CN109854693A - Stepless speed variator system suitable for electric car - Google Patents
Stepless speed variator system suitable for electric car Download PDFInfo
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- CN109854693A CN109854693A CN201811646010.7A CN201811646010A CN109854693A CN 109854693 A CN109854693 A CN 109854693A CN 201811646010 A CN201811646010 A CN 201811646010A CN 109854693 A CN109854693 A CN 109854693A
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- oil
- pressure
- stepless speed
- electric car
- speed variator
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- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 78
- 239000010720 hydraulic oil Substances 0.000 claims description 20
- 238000005461 lubrication Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- 239000010687 lubricating oil Substances 0.000 claims description 8
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 230000009194 climbing Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
The invention discloses a kind of stepless speed variator systems suitable for electric car, including stepless speed changing mechanism and hydraulic executing system；Stepless speed changing mechanism includes driving pulley, driven pulley and the transmission belt being set on driving pulley and driven pulley；Hydraulic executing system includes oil pump, pressure oil circuit and working connection；Working connection is connect with pressure oil circuit and oil pump, and the pressure-regulating valve for adjusting oil pressure is equipped in pressure oil circuit.The present invention is suitable for the stepless speed variator system of electric car, by the way that hydraulic executing system is arranged, realize that the gear ratio of stepless speed changing mechanism is adjusted, it can make entire stepless speed variator system that cost that is energy-efficient and reducing vehicle application may be implemented, vehicle low-speed dynamic and grade climbing performance not only can be improved, while the energy utilization rate of vehicle can be improved.
Description
Technical field
The invention belongs to transmission technology fields, specifically, the present invention relates to a kind of stepless changes suitable for electric car
Speed system.
Background technique
Typical transmission system of electric automobile is made of constant-speed ratio reduction gearing, and motor power is directly passed by reduction gearing
It is delivered to wheel, motor power can not realize the adjusting of torque and revolving speed to adapt to vehicle driving, in order to meet by retarder
Vehicle low-speed big demand and high speed travel demand, and electric car is expired by improving Motor torque and revolving speed at present
The demand of sufficient vehicle.
Although current power drive system can substantially meet vehicle use demand, current system limitations compare
Greatly, as compared with conventional truck, dynamic property and max. speed are obviously relatively low, and pure electric power consumption height, at the same integral vehicle cost compared with
Height, and since the high revolving speed operational shock noise problem of motor is prominent.It is a series of in order to solve single reduction gear system bring
Deficiency, the patent document of Publication No. CN104534037A disclose a kind of two-speed automatic transmission that electro-motive vehicle uses,
It includes input shaft, jackshaft, the first cylindrical gear pair, the second cylindrical gear pair, third cylindrical gear pair, the first torque transfer
Device, the second torque transmitter, planet gear transmission device and differential assembly.The program increases compared to single reduction gear
Add a gear, effectively increases the dynamic property and power consumption performance of former power drive system；But since only there are two gear, nothings
Method plays electric efficiency and torque to greatest extent, so that the dynamic property of pure electric vehicle and power consumption performance can not be sent out
Maximum horizontal is waved, simultaneously because there are a wide range of mutation of motor speed during two gear switches, vehicle punching can be generated
Sense is hit, the driver comfort of vehicle is influenced.Therefore, it is necessary to a kind of function is more perfect, power consumption is lower, the higher electricity of driver comfort
Electrical automobile stepless speed variator system.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides a kind of fit
In the stepless speed variator system of electric car, it is therefore an objective to improve the energy utilization rate of vehicle.
To achieve the goals above, the technical scheme adopted by the invention is as follows: suitable for the stepless speed variator system of electric car, packet
It includes:
Stepless speed changing mechanism comprising driving pulley, driven pulley and be set on driving pulley and driven pulley
Transmission belt；And
Hydraulic executing system comprising oil pump, for guiding hydraulic oil to driving pulley and being used to adjust driving pulley
Pulley groove groove width pressure oil circuit and for by hydraulic oil guide to driven pulley and adjust driven pulley pulley groove groove width
Working connection；Working connection is connect with pressure oil circuit and oil pump, and the pressure-regulating valve for adjusting oil pressure is equipped in pressure oil circuit.
The pressure-regulating valve is two-position three way magnetic valve.
The first oil pressure sensor for detecting oil pressure is equipped in the pressure oil circuit.
The second oil pressure sensor for detecting oil pressure is equipped in the working connection.
The hydraulic executing system further includes the lubrication branch connecting with the working connection and connect and liquid with lubrication branch
Pressure oil is guided to the cooling and lubricating oil circuit that at specified parts specified parts are carried out with cooling and lubricating.
Restriction is equipped in the lubrication branch.
The present invention is suitable for the stepless speed variator system of electric car, by the way that hydraulic executing system is arranged, realizes stepless speed changer
The gear ratio of structure is adjusted, can make entire stepless speed variator system may be implemented it is energy-efficient and reduce vehicle application at
This, not only can be improved vehicle low-speed dynamic and grade climbing performance, while can improve the energy utilization rate of vehicle, and make electricity
Machine does not need work in high speed area, can substantially improve power drive system because the high rotary speed working bring vibration of motor is made an uproar
Mail topic, while the cost that vehicle substantially reduces driving motor and electric-control system to the high-revolving demand of motor can be reduced.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is the structural schematic diagram for the stepless speed variator system that the present invention is suitable for electric car；
In the figure, it is marked as 1, driving motor；2, driving pulley；3, transmission belt；4, driven pulley；5, deceleration driving gear；
6, reduction driven gear；7, oil pump；8, restriction；9, working connection；10, cooling and lubricating oil circuit；11, the second oil pressure sensor；12,
Pressure-regulating valve；13, pressure oil circuit；14, the first oil pressure sensor；15, branch is lubricated.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and facilitate its implementation.
As shown in Figure 1, the present invention provides a kind of stepless speed variator system suitable for electric car, including stepless speed changing mechanism
With the hydraulic executing system of the gear ratio for adjusting stepless speed changing mechanism.Stepless speed changing mechanism includes driving pulley 2, driven belt
Wheel 4 and the transmission belt 3 for being set on driving pulley 2 and driven pulley 4 and be annular；Hydraulic executing system includes oil pump 7, uses
In by hydraulic oil guide to driving pulley 2 and be used to adjust driving pulley 2 pulley groove groove width pressure oil circuit 13 and be used for by
Hydraulic oil guides the working connection 9 of the pulley groove groove width to driven pulley 4 and adjusting driven pulley 4；Working connection 9 and pressure oil circuit 13
It is connected with oil pump 7, the pressure-regulating valve 12 for adjusting oil pressure is equipped in pressure oil circuit 13.
As shown in Figure 1, stepless speed changing mechanism is variable v-belt drive, one end of transmission belt 3 is wound on driving pulley 2
On, on driven pulley 4, the driving pulley 2 of stepless speed changing mechanism is connect the other end of transmission belt 3 with driving motor 1, is driven
Movable belt pulley 2 receives the power generated by driving motor 1, and driven pulley 4 is connect by deceleration mechanism with differential mechanism and the speed reducer
Structure play the role of slow down increase square, deceleration mechanism and be one-stage gear mechanism, realize the transmitting of power, the deceleration mechanism include with from
Movable belt pulley 4 is the deceleration driving gear 5 of coaxial arrangement and is fixedly installed on the shell of differential mechanism and nibbles with deceleration driving gear 5
The reduction driven gear 6 of conjunction.For driving motor 1 in driving vehicle travel process, the power that driving motor 1 generates will be by stepless
Gear, deceleration mechanism and differential mechanism are output to wheel, can realize stepless speed regulation by stepless transmission, realize low vehicle
It is low by making stepless transmission work be output to wheel raising vehicle after large transmission ratio is by the amplification of driving motor torque when fast
The dynamic property of speed, while in middle high speed, by reducing stepless transmission work by motor speed in lower transmission ratio
Output, enables motor to work in middle and slow speed of revolution efficient region, which compares currently used single-speed deceleration device, not only may be used
To improve vehicle low-speed dynamic and grade climbing performance, while the energy utilization rate of vehicle can be improved, and motor is not needed
Work can substantially improve power drive system because of the high rotary speed working bring vibrating noise problem of motor in high speed area,
The cost that vehicle substantially reduces driving motor and electric-control system to the high-revolving demand of motor can be reduced simultaneously.
As shown in Figure 1, realized when the adjusting of the gear ratio of stepless speed changing mechanism by hydraulic executing system, hydraulic execution
System provides hydraulic oil to driving pulley 2 and driven pulley 4, realizes the tune of the groove width size of driving pulley 2 and driven pulley 4
Section, increases or reduces the winding radius of transmission belt 3, and then realizes the adjusting of gear ratio.For driving pulley 2, when driving band
After entering hydraulic oil in wheel 2, under action of hydraulic force, the groove width of the pulley groove of driving pulley 2 reduces, the winding half of transmission belt 3
Diameter increases；For driven pulley 4, after entering hydraulic oil in driven pulley 4, under action of hydraulic force, the belt wheel of driven pulley 4
The groove width of slot reduces, and the winding radius of transmission belt 3 increases.The adjusting of the gear ratio of stepless speed changing mechanism is by transmission belt 3
The consecutive variations of winding radius and realize.
As shown in Figure 1, pressure-regulating valve 12 be two-position three way magnetic valve, have an oil inlet, an oil outlet and
One oil return opening, pressure oil circuit 13 further include the pipeline road connecting with pressure-regulating valve 12 and driving pulley 2, pressure-regulating valve
12 for adjusting the oil pressure of pipeline road, and one end of pipeline road is connect with the oil outlet of pressure-regulating valve 12, pipeline road
The other end is connect with driving pulley 2, and oil pump 7 is connect by working connection 9 with the oil inlet of pressure-regulating valve 12, what oil pump 7 pumped
Hydraulic oil enters in pressure-regulating valve 12 through working connection 9, and oil pump 7 is electric oil pump.When pressure-regulating valve 12 oil inlet with go out
When hydraulic fluid port is in connected state, oil return opening is closed, and is flowed out into the hydraulic oil in pressure-regulating valve 12 from oil outlet, hydraulic oil is again
Enter in driving pulley 2 through pipeline road；When the oil return opening of pressure-regulating valve 12 and oil outlet are when connected state, oil inlet
It closes, the hydraulic oil in driving pulley 2 enters in pressure-regulating valve 12 through pipeline road, into hydraulic in pressure-regulating valve 12
Oil is flowed out from oil return opening, and driving pulley 2 carries out draining, and the groove width of the pulley groove of driving pulley 2 increases, the winding half of transmission belt 3
Diameter reduces.
As shown in Figure 1, working connection 9 is connect with the oil inlet of the oil outlet of oil pump 7 and pressure-regulating valve 12, working connection 9 is straight
Driven pulley 4 is connect in succession, and the hydraulic oil that oil pump 7 pumps simultaneously directly can be delivered to driven pulley 4 by working connection 9, and oil pump 7 goes out
The oil pressure of oil port is adjusted, and the adjusting of the groove width size of driven pulley 4 may be implemented.
As shown in Figure 1, the first oil pressure sensor 14 for detecting oil pressure is equipped in pressure oil circuit 13, the first oil pressure sensing
Device 14 is mounted on pipeline road, and the second oil pressure sensor 11 for detecting oil pressure, the second oil pressure sensing are equipped in working connection 9
Device 11 is between oil pump 7 and pressure-regulating valve 12 in the position on working connection 9.Therefore in order to guarantee pressure oil circuit 13 and master
The accurate control of 9 oil pressure of oil circuit installs oil pressure sensor on two oil circuits respectively, is used to real-time detection practical pressure, it is ensured that
The pressure of driving pulley 2 and driven pulley 4 accurately controls.
In the present embodiment, by 7 output oil pressure of electric oil pump to working connection 9 be respectively outputted to pressure-regulating valve 12 and from
Movable belt pulley 4 also passes through change with regard to realizing so that driving pulley 2 and driven pulley 4 continuously change with the radius that engages of transmission belt 3
Pressure is also achieved that change the cone pulley axial position of driving pulley 2 and driven pulley 4 to realize the change of transmission ratio
Variable speed.
As shown in Figure 1, hydraulic executing system further includes the lubrication branch 15 connecting with working connection 9 and connects with lubrication branch 15
It connects and hydraulic oil is guided to the cooling and lubricating oil circuit 10 that at specified parts specified parts are carried out with cooling and lubricating.Driven pulley 4
The hydraulic oil of middle outflow successively enters cooling and lubricating oil circuit 10 through working connection 9 and lubrication branch 15, will by cooling and lubricating oil circuit 10
Hydraulic oil is guided to specified parts, is used to carry out cooling and lubricating to component.
Preferably, as shown in Figure 1, lubricating one end and the working connection of branch 15 equipped with restriction 8 in lubrication branch 15
9 connections, between the other end and cooling and lubricating oil circuit 10 of lubrication branch 15, restriction 8 is located between the both ends of lubrication branch 15.
Restriction 8 is set, and the hydraulic oil that restriction 8 can make oil pump 7 export reasonably is assigned to cutting oil from working connection 9
Road 10, so that very little section hydraulic oil is output to cooling and lubricating oil circuit to realize lubrication to components on working connection, it is ensured that each system
It is reasonable that system oil liquid oil is matched.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (6)
1. being suitable for the stepless speed variator system of electric car characterized by comprising
Stepless speed changing mechanism comprising driving pulley, driven pulley and the transmission being set on driving pulley and driven pulley
Band；And
Hydraulic executing system comprising oil pump, for guiding hydraulic oil to driving pulley and being used to adjust the band of driving pulley
The pressure oil circuit of race groove width and for by hydraulic oil guide to driven pulley and adjust driven pulley pulley groove groove width master
Oil circuit；Working connection is connect with pressure oil circuit and oil pump, and the pressure-regulating valve for adjusting oil pressure is equipped in pressure oil circuit.
2. the stepless speed variator system according to claim 1 suitable for electric car, which is characterized in that the pressure-regulating valve
For two-position three way magnetic valve.
3. the stepless speed variator system according to claim 1 or 2 suitable for electric car, which is characterized in that the pressure oil
The first oil pressure sensor for detecting oil pressure is equipped in road.
4. the stepless speed variator system according to any one of claims 1 to 3 suitable for electric car, which is characterized in that the master
The second oil pressure sensor for detecting oil pressure is equipped in oil circuit.
5. the stepless speed variator system according to any one of claims 1 to 4 suitable for electric car, which is characterized in that the liquid
Pressure execution system further include lubrication branch connect with the working connection and with lubrication branch connect and hydraulic oil guide to specify
At component specified parts are carried out with the cooling and lubricating oil circuit of cooling and lubricating.
6. the stepless speed variator system according to claim 5 suitable for electric car, which is characterized in that in the lubrication branch
Equipped with restriction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811646010.7A CN109854693A (en) | 2018-12-30 | 2018-12-30 | Stepless speed variator system suitable for electric car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811646010.7A CN109854693A (en) | 2018-12-30 | 2018-12-30 | Stepless speed variator system suitable for electric car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109854693A true CN109854693A (en) | 2019-06-07 |
Family
ID=66893542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811646010.7A Pending CN109854693A (en) | 2018-12-30 | 2018-12-30 | Stepless speed variator system suitable for electric car |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107663A (en) * | 2019-04-30 | 2019-08-09 | 奇瑞新能源汽车技术有限公司 | A kind of pure electric automobile CVT retarder |
| CN110985624A (en) * | 2019-12-10 | 2020-04-10 | 江苏大学 | Hydraulic inertial container capable of realizing continuous adjustable inertial mass coefficient based on stepless speed change mechanism |
| CN111746268A (en) * | 2020-06-29 | 2020-10-09 | 奇瑞汽车股份有限公司 | Electric automobile driving system |
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2018
- 2018-12-30 CN CN201811646010.7A patent/CN109854693A/en active Pending
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|---|---|---|---|---|
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| US6042501A (en) * | 1997-09-01 | 2000-03-28 | Nissan Motor Co., Ltd. | Variable control device for a continuously variable transmission |
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| US20040127313A1 (en) * | 2002-09-30 | 2004-07-01 | Jatco Ltd | Slippage prevention apparatus of belt-drive continuously variable transmission for automotive vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107663A (en) * | 2019-04-30 | 2019-08-09 | 奇瑞新能源汽车技术有限公司 | A kind of pure electric automobile CVT retarder |
| CN110985624A (en) * | 2019-12-10 | 2020-04-10 | 江苏大学 | Hydraulic inertial container capable of realizing continuous adjustable inertial mass coefficient based on stepless speed change mechanism |
| CN111746268A (en) * | 2020-06-29 | 2020-10-09 | 奇瑞汽车股份有限公司 | Electric automobile driving system |
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