CN209781593U - Stepless speed change system suitable for electric automobile - Google Patents
Stepless speed change system suitable for electric automobile Download PDFInfo
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- CN209781593U CN209781593U CN201822261911.6U CN201822261911U CN209781593U CN 209781593 U CN209781593 U CN 209781593U CN 201822261911 U CN201822261911 U CN 201822261911U CN 209781593 U CN209781593 U CN 209781593U
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Abstract
The utility model discloses a stepless speed change system suitable for an electric automobile, which comprises a stepless speed change mechanism and a hydraulic execution system; the stepless speed change mechanism comprises a driving belt wheel, a driven belt wheel and a transmission belt arranged on the driving belt wheel and the driven belt wheel; the hydraulic execution system comprises an oil pump, a pressure oil path and a main oil path; the main oil path is connected with the pressure oil path and the oil pump, and a pressure regulating valve for regulating oil pressure is arranged in the pressure oil path. The utility model discloses be suitable for electric automobile's infinitely variable system, through setting up hydraulic pressure actuating system, realize infinitely variable mechanism's gear ratio regulation, can be so that whole infinitely variable system can realize high-efficient energy-conservation and reduce the cost that whole car was used, not only can improve whole car low-speed dynamic nature and climbing performance, can improve the energy consumption utilization ratio of whole car simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the derailleur, specifically speaking, the utility model relates to a be suitable for electric automobile's infinitely variable system.
Background
a typical electric automobile transmission system is composed of a fixed-speed-ratio reduction gear, motor power is directly transmitted to wheels through the reduction gear, the motor power cannot adjust torque and rotating speed through a speed reducer to adapt to automobile running, and in order to meet the requirements of low-speed large-torque and high-speed running of the whole automobile, the requirement of the whole automobile is met by improving the torque and the rotating speed of the motor in the conventional electric automobile.
Although the current electric drive system can basically meet the use requirement of the whole vehicle, the current system has large limitation, and compared with the traditional vehicle, the power performance and the maximum vehicle speed of the current electric drive system are obviously lower, the pure electric consumption is high, the cost of the whole vehicle is higher, and the problem of vibration noise is prominent due to the high rotating speed operation of a motor. In order to solve a series of disadvantages caused by a single reduction gear system, patent document CN104534037A discloses a two-speed automatic transmission for an electrically driven vehicle, which includes an input shaft, an intermediate shaft, a first cylindrical gear pair, a second cylindrical gear pair, a third cylindrical gear pair, a first torque transmission device, a second torque transmission device, a planetary gear transmission device, and a differential assembly. Compared with a single-stage speed reducer, the scheme increases one gear, and effectively improves the dynamic property and the power consumption property of the original electric drive system; however, only two gears are provided, so that the efficiency and the torque of the motor cannot be exerted to the maximum extent, the dynamic performance and the power consumption performance of the pure electric vehicle cannot be exerted to the maximum level, and simultaneously, due to the large-range sudden change of the rotating speed of the motor existing in the switching process of the two gears, the impact feeling of the whole vehicle can be generated, and the driving comfort of the whole vehicle is influenced. Therefore, a continuously variable transmission system for an electric vehicle, which has more complete functions, lower power consumption, and higher driving comfort, is required.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a be suitable for electric automobile's infinitely variable speed system, the purpose improves the energy consumption utilization ratio of whole car.
In order to realize the purpose, the utility model discloses the technical scheme who takes does: a continuously variable transmission system for an electric vehicle, comprising:
The stepless speed change mechanism comprises a driving belt wheel, a driven belt wheel and a transmission belt arranged on the driving belt wheel and the driven belt wheel; and
A hydraulic actuator system including an oil pump, a pressure oil passage for guiding hydraulic oil to the drive pulley and for adjusting a pulley groove width of the drive pulley, and a main oil passage for guiding hydraulic oil to the driven pulley and for adjusting a pulley groove width of the driven pulley; the main oil path is connected with the pressure oil path and the oil pump, and a pressure regulating valve for regulating oil pressure is arranged in the pressure oil path.
The pressure regulating valve is a two-position three-way electromagnetic valve.
And a first oil pressure sensor for detecting oil pressure is arranged in the pressure oil path.
And a second oil pressure sensor for detecting oil pressure is arranged in the main oil way.
The hydraulic execution system further comprises a lubricating branch connected with the main oil way and a cooling and lubricating oil way which is connected with the lubricating branch and used for guiding hydraulic oil to the specified component to cool and lubricate the specified component.
And a throttling opening is arranged in the lubricating branch.
The utility model discloses be suitable for electric automobile's infinitely variable system, through setting up hydraulic pressure actuating system, realize infinitely variable mechanism's gear ratio regulation, can be so that whole infinitely variable system can realize high-efficient energy-conservation and reduce the cost that whole car was used, not only can improve whole car low-speed dynamic and climbing performance, can improve the energy consumption utilization ratio of whole car simultaneously, and make the motor not need work in high rotational speed region, can improve the vibration noise problem that electric drive system brought because of the work of the high rotational speed of motor greatly, can reduce whole car cost to motor high-rotational speed demand greatly reduced driving motor and electrical system simultaneously.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic structural diagram of a continuously variable transmission system for an electric vehicle according to the present invention;
Labeled as: 1. a drive motor; 2. a drive pulley; 3. a transmission belt; 4. a driven pulley; 5. a reduction drive gear; 6. a reduction driven gear; 7. an oil pump; 8. a choke; 9. a main oil path; 10. cooling the lubricating oil path; 11. a second oil pressure sensor; 12. a pressure regulating valve; 13. a pressure oil path; 14. a first oil pressure sensor; 15. and a lubrication branch.
Detailed Description
the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.
as shown in fig. 1, the present invention provides a continuously variable transmission system for an electric vehicle, which includes a continuously variable transmission mechanism and a hydraulic actuator system for adjusting a transmission ratio of the continuously variable transmission mechanism. The stepless speed change mechanism comprises a driving belt wheel 2, a driven belt wheel 4 and an annular transmission belt 3 which is arranged on the driving belt wheel 2 and the driven belt wheel 4; the hydraulic actuator system includes an oil pump 7, a pressure oil passage 13 for guiding hydraulic oil to the drive pulley 2 and for adjusting the pulley groove width of the drive pulley 2, and a main oil passage 9 for guiding hydraulic oil to the driven pulley 4 and for adjusting the pulley groove width of the driven pulley 4; the main oil passage 9 is connected to a pressure oil passage 13 and the oil pump 7, and the pressure oil passage 13 is provided with a pressure regulating valve 12 for regulating oil pressure.
As shown in fig. 1, the continuously variable transmission mechanism is a belt type continuously variable transmission, one end of a transmission belt 3 is wound around a driving pulley 2, the other end of the transmission belt 3 is wound around a driven pulley 4, the driving pulley 2 of the continuously variable transmission mechanism is connected with a driving motor 1, the driving pulley 2 receives power generated by the driving motor 1, the driven pulley 4 is connected with a differential through a speed reduction mechanism, the speed reduction mechanism plays a role of speed reduction and torque increase, the speed reduction mechanism is a primary gear mechanism and realizes power transmission, and the speed reduction mechanism comprises a speed reduction driving gear 5 coaxially arranged with the driven pulley 4 and a speed reduction driven gear 6 fixedly arranged on a shell of the differential and meshed with the speed reduction driving gear 5. When the driving motor 1 drives the vehicle to run, the power generated by the driving motor 1 is output to the wheels through the stepless speed change mechanism, the speed reduction mechanism and the differential mechanism, stepless speed regulation can be realized through the stepless speed changer, the stepless speed changer is enabled to work at a large transmission ratio to amplify the torque of the driving motor and then output the amplified torque to the wheels to improve the low-speed power performance of the whole vehicle when the vehicle speed is low, and the stepless speed changer is enabled to work at a lower transmission ratio to reduce the rotating speed output of the motor when the vehicle speed is medium-high, so that the motor can work in a medium-low rotating speed high-efficiency area, compared with a single-speed-ratio speed reducer which is commonly used at present, the system not only can improve the low-speed power performance and the climbing performance of the whole vehicle, but also can improve the energy utilization rate of the whole vehicle, and the motor does not need to work, meanwhile, the requirement of the whole vehicle on high rotating speed of the motor can be reduced, and the cost of the driving motor and the electric control system is greatly reduced.
As shown in fig. 1, the adjustment of the transmission ratio of the continuously variable transmission mechanism is performed by a hydraulic actuator system that supplies hydraulic oil to the drive pulley 2 and the driven pulley 4 to adjust the groove widths of the drive pulley 2 and the driven pulley 4, and increases or decreases the winding radius of the transmission belt 3 to adjust the transmission ratio. For the driving belt wheel 2, after hydraulic oil enters the driving belt wheel 2, under the action of the hydraulic oil, the groove width of a belt wheel groove of the driving belt wheel 2 is reduced, and the winding radius of the transmission belt 3 is increased; when the hydraulic oil is introduced into the driven pulley 4, the groove width of the pulley groove of the driven pulley 4 is reduced by the hydraulic oil, and the winding radius of the transmission belt 3 is increased for the driven pulley 4. The adjustment of the gear ratio of the continuously variable transmission mechanism is achieved by a continuous change in the winding radius of the transmission belt 3.
As shown in fig. 1, the pressure regulating valve 12 is a two-position three-way electromagnetic valve, which has an oil inlet, an oil outlet and an oil return port, the pressure oil path 13 further includes an oil delivery pipeline connected to the pressure regulating valve 12 and the driving pulley 2, the pressure regulating valve 12 is used for regulating the oil pressure of the oil delivery pipeline, one end of the oil delivery pipeline is connected to the oil outlet of the pressure regulating valve 12, the other end of the oil delivery pipeline is connected to the driving pulley 2, the oil pump 7 is connected to the oil inlet of the pressure regulating valve 12 through a main oil path 9, the hydraulic oil pumped by the oil pump 7 enters the pressure regulating valve 12 through the main oil path 9, and. When the oil inlet and the oil outlet of the pressure regulating valve 12 are in a communicated state, the oil return port is closed, hydraulic oil entering the pressure regulating valve 12 flows out of the oil outlet, and then enters the driving belt wheel 2 through the oil pipeline; when the oil return port of the pressure regulating valve 12 is in a communicated state with the oil outlet, the oil inlet is closed, the hydraulic oil in the driving belt wheel 2 enters the pressure regulating valve 12 through the oil conveying pipeline, the hydraulic oil entering the pressure regulating valve 12 flows out from the oil return port, oil drainage is carried out on the driving belt wheel 2, the groove width of the belt wheel groove of the driving belt wheel 2 is increased, and the winding radius of the transmission belt 3 is reduced.
As shown in fig. 1, the main oil path 9 is connected to an oil outlet of the oil pump 7 and an oil inlet of the pressure regulating valve 12, the main oil path 9 is directly connected to the driven pulley 4, the main oil path 9 can directly convey hydraulic oil pumped by the oil pump 7 to the driven pulley 4, and the oil pressure at an oil outlet of the oil pump 7 is adjusted to adjust the groove width of the driven pulley 4.
As shown in fig. 1, a first oil pressure sensor 14 for detecting an oil pressure is provided in the pressure oil passage 13, the first oil pressure sensor 14 is mounted on the oil delivery passage, a second oil pressure sensor 11 for detecting an oil pressure is provided in the main oil passage 9, and the second oil pressure sensor 11 is located between the oil pump 7 and the pressure regulating valve 12 on the main oil passage 9. Therefore, in order to ensure accurate control of the oil pressures of the pressure oil line 13 and the main oil line 9, oil pressure sensors are respectively installed on the two oil lines for detecting the actual pressure in real time and ensuring accurate control of the pressures of the driving pulley 2 and the driven pulley 4.
In this embodiment, the oil pressure output from the electric oil pump 7 to the main oil passage 9 is output to the pressure regulating valve 12 and the driven pulley 4, respectively, so that the engagement radius between the driving pulley 2 and the driven pulley 4 and the transmission belt 3 is continuously changed, and the change of the axial position of the cone pulley of the driving pulley 2 and the driven pulley 4 by changing the pressure is realized, thereby realizing the change of the transmission ratio, and realizing the stepless speed change.
As shown in fig. 1, the hydraulic actuator system further includes a lubrication branch passage 15 connected to the main oil passage 9, and a cooling and lubricating oil passage 10 connected to the lubrication branch passage 15 and through which hydraulic oil is guided to a specified component to cool and lubricate the specified component. The hydraulic oil flowing out of the driven pulley 4 sequentially enters the cooling and lubricating oil path 10 through the main oil path 9 and the lubricating branch 15, and the hydraulic oil is guided to a specified part by the cooling and lubricating oil path 10 to cool and lubricate the part.
preferably, as shown in fig. 1, a throttle 8 is provided in the lubrication branch 15, one end of the lubrication branch 15 is connected to the main oil passage 9, the other end of the lubrication branch 15 is connected to the cooling and lubrication oil passage 10, and the throttle 8 is located between both ends of the lubrication branch 15. The throttling opening 8 is arranged, the hydraulic oil output by the oil pump 7 can be reasonably distributed to the cooling and lubricating oil path 10 from the main oil path 9 through the throttling opening 8, so that a small part of hydraulic oil on the main oil path is output to the cooling and lubricating oil path to lubricate parts, and the oil-liquid-oil distribution of each system is reasonable.
The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.
Claims (6)
1. Continuously variable transmission system for an electric vehicle, characterized in that it comprises:
The stepless speed change mechanism comprises a driving belt wheel, a driven belt wheel and a transmission belt arranged on the driving belt wheel and the driven belt wheel; and
a hydraulic actuator system including an oil pump, a pressure oil passage for guiding hydraulic oil to the drive pulley and for adjusting a pulley groove width of the drive pulley, and a main oil passage for guiding hydraulic oil to the driven pulley and for adjusting a pulley groove width of the driven pulley; the main oil path is connected with the pressure oil path and the oil pump, and a pressure regulating valve for regulating oil pressure is arranged in the pressure oil path.
2. The continuously variable transmission system for electric vehicles according to claim 1, wherein the pressure regulating valve is a two-position three-way solenoid valve.
3. The continuously variable transmission system for an electric vehicle according to claim 1, wherein a first oil pressure sensor for detecting an oil pressure is provided in the pressure oil passage.
4. The continuously variable transmission system according to any one of claims 1 to 3, wherein a second oil pressure sensor for detecting an oil pressure is provided in the main oil passage.
5. the continuously variable transmission system for an electric vehicle according to any one of claims 1 to 3, wherein the hydraulic actuator system further includes a lubrication branch passage connected to the main oil passage, and a cooling and lubrication oil passage connected to the lubrication branch passage and through which hydraulic oil is introduced to a specified component to cool and lubricate the specified component.
6. The continuously variable transmission system for electric vehicles according to claim 5, wherein a choke is provided in the lubrication branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822261911.6U CN209781593U (en) | 2018-12-30 | 2018-12-30 | Stepless speed change system suitable for electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822261911.6U CN209781593U (en) | 2018-12-30 | 2018-12-30 | Stepless speed change system suitable for electric automobile |
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| CN209781593U true CN209781593U (en) | 2019-12-13 |
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| CN201822261911.6U Active CN209781593U (en) | 2018-12-30 | 2018-12-30 | Stepless speed change system suitable for electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854693A (en) * | 2018-12-30 | 2019-06-07 | 芜湖万里扬变速器有限公司 | Stepless speed variator system suitable for electric car |
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- 2018-12-30 CN CN201822261911.6U patent/CN209781593U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854693A (en) * | 2018-12-30 | 2019-06-07 | 芜湖万里扬变速器有限公司 | Stepless speed variator system suitable for electric car |
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