CN108859702A - A kind of electric vehicle and its drive system - Google Patents
A kind of electric vehicle and its drive system Download PDFInfo
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- CN108859702A CN108859702A CN201810290622.0A CN201810290622A CN108859702A CN 108859702 A CN108859702 A CN 108859702A CN 201810290622 A CN201810290622 A CN 201810290622A CN 108859702 A CN108859702 A CN 108859702A
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- gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
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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
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a kind of drive systems for electric vehicle, including to provide the electric machine assembly of power, the electric machine assembly includes motor stator and rotor, further includes the speed changer being connected with the electric machine assembly to realize vehicle speed variation, and the output shaft being connected with the speed changer；The speed changer realizes shift and speed change by gear shifting actuating mechanism；The motor stator is set in the housing with the speed changer, and the input shaft of the armature spindle of the rotor and the speed changer is same axis.The invention also discloses a kind of electric vehicles including above-mentioned drive system.Above-mentioned drive system, structure is simple, reduces the requirement to motor performance and the cost of power assembly, while improving the reliability of vehicle performance and system；Meanwhile arrangement space is reduced, cost brought by extra shell is reduced and improves the reliability of vehicle.
Description
Technical field
The present invention relates to Vehicle Engineering technical field, in particular to a kind of electric vehicle and its drive system.
Background technique
Currently, being used in electric automobiles list gear gearbox relatively broad.Single gear gearbox is simple with structure, is not required to
The advantages that wanting controller, but its (torque, revolving speed) higher to the performance requirement of motor.At the same time, pure electric vehicle power in the market
The motor and speed changer of system are independent two components mostly, and independent power assembly has structure simple, easy to repair etc.
Advantage, but it is more demanding to spatial volume, while being also easy to produce quality problems (because motor and speed changer coaxiality error are led
The connection spline inordinate wear of cause).
Summary of the invention
The object of the present invention is to provide a kind of electric vehicle and its drive system, structure is simple, reduces to motor performance
Requirement and power assembly cost, while improving the reliability of vehicle performance and system；Meanwhile arrangement space is reduced,
It reduces cost brought by extra shell and improves the reliability of vehicle.
To achieve the above object, the present invention provides a kind of drive system for electric vehicle, including to provide power
Electric machine assembly, the electric machine assembly includes motor stator and rotor, further includes being connected with the electric machine assembly to realize
The speed changer of vehicle speed variation, and the output shaft being connected with the speed changer；The speed changer is realized by gear shifting actuating mechanism
Shift and speed change；The motor stator is set in the housing with the speed changer, and the armature spindle of the rotor with it is described
The input shaft of speed changer is same axis.
Preferably, the speed changer is specially two speed transmission, including mutually engageable one grade of driving gear and one grade
Driven gear further includes mutually engageable two grades of driving gears and two grades of driven gears；And one grade of driving gear and institute
It states two grades of driving gears to be connected with the armature spindle, the input shaft as the speed changer.
Preferably, the gear shifting actuating mechanism is disposed in the housing, and the gear shifting actuating mechanism includes：
It can be along the electromagnetic switch of the axial stretching of the armature spindle；
It is connected with the electromagnetic switch, the reset spring to drive the electromagnetic switch to reset；
The slide piece shift fork that is connected to the electromagnetic switch, can change along the axial position of the armature spindle；
It is connected to the slide piece shift fork, to realize one grade of driving gear and first speed driven gear engagement or institute
State the synchronizer of two grades of driving gears and two grades of driven gears engagement.
Preferably, further include the jackshaft being connected with the first speed driven gear and two grades of driven gears, it is described in
Between axis be additionally provided with the main tooth of differential mechanism, the main tooth of differential mechanism is meshed with differential mechanism, and the differential mechanism connects the output shaft.
Preferably, further include speed probe to monitor the output shaft revolving speed；The speed probe connection
VCU, the VCU connection IPU；
The VCU includes：
Judge whether the shift judgment module for needing to shift gears to the accelerator pedal aperture and current vehicle speed according to vehicle；
It is connected with the shift judgment module, to realize when the shift judgment module is judged to need to shift gears to described
The unloading sending module of IPU transmission unloading command；
It is connected with the gear shifting actuating mechanism, the gear switch module to realize gear shift and speed change；
The IPU includes：
To receive the unloading command receiving module of unloading command；
It is connected with the unloading command receiving module, the Unload module to realize the electric machine assembly unloading；
It is connected with the gear switch module, to be sent after Unload module unloading to the gear switch module
The gear switch signal transmitting module of gear switch signal.
Preferably,
The gear switch module includes：
To receive the gear switch signal receiving unit of gear switch signal；
After receiving gear switch signal, to judge whether the electric machine assembly is in the unloaded shape of light condition
State judging unit；
To control the neutral gear that the gear shifting actuating mechanism switches to neutral gear when the electric machine assembly is in light condition
Switch unit；
The speed-regulating signal of speed-regulating signal is sent to the IPU when the gear shifting actuating mechanism switches to neutral position state
Transmission unit；
To switch the shift switch unit of gear after output shaft speed regulation；
The IPU further includes：
To the speed adjusting module for receiving speed-regulating signal and being adjusted the speed to the electric machine assembly.
Preferably, the shift switch unit further includes：
To judge whether to meet shift by the revolving speed of the output shaft after sending speed-regulating signal to the IPU
The shift threshold decision subelement of threshold value；
Shift to execute shift when the revolving speed of the output shaft meets shift threshold value executes subelement.
Preferably,
The VCU further includes：
It is connected with the gear switch module, to judge that whether the gear of target gear engaged nibbles after shift
Close judgment module；
It is connected, with the judgment module that engages to send driving letter to the IPU after gear engagement of target gear
Number driving signal sending module；
The IPU further includes：
To receive driving signal and control the control that the electric machine assembly run according to the target torque of driving signal
Molding block.
Preferably, the shift judgment module is connected with the driving signal sending module, when the shift judgment module
When judging not needing shift, driving signal is sent to the IPU by the driving signal sending module.
The present invention provides a kind of electric vehicle, including drive system described in any of the above embodiments.
Relative to above-mentioned background technique, the drive system for electric vehicle of offer of the invention, motor stator and become
Fast device is set in the housing, and the input shaft of the armature spindle of rotor and speed changer is same axis；So set, driving system
The structure of system is simple, reduces the requirement to motor performance and the cost of power assembly, while improving vehicle performance and system
Reliability；Meanwhile arrangement space is reduced, cost brought by extra shell is reduced and improves the reliability of vehicle.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is electric vehicle and its structural schematic diagram of drive system provided by the embodiment of the present invention；
Fig. 2 is the structural block diagram of VCU in Fig. 1；
Fig. 3 is the structural block diagram of IPU in Fig. 1；
Fig. 4 is the structural block diagram of Fig. 2 middle gear switching module；
Fig. 5 is the structural block diagram of shift switch unit in Fig. 4；
Fig. 6 is the gear shift operation flow chart of the drive system in Fig. 1.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make those skilled in the art more fully understand the present invention program, with reference to the accompanying drawing and it is embodied
The present invention is described in further detail for mode.
Fig. 1 to Fig. 6 is please referred to, Fig. 1 shows for the structure of electric vehicle provided by the embodiment of the present invention and its drive system
It is intended to；Fig. 2 is the structural block diagram of VCU in Fig. 1；Fig. 3 is the structural block diagram of IPU in Fig. 1；Fig. 4 is Fig. 2 middle gear switching module
Structural block diagram；Fig. 5 is the structural block diagram of shift switch unit in Fig. 4；Fig. 6 is the gear shift operation process of the drive system in Fig. 1
Figure.
A kind of drive system for electric vehicle provided by the invention, including electric machine assembly and speed changer, speed changer are logical
It crosses gear shifting actuating mechanism 19 and realizes shift and speed change；Wherein, electric machine assembly includes motor stator 2 and rotor 3, rotor
3 rotate around motor stator 2, and then provide power to vehicle, and electric machine assembly can be permanent magnet synchronous motor.
The armature spindle 16 of rotor 3 and the input shaft of speed changer are same axis, as shown in Figure of description 1；Motor
Rotation torque is transferred directly to speed changer by armature spindle 16 by rotor 3, by realizing car speed after the shift of speed changer
Change, and speed changer connects output shaft 11；That is, speed changer adjusts armature spindle 16 after the shift of gear shifting actuating mechanism 19
Rotation torque, and exported by output shaft 11, the final variation for realizing speed.Motor stator 2 and speed changer are set to shell
Interior, motor stator 2 and speed changer share a shell, and the armature spindle 16 and transmission input shaft of rotor 3 are same axis, turn
Sub- axis 16 is passed through shared shell and is sealed using oil sealing.
So set, the driving system structure of vehicle is simple, reduce requirement to motor performance and power assembly at
This, while improving the reliability of vehicle performance and system；Meanwhile arrangement space is reduced, it reduces extra shell and is brought
Cost and improve the reliability of vehicle.
For speed changer, the application is two speed transmission, mainly includes the tooth of two groups of engagements as shown in Figure of description 1
Wheel, respectively mutually engageable one grade of driving gear 6 and first speed driven gear 8 and mutually engageable two grades of driving tooths
Wheel 15 and two grades of driven gears 9；And one grade of driving gear 6 and two grades of driving gears 15 are connected with armature spindle 16, as speed change
The input shaft of device namely the armature spindle 16 of rotor 3；When one grade of driving gear 6 and first speed driven gear 8 are intermeshed,
Vehicle is advanced with certain speed, after being shifted gears by gear shifting actuating mechanism 19, two grades of driving gears 15 and two grades of 9 phases of driven gear
Mutually engagement, vehicle can change the power of vehicle at this time；Two speed transmission used by the application can be promoted vehicle performance and
Reduce power assembly cost.
It for the specific set-up mode of gear shifting actuating mechanism 19, is set in the housing, and gear shifting actuating mechanism 19 mainly wraps
Electromagnetic switch 18, reset spring 5, slide piece shift fork 17 and synchronizer 7 are included, as shown in Figure of description 1；Electromagnetic switch 18 being capable of edge
The axial stretching of armature spindle 16, reset spring 5 connect electromagnetic switch 18, electromagnetic switch 18 can be driven to reset, slide piece shift fork 17
It is connected to electromagnetic switch 18, and under the action of electromagnetic switch 18, slide piece shift fork 17 can become along the axial position of armature spindle 16
Change；Synchronizer 7 is connected with slide piece shift fork 17, and the two moves synchronously, under the action of 17 synchronizer 7 of slide piece shift fork, one grade of active
Gear 6 and first speed driven gear 8 may be implemented to be intermeshed, and two grades of driving gears 15 and two grades of driven gears 9 can also be with
Realize intermeshing.
Wherein, electromagnetic switch 18 is normally open, and synchronizer 7 and one grade of driving gear 6 are normally off, namely general
In the case of speed changer be one grade of state, one grade of driving gear 6 and first speed driven gear 8 engage.
First speed driven gear 8 and two grades of driven gears 9 are also connected with jackshaft 10, and the main tooth of 10 connected with differential of jackshaft
14, namely no matter one grade of driving gear 6 and the engagement of first speed driven gear 8 or two grades of driving gears 15 and two grades of driven gears 9
Engagement, jackshaft 10 can rotate, and will drive the main tooth 14 of differential mechanism and rotate, the main tooth 14 of differential mechanism and differential mechanism 12
It is meshed, differential mechanism 12 connects output shaft 11, realizes the output of power.
In order to control shift process, using the revolving speed of 13 real-time monitoring output shaft 11 of speed probe, VCU20 can basis
Operator demand and tach signal control the working condition of two grades of pure electric vehicles, as one grade, two grades, neutral gear or gearshift condition.Turn
Fast sensor 13 can be Hall sensor.IPU1 is connected with electric machine assembly, to realize the loading and unloading to electric machine assembly,
Namely adjust the revolving speed and speed of armature spindle 16.
Specifically, VCU20 mainly includes shift judgment module 201, unloading sending module 202, gear switch module
203, judgment module 204 and driving signal sending module 205 are engaged, as shown in Figure of description 2；Shift judgment module 201
Judge whether to need to shift gears according to the accelerator pedal aperture and current vehicle speed of current vehicle；That is, in normally travel, speed changer
For one grade of state, one grade of driving gear 6 and first speed driven gear 8 are engaged.If vehicle needs to accelerate, driver tramples acceleration and steps on
Plate, so that accelerator pedal aperture becomes larger, and when current vehicle speed can be become faster by shift, then judgment module 201 of shifting gears can be with
Judge that vehicle needs to shift gears at this time.
Shift judgment module 201 is connected with unloading sending module 202, when shift judgment module 201 may determine that at this time
When vehicle needs to shift gears, unloading sending module 202 sends unloading command to IPU1；Namely before shift, need to pass through IPU1
Electric machine assembly is unloaded, the revolving speed of speed and armature spindle 16 is reduced.Gear switch module 203 and gear shifting actuating mechanism 19
It is connected, shifts gears to control gear shifting actuating mechanism 19, realize the change of speed.
IPU1 mainly include unloading command receiving module 110, Unload module 111, gear switch signal transmitting module 112,
Speed adjusting module 113 and control module 114, as shown in Figure of description 3；When shift judgment module 201 may determine that vehicle at this time
When needing to shift gears, unloading sending module 202 sends unloading command, unloading command to the unloading command receiving module 110 of IPU1
Receiving module 110 can receive unloading command, and after unloading command receiving module 110 receives unloading command, touching
Unload module 111 is sent out, so that Unload module unloads electric machine assembly, namely disconnects the electric current of electric machine assembly, is turned with reducing
The revolving speed and speed of sub- axis 16.After Unload module 111 unloads, gear of the gear switch signal transmitting module 112 to VCU20
Switching module 203 sends gear switch signal, and after gear switch module 203 receives gear switch signal, control shift is executed
Mechanism 19 shifts gears, and realizes the change of speed.
As can be seen that the process of shift is mainly：Need to shift gears using the judgement of shift judgment module 201 of VCU20,
The unloading sending module 202 of VCU20 sends unloading command, the Unload module of IPU1 to the unloading command receiving module 110 of IPU1
111 pairs of electric machine assemblies are unloaded, the gear switch module 203 of VCU20 realizes the transformation of gear.
Wherein it is possible to the gear switch module 203 for VCU20 is refined the step for realizing the transformation of gear,
I.e. gear switch module 203 can also include gear switch signal receiving unit 2031, light condition judging unit 2032, neutral gear
Switch unit 2033, speed-regulating signal transmission unit 2034 and shift switch unit 2035, as shown in Figure of description 4.
It is first after gear switch module 203 receives the gear switch signal of the transmission of gear switch signal transmitting module 112
Gear switch signal is first acquired by gear switch signal receiving unit 2031, the then judgement of light condition judging unit 2032 is worked as
Whether front motor component is in light condition, this judgment step can by judge armature spindle 16 revolving speed and speed into
Row；Namely when electric machine assembly is in light condition, then the revolving speed of armature spindle 16 and speed should change significantly, Ke Yitong
It crosses the variation and determines whether current motor component is in light condition；When electric machine assembly is in light condition, neutral gear switching is single
Member 2033 controls gear shifting actuating mechanism 19 and switches to neutral gear, namely vehicle is unpowered at this time, and speed reduces naturally.When shift executes
When mechanism 19 switches to neutral position state, speed-regulating signal transmission unit 2034 sends speed-regulating signal to IPU1, and IPU1 receives speed regulation
After signal, speed adjusting module 113 adjusts the speed electric machine assembly, is also adjusted to the revolving speed of armature spindle 16 and speed respectively
Appropriate speed so that switch unit 2035 of shifting gears switches over gear, namely will be in neutral gear using shift switch unit 2035
Status adjustment is to second gear state, at this time by two grades of 9 output powers of driven gear.
The above process may be summarized to be：Gear switch signal receiving unit 2031 acquires gear switch signal, unloaded shape
State judging unit 2032 judges whether current motor component is in light condition, speed-regulating signal transmission unit 2034 is sent to IPU1
Speed-regulating signal adjusts the speed electric machine assembly using speed adjusting module 113, realizes shift using shift switch unit 2035.
It further include that shift threshold decision subelement 20351 and shift execute subelement for shift switch unit 2035
20352, as shown in Figure of description 5.
After sending speed-regulating signal to IPU1, shift threshold decision subelement 20351 is sentenced by the revolving speed of output shaft 11
It is disconnected whether to meet shift threshold value；Namely before shift switch unit 2035 switches over gear, need further to judge output
The revolving speed of axis 11 judges whether to meet shift threshold value, if meets the condition that second gear is switched to by neutral gear；When turning for output shaft 11
When speed meets shift threshold value, subelement 20352 is executed using shift and executes shift.That is, working as 113 pairs of electricity of speed adjusting module
After thermomechanical components are adjusted the speed, it should also further ensure that whether the revolving speed of output shaft 11 meets shift condition, wherein threshold value of shifting gears
The range of speeds needed for referring to shift, can be decided according to the actual requirements.
In addition to this, the engagement judgment module 204 of VCU20 is connected with gear switch module 203, after shift, nibbles
Closing judgment module 204 can judge whether the gear of target gear engages, and engage judgment module 204 and driving signal transmission mould
Block 205 connects, and sends driving signal to IPU1 after the gear engagement of target gear, after IPU1 receives driving signal, utilizes
The control module 114 of IPU1 is run according to the target torque control electric machine assembly of driving signal；That is, after shifting gears successfully,
The driving signal sending module 205 of VCU20 sends driving signal to IPU1, which refers to that trampling acceleration by driver steps on
The control module 114 of the signal of the sendings such as plate, IPU1 can control electric machine assembly operation, electricity according to the target torque of driving signal
Thermomechanical components may be implemented to operate normally.
Shift judgment module 201 is connected with driving signal sending module 205, when shift judgment module 201 is judged to be not required to
When shifting gears, by driving signal sending module 205 to IPU1 send driving signal, if namely shift judgment module 201 sentence
Disconnected vehicle out is without when shifting gears, then sending driving signal to driving signal sending module 205, and vehicle is dynamic without above-mentioned shift at this time
Make, just with the 114 direct-driving motor assembly operating of control module of IPU1.
Figure of description 6 shows shift process：Wherein,
In step S1 and step S2, after VCU obtains accelerator pedal and current vehicle speed, mesh is determined according to accelerator pedal and speed
Gear and shifting commands are marked, and are sent in the CAN bus of vehicle；As described above, according to accelerator pedal and current vehicle speed,
VCU, which determines the need for shift, (since only there are two gears by the application, also just can determine mesh when judging to need to shift gears
Mark gear), when needing to shift gears, shifting commands are sent to CAN bus.
In step S3, VCU sends unloading command to IPU, and IPU control driving motor is unloaded namely above-mentioned " unloading hair
Module 202 is sent to send unloading command to the unloading command receiving module 110 of IPU1, unloading command receiving module 110 can receive
To unloading command, and after unloading command receiving module 110 receives unloading command, Unload module 111 is triggered, so that unloading
Carry module to unload electric machine assembly, namely disconnect the electric current of electric machine assembly " process.
In step S4, VCU judges whether motor reaches light condition；Namely judged using light condition judging unit 2032
Whether current motor component is in light condition.
In step S5, control electromagnetic switch switches to attracted position 1, gear switch to neutral gear；When light condition judges list
When member 2032 judges that current motor component is in light condition, then electromagnetic switch is switched to neutral gear position by VCU, under the position
Synchronizer 7 is not connected to one grade of driving gear 6 and two grades of driving gears 15, also as neutral position state.Namely above-mentioned neutral gear is cut
It changes the control gear shifting actuating mechanism 19 of unit 2033 and switches to neutral gear, namely vehicle is unpowered at this time, speed reduces naturally
In step S6, VCU judges whether in neutral gear position；Light condition judging unit 2032 judges that current motor component is
No to be in light condition, this judgment step can be carried out by the revolving speed and speed for judging armature spindle 16.
In step S7, for VCU to the sending mode switching mark position IPU and rotating speed of target, IPU controls driving motor speed regulation, VCU
Acquire output shaft revolving speed；When gear shifting actuating mechanism 19 switches to neutral position state, speed-regulating signal transmission unit 2034 is sent out to IPU1
After sending speed-regulating signal, IPU1 to receive speed-regulating signal, speed adjusting module 113 adjusts the speed electric machine assembly, also i.e. by armature spindle
16 revolving speed and speed is adjusted to appropriate speed respectively, and to shift gears, switch unit 2035 switches over gear.
In step S8, VCU judges whether to be less than or equal to given threshold；Given threshold is shift threshold value described above；
Before shift switch unit 2035 switches over gear, need further to judge that the revolving speed of output shaft 11 judges whether to meet to change
Keep off threshold value；After speed adjusting module 113 adjusts the speed electric machine assembly, to further ensure that whether the revolving speed of output shaft 11 meets
Shift condition, is judged using VCU.
In step S9, when the revolving speed of output shaft 11 meet shift threshold value when, VCU to IPU sending mode switching mark position, and
Control electromagnetic switch switches to drive range, gear switch to second gear；Namely when the revolving speed of output shaft 11 meets shift threshold value,
Subelement 20352, which is executed, using shift executes shift.
In step S10, VCU judges whether target shifting gear engages；After shift, 204 energy of judgment module is engaged
Enough judge whether the gear of target gear engages, and engage judgment module 204 and connect with driving signal sending module 205, works as mesh
Driving signal is sent to IPU1 after the gear engagement of mark gear, after IPU1 receives driving signal, utilizes the control module of IPU1
114 send target torque, control to IPU according to the target torque control electric machine assembly operation of driving signal namely step S11, VCU
The target of driving motor processed exports.
In addition to this, in step S2, when judgment module 201 of shifting gears judges that vehicle is not necessarily to shift gears, then to driving signal
Sending module 205 sends driving signal, and vehicle is not necessarily to above-mentioned gear shifting action at this time, straight just with the control module 114 of IPU1
Driving motor assembly operating is connect, namely directly executes step S11.
In simple terms, shift process is：Judge to determine through VCU to shift gears and give an order and shift gears to IPU unloading cooperation, then
Control electromagnetic switch is at neutral gear position, and synchronizer is pushed middle part in company with electromagnetic switch by selector fork, at this time synchronizer
In neutral gear position；VCU gives an order again to carry out rotational speed regulation to IPU and reaches shift-variable condition, then controls electromagnetic switch and make at its
In drive range state, speed changer is in two grades of states at this time.
A kind of electric vehicle with drive system provided by the present invention, including driven described in above-mentioned specific embodiment
Dynamic system；The other parts of electric vehicle are referred to the prior art, not reinflated herein.
It should be noted that in the present specification, such as first and second etc relational terms are used merely to one
Entity is distinguished with other several entities, and without necessarily requiring or implying between these entities, there are any this actual
Relationship or sequence.
Electric vehicle provided by the present invention and its drive system are discussed in detail above.It is used herein specifically a
Principle and implementation of the present invention are described for example, and it is of the invention that the above embodiments are only used to help understand
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from the principle of the invention
Under the premise of, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the claims in the present invention
Protection scope in.
Claims (10)
1. a kind of drive system for electric vehicle, including to provide the electric machine assembly of power, the electric machine assembly includes
Motor stator (2) and rotor (3), which is characterized in that further include being connected with the electric machine assembly to realize vehicle speed variation
Speed changer, and the output shaft (11) being connected with the speed changer；The speed changer is realized by gear shifting actuating mechanism (19) and is changed
Keep off simultaneously speed change；The motor stator (2) is set in the housing with the speed changer, and the armature spindle of the rotor (3)
It (16) is same axis with the input shaft of the speed changer.
2. drive system according to claim 1, which is characterized in that the speed changer is specially two speed transmission, including
Mutually engageable one grade of driving gear (6) and first speed driven gear (8) further include mutually engageable two grades of driving gears
(15) and two grades of driven gears (9)；And one grade of driving gear (6) and two grades of driving gears (15) with the rotor
Axis (16) is connected, the input shaft as the speed changer.
3. drive system according to claim 2, which is characterized in that the gear shifting actuating mechanism (19) is set to the shell
Interior, the gear shifting actuating mechanism (19) includes：
It can be along the electromagnetic switch (18) of the axial stretching of the armature spindle (16)；
It is connected with the electromagnetic switch (18), the reset spring (5) to drive the electromagnetic switch (18) to reset；
The slide piece shift fork (17) that is connected to the electromagnetic switch (18), can change along the axial position of the armature spindle (16)；
It is connected to the slide piece shift fork (17), to realize that one grade of driving gear (6) and the first speed driven gear (8) are nibbled
The synchronizer (7) of conjunction or the engagement of two grades of driving gears (15) and two grades of driven gears (9).
4. drive system according to claim 3, which is characterized in that further include and the first speed driven gear (8) and institute
The connected jackshaft (10) of two grades of driven gears (9) is stated, the jackshaft (10) is additionally provided with the main tooth of differential mechanism (14), the differential
The main tooth of device (14) is meshed with differential mechanism (12), and the differential mechanism (12) connects the output shaft (11).
5. drive system described in any one according to claim 1~4, which is characterized in that further include described defeated to monitor
The speed probe (13) of shaft (11) revolving speed；The speed probe (13) connects VCU (20), and the VCU (20) connects IPU
(1)；
The VCU (20) includes：
Judge whether the shift judgment module for needing to shift gears to the accelerator pedal aperture and current vehicle speed according to vehicle
(201)；
It is connected with the shift judgment module (201), to realize when the shift judgment module (201) is judged to need to shift gears
The unloading sending module (202) of unloading command is sent to the IPU (1)；
It is connected with the gear shifting actuating mechanism (19), the gear switch module (203) to realize gear shift and speed change；
The IPU (1) includes：
To receive the unloading command receiving module (110) of unloading command；
It is connected with the unloading command receiving module (110), the Unload module (111) to realize the electric machine assembly unloading；
Be connected with the gear switch module (203), to after the Unload module (111) unloading to the gear switch mould
The gear switch signal transmitting module (112) of block (203) transmission gear switch signal.
6. drive system according to claim 5, which is characterized in that
The gear switch module (203) includes：
To receive the gear switch signal receiving unit (2031) of gear switch signal；
Sentence after receiving gear switch signal, to judge whether the electric machine assembly is in the light condition of light condition
Disconnected unit (2032)；
To control the neutral gear that the gear shifting actuating mechanism (19) switches to neutral gear when the electric machine assembly is in light condition
Switch unit (2033)；
The speed regulation of speed-regulating signal is sent to the IPU (1) when the gear shifting actuating mechanism (19) switches to neutral position state
Signal transmitting unit (2034)；
To switch the shift switch unit (2035) of gear after the output shaft (11) speed regulation；
The IPU (1) further includes：
To the speed adjusting module (113) for receiving speed-regulating signal and being adjusted the speed to the electric machine assembly.
7. drive system according to claim 6, which is characterized in that the shift switch unit (2035) further includes：
To judge whether to meet by the revolving speed of the output shaft (11) and change after sending speed-regulating signal to the IPU (1)
Keep off the shift threshold decision subelement (20351) of threshold value；
Shift to execute shift when the revolving speed of the output shaft (11) meets shift threshold value executes subelement (20352).
8. drive system according to claim 7, which is characterized in that
The VCU (20) further includes：
It is connected with the gear switch module (203), to judge what whether the gear of target gear engaged after shift
It engages judgment module (204)；
It is connected, with described engage judgment module (204) to send drive to the IPU (1) after the gear engagement of target gear
The driving signal sending module (205) of dynamic signal；
The IPU (1) further includes：
To receive driving signal and control the control mould that the electric machine assembly run according to the target torque of driving signal
Block (114).
9. drive system according to claim 8, which is characterized in that the shift judgment module (201) and the driving
Signal transmitting module (205) is connected, and when the shift judgment module (201) judges not needing shift, passes through the driving
Signal transmitting module (205) sends driving signal to the IPU (1).
10. a kind of electric vehicle, which is characterized in that including drive system as described in any one of claim 1 to 9.
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| CN201810290622.0A CN108859702A (en) | 2018-03-30 | 2018-03-30 | A kind of electric vehicle and its drive system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810290622.0A CN108859702A (en) | 2018-03-30 | 2018-03-30 | A kind of electric vehicle and its drive system |
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Application publication date: 20181123 |