CN114382851A - Multi-gear power assembly structure for electric vehicle and gear shifting method - Google Patents
Multi-gear power assembly structure for electric vehicle and gear shifting method Download PDFInfo
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- CN114382851A CN114382851A CN202111482158.3A CN202111482158A CN114382851A CN 114382851 A CN114382851 A CN 114382851A CN 202111482158 A CN202111482158 A CN 202111482158A CN 114382851 A CN114382851 A CN 114382851A
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- 230000009347 mechanical transmission Effects 0.000 abstract description 2
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- 230000003247 decreasing effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
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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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/065—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with a plurality of driving or driven shafts
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/001—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion convertible for varying the gear-ratio, e.g. for selecting one of several shafts as the input shaft
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/006—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion power being selectively transmitted by either one of the parallel flow paths
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/083—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with radially acting and axially controlled clutching members, e.g. sliding keys
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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
- F16H61/04—Smoothing ratio shift
- F16H2061/0425—Bridging torque interruption
- F16H2061/0433—Bridging torque interruption by torque supply with an electric motor
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/006—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising eight forward speeds
Abstract
The invention provides a multi-gear power assembly structure for an electric vehicle and a gear shifting method, solves the problem of power interruption in the gear shifting process of an AMT (automated mechanical transmission), improves the parking problem after gear shifting failure on an AMT slope, and improves the gear shifting smoothness. The gear shifting device comprises a main motor, an auxiliary motor and a gearbox, wherein the gearbox comprises a front auxiliary box and a main box, and is provided with 9 gear modes which comprise a neutral gear mode, a gear mode 1, a gear mode 2, a gear mode 3, a gear mode 4, a gear mode 5, a gear mode 6, a gear mode 7 and a gear mode 8; the 9 gear modes are switched by matching and combining the main box output shaft, the front auxiliary box intermediate shaft and gears arranged on the main box intermediate shaft.
Description
Technical Field
The invention relates to the technical field of electric vehicle driving systems, in particular to a multi-gear power assembly structure for an electric vehicle and a gear shifting method.
Background
At present pure electronic commercial car power structure is mostly in the traditional fuel vehicle power form with the engine trade the motor to select for use the automatic gearshift mechanical transmission (AMT) of few gear, but the motor is as the power supply, can bring power interruption when switching the gear, and present electric motor car power structural configuration can only satisfy the operation scene that the slope is little, the road conditions is better. But to the higher operating mode of AMT reliability and travelling comfort requirement of shifting, can't realize the power of shifting and not interrupt, the problem of stable shifting.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a multi-gear power assembly structure for an electric vehicle and a gear shifting method, which solve the problem of power interruption in the gear shifting process of an AMT, improve the parking problem after gear shifting failure on an AMT slope and improve the gear shifting smoothness.
In order to achieve the purpose, the invention provides the following technical scheme:
a multi-gear power assembly structure for an electric vehicle comprises a main motor, an auxiliary motor and a gearbox, wherein the gearbox comprises a front auxiliary box and a main box, and is provided with 9 gear modes comprising a neutral gear mode, a gear mode 1, a gear mode 2, a gear mode 3, a gear mode 4, a gear mode 5, a gear mode 6, a gear mode 7 and a gear mode 8;
the output end of the main motor is sequentially provided with a main box input shaft, a front auxiliary box output shaft and a main box output shaft, the main box input shaft is provided with an input shaft constant-meshing wheel, the front auxiliary box output shaft is sequentially provided with a front auxiliary box 1-gear and a front auxiliary box 2-gear, the main box output shaft is sequentially provided with a main box constant-meshing gear, a main and auxiliary box switching combination gear, a main and auxiliary box switching spline gear, a main box output shaft 1-gear and a main box output shaft 2-gear, and a main and auxiliary box switching sliding sleeve is sleeved outside the main and auxiliary box switching spline gear;
a front auxiliary box intermediate shaft is arranged in the front auxiliary box, a front auxiliary box constant-meshing wheel, a front auxiliary box intermediate shaft 1-gear, a front auxiliary box 1-gear combination gear, a front auxiliary box spline tooth, a front auxiliary box 2-gear combination gear and a front auxiliary box 2-gear are sequentially arranged on the front auxiliary box intermediate shaft, and a front auxiliary box sliding sleeve is sleeved outside the front auxiliary box spline tooth;
the main box is internally provided with a main box intermediate shaft, the output end of the auxiliary motor is connected with the main box intermediate shaft, and the main box intermediate shaft is sequentially provided with a main box intermediate shaft constant meshing wheel, a main box intermediate shaft constant meshing combined gear, a main box intermediate shaft first spline tooth, a main box intermediate shaft 1-gear, a main box intermediate shaft 1-gear combined gear, a main box intermediate shaft second spline tooth, a main box intermediate shaft 2-gear combined gear and a main box intermediate shaft 2-gear, wherein the main box intermediate shaft first spline tooth is sleeved with a main box intermediate shaft first sliding sleeve, and the main box intermediate shaft second spline tooth is sleeved with a main box intermediate shaft second sliding sleeve;
the 9 gear modes are switched by matching and combining the main box output shaft, the front auxiliary box intermediate shaft and gears arranged on the main box intermediate shaft.
Preferably, when the gearbox is in a neutral mode, the main motor and the auxiliary motor do not have power output, the first sliding sleeve of the main box intermediate shaft and the switching sliding sleeve of the main box intermediate shaft are both in a neutral position, and the front auxiliary box output shaft, the main box intermediate shaft and the main box output shaft are all disconnected.
Preferably, when the gear mode is 1 or 2, the power of the main motor and the auxiliary motor is output, the first spline teeth of the main box intermediate shaft are combined with the main box constant-gear through the first sliding sleeve of the main box intermediate shaft, and the second spline teeth of the main box intermediate shaft are combined with the 2-gear of the main box output shaft through the second sliding sleeve of the main box intermediate shaft;
the spline teeth of the front auxiliary box are combined with the 1-gear of the front auxiliary box or the 2-gear of the front auxiliary box through the sliding sleeve of the front auxiliary box.
Preferably, when the gear mode is in a gear mode 3 or a gear mode 4, the main motor and the auxiliary motor output power, the spline teeth of the front auxiliary box are combined with the gear of the front auxiliary box 2 through the sliding sleeve of the front auxiliary box, and the switching spline teeth of the main auxiliary box are combined with the switching combination teeth of the main auxiliary box through the switching sliding sleeve of the main auxiliary box;
and the second spline teeth of the main box intermediate shaft are combined with the 1-gear of the main box output shaft or the 2-gear of the main box output shaft through the second sliding sleeve of the main box intermediate shaft.
Preferably, when the gear mode is 5 or 6, the main motor and the auxiliary motor output power, the spline teeth of the front auxiliary box are combined with the gear of the front auxiliary box 1 through the sliding sleeve of the front auxiliary box, and the switching spline teeth of the main auxiliary box are combined with the switching combination teeth of the main auxiliary box through the switching sliding sleeve of the main auxiliary box;
and the second spline teeth of the main box intermediate shaft are combined with the 1-gear of the main box output shaft or the 2-gear of the main box output shaft through the second sliding sleeve of the main box intermediate shaft.
Preferably, when the gear mode is 7 or 8, the main motor does not have power output, the auxiliary motor outputs power, the first sliding sleeve of the main box intermediate shaft and the switching sliding sleeve of the main and auxiliary boxes are both in an empty position, and the output shaft of the front auxiliary box is disconnected with the main box intermediate shaft and the main box output shaft;
and the second spline teeth of the main box intermediate shaft are combined with the 1-gear of the main box output shaft or the 2-gear of the main box output shaft through the second sliding sleeve of the main box intermediate shaft.
A multi-gear power assembly structure gear shifting method for an electric vehicle comprises the following switching processes,
in the neutral gear engaging process, the neutral gear mode is switched to the gear mode 1, the main motor engages the gear 1 through the front auxiliary box, the output shaft of the front auxiliary box outputs torque to the main box intermediate shaft, the auxiliary motor adjusts the rotating speed of the main box intermediate shaft, and the main box intermediate shaft is pushed to engage the main box 2 through the second sliding sleeve after the speed difference is adjusted to meet the requirement, so that the neutral gear engaging is completed;
the process of upshifting during running comprises the steps of sequentially switching from a gear mode 1 to a gear mode 8;
during the downshift process in driving, sequentially switching from the gear mode 8 to the gear mode 1;
the neutral gear shifting process comprises three shifting processes of shifting from gear mode 7 or 8 to neutral gear mode, shifting from gear mode 3, gear mode 4, gear mode 5 or gear mode 6 to neutral gear mode and shifting from gear mode 1 or 2 to neutral gear mode.
Preferably, the shift from gear mode 7 or gear mode 8 to neutral mode, including,
and resetting the torque of the auxiliary motor, and removing the second sliding sleeve of the intermediate shaft of the main box.
Preferably, the shift from gear mode 3, gear mode 4, gear mode 5 or gear mode 6 to neutral mode, including,
resetting the torque of the main motor, emptying the switching sliding sleeve of the main box and the auxiliary box, and emptying the sliding sleeve of the front auxiliary box;
and resetting the torque of the auxiliary motor, and removing the second sliding sleeve of the intermediate shaft of the main box.
Preferably, the shift from gear mode 1 or 2 to neutral mode, including,
resetting the torque of the main motor, removing a first sliding sleeve of a middle shaft of the main box, and removing a sliding sleeve of a front auxiliary box;
and resetting the torque of the auxiliary motor, and removing the second sliding sleeve of the intermediate shaft of the main box.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a multi-gear power assembly structure for an electric vehicle and a gear shifting method, wherein 1 main motor and 1 auxiliary motor are arranged, the main motor drives a group of gears through a main box input shaft to transmit torque and rotating speed to a front auxiliary box intermediate shaft, a front auxiliary box sliding sleeve on the front auxiliary box intermediate shaft can switch idle/1/2 gears, and when the front auxiliary box sliding sleeve is in a gear hanging state of 1/2, power can be output to a front auxiliary box output shaft; the power of the auxiliary motor is output to the main box intermediate shaft by 1 auxiliary motor, and three gears of idle gear/1/2 can be switched respectively through the first sliding sleeve of the main box intermediate shaft and the second sliding sleeve of the main box intermediate shaft, wherein when 1/2 gears are hung on the first sliding sleeve of the main box intermediate shaft and the second sliding sleeve of the main box intermediate shaft, the power of the auxiliary motor can be transmitted to 1/2 gears on the output shaft of the main box, so that the power of the auxiliary motor is output to the output shaft of the main box; when the constant-meshing combination teeth of the main box intermediate shaft are combined with the spline teeth of the main box intermediate shaft through the sliding sleeve, the power of the output shaft of the front auxiliary box can be transmitted to the main box intermediate shaft; after the main box and the auxiliary box are switched to combine the tooth and the main box and the auxiliary box are switched to spline teeth to be combined through splines, power of an output shaft of the front auxiliary box is directly transmitted to an output shaft of the main box, the gear shifting process with uninterrupted torque can be achieved, power output in different gear modes is achieved, the problem of power interruption in the gear shifting process of the AMT is solved, the parking problem after gear shifting failure on an AMT slope is improved, and gear shifting smoothness is improved.
Drawings
FIG. 1 is a schematic view of a powertrain configuration of the present invention;
FIG. 2 is a diagram of a neutral mode power transfer route of the present invention;
FIG. 3 is a power transmission route diagram of gear mode 1 of the present invention;
FIG. 4 is a power transmission route diagram of gear mode 2 of the present invention;
FIG. 5 is a shift mode 3 power transmission route diagram of the present invention;
FIG. 6 is a power transmission route diagram of gear mode 4 of the present invention;
FIG. 7 is a shift mode 5 power transmission route diagram of the present invention;
FIG. 8 is a shift mode 6 power transmission route diagram of the present invention;
FIG. 9 is a shift mode 7 power transmission route diagram of the present invention;
fig. 10 is a power transmission route map of shift mode 8 of the invention.
In the figure, 10, the main motor; 20. a main case input shaft; 30. an input shaft bearing; 40. an input shaft constant-meshing wheel; 50. a front bearing of the front auxiliary box; 60. front auxiliary box 1 gear; 70. a front sub-tank output shaft; 80. front auxiliary box 2-gear; 90. a front sub-box rear bearing; 100. a front bearing of a middle shaft of the front auxiliary box; 110. the front auxiliary box is normally engaged with the wheel; 120. a front auxiliary box intermediate shaft; 130. a front auxiliary box intermediate shaft 1-gear; 140. a front auxiliary box 1 gear is combined with a gear; 150. front auxiliary box spline teeth; 160. a front auxiliary box sliding sleeve; 170. a front auxiliary box 2 gear is combined with a gear; 180. a front auxiliary box intermediate shaft 2-gear; 190. a front auxiliary box intermediate shaft rear bearing;
200. a secondary motor; 210. a main box intermediate shaft front bearing; 220. a main box intermediate shaft normally-meshed wheel; 230. a main box intermediate shaft is normally meshed with a combined gear; 240. a main box intermediate shaft first spline tooth; 250. a main box intermediate shaft first sliding sleeve; 260. a main box intermediate shaft 1-gear; 270. a 1-gear combination gear of a main box intermediate shaft; 280. a main box intermediate shaft second sliding sleeve; 290. a second spline tooth of the main box intermediate shaft; 300. a 2-gear combination gear of a main box intermediate shaft; 310. a main box intermediate shaft 2-gear; 320. a main box intermediate shaft rear bearing; 330. a main box intermediate shaft;
340. a main box constant mesh gear; 350. a main box output shaft front bearing; 360. the main box and the auxiliary box are switched to combine teeth; 370. the main and auxiliary boxes switch sliding sleeves; 380. the main and auxiliary boxes switch spline teeth; 390. 1-gear of a main box output shaft; 400. a 2-gear of a main box output shaft; 410. an output shaft rear bearing; 420-main box output shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the multi-gear power assembly structure for the electric vehicle of the present invention comprises a main motor 10, an auxiliary motor 200 and a transmission case, wherein the transmission case comprises a front auxiliary case and a main case, and is provided with 9 gear modes including a neutral mode and a gear mode 1, a gear mode 2, a gear mode 3, a gear mode 4, a gear mode 5, a gear mode 6, a gear mode 7 and a gear mode 8;
the output end of the main motor 10 is sequentially provided with a main box input shaft 20, a front auxiliary box output shaft 70 and a main box output shaft 420, the main box input shaft 20 is provided with an input shaft bearing 30 and an input shaft constant-meshing wheel 40, two ends of the front auxiliary box output shaft 70 are respectively provided with a front auxiliary box front bearing 50 and a front auxiliary box rear bearing 90, a front auxiliary box 1-gear 60 and a front auxiliary box 2-gear 80 are sequentially arranged on the front auxiliary box input shaft, the main box output shaft 420 is provided with an output shaft rear bearing 410, and a main box constant-meshing gear 340, a main and auxiliary box switching combination gear 360, a main and auxiliary box switching spline 380, a main box output shaft 1-gear 390 and a main box output shaft 2-gear 400 are sequentially arranged on the front auxiliary box output shaft 70, wherein a main and auxiliary box switching sliding sleeve 370 is sleeved outside the main and auxiliary box switching spline 380;
a front auxiliary box middle shaft 120 is arranged in the front auxiliary box, a front auxiliary box middle shaft front bearing 100 and a front auxiliary box middle shaft rear bearing 190 are respectively arranged at two ends of the front auxiliary box middle shaft 120, and a front auxiliary box constant-meshing wheel 110, a front auxiliary box middle shaft 1-gear, a front auxiliary box 1-gear combination gear 140, a front auxiliary box spline tooth 150, a front auxiliary box 2-gear combination gear 170 and a front auxiliary box 2-gear 80 are sequentially arranged on the front auxiliary box middle shaft, wherein a front auxiliary box sliding sleeve 160 is sleeved outside the front auxiliary box spline tooth 150;
the main box is also provided with a main box middle shaft 330, the output end of the auxiliary motor 200 is connected with the main box middle shaft 330, the two ends of the main box middle shaft 330 are respectively provided with a main box middle shaft front bearing 210 and a main box middle shaft rear bearing 320, and a main box middle shaft constant-meshing gear 220, a main box middle shaft constant-meshing combined gear 230, a main box middle shaft first spline gear 240, a main box middle shaft 1-stage gear 260, a main box middle shaft 1-stage combined gear 270, a main box middle shaft second spline gear 290, a main box middle shaft 2-stage combined gear 300 and a main box middle shaft 2-stage gear 310 are sequentially arranged on the main box middle shaft front bearing and the main box middle shaft rear bearing, wherein the main box middle shaft first spline gear 240 is externally sleeved with a main box middle shaft first sliding sleeve 250, and the main box middle shaft second spline gear 290 is externally sleeved with a main box middle shaft second sliding sleeve 280.
The invention provides a multi-gear power assembly structure for an electric vehicle, which is characterized in that 1 main motor 10 and 1 auxiliary motor 200 are arranged, the main motor 10 drives a group of gears through a main box input shaft 20 to transmit torque and rotating speed to a front auxiliary box intermediate shaft 120, a front auxiliary box sliding sleeve 160 on the front auxiliary box intermediate shaft 120 can switch three gears of idle/1/2, wherein when the front auxiliary box sliding sleeve 160 is shifted to a gear 1/2, power can be output to a front auxiliary box output shaft 70; the power of 1 auxiliary motor 200 is output to a main box intermediate shaft 330, and three gears of idle gear/1/2 can be switched respectively through a main box intermediate shaft first sliding sleeve 250 and a main box intermediate shaft second sliding sleeve 280, wherein when the main box intermediate shaft first sliding sleeve 250 and the main box intermediate shaft second sliding sleeve 280 are shifted to 1/2 gears, the power of the auxiliary motor 200 can be transmitted to 1/2 gears on a main box output shaft 420, so that the power of the auxiliary motor 200 is output to the main box output shaft 420; when the main box intermediate shaft constant-meshing combination gear 230 is combined with the spline teeth of the main box intermediate shaft by the sliding sleeve, the power of the front auxiliary box output shaft 70 can be transmitted to the main box intermediate shaft 330; after the main and auxiliary box switching combination teeth 360 and the main and auxiliary box switching spline teeth 380 are combined through splines, the power of the front and auxiliary box output shaft 70 is directly transmitted to the main box output shaft 420, the gear shifting process with uninterrupted torque can be realized, the power output in different gear modes is realized, the problem of power interruption in the AMT gear shifting process is solved, the parking problem after gear shifting failure on an AMT slope is improved, and the gear shifting smoothness is improved.
In particular, the present invention provides 9 gear modes, the unpowered interrupted gear mode being as follows,
as shown in fig. 2, neutral mode: the main motor 10 and the auxiliary motor 200 do not work and do not have power output, the main box intermediate shaft first sliding sleeve 250 and the main and auxiliary box switching sliding sleeve 370 are both in an empty position, the front and auxiliary box output shafts 70 and 330 are disconnected, the front and auxiliary box output shafts 70 and 420 are disconnected, and the main box intermediate shaft 330 and the main box output shaft 420 are disconnected.
As shown in fig. 3, shift pattern 1: the main motor 10 and the auxiliary motor 200 output power, the main box intermediate shaft first spline teeth 240 are combined with the main box constant-gear 340 through the main box intermediate shaft first sliding sleeve 250, the main box intermediate shaft second spline teeth 290 are combined with the main box output shaft 2-gear 400 through the main box intermediate shaft second sliding sleeve 280, and the front auxiliary box spline teeth 150 are combined with the front auxiliary box 1-gear 60 through the front auxiliary box sliding sleeve 160;
the main motor 10 is in gear 1 through the front auxiliary box, and the front auxiliary box output shaft 70 outputs torque to the main box intermediate shaft 330; after the main motor 10 transmits torque to the main box intermediate shaft 330, the auxiliary motor 200 adjusts the rotating speed of the main box intermediate shaft 330, and pushes the main box intermediate shaft second sliding sleeve 280 to engage with the main box 2 gear after adjusting the speed difference to be proper, so that the power of the main motor 10 and the power of the auxiliary motor 200 are transmitted to the main box output shaft 420 at the same time.
As shown in fig. 4, shift pattern 2: the main motor 10 and the auxiliary motor 200 output power, the main box intermediate shaft first spline teeth 240 are combined with the main box constant-gear 340 through the main box intermediate shaft first sliding sleeve 250, the main box intermediate shaft second spline teeth 290 are combined with the main box output shaft 2-gear 400 through the main box intermediate shaft second sliding sleeve 280, and the front auxiliary box spline teeth 150 are combined with the front auxiliary box 2-gear 80 through the front auxiliary box sliding sleeve 160;
the auxiliary motor 200 is connected with the main box 2 gear through the main box intermediate shaft second sliding sleeve 280, and the auxiliary motor 200 outputs torque to the main box intermediate shaft 330 according to requirements; the main motor 10 is shifted to 2 through the front auxiliary box, the second spline teeth 290 of the main box intermediate shaft and the constant-meshing combined gear 230 of the main box intermediate shaft are combined through the sliding sleeve, and the main motor 10 and the auxiliary motor 200 simultaneously output torque to the main box output shaft 420.
As shown in fig. 5, shift pattern 3: the main motor 10 and the auxiliary motor 200 output power, the front and auxiliary box spline teeth 150 are combined with the front and auxiliary box 2-gear 80 through the front and auxiliary box sliding sleeves 160, the main and auxiliary box switching spline teeth 380 are combined with the main and auxiliary box switching combination teeth 360 through the main and auxiliary box switching sliding sleeves 370, and the main box intermediate shaft second spline teeth 290 are combined with the main box output shaft 2-gear 400 through the main box intermediate shaft second sliding sleeve 280.
The auxiliary motor 200 is connected with the main box 2 gear through the main box intermediate shaft second sliding sleeve 280, and the auxiliary motor 200 outputs torque to the main box intermediate shaft 330 according to requirements; the main motor 10 is engaged with the gear 2 through the front and auxiliary boxes, the front and auxiliary box switching combination teeth are combined with the main and auxiliary box switching spline teeth 380 through the sliding sleeves, and the power of the front and auxiliary box output shaft 70 is directly transmitted to the main box output shaft 420, so that the main motor 10 and the auxiliary motor 200 can simultaneously output torque to the main box output shaft 420.
As shown in fig. 6, shift pattern 4: the main motor 10 and the auxiliary motor 200 output power, the front and auxiliary box spline teeth 150 are combined with the front and auxiliary box 2-gear 80 through the front and auxiliary box sliding sleeves 160, the main and auxiliary box switching spline teeth 380 are combined with the main and auxiliary box switching combination teeth 360 through the main and auxiliary box switching sliding sleeves 370, and the main box intermediate shaft second spline teeth 290 are combined with the main box output shaft 1-gear 390 through the main box intermediate shaft second sliding sleeve 280.
The main motor 10 is shifted by 2 through the front and auxiliary boxes, the front and auxiliary box switching combination teeth are combined with the main and auxiliary box switching spline teeth 380 through the sliding sleeves, and the power of the front and auxiliary box output shaft 70 is directly transmitted to the main box output shaft 420; the auxiliary motor 200 is connected with the main box 1 gear through the main box intermediate shaft second sliding sleeve 280, and the auxiliary motor 200 outputs torque to the main box intermediate shaft 330 according to requirements; the main motor 10 and the auxiliary motor 200 can output torque to the main box output shaft 420 at the same time.
As shown in fig. 7, shift pattern 5: the power of the main motor 10 and the auxiliary motor 200 is output, the front and auxiliary box spline teeth 150 are combined with the front and auxiliary box 1-gear 60 through the front and auxiliary box sliding sleeves 160, and the main and auxiliary box switching spline teeth 380 are combined with the main box constant-gear 340 through the main and auxiliary box switching sliding sleeves 370; the main case countershaft second splined teeth 290 are coupled to the main case output shaft 1 gear 390 via the main case countershaft second slip sleeve 280.
The auxiliary motor 200 is connected with the main box 1 gear through the main box intermediate shaft second sliding sleeve 280, and the auxiliary motor 200 outputs torque to the main box intermediate shaft 330 according to requirements; the main motor 10 is shifted by 1 gear through the front and auxiliary box, the front and auxiliary box switching combination teeth are combined with the main and auxiliary box switching spline teeth 380 through the sliding sleeve, the power of the front and auxiliary box output shaft 70 is directly transmitted to the main box output shaft 420, and the main motor 10 and the auxiliary motor 200 can simultaneously output torque to the main box output shaft 420.
As shown in fig. 8, shift pattern 6: the power of the main motor 10 and the auxiliary motor 200 is output, the front and auxiliary box spline teeth 150 are combined with the front and auxiliary box 1-gear 60 through the front and auxiliary box sliding sleeves 160, and the main and auxiliary box switching spline teeth 380 are combined with the main box constant-gear 340 through the main and auxiliary box switching sliding sleeves 370; the main case layshaft second spline teeth 290 are coupled to the main case layshaft 2 speed gear 400 via the main case layshaft second runner 280.
The auxiliary motor 200 is connected with the main box 2 gear through the main box intermediate shaft second sliding sleeve 280, and the auxiliary motor 200 outputs torque to the main box intermediate shaft 330 according to requirements; the main motor 10 is shifted by 1 gear through the front and auxiliary box, the front and auxiliary box switching combination teeth are combined with the main and auxiliary box switching spline teeth 380 through the sliding sleeve, the power of the front and auxiliary box output shaft 70 is directly transmitted to the main box output shaft 420, and the main motor 10 and the auxiliary motor 200 can simultaneously output torque to the main box output shaft 420.
As shown in fig. 9, shift pattern 7: the main motor 10 does not have power output, the auxiliary motor 200 does power output, the main box intermediate shaft first sliding sleeve 250 and the main and auxiliary box switching sliding sleeve 370 are both in an empty position, and the front and auxiliary box output shafts 70 are disconnected with the main box intermediate shaft 330 and the main box output shaft 420; the main case countershaft second splined teeth 290 are coupled to the main case output shaft 1 gear 390 via the main case countershaft second slip sleeve 280.
The auxiliary motor 200 is connected with the main box 1 gear through the main box intermediate shaft second sliding sleeve 280, and the auxiliary motor 200 outputs torque to the main box intermediate shaft 330 according to requirements; the main motor 10 is not operating, the main tank jackshaft first sliding sleeve 250 and the main and auxiliary tank switching sliding sleeve 370 are both in an empty position, the front auxiliary tank output shaft 70 is disconnected from the main tank jackshaft 330, and the front auxiliary tank output shaft 70 is disconnected from the main tank output shaft 420.
As shown in fig. 10, shift pattern 8: the main motor 10 does not have power output, the auxiliary motor 200 does power output, the main box intermediate shaft first sliding sleeve 250 and the main and auxiliary box switching sliding sleeve 370 are both in an empty position, and the front and auxiliary box output shafts 70 are disconnected with the main box intermediate shaft 330 and the main box output shaft 420; the main case layshaft second spline teeth 290 are coupled to the main case layshaft 2 speed gear 400 via the main case layshaft second runner 280.
The auxiliary motor 200 is connected with the main box 2 gear through the main box intermediate shaft second sliding sleeve 280, and the auxiliary motor 200 outputs torque to the main box intermediate shaft 330 according to requirements; the main motor 10 is not operating, the main tank jackshaft first sliding sleeve 250 and the main and auxiliary tank switching sliding sleeve 370 are both in an empty position, the front auxiliary tank output shaft 70 is disconnected from the main tank jackshaft 330, and the front auxiliary tank output shaft 70 is disconnected from the main tank output shaft 420.
The invention provides a method for realizing unpowered interrupted gear shifting of a multi-gear power assembly structure for an electric vehicle, which specifically comprises the following switching processes,
neutral gear engagement process
Neutral mode → gear mode 1: the main motor 10 is in gear 1 through the front auxiliary box, and the front auxiliary box output shaft 70 outputs torque to the main box intermediate shaft 330; after the main motor 10 transmits torque to the main box intermediate shaft 330, the auxiliary motor 200 adjusts the rotating speed of the main box intermediate shaft 330, and pushes the main box intermediate shaft second sliding sleeve 280 to engage with the main box 2 gear after adjusting the speed difference to be proper, so that the power of the main motor 10 and the power of the auxiliary motor 200 are transmitted to the main box output shaft 420 at the same time.
In-driving upshift process
Gear mode 1 → gear mode 2:
the torque of the main motor 10 is reset, the front auxiliary box sliding sleeve 160 is pulled to the neutral position from the 1 gear of the front auxiliary box intermediate shaft, the rotating speed of the main motor 10 is adjusted, and after the rotating speed of the front auxiliary box intermediate shaft 120 is close to the rotating speed of the front auxiliary box output shaft 70, the front auxiliary box sliding sleeve 160 is pulled to the 2 gear position of the front auxiliary box intermediate shaft. The sub-motor 200 outputs torque according to the demand.
Gear mode 2 → gear mode 3: the auxiliary motor 200 outputs torque according to the requirement, the torque of the main motor 10 is cleared, the first sliding sleeve 250 of the main box intermediate shaft is in the empty position, the rotating speed of the main motor 10 is adjusted, and after the rotating speed of the front auxiliary box output shaft 70 is close to the rotating speed of the main box output shaft 420, the main and auxiliary box switching sliding sleeve 370 is hung on the main and auxiliary box switching combination teeth 360, namely the power of the front auxiliary box output shaft 70 is directly transmitted to the main box output shaft 420.
Gear mode 3 → gear mode 4: the main motor 10 outputs torque according to the requirement, the torque of the auxiliary motor 200 is reset, and the second sliding sleeve 280 of the main box intermediate shaft is hung into the 3301 gear combination teeth of the main box intermediate shaft.
Gear mode 5 → gear mode 6: the main motor 10 outputs torque according to the requirement, the torque of the auxiliary motor 200 is reset, and the second sliding sleeve 280 of the intermediate shaft of the main box is hung in the 2-gear combined tooth of the intermediate shaft of the main box.
Shift position pattern 6 → shift position pattern 7: the main motor 10 outputs torque according to requirements, the torque of the auxiliary motor 200 is reset, the main box intermediate shaft second sliding sleeve 280 is hung in the main box intermediate shaft 3301 gear combination teeth, the torque of the auxiliary motor 200 is increased, the torque of the main motor 10 is decreased, the output torque of the main box is guaranteed to be approximately constant, and when the torque of the main motor 10 is decreased to zero, the main box and the auxiliary box switch the sliding sleeve 370 to be in an empty position.
Gear pattern 7 → gear pattern 8: the rotation speed of the main motor 10 is adjusted to enable the rotation speed of the front auxiliary box output shaft 70 to be close to the rotation speed of the main box output shaft 420, the main and auxiliary box switching sliding sleeve 370 is hung in the front auxiliary box combination teeth, the torque of the main motor 10 is increased, the torque of the auxiliary motor 200 is decreased to ensure that the torque of the main box output shaft 420 is approximately constant, when the torque of the auxiliary motor 200 is zero, the main box intermediate shaft second sliding sleeve 280 is hung in the main box intermediate shaft 2-gear combination teeth, the torque of the auxiliary motor 200 is increased, the torque of the main motor 10 is decreased, the torque of the main box output shaft 420 is ensured to be approximately constant, and when the torque of the main motor 10 is decreased to be zero, the main and auxiliary box switching sliding sleeve 370 is hung in the empty position.
In-drive downshift process
Gear pattern 8 → gear pattern 7: the rotation speed of the main motor 10 is adjusted to enable the rotation speed of the front auxiliary box output shaft 70 to be close to the rotation speed of the main box output shaft 420, the main and auxiliary box switching sliding sleeve 370 is hung in the front auxiliary box combination teeth, the torque of the main motor 10 is increased, the torque of the auxiliary motor 200 is decreased, the torque of the main box output shaft 420 is enabled to be approximately constant, when the torque of the auxiliary motor 200 is cleared to be zero, the main box intermediate shaft second sliding sleeve 280 is hung in the main box intermediate shaft 3301 gear combination teeth, the torque of the auxiliary motor 200 is increased, the torque of the main motor 10 is decreased, the torque of the main box output shaft 420 is enabled to be approximately constant, and when the torque of the main motor 10 is decreased to be zero, the main and auxiliary box switching sliding sleeve 370 is hung in the empty position.
Shift position pattern 7 → shift position pattern 6: the main motor 10 adjusts the rotation speed of the front auxiliary box output shaft 70 to enable the rotation speed of the front auxiliary box output shaft 70 to be approximate to the rotation speed of the main box output shaft 420, the main and auxiliary box switching sliding sleeve 370 is hung in the main and auxiliary box switching combination teeth 360, the main motor 10 raises the torque, the auxiliary motor 200 lowers the torque to ensure that the total torque of the main box output shaft 420 is approximately unchanged, after the torque of the main box intermediate shaft 330 is cleared, the main box intermediate shaft second sliding sleeve 280 is in a zero position, the auxiliary motor 200 adjusts the rotation speed of the main box intermediate shaft 330 to enable the rotation speed of the main box intermediate shaft 330 to be approximate to the rotation speed of the main box output shaft 420, and the main box intermediate shaft second sliding sleeve 280 is hung in the gear position of the main box intermediate shaft 3302.
Shift position mode 6 → shift position mode 5: the main motor 10 outputs torque according to the requirement, the torque of the auxiliary motor 200 is cleared, the second sliding sleeve 280 of the main box intermediate shaft is in a zero position, the auxiliary motor 200 adjusts the rotating speed of the main box intermediate shaft 330 to be close to the rotating speed of the main box output shaft 420, and the second sliding sleeve 280 of the main box intermediate shaft is hung in a 1-gear position of the main box.
Gear mode 5 → gear mode 4: the auxiliary motor 200 outputs torque according to the requirement, the torque of the main motor 10 is reset, the sliding sleeve of the front auxiliary box intermediate shaft 120 is removed, the main motor 10 adjusts the rotating speed of the front auxiliary box intermediate shaft 120 to be approximate to the rotating speed of the front auxiliary box output shaft 70, and the sliding sleeve of the front auxiliary box intermediate shaft 120 is connected to the front auxiliary box intermediate shaft 2.
Gear mode 3 → gear mode 2: the auxiliary motor 200 outputs torque according to the requirement, the torque of the main motor 10 is cleared, the main and auxiliary box switching sliding sleeve 370 is removed, the main motor 10 adjusts the rotating speed, so that the rotating speed of the front and auxiliary box output shaft 70 is approximate to the rotating speed of the main box intermediate shaft 330, and the main box intermediate shaft first sliding sleeve 250 is hung on the main box intermediate shaft normally meshed combined gear 230.
Gear mode 2 → gear mode 1: the auxiliary motor 200 outputs torque according to the requirement, the torque of the main motor 10 is reset, the sliding sleeve of the front auxiliary box intermediate shaft 120 is removed, the rotating speed of the main motor 10 is adjusted, the rotating speed of the front auxiliary box intermediate shaft 120 is approximate to the rotating speed of an output shaft, and the sliding sleeve of the front auxiliary box intermediate shaft 120 is hung into a 1-gear of the front auxiliary box intermediate shaft.
Off-gear process
Gear pattern 7 and gear pattern 8 → neutral: the torque of the auxiliary motor 200 is reset, and the second sliding sleeve 280 of the intermediate shaft of the main box is removed.
Gear pattern 3, gear pattern 4, gear pattern 5, gear pattern 6 → neutral: the torque of the main motor 10 is reset, the main and auxiliary box switching sliding sleeve 370 is at an emptying position, and the front and auxiliary box middle shaft 120 is at an emptying position; the torque of the auxiliary motor 200 is reset, and the second sliding sleeve 280 of the intermediate shaft of the main box is removed.
Gear mode 1 and gear mode 2 → neutral mode: the torque of the main motor 10 is reset, the first sliding sleeve 250 of the main box intermediate shaft is at the position of removing the hollow, and the sliding sleeve 120 of the front auxiliary box intermediate shaft is at the position of removing the hollow; the torque of the auxiliary motor 200 is reset, and the second sliding sleeve 280 of the intermediate shaft of the main box is removed.
The gear shifting method of the power assembly structure can realize the functions of engaging a gear mode from a neutral gear, ascending and descending the gear and disengaging the gear from an on-gear to the neutral gear. The power interruption in the gear lifting and lowering process can solve the problem of power interruption in the AMT gear shifting process, the working condition of unpowered interruption in gear shifting on an AMT slope is met, and the gear shifting smoothness is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A multi-gear power assembly structure for an electric vehicle is characterized by comprising a main motor (10), an auxiliary motor (200) and a gearbox, wherein the gearbox comprises a front auxiliary box and a main box, and is provided with 9 gear modes comprising a neutral gear mode, a gear mode 1, a gear mode 2, a gear mode 3, a gear mode 4, a gear mode 5, a gear mode 6, a gear mode 7 and a gear mode 8;
the output end of a main motor (10) is sequentially provided with a main box input shaft (20), a front auxiliary box output shaft (70) and a main box output shaft (420), the main box input shaft (20) is provided with an input shaft constant-meshing wheel (40), the front auxiliary box output shaft (70) is sequentially provided with a front auxiliary box 1-gear (60) and a front auxiliary box 2-gear (80), the main box output shaft (420) is sequentially provided with a main box constant-meshing gear (340), main and auxiliary box switching combination teeth (360), main and auxiliary box switching spline teeth (380), a main box output shaft 1-gear (390) and a main box output shaft 2-gear (400), wherein a main and auxiliary box switching sliding sleeve (370) is sleeved outside the main and auxiliary box switching spline teeth (380);
a front auxiliary box intermediate shaft (120) is arranged in the front auxiliary box, a front auxiliary box constant-gear wheel (110), a front auxiliary box intermediate shaft (120) 1-gear, a front auxiliary box 1-gear combination gear (140), front auxiliary box spline teeth (150), a front auxiliary box 2-gear combination gear (170) and a front auxiliary box 2-gear (80) are sequentially arranged on the front auxiliary box intermediate shaft (120), and a front auxiliary box sliding sleeve (160) is sleeved outside the front auxiliary box spline teeth (150);
a main box intermediate shaft (330) is further arranged in the main box, the output end of an auxiliary motor (200) is connected with the main box intermediate shaft (330), a main box intermediate shaft constant-meshing gear (220), a main box intermediate shaft constant-meshing combined gear (230), a main box intermediate shaft first spline tooth (240), a main box intermediate shaft 1-gear (260), a main box intermediate shaft 1-gear combined gear (270), a main box intermediate shaft second spline tooth (290), a main box intermediate shaft 2-gear combined gear (300) and a main box intermediate shaft 2-gear (310) are sequentially arranged on the main box intermediate shaft, a main box intermediate shaft first sliding sleeve (250) is sleeved outside the main box intermediate shaft first spline tooth (240), and a main box intermediate shaft second sliding sleeve (280) is sleeved outside the main box intermediate shaft second spline tooth (290);
the 9 gear modes are switched through the matching and combination of gears arranged on the main box output shaft (420), the front auxiliary box intermediate shaft (120) and the main box intermediate shaft (330).
2. The multi-gear power assembly structure for the electric vehicle as claimed in claim 1, wherein in the neutral mode, the main motor (10) and the auxiliary motor (200) do not have power output, the main box jackshaft first sliding sleeve (250) and the main and auxiliary box switching sliding sleeve (370) are both in the neutral position, and the front auxiliary box output shaft (70), the main box jackshaft (330) and the main box output shaft (420) are disconnected.
3. The multi-gear power assembly structure for the electric vehicle according to claim 1, wherein in gear mode 1 or gear mode 2, the main motor (10) and the auxiliary motor (200) output power, the main box countershaft first spline teeth (240) are combined with the main box constant-meshed gear (340) through the main box countershaft first sliding sleeve (250), and the main box countershaft second spline teeth (290) are combined with the main box output shaft 2-gear (400) through the main box countershaft second sliding sleeve (280);
the front auxiliary box spline teeth (150) are combined with a front auxiliary box 1-gear (60) or a front auxiliary box 2-gear (80) through a front auxiliary box sliding sleeve (160).
4. The multi-gear power assembly structure for the electric vehicle according to claim 1, wherein in gear mode 3 or gear mode 4, the power of the main motor (10) and the auxiliary motor (200) is output, the front and auxiliary box spline teeth (150) are combined with the front and auxiliary box 2-gear (80) through the front and auxiliary box sliding sleeve (160), and the main and auxiliary box switching spline teeth (380) are combined with the main and auxiliary box switching combination teeth (360) through the main and auxiliary box switching sliding sleeve (370);
and the second spline teeth (290) of the main box intermediate shaft are combined with the 1 st gear (390) of the main box output shaft or the 2 nd gear (400) of the main box output shaft through the second sliding sleeve (280) of the main box intermediate shaft.
5. The multi-gear power assembly structure for the electric vehicle according to claim 1, wherein in gear mode 5 or gear mode 6, the power of the main motor (10) and the auxiliary motor (200) is output, the front and auxiliary box spline teeth (150) are combined with the front and auxiliary box 1-gear (60) through the front and auxiliary box sliding sleeve (160), and the main and auxiliary box switching spline teeth (380) are combined with the main and auxiliary box switching combination teeth (360) through the main and auxiliary box switching sliding sleeve (370);
and the second spline teeth (290) of the main box intermediate shaft are combined with the 1 st gear (390) of the main box output shaft or the 2 nd gear (400) of the main box output shaft through the second sliding sleeve (280) of the main box intermediate shaft.
6. The multi-gear power assembly structure for the electric vehicle as claimed in claim 1, wherein in gear mode 7 or gear mode 8, the main motor (10) has no power output, the auxiliary motor (200) has power output, the main box intermediate shaft first sliding sleeve (250) and the main and auxiliary box switching sliding sleeve (370) are both in the empty position, and the front and auxiliary box output shafts (70) are disconnected from the main box intermediate shaft (330) and the main box output shaft (420);
and the second spline teeth (290) of the main box intermediate shaft are combined with the 1 st gear (390) of the main box output shaft or the 2 nd gear (400) of the main box output shaft through the second sliding sleeve (280) of the main box intermediate shaft.
7. A gear shifting method of a multi-gear power assembly structure for an electric vehicle is characterized in that based on the multi-gear power assembly structure of any one of claims 1-6, the gear shifting method comprises the following steps of gear shifting,
in the neutral gear engaging process, the neutral gear mode is switched to the gear mode 1, the main motor (10) engages the gear 1 through the front auxiliary box, the auxiliary box output shaft (70) outputs torque to the main box intermediate shaft (330), the auxiliary motor (200) adjusts the rotating speed of the main box intermediate shaft (330), and pushes the second sliding sleeve (280) of the main box intermediate shaft to engage the main box 2 after adjusting the speed difference to meet the requirement, so that the neutral gear engaging is completed;
the process of upshifting during running comprises the steps of sequentially switching from a gear mode 1 to a gear mode 8;
during the downshift process in driving, sequentially switching from the gear mode 8 to the gear mode 1;
the neutral gear shifting process comprises three shifting processes of shifting from gear mode 7 or 8 to neutral gear mode, shifting from gear mode 3, gear mode 4, gear mode 5 or gear mode 6 to neutral gear mode and shifting from gear mode 1 or 2 to neutral gear mode.
8. The method of claim 7, wherein the shift from gear mode 7 or gear mode 8 to neutral mode comprises,
and (3) resetting the torque of the auxiliary motor (200), and taking off the second sliding sleeve (280) of the intermediate shaft of the main box.
9. The method of claim 7, wherein the shift from gear mode 3, gear mode 4, gear mode 5 or gear mode 6 to neutral mode comprises,
the torque of the main motor (10) is reset, the main and auxiliary box switching sliding sleeve (370) is removed, and the front and auxiliary box sliding sleeve (160) is removed;
and (3) resetting the torque of the auxiliary motor (200), and taking off the second sliding sleeve (280) of the intermediate shaft of the main box.
10. The method of claim 7, wherein the shift from gear mode 1 or 2 to neutral mode comprises,
the torque of the main motor (10) is reset, the first sliding sleeve (250) of the middle shaft of the main box is removed, and the sliding sleeve (160) of the front auxiliary box is removed;
and (3) resetting the torque of the auxiliary motor (200), and taking off the second sliding sleeve (280) of the intermediate shaft of the main box.
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