CN112937283A - Double-planet-row coaxial multi-module electric coupling device and control method thereof - Google Patents
Double-planet-row coaxial multi-module electric coupling device and control method thereof Download PDFInfo
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- CN112937283A CN112937283A CN202110241179.XA CN202110241179A CN112937283A CN 112937283 A CN112937283 A CN 112937283A CN 202110241179 A CN202110241179 A CN 202110241179A CN 112937283 A CN112937283 A CN 112937283A
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
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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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
- B60K6/405—Housings
Abstract
The invention relates to a double-planet-row coaxial multi-module electromechanical coupling device and a control method, which realize the decoupling of engine torque and wheels in the independent driving and mixed driving modes of an engine and meet the requirements of various working conditions; the front planet row and the rear planet row are coaxially arranged, so that the torque centers of power parts are consistent, the stability of transmission is facilitated, the arrangement space is saved, the modification space is large, if a brake B2 is additionally arranged between the second gear ring and the shell, and a clutch C2 is additionally arranged between the output shaft and the motor MG1, the two-gear speed change function can be realized, and the requirement of higher vehicle speed compared with the original design is met. The front planet row and the rear planet row of the planetary gear set have the common gear component required by linkage, namely the first gear ring and the second planet carrier are connected to the same output shaft through spline fit to realize the transmission of torque, and compared with the traditional design scheme of an integrated common gear component, the planetary gear set is simpler to process and easier to realize coaxial precision.
Description
Technical Field
The invention belongs to the technical field of hybrid vehicles, relates to a power assembly of a heavy hybrid vehicle, and particularly relates to a double-planet-row coaxial multi-module electric coupling device.
Background
Energy conservation and environmental protection are two important problems concerned by the whole human society, all countries and regions in the world pay high attention, the requirements on oil consumption and emission are increased, the research and the development of new energy automobiles are greatly promoted, and the application of a hybrid power technology in a heavy vehicle system is an important research subject.
The series-parallel hybrid power scheme has the characteristics and advantages of series and parallel configurations, wherein an EVT (electrical Variable Transmission) series-parallel hybrid power structure with multiple working modes can simultaneously adjust the rotating speed and the torque of an engine to be decoupled with wheels by controlling a planetary gear train through a motor, and the fuel economy can be obviously improved. Although the planetary gear train represented by the Toyota Pointz THS technology has high working efficiency, the planetary gear train is only suitable for a small-torque transmission working condition due to structural limitation, obviously does not meet the large-torque requirement of a heavy vehicle, and if a pair of speed-reducing and torque-increasing gears is simply added, the spatial adjustability is reduced due to non-coaxial arrangement; if the multi-planet-row structure of the automatic transmission is referred, the structure of the toothed part which plays a linkage role in the front row and the rear row is complex, and the processing difficulty is high.
Therefore, there is a need for an improvement of the conventional electromechanical coupling device, so that the series-parallel hybrid system can satisfy the requirements of the heavy-duty vehicle on the basis of keeping the original advantages.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a dual-planetary-row coaxial multi-module electromechanical coupling device suitable for a heavy hybrid vehicle, which can significantly reduce oil consumption, save installation and layout space, and has low processing difficulty and large modification space.
The invention relates to a double-planet-row coaxial multi-module electromechanical coupling device, which comprises: the planetary gear set comprises a first planet row, a second planet row and an output shaft, wherein the first planet row comprises a first sun gear, a first planet carrier, a first planet gear shaft and a first gear ring, and the second planet row comprises a second sun gear, a second planet carrier, a second planet gear shaft and a second gear ring;
the first planet row, the second planet row and the output shaft are coaxially arranged;
the rotating shaft of the first sun gear is hollow and internally sleeved with the rotating shaft of the first planet carrier, and the rotating shaft of the second sun gear is hollow and internally sleeved with the output shaft;
the rotating shaft of the first planet carrier is connected with an engine through a clutch C1, the rotating shaft of the first sun gear is connected with the motor shaft of a motor MG1, the rotating shaft of the second sun gear is connected with the motor shaft of a motor MG2, and the motor shaft of the motor M1 is connected with a brake B1;
the first gear ring, the second planet carrier and the output shaft are coaxially and fixedly connected.
Preferably, the mounting of the brake B2 between the second ring gear and the housing enables a detachable fixing of the second ring gear relative to the housing of the electromechanical coupling device or a fixing of the second ring gear to the housing.
Preferably, a clutch C2 is added between the output shaft and the motor shaft of the motor MG2, so that the output shaft is combined with and separated from the motor shaft of the motor MG 2.
Preferably, the first planetary row, the second planetary row and the output shaft are each axially positioned relative to one another by shoulders of different shaft sections.
Preferably, first ring gear, second planet carrier are spline fit with being connected of the different axle sections of output shaft, and carry out preliminary axial positioning through corresponding shaft shoulder, and the nearly spline department of first ring gear and second planet carrier bores threaded hole, carries out final location and fixes through hexagonal socket head cap end holding screw.
Preferably, a first oil duct is arranged in a rotating shaft of the first planet carrier, a second oil duct is arranged in the first planet shaft, a third oil duct is radially arranged in the first planet carrier, the second oil duct comprises an axial section and a radial section, and the diameter of the joint of the second oil duct and the third oil duct is the same and an oil duct opening is in contact with each other to form a first joint oil duct;
the second planet carrier is characterized in that a fourth oil duct is arranged in the second planet shaft and comprises an axial section and a radial section, a fifth oil duct is radially arranged in the second planet carrier, and the fourth oil duct and the fifth oil duct are identical in diameter at the joint and are in contact with each other at oil duct openings to form a second joint oil duct.
Preferably, a boss portion is arranged at the tail end of the rotating shaft of the first planet carrier, the boss portion is embedded into a concave pit at the tail end of one side of the output shaft, a first oil passage is arranged in the rotating shaft of the first planet carrier, the diameter of the joint of the first oil passage and the axial oil passage of the output shaft is the same, and oil passage openings of the first oil passage and the axial oil passage are not in contact with each other.
The invention also relates to a control method of the multi-mode electromechanical coupling device, which is suitable for the device, wherein in an electric drive mode, the clutch C1 is separated, the brake B1 is closed, the whole vehicle is independently driven by the motor MG2, the first planetary line does not participate in transmission, the second planetary line plays a role in reducing speed and increasing torque, and the torque of the motor MG2 is transmitted to an output shaft to drive the vehicle.
In the case of a large torque demand, the clutch C1 is closed, the brake B1 is disengaged, and the engine and the motor MG2 participate in driving simultaneously, where the first planetary row is a power splitting planetary row and the second planetary row is a speed reducing and torque increasing planetary row.
When the electric quantity of the whole vehicle is low, the clutch C1 is closed, the brake B1 is separated, the engine is used as a main power source to drive the vehicle, and the motor MG1 can absorb the power of the engine, so that the first planet row realizes the power division effect on the engine.
Compared with the prior art, the invention has the advantages that:
1. the invention is matched with a power component, realizes the decoupling of the engine torque and the wheels under the independent driving and mixed driving modes of the engine, and meets the requirements of various working conditions.
2. The front planet row and the rear planet row are coaxially arranged, so that the torque centers of the power components are consistent, the stability of transmission is facilitated, and the arrangement space is saved.
3. The constant-power driving system can effectively expand the constant-power working range of the main driving motor MG2, and can fully meet the power requirements of heavy vehicles in the conditions of running under the conventional working conditions and extreme working conditions such as climbing acceleration and the like.
4. The two-gear speed change device has large transformation space, and if a brake B2 is additionally arranged between the second gear ring and the shell and a clutch C2 is additionally arranged between the output shaft and the motor MG1, the two-gear speed change function can be realized, and the requirement of higher vehicle speed compared with the original design is met.
5. The front planet row and the rear planet row have the common-gear component required by linkage, namely the first gear ring and the second planet carrier are connected to the same output shaft through the spline in a matching mode to realize the transmission of torque, and compared with the traditional design scheme of an integrated common-gear component, the integrated common-gear component has the advantages that the processing is simpler, and the coaxial precision is easier to realize.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is an assembly schematic of the present invention;
FIG. 3 is a first partial schematic view of the present invention;
FIG. 4 is a second partial schematic view of the present invention;
FIG. 5 is a third partial schematic view of the present invention;
fig. 6 shows a second embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-a first sun wheel, 2-a skeleton oil seal a, 3-a first planet carrier, 4-a left box cover bearing, 5-a first planet wheel bearing, 6-a left box cover, 7-a first planet wheel shaft, 8-an isolation sleeve a, 9-a first planet wheel, 10-an inner hexagonal socket head screw a, 11-a flat gasket a, 12-O type sealing ring a, 13-an electromechanical coupling device shell, 14-a first gear ring, 15-a sealing plug, 16-a pipe joint (F type), 17-a second planet carrier, 18-a second planet wheel shaft, 19-a second gear ring, 20-a second planet wheel, 21-a second planet wheel bearing, 22-a right box cover, 23-a skeleton oil seal b, 24-a split retainer ring a, 25-a second sun wheel, 26-output shaft, 27-framework oil seal c, 28-second sun gear bearing, 29-right box cover bearing, 30-inner hexagonal cone end fastening screw a, 31-isolation sleeve b, 32-inner hexagonal cylindrical head screw b, 33-flat washer b, 34-split retainer ring b, 35-framework oil seal d, 36-inner hexagonal cone end fastening screw b, 37-framework oil seal e, 38-first sun gear bearing, 39-framework oil seal f and 40-split retainer ring c.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-2, the double planetary row coaxial multi-mode electromechanical coupling device of the present invention comprises: a first planetary row comprising a first sun wheel 1, a first planet carrier 3, a first planet wheel 9, a first planet wheel shaft 7 and a first ring gear 14, a second planetary row comprising a second sun wheel 25, a second planet carrier 17, a second planet wheel 20, a second planet wheel shaft 18 and a second ring gear 19, and an output shaft 26;
the first planetary row 3, the second planetary row 17 and the output shaft 26 are coaxially arranged;
the rotating shaft of the first sun gear 1 is hollow and is internally sleeved with the rotating shaft of the first planet carrier, the rotating shaft of the second sun gear 25 is hollow and is internally sleeved with an output shaft 26;
the rotating shaft of the first planet carrier is connected with an engine, the first sun gear 1 is connected with a motor MG1, and the second sun gear is connected with a motor MG2 and is connected with each power source to realize multi-motor electric coupling;
the first gear ring, the second planet carrier and the output shaft are coaxially and fixedly connected.
The double-planet-row coaxial multi-module electric coupling device also comprises an electromechanical coupling device shell 13, a left box cover 6 and a right box cover 22, wherein the left box cover 6 and the right box cover 22 are respectively fixedly connected with the electromechanical coupling device shell 13 through screws; specifically, the left box cover and the right box cover are respectively in threaded connection and fixation with the electromechanical coupling device shell through inner hexagonal socket head cap screws and flat washers which are circumferentially arranged;
optionally, the second ring gear is fixed with the electromechanical coupling device housing 13.
The second ring gear 19 of the second planetary row 17 is axially fixed to the electromechanical coupling device housing 13 by means of a threaded connection and is fixed by means of a socket head cap screw b32 and a flat washer b 33.
The upper side and the lower side of the electromechanical coupling device shell are respectively provided with an oil inlet and an oil return port, and an F-shaped pipe joint 16 is arranged;
the inner ring and the outer ring of the first sun wheel bearing 38 are axially positioned through a first planet carrier 3 shaft shoulder and a first sun wheel 1 inner shoulder respectively, the two first planet wheel bearings 5 are symmetrically arranged about the center line of the section of the first planet wheel 9, the inner ring and the outer ring of the two first planet wheel bearings 5 are axially positioned through an isolation sleeve a8 and the first planet wheel 9 inner shoulder respectively, and the inner ring and the outer ring of the left box cover bearing 4 are axially positioned with the first sun wheel 1 shaft shoulder and the left box cover 6 inner shoulder respectively;
the inner ring and the outer ring of the second sun wheel bearing 28 are axially positioned through a shaft shoulder of the second planet carrier 17 and an inner shoulder of the second sun wheel 25 respectively, the two second planet wheel bearings 21 are symmetrically arranged about the central line of the section of the second planet wheel 20, the inner ring and the outer ring of the two second planet wheel bearings 21 are axially positioned through an isolation sleeve b31 and the inner shoulder of the second planet wheel 20 respectively, and the inner ring and the outer ring of the right box cover bearing 29 are axially positioned with the shaft shoulder of the second sun wheel 25 and the inner shoulder of the right box cover 22 respectively.
The first planet wheel shaft 7 is in interference fit with the first planet carrier 3, axial and circumferential positioning is carried out through a D-shaped shaft end of the first planet wheel shaft, and the installation direction of the first planet wheel shaft is the same as the axial stress direction of the first planet wheel shaft; the second planet wheel shaft 18 is in interference fit with the second planet carrier 17, axial and circumferential positioning is carried out through a D-shaped shaft end of the second planet wheel shaft, and the installation direction of the second planet wheel shaft is the same as the axial stress direction of the second planet wheel shaft.
As shown in fig. 3, the first planetary row, the second planetary row and the output shaft are axially and relatively positioned by the shaft shoulders of different shaft segments; preferably, the first gear ring 14, the second planet carrier 17 and the output shaft 26 are connected by spline fit at different shaft sections, and are primarily axially positioned by corresponding shaft shoulders, and threaded holes are drilled at positions near the splines of the first gear ring 14 and the second planet carrier 17, and are finally positioned and fixed by the inner hexagonal cone end set screws 30 and 36;
the front planet row and the rear planet row of the planetary gear set have the common gear component required by linkage, namely the first gear ring and the second planet carrier are connected to the same output shaft through spline fit to realize the transmission of torque, and compared with the traditional design scheme of an integrated common gear component, the planetary gear set is simpler to process and easier to realize coaxial precision.
The parts such as gears, bearings and the like are lubricated by circulating pressure oil, an oil duct is formed in the mechanism and is communicated with the parts to be lubricated, and the parts to be lubricated comprise sun wheel bearings 38 and 28, box cover bearings 4 and 29, planet wheel bearings 5 and 21 and the meshing parts of the gears of the planet row. In order to ensure the consistency of the lubrication of the first planet row and the second planet row, the tail end of the rotating shaft of the first planet carrier is provided with a boss part B, the boss part is embedded into a pit C at the tail end of one side of the output shaft, a first oil duct A is arranged in the rotating shaft of the first planet carrier, the diameter of the joint of the first oil duct and the axial oil duct of the output shaft is the same, the oil duct openings of the first oil duct and the axial oil duct of the output shaft are not in contact, and the lubricating oil is sealed. As shown in fig. 5, a second oil passage F is arranged in the first planet shaft, a third oil passage is radially arranged in the first planet carrier, the second oil passage includes an axial section and a radial section, and the diameter of the joint of the second oil passage F and the third oil passage is the same and the oil passage openings are in contact with each other to form a first joint oil passage D.
The second planet carrier is characterized in that a fourth oil duct F is arranged in the second planet shaft and comprises an axial section and a radial section, a fifth oil duct is radially arranged in the second planet carrier, and the fourth oil duct F is the same as the diameter of the joint of the fifth oil duct and contacts with an oil duct opening to form a second joint oil duct D.
In addition, in order to avoid the situation that oil pressure of a certain oil duct is too low to cause oil-free oil ducts, damping holes E are formed in the first connecting oil duct and the second connecting oil duct.
The internal rotation position of the double-planet-row coaxial multi-mode electromechanical coupling device is sealed by framework oil seals 2, 23, 27, 35, 37 and 39, the structural opening of an oil passage is sealed by a sealing plug 15, and gaps between the left box cover 6 and the right box cover 22 and the electromechanical coupling device shell 13 are sealed by O-shaped sealing rings 12.
The outer sides of the framework oil seals 23, 35 and 39 adopt split retaining rings 24, 34 and 40 to perform axial positioning and limiting, the split retaining rings 24, 34 and 40 are embedded in corresponding shaft section ring grooves, the outer rings are not in contact with the inner wall of the holes, and small gaps are reserved.
The invention is matched with the power component, can realize multiple operation modes such as pure electric drive, engine independent drive, hybrid drive, braking energy recovery and the like, and can realize decoupling of engine torque and wheels in the engine independent drive mode and the hybrid drive mode, thereby meeting the requirements of multiple working conditions.
1 pure electric drive mode: the clutch C1 is disengaged, the brake B1 is closed, and the entire vehicle is driven independently by the motor MG 2. The first planetary row does not participate in transmission, and the second planetary row plays a role in reducing speed and increasing torque. According to the characteristics of the planetary gear train, the output torque of the motor MG2 acting on the second sun gear 25 is amplified by (1+ k) times and then applied to the second planet carrier 17, and finally acts on the output shaft, wherein k is a characteristic parameter of the planetary gear train. The torque of the motor MG2 is transmitted to an output shaft to drive the vehicle.
2 engine independent drive mode: when the electric quantity of the whole vehicle is low, the clutch C1 is closed, the brake B1 is separated, and the engine is used as a main power source to drive the vehicle. The motor MG1 may absorb engine power to split the engine power for the first planetary gear set. According to the characteristics of the planetary gear train, the rotation speed of the engine is determined by the rotation speed of the wheels and the motor MG1 together, so that the decoupling of the rotation speed of the engine and the wheels is realized, and the stepless speed regulation of the motor MG1 can regulate the rotation speed of the engine to an efficient interval. The motor MG2 does not participate in driving, but can recover braking energy through reverse towing during braking.
3 hybrid drive mode: during a high torque demand, the clutch C1 is closed, the brake B1 is disengaged, and the engine and the motor MG2 participate in driving simultaneously, wherein the first planetary row is a power splitting planetary row and the second planetary row is a speed reducing and torque increasing planetary row. Because the total required torque is provided by the motor MG2 and the engine together, the decoupling of the engine torque and the wheels is realized, and if the output torque of the motor MG2 and the rotating speed of the motor MG1 are reasonably regulated, the engine can be operated in the optimal working area, the fuel economy is improved, and the emission is reduced.
In another embodiment of the invention, as shown in fig. 6, a brake B2 is additionally arranged between the second ring gear and the shell, and a clutch C2 is additionally arranged between the output shaft and the motor MG1, so that the two-gear speed change function is realized, and the requirement of higher vehicle speed compared with the original design is met.
Brake B2 is engaged, clutch C2 is disengaged, and low; the brake B2 is disengaged and the clutch C2 is engaged, at which time the rotational speeds of the members of the second planetary gear set are the same and the output torque of the motor MG2 acts directly on the output shaft, which is a high gear.
It should be understood that, the sequence numbers of the steps in the embodiments of the present invention do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A double-planet-row coaxial multi-mode electromechanical coupling device, comprising: the planetary gear set comprises a first planet row, a second planet row and an output shaft, wherein the first planet row comprises a first sun gear, a first planet carrier, a first planet gear shaft and a first gear ring, and the second planet row comprises a second sun gear, a second planet carrier, a second planet gear shaft and a second gear ring;
the method is characterized in that: the first planet row, the second planet row and the output shaft are coaxially arranged;
the rotating shaft of the first sun gear is hollow and internally sleeved with the rotating shaft of the first planet carrier, and the rotating shaft of the second sun gear is hollow and internally sleeved with the output shaft;
the rotating shaft of the first planet carrier is connected with an engine through a clutch C1, the rotating shaft of the first sun gear is connected with the motor shaft of a motor MG1, the rotating shaft of the second sun gear is connected with the motor shaft of a motor MG2, and the motor shaft of the motor M1 is connected with a brake B1;
the first gear ring, the second planet carrier and the output shaft are coaxially and fixedly connected.
2. The electromechanical coupling device of claim 1, wherein: the brake B2 is mounted between the second ring gear and the housing, so that the second ring gear can be fixed to the housing of the electromechanical coupling device in a detachable manner or fixed to the housing.
3. The electromechanical coupling device of claim 1, wherein: a clutch C2 is additionally arranged between the output shaft and the motor shaft of the motor MG2, so that the output shaft is combined with and separated from the motor shaft of the motor MG 2.
4. An electromechanical coupling device according to any of claims 1 to 3, wherein: the first planet row, the second planet row and the output shaft are axially and relatively positioned through shaft shoulders of different shaft sections respectively.
5. An electromechanical coupling device according to any of claims 1 to 3, wherein: first ring gear, second planet carrier are the spline fit with being connected of the different axle sections of output shaft, and carry out preliminary axial positioning through corresponding shaft shoulder, and the nearly spline department of first ring gear and second planet carrier bores threaded hole, carries out final location and fixes through hexagon socket head cap end holding screw.
6. An electromechanical coupling device according to any of claims 1 to 3, wherein: a first oil duct is arranged in a rotating shaft of a first planet carrier, a second oil duct is arranged in the first planet shaft, a third oil duct is radially arranged in the first planet carrier, the second oil duct comprises an axial section and a radial section, and the diameter of the joint of the second oil duct and the third oil duct is the same and an oil duct opening is contacted to form a first joint oil duct;
the second planet carrier is characterized in that a fourth oil duct is arranged in the second planet shaft and comprises an axial section and a radial section, a fifth oil duct is radially arranged in the second planet carrier, and the fourth oil duct and the fifth oil duct are identical in diameter at the joint and are in contact with each other at oil duct openings to form a second joint oil duct.
7. An electromechanical coupling device according to any of claims 1 to 3, wherein: the tail end of the rotating shaft of the first planet carrier is provided with a boss part, the boss part is embedded into a pit at the tail end of one side of the output shaft, a first oil duct is arranged in the rotating shaft of the first planet carrier, the diameter of the joint of the first oil duct and the axial oil duct of the output shaft is the same, and the oil duct openings of the first oil duct and the axial oil duct of the output shaft are not in contact with each other.
8. A control method of a multimode electromechanical coupling device, which is applied to the device according to any one of claims 1 to 7, characterized in that: in the pure electric drive mode, the clutch C1 is separated, the brake B1 is closed, the whole vehicle is independently driven by the motor MG2, the first planetary gear does not participate in transmission, the second planetary gear plays a role in reducing speed and increasing torque, and the torque of the motor MG2 is transmitted to the output shaft to drive the vehicle.
9. The method of claim 8 wherein during high torque demand, said clutch C1 is closed, said brake B1 is disengaged, and said engine and said electric machine MG2 are simultaneously engaged in drive, with said first planetary row being a power splitting planetary row and said second planetary row being a speed reducing and torque increasing planetary row.
10. The method of claim 9, wherein when the vehicle is powered down, the clutch C1 is closed, the brake B1 is disengaged, the engine is used as the primary power source to drive the vehicle, and the motor MG1 can absorb the power of the engine to enable the first planetary gear set to achieve the power splitting effect on the engine.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115091938A (en) * | 2022-06-23 | 2022-09-23 | 陕西法士特齿轮有限责任公司 | Hybrid power driving system |
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