CN112644262A - Double-motor electric drive axle of belt wheel side speed reducer - Google Patents

Double-motor electric drive axle of belt wheel side speed reducer Download PDF

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Publication number
CN112644262A
CN112644262A CN202110018630.1A CN202110018630A CN112644262A CN 112644262 A CN112644262 A CN 112644262A CN 202110018630 A CN202110018630 A CN 202110018630A CN 112644262 A CN112644262 A CN 112644262A
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CN
China
Prior art keywords
gear
transmission
speed reduction
reduction module
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110018630.1A
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Chinese (zh)
Inventor
刘国庆
孔卓
张庆鹏
李彬
赵飞翔
许电波
王坤玉
徐秀良
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Sinotruk Jinan Power Co Ltd
Original Assignee
Sinotruk Jinan Power Co Ltd
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Publication date
Application filed by Sinotruk Jinan Power Co Ltd filed Critical Sinotruk Jinan Power Co Ltd
Priority to CN202110018630.1A priority Critical patent/CN112644262A/en
Publication of CN112644262A publication Critical patent/CN112644262A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K1/02Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K17/00Arrangement or mounting of transmissions in vehicles
    • B60K17/04Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K17/00Arrangement or mounting of transmissions in vehicles
    • B60K17/04Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • B60K17/165Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles

Abstract

The application provides a double-motor electric drive axle with a wheel-side reducer, which relates to the technical field of new energy automobiles and comprises a first drive motor, a second drive motor, an axle shell, a planet carrier, a first half shaft, a second half shaft and a differential mechanism, wherein the first drive motor and the second drive motor are respectively arranged at two sides of the axle shell, two sets of drive motor modules distributed at two sides of an axle are connected with a two-gear shifting module of a common axle assembly module through a transmission module, power is distributed to the two half shafts through the differential mechanism after planetary reduction and is finally transmitted to wheels through the wheel-side reducer, the motor distributed drive and power transmission coupling can be realized, and compared with single motor drive, the load factor of the motor is increased, the running efficiency of the motor is improved, and the power assembly is reduced, the development cost is reduced.

Description

Double-motor electric drive axle of belt wheel side speed reducer
Technical Field
The application relates to the technical field of new energy vehicles, in particular to a double-motor drive axle of a belt wheel side speed reducer.
Background
At present, new energy commercial uses car electric drive axle mostly adopts electric motor car single motor matching AMT gearbox, single motor matching reduction gear, bi-motor matching reduction gear and bi-motor matching AMT gearbox scheme, and mostly is single motor scheme, and its system integration is lower, specifically embodies: the power assembly occupies a large space and is large in weight, a single motor considers large design allowance for meeting complex working conditions, a large-power motor is adopted, and during operation under most actual conditions, the required power is small, so that the actual load rate of the motor is at a low level, the driving motor runs in a low-efficiency area for a long time, and the energy consumption of the whole vehicle is high. The double-motor matching scheme mainly takes a wheel-side motor as a main part, has no central differential, and has poor stability and serious tire abrasion for the electric vehicle which is high in speed and frequently turns. And adopt two motors to match AMT scheme and do not appear popularizing and applying in batches yet at present, and most adopt two sets of motors to match two sets of AMT modes respectively, and weight is great, shift reliability poor and the system control degree of difficulty is high.
Disclosure of Invention
To the problem that exists among the prior art, this application provides a band pulley limit reduction gear bi-motor drive axle to realize the different couplings of drive power under different speed of a motor vehicle, different loads, realize the real-time distribution of power, and bi-motor sharing two keep off shifts gears, can further improve motor output torque and motor work in the high efficiency interval when guaranteeing to shift the reliability, improve the beneficial effect of whole car dynamic nature, economic nature.
The application provides a double-motor drive axle of a belt wheel side speed reducer, which comprises a first drive motor, a second drive motor, an axle shell, a planet carrier, a first half shaft, a second half shaft and a differential mechanism, wherein the first drive motor and the second drive motor are respectively arranged at two sides of the axle shell; the second driving motor is connected with the third gear transmission speed reduction module through the lower first gear transmission speed reduction module and the lower second gear transmission speed reduction module in sequence; the third gear transmission speed reduction module is connected with a sun gear of the planetary speed reduction module in the axle housing through the speed change gear shifting module, the planet carrier is connected with the differential case, the differential case is respectively connected with the first half shaft and the second half shaft, the first half shaft is connected with the first wheel through the wheel reduction gear, and the second half shaft is connected with the second wheel through the wheel reduction gear.
Further, the speed changing and shifting module is connected with a sun gear in the planetary speed reducing module through a middle shaft; the third gear transmission speed reduction module comprises two pairs of opposite gear modules which are sleeved on the intermediate shaft in an empty mode, and the gear module is driven to be meshed with the intermediate shaft.
The device further comprises a differential bearing piece, a planet speed reduction module bearing piece, a wheel side speed reduction module bearing piece and a speed reduction transmission mechanism bearing piece;
the differential is fixed on the axle housing through a differential carrier;
the gear ring of the planetary reduction module is fixed on a planetary reduction module bearing piece, the planetary reduction module bearing piece is fixedly connected with the axle shell, and the gear ring of the planetary reduction module supports the sun gear and the planet gear system to concentrically rotate with the differential mechanism in the axle shell;
the wheel-side deceleration module comprises a wheel-side deceleration module I and a wheel-side deceleration module II, the wheel-side deceleration module is fixed on a wheel-side deceleration module bearing piece, the wheel-side deceleration module bearing piece is fixed on the axle shell and supports a sun gear and a planetary gear train of the wheel-side deceleration module to rotate inside;
the speed reduction transmission mechanism bearing piece and the gear shifting module are fixed on the axle shell through bearings;
the differential bearing piece, the planet speed reduction module bearing piece and the wheel side speed reduction module bearing piece are all integrated stamping and welding pieces.
Further, the upper first gear transmission speed reduction module comprises a first transmission gear, and the first transmission gear is mounted on a first shaft; the lower first reduction gear module comprises a second transmission gear, and the second transmission gear is arranged on a second shaft; and the first transmission gear and the second transmission gear are respectively connected with the second gear transmission speed reduction module.
Furthermore, the second gear transmission speed reduction module comprises a second gear transmission speed reduction module I and a second gear transmission speed reduction module II; the second gear transmission speed reduction module I comprises a third transmission gear, a fourth transmission gear and a third shaft; the second gear transmission speed reduction module II comprises a fifth transmission gear and a fourth shaft; the third transmission gear is meshed with the first transmission gear, the fifth transmission gear is meshed with the second transmission gear, and the second gear transmission speed reduction module I and the second gear transmission speed reduction module II are both meshed with the third gear transmission speed reduction module.
Furthermore, the second gear transmission speed reduction module comprises a second gear transmission speed reduction module I and a second gear transmission speed reduction module II; the second gear transmission speed reduction module I comprises an eighth transmission gear, a ninth transmission gear, a tenth transmission gear and a seventh shaft, and the second gear transmission speed reduction module II comprises an eleventh transmission gear, a twelfth transmission gear and an eighth shaft; the eighth transmission gear is meshed with the first transmission gear, the eleventh transmission gear is meshed with the second transmission gear, and the second gear transmission speed reduction module I and the second gear transmission speed reduction module II are both meshed with the third gear transmission speed reduction module.
Furthermore, the third gear transmission speed reduction module comprises a sixth transmission gear and a seventh transmission gear, the sixth transmission gear is installed on a fifth shaft, the seventh transmission gear is installed on a sixth shaft, and the fifth shaft and the sixth shaft are respectively fixed on the axle shell through bearings; the fifth shaft and the sixth shaft are concentric but not connected; a gear shifting joint sleeve is arranged between the sixth transmission gear and the seventh transmission gear, the gear shifting joint sleeve is meshed with an external spline of the intermediate shaft through an internal spline, and the sixth transmission gear and the seventh transmission gear are in sliding connection with the intermediate shaft.
Furthermore, the planetary reduction module comprises a sun gear, a planet carrier and a planet gear ring gear, the sun gear is connected with the intermediate shaft through a key, and the planet gear ring gear is fixed on the axle shell.
Furthermore, differential mechanism includes planetary gear, side gear, planet gear axle and differential mechanism shell, side gear respectively with correspond semi-axis fixed connection or integrated into one piece, the planet carrier links to each other with the differential mechanism shell.
Furthermore, the planetary reduction module comprises a first sun gear, a second sun gear, a first planetary gear set, a second planetary gear set, a first sun gear ring gear and a second sun gear ring gear, wherein the first sun gear is connected with the first half shaft, the second sun gear is connected with the second half shaft, the first sun gear ring gear, the second sun gear ring gear and the axle shell are fixedly connected, and the first sun gear ring gear, the second sun gear ring gear and the axle shell are fixedly connected.
The beneficial effect of this application lies in:
according to the double-motor electric drive axle of the belt wheel side speed reducer, two sets of driving motor systems are matched to share one AMT gearbox, so that different coupling of driving force under different speeds and different loads is realized, real-time power distribution is realized, double motors work simultaneously when the vehicle is accelerated suddenly, overtaking and climbing, and the dynamic property of the whole vehicle is improved; the single motor is driven under the common working condition, so that the load rate of the motor is improved, the working high-efficiency area of the motor is optimized, and the economy of the whole vehicle is improved; the dual-motor configuration can still ensure the normal running function of one group of motors when the motors fail, thereby improving the safety of the whole vehicle; the dual motors share two gears for gear shifting, the gear shifting reliability is guaranteed, meanwhile, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved, and the power economy is improved.
In addition, the design principle of the application is reliable, the structure is simple, and the application prospect is very wide.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-motor electric drive axle of a pulley edge reducer according to an embodiment of the present application.
FIG. 2 is a schematic diagram of a transmission reduction module according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a second gear reduction module according to an embodiment of the present application.
FIG. 4 is a schematic view of the interior of the axle housing mid-axle in one embodiment of the present application.
FIG. 5 is a first schematic view of the inner structure of the wheel rim of the axle housing in accordance with an embodiment of the present application.
FIG. 6 is a second schematic view of an interior configuration of an axle housing wheel rim according to an embodiment of the present application.
FIG. 7 is a schematic view of a dual-motor electric drive axle assembly of a pulley-edge reducer according to an embodiment of the present application.
Fig. 8 is a schematic diagram of the operation mode of the dual-motor electric drive axle of the pulley edge reducer according to one embodiment of the present application.
In the figure, 1, a first driving motor, 2, an upper first gear transmission speed reducing module, 3, an upper second gear transmission speed reducing module, 4, a third gear transmission speed reducing module, 5, a planetary speed reducing module, 6, a differential mechanism, 7, a first half shaft, 8, a first wheel, 9, a wheel edge speed reducing module I, 10, an intermediate shaft, 11, a gear shifting module, 12, a lower second gear transmission speed reducing module, 13, a lower first gear transmission speed reducing module, 14, a second half shaft, 15, a second driving motor, 16, a wheel edge speed reducing module II, 17, a second wheel, 18, a driving motor module, 19, a transmission module, 20, an axle assembly module, 2-1, a first transmission gear, 2-2, a first shaft, 3-0, an eighth transmission gear, 3-1, a third transmission gear, 3-2 and a fourth transmission gear, 3-3 parts of a third shaft, 4-1 parts of a sixth transmission gear, 4-2 parts of a seventh transmission gear, 4-3 parts of a sixth shaft, 4-4 parts of a fifth shaft, 5-1 parts of a first sun gear, 5-2 parts of a first planet carrier, 5-3 parts of a first planet gear ring gear, 6-1 parts of a differential case, 9-1 parts of a second sun gear, 9-2 parts of a second planet carrier, 9-3 parts of a second sun gear ring gear, 12-1 parts of a fifth transmission gear, 12-2 parts of a fourth shaft, 13-1 parts of a second transmission gear, 13-2 parts of a second shaft, 16-1 parts of a third sun gear, 16-2 parts of a third planet carrier, 16-3 parts of a third sun gear ring gear.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following explains key terms appearing in the present application.
As shown in fig. 1 to 6, the present application provides a dual-motor electric drive axle of a pulley edge reducer, which includes a first drive motor 1, a second drive motor 15, an axle housing, a planet carrier, a first half shaft 7, a second half shaft 14, and a differential 6. The first driving motor 1 and the second driving motor 15 are respectively arranged at two sides of the axle housing, the differential mechanism 6 is fixed on the axle housing, and the two half shafts are respectively fixed on the axle housing through the differential mechanism 6.
The first driving motor 1 is connected with a third gear transmission speed reduction module 4 sequentially through an upper first gear transmission speed reduction module 2 and an upper second gear transmission speed reduction module 3 which are on the same side; the third gear transmission speed reduction module 4 is connected with a sun gear of the planetary speed reduction module 5 in the axle housing through the gear shifting module 11, the planet carrier is connected with a differential case 6-1, the differential case 6-1 is respectively connected with a first half shaft 7 and a second half shaft 14, the first half shaft 7 is connected with a first wheel 8 through a wheel reduction gear, and the second half shaft 14 is connected with a second wheel 17 through a wheel reduction gear.
The gear shifting module 11 is connected with a sun gear in the planetary speed reducing module 5 through an intermediate shaft 10; the third gear transmission reduction module 4 comprises two pairs of opposite gear modules which are sleeved on the intermediate shaft 10 in an empty mode, and the gear module 11 drives the gear modules to be meshed with the intermediate shaft 10. The intermediate shaft 10 is directly connected with the sun gear of the planetary reduction module 5, the gear ring of the planetary reduction module 5 is fixed with the axle shell, the output of the planet carrier is directly connected with the differential shell 6-1 of the differential mechanism 6, the power is distributed to two half shafts under the action of the differential mechanism 6, and finally the power is transmitted to wheels through the planetary speed reducer respectively.
And the second driving motor 15 is connected with the third gear transmission speed reduction module 4 sequentially through the lower first gear transmission speed reduction module 13 and the lower second gear transmission speed reduction module 12 which are on the same side. The configuration of one side of the second driving motor 15 is the same as that of one side of the first driving motor 1, and the power output sequentially passes through the lower first gear transmission speed reducing module 13 and the lower second gear transmission speed reducing module 12 to transmit the power to the third gear transmission speed reducing module 4, and is merged with the power of the first driving motor 1.
The first driving motor 1 and the second driving motor 15 are identical in structure and respectively comprise a rotor capable of rotating around an axis, the rotor can be connected with a first shaft 2-2 and a second shaft 13-2 of the first gear transmission speed reduction module through splines, and the power output ends of the stator and the shell motor are provided with threaded holes and connected with a speed reduction transmission mechanism bearing piece module through bolts. The driving motor is provided with a set of active cooling liquid cooling system, which comprises a cooling water channel, and the cooling driving part can drive cooling liquid to circularly flow. The position of the driving motor relative to the first transmission speed reducing module can be arranged on one side of the first shaft 2-2 and the second shaft 13-2 as shown in figure 2, and can also be arranged on the other side to be connected with the shaft 2-2 and the shaft 13-2 through splines.
The first driving motor 1 is a main driving motor, the power torque of the first driving motor is more than or equal to that of the second driving motor 15, and the first driving motor is mainly used for basic working conditions such as level road starting, slow acceleration, medium-low speed running and the like; the second driving motor 15 is an auxiliary driving motor, and is mainly used for power supplement and providing auxiliary power for the vehicle, such as climbing, starting and accelerating, overtaking, high speed, braking energy recovery and the like. Through motor coupling and gear shifting, several different operating modes can be realized as shown in fig. 8.
The motor is a main driving motor, the motor is an auxiliary driving motor, and the positions of the main driving motor and the auxiliary driving motor can be interchanged; the first gear of the gearbox is a first gear, a large speed ratio and the second gear is a small speed ratio.
Through the working modes and the control strategies, different coupling of driving forces under different vehicle speeds and different loads is realized, real-time power distribution is realized, the double motors share two-gear shifting, the reliability of shifting is ensured, the output torque of the motors and the working of the motors in a high-efficiency range can be further improved, and the power performance and the economical efficiency of the whole vehicle are improved; the dual-motor configuration can still ensure the normal running function of one group of motors when the motors fail, thereby improving the safety of the whole vehicle; the electric drive axle integrates the motor and the axle deeply, so that the weight of the axle assembly is greatly reduced, and the energy consumption of the whole vehicle is reduced; the space of the whole vehicle is improved. The integrated design of the electric axle is not only an innovation of the structure, but also the design of the whole vehicle chassis is simplified by the self-assembly power assembly system, the installation space of the chassis is saved, and the noise of the whole vehicle power system and the transmission system is reduced.
The device comprises a differential bearing piece, a planet speed reduction module bearing piece, a wheel side speed reduction module bearing piece and a speed reduction transmission mechanism bearing piece; the differential 6 is fixed to the axle housing by a differential carrier and rotatably supports the differential; the two half shafts are respectively fixed on the shell through the differential mechanism and the supporting bearing, and the two sleeves are sleeved outside the half shafts.
The gear ring of the planetary reduction module 5 is fixed on a planetary reduction module bearing piece, the planetary reduction module bearing piece is fixedly connected with the axle shell, and the gear ring of the planetary reduction module 5 can support the sun gear and the planetary gear system to concentrically rotate with the differential mechanism 6 in the axle shell.
The wheel-side speed reducing module comprises a wheel-side speed reducing module I9 and a wheel-side speed reducing module II 16, wherein a gear ring of the wheel-side speed reducing module is fixed on a wheel-side speed reducing module bearing piece and is arranged and connected on the axle shell through the wheel-side speed reducing module bearing piece, and the sun gear and the planetary gear train of the wheel-side speed reducing module can be supported to do rotary motion inside, the specific positions can be that the wheel-side speed reducing module I9 and the wheel-side speed reducing module II 16 in the figure 1 are positioned on the inner side of a wheel, can also be positioned inside a first wheel 8 and a second wheel 17 steel ring or positioned on the outer side of the wheel steel ring, and the three positions are concentric with the.
The speed reduction transmission mechanism bearing part module comprises a first gear transmission speed reduction module bearing part, a second gear transmission speed reduction module bearing part, a third gear transmission speed reduction module bearing part, a gear shifting module bearing part, a first gear transmission speed reduction module bearing part and a second gear transmission speed reduction module bearing part, and the speed reduction module and the gear shifting module 11 are fixed on the bearing part through a bearing system and are connected onto an axle housing.
The differential bearing piece, the planet speed reduction bearing piece and the wheel side speed reduction module bearing piece are integrated into a punching welding piece, a shell is arranged outside the integrated punching welding piece, an open hole is formed in the shell, and the shell is fixedly connected with the axle shell through the open hole.
The upper first gear transmission speed reduction module 2 comprises a first transmission gear 2-1, the first transmission gear 2-1 is installed on a first shaft 2-2, and the first shaft 2-2 is fixed on a speed reduction transmission mechanism bearing piece through a bearing; the lower first gear transmission speed reducing module 13 comprises a second transmission gear 13-1, the second transmission gear 13-1 is installed on a second shaft 13-2, and the second shaft 13-2 is fixed on a speed reducing transmission mechanism bearing piece through a bearing; the first transmission gear 2-1 and the second transmission gear 13-1 are respectively connected with the second gear transmission speed reduction module, and power is transmitted to the upper second gear transmission speed reduction module 3 and the lower second gear transmission speed reduction module 12 through gears.
The second gear transmission speed reduction module has two structures, the first structure is shown in figure 2, one side of the second gear transmission speed reduction module is provided with 2 groups of transmission gears, and the other side is provided with 1 group of transmission gears. The second gear transmission speed reduction module comprises a second gear transmission speed reduction module I3 and a second gear transmission speed reduction module II 12; the second gear transmission speed reduction module I3 comprises a third transmission gear 3-1, a fourth transmission gear 3-2 and a third shaft 3-3; the second gear transmission speed reduction module II 12 comprises a fifth transmission gear 12-1 and a fourth shaft 12-2; the third transmission gear 3-1 is meshed with the first transmission gear 2-1, the fifth transmission gear 12-1 is meshed with the second transmission gear 13-1, and the second gear transmission speed reduction module I3 and the second gear transmission speed reduction module II 12 are both meshed with the third gear transmission speed reduction module 4.
Another structure is shown in fig. 3, the second gear transmission speed reduction module comprises a second gear transmission speed reduction module i 3 and a second gear transmission speed reduction module ii 12; the second gear transmission speed reduction module I3 comprises an eighth transmission gear 3-0, a ninth transmission gear 3-1, a tenth transmission gear 3-2 and a seventh shaft 3-3, and the second gear transmission speed reduction module II 12 comprises an eleventh transmission gear 12-0, a fifth transmission gear 12-1 and an eighth shaft 12-2; the eighth transmission gear 3-0 is meshed with the first transmission gear 2-1, the eleventh transmission gear 12-0 is meshed with the second transmission gear 13-1, and the second gear transmission speed reduction module I3 and the second gear transmission speed reduction module II 12 are both meshed with the third gear transmission speed reduction module 4.
The third gear transmission speed reduction module 4 comprises a sixth transmission gear 4-1 and a seventh transmission gear 4-2, the sixth transmission gear 4-1 is installed on a fifth shaft 4-4, the seventh transmission gear 4-2 is installed on a sixth shaft 4-3, and the fifth shaft 4-4 and the sixth shaft 4-3 are respectively fixed on the axle shell through bearings; the fifth shaft 4-4 and the sixth shaft 4-3 are concentric but not connected; a gear shifting joint sleeve is arranged between the sixth transmission gear 4-1 and the seventh transmission gear 4-2, and the gear shifting joint sleeve is meshed with an external spline of the intermediate shaft 10 through an internal spline and can slide left and right in the axial direction of the intermediate shaft 10. Further, the gear shifting combination sleeve outer gear ring can be combined with and separated from the six transmission gear 4-1 and the seventh transmission gear 4-2 respectively through the gear shifting fork and the gear shifting executing mechanism, namely three different relative motion states with the intermediate shaft 10 are realized, namely: when the gear shifting combination sleeve is meshed with the sixth transmission gear 4-1 and the seventh transmission gear 4-2, power can be transmitted to the two gears respectively, two gear shifting speed ratios are achieved, when the gear shifting combination sleeve is located at the middle position of the two gears, the gear shifting combination sleeve is not meshed with the sixth transmission gear 4-1 and the seventh transmission gear 4-2, and the gear shifting combination sleeve is in a power interruption state, namely a neutral gear state.
The planetary reduction module 5 comprises a first sun gear 5-1, a first planet carrier 5-2 and a first planet gear ring 5-3, the first sun gear 5-1 is connected with an intermediate shaft 10 through a key, the first planet gear ring 5-3 is fixed on an axle shell, power is output through the first planet carrier 5-2 of the planetary gear set, and the first planet carrier 5-2 is connected with a differential shell 6-1.
The differential mechanism 6 comprises a planetary gear, a side gear, a planetary gear shaft and a differential mechanism shell 6-1, the side gear is fixedly connected with or integrally formed with a corresponding half shaft, the first planetary carrier 5-2 is connected with the differential mechanism shell 6-1, and power is output to the differential mechanism shell 6-1 and then is transmitted to the first half shaft 7 and the second half shaft 14 through the side gear.
The planetary speed reduction module comprises a second sun gear 9-1, a third sun gear 16-1, a second planet carrier 9-2, a third planet carrier 16-2, a second sun gear ring gear 9-3 and a third sun gear ring gear 16-3, wherein the second sun gear 9-1 is connected with the first half shaft 7, and the third sun gear 16-1 is connected with the second half shaft 14. The following two modes of power output can be realized:
the second sun gear ring gear 9-3, the third sun gear ring gear 16-3 and the axle shell are fixed, so that the second planet carrier 9-2 and the third planet carrier 16-2 output power to wheels; and the second sun gear ring 9-3, the third sun gear ring 16-3 and the axle shell are fixed, so that the second sun gear ring 9-3 and the third sun gear ring 16-3 output power to wheels.
All the gear transmission speed reducing modules and the planet row speed reducing modules are provided with bearings, bearing seals, lubricating oil and the like which are required for supporting the rotation of the gear transmission speed reducing modules and the planet row speed reducing modules;
in order to collect the rotating speed of the differential mechanism, a gear ring is further arranged on the differential mechanism shell, and a non-contact type vehicle speed sensor is arranged on the axle shell and used for providing a vehicle speed signal for the whole vehicle and providing a rotating speed reference for a gear shifting control strategy.
In order to meet the requirements of driving and parking braking, the axle housing is also provided with a corresponding brake, an air chamber, a brake mounting plate and a required ABS sensor assembly related mounting structure and an interface; in order to meet the requirements of bearing and connection with a vehicle frame, the axle housing is also provided with installation structures and interfaces such as a relevant plate spring, a thrust rod, a stabilizer bar, a hub and the like; in order to meet the arrangement requirements of the first driving motor, the second driving motor and related sensor high-low voltage wiring harnesses and cooling water pipes, the axle housing is further provided with related mounting fixing points or bracket mounting points.
As shown in fig. 7, the two sets of driving motor modules 18 distributed on two sides of the axle can be configured identically or differently, and the differential configuration mainly means that the power, torque and efficiency distribution of the motor can be distributed differently. Connect sharing axle assembly module 20 two through transmission module 19 and keep off the module of shifting, through the planetary reduction with power distribution to two semi-axles on through differential mechanism again, finally transmit to the wheel through the hub reduction gear, can realize motor distributed drive and power transmission coupling, through modular bi-motor combination mode and the bi-motor coupling control strategy of difference, compare single motor drive, increase motor load rate, improve motor operating efficiency, reduce the power assembly, reduce whole car energy consumption level, the modular structure, shorten product design development cycle, reduce development cost.
The invention provides a double-motor electric drive axle of a belt wheel side speed reducer, which realizes different coupling of driving force under different speeds and different loads by matching two sets of driving motor systems to share one AMT (automated mechanical transmission), realizes real-time power distribution, and improves the dynamic property of the whole automobile, wherein double motors work simultaneously when the automobile is accelerated rapidly, overtaking and climbing; the single motor is driven under the common working condition, so that the load rate of the motor is improved, the working high-efficiency area of the motor is optimized, and the economy of the whole vehicle is improved; the dual-motor configuration can still ensure the normal running function of one group of motors when the motors fail, thereby improving the safety of the whole vehicle; the dual motors share two gears for gear shifting, the gear shifting reliability is guaranteed, meanwhile, the output torque of the motors and the working of the motors in a high-efficiency interval can be further improved, and the power economy is improved.
Although the present application has been described in detail with reference to the accompanying drawings in conjunction with the preferred embodiments, the present application is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application, and these modifications or substitutions are intended to be covered by the present application/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a two motor drive axles of band pulley limit reduction gear which characterized in that: the driving device comprises a first driving motor (1), a second driving motor (15), an axle shell, a planet carrier, a first half shaft (7), a second half shaft (14) and a differential mechanism (6), wherein the first driving motor (1) and the second driving motor (15) are respectively arranged at two sides of the axle shell, the differential mechanism (6) is fixed on the axle shell, the two half shafts are respectively fixed on the axle shell through the differential mechanism (6), and the first driving motor (1) is connected with a third gear transmission speed reduction module (4) sequentially through an upper first gear transmission speed reduction module (2) and an upper second gear transmission speed reduction module (3); the second driving motor (15) is connected with the third gear transmission speed reduction module (4) sequentially through the lower first gear transmission speed reduction module (13) and the lower second gear transmission speed reduction module (12); the third gear transmission speed reduction module (4) is connected with a sun gear of the planetary speed reduction module (5) in the axle housing through the gear shifting module (11), the planet carrier is connected with the differential case (6-1), the differential case (6-1) is respectively connected with the first half shaft (7) and the second half shaft (14), the first half shaft (7) is connected with the first wheel (8) through the wheel reduction gear, and the second half shaft (14) is connected with the second wheel (17) through the wheel reduction gear.
2. The pulley edge reducer dual-motor electric drive axle of claim 1, wherein: the gear shifting module (11) is connected with a sun gear in the planetary speed reducing module (5) through an intermediate shaft (10); the third gear transmission speed reduction module (4) comprises two pairs of opposite gear modules which are sleeved on the intermediate shaft (10) in an empty mode, and the gear module is driven by the gear shifting module (11) to be meshed with the intermediate shaft (10).
3. The pulley edge reducer dual-motor electric drive axle of claim 1, wherein: the device comprises a differential bearing piece, a planet speed reduction module bearing piece, a wheel side speed reduction module bearing piece and a speed reduction transmission mechanism bearing piece; the differential (6) is fixed on the axle housing through a differential carrier;
the gear ring of the planetary reduction module (5) is fixed on a planetary reduction module bearing piece, the planetary reduction module bearing piece is fixedly connected with the axle shell, and the gear ring of the planetary reduction module (5) supports a sun gear and a planetary gear train to concentrically rotate with the differential (6) in the axle shell;
the wheel-side deceleration module comprises a wheel-side deceleration module I (9) and a wheel-side deceleration module II (16), the wheel-side deceleration module is fixed on a wheel-side deceleration module bearing piece, the wheel-side deceleration module bearing piece is fixed on the axle shell and supports a sun gear and a planetary gear train of the wheel-side deceleration module to rotate inside;
the reduction transmission mechanism bearing piece and the gear shifting module (11) are fixed on the axle shell through bearings;
the differential bearing piece, the planet speed reduction module bearing piece and the wheel side speed reduction module bearing piece are all integrated stamping and welding pieces.
4. The pulley edge reducer dual-motor electric drive axle of claim 1, wherein: the upper first gear transmission speed reduction module (2) comprises a first transmission gear (2-1), and the first transmission gear (2-1) is installed on a first shaft (2-2); the lower first gear transmission speed reduction module (13) comprises a second transmission gear (13-1), and the second transmission gear (13-1) is arranged on a second shaft (13-2); and the first transmission gear (2-1) and the second transmission gear (13-1) are respectively connected with the second gear transmission speed reduction module.
5. The pulley edge reducer dual-motor electric drive axle of claim 4, wherein: the second gear transmission speed reduction module comprises a second gear transmission speed reduction module I (3) and a second gear transmission speed reduction module II (12); the second gear transmission speed reduction module I (3) comprises a third transmission gear (3-1), a fourth transmission gear (3-2) and a third shaft (3-3) where the third transmission gear is located; the second gear transmission speed reduction module II (12) comprises a fifth transmission gear (12-1) and a fourth shaft (12-2); the third transmission gear (3-1) is meshed with the first transmission gear (2-1), the fifth transmission gear (12-1) is meshed with the second transmission gear (13-1), and the second gear transmission speed reduction module I (3) and the second gear transmission speed reduction module II (12) are both meshed with the third gear transmission speed reduction module (4).
6. The pulley edge reducer dual-motor electric drive axle of claim 4, wherein: the second gear transmission speed reduction module comprises a second gear transmission speed reduction module I (3) and a second gear transmission speed reduction module II (12); the second gear transmission speed reduction module I (3) comprises an eighth transmission gear (3-0), a ninth transmission gear (3-1), a tenth transmission gear (3-2) and a seventh shaft (3-3) where the eighth transmission gear (3-0), the ninth transmission gear (3-2) and the seventh shaft (3-3) are located, and the second gear transmission speed reduction module II (12) comprises an eleventh transmission gear (12-0), a fifth transmission gear (12-1) and an eighth shaft (12-2) where the eleventh transmission gear (12-1) is located; the eighth transmission gear (3-0) is meshed with the first transmission gear (2-1), the eleventh transmission gear (12-0) is meshed with the second transmission gear (13-1), and the second gear transmission speed reduction module I (3) and the second gear transmission speed reduction module II (12) are both meshed with the third gear transmission speed reduction module (4).
7. The pulley-edge reducer dual-motor electric drive axle according to any one of claims 5 or 6, characterized in that: the third gear transmission speed reduction module (4) comprises a sixth transmission gear (4-1) and a seventh transmission gear (4-2), the sixth transmission gear (4-1) is installed on a fifth shaft (4-4), the seventh transmission gear (4-2) is installed on a sixth shaft (4-3), and the fifth shaft (4-4) and the sixth shaft (4-3) are fixed on an axle shell through bearings respectively; the fifth shaft (4-4) and the sixth shaft (4-3) are concentric but not connected; a gear shifting combination sleeve is arranged between the sixth transmission gear (4-1) and the seventh transmission gear (4-2), the gear shifting combination sleeve is meshed with an external spline of the intermediate shaft through an internal spline, and the sixth transmission gear (4-1) and the seventh transmission gear (4-2) are in sliding connection with the intermediate shaft (10).
8. The pulley edge reducer dual-motor electric drive axle of claim 1, wherein: the planetary reduction module (5) comprises a first sun gear (5-1), a first planet carrier (5-2) and a first planet gear ring gear (5-3), the first sun gear (5-1) is connected with the intermediate shaft (10) through a key, and the first planet gear ring gear (5-3) is fixed on the axle shell.
9. The pulley edge reducer dual-motor electric drive axle of claim 7, wherein: the differential mechanism (6) comprises a planetary gear, a half axle gear, a planetary gear shaft and a differential mechanism shell (6-1), wherein the half axle gear is fixedly connected with a corresponding half axle or integrally formed, and the first planetary carrier (5-2) is connected with the differential mechanism shell (6-1).
10. The pulley edge reducer dual-motor electric drive axle of claim 1, wherein: the planetary reduction module (5) comprises a second sun gear (9-1), a third sun gear (16-1), a second planet carrier (9-2), a third planet carrier (16-2), a second sun gear ring gear (9-3) and a third sun gear ring gear (16-3), wherein the second sun gear (9-1) is connected with a first half shaft (7), the third sun gear (16-1) is connected with a second half shaft (14), the second sun gear ring gear (9-3), the third sun gear ring gear (16-3) and an axle shell are fixedly connected, and the second sun gear ring gear (9-3), the third sun gear ring gear (16-3) and the axle shell are fixedly connected.
CN202110018630.1A 2021-01-07 2021-01-07 Double-motor electric drive axle of belt wheel side speed reducer Pending CN112644262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110018630.1A CN112644262A (en) 2021-01-07 2021-01-07 Double-motor electric drive axle of belt wheel side speed reducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110018630.1A CN112644262A (en) 2021-01-07 2021-01-07 Double-motor electric drive axle of belt wheel side speed reducer

Publications (1)

Publication Number Publication Date
CN112644262A true CN112644262A (en) 2021-04-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110018630.1A Pending CN112644262A (en) 2021-01-07 2021-01-07 Double-motor electric drive axle of belt wheel side speed reducer

Country Status (1)

Country Link
CN (1) CN112644262A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113733881A (en) * 2021-10-18 2021-12-03 东风德纳车桥有限公司 Dual-motor mechanical coupling electric drive bridge and vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113733881A (en) * 2021-10-18 2021-12-03 东风德纳车桥有限公司 Dual-motor mechanical coupling electric drive bridge and vehicle

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