CN110406372A - Multi-mode transmission system and control method and drive mode switching device - Google Patents

Multi-mode transmission system and control method and drive mode switching device Download PDF

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Publication number
CN110406372A
CN110406372A CN201910709489.2A CN201910709489A CN110406372A CN 110406372 A CN110406372 A CN 110406372A CN 201910709489 A CN201910709489 A CN 201910709489A CN 110406372 A CN110406372 A CN 110406372A
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CN
China
Prior art keywords
drive mode
gear
switching device
drive
driving
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Application number
CN201910709489.2A
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Chinese (zh)
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CN110406372B (en
Inventor
陈志河
朱黎明
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Shanghai Aiji Automobile Technology Co Ltd
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Shanghai Aiji Automobile Technology Co Ltd
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Priority to CN201910709489.2A priority Critical patent/CN110406372B/en
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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
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • 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
    • B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention provides a kind of multi-mode transmission system and control methods and drive mode switching device, are related to art drive systems field, which includes intermediate gear and gear mobile unit interconnected；The gear mobile unit is for moving intermediate gear, so that the intermediate gear is engaged with the straight axle shaft gear that drives, perhaps it engages with the input gear of differential mechanism or is separated with the straight input gear for driving axle shaft gear and differential mechanism, to realize the switching between different driving mode.The robustness and overall efficiency of drive system can be improved in drive mode switching device provided in an embodiment of the present invention, and drive system is made to have better handling and dynamic property.

Description

Multi-mode transmission system and control method and drive mode switching device
Technical field
The present invention relates to art drive systems fields, more particularly, to a kind of multi-mode transmission system and control method and drive Dynamic mode-changeover device.
Background technique
The drive mode of pure electric automobile is broadly divided into centralization driving and distributed two kinds of driving.
Centralized drive mode only has a power source, and driving power is by speed changer, main reducing gear, differential mechanism by power It is assigned to each driving wheel.Most current automobile is using centralized driving method, and by forging for many years, centralization is driven Dynamic technology is very mature, but the torque of its two sides wheel is balanced by differential mechanism, cannot achieve the only of single wheel Vertical control, this forms very big obstacle for improving the control stability of automobile.
Distributed drive mode is that each driving wheel has independent driving motor, and each driving motor can carry out independence Control, distributed-driving electric automobile provide better hardware item for the dynamics Controlling levels of the following intelligent automobile Part.Using the electric car of distributed drive mode, control stability can be promoted by outstanding control algolithm and in complexity The passability on road surface, and have steering assistance control function.Existing distribution drive system is largely that hub motor is driven It is dynamic, it is added significantly to nonspring carried mass and reduces the reliability of drive system.Once unilateral distribution drive system failure, two Imbalance will occur in side driving moment, it cannot be guaranteed that vehicle continues safety high speed traveling.
Generally, existing centralized drive system is handling bad；And the Shandong of existing more motor distribution drive systems Stick is lower, and overall efficiency is bad.
Summary of the invention
It is cut in view of this, the purpose of the present invention is to provide a kind of multi-mode transmission systems and control method with drive mode Changing device, can be improved the robustness and overall efficiency of drive system, and it is preferably handling and dynamic that drive system is had Power.
In a first aspect, being applied to transmission system, the driving the embodiment of the invention provides a kind of drive mode switching device Mode-changeover device is circumscribed with power output device；The power output device includes straight drive axle shaft gear and differential mechanism；The mode Switching device includes intermediate gear and gear mobile unit interconnected；The gear mobile unit is used to move intermediate gear, So that the intermediate gear is engaged with the straight axle shaft gear that drives, perhaps engages or directly driven with this partly with the input gear of the differential mechanism The input gear of shaft gear and the differential mechanism separates, to realize the switching between different driving mode.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein should Mode-changeover device is also circumscribed with power input device；The power input device includes deceleration device；The gear mobile unit packet Include: guide ring, outer reset spring, interior reset spring, reset spring pressing plate, electromagnetic coil driver exterior loop, electromagnetic coil swash Encourage device interior loop, armature ring and guiding pull ring；The guide ring is connected with the intermediate gear；The both ends of the outer reset spring respectively with The inner face of the low speed end tooth wheel of the deceleration device is connected with the end face outside of the intermediate gear；The reset spring pressing plate subtracts with this The low speed end tooth wheel of speed variator is connected；The both ends of the interior reset spring respectively with the reset spring pressing plate and the intermediate gear phase Even；The both ends of the guiding pull ring are connected with the intermediate gear and the armature ring respectively；The electromagnetic coil driver exterior loop and should Electromagnetic coil driver interior loop is for generating electromagnetic force so that the armature ring is mobile, to drive the intermediate gear mobile.
With reference to first aspect, the embodiment of the invention provides second of possible embodiments of first aspect, wherein should Mode-changeover device is also circumscribed with power input device；The power input device includes deceleration device；The gear mobile unit packet It includes: driver, lead screw, feed screw nut, shift fork-feed screw nut connection shaft, shift fork fixed pin, shift fork, sliding block and sheave；This swashs Device, the lead screw and the feed screw nut is encouraged to be sequentially connected；The feed screw nut connects shaft and the shift fork by the shift fork-feed screw nut It is connected；The shift fork is connected with the sliding block；The shift fork fixed pin is for fixing the shift fork；The sliding block is embedded in the guide groove of the sheave In, which is connected with the intermediate gear；The intermediate gear is connected with the deceleration device；The lead screw is under the driving of the driver Rotation, to drive the feed screw nut mobile, which drives the shift fork to swing, which drives the sheave by the sliding block Mobile, which drives the intermediate gear mobile.
Second aspect, the embodiment of the invention also provides a kind of multi-mode transmission systems, comprising: driving motor, slow down dress It sets, the drive mode switching device that differential mechanism and one of above-mentioned first aspect and its possible embodiment provide；Driving electricity Machine, the deceleration device and the drive mode switching device are sequentially connected；The driving motor passes through the deceleration device to the driving mould Formula switching device provides power input；The drive mode switching device is for switching different drive modes with output power；It should Drive mode includes centralized drive mode, distributed drive mode and power output interrupt mode；When the drive mode is collection When Chinese style drive mode, the intermediate gear in the drive mode switching device is engaged with the input gear of the differential mechanism；When this When drive mode is distributed drive mode, the intermediate gear in the drive mode switching device directly drives axle shaft gear with this and nibbles It closes；The intermediate gear and the straight drive when the drive mode is power output interrupt mode, in the drive mode switching device The input gear of axle shaft gear and the differential mechanism separates.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein should Deceleration device includes speed end gear and low speed end tooth wheel；The differential mechanism includes input gear, the first axle shaft gear, the second semiaxis Gear, planetary gear and planetary gear cross axle；The speed end gear is connected with the low speed end tooth wheel, the rotor of the driving motor It is connected with the speed end gear, which is connected with the intermediate gear；This directly drives axle shaft gear and first half axle gear Wheel is connected by semiaxis with wheel end；The input gear is connected with the planetary gear cross axle；The planetary gear and the planet tooth Take turns cross shaft rotating connection；The planetary gear is meshed with first axle shaft gear and second axle shaft gear；First semiaxis Gear and second axle shaft gear are connect with the planetary gear cross shaft rotating respectively.
In conjunction with the possible embodiment of the first of second aspect or second aspect, the embodiment of the invention provides second party The possible embodiment of second of face, wherein the driving motor includes the first driving motor and the second driving motor, the deceleration Device includes the first deceleration device and the second deceleration device, which includes the first drive mode switching device With the second drive mode switching device；First driving motor, first deceleration device and the first drive mode switching device It is sequentially connected；Second driving motor, second deceleration device and the second drive mode switching device are sequentially connected；This first Drive mode switching device and the second drive mode switching device realize different driving combinations by switching drive mode； Driving combination includes: the driving of bi-motor distribution, bi-motor centralization driving in parallel, the driving of single motor centralization, combined drive Dynamic and power output is interrupted；The combination drive is that any of first driving motor and second driving motor driving motor are Centralization driving, another is distributed driving.
The third aspect, the embodiment of the invention also provides a kind of multi-mode transmission system control method, this method is based on the The multi-mode transmission system that second of possible embodiment of two aspects provides is realized, this method comprises: judging the first driving Whether motor and the second driving motor are in normal operating conditions；When the first driving motor and the second driving motor are in normally When working condition, the first drive mode switching device and the second drive mode are selected according to wheel end torque demand and current vehicle speed value The driving of switching device is combined；When any one driving motor in the first driving motor and the second driving motor is in improper work When making state, it is defeated that control drive mode switching device corresponding with the driving motor of abnormal operating state is in is switched to power Interrupt mode out, and the corresponding drive mode switching device of driving motor in normal operating conditions is switched to centralized drive Dynamic model formula；When first driving motor and second driving motor are in abnormal operating state, first driving is controlled Mode-changeover device and the second drive mode switching device are switched to power output interrupt mode.
In conjunction with the third aspect, the embodiment of the invention provides the first possible embodiments of the third aspect, wherein should The first drive mode switching device and second drive mode is selected to switch dress according to wheel end torque demand and current vehicle speed value The step of driving combination set includes: but to be not at first when wheel end torque demand and current vehicle speed value are in the second high efficient district When high efficient district and third high efficient district, controls the second drive mode switching device and be switched to centralized drive mode, first drive Dynamic mode-changeover device is switched to power output interrupt mode；First high efficient district is when the driving group is combined into single motor centralization Driving, and when the second drive mode switching device is centralized drive mode, the efficient region of the multi-mode transmission system； Second high efficient district is to drive when the driving group is combined into single motor centralization, and the first drive mode switching device is to concentrate When formula drive mode, the efficient region of the multi-mode transmission system；The third high efficient district is when the driving group is combined into bi-motor point When cloth driving or bi-motor centralization in parallel drive, the efficient region of the multi-mode transmission system；When the wheel end torque demand When being in the first high efficient district with the current vehicle speed value, but being not at the second high efficient district and third high efficient district, first driving is controlled Mode-changeover device is switched to centralized drive mode, which is switched to power output and interrupts mould Formula；When the wheel end torque demand and the current vehicle speed value be in third high efficient district, but it is not at the first high efficient district and second efficient Qu Shi controls driving combination and is switched to bi-motor centralization driving in parallel.
In conjunction with the first possible embodiment of the third aspect, the embodiment of the invention provides second of the third aspect Possible embodiment, wherein this method further include: when the wheel end torque demand is greater than the first torque threshold and turns round less than second Square threshold value when the current vehicle speed is less than the first speed threshold value, controls the second drive mode switching device and is switched to centralized drive Dynamic model formula, the first drive mode switching device are switched to power output interrupt mode；First torque threshold is, when this second Drive mode switching device is centralized drive mode, when which is power output interrupt mode, The most bull wheel end torque of the external characteristic curve at the wheel end；Second torque threshold is, when the first drive mode switching device is Centralized drive mode, when which is power output interrupt mode, the external characteristic curve at the wheel end Most bull wheel end torque；The first speed threshold value is, when which is combined into the driving of bi-motor distribution, the external characteristics at the wheel end The max speed value of curve.
In conjunction with second of possible embodiment of the third aspect, the embodiment of the invention provides the third of the third aspect Possible embodiment, wherein this method further include: when the wheel end torque demand is less than first torque threshold or this is current It when speed is greater than the first speed threshold value, controls the first drive mode switching device and is switched to centralized drive mode, this Two drive mode switching devices are switched to power output interrupt mode.
The embodiment of the present invention bring it is following the utility model has the advantages that
A kind of multi-mode transmission system and control method provided in an embodiment of the present invention and drive mode switching device, the drive Dynamic mode-changeover device is applied to transmission system, which is circumscribed with power output device；The power output Device includes straight drive axle shaft gear and differential mechanism；The mode-changeover device includes that intermediate gear and gear interconnected are mobile single Member；The gear mobile unit is for moving intermediate gear so that the intermediate gear is engaged with straight drive axle shaft gear, or with the difference The input gear of fast device engages, or directly drives axle shaft gear with this and the input gear of the differential mechanism separates, to realize difference Switching between drive mode.The drive mode switching device can control the position of intermediate gear to change torque output road Diameter, the intermediate gear may be coupled to the straight axle shaft gear that drives and directly output torque to wheel end；Or it is connected to the defeated of differential mechanism Enter gear and output torque to differential mechanism, wheel end is output to after differential mechanism；Or it is placed in straight drive axle shaft gear and differential mechanism Input gear middle position, be all not connected to the input gear of axle shaft gear and differential mechanism, thus be disconnected to wheel end torque Transmitting drags loss to reduce.The robustness and overall efficiency of drive system can be improved in the drive mode switching device, and makes Obtaining drive system has better handling and dynamic property.
Other feature and advantage of the disclosure will illustrate in the following description, alternatively, Partial Feature and advantage can be with Deduce from specification or unambiguously determine, or by implement the disclosure above-mentioned technology it can be learnt that.
To enable the above objects, features, and advantages of the disclosure to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of drive mode switching device provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another drive mode switching device provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another drive mode switching device provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of multi-mode transmission system provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another multi-mode transmission system provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another multi-mode transmission system provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another multi-mode transmission system provided in an embodiment of the present invention；
Fig. 8 is a kind of flow diagram of multi-mode transmission system control method provided in an embodiment of the present invention；
Fig. 9 is a kind of performance plot of multi-mode transmission system provided in an embodiment of the present invention.
Icon: 10- drive mode switching device；11- intermediate gear；12- gear mobile unit；2121- deceleration device Planetary gear shaft；The low speed end tooth wheel of 211- deceleration device；708- directly drives axle shaft gear；3021- guide ring；It is resetted outside 3011- Spring；Reset spring in 3012-；3013- reset spring pressing plate；3031- electromagnetic coil driver exterior loop；3032- electromagnetic wire Enclose driver interior loop；3023- armature ring；3022- is oriented to pull ring；3061- lead screw；3062- feed screw nut；3063- shift fork-silk Thick stick nut connects shaft；3064- shift fork fixed pin；3065- shift fork；3066- sliding block；3067- sheave；100- driving motor I； The stator of 101- driving motor I；The rotor of 102- driving motor I；The speed end gear of 201- deceleration device I；202-, which slows down, to be filled Set I；The low speed end tooth wheel of 212- deceleration device I；The reset spring of 301- drive mode switching device I；302- drive mode is cut The intermediate gear of changing device I；The driver of 303- solenoid type drive mode switching device I；306- drive mode switching dress Set the transmission mechanism of I；The driver of 307- fork type drive mode switching device I；400- driving motor II；401- driving motor The stator of II；The rotor of 402- driving motor II；The speed end gear of 501- deceleration device II；502- deceleration device II；512- The low speed end tooth wheel of deceleration device II；The reset spring of 601- drive mode switching device II；602- drive mode switching device The intermediate gear of II；The driver of 603- drive mode switching device II；The transmission mechanism of 606- drive mode switching device II； The driver of 607- drive mode switching device II；The input gear of 701- differential mechanism；The planetary gear cross of 702- differential mechanism Axis；The planetary gear of 703- differential mechanism；The axle shaft gear I of 704- differential mechanism；The axle shaft gear II of 705- differential mechanism；706- directly drives Axle shaft gear I；707- directly drives axle shaft gear II.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Existing pure electric vehicle electric car mainly uses constant-speed ratio retarder or two gear retarders.Wherein, using constant speed Than retarder, overall efficiency cannot be considered in terms of high speed and run at a low speed speed；Though and two grades or multi-speed gear box can improve high speed row The problem of sailing inefficiency, but when bringing shift simultaneously the problem of power interruption.In addition, although power drive system greatly promotes Power performance, but it is handling promoted it is limited.In this context, more motor distribution drive systems become a research heat Door.
However, no matter current more motor distribution drive systems, driven using Direct wheel drives electric wheel hub, although Splendid dynamic property, handling can be obtained, but the failure of any motor all may cause that vehicle power is lost or vehicle loses Surely, system robustness is lower, and system overall efficiency is bad.
Based on this, a kind of multi-mode transmission system and control method provided in an embodiment of the present invention and drive mode switching are filled It sets, the robustness and overall efficiency of drive system can be improved, and make drive system that there is better handling and dynamic property.
To switch to a kind of drive mode disclosed in the embodiment of the present invention fill first convenient for understanding the present embodiment It sets and describes in detail.
Embodiment one:
It is a kind of structural schematic diagram of drive mode switching device, which is applied to transmission system, by Fig. 1 referring to Fig. 1 As it can be seen that the drive mode switching device 10 includes intermediate gear 11 interconnected and gear mobile unit 12.Wherein, the driving Mode-changeover device 10 is circumscribed with power output device；And the power output device includes straight drive axle shaft gear and differential mechanism.
In the drive mode switching device 10, the gear mobile unit 12 is for moving intermediate gear 11, so that in this Between gear 11 engaged with the straight axle shaft gear that drives, perhaps engage with the input gear of the differential mechanism or with the straight drive axle shaft gear It is separated with the input gear of the differential mechanism, to realize the switching between different driving mode.
Here, when intermediate gear 11 is engaged with straight drive axle shaft gear, the drive mode switching device 10 is direct by torque It is output to wheel end；When intermediate gear 11 is engaged with the input gear of the differential mechanism, which passes through difference Fast device outputs torque to wheel end；When the input gear that intermediate gear 11 directly drives with this axle shaft gear and the differential mechanism separates When, which is disconnected the transmitting of torque, and no torque is output to wheel end.
In this way, the drive mode switching device 10 can export road by controlling the position of intermediate gear 11 to change torque Diameter, the intermediate gear 11 may be coupled to the straight axle shaft gear that drives and directly output torque to wheel end；Or it is connected to differential mechanism Input gear outputs torque to differential mechanism, and wheel end is output to after differential mechanism；Or it is placed in straight drive axle shaft gear and differential The input gear middle position of device is all not connected to the input gear of axle shaft gear and differential mechanism, to be disconnected to the torsion at wheel end Square transmitting drags loss to reduce.
Single centralized drive mode or distributed drive mode in compared with the prior art, provide through this embodiment Drive mode switching device 10, may be implemented centralized drive mode and distributed drive mode being integrated into a driving be System, and realizes the free switching between the two drive modes, thus, so that the drive system relative to conventional centralization or The wheel end torque of distributed drive system, speed and high efficient district coverage area are bigger, improve the robustness of drive system and comprehensive Efficiency is closed, so that drive system has better handling and dynamic property.
Drive mode switching device provided in an embodiment of the present invention, the drive mode switching device are applied to transmission system, The drive mode switching device is circumscribed with power output device；The power output device includes straight drive axle shaft gear and differential mechanism； The mode-changeover device includes intermediate gear and gear mobile unit interconnected；The gear mobile unit is for mobile intermediate Gear so that the intermediate gear engage with the straight axle shaft gear that drives, perhaps engage with the input gear of the differential mechanism or with this directly The input gear for driving axle shaft gear and the differential mechanism separates, to realize the switching between different driving mode.The drive mode The robustness and overall efficiency of drive system can be improved in switching device, and it is preferably handling and dynamic that drive system is had Power.
Embodiment two:
In order to be best understood from the drive mode switching device of the offer of above-described embodiment one, driving mould has been somebody's turn to do in the present embodiment introduction Two kinds of specific embodiments of formula switching device.
As shown in Fig. 2, for the structural schematic diagram of one of drive mode switching device, which is circumscribed with Power input device, the power input device include deceleration device.From Figure 2 it can be seen that the drive mode switching device includes straight drives It is axle shaft gear 708, the planetary gear shaft 2121 of deceleration device, the low speed end tooth wheel 211 of deceleration device, guide ring 3021, outer multiple Position spring 3011, intermediate gear 11, interior reset spring 3012, reset spring pressing plate 3013, electromagnetic coil driver exterior loop 3031, electromagnetic coil driver interior loop 3032, armature ring 3023, guiding pull ring 3022.
Wherein, the planetary gear shaft 2121 of above-mentioned deceleration device is connected with the low speed end tooth wheel 211 of deceleration device.Among this Tooth engagement in the low speed end tooth wheel 211 of 11 external tooth of gear and deceleration device, intermediate gear 11 can be along the low speed ends of deceleration device The internal tooth of gear 211 axially moves.The both ends of outer reset spring 3011 are respectively and in the low speed end tooth wheel 211 of deceleration device End face, the end face outside of intermediate gear 11 are connected, and intermediate gear 11 can be pushed to drive half to far from straight under spring force The direction of shaft gear 708 is mobile, realizes and resets to disengage intermediate gear 11 and the straight engagement for driving axle shaft gear 708.Guide ring 3021 are connected with intermediate gear 11, to protect outer reset spring 3011, it are avoided to contact with the straight drive axle shaft gear 708 in rotation And it wears.Reset spring pressing plate 3013 is connected with the low speed end tooth wheel 212 of deceleration device I.The both ends of interior reset spring 3012 point It is not connected with reset spring pressing plate 3013, intermediate gear 11, and intermediate gear 11 can be pushed to drive to straight under spring force 708 direction of axle shaft gear is mobile, is resetted with disengaging the engagement of input gear 701 of intermediate gear 11 and differential mechanism and realizing. The both ends of guiding pull ring 3022 are connected with intermediate gear 11, armature ring 3023 respectively.
Electromagnetism of the armature ring 3023 in electromagnetic coil driver exterior loop 3031 and electromagnetic coil driver interior loop 3032 Field force effect is lower can be to the straight direction for driving axle shaft gear 708 or mobile, the intermediate gear 11 far from the straight direction for driving axle shaft gear 708 By guiding pull ring 3022 and armature ring 3023 linkage being attached thereto, to realize intermediate gear 11 and straight drive axle shaft gear 708 engagement is engaged with the input gear 701 of differential mechanism, and then realizes distributed driving or centralization driving.Work as electricity When magnetic coil driver exterior loop 3031 and electromagnetic coil driver interior loop 3032 do not act on, intermediate gear 11 resets outside Straight drive between axle shaft gear 708 and the input gear 701 of differential mechanism is returned under the action of spring 3011 and interior reset spring 3012 Vacancy, do not engaged with the two, thus realize power transmitting interrupt.
Fig. 2 shows drive mode switching device form a mode switch actuator by two groups of coils, two groups of coils point Not Qu Dong intermediate gear move in or out to realize that centralization driving and the mode of distributed driving, power interruption are cut It changes.The drive mode switching device is simple and compact for structure, and response is fast, at low cost.
Referring to Fig. 3, for the structural schematic diagram of another drive mode switching device, the mode-changeover device is external dynamic Input unit, the power input device include deceleration device.As seen from Figure 3, which includes straight drive semiaxis Gear 708, the planetary gear shaft 2121 of deceleration device, the low speed end tooth wheel 211 of deceleration device, intermediate gear 11, fork type drive The driver 307 of dynamic mode-changeover device I, feed screw nut 3062, shift fork-feed screw nut connection shaft 3063, is dialled lead screw 3061 Pitch fixed pin 3064, shift fork 3065, sliding block 3066, sheave 3067.
Wherein, the driver 307 of fork type drive mode switching device I is connected with lead screw 3061, lead screw 3061 and lead screw Nut 3062 is connected, and feed screw nut 3062 connects shaft 3063 by shift fork-feed screw nut and is connected with shift fork 3065, shift fork 3065 It is connected by shift fork fixed pin 3064 with transmission system cabinet shell, shift fork 3065 is also connected with sliding block 3066, and sliding block 3066 is embedding In the guide groove of sheave 3067, sheave 3067 is connected with intermediate gear 11.Driving backspin of the lead screw 3061 in driver motor Turning, and converts rotational motion into the linear movement of feed screw nut 3062, feed screw nut 3062 drives shift fork 3065 to swing, thus Mobile by the drive sheave 3067 of sliding block 3066 being connected with shift fork, sheave 3067 drives intermediate gear mobile, in final realization Between gear directly driving the position change between axle shaft gear 708 and the input gear 701 of differential mechanism, with realize distributed driving, The pattern switching that centralization driving and power transmission are interrupted.
Drive mode switching device shown in Fig. 3 is made of pattern switching motor, lead screw, feed screw nut, shift fork, and mode is cut The rotation of motor driven lead screw is changed, so that feed screw nut is driven to move axially along lead screw, the shift fork top being connected with feed screw nut Shaft drives the mobile position to change intermediate gear of shift fork with the movement of feed screw nut, so that implementation pattern switches.By Self-locking and torque amplification in screw mechanism, the drive mode switching device function-stable is reliable, more energy efficient.
Embodiment three:
The embodiment of the invention also provides a kind of multi-mode transmission systems, comprising: driving motor, deceleration device, differential mechanism The drive mode switching device provided with one of above-described embodiment one, embodiment two and its possible embodiment.
Wherein, the driving motor, the deceleration device and the drive mode switching device are sequentially connected；The driving motor passes through The deceleration device provides power input to the drive mode switching device；The drive mode switching device is for switching different drives Dynamic model formula is with output power；The drive mode includes that centralized drive mode, distributed drive mode and power output interrupt mould Formula.
When the drive mode is distributed drive mode, the intermediate gear in the drive mode switching device is straight with this Drive axle shaft gear engagement；The center tooth when the drive mode is centralized drive mode, in the drive mode switching device Wheel is engaged with the input gear of the differential mechanism；When the drive mode is power output interrupt mode, drive mode switching dress Axle shaft gear is directly driven with this for the intermediate gear in setting and the input gear of the differential mechanism separates.
In a kind of wherein possible embodiment, above-mentioned deceleration device includes speed end gear and low speed end tooth wheel, and And the differential mechanism includes input gear, the first axle shaft gear, the second axle shaft gear, planetary gear and planetary gear cross axle.Its In, which is connected with the low speed end tooth wheel, and the rotor of the driving motor is connected with the speed end gear, the low speed end Gear is connected with the intermediate gear；This directly drives axle shaft gear and first axle shaft gear passes through semiaxis and is connected with wheel end；This is defeated Enter gear to be connected with the planetary gear cross axle；The planetary gear is connect with the planetary gear cross shaft rotating；The planetary gear It is meshed with first axle shaft gear and second axle shaft gear；First axle shaft gear and second axle shaft gear respectively with Planetary gear cross shaft rotating connection.
In alternatively possible embodiment, above-mentioned driving motor includes the first driving motor and the second driving motor, Above-mentioned deceleration device includes the first deceleration device and the second deceleration device, and above-mentioned drive mode switching device includes the first driving mould Formula switching device and the second drive mode switching device.Also, first driving motor, first deceleration device and first drive Dynamic mode-changeover device is sequentially connected；Second driving motor, second deceleration device and the second drive mode switching device It is sequentially connected.
Further, the first drive mode switching device and the second drive mode switching device pass through switching driving mould Formula is to realize different driving combinations；Driving combination include: the driving of bi-motor distribution, bi-motor centralization driving in parallel, The driving of single motor centralization, combination drive and power output are interrupted.
Wherein, when above-mentioned driving group is combined into the driving of bi-motor distribution, two driving motors pass through deceleration device respectively Direct output power drives unilateral wheel to two semiaxis, without passing through differential mechanism.
When above-mentioned driving group, which is combined into bi-motor centralization in parallel, to be driven, two driving motors, which will pass through deceleration device, to be moved Power is output to the input gear of differential mechanism, then is respectively outputted to two sides wheel by differential mechanism.
When above-mentioned driving group is combined into the driving of single motor centralization, any driving motor is separated with transmission system, while another One driving motor centralization driving, i.e., output power to the input gear of differential mechanism by deceleration device.
When above-mentioned driving group is combined into combination drive, which is first driving motor and second driving motor Any of driving motor be centralization driving, another is distributed driving.That is, any driving motor centralization driving, Two sides wheel is transferred torque to by differential mechanism, while another driving motor directly drives its side wheel.
When above-mentioned driving group, which is combined into power output, interrupts, for example, when stationary vehicle or the transmission shaft are as driven shaft, To reduce loss, two driving motors are separated with transmission system.
Further, above-mentioned first deceleration device and the second deceleration device can use identical or different reduction ratio, adopt When with different reduction ratio, keep the first driving motor and the second driving motor different to the speed ratio at wheel end.When system is driven with concentrating When dynamic mode activated, different driving electricity can be selected according to the difference of vehicle driving-cycle (such as speed, driving torque demand) Machine, so that drive efficiency be made to be optimal.
Example IV:
In order to be best understood from above-mentioned multi-mode transmission system, the present embodiment also describes the tool of four kinds of multi-mode transmission systems Body embodiment.It is described below:
It referring to fig. 4, is a kind of structural schematic diagram of multi-mode transmission system, from fig. 4, it can be seen that the transmission system includes driving Dynamic motor I100；The stator 101 of driving motor I；The rotor 102 of driving motor I；The speed end gear 201 of deceleration device I；Subtract Speed variator I202；The low speed end tooth wheel 212 of deceleration device I；The reset spring 301 of solenoid type drive mode switching device I； The intermediate gear 302 of drive mode switching device I；The driver 303 of solenoid type drive mode switching device I；Driving electricity Machine II400；The stator 401 of driving motor II；The rotor 402 of driving motor II；The speed end gear 501 of deceleration device II；Subtract Speed variator II502；The low speed end tooth wheel 512 of deceleration device II；The reset spring of solenoid type drive mode switching device II 601；The intermediate gear 602 of drive mode switching device II；The driver 603 of solenoid type drive mode switching device II； The input gear 701 of differential mechanism；The planetary gear cross axle 702 of differential mechanism；The planetary gear 703 of differential mechanism；The half of differential mechanism Shaft gear I704；The axle shaft gear II705 of differential mechanism；It is straight to drive axle shaft gear I706；It is straight to drive axle shaft gear II707.
The rotor 102 of driving motor I is connected with the speed end gear 201 of deceleration device I, the high speed contrate-gear-type of deceleration device I Wheel 201 is connected by deceleration device I202 with the low speed end tooth wheel 212 of deceleration device I, the low speed end tooth wheel 212 of deceleration device I It is connected with the intermediate gear 302 of drive mode switching device I, the intermediate gear 302 and electromagnetic coil of drive mode switching device I The reset spring 301 of formula drive mode switching device I is connected, under the action of driver and reset spring, drive mode switching The intermediate gear 302 of device I can be moved along the gear teeth of the low speed end tooth wheel 212 for the deceleration device I being attached thereto, and work as center tooth When wheel is mobile to straight drive axle shaft gear I706 under the action of driver, finally it is connected with the straight axle shaft gear I706 that drives, thus real The distributed driving of existing driving motor I100；When intermediate gear moves under the action of driver to the input gear of differential mechanism 701 When dynamic, finally it is connected with the input gear of differential mechanism 701, to realize the centralization driving of driving motor I100；Work as center tooth When wheel is intermediate positioned at the input gear 701 of straight drive axle shaft gear I706 and differential mechanism, axle shaft gear I706 and differential mechanism are driven with straight Input gear 701 disconnect, at this time driving motor I100 stop torque being output to wheel.It is straight to drive axle shaft gear I706 and differential The axle shaft gear I704 of device is directly connected by semiaxis with wheel；The input gear 701 of differential mechanism and the planet tooth of differential mechanism Cross axle 702 is taken turns to be connected；The planetary gear cross axle 702 of differential mechanism is connected with the planetary gear 703 of differential mechanism, and planetary gear can Around planetary gear cross shaft rotating；The planetary gear 703 and the axle shaft gear I704 of differential mechanism and the semiaxis of differential mechanism of differential mechanism Gear II705 is meshed；The planetary gear cross axle 702 and the axle shaft gear I704 of differential mechanism and the semiaxis of differential mechanism of differential mechanism Gear II705 is connected, and the axle shaft gear II705 of the axle shaft gear I704 of differential mechanism and differential mechanism can be around the planet tooth of differential mechanism Cross axle 702 is taken turns to rotate.
The rotor 402 of driving motor II is connected with the speed end gear 501 of deceleration device II；The speed end of deceleration device II Gear 501 is connected by deceleration device II502 with the low speed end tooth wheel 512 of deceleration device II；The low speed end tooth of deceleration device II Wheel 512 is connected with the intermediate gear 602 of drive mode switching device II；The intermediate gear 602 of drive mode switching device II with The reset spring 601 of solenoid type drive mode switching device II is connected；Under the action of driver and reset spring, driving The intermediate gear 602 of mode-changeover device II can be moved along the gear teeth of the low speed end tooth wheel 512 for the deceleration device II being attached thereto It is dynamic, when intermediate gear is mobile to straight drive axle shaft gear II707 under the action of driver, axle shaft gear finally is driven with straight II707 is connected, to realize the distributed driving of driving motor II400；When intermediate gear under the action of driver to differential When the input gear 701 of device is mobile, finally it is connected with the input gear of differential mechanism 701, to realize the collection of driving motor II400 Chinese style driving；When intermediate gear is intermediate positioned at the input gear 701 of straight drive axle shaft gear II707 and differential mechanism, driven partly with straight The input gear 701 of shaft gear II707 and differential mechanism disconnects, and the torque of driving motor II400 stopping at this time being output to wheel.Directly Axle shaft gear II707 is driven directly to be connected by semiaxis wheel with the axle shaft gear II705 of differential mechanism.
Referring to Fig. 5, for the structural schematic diagram of another multi-mode transmission system.The transmission system will be schemed compared with Fig. 4 Deceleration device I202 and deceleration device II502 is changed to level-one parallel-axes gears deceleration mechanism knot by double planet wheel rows of mixing deceleration mechanism in 4 Unify grade planet row deceleration mechanism, so that driving motor be allow to become parallel-axis type from coaxial-type, overall structure is more flat, and Driving motor is more general.Other component parts of transmission system shown in Fig. 5 are identical as the transmission system in Fig. 4, herein no longer It repeats.
The structural schematic diagram of Fig. 6 another multi-mode transmission system provided in an embodiment of the present invention.The transmission system includes Driving motor I100；The stator 101 of driving motor I；The rotor 102 of driving motor I；The speed end gear 201 of deceleration device I； Deceleration device I202；The low speed end tooth wheel 212 of deceleration device I；The intermediate gear 302 of drive mode switching device I；Fork type drives The transmission mechanism 306 of dynamic mode-changeover device I；The driver 307 of fork type drive mode switching device I；Driving motor II400；The stator 401 of driving motor II；The rotor 402 of driving motor II；The speed end gear 501 of deceleration device II；Slow down Device II502；The low speed end tooth wheel 512 of deceleration device II；The intermediate gear 602 of drive mode switching device II；Fork type drives The transmission mechanism 606 of dynamic mode-changeover device II；The driver 607 of fork type drive mode switching device II；Differential mechanism it is defeated Enter gear 701；The planetary gear cross axle 702 of differential mechanism；The planetary gear 703 of differential mechanism；The axle shaft gear I704 of differential mechanism； The axle shaft gear II705 of differential mechanism；It is straight to drive axle shaft gear I706；It is straight to drive axle shaft gear II707.
The rotor 102 of driving motor I is connected with the speed end gear 201 of deceleration device I, the high speed contrate-gear-type of deceleration device I Wheel 201 is connected by deceleration device I202 with the low speed end tooth wheel 212 of deceleration device I, the low speed end tooth wheel 212 of deceleration device I It is connected with the intermediate gear 302 of drive mode switching device I, the intermediate gear 302 and fork type of drive mode switching device I drives The transmission mechanism 306 of dynamic mode-changeover device I is connected, the transmission mechanism 306 and fork type of fork type drive mode switching device I The driver 307 of drive mode switching device I is connected；Under the driving of driver, transmission mechanism pushes drive mode switching dress The intermediate gear 302 for setting I can be moved along the gear teeth of the low speed end tooth wheel 212 for the deceleration device I being attached thereto, and work as intermediate gear When mobile to straight drive axle shaft gear I706 under the action of driver and transmission mechanism, axle shaft gear I706 phase finally is driven with straight Even, to realize the distributed driving of driving motor I100；When intermediate gear under driver and transmission mechanism effect to differential When the input gear 701 of device is mobile, finally it is connected with the input gear of differential mechanism 701, to realize the collection of driving motor I100 Chinese style driving；When intermediate gear is intermediate positioned at the input gear 701 of straight drive axle shaft gear I706 and differential mechanism, semiaxis is driven with straight The input gear 701 of gear I706 and differential mechanism disconnects, and the torque of driving motor I100 stopping at this time being output to wheel.It is straight to drive half The axle shaft gear I704 of shaft gear I706 and differential mechanism is directly connected by semiaxis with wheel；The input gear 701 of differential mechanism It is connected with the planetary gear cross axle 702 of differential mechanism；The planetary gear cross axle 702 of differential mechanism and the planetary gear of differential mechanism 703 are connected, and planetary gear can be around planetary gear cross shaft rotating；The planetary gear 703 of differential mechanism and the axle shaft gear of differential mechanism The axle shaft gear II705 of I704 and differential mechanism is meshed；The planetary gear cross axle 702 of differential mechanism and the axle shaft gear of differential mechanism I704 is connected with the axle shaft gear II705 of differential mechanism, and the axle shaft gear II705 of the axle shaft gear I704 of differential mechanism and differential mechanism It can be rotated around the planetary gear cross axle 702 of differential mechanism.
The rotor 402 of driving motor II is connected with the speed end gear 501 of deceleration device II；The speed end of deceleration device II Gear 501 is connected by deceleration device II502 with the low speed end tooth wheel 512 of deceleration device II；The low speed end tooth of deceleration device II Wheel 512 is connected with the intermediate gear 602 of drive mode switching device II；The intermediate gear 602 of drive mode switching device II with The transmission mechanism 606 of fork type drive mode switching device II is connected, the transmission mechanism of fork type drive mode switching device II 606 are connected with the driver 607 of fork type drive mode switching device II；Under the driving of driver, transmission mechanism, which pushes, to be driven The intermediate gear 602 of dynamic mode-changeover device II can be along the gear teeth of the low speed end tooth wheel 512 for the deceleration device II being attached thereto It is mobile, when intermediate gear is mobile to straight drive axle shaft gear II707 under the action of driver and transmission mechanism, finally driven with straight Axle shaft gear II707 is connected, to realize the distributed driving of driving motor II400；When intermediate gear is in driver and transmission When mobile to the input gear of differential mechanism 701 under the action of mechanism, finally it is connected with the input gear of differential mechanism 701, thus real The centralization driving of existing driving motor II400；When intermediate gear is located at the straight input gear for driving axle shaft gear II707 and differential mechanism 701 it is intermediate when, disconnected with the straight input gear 701 for driving axle shaft gear II707 and differential mechanism, driving motor II400 stops at this time Twist-stop square is output to wheel.The straight axle shaft gear II705 for driving axle shaft gear II707 and differential mechanism is directly by semiaxis wheel phase Even.
Referring to Fig. 7, for the structural schematic diagram of another multi-mode transmission system provided in an embodiment of the present invention.The transmission Deceleration device I202 in Fig. 6 and deceleration device II502 is changed to level-one by double planet wheel rows of mixing deceleration mechanism and put down by system compared with Fig. 6 Row shaft gear deceleration mechanism combination primary planet arranges deceleration mechanism, so that driving motor be allow to become parallel axes from coaxial-type Formula, overall structure is more flat, and driving motor is more general.It is driven in the other component parts and Fig. 6 of transmission system shown in Fig. 7 System is identical, and details are not described herein again.
Embodiment five:
The present embodiment additionally provides a kind of multi-mode transmission system control method, and this method is based on above-mentioned multi-mode power train System is realized, as shown in figure 8, it is the flow diagram of this method, as seen from Figure 8, method includes the following steps:
Step S802: judge whether the first driving motor and the second driving motor are in normal operating conditions.
Step S804: it when the first driving motor and the second driving motor are in normal operating conditions, is turned round according to wheel end Square demand and current vehicle speed value select the driving of the first drive mode switching device and the second drive mode switching device combination.
In a kind of wherein possible embodiment, this selects first drive according to wheel end torque demand and current vehicle speed value The step of driving combination of dynamic mode-changeover device and the second drive mode switching device includes:
When wheel end torque demand and current vehicle speed value are in the second high efficient district, but it is not at the first high efficient district and third is efficient Qu Shi controls the second drive mode switching device and is switched to centralized drive mode, which cuts It is changed to power output interrupt mode；
When the wheel end torque demand and the current vehicle speed value are in the first high efficient district, but it is not at the second high efficient district and third When high efficient district, controls the first drive mode switching device and be switched to centralized drive mode, second drive mode switching dress It sets and is switched to power output interrupt mode；
When the wheel end torque demand and the current vehicle speed value are in third high efficient district, but it is not at the first high efficient district and second When high efficient district, controls driving combination and be switched to bi-motor centralization driving in parallel.
Wherein, above-mentioned first high efficient district is when the driving group is combined into the driving of single motor centralization, and the second driving mould When formula switching device is centralized drive mode, the efficient region of the multi-mode transmission system；Above-mentioned second high efficient district is to work as to be somebody's turn to do Driving group is combined into the driving of single motor centralization, and when the first drive mode switching device is centralized drive mode, this is more The efficient region of mode transmission system；Above-mentioned third high efficient district is when the driving group is combined into the driving of bi-motor distribution or bi-motor When centralization driving in parallel, the efficient region of the multi-mode transmission system.
It here, is a kind of performance plot of multi-mode transmission system referring to Fig. 9, which is that a kind of carrying is above-mentioned more Whole road wheel end torque-speed characteristic curve of mode transmission system.Wherein, which includes:
Curve corresponding to second torque threshold and the first speed threshold value is in for the first drive mode switching device and concentrates When formula drive mode, the external characteristic curve at end is taken turns；
Curve corresponding to first torque threshold and the second speed threshold value is in for the second drive mode switching device and concentrates When formula drive mode, the external characteristic curve at end is taken turns；
Curve corresponding to third torque threshold and the second speed threshold value is that the first drive mode switching device and second drive When dynamic mode-changeover device is in centralized drive mode simultaneously, the external characteristic curve at end is taken turns；
Curve corresponding to third torque threshold and the first speed threshold value is that the first drive mode switching device and second drive When dynamic mode-changeover device is in distributed drive mode simultaneously, the external characteristic curve at end is taken turns.
Also, when the first high efficient district is that the second drive mode switching device is in centralized drive mode, system effectiveness compared with High region；
When second high efficient district is that the first drive mode switching device is in centralized drive mode, the higher area of system effectiveness Domain；
Third high efficient district is that the first drive mode switching device and the second drive mode switching device are in centralization simultaneously Drive mode, or simultaneously in distributed drive mode when, the higher region of system effectiveness.
Wherein, when vehicle traction, the calculation formula of system effectiveness is as follows:
System effectiveness=(60 × 1000 ÷ of speed ÷, 2 π ÷ vehicle wheel roll radius × wheel end torque ÷ 9550) two electricity of ÷ Machine wastage in bulk or weight electrical power × 100%.
When vehicle recycles kinetic energy power generation, the calculation formula of system effectiveness is as follows:
The total generated output ÷ of system effectiveness=two motor (60 × 1000 ÷ of speed ÷, 2 π ÷ vehicle wheel roll radius × wheel end Torque ÷ 9550) × 100%.
Wherein, speed unit kmph；Vehicle wheel roll radius unit m；Take turns end Torque unit Nm；Power unit kW.
Further, when the wheel end torque demand is greater than the first torque threshold and less than the second torque threshold, deserve front truck When speed is less than the first speed threshold value, controls the second drive mode switching device and be switched to centralized drive mode, first drive Dynamic mode-changeover device is switched to power output interrupt mode；First torque threshold is to fill when second drive mode switches It is set to centralized drive mode, when which is power output interrupt mode, the external characteristics at the wheel end The most bull wheel end torque of curve；Second torque threshold is, when the first drive mode switching device is centralized drive mode, When the second drive mode switching device is power output interrupt mode, the most bull wheel end torque of the external characteristic curve at the wheel end； The first speed threshold value is, when which is combined into the driving of bi-motor distribution, the max speed of the external characteristic curve at the wheel end Value.
Also, when the wheel end torque demand is less than first torque threshold or the current vehicle speed greater than the first speed threshold When value, controls the first drive mode switching device and be switched to centralized drive mode, which cuts It is changed to power output interrupt mode.
Step S806: when any one driving motor in the first driving motor and the second driving motor is in non-normal working When state, control drive mode switching device corresponding with the driving motor of abnormal operating state is in is switched to power output Interrupt mode, and the corresponding drive mode switching device of driving motor in normal operating conditions is switched to centralized driving Mode.
Step S808: when first driving motor and second driving motor are in abnormal operating state, control The first drive mode switching device and the second drive mode switching device are switched to power output interrupt mode.
In addition, also controlling the first drive mode switching device and second drive mode if wheel end torque demand is 0Nm Switching device is switched to power output interrupt mode.
In another embodiment, above-mentioned multi-mode transmission system control method further includes, if vehicle is arranged to point Cloth drive mode or the mode (such as full-time four-wheel drive) that distributed driving need to be carried out, and speed is then controlled less than the first speed threshold value Drive mode switching device processed is switched to distributed drive mode.
In another embodiment, above-mentioned multi-mode transmission system control method further includes, if the generation of any wheel is beaten It is sliding, and speed then controls drive mode switching device and is switched to distributed drive mode or side electricity less than the first speed threshold value The driving of machine centralization, the driving of other side motor distribution.
In another embodiment, above-mentioned multi-mode transmission system control method further includes, if turning to demand (such as direction Disk corner) the first torque threshold, and speed then controls drive mode switching device and is switched to distribution less than the first speed threshold value Drive mode.
The technical effect of multi-mode transmission system control method provided by the embodiment of the present invention, realization principle and generation Identical with aforementioned multimode formula transmission system embodiment, to briefly describe, multi-mode transmission system control method embodiment part is not It refers to place, can refer to corresponding contents in aforementioned multimode formula transmission system embodiment.
Embodiment six:
The present embodiment introduces the switching method in above-mentioned multi-mode transmission system between each drive mode.
When being switched to distributed drive mode from centralized drive mode, steps are as follows:
(1) driving motor torque is adjusted to 0Nm；
(2) control mode switch mechanism drives intermediate gear to the middle position (input gear and straight drive semiaxis of differential mechanism Middle position between gear)；
(3) motor speed is controlled to change intermediate gear revolving speed, until intermediate gear revolving speed and straight drive axle shaft gear rotational speed difference Less than the first rotational speed difference threshold value.Wherein, intermediate gear revolving speed=motor speed/deceleration device speed ratio is straight to drive axle shaft gear revolving speed The revolving speed of wheel on the semiaxis of=straight drive axle shaft gear place；
(4) control mode switch mechanism driving intermediate gear is engaged with the straight axle shaft gear that drives；
(5) driving motor torque is gradually adjusted to demand torque.
When being switched to centralized drive mode from distributed drive mode, steps are as follows:
(10) driving motor torque is adjusted to 0Nm；
(11) control mode switch mechanism drives intermediate gear to middle position；
(12) motor speed is controlled to change intermediate gear revolving speed, until the input gear of intermediate gear revolving speed and differential mechanism turns Speed difference is less than the second rotational speed difference threshold value.Wherein, intermediate gear revolving speed=motor speed/deceleration device speed ratio, the input of differential mechanism Gear rotational speed is that axle shaft gear revolving speed average value is directly driven in two sides；
(13) control mode switch mechanism driving intermediate gear is engaged with the input gear of differential mechanism；
(14) driving motor torque is gradually adjusted to demand torque.
When being switched to power output interrupt mode from centralized drive mode, steps are as follows:
(21) driving motor torque is adjusted to 0Nm；
(22) control mode switch mechanism drives intermediate gear to middle position.
When being switched to distributed drive mode from breakaway-element drive mode, steps are as follows:
(31) motor speed is controlled to change intermediate gear revolving speed, until intermediate gear revolving speed and straight drive axle shaft gear rotational speed difference Less than the first rotational speed difference threshold value.
(32) control mode switch mechanism driving intermediate gear is engaged with the straight axle shaft gear that drives.
(33) driving motor torque is gradually adjusted to demand torque.
When being switched to centralized drive mode from power output interrupt mode, steps are as follows:
(41) motor speed is controlled to change intermediate gear revolving speed, until the input gear of intermediate gear revolving speed and differential mechanism turns Speed difference is less than the second rotational speed difference threshold value；
(42) control mode switch mechanism driving intermediate gear is engaged with the input gear of differential mechanism；
(43) driving motor torque is gradually adjusted to demand torque.
When being switched to power output interrupt mode from distributed drive mode, steps are as follows:
(51) driving motor torque is adjusted to 0Nm；
(52) control mode switch mechanism drives intermediate gear to middle position.
Multi-mode transmission system and control method provided in an embodiment of the present invention can be applied to drive mode switching device Pure electric automobile will make the continual mileage of pure electric automobile by longer, handling and dynamic property is more preferable and safety and robust Property is more preferable.And user's driving pleasure can also be improved, vehicle energy consumption is reduced, is had to the pressure for alleviating environment, resource important Meaning.
Unless specifically stated otherwise, the opposite step of the component and step that otherwise illustrate in these embodiments, digital table It is not limit the scope of the invention up to formula and numerical value.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
The computer program product of multi-mode transmission system control method is carried out provided by the embodiment of the present invention, including is deposited The computer readable storage medium of the executable non-volatile program code of processor, the instruction that said program code includes are stored up It can be used for executing previous methods method as described in the examples, specific implementation can be found in embodiment of the method, and details are not described herein.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in the executable non-volatile computer-readable storage medium of a processor.Based on this understanding, of the invention Technical solution substantially the part of the part that contributes to existing technology or the technical solution can be with software in other words The form of product embodies, which is stored in a storage medium, including some instructions use so that One computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment institute of the present invention State all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read- Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with Store the medium of program code.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims (10)

1. a kind of drive mode switching device, which is characterized in that be applied to transmission system, the drive mode switching device is external Dynamic output device；The power output device includes straight drive axle shaft gear and differential mechanism；The mode-changeover device includes Intermediate gear and gear mobile unit interconnected；
The gear mobile unit is for moving the intermediate gear, so that the intermediate gear is nibbled with the straight drive axle shaft gear It closes, perhaps engage with the input gear of the differential mechanism or the input tooth with straight the drive axle shaft gear and the differential mechanism Wheel separates, to realize the switching between different driving mode.
2. drive mode switching device according to claim 1, which is characterized in that the mode-changeover device is also circumscribed with Power input device；The power input device includes deceleration device；
The gear mobile unit include: guide ring, outer reset spring, interior reset spring, reset spring pressing plate, electromagnetic coil swash Encourage device exterior loop, electromagnetic coil driver interior loop, armature ring and guiding pull ring；
The guide ring is connected with the intermediate gear；
The both ends of the outer reset spring inner face and the intermediate gear with the low speed end tooth wheel of the deceleration device respectively End face outside be connected；
The reset spring pressing plate is connected with the low speed end tooth wheel of the deceleration device；
The both ends of the interior reset spring are connected with the reset spring pressing plate and the intermediate gear respectively；
The both ends of the guiding pull ring are connected with the intermediate gear and the armature ring respectively；
The electromagnetic coil driver exterior loop and the electromagnetic coil driver interior loop are for generating electromagnetic force so that institute It is mobile to state armature ring, to drive the intermediate gear mobile.
3. drive mode switching device according to claim 1, which is characterized in that the mode-changeover device is also circumscribed with Power input device；The power input device includes deceleration device；
The gear mobile unit includes: driver, lead screw, feed screw nut, shift fork-feed screw nut connects shaft, shift fork is fixed Pin, shift fork, sliding block and sheave；
The driver, the lead screw and the feed screw nut are sequentially connected；
The feed screw nut connects shaft by the shift fork-feed screw nut and is connected with the shift fork；
The shift fork is connected with the sliding block；The shift fork fixed pin is for fixing the shift fork；
In the guide groove of the sheave, the sheave is connected the sliding block with the intermediate gear；The intermediate gear with The deceleration device is connected；
The lead screw rotates under the driving of the driver, and to drive the feed screw nut mobile, the feed screw nut is driven The shift fork is swung, and the shift fork drives the sheave mobile by the sliding block, and the sheave drives the intermediate gear to move It is dynamic.
4. a kind of multi-mode transmission system characterized by comprising driving motor, deceleration device, differential mechanism and claim 1 ~3 described in any item drive mode switching devices；The driving motor, the deceleration device and drive mode switching dress It sets and is sequentially connected；
The driving motor provides power input to the drive mode switching device by the deceleration device；The driving mould Formula switching device is for switching different drive modes with output power；The drive mode includes centralized drive mode, divides Cloth drive mode and power output interrupt mode；
The intermediate gear and institute when the drive mode is centralized drive mode, in the drive mode switching device State the input gear engagement of differential mechanism；
The intermediate gear and institute when the drive mode is distributed drive mode, in the drive mode switching device The straight axle shaft gear that drives is stated to engage；
When the drive mode is power output interrupt mode, the intermediate gear in the drive mode switching device with The input gear of the straight drive axle shaft gear and the differential mechanism separates.
5. multi-mode transmission system according to claim 4, which is characterized in that the deceleration device includes speed end gear With low speed end tooth wheel；The differential mechanism includes input gear, the first axle shaft gear, the second axle shaft gear, planetary gear and planet Gear cross axle；
The speed end gear is connected with the low speed end tooth wheel, the rotor of the driving motor and the speed end gear phase Even, the low speed end tooth wheel is connected with the intermediate gear；
The straight drive axle shaft gear and first axle shaft gear pass through semiaxis and are connected with wheel end；The input gear with it is described Planetary gear cross axle is connected；The planetary gear is connect with the planetary gear cross shaft rotating；
The planetary gear is meshed with first axle shaft gear and second axle shaft gear；First axle shaft gear and Second axle shaft gear is connect with the planetary gear cross shaft rotating respectively.
6. multi-mode transmission system according to claim 4 or 5, which is characterized in that the driving motor includes the first drive Dynamic motor and the second driving motor, the deceleration device include the first deceleration device and the second deceleration device, the drive mode Switching device includes the first drive mode switching device and the second drive mode switching device；
First driving motor, first deceleration device and the first drive mode switching device are sequentially connected；It is described Second driving motor, second deceleration device and the second drive mode switching device are sequentially connected；
The first drive mode switching device and the second drive mode switching device are by switching drive mode to realize Different driving combinations；The driving combination includes: the driving of bi-motor distribution, bi-motor centralization driving in parallel, single motor Centralization driving, combination drive and power output are interrupted；The combination drive is that first driving motor and described second drive Any of dynamic motor driving motor is centralization driving, another is distributed driving.
7. a kind of multi-mode transmission system control method, which is characterized in that the method is based on multi-mode as claimed in claim 6 Transmission system is realized, which comprises
Judge whether first driving motor and second driving motor are in normal operating conditions；
When first driving motor and second driving motor are in normal operating conditions, according to wheel end torque demand The driving of the first drive mode switching device and the second drive mode switching device is selected to combine with current vehicle speed value；
When any one driving motor in first driving motor and second driving motor is in abnormal operating state When, it controls drive mode switching device corresponding with the driving motor in abnormal operating state and is switched to power output Interrupt mode, and the corresponding drive mode switching device of driving motor in normal operating conditions is switched to centralized driving Mode；
When first driving motor and second driving motor are in abnormal operating state, control described first and drive Dynamic mode-changeover device and the second drive mode switching device are switched to power output interrupt mode.
8. multi-mode transmission system control method according to claim 7, which is characterized in that described according to wheel end torque need Summation current vehicle speed value selects the driving group of the first drive mode switching device and the second drive mode switching device The step of conjunction includes:
When wheel end torque demand and current vehicle speed value are in the second high efficient district, but it is not at the first high efficient district and third high efficient district When, it controls the second drive mode switching device and is switched to centralized drive mode, the first drive mode switching device It is switched to power output interrupt mode；First high efficient district be when the driving group be combined into single motor centralization driving, and When the second drive mode switching device is centralized drive mode, the efficient region of the multi-mode transmission system；It is described Second high efficient district is to drive when the driving group is combined into single motor centralization, and the first drive mode switching device is collection When Chinese style drive mode, the efficient region of the multi-mode transmission system；The third high efficient district is when the driving group is combined into When the driving of bi-motor distribution or bi-motor centralization in parallel drive, the efficient region of the multi-mode transmission system；
When the wheel end torque demand and the current vehicle speed value are in the first high efficient district, but it is not at the second high efficient district and third When high efficient district, controls the first drive mode switching device and be switched to centralized drive mode, second drive mode is cut Changing device is switched to power output interrupt mode；
When the wheel end torque demand and the current vehicle speed value are in third high efficient district, but it is not at the first high efficient district and second When high efficient district, controls the driving group and be combined into bi-motor centralization driving in parallel.
9. multi-mode transmission system control method according to claim 8, which is characterized in that the method also includes:
When the wheel end torque demand is greater than the first torque threshold and less than the second torque threshold, the current vehicle speed is less than first When speed threshold value, controls the second drive mode switching device and be switched to centralized drive mode, first drive mode Switching device is switched to power output interrupt mode；
First torque threshold is that, when the second drive mode switching device is centralized drive mode, described first drives When dynamic mode-changeover device is power output interrupt mode, the most bull wheel end torque of the external characteristic curve at the wheel end；
Second torque threshold is that, when the first drive mode switching device is centralized drive mode, described second drives When dynamic mode-changeover device is power output interrupt mode, the most bull wheel end torque of the external characteristic curve at the wheel end；
The first speed threshold value is, when the driving group is combined into the driving of bi-motor distribution, the external characteristic curve at the wheel end The max speed value.
10. multi-mode transmission system control method according to claim 9, which is characterized in that the method also includes:
When the wheel end torque demand is less than first torque threshold or the current vehicle speed greater than the first speed threshold value When, it controls the first drive mode switching device and is switched to centralized drive mode, the second drive mode switching device It is switched to power output interrupt mode.
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