CN109595321A - Pure electric vehicle stepless speed variator system - Google Patents
Pure electric vehicle stepless speed variator system Download PDFInfo
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- CN109595321A CN109595321A CN201811648658.8A CN201811648658A CN109595321A CN 109595321 A CN109595321 A CN 109595321A CN 201811648658 A CN201811648658 A CN 201811648658A CN 109595321 A CN109595321 A CN 109595321A
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- Prior art keywords
- pressure
- oil
- stepless speed
- pulley
- valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/52—Pulleys or friction discs of adjustable construction
- F16H55/54—Pulleys or friction discs of adjustable construction of which the bearing parts are radially adjustable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
Abstract
The invention discloses a kind of pure electric vehicle stepless speed variator systems, including stepless speed changing mechanism and hydraulic executing system.Stepless speed changing mechanism includes driving pulley, driven pulley and transmission belt；Hydraulic executing system includes oil pump, pressure regulation slide valve, first pressure oil circuit and second pressure oil circuit；It is equipped with the first pressure regulating valve for adjusting oil pressure in first pressure oil circuit, the second pressure regulating valve for adjusting oil pressure is equipped in second pressure oil circuit.Pure electric vehicle stepless speed variator system of the invention, 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, moreover it is possible to improve the energy utilization rate of vehicle.
Description
Technical field
The invention belongs to transmission technology fields, specifically, the present invention relates to a kind of pure electric vehicle variable speed
System.
Background technique
Typical pure electric vehicle transmission system is made of constant-speed ratio reduction gearing, and motor power is direct by reduction gearing
It is transmitted to wheel, motor power can not realize the adjusting of torque and revolving speed to adapt to vehicle driving, in order to full by retarder
Sufficient vehicle low-speed big demand and high speed travel demand, and pure electric vehicle is all by improving Motor torque and revolving speed at present
To meet the needs of 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, and driver comfort is higher pure
Electric vehicles 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 provide it is a kind of pure
Electric vehicles stepless speed variator system, 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: pure electric vehicle stepless speed variator system, 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, the pressure regulation slide valve being connect with oil pump, for the hydraulic of self-pressure regulating slide valve in future
The first pressure oil circuit of pulley groove groove width of the oil guidance to driving pulley and for adjusting driving pulley and for self-pressure regulating in future
The hydraulic oil of slide valve is guided to driven pulley and the second pressure oil circuit of the pulley groove groove width for adjusting driven pulley；First pressure
It is equipped with the first pressure regulating valve for adjusting oil pressure in power oil circuit, second for adjusting oil pressure is equipped in second pressure oil circuit
Pressure-regulating valve.
The first pressure regulating valve is two-position three way magnetic valve.
The second pressure regulating valve is two-position three way magnetic valve.
The first oil pressure sensor for detecting oil pressure is equipped in the first pressure oil circuit.
The second oil pressure sensor for detecting oil pressure is equipped in the second pressure oil circuit.
The present invention also provides a kind of pure electric vehicle stepless speed variator systems, comprising:
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, the definite value decompressed slide valve connecting with oil pump are slided for that will depressurize from definite value
The hydraulic oil of valve guide to driving pulley and for adjust driving pulley pulley groove groove width first pressure oil circuit and for will
Hydraulic oil from definite value decompressed slide valve is guided to driven pulley and the second pressure of the pulley groove groove width for adjusting driven pulley
Power oil circuit；It is equipped with the first pressure regulating valve for adjusting oil pressure in first pressure oil circuit, is equipped with and is used in second pressure oil circuit
Adjust the second pressure regulating valve of oil pressure.
The first pressure regulating valve is two-position three way magnetic valve.
The second pressure regulating valve is two-position three way magnetic valve.
The first oil pressure sensor for detecting oil pressure is equipped in the first pressure oil circuit.
The second oil pressure sensor for detecting oil pressure is equipped in the second pressure oil circuit.
Pure electric vehicle stepless speed variator system of the invention realizes stepless speed changer by the way that hydraulic executing system is arranged
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 of embodiment one；
Fig. 2 is the structural schematic diagram of embodiment two；
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, the second oil pressure sensor；9, cooling and lubricating oil circuit；10, the second pipeline；11, pressure regulation is sliding
Valve；12, second pressure regulating valve；13, working connection；14, first pressure regulating valve；15, the first pipeline；16, the first oil pressure senses
Device；17, definite value decompressed slide valve.
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.
Embodiment one
As shown in Figure 1, present embodiments providing a kind of pure electric vehicle stepless speed variator system, 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 include oil pump 7, with
Oil pump 7 connect pressure regulation slide valve 11, for self-pressure regulating slide valve in future 11 hydraulic oil guide to driving pulley 2 and for adjust drive
The first pressure oil circuit of the pulley groove groove width of movable belt pulley 2 and hydraulic oil for self-pressure regulating slide valve in future 11 are guided to driven pulley
4 and for adjust driven pulley 4 pulley groove groove width second pressure oil circuit；First pressure oil circuit and second pressure oil circuit and tune
It presses slide valve 11 to connect, is equipped with the first pressure regulating valve 14 for adjusting oil pressure in first pressure oil circuit, in second pressure oil circuit
Equipped with the second pressure regulating valve 12 for adjusting oil pressure.
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, first pressure regulating valve 14 be two-position three way magnetic valve, have an oil inlet, one it is fuel-displaced
Mouth and an oil return opening, first pressure oil circuit further includes the first pipeline connecting with first pressure regulating valve 14 and driving pulley 2
15, first pressure regulating valve 14 is used to adjust the oil pressure of the first pipeline 15, one end of the first pipeline 15 and first pressure regulating valve
14 oil outlet connection, the other end of the first pipeline 15 are connect with driving pulley 2, and pressure regulation slide valve 11 passes through working connection 13 and first
The oil inlet of pressure-regulating valve 14 connects, and the hydraulic oil that oil pump 7 pumps successively enters first through pressure regulation slide valve 11 and working connection 13
In pressure-regulating valve 14, oil pump 7 is electric oil pump.When the oil inlet and outlet of first pressure regulating valve 14 is in connected state
When, oil return opening is closed, and is flowed out into the hydraulic oil in first pressure regulating valve 14 from oil outlet, hydraulic oil is again through the first pipeline 15
Into in driving pulley 2；When the oil return opening of first pressure regulating valve 14 and oil outlet are when connected state, oil inlet is closed,
Hydraulic oil in driving pulley 2 enters in first pressure regulating valve 14 through the first pipeline 15, into first pressure regulating valve 14
Hydraulic oil flowed out from oil return opening, driving pulley 2 carries out draining, and the groove width of the pulley groove of driving pulley 2 increases, transmission belt 3
Winding radius reduces.
As shown in Figure 1, second pressure regulating valve 12 is also two-position three way magnetic valve, go out with an oil inlet, one
Hydraulic fluid port and an oil return opening, second pressure oil circuit further include the second pipe connecting with second pressure regulating valve 12 and driven pulley 4
Road 10, second pressure regulating valve 12 are used to adjust the oil pressure of the second pipeline 10, and one end of the second pipeline 10 and second pressure are adjusted
The oil outlet of valve 12 connects, and the other end of the second pipeline 10 is connect with driven pulley 4, and pressure regulation slide valve 11 passes through working connection 13 and the
The oil inlet of one pressure-regulating valve 14 connects, and the hydraulic oil that oil pump 7 pumps successively enters the through pressure regulation slide valve 11 and working connection 13
In two pressure-regulating valves 12.When the oil inlet and outlet of second pressure regulating valve 12 is in connected state, oil return opening is closed,
It is flowed out into the hydraulic oil in second pressure regulating valve 12 from oil outlet, hydraulic oil enters driven pulley 4 through the second pipeline 10 again
In；When the oil return opening of second pressure regulating valve 12 and oil outlet are when connected state, oil inlet is closed, in driven pulley 4
Hydraulic oil enters in second pressure regulating valve 12 through the second pipeline 10, into the hydraulic oil in second pressure regulating valve 12 from oil return
Mouth outflow, driven pulley 4 carry out draining, and the groove width of the pulley groove of driven pulley 4 increases, and the winding radius of transmission belt 3 reduces.
As shown in Figure 1, pressure regulation slide valve 11 is used to adjust the oil pressure of working connection 13, pressure regulation slide valve 11 have an oil inlet,
One oil outlet, a drain tap and a control terminal, the oil outlet of oil pump 7 are connect with the oil inlet of pressure regulation slide valve 11, pressure regulation
The oil outlet of slide valve 11 is connect with working connection 13, and the outlet oil pressure of oil pump 7 is output to working connection after adjusting by pressure regulation slide valve 11
13.Pressure regulation slide valve 11 and with second pressure oil circuit connection, second pressure oil circuit is connect with the control terminal of pressure regulation slide valve 11, second
While pressure-regulating valve 12 adjusts the oil pressure of second pressure oil circuit, so that the oil pressure of the oil outlet of pressure regulation slide valve 11 can also be with
It is adjusted synchronously according to the size of the output pressure of second pressure regulating valve 12, in this way when 4 internal oil pressure of driven pulley is lower
When, the output pressure of pressure regulation slide valve 11 can also reduce (namely make pressure reduction) on working connection 13, can reduce in this way
The load of oil pump 7 reduces energy consumption.Specifically, when the oil pressure that second pressure regulating valve 12 adjusts second pressure oil circuit rises,
The oil pressure of the oil outlet of pressure regulation slide valve 11, which synchronizes, to be risen；When second pressure regulating valve 12 adjusts the oil of second pressure oil circuit
When drops, the oil pressure of the oil outlet of pressure regulation slide valve 11, which synchronizes, to be declined.
As shown in Figure 1, hydraulic executing system further includes connecting with pressure regulation slide valve 11 and hydraulic oil is guided to specified parts
Specified parts are carried out with the cooling and lubricating oil circuit 9 of cooling and lubricating, the drain tap company of cooling and lubricating oil circuit 9 and pressure regulation slide valve 11
It connects.
As shown in Figure 1, being equipped with the first oil pressure sensor 16 for detecting oil pressure in first pressure oil circuit, the first oil pressure is passed
Sensor 16 is mounted on the first pipeline 15, is equipped with the second oil pressure sensor 8 for detecting oil pressure in second pressure oil circuit, and second
Oil pressure sensor 8 is mounted on the second pipeline 10.Therefore the essence in order to guarantee first pressure oil circuit and second pressure oil circuit oil pressure
Really control, oil pressure sensor is installed respectively on two oil circuits, be used to real-time detection practical pressure, it is ensured that driving pulley 2 and from
The pressure of movable belt pulley 4 accurately controls.
In the present embodiment, two pressure-regulating valves are respectively outputted to working connection 13 by electric oil pump output oil pressure,
The pressure oil circuit pressure of driving pulley 2 and driven pulley 4 is controlled by control pressure-regulating valve so that driving pulley 2 and from
Movable belt pulley 4 continuously changes with the radius that engages of transmission belt 3, also just realizes by changing pressure and changes driving pulley 2 and driven
The cone pulley axial position of belt wheel 4 is also achieved that variable speed to realize the change of transmission ratio.
Embodiment two
As shown in Fig. 2, present embodiments providing a kind of pure electric vehicle stepless speed variator system, 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 include oil pump 7, with
Oil pump 7 connect definite value decompressed slide valve 17, for by the hydraulic oil from definite value decompressed slide valve 17 guide to driving pulley 2 and use
In the first pressure oil circuit for the pulley groove groove width for adjusting driving pulley 2 and for drawing the hydraulic oil from definite value decompressed slide valve 17
It is directed at the second pressure oil circuit of driven pulley 4 and the pulley groove groove width for adjusting driven pulley 4；First pressure oil circuit and second
Pressure oil circuit is connect with definite value decompressed slide valve 17, and the first pressure regulating valve for adjusting oil pressure is equipped in first pressure oil circuit
14, the second pressure regulating valve 12 for adjusting oil pressure is equipped in second pressure oil circuit.
As shown in Fig. 2, 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 Fig. 2, 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 Fig. 2, first pressure regulating valve 14 be two-position three way magnetic valve, have an oil inlet, one it is fuel-displaced
Mouth and an oil return opening, first pressure oil circuit further includes the first pipeline connecting with first pressure regulating valve 14 and driving pulley 2
15, first pressure regulating valve 14 is used to adjust the oil pressure of the first pipeline 15, one end of the first pipeline 15 and first pressure regulating valve
14 oil outlet connection, the other end of the first pipeline 15 connect with driving pulley 2, definite value decompressed slide valve 17 pass through working connection 13 and
The oil inlet of first pressure regulating valve 14 connects, and the hydraulic oil that oil pump 7 pumps is successively through definite value decompressed slide valve 17 and working connection 13
Into in first pressure regulating valve 14, oil pump 7 is electric oil pump.When the oil inlet and outlet of first pressure regulating valve 14 is in
When connected state, oil return opening is closed, and is flowed out into the hydraulic oil in first pressure regulating valve 14 from oil outlet, and hydraulic oil is again through the
One pipeline 15 enters in driving pulley 2；When the oil return opening of first pressure regulating valve 14 and oil outlet are when connected state, oil inlet
Mouth is closed, and the hydraulic oil in driving pulley 2 enters in first pressure regulating valve 14 through the first pipeline 15, is adjusted into first pressure
Hydraulic oil in valve 14 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, transmission
Winding radius with 3 reduces.
As shown in Fig. 2, second pressure regulating valve 12 is also two-position three way magnetic valve, go out with an oil inlet, one
Hydraulic fluid port and an oil return opening, second pressure oil circuit further include the second pipe connecting with second pressure regulating valve 12 and driven pulley 4
Road 10, second pressure regulating valve 12 are used to adjust the oil pressure of the second pipeline 10, and one end of the second pipeline 10 and second pressure are adjusted
The oil outlet of valve 12 connects, and the other end of the second pipeline 10 is connect with driven pulley 4, and definite value decompressed slide valve 17 passes through working connection 13
It is connect with the oil inlet of first pressure regulating valve 14, the hydraulic oil that oil pump 7 pumps is successively through definite value decompressed slide valve 17 and working connection
13 enter in second pressure regulating valve 12.When the oil inlet and outlet of second pressure regulating valve 12 is in connected state, return
Hydraulic fluid port is closed, and is flowed out into the hydraulic oil in second pressure regulating valve 12 from oil outlet, and hydraulic oil enters through the second pipeline 10 again
In driven pulley 4；When the oil return opening of second pressure regulating valve 12 and oil outlet are when connected state, oil inlet is closed, driven
Hydraulic oil in belt wheel 4 enters in second pressure regulating valve 12 through the second pipeline 10, the liquid into second pressure regulating valve 12
Pressure oil is flowed out from oil return opening, and driven pulley 4 carries out draining, and the groove width of the pulley groove of driven pulley 4 increases, the winding of transmission belt 3
Radius reduces.
As shown in Fig. 2, definite value decompressed slide valve 17, for keeping the oil pressure of working connection 13 constant, definite value decompressed slide valve 17 has one
A oil inlet, an oil outlet and a drain tap, the oil outlet of oil pump 7 are connect with the oil inlet of definite value decompressed slide valve 17, fixed
The oil outlet of value decompressed slide valve 17 is connect with working connection 13, and the outlet oil pressure of oil pump 7 is defeated after being adjusted by definite value decompressed slide valve 17
Working connection 13 is arrived out.The hydraulic oil that oil pump 7 pumps is after definite value decompressed slide valve 17, pressure reduction, with definite value decompressed slide valve 17
The pressure of the working connection 13 being connected to be maintained at setting value constant.
As shown in Fig. 2, hydraulic executing system further includes connecting with definite value decompressed slide valve 17 and hydraulic oil is guided to specifying part
At part specified parts are carried out with the cooling and lubricating oil circuit 9 of cooling and lubricating, cooling and lubricating oil circuit 9 is let out with definite value decompressed slide valve 17
Hydraulic fluid port connection.
As shown in Fig. 2, being equipped with the first oil pressure sensor 16 for detecting oil pressure in first pressure oil circuit, the first oil pressure is passed
Sensor 16 is mounted on the first pipeline 15, is equipped with the second oil pressure sensor 8 for detecting oil pressure in second pressure oil circuit, and second
Oil pressure sensor 8 is mounted on the second pipeline 10.Therefore the essence in order to guarantee first pressure oil circuit and second pressure oil circuit oil pressure
Really control, oil pressure sensor is installed respectively on two oil circuits, be used to real-time detection practical pressure, it is ensured that driving pulley 2 and from
The pressure of movable belt pulley 4 accurately controls.
In the present embodiment, two pressure-regulating valves are respectively outputted to working connection 13 by electric oil pump output oil pressure,
The pressure oil circuit pressure of driving pulley 2 and driven pulley 4 is controlled by control pressure-regulating valve so that driving pulley 2 and from
Movable belt pulley 4 continuously changes with the radius that engages of transmission belt 3, also just realizes by changing pressure and changes driving pulley 2 and driven
The cone pulley axial position of belt wheel 4 is also achieved that variable speed to realize the change of transmission ratio.
In the present embodiment, setting definite value decompressed slide valve 17 makes simpler in system structure, but to electric oil pump
Control requires to increase, and may be implemented and the same effect of embodiment one by improving electrodynamic pump control precision.
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 (10)
1. pure electric vehicle stepless speed variator system 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, the pressure regulation slide valve connecting with oil pump draw for the hydraulic oil of self-pressure regulating slide valve in future
It is directed at the first pressure oil circuit of driving pulley and the pulley groove groove width for adjusting driving pulley and for self-pressure regulating in future slide valve
Hydraulic oil guide to driven pulley and for adjust driven pulley pulley groove groove width second pressure oil circuit；First pressure oil
It is equipped with the first pressure regulating valve for adjusting oil pressure in road, the second pressure for adjusting oil pressure is equipped in second pressure oil circuit
Regulating valve.
2. pure electric vehicle stepless speed variator system according to claim 1, which is characterized in that the first pressure is adjusted
Valve is two-position three way magnetic valve.
3. pure electric vehicle stepless speed variator system according to claim 1, which is characterized in that the second pressure is adjusted
Valve is two-position three way magnetic valve.
4. pure electric vehicle stepless speed variator system according to any one of claims 1 to 3, which is characterized in that described first
The first oil pressure sensor for detecting oil pressure is equipped in pressure oil circuit.
5. pure electric vehicle stepless speed variator system according to any one of claims 1 to 4, which is characterized in that described second
The second oil pressure sensor for detecting oil pressure is equipped in pressure oil circuit.
6. pure electric vehicle stepless speed variator system 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, the definite value decompressed slide valve being connect with oil pump, for will be from definite value decompressed slide valve
Hydraulic oil guide to driving pulley and for adjust driving pulley pulley groove groove width first pressure oil circuit and for that will come from
The hydraulic oil of definite value decompressed slide valve is guided to driven pulley and the second pressure oil of the pulley groove groove width for adjusting driven pulley
Road；It is equipped with the first pressure regulating valve for adjusting oil pressure in first pressure oil circuit, is equipped in second pressure oil circuit for adjusting
The second pressure regulating valve of oil pressure.
7. pure electric vehicle stepless speed variator system according to claim 6, which is characterized in that the first pressure is adjusted
Valve is two-position three way magnetic valve.
8. pure electric vehicle stepless speed variator system according to claim 6, which is characterized in that the second pressure is adjusted
Valve is two-position three way magnetic valve.
9. according to any pure electric vehicle stepless speed variator system of claim 6 to 8, which is characterized in that described first
The first oil pressure sensor for detecting oil pressure is equipped in pressure oil circuit.
10. according to any pure electric vehicle stepless speed variator system of claim 6 to 9, which is characterized in that described second
The second oil pressure sensor for detecting oil pressure is equipped in pressure oil circuit.
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| CN201811648658.8A CN109595321A (en) | 2018-12-30 | 2018-12-30 | Pure electric vehicle stepless speed variator system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811648658.8A CN109595321A (en) | 2018-12-30 | 2018-12-30 | Pure electric vehicle stepless speed variator system |
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| CN109595321A true CN109595321A (en) | 2019-04-09 |
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| CN201811648658.8A Pending CN109595321A (en) | 2018-12-30 | 2018-12-30 | Pure electric vehicle stepless speed variator system |
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