CN117507809A - Electric drive bridge system and working method thereof - Google Patents

Electric drive bridge system and working method thereof Download PDF

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Publication number
CN117507809A
CN117507809A CN202311731736.1A CN202311731736A CN117507809A CN 117507809 A CN117507809 A CN 117507809A CN 202311731736 A CN202311731736 A CN 202311731736A CN 117507809 A CN117507809 A CN 117507809A
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CN
China
Prior art keywords
gear
clutch
motor
driving
connecting shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311731736.1A
Other languages
Chinese (zh)
Inventor
王琛
张庆鹏
周立洋
张召丽
公彦峰
李亚男
邹震宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China National Heavy Duty Truck Group Jinan Power Co Ltd
Original Assignee
China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China National Heavy Duty Truck Group Jinan Power Co Ltd filed Critical China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority to CN202311731736.1A priority Critical patent/CN117507809A/en
Publication of CN117507809A publication Critical patent/CN117507809A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/121—Power-transmission from drive shaft to hub
    • B60B35/122—Power-transmission from drive shaft to hub using gearings
    • 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
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

The invention provides an electric drive bridge system and a working method thereof, which relate to the field of electric drive bridges and adopt the following scheme: the differential mechanism comprises a first half shaft and a second half shaft, wherein a first side gear and a second side gear are oppositely arranged in a differential mechanism shell, the differential mechanism also comprises a first motor and a second motor, a first transmission mechanism is driven by the first motor, a second transmission mechanism is driven by the second motor, a first driving gear and a second driving gear are arranged outside the shell in parallel, the first driving gear and the second driving gear can drive the shell to rotate, the first driving gear is respectively meshed with the first transmission mechanism and the second transmission mechanism, the second driving gear is respectively meshed with the first transmission mechanism and the second transmission mechanism, the first transmission mechanism is connected with the first half shaft through a third clutch, the second transmission mechanism is connected with the second half shaft through a fourth clutch, the first side gear is connected with the first half shaft through a first clutch, and the second side gear is connected with the second half shaft through a second clutch. The invention can effectively improve the economy of the whole vehicle and solve the problem of tire grinding and tire eating under complex road conditions.

Description

Electric drive bridge system and working method thereof
Technical Field
The invention relates to the field of electric drive bridges, in particular to an electric drive bridge system and a working method thereof.
Background
The mechanical differential mechanism can enable the left and right (or front and rear) driving wheels to realize a mechanism rotating at different rotating speeds, the differential mechanism consists of a planetary gear, a planetary carrier (differential shell), a half shaft gear and other parts, the power of an engine enters the differential mechanism through a transmission shaft to directly drive the planetary carrier, then the planetary gear drives the left and right half shafts to respectively drive the left and right wheels, when an automobile runs straight, the rotating speeds of the left and right wheels and the planetary carrier are equal and are in balanced working conditions, and when the automobile turns, the balanced working conditions of the left and right wheels and the planetary carrier are destroyed, so that the rotating speed of an inner wheel is reduced, and the rotating speed of an outer wheel is increased; but the mechanical differential mechanism is used on the electric drive bridge, so that the number of mechanical differential speed and gear transmission is increased, the transmission path and transmission efficiency of the system are reduced, and the economy of the whole vehicle cannot be well considered.
In the prior art, in order to avoid the influence that the mechanical differential mechanism is greater than transmission efficiency, adopt the direct drive's of wheel limit mode to replace the mechanical differential mechanism, directly drive corresponding semi-axis through two motors promptly to through the rotational speed of automatically controlled form control two motors, and then realize that both sides semi-axis is different, wheel rotational speed promptly, this technical scheme has the power transmission route weak point, and transmission efficiency is high.
However, by adopting the technical scheme, because no mechanical differential speed exists, the differential speed control of the left motor and the right motor is completely controlled by electric control, the excitation load spectrum of the road surface is required to be identified, under the condition of uneven road surface, relatively more ramp ways of the curve and other road conditions, the response speed generates time difference and the excitation load spectrum is identified to have errors, so that the rotating speeds of the tires on two sides are difficult to meet driving requirements, the phenomena of tire grinding and tire eating of the wheels under the condition of poor road conditions occur, and meanwhile, in order to adapt to torque requirements, the motors with higher power and torque are required to be matched, so that on one hand, the cost is increased, and on the other hand, the control and comfort of the whole vehicle are greatly influenced due to the large increase of unsprung mass.
Disclosure of Invention
In order to solve the technical problem that the electric drive bridge in the prior art has the phenomenon of tire grinding and tire eating of wheels under complex working conditions, the invention provides an electric drive bridge system and a working method thereof, which can effectively improve the economy of the whole vehicle and solve the problem of tire grinding and tire eating under complex road conditions.
In order to solve the technical problems, in a first aspect, the invention provides an electric drive axle system, which comprises a first half shaft and a second half shaft, and comprises a differential mechanism, wherein the differential mechanism comprises a shell, a first side gear and a second side gear are oppositely arranged in the shell, the electric drive axle system further comprises a first motor and a second motor, the first motor is driven with a first transmission mechanism, the second motor is driven with a second transmission mechanism, a first driving gear and a second driving gear are arranged outside the shell in parallel, the first driving gear and the second driving gear can drive the shell to rotate, the first driving gear is meshed with the first transmission mechanism and the second transmission mechanism respectively, the second driving gear is connected with the first transmission mechanism and the second transmission mechanism through a third clutch, the second transmission mechanism is connected with the second half shaft through a fourth clutch, the first side gear is connected with the first half shaft through a first clutch, and the second side gear is connected with the second half shaft through a second clutch. Through the cooperation of differential mechanism, motor one, motor two, clutch one, clutch two, clutch three and clutch four, can make the navigating mate select according to the operating mode by differential mechanism drive semi-axis one and semi-axis two, or by motor one and motor two drive semi-axis one and semi-axis two, make full use of wheel limit drive and mechanical differential drive respective advantage, effectively improve whole car economic nature, ground child and eat child problem under the complicated operating mode has been solved.
Further, the first transmission mechanism adopts a first gear shifting mechanism, the second transmission mechanism adopts a second gear shifting mechanism, and the first driving gear and the second driving gear are connected with the shell through keys. By using the second gear shifting mechanism and the first gear shifting mechanism, a driver can respectively control whether the first motor and the second motor are used for power transmission according to working conditions and road conditions, and energy loss is reduced.
Further, the first gear shifting mechanism comprises a fourth connecting shaft, a thirteenth gear, a twelfth gear, a first gear shifting executing mechanism and an eleventh gear, the thirteenth gear is connected with the fourth connecting shaft in a four-key mode, the twelfth gear and the eleventh gear are both rotatably arranged on the fourth connecting shaft, the first gear shifting executing mechanism is located between the twelfth gear and the eleventh gear, the twelfth gear is meshed with the first driving gear, the eleventh gear is meshed with the second driving gear, the first motor is connected with a fifth gear, and the fifth gear is meshed with the thirteenth gear. Two gears are adjusted through the cooperation of a plurality of gears, and the output requirements on speed and torque are met.
Further, the second gear of the gear shifting mechanism comprises a third connecting shaft, a seventh gear, an eighth gear, a second gear of the gear shifting executing mechanism and a ninth gear, the seventh gear is connected with the third connecting shaft through a triple bond, the eighth gear and the ninth gear are both rotatably arranged on the third connecting shaft, the second gear of the gear shifting executing mechanism is located between the eighth gear and the ninth gear, the eighth gear is meshed with the first driving gear, the ninth gear is meshed with the second driving gear, the second motor is connected with a second gear, and the second gear is meshed with the seventh gear.
Further, a gear shifting mechanism III is arranged on the shell and comprises a gear shifting gear I, a gear shifting gear II and a gear shifting executing mechanism III which are coaxially arranged, the gear shifting gear I is coaxially arranged and connected with the driving gear I, the gear shifting gear II is coaxially arranged and connected with the driving gear II, the driving gear I and the driving gear II are rotatably connected with the shell, the gear shifting executing mechanism III is arranged on the shell, the transmission mechanism I and the transmission mechanism II are of a gear set structure, and the transmission mechanism I and the transmission mechanism do not comprise the gear shifting mechanism. The structure of the electric drive axle is simplified by arranging a gear shifting mechanism on the differential mechanism.
Further, the first transmission mechanism comprises a connecting shaft four, a fifteenth gear, a sixteenth gear and a seventeenth gear, the fifteenth gear, the sixteenth gear and the seventeenth gear are all connected with the connecting shaft four-key, the sixteenth gear is meshed with the first driving gear, the seventeenth gear is meshed with the second driving gear, the first motor is connected with a fifth gear, the fifth gear is meshed with the fifteenth gear, the second transmission mechanism comprises a connecting shaft three, an eighteenth gear, a nineteenth gear and a twentieth gear, the eighteenth gear, the nineteenth gear and the twentieth gear are all connected with the connecting shaft three-key, the output end of the connecting shaft three is provided with a clutch three, the nineteenth gear is meshed with the first driving gear, the twentieth gear is meshed with the second driving gear, the second motor is connected with a second gear, and the second gear is meshed with the eighteenth gear.
Further, a first gear is arranged on the first half shaft and meshed with the sixth gear, the sixth gear is arranged on the second connecting shaft, the second connecting shaft is connected with the third clutch, the third clutch is connected with the fourth connecting shaft, the first half shaft is connected with the first clutch, and the first clutch is connected with the output shaft of the first side gear.
Further, a fourth gear is arranged on the second half shaft and meshed with the third gear, the third gear is arranged on the first connecting shaft, the first connecting shaft is connected with the fourth clutch, the fourth clutch is connected with the third connecting shaft, the second half shaft is connected with the second clutch, the second clutch is connected with the output shaft of the second side gear, a shaft sleeve is arranged outside the shell, one end of the shaft sleeve is provided with the second driving gear, and the output shaft of the second side gear is rotatably arranged in the shaft sleeve.
Further, the first motor and the second motor are symmetrically arranged on two sides of the differential mechanism, and the first transmission mechanism and the second transmission mechanism are symmetrically arranged on two sides of the differential mechanism. The front axle load and the rear axle load of the vehicle axle are distributed through symmetrical arrangement, the motor is miniaturized through the double-motor structure, modularization and light weight are realized, meanwhile, the power and the torque of the double motors are distributed in real time, the motor load rate of the vehicle under low power can be improved, and the economy of the whole vehicle is further improved.
In a second aspect, the invention further provides an electric drive axle working method, the electric drive axle working method is adopted, when the whole vehicle slides in an idle state, the first clutch, the second clutch, the third clutch and the fourth clutch are all in a disconnection state, when the whole vehicle is in a parking braking state, the first clutch, the second clutch, the third clutch and the fourth clutch are all in a connection state, the first gear shifting mechanism and the second gear shifting mechanism are in a gear-with state, when the whole vehicle is in a medium-high speed driving state or in a good road condition, the first gear shifting mechanism and the second gear shifting mechanism are in a neutral state, the third clutch and the fourth clutch are all in a connection state, when the whole vehicle is started in full load, climbs at a medium-low speed and in a poor road condition, the first clutch and the fourth clutch are all in a disconnection state, and the first gear shifting mechanism and the second gear shifting mechanism are in a gear-with low state; when the whole vehicle cruises at a high speed and the road conditions are poor, the first clutch and the second clutch are both in a combined working condition, the third clutch and the fourth clutch are both in a disconnected working condition, and the first gear shifting mechanism and the second gear shifting mechanism are in a high gear state. The whole vehicle can be covered under various working conditions through various working modes, so that the whole vehicle has economical efficiency and high-efficiency transmission.
From the above technical scheme, the invention has the following advantages:
the invention provides an electric drive axle system and a working method, which can enable a driver to select whether to drive a first half axle and a second half axle or drive the first half axle and the second half axle by a differential mechanism or drive the first half axle and the second half axle by the first motor and the second motor according to working conditions by matching a differential mechanism, a first motor, a second motor, a first clutch, a second clutch, a third clutch and a fourth clutch, so that the respective advantages of wheel rim driving and mechanical differential driving are fully utilized, the economy of the whole automobile is effectively improved, and the problem of tire grinding and tire eating under complex working conditions is solved; the second shifting mechanism and the first shifting mechanism are used, so that a driver can respectively control whether the first motor and the second motor are used for power transmission according to working conditions and road conditions, and energy loss is reduced; the two gears are adjusted through the matching of the first gear shifting mechanism and the second gear shifting mechanism, so that the output requirements on speed and torque are met; the structure of the electric drive axle is simplified by arranging a gear shifting mechanism on the differential mechanism; the symmetrical arrangement is beneficial to the front and rear axle load distribution of the axle, the double-motor structure realizes the miniaturization of the motor, the modularization and the light weight are more beneficial to be realized, meanwhile, the power and the torque of the double motors are distributed in real time, the motor load rate of the vehicle under low power can be improved, and the economy of the whole vehicle is further improved; the whole vehicle can be covered under various working conditions through various working modes, so that the whole vehicle has economical efficiency and high-efficiency transmission.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic diagram of an assembly structure of a first shift mechanism, a second shift mechanism and a differential in a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 4 is a schematic diagram of an assembly structure of a third gear shifting mechanism, a first transmission mechanism, a second transmission mechanism and a differential mechanism in a second embodiment of the present invention.
In the figure, 1, a first wheel assembly; 2. a half shaft I; 3. a first gear; 4. a first clutch; 6. a second gear; 8. a second motor; 9. a clutch IV; 10. a first connecting shaft; 11. a third gear; 12. a half shaft II; 13. a second wheel assembly; 14. a fourth gear; 15. a second clutch; 16. a first motor; 18. a fifth gear; 19. a third clutch; 20. a second connecting shaft; 21. a sixth gear; 5-1, a seventh gear; 5-2, an eighth gear; 5-3, a gear shifting executing mechanism II; 5-4, a ninth gear; 5-5, connecting shaft III; 5-6, a driving gear II; 5-7, shaft sleeve; 5-8, connecting shaft IV; 5-9, eleventh gear; 5-10, a first gear shifting executing mechanism; 5-11, a twelfth gear; 5-12, thirteenth gear; 5-13, a differential mechanism; 5-14, a first driving gear;
5-15, eighteenth gear; 5-16, nineteenth gear; 5-17, twentieth gear; 5-18, seventeenth gear; 5-19, sixteenth gear; 5-20, fifteenth gear; 5-21, a second gear; 5-22, a gear shifting executing mechanism III; 5-23, gear one.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.
Detailed description of the preferred embodiments
As shown in fig. 1 and 2, the present embodiment provides an electric drive axle system, which includes a first half axle 2, a second half axle 12, a differential mechanism 5-13, a first motor 16 and a second motor 8, wherein a first wheel assembly 1 is arranged on the first half axle 2, and a second wheel assembly 13 is arranged on the second half axle 12; the differential mechanism 5-13 comprises a shell, a first side gear and a second side gear are oppositely arranged in the shell, a transmission gear set is further arranged in the shell, the transmission gear set is meshed with the first side gear and the second side gear, a first motor 16 is driven by the transmission mechanism, a second motor 8 is driven by the transmission mechanism, a first driving gear 5-14 and a second driving gear 5-6 are arranged outside the shell in parallel, the first driving gear 5-14 and the second driving gear 5-6 are straight-tooth cylindrical gears, the first driving gear 5-14 and the second driving gear 5-6 can drive the shell to rotate, the first driving gear 5-14 is meshed with the first transmission mechanism and the second transmission mechanism respectively, the second driving gear 5-6 is meshed with the first transmission mechanism and the second transmission mechanism respectively, the first transmission mechanism is connected with the first half shaft 2 through a clutch three 19, the second transmission mechanism is connected with the second half shaft 12 through a clutch four 9, the first side gear is connected with the first half shaft 2 through a clutch 4, and the second side gear is connected with the second half shaft 12 through a clutch 15. Through the cooperation of differential mechanism 5-13, motor one 16, motor two 8, clutch one 4, clutch two 15, clutch three 19 and clutch four 9, can make the navigating mate select according to the operating mode by differential mechanism 5-13 drive semi-axis one 2 and semi-axis two 12, or by motor one 16 and motor two 8 drive semi-axis one 2 and semi-axis two 12, the operation requirement of real-time drive differential when having satisfied the road conditions difference, the requirement of high transmission efficiency has been satisfied again under the condition that the road conditions is good, make full use of wheel limit drive and mechanical differential drive respective advantage, effectively improve whole car economic nature, the problem of milling child under the complicated operating mode has been solved.
As shown in fig. 2, in order to control the motor one 16 or the motor two 8 to work independently under the road conditions such as downhill and the like for realizing the driver, the energy loss is reduced, in the specific embodiment, the transmission mechanism one adopts the transmission mechanism one, the transmission mechanism two adopts the transmission mechanism two, the driving gears one 5-14 and the driving gears two 5-6 are all connected with the shell through splines in a rigid way, and through the arrangement, the control of cutting off and communicating the transmission routes of the motor one 16 and the motor two 8 independently can be realized, the single motor can be realized to work under certain working conditions or road conditions, and the energy loss is reduced; specifically, the first gear shifting mechanism comprises a connecting shaft four 5-8, a thirteenth gear 5-12, a twelfth gear 5-11, a first gear shifting executing mechanism 5-10 and an eleventh gear 5-9, wherein the thirteenth gear 5-12 is connected with the connecting shaft four 5-8 through a flat key, the twelfth gear 5-11 and the eleventh gear 5-9 are rotatably arranged on the connecting shaft four 5-8 through bearings, the first gear shifting executing mechanism 5-10 is positioned between the twelfth gear 5-11 and the eleventh gear 5-9, the first gear shifting executing mechanism 5-10 can realize power transmission between the connecting shaft four 5-8 and the corresponding gear, the twelfth gear 5-11 is meshed with the first driving gear 5-14, the eleventh gear 5-9 is meshed with the second driving gear 5-6, the fourth connecting shaft 5-8 is a low-speed high-torque gear when in power transmission through the twelfth gear 5-11, the fourth connecting shaft 5-8 is a high-speed low-torque gear when in power transmission through the eleventh gear 5-9, the first motor 16 is connected with the fifth gear 18, the fifth gear 18 is meshed with the thirteenth gear 5-12, the second gear shifting mechanism comprises a third connecting shaft 5-5, a seventh gear 5-1, an eighth gear 5-2, a second gear shifting executing mechanism 5-3 and a ninth gear 5-4, the seventh gear 5-1 is connected with the third connecting shaft 5-5 in a key way, the eighth gear 5-2 and the ninth gear 5-4 are both rotatably arranged on the third connecting shaft 5-5 through bearings, the second gear shifting executing mechanism 5-3 is positioned between the eighth gear 5-2 and the ninth gear 5-4, the eighth gear 5-2 is meshed with the first driving gear 5-14, the ninth gear 5-4 is meshed with the second driving gear 5-6, the connecting shaft three 5-5 is a low-speed large torque gear when in power transmission through the eighth gear 5-2, the connecting shaft three 5-5 is a high-speed small torque gear when in power transmission through the ninth gear 5-4, the second gear 6 is connected with the second motor 8, and the second gear 6 is meshed with the seventh gear 5-1.
In this embodiment, as shown in fig. 1, a first gear 3 is provided on a first half shaft 2 through a key connection, the first gear 3 is engaged with a sixth gear 21, the sixth gear 21 is provided on a second connecting shaft 20 through a key connection, the second connecting shaft 20 is connected with one end of a third clutch 19, the other end of the third clutch 19 is connected with a fourth connecting shaft 5-8, the first half shaft 2 is connected with a first clutch 4, the first clutch 4 is connected with an output shaft of a first side gear, a fourth gear 14 is provided on a second half shaft 12 through a key connection, the fourth gear 14 is engaged with a third gear 11, the third gear 11 is provided on a first connecting shaft 10 through a key connection, the first connecting shaft 10 is connected with a fourth clutch 9, the fourth clutch 9 is connected with a third connecting shaft 5-5, the second 12 is connected with a second clutch 15, the second clutch 15 is connected with an output shaft of a second side gear, a sleeve 5-7 is provided outside the housing, one end of the sleeve 5-7 is provided with a second driving gear 5-6, the second driving gear 5-6 is connected with a sleeve 5-7 through a spline, the second side gear is rotatably provided on the output shaft of the second side gear and is rotatably provided in the sleeve 5-7 and is rotatably connected with the second sleeve 5-7.
In this embodiment, as shown in fig. 1, the motor one 16 and the motor two 8 are symmetrically arranged on both sides of the differential 5-13, and the transmission mechanism one and the transmission mechanism two are symmetrically arranged on both sides of the differential 5-13. The front axle load and the rear axle load of the vehicle axle are distributed through symmetrical arrangement, the motor is miniaturized through the double-motor structure, modularization and light weight are realized, meanwhile, the power and the torque of the double motors are distributed in real time, the motor load rate of the vehicle under low power can be improved, and the economy of the whole vehicle is further improved.
In the specific embodiment, the first gear shifting executing mechanism 5-10 and the second gear shifting executing mechanism 5-3 have the same structure and comprise transmission gears, the transmission gears are connected with corresponding connecting shafts, sliding sleeves are axially movably arranged on the outer circumferences of the transmission gears, and the sliding sleeves can be connected with the transmission gears to realize power connection.
Detailed description of the preferred embodiments
As shown in fig. 3 and 4, this embodiment provides an electrically driven bridge system, and the structure of this embodiment is substantially the same as that of the first embodiment, except that: the gear shifting mechanism III is arranged on the shell and comprises a gear shifting gear I5-23, a gear shifting gear II 5-21 and a gear shifting executing mechanism III 5-22 which are coaxially arranged, wherein the gear shifting gear I5-23 and the gear shifting executing mechanism III 5-22 are coaxially arranged, the gear shifting gear II 5-21 and the gear driving gear II 5-6 are coaxially arranged, the gear driving gear I5-14 and the gear driving gear II 5-6 are rotatably connected with the shell through bearings, the gear shifting executing mechanism III 5-22 is arranged on a shaft sleeve 5-7 on one side of the shell, one end of the shaft sleeve 5-7 is also provided with a gear driving gear II 5-6 through a bearing, the transmission mechanism I and the transmission mechanism II are of a gear set structure, the transmission mechanism I and the transmission mechanism II do not comprise gear shifting mechanisms, when the gear shifting gear I5-23 is meshed with the gear shifting executing mechanism III 5-22, power is transmitted to the differential mechanism 5-13 through the first motor 16 and the second motor 8, when the gear II 5-21 is meshed with the gear shifting executing mechanism III 5-22, and is a high-speed small torque gear, and the power is transmitted to the differential mechanism 5-13 through the differential mechanism 8 and the differential mechanism 5-6 through the first motor 16 and the second motor 8 and the differential mechanism 5-6; by arranging the gear shifting executing mechanisms III 5-22 on the differentials 5-13, the structure of the electric drive bridge system is simplified on the premise of realizing multi-gear power output.
In this embodiment, as shown in fig. 3 and 4, the first transmission mechanism includes a fourth connecting shaft 5-8, a fifteenth gear 5-20, a sixteenth gear 5-19 and a seventeenth gear 5-18, each of the fifteenth gear 5-20, the sixteenth gear 5-19 and the seventeenth gear 5-18 is connected to the fourth connecting shaft 5-8 by a flat key, the sixteenth gear 5-19 is meshed with the first driving gear 5-14, the seventeenth gear 5-18 is meshed with the second driving gear 5-6, the first motor 16 is connected to the fifth gear 18, the fifth gear 18 is meshed with the fifteenth gear 5-20, the second transmission mechanism includes a third connecting shaft 5-5, an eighteenth gear 5-15, a nineteenth gear 5-16 and a twentieth gear 5-17, each of the nineteenth gear 5-16 and the twentieth gear 5-17 is meshed with the first driving gear 5-14 by a flat key, the twentieth gear 5-17 is meshed with the second driving gear 5-6, the second gear 8 is meshed with the second gear 6, and the second gear 6 is meshed with the eighteenth gear 5-15.
The arrangement positions and connection relationships of the four clutches are the same as those in the first embodiment, and are not described in detail in this embodiment.
The working method of the specific embodiment is as follows:
when the whole vehicle slides in an idle running condition, the first clutch 4, the second clutch 15, the third clutch 19 and the fourth clutch 9 are in a disconnection condition, and the first half shaft 2 and the second half shaft 12 have no power input; when the whole vehicle is in a parking braking working condition, the first clutch 4, the second clutch 15, the third clutch 19 and the fourth clutch 9 are all in a combined working condition, the first gear shifting mechanism and the second gear shifting mechanism are in a gear working condition, and the first half shaft 2, the second half shaft 12 and the differentials 5-13 are in a self-locking state; when the whole vehicle runs at a medium-high speed and has good road conditions, a wheel side driving mode is adopted, namely, a first clutch 4 and a second clutch 15 are both in a disconnection working condition, a third gear shifting mechanism is in a neutral gear state, a third clutch 19 and a fourth clutch 9 are both in a combination working condition, power is transmitted to a first half shaft 2 from a first motor 16, a fourth connecting shaft 5-8 and a third clutch 19, and power is also transmitted to a second half shaft 12 from a second motor 8, a third connecting shaft 5-5 and a fourth clutch 9; when the whole vehicle starts under full load, climbs a slope at medium and low speed and the road conditions are poor, a central differential mode is used, namely, a first clutch 4 and a second clutch 15 are both in a combined working condition, a third clutch 19 and a fourth clutch 9 are both in a disconnected working condition, a third gear shifting mechanism is in a low gear state, and power is input to a differential mechanism 5-13 from a first motor 16 and a second motor 8 through a first driving gear 5-14 and a shaft sleeve 5-7 and then reaches a first half shaft 2 and a second half shaft 12; when the whole vehicle is cruising at a high speed and has poor road conditions, a central differential mode is used, the first clutch 4 and the second clutch 15 are both in a combined working condition, the third clutch 19 and the fourth clutch 9 are both in a disconnected working condition, the third gear shifting mechanism is in a high gear state, and power is input from the first motor 16 and the second motor 8 to the differential mechanism 5-13 through the second driving gear 5-6 and the shaft sleeve 5-7 and then reaches the first half shaft 2 and the second half shaft 12.
Detailed description of the preferred embodiments
The embodiment provides an electric drive bridge working method, which adopts the structure of the embodiment one, and when the whole vehicle slides in an idle running working condition, the clutch one 4, the clutch two 15, the clutch three 19 and the clutch four 9 are all in a disconnection working condition; when the whole vehicle is in a parking braking working condition, the first clutch 4, the second clutch 15, the third clutch 19 and the fourth clutch 9 are all in a combined working condition, the first gear shifting mechanism and the second gear shifting mechanism are in a gear working condition, and the first half shaft 2, the second half shaft 12 and the differentials 5-13 are in a self-locking state; when the whole vehicle runs at a medium-high speed or has a good road condition, a wheel side driving mode is adopted, namely, a first clutch 4 and a second clutch 15 are both in a disconnection working condition, a first gear shifting mechanism and a second gear shifting mechanism are in a neutral state, the degree of freedom of a first half shaft 2 and a second half shaft 12 can not be influenced, a third clutch 19 and a fourth clutch 9 are both in a combination working condition, power reaches the first half shaft 2 from a first motor 16 through a fourth connecting shaft 5-8 and the third clutch 19, and power also reaches the second half shaft 12 from the second motor 8 through a third connecting shaft 5-5 and the fourth clutch 9; when the whole vehicle starts under full load, climbs a slope at medium and low speed and the road conditions are poor, a central differential mode is adopted, namely, a first clutch 4 and a second clutch 15 are both in a combined working condition, a third clutch 19 and a fourth clutch 9 are both in an off working condition, a first gear shifting mechanism and a second gear shifting mechanism are in a gear-carrying state and in a low gear state, and power reaches a differential mechanism 5-13 from a first motor 16 and a second motor 8 through a first driving gear 5-14; when the whole vehicle is in a high-speed cruising working condition and the road conditions are poor, a central differential mode is adopted, namely, a first clutch 4 and a second clutch 15 are both in a combined working condition, a third clutch 19 and a fourth clutch 9 are both in an off working condition, a first gear shifting mechanism and a second gear shifting mechanism are in a gear state and are in a high gear state, and power reaches a differential mechanism 5-13 from a first motor 16 and a second motor 8 through a driving gear 5-6. The multi-working-mode full-automatic transmission device covers various working conditions and road conditions of the whole vehicle through various working modes, and enables the whole vehicle to achieve economical efficiency and efficient transmission.
From the above detailed description, it can be seen that the present invention has the following advantages:
1. through the cooperation of the differential mechanism 5-13, the motor I16, the motor II 8, the clutch I, the clutch II 15, the clutch III 19 and the clutch IV 9, a driver can select whether to drive the half shaft I2 and the half shaft II 12 or drive the half shaft I2 and the half shaft II 12 by the differential mechanism 5-13 or drive the half shaft I2 and the half shaft II 12 by the motor I16 and the motor II 8 according to working conditions, the respective advantages of wheel rim driving and mechanical differential driving are fully utilized, the economy of the whole vehicle is effectively improved, and the problem of tire grinding and eating under complex working conditions is solved;
2. the second shifting mechanism and the first shifting mechanism are used, so that a driver can respectively control whether the first motor 16 and the second motor 8 perform power transmission according to working conditions and road conditions, and energy loss is reduced;
3. the two gears are adjusted through the matching of the first gear shifting mechanism and the second gear shifting mechanism, so that the output requirements on speed and torque are met;
4. the structure of the electric drive axle is simplified by arranging a gear shifting mechanism on the differential mechanism 5-13;
5. the symmetrical arrangement is beneficial to the front and rear axle load distribution of the axle, the double-motor structure realizes the miniaturization of the motor, the modularization and the light weight are more beneficial to be realized, meanwhile, the power and the torque of the double motors are distributed in real time, the motor load rate of the vehicle under low power can be improved, and the economy of the whole vehicle is further improved;
6. the whole vehicle can be covered under various working conditions through various working modes, so that the whole vehicle has economical efficiency and high-efficiency transmission.
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. An electric drive axle system comprises a first half axle (2) and a second half axle (12), and further comprises a differential mechanism (5-13), wherein the differential mechanism (5-13) comprises a shell, a first side gear and a second side gear are oppositely arranged in the shell, the electric drive axle system is characterized by further comprising a first motor (16) and a second motor (8), the first motor (16) is driven by a transmission mechanism, the second motor (8) is driven by the transmission mechanism, a first driving gear (5-14) and a second driving gear (5-6) are arranged outside the shell in parallel, the first driving gear (5-14) and the second driving gear (5-6) can drive the shell to rotate, the first driving gear (5-14) is meshed with the first transmission mechanism and the second transmission mechanism respectively, the second driving gear (5-6) is meshed with the first transmission mechanism and the second transmission mechanism respectively, the first transmission mechanism is connected with the first half axle (2) through a third clutch (19), the second transmission mechanism is connected with the second half axle (12) through a fourth clutch (9), the first side gear is connected with the first half axle (2) through a first clutch (4), and the second side gear (12) is connected with the second half axle (15) through a second clutch.
2. The electric drive bridge system of claim 1, wherein the first transmission mechanism employs
The first gear shifting mechanism and the second gear shifting mechanism are adopted as the transmission mechanism, and the first driving gear (5-14) and the second driving gear (5-6) are connected with the shell through keys.
3. An electric drive axle system as claimed in claim 2, characterized in that the first gear shifting mechanism comprises a fourth connecting shaft (5-8), a thirteenth gear (5-12), a twelfth gear (5-11), a first gear shifting actuator (5-10) and an eleventh gear (5-9), the thirteenth gear (5-12) being keyed to the fourth connecting shaft (5-8), the twelfth gear (5-11) and the eleventh gear (5-9) being rotatably arranged on the fourth connecting shaft (5-8), the first gear shifting actuator (5-10) being located between the twelfth gear (5-11) and the eleventh gear (5-9), the twelfth gear (5-11) being in mesh with the first driving gear (5-14), the eleventh gear (5-9) being in mesh with the second driving gear (5-6), the first motor (16) being connected with a fifth gear (18), the fifth gear (18) being in mesh with the thirteenth gear (5-12).
4. An electric drive bridge system as claimed in claim 3, characterized in that the gear shifting mechanism two comprises a connecting shaft three (5-5), a seventh gear (5-1), an eighth gear (5-2), a gear shifting actuator two (5-3) and a ninth gear (5-4), the seventh gear (5-1) is in key connection with the connecting shaft three (5-5), the eighth gear (5-2) and the ninth gear (5-4) are both rotatably arranged on the connecting shaft three (5-5), the gear shifting actuator two (5-3) is arranged between the eighth gear (5-2) and the ninth gear (5-4), the eighth gear (5-2) is meshed with the first driving gear (5-14), the ninth gear (5-4) is meshed with the second driving gear (5-6), the motor two (8) is connected with the second gear (6), and the second gear (6) is meshed with the seventh gear (5-1).
5. The electric drive axle system of claim 1, wherein a third gear shifting mechanism is provided on the housing, the third gear shifting mechanism includes a first gear shifting gear (5-23), a second gear shifting gear (5-21) and a third gear shifting actuator (5-22) that are coaxially provided, the first gear shifting gear (5-23) is coaxially provided and connected with the first driving gear (5-14), the second gear shifting gear (5-21) is coaxially provided and connected with the second driving gear (5-6), the first driving gear (5-14) and the second driving gear (5-6) are rotatably connected with the housing, the third gear shifting actuator (5-22) is provided on the housing, the first and second gear shifting mechanisms are gear set structures, and neither the first nor second gear shifting mechanism is included.
6. An electric drive axle system as claimed in claim 5, characterized in that the transmission mechanism one comprises a connecting shaft four (5-8), a fifteenth gear (5-20), a sixteenth gear (5-19) and a seventeenth gear (5-18), the fifteenth gear (5-20), the sixteenth gear (5-19) and the seventeenth gear (5-18) are all in key connection with the connecting shaft four (5-8), the sixteenth gear (5-19) is in mesh with the first driving gear (5-14), the seventeenth gear (5-18) is in mesh with the second driving gear (5-6), the first motor (16) is connected with a fifth gear (18), the fifth gear (18) is in mesh with the fifteenth gear (5-20), the transmission mechanism two comprises a connecting shaft three (5-5), an eighteenth gear (5-15), a nineteenth gear (5-16) and a twentieth gear (5-17), the eighteenth gear (5-16) and the twentieth gear (5-17) are all in key connection with the connecting shaft three (5-5) and the seventeenth gear (5-17), the fifth gear (18) is in mesh with the third driving gear (5-16) is in mesh with the output of the third gear (5-16), the twentieth gear (5-17) is meshed with the second driving gear (5-6), the second motor (8) is connected with the second gear (6), and the second gear (6) is meshed with the eighteenth gear (5-15).
7. An electrically driven axle system according to any one of claims 4 or 6, characterized in that the axle shaft one (2) is provided with a first gear wheel (3), the first gear wheel (3) is in engagement with a sixth gear wheel (21), the sixth gear wheel (21) is arranged on the connecting shaft two (20), the connecting shaft two (20) is connected with the clutch three (19), the clutch three (19) is connected with the connecting shaft four (5-8), the axle shaft one (2) is connected with the clutch one (4), and the clutch one (4) is connected with the output shaft of the side gear one.
8. The electric drive axle system of claim 7, characterized in that the axle shaft two (12) is provided with a fourth gear (14), the fourth gear (14) is meshed with the third gear (11), the third gear (11) is arranged on the connecting shaft one (10), the connecting shaft one (10) is connected with the clutch four (9), the clutch four (9) is connected with the connecting shaft three (5-5), the axle shaft two (12) is connected with the clutch two (15), the clutch two (15) is connected with the output shaft of the side gear two, the housing is externally provided with a shaft sleeve (5-7), one end of the shaft sleeve (5-7) is provided with a driving gear two (5-6), and the output shaft of the side gear two is rotatably arranged in the shaft sleeve (5-7).
9. An electric drive axle system according to claim 8, characterized in that the first motor (16) and the second motor (8) are symmetrically arranged on both sides of the differential (5-13), and the first transmission and the second transmission are symmetrically arranged on both sides of the differential (5-13).
10. An electric drive axle working method is characterized in that an electric drive axle system according to claim 8 is adopted, when a whole vehicle slides in an idle state, a first clutch, a second clutch, a third clutch and a fourth clutch are all in a disconnection state, when the whole vehicle is in a parking braking state, the first clutch, the second clutch, the third clutch and the fourth clutch are all in a connection state, a first gear shifting mechanism and a second gear shifting mechanism are in a gear-with state, when the whole vehicle is in a medium-high speed driving state or a good road condition, the first gear shifting mechanism and the second gear shifting mechanism are in a neutral state, the third clutch and the fourth clutch are all in a connection state, when the whole vehicle is started in a full load state, in a medium-low speed climbing state and in a poor road condition, the first clutch and the fourth clutch are all in a disconnection state, and the first gear shifting mechanism and the second gear shifting mechanism are in a gear-with low state; when the whole vehicle cruises at a high speed and the road conditions are poor, the first clutch and the second clutch are both in a combined working condition, the third clutch and the fourth clutch are both in a disconnected working condition, and the first gear shifting mechanism and the second gear shifting mechanism are in a high gear state.
CN202311731736.1A 2023-12-15 2023-12-15 Electric drive bridge system and working method thereof Pending CN117507809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311731736.1A CN117507809A (en) 2023-12-15 2023-12-15 Electric drive bridge system and working method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311731736.1A CN117507809A (en) 2023-12-15 2023-12-15 Electric drive bridge system and working method thereof

Publications (1)

Publication Number Publication Date
CN117507809A true CN117507809A (en) 2024-02-06

Family

ID=89753174

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311731736.1A Pending CN117507809A (en) 2023-12-15 2023-12-15 Electric drive bridge system and working method thereof

Country Status (1)

Country Link
CN (1) CN117507809A (en)

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