CN114734813A - Coaxial electric drive bridge and automobile - Google Patents

Coaxial electric drive bridge and automobile Download PDF

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Publication number
CN114734813A
CN114734813A CN202210441229.3A CN202210441229A CN114734813A CN 114734813 A CN114734813 A CN 114734813A CN 202210441229 A CN202210441229 A CN 202210441229A CN 114734813 A CN114734813 A CN 114734813A
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CN
China
Prior art keywords
gear
transmission
electric drive
motor
main shaft
Prior art date
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Pending
Application number
CN202210441229.3A
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Chinese (zh)
Inventor
邓跃跃
李杉
陆海峰
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Top Gear Powertrain Technology Co ltd
Original Assignee
Top Gear Powertrain Technology 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 Top Gear Powertrain Technology Co ltd filed Critical Top Gear Powertrain Technology Co ltd
Priority to CN202210441229.3A priority Critical patent/CN114734813A/en
Priority to PCT/CN2022/097258 priority patent/WO2023206718A1/en
Publication of CN114734813A publication Critical patent/CN114734813A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • B60K17/04—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Motor Power Transmission Devices (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention provides a coaxial electric drive bridge and an automobile, which comprise at least one motor, at least one transmission assembly, a main shaft and two half shafts connected through a differential mechanism, wherein each motor is in transmission connection with the corresponding transmission assembly; the motor, the main shaft and the two half shafts have the same axis. According to the coaxial electric drive bridge and the automobile, the motor transmits power to the first half shaft and the second half shaft through the transmission assembly, the motor and the main shaft have the same axis through the half shafts, so that the coaxial electric drive bridge has the advantages of novel and compact structural layout, short power transmission chain and high transmission efficiency, a plurality of motors can be driven independently or jointly, various power output modes are realized, the vehicle runs efficiently, and the power requirements of various loads and various working conditions of a commercial vehicle are met.

Description

Coaxial electric drive bridge and automobile
Technical Field
The invention relates to the technical field of vehicles, in particular to a coaxial electric drive axle and an automobile.
Background
The motor and the speed change system are important components of an electric drive bridge, the motor is mainly used for inputting power, and the speed change system is mainly used for realizing the power output of speed reduction, torque increase or speed increase and torque reduction through mechanisms such as gear engagement and the like by using the power from a driving motor or other equipment through the transmission of meshing gears, so that the motion and the operation of a vehicle or other transport machinery are driven.
Most of electric drive bridge systems in the market at present are single in speed ratio, only can provide a single power flow mode, and cannot simultaneously take speed and traction into consideration; only one speed ratio and only one power flow exist; the speed ratio is set to be smaller, the required vehicle speed can be obtained, but the climbing traction force is insufficient; the larger speed ratio is set, so that the speed of the vehicle is lower, and the efficiency is influenced. The existing electric drive axles in the market are provided with two-gear speed change systems, although two power flow modes can be provided, the high-efficiency requirements of a part of working conditions can be met for long-distance traction vehicles with variable road conditions and loads, and the vehicle speed, the traction force and the high efficiency cannot be considered under a plurality of working conditions. Therefore, there is a need to design a new electric drive bridge to solve the above problems.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a coaxial electric drive bridge and an automobile, which can select a proper power combination mode according to vehicle load, road surface condition, transportation time requirement and the like, realize high-efficiency operation of the vehicle, improve efficiency, reduce energy consumption and meet the power requirements of diversified load and diversified working conditions of commercial vehicles.
In order to achieve the above object, the present invention proposes a coaxial electric drive axle comprising at least one electric machine, at least one transmission assembly, a main shaft and two half-shafts connected by a differential,
the main shaft is fixedly connected with the shell of the differential mechanism, and the main shaft is sleeved on the two half shafts;
each motor is in transmission connection with the corresponding transmission assembly,
when the coaxial electric drive bridge is in a transmission mode, each transmission assembly is in transmission connection with the main shaft or the shell of the differential;
the motor, the main shaft and the two half shafts have the same axis.
Preferably, the rotor of each of the motors has a through hole through which the spindle passes.
Preferably, each transmission assembly comprises a sliding sleeve gear shifting mechanism and at least two gear pairs, and the sliding sleeve gear shifting mechanism is sleeved on the main shaft or the shell of the differential mechanism;
when the coaxial electric drive bridge is in a transmission mode, the sliding sleeve gear shifting mechanism is in transmission connection with the corresponding gear pair;
when the coaxial electric drive bridge is in a clutch mode, the sliding sleeve gear shifting mechanism is disconnected with the corresponding gear pair in transmission.
Preferably, each transmission assembly comprises an intermediate shaft, at least two gear pairs, at least one gear pair is used for the transmission connection of the motor and the intermediate shaft,
when the coaxial electric drive bridge is in a transmission mode, at least one gear pair is used for driving connection between the intermediate shaft and the main shaft or the shell of the differential mechanism.
Preferably, when the number of the motors is two, the transmission assembly comprises at least three gear pairs, and at least one gear pair is used for being in transmission connection with the intermediate shaft corresponding to the motors;
when the coaxial electric drive bridge is in a transmission mode, at least two gear pairs are used for driving connection between the intermediate shaft and the main shaft or the shell of the differential mechanism.
Preferably, each of the gear pairs includes a first gear provided on an intermediate shaft, and a second gear provided on the main shaft or the differential case.
Preferably, the number of the transmission assemblies is two, and the two transmission assemblies are symmetrically arranged on two sides of the main shaft; and/or the presence of a gas in the gas,
the number of the motors is two, and the two motors are symmetrically arranged on two sides of the differential mechanism.
Preferably, the coaxial electric drive bridge further comprises a control unit electrically connected with the motor and the sliding sleeve gear shifting mechanism, wherein the control unit is used for controlling the transmission assembly, controlling the sliding sleeve gear shifting mechanism to be in transmission connection with the corresponding gear pair, or controlling the motor to start and stop;
and in a clutch mode, the sliding sleeve gear shifting mechanism is controlled to be disconnected from the corresponding gear pair in transmission.
The invention also provides an automobile comprising any one of the coaxial electric drive bridges described above.
Compared with the prior art, according to the coaxial electric drive axle and the automobile, the motor transmits power to the first half axle and the second half axle through the transmission assembly, when the two motors are driven, the motor rotates through the main shaft to drive the gear pair on the middle shaft to rotate, and then the power is transmitted to the first half axle and the second half axle, the motor, the main shaft, the first half axle and the second half axle have the same axis, the coaxial arrangement enables the structural layout to be novel and compact, the power transmission chain is short, the transmission efficiency is high, the two motors can be driven independently or jointly, various power output modes are realized, the vehicle can run efficiently, and the power requirements of various loads and various working conditions of commercial vehicles are met.
Drawings
FIG. 1 is a schematic structural view of a coaxial electric drive bridge according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a transmission assembly in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first gear power transmission driven by a first motor according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a second gear power transmission driven by a first motor according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a third gear power transmission driven by a second motor according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a fourth gear power transmission driven by a second motor according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of power transmission in fifth gear under the combined drive of a first motor and a second motor according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a sixth-gear power transmission under combined driving of a first motor and a second motor according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a sliding sleeve type shift mechanism according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope 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. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
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 and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 a specific case to those of ordinary skill in the art.
As shown in fig. 1-9, a coaxial electric drive axle comprises at least one electric machine, at least one transmission assembly 3, a main shaft 4 and two half shafts connected by a differential 14,
in the embodiment, the two motors are a first motor 1 and a second motor 2 respectively, the two half shafts are a first half shaft 15 and a second half shaft 16 respectively,
the main shaft 4 is fixedly connected with a shell of the differential 14, and the main shaft 4 is sleeved on the two half shafts;
each motor is connected with a corresponding transmission component in a transmission way, in the embodiment, the transmission component 3 is clamped between the first motor 1 and the second motor 2 and is symmetrically arranged, two sides of the first motor 1 are respectively connected with the transmission component 3 and the first half shaft 15, two sides of the second motor 2 are respectively connected with the transmission component 3 and the second half shaft 16,
when the coaxial electric drive axle is in a transmission mode, the transmission assembly 3 is in transmission connection with the main shaft 4 or the housing of the differential 14,
the electric motor, the main shaft and the two half shafts have the same axis, i.e. in this embodiment the first electric motor 1, the second electric motor 2, the first half shaft 15, the second half shaft 16 and the main shaft 4 have the same axis.
The first motor 1 drives the main shaft 4 to rotate, the main shaft 4 transmits power to the first half shaft 15 and the second half shaft 16 through the transmission assembly 3, similarly, the second motor 2 drives the main shaft 4 to rotate, the main shaft 4 transmits power to the first half shaft 15 and the second half shaft 16 through the transmission assembly 3, namely, the motors transmit power to the first half shaft 15 and the second half shaft 16 through the transmission assembly 3, the first half shaft 15 and the second half shaft 16 are in splined connection with the differential 14, power is output and finally transmitted to wheels, power output is achieved, and the vehicle is driven to run, wherein the first motor 1, the second motor 2, the first half shaft 15, the second half shaft 16 and the main shaft 4 have the same axis, so that the structure is compact, the power transmission chain is short, and the transmission efficiency is high.
Specifically, the rotor of each motor has a through hole through which the main shaft 4 passes,
the transmission assembly 3 comprises a sliding sleeve gear shifting mechanism 13 and at least two gear pairs, and the sliding sleeve gear shifting mechanism 13 is sleeved on the main shaft 4 or a shell of the differential 14;
when the coaxial electric drive bridge is in a transmission mode, the sliding sleeve gear shifting mechanism 13 is in transmission connection with the corresponding gear pair; when the coaxial electric drive axle is in a clutch mode, the sliding sleeve gear shifting mechanism 13 is disconnected from the corresponding gear pair in transmission.
Each transmission component 3 comprises an intermediate shaft and at least two gear pairs, at least one gear pair is used for the transmission connection of the motor and the intermediate shaft,
when the coaxial electric drive axle is in drive mode, at least one gear pair is used for the drive connection of the intermediate shaft to the main shaft 4 or to the housing of the differential 14.
When the number of the motors is two, the transmission assembly 3 comprises at least three gear pairs, and at least one gear pair is used for driving and connecting the corresponding motor and the intermediate shaft;
when the coaxial electric drive bridge is in a transmission mode, at least two gear pairs are used for driving and connecting the intermediate shaft with a main shaft or a shell of a differential mechanism.
Each gear pair comprises a first gear wheel provided on the intermediate shaft and a second gear wheel provided on the housing of the main shaft 4 or of the differential 14.
The two transmission assemblies 3 are symmetrically arranged on two sides of the main shaft 4;
the coaxial electric drive bridge also comprises a control unit which is electrically connected with the motor and the sliding sleeve gear shifting mechanism 13, wherein the control unit is used for controlling the transmission assembly 3, controlling the sliding sleeve gear shifting mechanism 13 to be in transmission connection with the corresponding gear pair or controlling the starting and stopping of each motor;
in the clutch mode, the shift sleeve gear shift mechanism 13 is controlled to be disconnected from the corresponding gear pair transmission.
In the embodiment, the transmission assembly 3 includes two intermediate shafts, which are a first intermediate shaft 11 and a second intermediate shaft 12, respectively, the main shaft 4, the first intermediate shaft 11 and the second intermediate shaft 12 are arranged in parallel, the main shaft 4 and the differential 14 are integrated into a whole, the first intermediate shaft 11 and the second intermediate shaft 12 are symmetrically arranged on two sides of the main shaft 4,
the transmission assembly 3 includes: the main shaft 4 is provided with a gear I Z1, a gear III Z3, a gear V Z5 and a gear VII Z7 which are respectively arranged on the first intermediate shaft 11 and the second intermediate shaft 12, the gear II Z2, the gear IV Z4, the gear VI Z6 and the gear IV Z8 are arranged on the main shaft 4, the gear II Z2 and the gear IV Z4 are received on a shell of the differential 14 through bearings, the gear VI Z6 is connected with a rotor shaft of the first motor 1, the gear IV Z8 is connected with a rotor shaft of the second motor 2, and the gear shifting mechanism 13 is arranged on the main shaft 4, so that power transmission of two gears can be realized; two sides of the transmission assembly 3 are respectively connected with the first motor 1 and the second motor 2, and a gear six Z6 and a gear eight Z8 of the transmission assembly 3 are respectively connected with rotor shafts of the first motor 11 and the second motor 12, so that power is transmitted to the transmission assembly 3, and power input is realized.
A first gear pair consisting of a first gear Z1 and a second gear Z2 forms a 1-gear speed change; a second gear pair consisting of a gear three Z3 and a gear four Z4 forms a speed-changing 2-gear; each power transmission route finally transmits power to the first half shaft 15 and the second half shaft 16 and then to wheels, so that power output is realized, and the vehicle is driven to run; a sliding sleeve gear shifting mechanism 13 is arranged between the second gear Z2 and the fourth gear Z4, the sliding sleeve slides to realize switching between different gears, 2 speed change gears can be realized according to different powers, and the sliding sleeve gear shifting mechanism is matched with 2 power motors, so that the electric drive bridge can realize 6 power output modes at most.
The two motors can be set to have the same power and torque, and can also be set to have different powers and torques; two motors can be driven alone, also can jointly drive, and in this embodiment, first motor 1 and second motor 2 set up different power, moment of torsion, can constitute 6 power take off modes at most, can deal with the various application operating mode of vehicle in a flexible way, especially are fit for the automobile that the load variation range is big, the manifold complicacy of operating mode, and concrete 6 power take off modes are as follows:
referring to a power transmission route diagram of the 1 st gear driven by the first single motor 11 shown in fig. 3, in the gear, power input by the first single motor 11 forms a 1 st gear through the eight Z8 gear, the seven Z7 gear, the first intermediate shaft 11, the second intermediate shaft 12, the first Z1 gear and the second Z2 gear of the transmission assembly 3, then the power is transmitted to the differential 14 through the sliding sleeve gear shifting mechanism 13, and then the power is output to wheels through the first half shaft 15 and the second half shaft 16;
referring to a 2-gear power transmission route diagram driven by the first single motor 11 shown in fig. 4, in the gear, power input by the first single motor 11 forms a 2-gear speed change through the eight Z gear 8, the seven Z gear 7, the first intermediate shaft 11, the second intermediate shaft 12, the three Z gear 3 and the four Z gear 4 of the transmission assembly 3, then the power is transmitted to the differential 14 through the sliding sleeve gear shifting mechanism 13, and then the power is output to wheels through the first half shaft 15 and the second half shaft 16;
referring to a 3-gear power transmission route diagram of the second electric machine 2 shown in fig. 5, in the gear, power input by the second electric machine 2 forms a 3-gear speed change through the eight Z8 gear, the seven Z7 gear, the first intermediate shaft 11, the second intermediate shaft 12, the first Z1 gear and the second Z2 gear of the transmission assembly 3, then the power is transmitted to the differential 14 through the sliding sleeve gear shifting mechanism 13, and then the power is output to wheels through the first half shaft 15 and the second half shaft 16;
referring to a 4-gear power transmission route diagram of the second electric machine 2 shown in fig. 6, in the gear, power input by the second electric machine 2 forms a 4-gear speed change through the eight Z8 gear, the seven Z7 gear, the first intermediate shaft 11, the second intermediate shaft 12, the three Z3 gear and the four Z4 gear of the transmission assembly 3, then the power is transmitted to the differential 14 through the sliding sleeve gear shifting mechanism 13, and then the power is output to wheels through the first half shaft 15 and the second half shaft 16;
referring to a 5-gear power transmission route diagram under the simultaneous driving of the first motor 1 and the second motor 2 shown in fig. 7, in the gear, the first motor 1 and the second motor 2 are driven jointly, the input power passes through a gear eight Z8, a gear seven Z7, a first intermediate shaft 11, a second intermediate shaft 12, a gear one Z1 and a gear two Z2 of the transmission assembly 3 to form a gear 5 of speed change, the power is transmitted into a differential 14 through a sliding sleeve gear shifting mechanism 13, and the power is output to wheels through a first half shaft 15 and a second half shaft 16;
referring to a 6-gear power transmission route diagram under the simultaneous driving of the first motor 1 and the second motor 2 shown in fig. 8, in the gear, the first motor 1 and the second motor 2 are driven jointly, the input power passes through the eight Z8 gear, the seven Z7 gear, the first intermediate shaft 11, the second intermediate shaft 12, the three Z3 gear, the four Z4 gear of the transmission assembly 3 to form a gear 6, the power is transmitted into the differential 14 through the sliding sleeve gear shifting mechanism 13, and the power is output to the wheels through the first half shaft 15 and the second half shaft 16.
Therefore, according to the coaxial electric drive bridge disclosed by the invention, the first motor 1, the second motor 2, the first half shaft 15, the second half shaft 16 and the main shaft 4 have the same axis, so that the structure is compact, the power transmission chain is short, the transmission efficiency is high, the center and the center are coaxially arranged, the structure layout is novel and compact, the power transmission chain is short, and the transmission efficiency is high; meanwhile, the two gears are transmitted only through two stages of power, the transmission efficiency reaches more than 95%, and the energy consumption of vehicle operation is reduced to the maximum extent. The two motors can be set to have the same power and torque, and can also be set to have different powers and torques; the two motors can be driven independently or jointly, 6 power output modes can be formed at most, various application working conditions of the vehicle can be flexibly coped, and the vehicle is particularly suitable for commercial vehicles with large load variation range and various and complicated working conditions. The two-gear transmission electric drive bridge is applied to the electric commercial vehicle, can meet the requirement of the maximum traction force of the electric commercial vehicle during climbing, and can meet the requirement of the maximum vehicle speed.
Specifically, as shown in fig. 9, an exemplary structure of the sliding sleeve type shift mechanism 13 includes a sliding sleeve 21, and the sliding sleeve 21 is disposed on the shaft through a spline sleeve, so that the sliding sleeve 21 slides between the engaging teeth of the third gear 22 and the engaging teeth of the fourth gear 23. The outer surface of the sliding bush 21 is provided with external teeth, and the inner surfaces of the third gear 22 and the fourth gear 23 are provided with internal teeth; when the sliding sleeve 21 slides to a position where transmission is needed, the external teeth of the sliding sleeve 21 can be meshed with the engaging teeth of the third gear 22 or the fourth gear 23 for power transmission.
In addition, the main shaft 4 and the axle differential 14 can be designed integrally, so that the structure is simple, the space is saved, and the structure is more compact. The gears on the first intermediate shaft 11 and the second intermediate shaft 12 can be designed uniformly, the composition structure is simple, the production management is facilitated, and the related cost is reduced. The motor and the transmission assembly 3 are fixedly mounted on the axle housing of the axle through the bracket, so that the working environment of the motor, the speed change system and other related parts can be stable and reliable, and the operation is safe and efficient. And the axle housing should also have the structure and interface of installation stopper, brake chamber, installing support and ABS sensor subassembly to satisfy the functional demand of stroke and parking braking.
The motor can be a permanent magnet synchronous motor, a switched reluctance motor or an induction motor, can be a series of different powers and torques, and is configured according to different vehicle types and application working conditions.
The invention further provides an automobile which comprises the coaxial electric drive bridge. It should be noted that the coaxial dual-motor and two-gear speed change system can meet the requirements of different gears of 6 gears at most, can be applied to an electric drive axle assembly of a commercial vehicle, and can also be applied to electric drive axles of other transport vehicles with similar functions to the electric commercial vehicle.
In conclusion, the coaxial double-motor commercial vehicle electric drive bridge disclosed by the invention can be used for selectively setting different specific speed ratios according to different vehicles, different working conditions and loads so as to realize the optimized power and torque transmission of the vehicle, meet the requirements of the vehicle on traction force, speed and efficiency and realize the lowest vehicle energy consumption requirement.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims (9)

1. A coaxial electric drive bridge is characterized by comprising at least one motor, at least one transmission assembly, a main shaft and two half shafts connected through a differential mechanism,
the main shaft is fixedly connected with the shell of the differential mechanism, and the main shaft is sleeved on the two half shafts;
each motor is in transmission connection with the corresponding transmission component,
when the coaxial electric drive bridge is in a transmission mode, each transmission assembly is in transmission connection with the main shaft or the shell of the differential;
the motor, the main shaft and the two half shafts have the same axis.
2. The coaxial electric drive bridge of claim 1, wherein the rotor of each of the electric machines has a through hole for the spindle to pass through.
3. The coaxial electric drive axle of claim 1 wherein each of said transmission assemblies comprises a sliding sleeve shift mechanism and at least two gear pairs, said sliding sleeve shift mechanism being nested on a housing of said main shaft or said differential;
when the coaxial electric drive bridge is in a transmission mode, the sliding sleeve gear shifting mechanism is in transmission connection with the corresponding gear pair;
when the coaxial electric drive bridge is in a clutch mode, the sliding sleeve gear shifting mechanism is disconnected with the corresponding gear pair in transmission.
4. The coaxial electric drive bridge of claim 1, wherein each of said drive assemblies includes an intermediate shaft, at least two gear pairs, at least one of said gear pairs being adapted for driving connection of said electric motor to said intermediate shaft,
when the coaxial electric drive bridge is in a transmission mode, at least one gear pair is used for driving connection between the intermediate shaft and the main shaft or the shell of the differential mechanism.
5. The coaxial electric drive bridge of claim 4, wherein, when there are two of said electric motors, said drive assembly includes at least three gear pairs, at least one of said gear pairs being adapted for driving connection of a respective one of said electric motors to said intermediate shaft;
when the coaxial electric drive bridge is in a transmission mode, at least two gear pairs are used for driving connection between the intermediate shaft and the main shaft or the shell of the differential mechanism.
6. The coaxial electric drive axle of claim 4 wherein each of said gear pairs includes a first gear disposed on an intermediate shaft and a second gear disposed on said main shaft or said differential housing.
7. The coaxial electric drive bridge of claim 1, wherein there are two transmission assemblies, and the two transmission assemblies are symmetrically arranged on two sides of the main shaft; and/or the presence of a gas in the gas,
the number of the motors is two, and the two motors are symmetrically arranged on two sides of the differential mechanism.
8. The coaxial electric drive axle of claim 3, further comprising a control unit electrically connected to the electric motor and the sliding sleeve shift mechanism, the control unit being configured to control the transmission assembly, the sliding sleeve shift mechanism being drivingly connected to the corresponding gear pair, or each of the electric motors being activated or deactivated;
and in a clutch mode, the sliding sleeve gear shifting mechanism is controlled to be disconnected from the corresponding gear pair in transmission.
9. An automobile comprising a coaxial electric drive axle according to any one of claims 1 to 8.
CN202210441229.3A 2022-04-25 2022-04-25 Coaxial electric drive bridge and automobile Pending CN114734813A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210441229.3A CN114734813A (en) 2022-04-25 2022-04-25 Coaxial electric drive bridge and automobile
PCT/CN2022/097258 WO2023206718A1 (en) 2022-04-25 2022-06-07 Coaxial electric drive axle and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210441229.3A CN114734813A (en) 2022-04-25 2022-04-25 Coaxial electric drive bridge and automobile

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CN114734813A true CN114734813A (en) 2022-07-12

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CN (1) CN114734813A (en)
WO (1) WO2023206718A1 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012035750A (en) * 2010-08-06 2012-02-23 Toyota Motor Corp Parking device
CN106945495A (en) * 2017-03-22 2017-07-14 中国煤炭科工集团太原研究院有限公司 Mining driving force adaptive multiple-shift automatic transmission bi-motor steering and driving axle
US20180134142A1 (en) * 2016-11-14 2018-05-17 Ford Global Technologies, Llc Hybrid transaxle
CN109163058A (en) * 2018-10-23 2019-01-08 南京越博动力系统股份有限公司 A kind of horizontal electric drive axle assembly system of bi-motor and shift control method
CN209079653U (en) * 2018-07-25 2019-07-09 一汽解放汽车有限公司 One kind two keeps off coaxial-type electric drive axle
DE102018221601A1 (en) * 2018-12-13 2020-06-18 Zf Friedrichshafen Ag Drive axle of an electric vehicle
CN111365425A (en) * 2020-03-18 2020-07-03 吉泰车辆技术（苏州）有限公司 Three-gear automatic transmission applied to electric automobile
CN112644262A (en) * 2021-01-07 2021-04-13 中国重汽集团济南动力有限公司 Double-motor electric drive axle of belt wheel side speed reducer
CN112706598A (en) * 2021-01-12 2021-04-27 中国重汽集团济南动力有限公司 Vehicle with double-motor drive axle
CN213291964U (en) * 2020-07-31 2021-05-28 韶关市广控机械传动技术有限公司 Two grades of transaxles of bi-motor
CN113978225A (en) * 2021-11-18 2022-01-28 特百佳动力科技有限公司 Distributed electric drive axle system and vehicle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106740023A (en) * 2017-01-13 2017-05-31 苏州绿控传动科技有限公司 The electricity slowed down after a kind of coaxial bi-motor output drives drive axle
US10253857B2 (en) * 2017-01-31 2019-04-09 Dana Heavy Vehicle Systems Group, Llc Multi-speed electric transaxle unit with co-axial shafts
CN107985068A (en) * 2017-11-28 2018-05-04 合肥工业大学 A kind of power assembly and its operating mode of pure electric automobile bi-motor configuration
CN108819690A (en) * 2018-06-29 2018-11-16 北京新能源汽车股份有限公司 Vehicle
CN112277612B (en) * 2019-07-25 2023-05-09 宇通客车股份有限公司 Electric drive system and electric vehicle
CN216069585U (en) * 2021-11-19 2022-03-18 无锡沃尔福汽车技术有限公司 Coaxial electric drive axle
CN114771242A (en) * 2022-04-25 2022-07-22 特百佳动力科技有限公司 Coaxial electric drive bridge and automobile

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012035750A (en) * 2010-08-06 2012-02-23 Toyota Motor Corp Parking device
US20180134142A1 (en) * 2016-11-14 2018-05-17 Ford Global Technologies, Llc Hybrid transaxle
CN106945495A (en) * 2017-03-22 2017-07-14 中国煤炭科工集团太原研究院有限公司 Mining driving force adaptive multiple-shift automatic transmission bi-motor steering and driving axle
CN209079653U (en) * 2018-07-25 2019-07-09 一汽解放汽车有限公司 One kind two keeps off coaxial-type electric drive axle
CN109163058A (en) * 2018-10-23 2019-01-08 南京越博动力系统股份有限公司 A kind of horizontal electric drive axle assembly system of bi-motor and shift control method
DE102018221601A1 (en) * 2018-12-13 2020-06-18 Zf Friedrichshafen Ag Drive axle of an electric vehicle
CN111365425A (en) * 2020-03-18 2020-07-03 吉泰车辆技术（苏州）有限公司 Three-gear automatic transmission applied to electric automobile
CN213291964U (en) * 2020-07-31 2021-05-28 韶关市广控机械传动技术有限公司 Two grades of transaxles of bi-motor
CN112644262A (en) * 2021-01-07 2021-04-13 中国重汽集团济南动力有限公司 Double-motor electric drive axle of belt wheel side speed reducer
CN112706598A (en) * 2021-01-12 2021-04-27 中国重汽集团济南动力有限公司 Vehicle with double-motor drive axle
CN113978225A (en) * 2021-11-18 2022-01-28 特百佳动力科技有限公司 Distributed electric drive axle system and vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
赵迁等: "动力换挡两挡变速器的整车搭载与动力性试验", 《车辆与动力技术》 *

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