, so that resources are wasted, and parts with higher temperature are easy to rust when meeting water; in addition, the conventional cooling method for the lubricating oil in the axle housing of the coaxial motor axle assembly is to lead the lubricating oil out of the axle and then cool the lubricating oil in a radiator, and the quality of the lubricating oil is easily reduced due to the long flowing route.
Disclosure of Invention
The invention aims to provide a method for cooling a coaxial motor axle assembly by circulating lubricating oil in an axle, which solves the problem that the lubricating oil quality is influenced by the viscosity of the oil due to the long flowing route of the lubricating oil caused by cooling the existing lubricating oil leading-out axle.
The second purpose of the present invention is to provide a method for cooling a coaxial motor axle assembly that uses a shared lubricating oil cooling structure to cool a driving motor, which solves the disadvantages of the existing water-spraying cooling driving motor.
The technical problem is solved by the following technical scheme: a cooling method of a coaxial motor axle assembly comprises an axle shell, a differential mechanism arranged in the axle shell, a first output half shaft connected with one end of the differential mechanism, a second output half shaft connected with the other end of the differential mechanism and a driving motor connected outside the axle shell, wherein a motor rotating shaft of the driving motor is of a tubular structure and is sleeved on the first output half shaft, a transmission mechanism for transmitting the torque of the motor rotating shaft to the differential mechanism is arranged in the axle shell, one end of the motor rotating shaft extends into the axle shell, the coaxial motor axle assembly is characterized by further comprising a circulating pump, a heat exchanger, a lubricating oil heat dissipation cavity sleeved on the first output half shaft and a lubricating oil heat absorption cavity sleeved on the lubricating oil heat dissipation cavity, the other end of the motor rotating shaft penetrates into the lubricating oil heat dissipation cavity and is butted with an inlet end of a centrifugal air pump, be equipped with in the first output semi-axis along the oil return passageway of first output semi-axis axial extension, the one end of first output semi-axis be equipped with intercommunication oil return passageway with the inlet port of lubricating oil heat dissipation chamber intercommunication, the other end are equipped with the oil outlet of intercommunication oil return passageway and axle casing inner space, constitute the intercommunication for clearance fit between motor shaft and the motor shaft the oil feed passageway of axle casing inner space and centrifugal pump bowl entrance point, lubricating oil heat absorption intracavity is filled with cooling medium, and the part of the wall in lubricating oil heat dissipation chamber keeping apart between lubricating oil heat dissipation chamber and lubricating oil heat absorption chamber is made for the heat conduction material and forms, lubricating oil heat absorption chamber is equipped with lubricating oil heat absorption chamber portion cooling medium import and lubricating oil heat absorption chamber portion cooling medium export, and heat exchanger is equipped with first cooling medium entry of exchanger portion, first cooling medium export of exchanger portion, The lubricating oil heat absorption cavity part cooling medium outlet is connected with the heat exchanger part first medium inlet; the cooling process is as follows: the motor rotating shaft drives the half shaft to rotate so as to drive the centrifugal air pump to rotate in the process of advancing the automobile, the centrifugal air pump rotates to drive lubricating oil in the axle housing to flow into the centrifugal air pump through the oil inlet channel and flow out along the radial direction of the centrifugal air pump to reach the lubricating oil heat dissipation cavity, the lubricating oil in the lubricating oil heat dissipation cavity flows back to the axle housing through the oil inlet hole, the oil return channel and the oil outlet hole, so that internal circulation of the lubricating oil is realized, heat of the lubricating oil is transferred to cooling medium in the lubricating oil heat absorption cavity through the lubricating oil heat dissipation cavity so as to be cooled, the cooling medium in the lubricating oil heat absorption cavity is cooled when flowing through the heat exchanger under the action of the circulating pump, and the cooled cooling medium flows back to the lubricating oil heat absorption cavity again; the cooling process of the heat exchanger is that the low-temperature refrigerant flows in through the second cooling medium inlet of the heat exchanger part and then flows out from the second cooling medium outlet of the heat exchanger part, so that the heat of the cooling medium which flows out from the second cooling medium outlet of the heat exchanger part after flowing in through the first cooling medium inlet of the heat exchanger part, namely the heat of the cooling medium sent by the lubricating oil heat absorption cavity, is taken away. According to the technical scheme, the lubricating oil is internally circulated, so that the fluid circuit is short and the structure is compact. The driving motor for driving the differential mechanism is used for driving to complete the circulation of lubricating oil, so that the structure is more compact.
Preferably, the coaxial motor axle assembly further comprises a motor heat dissipation cavity sleeved on the driving motor and a motor heat absorption cavity sleeved on the motor heat dissipation cavity, the motor heat radiator is filled with insulating heat-conducting media, the cooling medium is filled in the motor heat absorption cavity, the motor heat absorption cavity is provided with a motor heat absorption cavity part cooling medium inlet and a motor heat absorption cavity part cooling medium outlet, the motor heat absorption cavity part cooling medium inlet is also connected with the heat exchanger part first medium outlet, and the motor part cooling medium outlet is also connected with the heat exchanger part first medium inlet; the cooling process comprises the following steps: the heat generated by the motor is transferred to the cooling medium in the motor heat absorption cavity by the insulating heat-conducting medium, the cooling medium in the motor heat absorption cavity is cooled when flowing through the heat exchanger under the action of the circulating pump, and the cooled cooling medium flows back to the motor heat absorption cavity again. This technical scheme has realized driving motor's non-water spray cooling.
Preferably, the axle assembly of the coaxial motor further comprises a three-way valve and a middle annular liquid distribution cavity sleeved on the rotating shaft of the motor, at least two cooling medium outlets of the heat absorption cavity part of the lubricating oil are arranged on the middle annular liquid distribution cavity, the cooling medium outlets of the heat absorption cavity part of the lubricating oil are distributed along the circumferential direction of the middle annular liquid distribution cavity, only the cooling medium outlets of the heat absorption cavity part of the motor are arranged on the middle annular liquid distribution cavity, the middle annular liquid distribution cavity is provided with a plurality of middle annular liquid distribution cavity part cooling medium outlets communicated with the heat absorption cavity of the motor, the three-way valve is provided with a three-way valve part inlet, a three-way valve part first outlet and a three-way valve part second outlet, the cooling medium inlet of the heat absorption cavity part of the lubricating oil is connected with the three-way valve part first outlet, and the cooling medium inlet of the heat absorption cavity part of the motor is connected with the three-way valve part second outlet, the three-way valve portion inlet is connected with the exchanger portion first cooling medium outlet; the cooling process comprises the following steps: when cooling liquid needs to be cooled, the cooling liquid firstly flows through the lubricating oil heat absorption cavity to cool lubricating oil in the lubricating oil heat dissipation cavity, then flows into the motor heat absorption cavity to cool the insulating heat-conducting medium in the motor heat dissipation cavity after passing through the lubricating oil heat absorption cavity part cooling medium inlet, the middle annular liquid distribution cavity and the middle annular liquid distribution cavity part cooling medium outlet, and finally flows out of the motor part cooling medium outlet to reach the heat exchanger to dissipate heat; when the heat of the motor is only dissipated, the cooling liquid flows to the heat absorption cavity of the motor through the cooling medium inlet of the motor, the middle annular liquid distribution cavity and the cooling medium outlet of the middle annular liquid distribution cavity part and then cools the insulating heat-conducting medium in the heat dissipation cavity of the motor, and finally flows out of the cooling medium outlet of the motor part to reach the heat exchanger to dissipate heat. This technical scheme can selectively cool off and preferably guarantee the cooling of lubricating oil. The uniformity of the cooling medium flowing out of the lubricating oil heat absorption cavity and entering the motor cavity is good, and the cooling efficiency can be improved.
Preferably, the middle annular air distribution cavity is located at the radial outer end of the lubricating oil heat absorption cavity, the middle annular air distribution cavity is provided with a plurality of liquid inlet pipes which are distributed along the circumferential direction of the middle annular air distribution cavity and extend radially, outlets of the liquid inlet pipes are communicated with the middle annular air distribution cavity, inlets of the liquid inlet pipes form cooling medium outlets of the lubricating oil heat absorption cavity, and the distance between the inlets of the liquid inlet pipes and the inner circumferential surface of the lubricating oil heat absorption cavity is 5 mm to 10 mm. The cooling medium can flow out of the lubricating oil heat absorption cavity after being subjected to sufficient heat exchange with the lubricating oil. The cooling efficiency can be improved.
Preferably, an annular liquid outlet and liquid distribution cavity is arranged in the motor oil heat absorption cavity, a cooling medium outlet of the motor heat absorption cavity is arranged in the annular liquid outlet and liquid distribution cavity, the annular liquid outlet and liquid distribution cavity is provided with a plurality of annular liquid outlet and liquid distribution cavity cooling medium inlets extending along the circumferential direction of the annular liquid outlet and liquid distribution cavity, the annular liquid outlet and liquid distribution cavity is sleeved on the motor rotating shaft, and the annular liquid outlet and liquid distribution cavity and the motor oil heat absorption cavity cooling medium inlets are circumferentially distributed at two ends of the motor heat absorption cavity along the motor rotating shaft. The static flow area generated by the cooling liquid flowing out of the heat absorption cavity of the motor due to the confluence phenomenon can be avoided, and the reliability and the heat exchange cooling efficiency during cooling are improved.
As preferred, be equipped with annular feed liquor cloth liquid chamber in the lubricating oil heat absorption chamber, lubricating oil heat absorption chamber portion cooling medium import sets up annular feed liquor cloth liquid chamber, annular feed liquor cloth liquid chamber is equipped with a plurality of annular feed liquor cloth liquid chamber portion cooling medium exports that extend along annular feed liquor cloth liquid chamber circumference, annular play liquid cloth liquid chamber cover is established on first output semi-axis, annular feed liquor cloth liquid chamber and lubricating oil heat absorption chamber portion cooling medium export are along first output semi-axis axial distribution at the both ends in lubricating oil heat absorption chamber. The cooling device can avoid the phenomenon of confluence of cooling liquid flowing into the lubricating oil heat absorption cavity to generate a static flow area, and improves the reliability and the heat exchange cooling efficiency during cooling.
Preferably, a partition plate is arranged in the lubricating oil heat dissipation cavity, the partition plate divides the lubricating oil heat dissipation cavity into a first cavity and a second cavity which are distributed along the extending direction of a first output half shaft, the centrifugal pumping cylinder is only located in the first cavity, the oil inlet is located in the second cavity, the first output half shaft is connected with the partition plate through a partition plate bearing, and a plurality of communication holes which are distributed along the circumferential direction of the lubricating oil heat dissipation cavity are formed in the radial outer end of the partition plate. Can improve heat exchange efficiency, avoid not being flowed back to axle casing by the lubricating oil of abundant cooling.
Preferably, the peripheral wall of the first cavity and the end wall of the first cavity at the end far away from the partition are both positioned in the lubricating oil heat absorption cavity. The heat exchange efficiency can be improved.
Preferably, the coaxial motor axle assembly further comprises a bearing inner and outer ring sealing structure, the driving motor further comprises a motor shell, a first bearing and a second bearing, and the motor shell is fixed with one end of the axle shell; the first bearing is positioned in the axle housing body and comprises a first bearing inner ring, a first bearing outer ring and a first bearing rolling body, the first bearing inner ring is sleeved and fixed on a motor rotating shaft in a sealing manner, the first bearing outer ring is provided with a first bearing outer ring part outward flange, the first bearing outer ring part outward flange is detachably fixed with the axle housing body in a sealing manner, and one end of the first bearing outer ring facing the motor housing is connected with one end of the first bearing inner ring facing the motor housing in a sealing manner through a bearing inner ring and bearing outer ring sealing structure; the second bearing is positioned outside the lubricating oil heat dissipation cavity and comprises a second bearing inner ring, a second bearing outer ring and second bearing rolling bodies, the second bearing inner ring is sleeved and fixed on a motor rotating shaft in a sealing mode, a second bearing outer ring is provided with a second bearing outer ring part flanging, the second bearing outer ring part flanging is detachably fixed with the lubricating oil heat dissipation cavity, and one end, facing the driving motor, of the second bearing outer ring and one end, facing the driving motor, of the second bearing inner ring are connected together in a sealing mode through a bearing inner ring and bearing outer ring sealing structure; the end, far away from the axle shell, of the first output half shaft is connected with a lubricating oil heat dissipation cavity through a third bearing, the third bearing comprises a third bearing inner ring, a third bearing outer ring and a third bearing rolling body, the third bearing inner ring is sleeved and fixed on the first output half shaft in a sealing manner, the third bearing outer ring is provided with a third bearing outer ring portion outward flange, the third bearing outer ring portion outward flange is detachably fixed with the lubricating oil heat dissipation cavity in a sealing manner, and one end, far away from the driving motor, of the third bearing outer ring is connected with one end, far away from the driving motor, of the third bearing inner ring through a bearing inner ring and outer ring sealing structure in a sealing manner; the second output semi-axis rotates through the fourth bearing and connects on the axle casing, and the fourth bearing includes fourth bearing inner circle, fourth bearing outer lane and fourth bearing rolling element, and the sealed cover of fourth bearing inner circle is established and is fixed on second output semi-axis, and the fourth bearing outer lane is equipped with fourth bearing outer lane portion flanging, and fourth bearing outer lane portion flanging is together fixed with axle casing seal detachably, and driving motor's one end is kept away from with fourth bearing inner circle to the fourth bearing outer lane one end is passed through bearing inner circle outer lane seal structure sealing connection is in the same place. The bearing of the motor and the bearing for supporting the half shaft can be lubricated by lubricating oil in the axle housing, so that the phenomenon that the bearing is damaged due to forgetting to lubricate in the using process can be avoided. The bearing can also play the effect of sealing the axle housing and prevent that lubricating oil from revealing.
Preferably, bearing seal structure includes sealing washer and annular support board, the sealed cover of interior sealing washer is established and is fixed on the bearing inner race, the annular support board is worn to establish in the bearing inner race and is in the same place with the sealed rigid coupling of bearing inner race, the sealed rigid coupling of the radial inner end of annular support board is in the same place with the radial outer end of elastic sealing ring, elastic sealing ring includes the base ring and along the first annular elastic sealing lip and the second annular elastic sealing lip of elastic sealing ring's axial distribution, and the annular seal ditch is formed in the enclosing of first annular elastic sealing lip and first annular elastic sealing lip, and the opening width of annular seal ditch diminishes from the open end of annular seal ditch to the low end gradually, first annular elastic sealing lip and second annular elastic sealing lip all seal the butt on the outer peripheral face of sealing washer. The technical scheme is good in sealing reliability, and after the elastic sealing ring and the sealing ring are worn due to long-term use, the two sealing plates of the elastic sealing ring generate the supplementary action of the elastic sealing ring so as to continuously maintain reliable sealing.
Preferably, the outer peripheral surface of the sealing ring is provided with a sealing convex ring extending along the circumferential direction of the sealing ring, the sealing convex ring is arranged in the annular sealing groove in a penetrating mode, when the first annular elastic sealing lip and the second annular elastic sealing lip are worn to lose sealing effect with the circumferential surface of the sealing ring, the first annular elastic sealing lip and the second annular elastic sealing lip can be in sealing butt joint with the two axial ends of the sealing convex ring under the action of self elasticity. Can pass through the life of bearing seal structure.
The invention has the following advantages: the lubricating oil can be cooled in a lubricating oil internal circulation mode, so that the mileage of the upper end of the lubricating oil flowing away is small, and the service life of the lubricating oil is shortened due to the influence of a flow passage on the viscosity of the lubricating oil; non-water-spraying cooling of the driving motor is realized.
Drawings
FIG. 1 is a schematic structural view of a coaxial motor axle assembly of the present invention;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
FIG. 3 is an enlarged schematic view of a bearing seal structure;
fig. 4 is a partially enlarged schematic view of a portion a of fig. 2.
In the figure: the axle housing 1, the differential 2, the first output half shaft 3, the second output half shaft 4, the driving motor 5, the bearing inner and outer ring sealing structure 6, the motor housing 7, the motor rotating shaft 8, the first bearing 9, the second bearing 10, the transmission mechanism 11, the first bearing outer ring part flanging 12, the lubricating oil heat dissipation cavity 13, the second bearing outer ring part flanging 14, the circulating pump 15, the heat exchanger 16, the lubricating oil heat absorption cavity 17, the centrifugal air pump cylinder 18, the oil return channel 19, the oil inlet hole 20, the oil outlet pipe 21, the elbow 22, the oil return hole 23, the part 24 of the wall of the lubricating oil heat dissipation cavity, which is isolated between the lubricating oil heat dissipation cavity and the lubricating oil heat absorption cavity, the lubricating oil heat absorption cavity cooling medium inlet 25, the lubricating oil heat absorption cavity cooling medium outlet 26, the exchanger first cooling medium inlet 27, the exchanger first cooling medium outlet 28, the heat exchanger second cooling medium inlet 29, A heat exchanger part second cooling medium outlet 30, a motor heat dissipation cavity 31, a motor heat absorption cavity 32, a motor heat absorption cavity cooling medium inlet 33, a motor heat absorption cavity cooling medium outlet 34, a three-way valve 35, a middle annular liquid distribution cavity 36, a middle annular liquid distribution cavity cooling medium outlet 37, a liquid inlet pipe 39, an annular liquid outlet distribution cavity 40, an annular liquid outlet distribution cavity cooling medium inlet 41, an annular liquid inlet distribution cavity 42, an annular liquid inlet distribution cavity cooling medium outlet 43, a partition plate 44, a first cavity 45, a second cavity 46, a partition plate part bearing 47, a communication hole 48, a first cavity peripheral wall 49, a first cavity end wall 50 far away from one end of the partition plate, a third bearing 51, a third bearing outer ring part flanging 52, a fourth bearing 53, a fourth bearing outer ring part flanging 54, a sealing ring 55, an annular supporting plate 56, a base ring 57, a first annular elastic sealing lip 58, a second sealing lip, a third bearing 51, a third bearing outer ring part flanging 52, a third bearing outer ring part flanging 54, a second bearing outer ring part, a second sealing lip part, a third bearing outer ring part, a second cavity outer ring part, a third bearing outer ring part and a second cavity outer ring part, A second annular elastic sealing lip 59, an annular sealing groove 60 and a sealing convex ring 61.
Detailed Description
The invention is further described with reference to the following figures and examples.
A cooling method of a coaxial motor axle assembly is suitable for cooling the coaxial motor axle assembly disclosed with reference to fig. 1 to fig. 3, and the coaxial motor axle assembly comprises an axle housing 1, a differential mechanism 2 arranged in the axle housing, a first output half shaft 3 connected to one end of the differential mechanism, a second output half shaft 4 connected to the other end of the differential mechanism, a driving motor 5 connected to the outside of the axle housing, and a plurality of bearing inner and outer ring sealing structures 6. The driving motor comprises a motor shell 7, a motor rotating shaft 8, a first bearing 9 and a second bearing 10. The motor rotating shaft is of a tubular structure and is sleeved on the first output half shaft. A transmission mechanism 11 for transmitting the torque of the motor rotating shaft to a differential is arranged in the axle housing. The motor shell is fixed with one end of the axle shell; the first bearing is positioned in the axle housing body and comprises a first bearing inner ring, a first bearing outer ring and a first bearing rolling body, the first bearing inner ring is sleeved and fixed on a motor rotating shaft in a sealing manner, the first bearing outer ring is provided with a first bearing outer ring part flanging 12, the first bearing outer ring part flanging is detachably fixed with the axle housing body in a sealing manner, and one end of the first bearing outer ring facing the motor housing is connected with one end of the first bearing inner ring facing the motor housing in a sealing manner through a bearing inner ring and bearing outer ring sealing structure 6; the second bearing is located lubricating oil heat dissipation chamber 13 outsidely, and the second bearing includes second bearing inner circle, second bearing outer lane and second bearing rolling element, and the sealed cover of second bearing inner circle is established and is fixed in the motor shaft, and the second bearing outer lane is equipped with second bearing outer lane portion flanging 14, and second bearing outer lane portion flanging is together fixed with lubricating oil heat dissipation chamber detachably, and the one end of second bearing outer lane towards driving motor is through one with the one end of second bearing inner circle towards driving motor the bearing inner circle seal structure 6 sealing connection is in the same place. One end of the motor rotating shaft extends into the axle shell. The invention also comprises a circulating pump 15, a heat exchanger 16, a lubricating oil heat dissipation cavity 13 sleeved on the first output half shaft and a lubricating oil heat absorption cavity 17 sleeved on the lubricating oil heat dissipation cavity. The other end of the motor rotating shaft penetrates through the lubricating oil heat dissipation cavity and is connected with the inlet end of the centrifugal suction cylinder 18. Be equipped with in the first output semi-axis along the oil return passageway 19 of first output semi-axis axial extension, the one end of first output semi-axis is equipped with the inlet port 20 that intercommunication oil return passageway and lubricating oil heat dissipation chamber communicate, the other end is equipped with the oil outlet that docks together with oil pipe 21 that communicates oil return passageway and axle casing inner space, the one end of keeping away from first output semi-axis of oil pipe is equipped with the elbow 22 of buckling towards keeping away from driving motor, be equipped with oil return hole 23 on the terminal surface of elbow, this setting makes the lubricating oil portion that flows back to the axle casing produce easily and is inhaled the phenomenon production in the drive pivot, the cooling effect is good. The motor rotating shaft and the motor rotating shaft are in clearance fit to form an oil inlet channel for communicating the inner space of the axle shell with the inlet end of the centrifugal air pumping cylinder, a cooling medium is filled in the lubricating oil heat absorption cavity, and the part 24 of the wall of the lubricating oil heat dissipation cavity, which is isolated between the lubricating oil heat dissipation cavity and the lubricating oil heat absorption cavity, is made of a heat conduction material. The lubricating oil heat absorption cavity is provided with a lubricating oil heat absorption cavity cooling medium inlet 25 and a lubricating oil heat absorption cavity cooling medium outlet 26, the heat exchanger is provided with an exchanger portion first cooling medium inlet 27, an exchanger portion first cooling medium outlet 28, a heat exchanger portion second cooling medium inlet 29 and a heat exchanger portion second cooling medium outlet 30, the lubricating oil heat absorption cavity cooling medium inlet is connected with the heat exchanger portion first medium outlet, the lubricating oil heat absorption cavity cooling medium outlet is connected with the heat exchanger portion first medium inlet, and the circulating pump is used for enabling cooling medium to circulate between the heat exchanger and the lubricating oil heat absorption cavity.
The invention also comprises a motor heat dissipation cavity 31 sleeved on the driving motor and a motor heat absorption cavity 32 sleeved on the motor heat dissipation cavity, wherein the motor heat dissipation cavity is filled with insulating heat-conducting media, the cooling media are also filled in the motor heat absorption cavity, the motor heat absorption cavity is provided with a motor heat absorption cavity part cooling media inlet 33 and a motor heat absorption cavity part cooling media outlet 34, the motor heat absorption cavity part cooling media inlet is also connected with the heat exchanger part first media outlet, the motor part cooling media outlet is also connected with the heat exchanger part first media inlet, and the circulating pump is also used for circulating the cooling media between the heat exchanger and the lubricating oil heat absorption cavity. The invention also comprises a three-way valve 35 and a middle annular liquid distribution cavity 36 sleeved on the motor rotating shaft. At least two cooling medium outlets of the lubricating oil heat absorption cavity part are arranged on the middle annular liquid distribution cavity, the cooling medium outlets of the lubricating oil heat absorption cavity part are distributed along the circumferential direction of the middle annular liquid distribution cavity, and the cooling medium outlets of the motor heat absorption cavity part are only arranged on the middle annular liquid distribution cavity. The middle annular liquid distribution chamber is provided with a plurality of middle annular liquid distribution chamber part cooling medium outlets 37 communicated with the motor heat absorption chamber, the three-way valve is provided with a three-way valve part inlet, a three-way valve part first outlet and a three-way valve part second outlet, the lubricating oil heat absorption chamber part cooling medium inlet is connected with the three-way valve part first outlet, the motor heat absorption chamber part cooling medium inlet is connected with the three-way valve part second outlet, and the three-way valve part inlet is connected with the exchanger part first cooling medium outlet through the circulating pump. When the cooling device is used, the second cooling medium inlet 29 of the heat exchanger part is connected with a cold air outlet of an air conditioner of an automobile, and the second cooling medium outlet of the heat exchanger part is connected with an air inlet of an internal circulation of the air conditioner. The middle annular air distribution cavity is located at the radial outer end of the lubricating oil heat absorption cavity, the middle annular air distribution cavity is provided with a plurality of liquid inlet pipes 39 which are distributed along the circumferential direction of the middle annular air distribution cavity and extend radially, the outlets of the liquid inlet pipes are communicated with the middle annular air distribution cavity, the inlets of the liquid inlet pipes form cooling medium outlets of the lubricating oil heat absorption cavity, and the distance between the inlets of the liquid inlet pipes and the inner circumferential surface of the lubricating oil heat absorption cavity is 5 mm to 10 mm.
An annular liquid outlet cloth liquid cavity 40 is arranged in the motor oil heat absorption cavity, a cooling medium outlet of the motor heat absorption cavity is arranged in the annular liquid outlet cloth liquid cavity, a plurality of annular liquid outlet cloth liquid cavity cooling medium inlets 41 extending along the circumferential direction of the annular liquid outlet cloth liquid cavity are arranged in the annular liquid outlet cloth liquid cavity, the annular liquid outlet cloth liquid cavity is sleeved on a motor rotating shaft, and the annular liquid outlet cloth liquid cavity and the cooling medium inlets of the motor oil heat absorption cavity are circumferentially distributed at two ends of the motor heat absorption cavity along the motor rotating shaft.
An annular liquid inlet liquid distribution cavity 42 is formed in the lubricating oil heat absorption cavity, a cooling medium inlet of the lubricating oil heat absorption cavity is formed in the annular liquid inlet liquid distribution cavity, a plurality of annular liquid inlet liquid distribution cavity cooling medium outlets 43 extending along the circumferential direction of the annular liquid inlet liquid distribution cavity are formed in the annular liquid inlet liquid distribution cavity, the annular liquid outlet liquid distribution cavity is sleeved on a first output half shaft, and the annular liquid inlet liquid distribution cavity and the lubricating oil heat absorption cavity cooling medium outlets are axially distributed at two ends of the lubricating oil heat absorption cavity along the first output half shaft. The lubricating oil heat dissipation intracavity is equipped with baffle 44, and the baffle is cut apart into along first output semi-axis extending direction distributed first cavity 45 and second cavity 46 with lubricating oil heat dissipation chamber, and the centrifugal pump bowl only is located the first cavity, and the oil inlet is located the second cavity, and first output semi-axis links together with the baffle through baffle portion bearing 47, and the radial outer end of baffle is equipped with a plurality of intercommunicating pores 48 along lubricating oil heat dissipation chamber circumference distribution. The peripheral wall 49 of the first chamber and the end wall 50 of the first chamber at the end remote from the partition are both located within the lubricant heat absorption chamber. One end, far away from the axle shell, of the first output half shaft is connected with a second cavity of the lubricating oil heat dissipation cavity through a third bearing 51, the third bearing comprises a third bearing inner ring, a third bearing outer ring and a third bearing rolling body, the third bearing inner ring is sleeved and fixed on the first output half shaft in a sealing manner, the third bearing outer ring is provided with a third bearing outer ring outward flange 52, the third bearing outer ring outward flange is fixed with the lubricating oil heat dissipation cavity in a sealing and detachable manner, and one end, far away from the driving motor, of the third bearing outer ring and one end, far away from the driving motor, of the third bearing inner ring are connected together in a sealing manner through a bearing inner ring and outer ring sealing structure; the second output semi-axis rotates through fourth bearing 53 and connects on the axle casing, and the fourth bearing includes fourth bearing inner circle, fourth bearing outer lane and fourth bearing rolling element, and the sealed cover of fourth bearing inner circle is established and is fixed on second output semi-axis, and the fourth bearing outer lane is equipped with fourth bearing outer lane portion flanging 54, and fourth bearing outer lane portion flanging is together fixed with axle casing seal detachably, and driving motor's one end is kept away from with fourth bearing inner circle to the fourth bearing outer lane one end is passed through bearing inner circle outer lane seal structure sealing connection is in the same place. The bearing sealing structure comprises a sealing ring 55 and an annular supporting plate 56, the inner sealing ring is sleeved and fixed on the bearing inner ring in a sealing manner (for example, in an adhesive manner), and the annular supporting plate is arranged in the bearing inner ring in a penetrating manner and is fixedly connected with the bearing inner ring in a sealing manner. The radial inner end of the annular supporting plate is fixedly connected with the radial outer end of the elastic sealing ring in a sealing mode, the elastic sealing ring comprises a base ring 57, a first annular elastic sealing lip 58 and a second annular elastic sealing lip 59 which are distributed along the axial direction of the elastic sealing ring, an annular sealing groove 60 is formed by the first annular elastic sealing lip and the first annular elastic sealing lip in a surrounding mode, the opening width of the annular sealing groove is gradually reduced from the opening end of the annular sealing groove to the lower end, and the first annular elastic sealing lip and the second annular elastic sealing lip are connected on the outer peripheral face of the sealing ring in a sealing and abutting mode. The outer peripheral face of the sealing ring is provided with a sealing convex ring 61 extending along the circumferential direction of the sealing ring, the sealing convex ring is arranged in the annular sealing groove in a penetrating mode, when the first annular elastic sealing lip and the second annular elastic sealing lip are worn to the circumferential face of the sealing ring and lose sealing effect, the first annular elastic sealing lip and the second annular elastic sealing lip can be in sealing butt joint with the two axial ends of the sealing convex ring under the action of self elasticity.
Claims (8)
1. The utility model provides an axle king pin hole endotheca detection mechanism, its characterized in that, includes internal diameter detection structure and from the top down sets gradually presses structure, layer board and bottom plate, internal diameter detection structure includes compares the disc down, compares disc and drive down and compares disc pivoted revolution mechanic, the diameter of comparing the disc down is the lower limit value of endotheca internal diameter, the diameter of comparing the disc on going up is the upper limit value of endotheca internal diameter, the lower extreme of comparing the disc down is equipped with supports on the bottom plate and rotates the vertical pivot axle of connecting on the layer board, the upper end is equipped with vertical connecting hole, compare the disc down and wear to be equipped with 3 at least along vertical pivot axle circumference distribution radial extension's ejector pins, rotary mechanism includes setting up at vertical pivot epaxial gear, with the rack that the gear meshing is in the same place and the translation mechanism that drives the rack and come and go the translation, the lower extreme of comparing the disc is equipped with can pull out ground and wear to establish the vertical connecting axle in the vertical connecting hole, the vertical connecting shaft is provided with a conical surface section, the lower end of the conical surface section is small, the upper end of the conical surface section is large, the conical surface section is used for being abutted with the ejector rod and is used for driving the ejector rod to abut against an inner sleeve sleeved on a lower comparison disc, one end of the ejector rod is provided with an elastic layer, the pressing structure comprises a pressing plate and a lifting mechanism for driving the pressing plate to press the upper comparison disc, a base plate is supported on the supporting plate through a spring, a fixed stop block and a movable stop block are arranged on the base plate, an inner sleeve wall thickness comparison channel is formed between the fixed stop block and the movable stop block, the upper end of the inner sleeve wall thickness comparison channel is provided with an introducing port, the fixed stop block and the movable stop block are distributed along the radial direction of the vertical rotating shaft, the movable stop block is connected to the supporting plate in a sliding mode along the radial direction of the rotating shaft, and a movable stop block position adjusting mechanism is arranged on the supporting plate; when the inner sleeve with the inner diameter and the wall thickness both meeting the design values is sleeved on the lower comparison disc, the wall of the inner sleeve can be inserted into the inner sleeve wall thickness comparison channel.
2. The axle kingpin bore liner detection mechanism of claim 1, wherein a sum of an inner diameter of the liner plus one half of a wall thickness of the liner is equal to a distance of the wall thickness of the liner from an axis of the vertical axis relative to a midpoint of the channel.
3. The axle kingpin hole inner sleeve detection mechanism of claim 1, wherein the movable stop position adjustment mechanism comprises a rotary plate abutting against a side of the movable stop remote from the fixed stop, the rotary plate being eccentrically provided with a vertical rotation shaft, the vertical rotation shaft being threadedly coupled to the support plate.
4. The axle kingpin hole inner sleeve detection mechanism of claim 1, wherein the fixed stop is positioned between the vertical shaft and the movable stop, and the movable stop position adjustment mechanism is positioned on a side of the movable stop remote from the fixed stop.
5. The axle kingpin hole inner sleeve detection mechanism of claim 1, wherein the fixed stop is located between the vertical shaft and the movable stop, the fixed stop is cylindrical, and a surface of the movable stop facing the fixed stop is a vertical plane perpendicular to a radial direction of the vertical shaft.
6. The axle kingpin bore liner detection mechanism of claim 1, wherein the resilient layer is a rubber layer.
7. The axle kingpin bore liner detection mechanism of claim 1, wherein the vertical shaft is supported on the base plate via a flat bearing.
8. The axle kingpin hole liner detection mechanism of claim 1, wherein the lower surface of the pressing plate is provided with a plurality of pressing balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110656331.0A CN113320334B (en) | 2021-06-12 | 2021-06-12 | Cooling method for coaxial motor axle assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110656331.0A CN113320334B (en) | 2021-06-12 | 2021-06-12 | Cooling method for coaxial motor axle assembly |
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| CN113320334A true CN113320334A (en) | 2021-08-31 |
| CN113320334B CN113320334B (en) | 2023-07-07 |
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| CN202110656331.0A Active CN113320334B (en) | 2021-06-12 | 2021-06-12 | Cooling method for coaxial motor axle assembly |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6345712B1 (en) * | 2000-06-09 | 2002-02-12 | Dana Corporation | Axle assembly with liquid cooled brake |
| CN110329005A (en) * | 2019-08-21 | 2019-10-15 | 湖北车桥有限公司 | A kind of coaxial motor axle assembly with cooling device |
-
2021
- 2021-06-12 CN CN202110656331.0A patent/CN113320334B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6345712B1 (en) * | 2000-06-09 | 2002-02-12 | Dana Corporation | Axle assembly with liquid cooled brake |
| CN110329005A (en) * | 2019-08-21 | 2019-10-15 | 湖北车桥有限公司 | A kind of coaxial motor axle assembly with cooling device |
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| Publication number | Publication date |
|---|---|
| CN113320334B (en) | 2023-07-07 |
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Address after: 354209 No. 176 Renmin Road, Shui Ji Town, Jianyang District, Nanping, Fujian Applicant after: Fujian Tiechima Light Axle Co.,Ltd. Address before: 354209 No. 176 Renmin Road, Shui Ji Town, Jianyang District, Nanping, Fujian Applicant before: NANPING JIANYANG AUTO PRESS FORGING FACTORY |
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Denomination of invention: Cooling method for coaxial motor axle assembly Effective date of registration: 20231017 Granted publication date: 20230707 Pledgee: Industrial and Commercial Bank of China Limited Jianyang Branch Pledgor: Fujian Tiechima Light Axle Co.,Ltd. Registration number: Y2023980061378 |
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