CN112081914B - Electric drive system based on electromagnetic power-assisted gear shifting and synchronizer structure - Google Patents
Electric drive system based on electromagnetic power-assisted gear shifting and synchronizer structure Download PDFInfo
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- CN112081914B CN112081914B CN202011060899.8A CN202011060899A CN112081914B CN 112081914 B CN112081914 B CN 112081914B CN 202011060899 A CN202011060899 A CN 202011060899A CN 112081914 B CN112081914 B CN 112081914B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000004134 energy conservation Methods 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
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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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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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
- F16H61/04—Smoothing ratio shift
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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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses an electric drive system based on an electromagnetic power-assisted gear shifting and synchronizer structure, which comprises a driving motor, an input shaft, a synchronizer, a magnetic steel disc, a conductive aluminum disc, an output shaft and a differential mechanism, wherein the input shaft is connected with the input shaft; the power output shaft of the driving motor is fixedly connected with the input shaft coaxially, a first gear and a second gear are arranged on the input shaft, and a synchronizer is arranged between the first gear and the second gear; a third gear is sleeved above the input shaft, a coil group and a conductive slip ring are fixed on the third gear, the coil group is arranged opposite to the conductive aluminum disc, the coil group is electrically connected with the conductive slip ring, and the conductive slip ring is connected with a controllable power supply; the output shaft is respectively connected with the input shaft and the differential mechanism through gear sets; the power of the driving motor is transmitted to an output shaft and a gear set through an input shaft, the output shaft is transmitted to a differential mechanism through the gear set, and the differential mechanism is transmitted to wheels through two half shafts; the two-gear electric drive system with the synchronizer structure can realize power-interruption-free gear shifting and reduce energy consumption.
Description
Technical Field
The invention belongs to the technical field of automobile electric drive, and particularly relates to an electric drive system based on an electromagnetic power-assisted gear shifting and synchronizer structure.
Background
When the motor system in the prior art is matched with the whole vehicle, the contradiction between the highest vehicle speed and the maximum climbing gradient exists, so that a two-gear speed change mechanism is used for meeting the design requirement, but the existing two-gear shift system has the problem of gear shift power interruption, and the technical problem needs to be solved.
Disclosure of Invention
The invention aims to: the invention aims to overcome the defects of the prior art and provides an electric drive system based on an electromagnetic power-assisted gear shifting and synchronizer structure.
The technical scheme for realizing the invention is as follows:
The invention discloses an electric drive system based on an electromagnetic power-assisted gear shifting and synchronizer structure, which comprises a driving motor, an input shaft, a synchronizer, a magnetic steel disc, a conductive aluminum disc, an output shaft and a differential mechanism, wherein the input shaft is connected with the driving motor; the power output shaft of the driving motor is fixedly connected with the input shaft in a coaxial way, a first gear and a second gear are arranged on the input shaft, and a synchronizer is arranged between the first gear and the second gear; a third gear is sleeved above the input shaft, a coil group and a conductive slip ring are fixed on the third gear, the coil group is arranged opposite to the conductive aluminum disc, the coil group is electrically connected with the conductive slip ring, and the conductive slip ring is connected with a controllable power supply; the output shaft is provided with a gear set, and the output shaft is respectively connected with an input shaft and a differential mechanism through the gear set;
The power of the driving motor is transmitted to an output shaft and a gear set through an input shaft, the output shaft is transmitted to a differential mechanism through the gear set, and the differential mechanism is transmitted to wheels through two half shafts;
when the automobile needs to be shifted, the gear shifting is divided into two conditions of upshift and downshift:
When the vehicle speed is increased to the gear needing to be upshifted, the driving motor is switched from a torque control state to a constant power control state; the controllable power supply provides current, the current reaches the coil assembly through the conductive slip ring, the magnetic field generated by the coil assembly generates induced current in the conductive aluminum disc after being guided by the magnetic conductive steel disc, and the induced current enables the third gear to generate torque under the action of the magnetic field generated by the coil assembly; setting the current of the controllable power supply, enabling the torque of the third gear to be the same as the torque of the driving motor, enabling the torque on the synchronizer to be zero, enabling the synchronizer to be adjusted to a neutral gear at the moment, controlling the controllable power supply to increase the current, increasing the torque, and reducing the rotating speed of the driving motor; when the rotation speed of the input shaft is the same as that of the second gear, the synchronizer is connected with the second gear, then the current of the controllable power supply is reduced to zero, the driving motor returns to a torque control state, and the upshift action is completed;
When the vehicle speed is reduced to the gear needing to be shifted down, the driving motor is switched from a torque control state to a constant power control state; the controllable power supply provides current, the current reaches the coil assembly through the conductive slip ring, the magnetic field generated by the coil assembly generates induced current in the conductive aluminum disc after being guided by the magnetic conductive steel disc, and the induced current enables the third gear to generate torque under the action of the magnetic field generated by the coil assembly; setting the current of the controllable power supply, enabling the torque of the third gear to be the same as the torque of the driving motor, enabling the torque on the synchronizer to be zero, enabling the synchronizer to be adjusted to a neutral gear at the moment, controlling the controllable power supply to enable the current to be reduced, enabling the torque to be reduced, and enabling the rotation speed of the driving motor to be increased; when the rotation speed of the input shaft is the same as that of the first gear, the synchronizer is connected with the first gear, then the current of the controllable power supply is reduced to zero, the driving motor returns to a torque control state, and the gear reduction action is completed. The invention realizes a two-gear electric drive system of a synchronizer structure and realizes power-interruption-free gear shifting.
The gear set comprises a fourth gear, a fifth gear, a sixth gear and a seventh gear; the output shaft is sequentially sleeved with a fourth gear, a fifth gear, a sixth gear and a one-way clutch; the fourth gear is in meshed connection with the first gear; the fifth gear is in meshed connection with an external gear on the differential mechanism; the sixth gear is in meshed connection with the second gear; the one-way clutch is provided with a seventh gear which is meshed with the third gear. The one-way clutch is used in the invention, so that the seventh gear and the third gear can not rotate along with the gear when the gear is not shifted, friction loss and oil stirring loss of each part are reduced, and energy conservation and emission reduction are realized.
Preferably, when the number of teeth of the fourth gear/the number of teeth of the first gear=i1, the number of teeth of the sixth gear/the number of teeth of the second gear=i2, and the number of teeth of the seventh gear/the number of teeth of the third gear=i3, the relationship of i1, i2, and i3 is i1> i2> i3; the number of teeth of the seventh gear is the minimum value compared with the number of teeth of the third gear, the rotating speed of the third gear is lower than the rotating speed of an input shaft on the driving motor, and because the magnetic steel disc and the conductive aluminum disc are directly fixed on the input shaft, the rotating speeds of the magnetic steel disc and the conductive aluminum disc are lower than the rotating speed of the third gear, and the coil group on the third gear, the magnetic steel disc and the conductive aluminum disc have differential speeds, so that electromagnetic force is generated.
Preferably, each group of coils of the coil group is provided with a leading-out end after being connected in series, and the coil group is connected with a copper ring on the conductive slip ring through the leading-out end and a wire.
Preferably, the conductive slip ring is provided with a graphite contact, and the conductive slip ring is connected with a controllable power supply through the graphite contact and a wire.
Preferably, the synchronizer is connected or disconnected with any one of the first gear and the second gear, and the synchronizer is mounted on the input shaft through a sliding sleeve.
Preferably, the coil assembly is not in contact with the conductive aluminum disc.
The electric drive system only works during gear shifting, except for gear shifting, the electric drive system does not work, so that the energy consumption can be reduced, and the service life of the electric drive system can be prolonged; in the invention, the third gear is sleeved on the input shaft in an empty way, the conductive aluminum disc is fixed on the input shaft, when the coil assembly is electrified, the torque on the conductive aluminum disc can be transmitted to the third gear through electromagnetic force, and when the coil assembly is not electrified, the third gear is in a free state, and because the electric drive system only electrifies the coil assembly when in gear shifting, the third gear moves when in gear shifting; when the vehicle is reversed, although the coil assembly is not electrified, the one-way clutch drives the seventh gear to move, and the seventh gear is meshed with the third gear, so that the third gear also moves when the vehicle is reversed, and therefore, the third gear and the mechanical connecting part thereof only move when the vehicle is shifted and reversed, namely, the third gear and the mechanical connecting part thereof do not rotate along with the vehicle system except the shifting and reversing, thereby effectively reducing the energy consumption of the vehicle system.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) The electric drive system realizes a two-gear electric drive system with a synchronizer structure, and an electromagnetic power-assisted gear shifting system arranged on an input shaft in the electric drive system is utilized to realize power-free interruption gear shifting, so that the electric drive system is in stable transition, and the comfort of an automobile is improved; the electric drive system is simple in arrangement and convenient to operate, achieves the purposes of energy conservation and emission reduction, occupies little automobile space, and is favorable for market popularization and application.
(2) The electric drive system only works when the automobile shifts gears, and the rest time is in a non-working state, so that the design can effectively reduce the energy consumption of the electric drive system and prolong the service life of the electric drive system, thereby realizing the purposes of energy conservation and emission reduction.
(3) The third gear and the mechanical connecting component thereof in the invention do not rotate along with the automobile system except when the automobile shifts and backs a car, so that the energy consumption of the automobile system is effectively reduced.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:
fig. 1 is a schematic diagram of an electric drive system according to the present invention.
In the figure, a 1-driving motor, a 2-input shaft, a 3-first gear, a 4-synchronizer, a 5-second gear, a 6-magnetic steel disc, a 7-conductive aluminum disc, an 8-third gear, a 9-coil group, a 10-conductive slip ring, an 11-controllable power supply, a 12-output shaft, a 13-fourth gear, a 14-fifth gear, a 15-sixth gear, a 16-seventh gear, a 17-one-way clutch, an 18-external gear and a 19-differential.
Detailed Description
The technical scheme of the invention is described in detail below through the drawings, but the protection scope of the invention is not limited to the embodiments.
Examples: an electric drive system based on electromagnetic power-assisted gear shifting and synchronizer structure is shown in fig. 1, and comprises a driving motor 1, an input shaft 2, a synchronizer 4, a magnetic conduction steel disc 6, an electric conduction aluminum disc 7, an output shaft 12 and a differential mechanism 19; the power output shaft 12 of the driving motor 1 is fixedly connected with the input shaft 2 coaxially, a first gear 3 and a second gear 5 are arranged on the input shaft 2, a synchronizer 4 is arranged between the first gear 3 and the second gear 5, the synchronizer 4 is connected with any one of the first gear 3 and the second gear 5 or is not connected with the gear, the synchronizer 4 is arranged on the input shaft 2 through a sliding sleeve, and the position of the synchronizer is regulated and controlled through a control shifting fork in the embodiment; a third gear 8 is sleeved above the input shaft 2, a coil group 9 and a conductive slip ring 10 are fixed on the third gear 8, the coil group 9 is arranged opposite to the conductive aluminum disc 7, and the conductive aluminum disc 7 is not contacted with the coil group 9; the coil group 9 is electrically connected with the conductive slip ring 10, two leading-out ends are arranged after the coils of the coil group 9 are connected in series, and the two leading-out ends on the coil group 9 are electrically connected with the two copper rings on the conductive slip ring through wires; the conductive slip ring 10 is connected with a controllable power supply 11, a graphite contact is arranged on the conductive slip ring 10, and the conductive slip ring 10 is connected with the controllable power supply 11 through the graphite contact and a wire; the output shaft 12 is provided with a gear set, and the output shaft 12 is respectively connected with the input shaft 2 and the differential gear 19 through the gear set.
The gear set in this embodiment includes a fourth gear 13, a fifth gear 14, a sixth gear 15, and a seventh gear 16; the output shaft 12 is sequentially sleeved with a fourth gear 13, a fifth gear 14, a sixth gear 15 and a one-way clutch 17; the fourth gear 13 is in meshed connection with the first gear 3; the fifth gear 14 is in meshed connection with an external gear 18 on a differential 19; the sixth gear 15 is in meshed connection with the second gear 5; the one-way clutch 17 is provided with a seventh gear 16, and the seventh gear 16 is in meshed connection with the third gear 8. The one-way clutch is used in the invention, so that the seventh gear and the third gear can not rotate along with the gear when the gear is not shifted, friction loss and oil stirring loss of each part are reduced, and energy conservation and emission reduction are realized. When the number of teeth of the fourth gear/the number of teeth of the first gear=i1, the number of teeth of the sixth gear/the number of teeth of the second gear=i2, and the number of teeth of the seventh gear/the number of teeth of the third gear=i3, the relationship of i1, i2, and i3 is i1> i2> i3; the number of teeth of the seventh gear is the minimum value compared with the number of teeth of the third gear, so that the rotation speed of the third gear is lower than that of an input shaft on the driving motor, and because the magnetic conduction steel disc and the conductive aluminum disc are directly fixed on the input shaft, the rotation speeds of the magnetic conduction steel disc and the conductive aluminum disc are lower than that of a rotation speed block of the third gear, and a coil group on the third gear, the magnetic conduction steel disc and the conductive aluminum disc are differential, so that electromagnetic force is generated; the gears in this embodiment can all adopt cylindrical gears to perform their corresponding functions.
The power of the driving motor 1 is transmitted to a fourth gear 13 through a synchronizer 4 and a first gear 3 on the input shaft 2, the fourth gear 13 is transmitted to an output shaft 12, the power is transmitted to a fifth gear 14 through the output shaft 12, the power is transmitted to a differential gear 19 through the fifth gear 14 and an external gear on the differential gear 19, and the differential gear 19 is transmitted to wheels through two half shafts.
When the automobile needs to be shifted, the gear shifting is divided into two conditions of upshift and downshift:
When the vehicle speed rises to the level where upshifting is required, the drive motor 1 is switched from the torque control state to the constant power control state; the controllable power supply 11 supplies current, the current reaches the coil group 9 through the conductive slip ring 10, the magnetic field generated by the coil group 9 generates induced current in the conductive aluminum disc 7 after being guided by the magnetic conductive steel disc 6, and the induced current enables the third gear 8 to generate torque under the action of the magnetic field generated by the coil group 9; setting the current of the controllable power supply 11, so that the torque of the third gear 8 is the same as the torque of the driving motor 1, and the torque on the synchronizer 4 is zero, at the moment, controlling the shifting fork to enable the synchronizer 4 to be adjusted to a neutral gear, and controlling the controllable power supply 11 to enable the current to be increased, increasing the torque and reducing the rotating speed of the driving motor 1; when the rotating speed of the input shaft 2 is the same as that of the second gear 5, the shifting fork is controlled to enable the synchronizer 4 to be connected with the second gear 5, then the current of the controllable power supply 11 is reduced to zero, the driving motor 1 returns to a torque control state, and the upshifting action is completed;
When the vehicle speed is reduced to a level at which a downshift is required, the drive motor 1 is switched from the torque control state to the constant power control state; the controllable power supply 11 supplies current, the current reaches the coil group 9 through the conductive slip ring 10, the magnetic field generated by the coil group 9 generates induced current in the conductive aluminum disc 7 after being guided by the magnetic conductive steel disc 6, and the induced current enables the third gear 8 to generate torque under the action of the magnetic field generated by the coil group 9; setting the current of the controllable power supply 11, so that the torque of the third gear 8 is the same as the torque of the driving motor 1, and the torque on the synchronizer 4 is zero, at the moment, controlling the shifting fork to enable the synchronizer 4 to be adjusted to a neutral gear, and controlling the controllable power supply 11 to enable the current to be reduced, reducing the torque and increasing the rotating speed of the driving motor 1; when the rotation speed of the input shaft 2 is the same as that of the first gear 3, the shifting fork is controlled to enable the synchronizer 4 to be connected with the first gear 3, then the current of the controllable power supply 11 is reduced to zero, the driving motor 1 returns to a torque control state, and the gear-down action is completed. The embodiment realizes a two-gear electric drive system of the synchronizer 4 structure and realizes power interruption-free gear shifting.
In the embodiment, the electric drive system only works during gear shifting, except gear shifting, the electric drive system does not work, so that the energy consumption can be reduced, the service life of the electric drive system is prolonged, and the purposes of energy conservation and emission reduction are achieved; in this embodiment, the third gear 8 is sleeved on the input shaft 2, the conductive aluminum disc 7 is fixed on the input shaft 2, when the coil assembly 9 is energized, the torque on the conductive aluminum disc 7 can be transferred to the third gear 8 through electromagnetic force, when the coil assembly 9 is not energized, the third gear 8 is in a free state, and since the electric drive system is energized only when the coil assembly 9 is shifted, the third gear 8 moves when shifting gears; when the vehicle is reversed, although the coil assembly 9 is not electrified, the one-way clutch 17 drives the seventh gear 16 to move, and the seventh gear 16 is meshed with the third gear 8, so that the third gear 8 moves when the vehicle is reversed, and therefore, the third gear 8 and the mechanical connecting part thereof in the embodiment only move when the vehicle is shifted and reversed, namely, the third gear 8 and the mechanical connecting part thereof do not rotate along with the vehicle system except when the vehicle is shifted and reversed, thereby effectively reducing the energy consumption of the vehicle system.
The electric drive system in the embodiment realizes a two-gear electric drive system with a synchronizer structure, and realizes powerless interruption gear shifting by utilizing an electromagnetic power-assisted gear shifting system arranged on an input shaft in the electric drive system, so that the transition is stable, and the comfort of an automobile is improved; in addition, the electric drive system in the embodiment is simple in arrangement and convenient to operate, achieves the purposes of energy conservation and emission reduction, occupies little automobile space, and is favorable for market popularization and application.
As above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. An electric drive system based on an electromagnetic power-assisted gear shifting and synchronizer structure is characterized by comprising a driving motor, an input shaft, a synchronizer, a magnetic steel disc, a conductive aluminum disc, an output shaft and a differential mechanism; the power output shaft of the driving motor is fixedly connected with the input shaft in a coaxial way, a first gear and a second gear are arranged on the input shaft, and a synchronizer is arranged between the first gear and the second gear; a third gear is sleeved above the input shaft, a coil group and a conductive slip ring are fixed on the third gear, the coil group is arranged opposite to the conductive aluminum disc, the coil group is electrically connected with the conductive slip ring, and the conductive slip ring is connected with a controllable power supply; The output shaft is provided with a gear set, and the output shaft is respectively connected with an input shaft and a differential mechanism through the gear set; the power of the driving motor is transmitted to an output shaft and a gear set through an input shaft, the output shaft is transmitted to a differential mechanism through the gear set, and the differential mechanism is transmitted to wheels through two half shafts; when the automobile needs to be shifted, the gear shifting is divided into two conditions of upshift and downshift: when the vehicle speed is increased to the gear needing to be upshifted, the driving motor is switched from a torque control state to a constant power control state; the controllable power supply provides current, the current reaches the coil assembly through the conductive slip ring, the magnetic field generated by the coil assembly generates induced current in the conductive aluminum disc after being guided by the magnetic conductive steel disc, and the induced current enables the third gear to generate torque under the action of the magnetic field generated by the coil assembly; setting the current of the controllable power supply, enabling the torque of the third gear to be the same as the torque of the driving motor, enabling the torque on the synchronizer to be zero, enabling the synchronizer to be adjusted to a neutral gear at the moment, controlling the controllable power supply to increase the current, increasing the torque, and reducing the rotating speed of the driving motor; when the rotation speed of the input shaft is the same as that of the second gear, the synchronizer is connected with the second gear, then the current of the controllable power supply is reduced to zero, the driving motor returns to a torque control state, and the upshift action is completed; when the vehicle speed is reduced to the gear needing to be shifted down, the driving motor is switched from a torque control state to a constant power control state; the controllable power supply provides current, the current reaches the coil assembly through the conductive slip ring, the magnetic field generated by the coil assembly generates induced current in the conductive aluminum disc after being guided by the magnetic conductive steel disc, and the induced current enables the third gear to generate torque under the action of the magnetic field generated by the coil assembly; Setting the current of the controllable power supply, enabling the torque of the third gear to be the same as the torque of the driving motor, enabling the torque on the synchronizer to be zero, enabling the synchronizer to be adjusted to a neutral gear at the moment, controlling the controllable power supply to enable the current to be reduced, enabling the torque to be reduced, and enabling the rotation speed of the driving motor to be increased; when the rotation speed of the input shaft is the same as that of the first gear, the synchronizer is connected with the first gear, then the current of the controllable power supply is reduced to zero, the driving motor returns to a torque control state, and the gear reduction action is completed; the gear set comprises a fourth gear, a fifth gear, a sixth gear and a seventh gear; the output shaft is sequentially sleeved with a fourth gear, a fifth gear, a sixth gear and a one-way clutch; the fourth gear is in meshed connection with the first gear; the fifth gear is in meshed connection with an external gear on the differential mechanism; the sixth gear is in meshed connection with the second gear; a seventh gear is arranged on the one-way clutch and is in meshed connection with the third gear; the coils of the coil groups are connected in series and then provided with lead-out ends, and the coil groups are connected with copper rings on the conductive slip rings through the lead-out ends and wires; the conductive slip ring is provided with a graphite contact, and is connected with a controllable power supply through the graphite contact and a wire.
2. An electro-drive system as claimed in claim 1, wherein the relationship of i1, i2 and i3 is i1> i2> i3 when the number of teeth of the fourth gear/the number of teeth of the first gear = i1, the number of teeth of the sixth gear/the number of teeth of the second gear = i2, and the number of teeth of the seventh gear/the number of teeth of the third gear = i3.
3. The electric drive system of claim 1, wherein the synchronizer is connected or disconnected from either of the first gear and the second gear, the synchronizer being mounted on the input shaft by a sliding sleeve.
4. The electro-drive system of claim 1, wherein the coil assembly is not in contact with a conductive aluminum disc.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011060899.8A CN112081914B (en) | 2020-09-30 | 2020-09-30 | Electric drive system based on electromagnetic power-assisted gear shifting and synchronizer structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011060899.8A CN112081914B (en) | 2020-09-30 | 2020-09-30 | Electric drive system based on electromagnetic power-assisted gear shifting and synchronizer structure |
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| CN112081914A CN112081914A (en) | 2020-12-15 |
| CN112081914B true CN112081914B (en) | 2024-07-02 |
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| CN113090728A (en) * | 2021-04-23 | 2021-07-09 | 杨升 | Two-gear gearbox with speed change compensation for electric automobile |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212389741U (en) * | 2020-09-30 | 2021-01-22 | 坤泰车辆系统（常州）有限公司 | Electric drive system based on electromagnetic power-assisted gear shifting and synchronizer structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4884667A (en) * | 1987-07-22 | 1989-12-05 | Isuzu Motors Ltd. | Automatic change gear control means |
| US5522777A (en) * | 1994-05-05 | 1996-06-04 | Dana Corporation | Electronic transfer case shifting apparatus |
| CN103174815B (en) * | 2013-03-28 | 2015-09-16 | 合肥工业大学 | The double-clutch automatic gearbox of band reverse gear used for electric vehicle and parking locking mechanism |
| CN209164501U (en) * | 2018-11-21 | 2019-07-26 | 重庆市艾莫特汽车部件有限公司 | Electronic automobile-used two-gear automatic speed changing case |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212389741U (en) * | 2020-09-30 | 2021-01-22 | 坤泰车辆系统（常州）有限公司 | Electric drive system based on electromagnetic power-assisted gear shifting and synchronizer structure |
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