CN112659870A - Double-motor electric drive axle assembly of belt wheel side speed reducer - Google Patents
Double-motor electric drive axle assembly of belt wheel side speed reducer Download PDFInfo
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- CN112659870A CN112659870A CN202110038075.9A CN202110038075A CN112659870A CN 112659870 A CN112659870 A CN 112659870A CN 202110038075 A CN202110038075 A CN 202110038075A CN 112659870 A CN112659870 A CN 112659870A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/04—Combinations of toothed gearings only
- F16H37/042—Combinations of toothed gearings only change gear transmissions in group arrangement
- F16H37/046—Combinations of toothed gearings only change gear transmissions in group arrangement with an additional planetary gear train, e.g. creep gear, overdrive
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- 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
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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Abstract
The invention provides a double-motor electric drive axle assembly of a belt wheel-side speed reducer, which comprises: the first driving motor M1 and the second driving motor M2 are distributed on two sides of the axle; the first driving motor M1, the first gear transmission speed reducing module, the second gear transmission speed reducing module and the third gear transmission speed reducing module are sequentially connected, and the power output of the first driving motor M1 sequentially passes through the first gear transmission speed reducing module and the second gear transmission speed reducing module to transmit power to the third gear transmission speed reducing module; the power output of the second driving motor M2 is transmitted to the third gear transmission speed reduction module through the fourth gear transmission speed reduction module and the fifth gear transmission speed reduction module in sequence, and is combined with the power of the first driving motor M1. The invention realizes the real-time power distribution and improves the dynamic property of the whole vehicle by coupling the driving forces under different vehicle speeds and different loads; the single motor drive of ordinary operating mode improves the motor load rate, promotes whole car economic nature.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a double-motor electric drive axle assembly with a wheel-side speed reducer.
Background
At present, the electric drive system of the new energy automobile is developed in the direction of integration and integration of a power system. A driving motor, a gearbox, a speed reducer, an axle and the like are integrated as electric drive assembly products in disputes in domestic and foreign vehicle enterprises. Through the integrated design, can further reduce the volume weight of assembly on the one hand, improve power, volume, the moment of torsion density of system, on the other hand promotes the NVH level of electric drive assembly through integrating with the matching that becomes more meticulous, and the serialization of being convenient for, mass production improve the commonality of product and reduce development and manufacturing cost.
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
In order to overcome the defects in the prior art, the invention provides a dual-motor drive axle assembly of a belt wheel side speed reducer, which comprises: the first driving motor M1 and the second driving motor M2 are distributed on two sides of the axle;
the first driving motor M1, the first gear transmission speed reducing module, the second gear transmission speed reducing module and the third gear transmission speed reducing module are connected in sequence,
the power output of the first driving motor M1 sequentially passes through the first gear transmission speed reducing module and the second gear transmission speed reducing module to transmit power to the third gear transmission speed reducing module;
the third gear reduction module includes: the two-gear speed change and gear shift module is meshed with the gear module and connected with the middle shaft, the middle shaft is connected with a sun gear ring of the planetary reduction module, the planetary reduction module is directly connected with the differential mechanism through a planet carrier, power is distributed to the first half shaft and the second half shaft, and the power is transmitted to the first wheel through the first wheel edge reduction module; the speed is transmitted to a second wheel through a second wheel side speed reducing module;
the power output of the second driving motor M2 is transmitted to the third gear transmission speed reduction module through the fourth gear transmission speed reduction module and the fifth gear transmission speed reduction module in sequence, and is combined with the power of the first driving motor M1.
It is further noted that the differential is fitted with a differential carrier; the differential carrier is arranged on the axle housing;
a sun gear ring gear of the planetary speed reduction module is fixed on a planetary speed reduction bearing piece, and the planetary speed reduction bearing piece is connected with the axle housing;
the gear ring of the first wheel side speed reducing module is fixed on the first wheel side speed reducing bearing piece and is connected to the axle shell through the first wheel side speed reducing bearing piece;
the gear ring of the second wheel-side speed reduction module is fixed on the second wheel-side speed reduction bearing piece and is connected to the axle shell through the second wheel-side speed reduction bearing piece;
further comprising: a reduction gear carrier module;
the speed reduction transmission mechanism bearing part module comprises a first gear transmission speed reduction bearing part, a second gear transmission speed reduction bearing part, a third gear transmission speed reduction bearing part, a gear shifting bearing part, a fourth gear transmission speed reduction bearing part and a fifth gear transmission speed reduction bearing part, wherein the first gear transmission speed reduction bearing part is used for fixing the first gear transmission speed reduction module through a bearing;
the carrier is attached to the axle housing.
It should be further noted that the first driving motor M1 and the second driving motor M2 are respectively provided with a motor assembly including: a stator and a rotor rotatable about a stator axis;
the rotor of the first driving motor M1 is connected with the first gear transmission speed reduction module shaft through a spline;
the rotor of the second driving motor M2 is connected with the second gear transmission speed reduction module shaft through a spline;
the stator is fixed on the axle shell through a bolt;
the first driving motor M1 and the second driving motor M2 are respectively provided with a liquid cooling system;
the liquid cooling system comprises a cooling water channel, and cooling liquid in the cooling water channel drives the cooling liquid to circularly flow through the cooling driving part.
It should be further noted that the first gear transmission speed reduction module is provided with a first transmission gear;
the fourth gear transmission speed reduction module is provided with a second transmission gear;
the first transmission gear is arranged on the shaft of the first gear transmission speed reduction module and is fixed on the speed reduction transmission mechanism bearing piece module through a bearing;
the second transmission gear is arranged on the shaft of the second gear transmission speed reducing module and is fixed on the speed reducing transmission mechanism bearing part module through a bearing.
It should be further noted that the second gear reduction module includes: a first gear, a second gear, and a first shaft;
the fifth gear reduction module includes: a third gear, a second shaft and a fifth shaft;
the first gear is meshed with the first transmission gear;
the third gear is meshed with the second transmission gear;
the second gear transmission speed reduction module and the fifth gear transmission speed reduction module are both meshed with the third gear transmission speed reduction module.
It should be further noted that the second gear reduction module includes: a fourth gear, a first gear, a second gear and a first shaft;
the fifth gear reduction module includes: a fifth gear, a third gear, and a second shaft;
the fourth gear is meshed with the first transmission gear;
the fifth gear is meshed with the second transmission gear;
the second gear transmission speed reduction module and the fifth gear transmission speed reduction module are both meshed with the third gear transmission speed reduction module.
It is further noted that the third gear reduction module includes: the third transmission gear, the fourth transmission gear, the first gear transmission bearing and the second gear transmission bearing;
the third transmission gear is arranged on the second half shaft through a second gear transmission bearing;
the fourth transmission gear is arranged on the second half shaft through the first gear transmission bearing;
and a gear shifting combination sleeve is arranged between the third transmission gear and the fourth transmission gear, is in meshed connection with an external spline of the intermediate shaft through internal spline teeth, and realizes left-right sliding in the axial direction of the intermediate shaft.
It should be further noted that the planetary reduction module includes: a sun gear, a planetary gear set and a ring gear;
the sun gear is connected with the intermediate shaft through a key, the planetary gear set is connected with the gear ring in a matched mode, and the planetary gear set is connected with the differential in a matched mode.
It should be further noted that the first wheel-side deceleration module includes: a first sun gear, a first planetary gear set, and a first ring gear;
the second wheel reduction module includes: a second sun gear, a second planetary gear set, and a second ring gear;
the first half shaft is sequentially connected with a first sun gear, a first planetary gear set and a first gear ring, and transmits the output power of the first driving motor M1 and/or the output power of the second driving motor M2 to a first wheel;
the second half shaft is connected with the second sun gear, the second planetary gear set and the second gear ring in sequence and transmits the output power of the first driving motor M1 and/or the output power of the second driving motor M2 to a second wheel.
It is further noted that the differential carrier, the planetary reduction carrier and the first wheel reduction carrier are configured as a one-piece stamped and welded part;
the integrated punching and welding piece is characterized in that two sides of the middle of the integrated punching and welding piece are respectively provided with an open groove capable of accommodating a third gear transmission speed reduction module, and the third gear transmission speed reduction module is fixed in the open groove through bolts.
According to the technical scheme, the invention has the following advantages:
the dual-motor electric drive axle assembly of the belt wheel side speed reducer provided by the invention is provided with a bearing, a bearing sealing element, lubricating oil and the like which are required for supporting the rotation of the assembly, and the stability of the assembly is improved.
The double-motor electric drive axle assembly of the belt wheel edge speed reducer is also provided with a gear ring on the differential case, and the non-contact type vehicle speed sensor is arranged on the axle case and used for providing a vehicle speed signal for the whole vehicle and providing a rotating speed reference for a gear shifting control strategy.
The invention realizes different coupling of driving force under different speeds and different loads by matching two sets of driving motor systems to share one AMT gearbox, realizes real-time power distribution, and improves the power performance of the whole vehicle by simultaneously working double motors when accelerating rapidly, overtaking, high-speed 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.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of a pulley-edge reducer dual-motor electric drive axle assembly;
FIG. 2 is a schematic diagram of an embodiment of a dual-motor electric drive axle assembly with a pulley-edge reducer;
FIG. 3 is a schematic view of a second gear reduction module;
FIG. 4 is a schematic view of the middle of a dual-motor electric drive axle assembly of a belt pulley edge reducer;
FIG. 5 is a schematic view of a first wheel reduction module and a second wheel reduction module;
figure 6 is a schematic view of a first and second wheel reduction module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
The double-motor electric drive axle assembly with the belt wheel side speed reducer can be used on a vehicle, and the vehicle can be a car, a truck or a commercial vehicle and the like. The vehicle is based on electric vehicle driving motor + AMT + transmission shaft + axle car owner's mobile power chain configuration.
The invention provides a pulley-edge reducer dual-motor electric drive axle assembly, as shown in fig. 1 to 6, comprising: the first driving motor M11 and the second driving motor M215 are distributed on two sides of the axle;
the first driving motor M11, the first gear transmission speed reducing module 2, the second gear transmission speed reducing module 3 and the third gear transmission speed reducing module 4 are connected in sequence,
the power output of the first driving motor M11 sequentially passes through the first gear transmission speed reducing module 2 and the second gear transmission speed reducing module 3 to transmit the power to the third gear transmission speed reducing module 4;
that is, the power output by the first driving motor M11 passes through the two-gear speed-changing and gear-shifting module 11 through the second gear reduction module 3 and the third gear reduction module 4 arranged in the axle housing, then is distributed to two half shafts through the differential mechanism through planetary reduction, and finally is transmitted to the wheels through the wheel reduction gear;
the third geared reduction module 4 includes: the two-gear speed-changing and gear-shifting module 11 is meshed with the gear modules and is connected with the intermediate shaft 10, the intermediate shaft 10 is connected with a sun gear ring of the planetary reduction module 5, a sun gear ring of the planetary reduction module 5 is fixed with an axle housing, the planetary reduction module is directly connected with the differential mechanism 6 through a planet carrier, distributes power to the first half shaft 7 and the second half shaft 14, and finally transmits the power to the first wheel 8 through the first wheel edge reduction module 9; to a second wheel 17 through a second wheel-side reduction module 16;
the power output of the second driving motor M215 is transmitted to the third gear transmission speed reduction module 4 through the fourth gear transmission speed reduction module 13 and the fifth gear transmission speed reduction module 12 in sequence, and is combined with the power of the first driving motor M11.
The double-motor electric drive axle assembly of the belt wheel edge speed reducer can effectively improve the dynamic property, the economical efficiency and the safety of a new energy commercial vehicle through the application of the technology, and is convenient for realizing the specialization of a chassis and the serialization of a power assembly.
In the double-motor electric drive axle assembly of the belt wheel side speed reducer, 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 space of the chassis is saved, and the noise is reduced. In addition, the double motors are beneficial to realizing the modularization of a driving motor system, the development difficulty of a high-power large-torque motor is reduced, the types of the motors are reduced, and the serialization expansion of axles with different tonnages is convenient to realize.
The described features, structures, or characteristics of a pulley edge reducer dual electric drive axle assembly provided by the present invention may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations or operations have not been shown or described in detail to avoid obscuring aspects of the invention.
As an embodiment provided by the present invention, the differential 6 is mounted with a differential carrier; the differential carrier is arranged on the axle housing; the differential 6 may be of any type and construction commonly used in the art, and the specific type and construction is not intended to be limiting.
A sun gear ring gear of the planetary reduction module 5 is fixed on a planetary reduction bearing piece, and the planetary reduction bearing piece is connected with the axle housing; the planetary gear train and the differential mechanism 6 can be supported to rotate concentrically in the shell;
the gear ring of the first wheel-side deceleration module 9 is fixed on the first wheel-side deceleration bearing piece and is connected to the axle shell through the first wheel-side deceleration bearing piece;
the gear ring of the second wheel reduction module 16 is fixed on a second wheel reduction bearing piece and is connected to the axle housing through the second wheel reduction bearing piece;
the first wheel-side deceleration bearing piece and the second wheel-side deceleration bearing piece can support the sun gear ring gear and the planetary gear train of the wheel-side deceleration module to do rotary motion in the wheel-side deceleration bearing piece, the specific positions can be that the first wheel-side deceleration module 9 and the second wheel-side deceleration module 16 are positioned on the inner side of a wheel in the figure 1, can also be positioned in steel rings of a first wheel 8 and a second wheel 17 or positioned on the outer side of the steel rings of the wheels, and the three positions are concentric with the axial axis of the wheels;
the double-motor electric drive axle assembly of the belt wheel side speed reducer further comprises: a reduction gear carrier module; the speed reduction transmission mechanism bearing part module comprises a first gear transmission speed reduction bearing part for fixing the first gear transmission speed reduction module 2 through a bearing, a second gear transmission speed reduction bearing part for fixing the second gear transmission speed reduction module 3 through a bearing, a third gear transmission speed reduction bearing part for fixing the third gear transmission speed reduction module 4 through a bearing, a gear shifting bearing part for bearing the two-gear speed change gear shifting module 11, a fourth gear transmission speed reduction bearing part for fixing the fourth gear transmission speed reduction module 13 through a bearing, and a fifth gear transmission speed reduction bearing part for fixing the fifth gear transmission speed reduction module 12 through a bearing; the bearing piece is connected to the axle housing;
the differential carrier, the planetary reduction carrier and the first wheel reduction carrier are configured as an integral stamped weld. The two sides of the middle part of the integrated stamping and welding part are respectively provided with an open groove capable of accommodating the third gear transmission speed reducing module 4, and the third gear transmission speed reducing module 4 is fixed in the open groove through bolts.
The present invention provides a pulley edge reducer dual electric drive axle assembly when an element or layer is referred to as being "on" and "connected" or "coupled" to another element or layer, it may be directly on, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the dual-motor electric drive axle assembly of the belt wheel side reducer provided by the invention, the first drive motor M11 and the second drive motor M215 are respectively provided with a motor assembly which respectively comprises: a stator and a rotor rotatable about a stator axis;
the rotor of the first driving motor M11 is connected with the first gear transmission speed reduction module shaft 2-2 through a spline;
the rotor of the second driving motor M214 is connected with the second gear transmission speed reduction module shaft 13-2 through a spline; the stator is fixed on the axle shell in a matched manner through bolts; the first driving motor M11 and the second driving motor M214 are respectively provided with a liquid cooling system;
the liquid cooling system comprises a cooling water channel, and cooling liquid in the cooling water channel drives the cooling liquid to circularly flow through the cooling driving part. This achieves the objective of cooling the internal components of the assembly.
As the embodiment provided by the invention, the first gear transmission speed reduction module 2 is provided with a first transmission gear 2-1; the fourth gear transmission speed reduction module 12 is provided with a second transmission gear 13-1; the first transmission gear 2-1 is arranged on the first gear transmission speed reduction module shaft 2-2 and is fixed on the speed reduction transmission mechanism bearing part module through a bearing; the second transmission gear 13-1 is arranged on the second gear transmission speed reduction module shaft 13-2 and is fixed on the speed reduction transmission mechanism bearing part module through a bearing.
Further, the second gear reduction module 3 includes: a first gear 3-1, a second gear 3-2, and a first shaft 3-3;
the fifth gear reduction module 12 includes: a third gear 12-1 and a fifth shaft 12-3; the first gear 3-1 is meshed with the first transmission gear 2-1; the third gear 12-1 is meshed with the second transmission gear 13-1; the second gear reduction module 3 and the fifth gear reduction module 12 are both engaged with the third gear reduction module 4.
The second gear reduction module 3 comprises: a fourth gear 3-0, a first gear 3-1, a second gear 3-2 and a first shaft 3-3; the fifth gear reduction module 12 includes: a fifth gear 12-0, a third gear 12-1 and a second shaft 12-2; the fourth gear 3-0 is meshed with the first transmission gear 2-1; the fifth gear 12-0 is meshed with the second transmission gear 12-1; the second gear reduction module 3 and the fifth gear reduction module 12 are both engaged with the third gear reduction module 4.
In the invention, the third gear reduction module (4) comprises: a third transmission gear (4-1), a fourth transmission gear (4-2), a first gear transmission bearing (4-3) and a second gear transmission bearing (4-4);
the third transmission gear (4-1) is arranged on the second half shaft (14) through a second gear transmission bearing (4-4);
the fourth transmission gear (4-2) is arranged on the second half shaft (14) through a first gear transmission bearing (4-3);
a gear shifting combination sleeve is arranged between the third transmission gear (4-1) and the fourth transmission gear (4-2), and the gear shifting combination sleeve is meshed and connected with an external spline of the intermediate shaft (10) through internal spline teeth and realizes left and right sliding in the axial direction of the intermediate shaft (10).
Further, the outer gear ring of the gear shifting combination sleeve can be combined with and separated from a third transmission gear 4-1 and a fourth transmission gear 4-2 of a third gear transmission speed reduction module 4 respectively through a gear shifting fork and a gear shifting execution 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 third transmission gear 4-1 and the fourth 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 third transmission gear 4-1 and the fourth transmission gear 4-2, and the gear shifting combination sleeve is in a power interruption state, namely a neutral gear state.
As for the planetary reduction module 5, the planetary reduction module 5 includes: a sun gear 5-1, a planetary gear set 5-2 and a ring gear 5-3;
the differential mechanism 6 can adopt the models and the structural forms which are commonly used in the field, and the specific structural form is not limited. As still further preferable in the present invention, the differential 6 includes: the planetary gear, the half axle gear, the planetary gear shaft and the differential case 6-1; the sun gear 5-1 is in key connection with the intermediate shaft 10, a gear ring 5-3 of the planetary speed reduction module is fixed on an axle housing, and power output by the first driving motor M11 and power output by the second driving motor M215 are output to the differential mechanism 6 through the planetary gear set 5-2;
the power output from the first drive motor M11 and the power output from the second drive motor M215 are output to the differential 6, and then transmitted to the first axle shaft 7 and the second axle shaft 13 through the side gears, respectively.
The first wheel reduction module 9 includes: a first sun gear 9-1, a first planetary gear set 9-2, and a first ring gear 9-3; the second wheel reduction module 16 includes: a second sun gear 16-1, a second planetary gear set 16-2, and a second ring gear 16-3; the first half shaft 7 is connected with a first sun gear 9-1, a first planetary gear set 9-2 and a first ring gear 9-3 in sequence, and transmits the output power of the first driving motor M11 and/or the output power of the second driving motor M215 to a first wheel 8; the second axle shaft 14 is connected to the second sun gear 16-1, the second planetary gear set 16-2 and the second ring gear 16-3 in sequence, and transmits the output power of the first driving motor M11 and/or the output power of the second driving motor M215 to the second wheel 17.
The double-motor electric drive axle assembly of the belt wheel side speed reducer, disclosed by the invention, has the advantages that the first driving motor M1 and the second driving motor M2 which are distributed on two sides of an axle can output different driving force torques and rotating speeds under the action of the motor controller.
The power output of the first driving motor M1 sequentially passes through the first gear transmission speed reducing module and the second gear transmission speed reducing module to transmit power to the third gear transmission speed reducing module; the third cylindrical gear transmission speed reduction module comprises two pairs of opposite independent gear modules which are sleeved on the intermediate shaft in an empty mode, the gear modules can be meshed with the intermediate shaft under the action of the speed changing and shifting module, the intermediate shaft is directly connected with a sun gear of the planetary speed reduction module, a sun gear ring of the planetary speed reduction module is fixed with the axle housing, a differential mechanism is directly connected through output of the planet carrier, power is distributed to two half shafts, and finally the power is transmitted to wheels through the planetary speed reducer. The power output of the second driving motor M2 is transmitted to the third gear transmission speed reduction module through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence, and is converged with the power of the first driving motor M1;
under two speed change gear shift module effects, can realize three kinds of fender position states, keep off I fender of high fender, keep off II fender and neutral gear of low fender promptly.
The first driving motor M1 is a main driving motor, the power torque of the first driving motor M1 is more than or equal to that of the second driving motor M2, and the first driving motor M1 is mainly used for basic working conditions such as level road starting, slow acceleration, medium and low speed running and the like; the second driving motor M2 is an auxiliary driving motor, and is mainly used for power supplement and providing auxiliary power for vehicles, such as climbing, starting and accelerating, overtaking, high speed, braking energy recovery and the like. Through motor coupling and gear shifting, the following different working modes can be realized:
the first driving motor M1 is a main driving motor, and the second driving motor M2 is an auxiliary driving motor; 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 above working modes and 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 gears for gear shifting, the gear shifting reliability is guaranteed, meanwhile, the output torque of the motor and the working of the motor in a high-efficiency interval 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;
in a preferred embodiment, the axle housing of the present invention is further provided with corresponding brakes, air chambers, brake mounting plates and associated mounting structure and interfaces for the required ABS sensor assembly for service and parking braking.
In order to meet the requirements of bearing and connection with a vehicle frame, the axle housing of the axle 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, 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.
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 terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a two motor drive axle assemblies of band pulley limit reduction gear which characterized in that includes: a first driving motor M1(1) and a second driving motor M2(15) which are distributed at two sides of the axle;
the first driving motor M1(1), the first gear transmission speed reducing module (2), the second gear transmission speed reducing module (3) and the third gear transmission speed reducing module (4) are connected in sequence,
the power output of the first driving motor M1(1) is transmitted to the third gear transmission speed reduction module (4) through the first gear transmission speed reduction module (2) and the second gear transmission speed reduction module (3) in sequence;
the third geared reduction module (4) comprises: the two-gear speed-changing and gear-shifting mechanism comprises two pairs of mutually independent gear modules sleeved on an intermediate shaft (10), a two-gear speed-changing and gear-shifting module (11) is meshed with the gear modules and is connected with the intermediate shaft (10), the intermediate shaft (10) is connected with a sun gear ring of a planetary reduction module (5), the planetary reduction module directly connects a differential (6) through a planet carrier, distributes power to a first half shaft (7) and a second half shaft (14) and transmits the power to a first wheel (8) through a first wheel edge reduction module (9); transmitted to a second wheel (17) through a second wheel side deceleration module (16);
the power output of the second driving motor M2(15) is transmitted to the third gear transmission speed reduction module (4) through the fourth gear transmission speed reduction module (13) and the fifth gear transmission speed reduction module (12) in sequence, and is combined with the power of the first driving motor M1 (1).
2. A pulley edge reducer dual-motor electric drive axle assembly according to claim 1,
the differential (6) is provided with a differential carrier; the differential carrier is arranged on the axle housing;
a sun gear ring gear of the planetary reduction module (5) is fixed on a planetary reduction bearing piece, and the planetary reduction bearing piece is connected with the axle housing;
the gear ring of the first wheel-side speed reduction module (9) is fixed on a first wheel-side speed reduction bearing piece and is connected to the axle shell through the first wheel-side speed reduction bearing piece;
the gear ring of the second wheel-side deceleration module (16) is fixed on a second wheel-side deceleration bearing piece and is connected to the axle shell through the second wheel-side deceleration bearing piece;
further comprising: a reduction gear carrier module;
the speed reduction transmission mechanism bearing part module comprises a first gear transmission speed reduction bearing part for fixing the first gear transmission speed reduction module (2) through a bearing, a second gear transmission speed reduction bearing part for fixing the second gear transmission speed reduction module (3) through a bearing, a third gear transmission speed reduction bearing part for fixing the third gear transmission speed reduction module (4) through a bearing, a gear shifting bearing part for bearing the two-gear speed change gear shifting module (11), a fourth gear transmission speed reduction bearing part for fixing the fourth gear transmission speed reduction module (13) through a bearing, and a fifth gear transmission speed reduction bearing part for fixing the fifth gear transmission speed reduction module (12) through a bearing;
the carrier is attached to the axle housing.
3. A pulley edge reducer dual-motor electric drive axle assembly according to claim 1,
the first driving motor M1(1) and the second driving motor M2(15) are respectively provided with a motor including: a stator and a rotor rotatable about a stator axis;
the rotor of the first driving motor M1(1) is connected with the first gear transmission speed reduction module shaft (2-2) through a spline;
the rotor of the second driving motor M2(14) is connected with the second gear transmission speed reduction module shaft (13-2) through a spline;
the stator is fixed on the axle shell through a bolt;
the first driving motor M1(1) and the second driving motor M2(14) are respectively provided with a liquid cooling system;
the liquid cooling system comprises a cooling water channel, and cooling liquid in the cooling water channel drives the cooling liquid to circularly flow through the cooling driving part.
4. A pulley edge reducer dual-motor electric drive axle assembly according to claim 1,
the first gear transmission speed reduction module (2) is provided with a first transmission gear (2-1);
the fourth gear transmission speed reduction module (12) is provided with a second transmission gear (13-1);
the first transmission gear (2-1) is arranged on the first gear transmission speed reduction module shaft (2-2) and is fixed on the speed reduction transmission mechanism bearing part module through a bearing;
the second transmission gear (13-1) is arranged on the second gear transmission speed reduction module shaft (13-2) and is fixed on the speed reduction transmission mechanism bearing part module through a bearing.
5. The pulley edge reducer dual-motor electric drive axle assembly according to claim 4,
the second geared reduction module (3) comprises: a first gear (3-1), a second gear (3-2) and a first shaft (3-3);
the fifth gear reduction module (12) comprises: a third gear (12-1), a second shaft (12-2) and a fifth shaft (12-3);
the first gear (3-1) is meshed with the first transmission gear (2-1);
the third gear (12-1) is meshed with the second transmission gear (13-1);
the second gear transmission speed reduction module (3) and the fifth gear transmission speed reduction module (12) are both meshed with the third gear transmission speed reduction module (4).
6. The pulley edge reducer dual-motor electric drive axle assembly according to claim 4,
the second geared reduction module (3) comprises: a fourth gear (3-0), a first gear (3-1), a second gear (3-2) and a first shaft (3-3);
the fifth gear reduction module (12) comprises: a fifth gear (12-0), a third gear (12-1) and a second shaft (12-2);
the fourth gear (3-0) is meshed with the first transmission gear (2-1);
the fifth gear (12-0) is meshed with the second transmission gear (12-1);
the second gear transmission speed reduction module (3) and the fifth gear transmission speed reduction module (12) are both meshed with the third gear transmission speed reduction module (4).
7. A pulley edge reducer dual-motor electric drive axle assembly according to claim 1,
the third geared reduction module (4) comprises: a third transmission gear (4-1), a fourth transmission gear (4-2), a first gear transmission bearing (4-3) and a second gear transmission bearing (4-4);
the third transmission gear (4-1) is arranged on the second half shaft (14) through a second gear transmission bearing (4-4);
the fourth transmission gear (4-2) is arranged on the second half shaft (14) through a first gear transmission bearing (4-3);
a gear shifting combination sleeve is arranged between the third transmission gear (4-1) and the fourth transmission gear (4-2), and the gear shifting combination sleeve is meshed and connected with an external spline of the intermediate shaft (10) through internal spline teeth and realizes left and right sliding in the axial direction of the intermediate shaft (10).
8. A pulley edge reducer dual-motor electric drive axle assembly according to claim 7,
the planetary reduction module (5) comprises: a sun gear (5-1), a planetary gear set (5-2) and a ring gear (5-3);
the sun gear (5-1) is in key connection with the intermediate shaft (10), the planetary gear set (5-2) is in matched connection with the gear ring (5-3), and the planetary gear set (5-2) is in matched connection with the differential (6).
9. A pulley edge reducer dual-motor electric drive axle assembly according to claim 1,
the first wheel reduction module (9) comprises: a first sun gear (9-1), a first planetary gear set (9-2), and a first ring gear (9-3);
the second wheel reduction module (16) comprises: a second sun gear (16-1), a second planetary gear set (16-2), and a second ring gear (16-3);
the first half shaft (7) is connected with a first sun gear (9-1), a first planetary gear set (9-2) and a first gear ring (9-3) in sequence and transmits the output power of the first driving motor M1(1) and/or the output power of the second driving motor M2(15) to a first wheel (8);
the second half shaft (14) is connected with a second sun gear (16-1), a second planetary gear set (16-2) and a second gear ring (16-3) in sequence, and transmits the output power of the first driving motor M1(1) and/or the output power of the second driving motor M2(15) to a second wheel (17).
10. A pulley edge reducer dual-motor electric drive axle assembly according to claim 2,
the differential carrier, the planetary reduction carrier and the first wheel reduction carrier are configured as an integral stamped and welded part;
the two sides of the middle part of the integrated punching and welding part are respectively provided with an open groove capable of accommodating the third gear transmission speed reducing module (4), and the third gear transmission speed reducing module (4) is fixed in the open groove through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038075.9A CN112659870A (en) | 2021-01-12 | 2021-01-12 | Double-motor electric drive axle assembly of belt wheel side speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038075.9A CN112659870A (en) | 2021-01-12 | 2021-01-12 | Double-motor electric drive axle assembly of belt wheel side speed reducer |
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| Publication Number | Publication Date |
|---|---|
| CN112659870A true CN112659870A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110038075.9A Pending CN112659870A (en) | 2021-01-12 | 2021-01-12 | Double-motor electric drive axle assembly of belt wheel side speed reducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113561748A (en) * | 2021-08-17 | 2021-10-29 | 北方汤臣传动科技有限公司 | Electric drive axle system |
| CN113978224A (en) * | 2021-11-16 | 2022-01-28 | 江苏华永复合材料有限公司 | Double-motor double-gear electric drive axle |
-
2021
- 2021-01-12 CN CN202110038075.9A patent/CN112659870A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113561748A (en) * | 2021-08-17 | 2021-10-29 | 北方汤臣传动科技有限公司 | Electric drive axle system |
| CN113978224A (en) * | 2021-11-16 | 2022-01-28 | 江苏华永复合材料有限公司 | Double-motor double-gear electric drive axle |
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