CN203331824U - Two-gear power transmission system of integrated planetary gear train of pure electric vehicle - Google Patents

Two-gear power transmission system of integrated planetary gear train of pure electric vehicle Download PDF

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Publication number
CN203331824U
CN203331824U CN2013204271639U CN201320427163U CN203331824U CN 203331824 U CN203331824 U CN 203331824U CN 2013204271639 U CN2013204271639 U CN 2013204271639U CN 201320427163 U CN201320427163 U CN 201320427163U CN 203331824 U CN203331824 U CN 203331824U
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gear
stage
order
axle
pinion carrier
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CN2013204271639U
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尹安东
赵韩
江昊
龚来智
孙骏
王荣贵
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Hefei University of Technology
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Hefei University of Technology
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Abstract

The utility model relates to a two-gear power transmission system of an integrated planetary gear train of a pure electric vehicle. The two-gear power transmission system comprises a drive motor, a two-gear planetary gear train speed changer, a gear shifting mechanism provided with a synchronizer, a differential mechanism, a left half shaft and a right half shaft, wherein the two-gear planetary gear train speed changer is composed of a first stage planetary gear train and a second stage planetary gear train in a series connection mode; the drive motor, the two-gear planetary gear train speed changer and the differential mechanism are integrated; the axis of the drive motor, the axis of the two-gear planetary gear train speed changer and the axis of the differential mechanism are located in the same straight line; smooth switching between a low gear, a high gear and a neutral gear is realized through the gear shifting mechanism provided with the synchronizer. The two-gear power transmission system of the integrated planetary gear train of the pure electric vehicle is unique in design, compact in structure and high in transmission efficiency, facilitates the overall arrangement and the realization of light weight, and meets the requirements for overall power performance, economical efficiency and comfort, thereby being beneficial to industrialized popularization.

Description

A kind of two gear power drive systems of pure electric automobile integrated form planet circular system
Technical field
The utility model relates to a kind of power transmission system for electric vehicle, specifically relates to a kind of two gear power drive systems of pure electric automobile integrated form planet circular system, belongs to the electric powered motor transmission technique field.
Background technology
For the energy and the environmental issue that solve the world, the research and development of electronlmobil have become the focus of automobile industry development and research.Lack unified design arrangement in R&D process in view of pure electric vehicle power transmission system major part (drive motor, change-speed box and diff), cause that power transmission system structure is complicated, bulky, weight increases, system is disperseed, cost is higher, be unfavorable for its development and industrialization, by drive motor, change-speed box, diff integrated be the inevitable choice of pure electric automobile development.Electronlmobil integrated form power drive system adopts the parallel shafts export structure more at present, this structure realizes simple, technology maturation, but drive motor diff relative to change-speed box and semiaxis eccentric setting, bring very large difficulty to the layout design of power drive system.In addition, current pure electric automobile or employing fuel-engined vehicle automatic transmission with hydraulic torque converter, make the drive system structure complexity, complete vehicle quality increases, and has reduced energy utilization efficiency, or has adopted the retarder of single fixed speed ratio, make drive motor usually be operated in the low efficiency district, the car load continual mileage reduces, and is difficult to take into account the requirement of car load dynamic property and economy, still is not applicable to the integrated variable speed drive system of pure electric automobile.
Patent CN102616134A discloses a kind of pure electric automobile integrated driving device, and this device is integrated by driving, deceleration, box of tricks, has reduced volume, has improved space availability ratio.This device adopts the double planet wheel rows of mixing gear reduction of a gear fixed speed ratio, is difficult to take into account car load maximum speed and max. climb slope, and the requirement of dynamic property and economy.
Patent CN102555794A discloses a kind of planetary gear train variable speed driving system of electric automobile, comprises drive motor, power-transfer clutch, planet circular system speed-changing mechanism, diff, reducing gear transmission device and wheel.The main shaft of this system drive motor, planet circular system speed-changing mechanism, diff is positioned on the same straight line parallel with wheel axis, by clutch driving case, from the different fit forms of two clutch driven discs, realizes two gear speed changes.But this system planet circular system speed-changing mechanism separates with the reducing gear transmission device, and is the parallel shafts structure, and power transmission line is long, has increased the complexity of this body structure of drive system, and volume size is large.
Patent CN102259588A discloses integrated driving device for electric automobile, and this device is comprised of change-speed box, retarder, diff and shared aluminum alloy casing and gearshift, adopts synchro to complete shift transformation, does not need power-transfer clutch to make designs simplification.But its speed-changing mechanism is the parallel shafts structure, exists oad large, make troubles to the layout of car load.
Therefore, difference in view of drive motor characteristic and fuel engines characteristic, a kind of pure electric automobile integrated form two gear power drive systems need to be provided, make it in time according to the subjective wishes of vehicle condition, road conditions and chaufeur, carry out smooth-going gearshift, and can keep the work area that drive motor is high in efficiency, give full play to the advantage of electric automobile energy saving environmental protection.
The utility model content
The defect or the deficiency that for solving above-mentioned prior art, exist, the utility model provides a kind of two gear power drive systems of the pure electric automobile integrated form planet circular system that drive motor, two gear planet gear train speed changers and diff are become one.
The utility model is achieved through the following technical solutions:
Two gear power drive systems of a kind of pure electric automobile integrated form planet circular system of the present utility model comprise gearshift, diff, left half axle and the right axle shaft of drive motor, change-speed box, tape synchronizer, and the mouth of the output shaft of drive motor extends the electric machine casing outside; Diff comprises differential gear box, planet wheel spindle, diff satellite gear, left half axle gear, right axle shaft gear, be respectively equipped with two diff satellite gears by planet wheel spindle between left half axle gear and right axle shaft gear, the two ends of planet wheel spindle are located on differential gear box respectively.
Change-speed box of the present utility model is by first order planet circular system and second stage planet circular system two gear planet gear train speed changers in series, comprises the case of transmission of cylindrical tube.
The output shaft of described drive motor is hollow shaft, be fixed with first order sun wheel on the overhanging end of described output shaft, be provided with first order gear ring corresponding to first order sun wheel, described first order gear ring is located in an end of case of transmission, between first order sun wheel and first order gear ring, by first order pinion carrier, coordinates and is provided with three first order satellite gears; First order sun wheel, first order gear ring, first order pinion carrier and three first order satellite gears form first order planet circular system; Three first order satellite gears are positioned at an axial side of first order pinion carrier, the axial opposite side of first order pinion carrier is the first tubular axis, the first tubular axis of first order pinion carrier, as the output shaft of first order planet circular system, is provided with second stage sun wheel by spline fitted on the first tubular axis of first order pinion carrier; Be provided with second stage gear ring corresponding to second stage sun wheel; Coordinate and be provided with three second stage satellite gears by second stage pinion carrier between second stage sun wheel and second stage gear ring, second stage sun wheel, second stage gear ring, second stage pinion carrier and three second stage satellite gears form second stage planet circular system; First order planet circular system and second stage planet circular system two gear planet gear train speed changers in series; Three second stage satellite gears are positioned at an axial side of second stage pinion carrier, and the axial opposite side of second stage pinion carrier is the second tubular axis, the output shaft that the second tubular axis of second stage pinion carrier is second stage planet circular system; An axial side of described second stage gear ring is the 3rd tubular axis, and described the 3rd pipe sleeve is located on the second tubular axis of second stage pinion carrier, and the second tubular axis of second stage pinion carrier is through the 3rd tubular axis; First order planet circular system and second stage planet circular system all are positioned at case of transmission, one end of the case of transmission corresponding with first order gear ring is connecting the casing end face of drive motor, the other end of case of transmission is provided with end cap, and described the 3rd tubular axis and the second tubular axis all extend the end cap outside; First engages gear ring is located on the case of transmission end cap, second engages gear ring is set on the second tubular axis by spline fitted, the first synchro engaged between gear ring and the second joint gear ring is set on the 3rd tubular axis by spline fitted, described synchro is lock ring type inertia synchronizer, comprises baulk ring, sliding hub, slide block and splined hub; The 3rd tubular axis of second stage gear ring is connecting splined hub by spline fitted; Coordinate and be provided with selector fork with synchro; The second the second tubular axis that engages the second stage pinion carrier in the gear ring outside differential gear box by spline joint, be provided with left half axle and right axle shaft in differential gear box, left half axle is through the second tubular axis of second stage pinion carrier, the first tubular axis and the drive motor axle of first order pinion carrier, and be connected with the vehicle left side wheel, right axle shaft is connected with the vehicle right side wheels, and left half axle and right axle shaft are coaxial, left half axle gear is located on left half axle, and the right axle shaft gear is located on right axle shaft; The axis of the axis of the axis of the output shaft of drive motor, two gear planet gear train speed changers and the left half axle of diff and right axle shaft is on the same straight line.
Case of transmission middle part between first order planet circular system and second stage planet circular system radially is provided with the reinforcement gusset of ring-type, to support the drive disk assembly in change-speed box.
Useful technique effect of the present utility model is:
1. the utility model integrates drive motor, two gear planet gear train speed changer and difies, and drive motor, two gear planet gear train speed changers and diff three's axis is on the same straight line, the power drive system split with power part is compared, integrated level is high, drive path is short, volume is little and quality is light, and is conducive to design arrangement and the lightweight of car load;
2. the utility model adopts two gear planet circular system speed-changing mechanisms, realize the smooth-going switching of low gear, high gear and neutral by the gearshift of tape synchronizer, saved the main gear reducer structure in the orthodox car drive axle, compact conformation, quality are light, stability of rotation, compare with the electric automobile gear mechanism of a gear fixed speed ratio, can improve car load dynamic property, drive motor efficiency, electrokinetic cell life-span and extend the car load continual mileage.
The accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model low gear (I gear) view.
Fig. 3 is the utility model high gear (II gear) view.
Fig. 4 is the utility model neutral position state schematic diagram.
Sequence number in upper figure: 1. drive motor, 2. output shaft, 3. first order sun wheel, 4. first order pinion carrier, 5 .first order satellite gear, 6. first order gear ring, 7. second stage sun wheel, 8. second stage satellite gear, 9. second stage pinion carrier, 10. second stage gear ring, 11. first engage gear rings, 12. selector forks, 13. baulk ring, 14. sliding hubs, 15. slide blocks, 16. splined hub, 17. second engages gear ring, 18. differential gear boxs, 19. planet wheel spindles, 20. the diff satellite gear, 21. right axle shaft gears, 22. right axle shafts, 23. left half axle gear, 24. left half axles, 25. case of transmissiones.
The specific embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.
Embodiment
Referring to Fig. 1, a kind of two gear power drive systems of pure electric automobile integrated form planet circular system comprise gearshift, diff, left half axle 24 and the right axle shaft 22 of drive motor 1, two gear planet gear train speed changers, tape synchronizer.Diff comprises differential gear box 18, planet wheel spindle 19, diff satellite gear 20, left half axle gear 23, right axle shaft gear 21, be respectively equipped with two diff satellite gears 20 by planet wheel spindle 19 between left half axle gear 23 and right axle shaft gear 21, the two ends of planet wheel spindle 19 are located at respectively on differential gear box 18.
As seen from Figure 1, the output shaft 2 of drive motor 1 is hollow shaft, and the mouth of output shaft 2 extends the electric machine casing outside; Be installed with first order sun wheel 3 on the overhanging end of output shaft 2, be provided with first order gear ring 6 corresponding to first order sun wheel 3, first order gear ring 6 is located in the end of case of transmission 25 of cylindrical tube, between first order sun wheel 3 and first order gear ring 6, by first order pinion carrier 4, coordinates three first order satellite gears 5 are installed; First order sun wheel 3, first order gear ring 6, first order pinion carrier 4 and three first order satellite gears 5 form first order planet circular system.Three first order satellite gears 5 are positioned at an axial side of first order pinion carrier 4, and the axial opposite side of first order pinion carrier 4 is the first tubular axis; The first tubular axis of first order pinion carrier 4, as the output shaft of first order planet circular system, is equipped with second stage sun wheel 7 by spline fitted on the first tubular axis of first order pinion carrier 4; Be provided with second stage gear ring 10 corresponding to second stage sun wheel 7; Coordinate three second stage satellite gears 8 are installed by second stage pinion carrier 9 between second stage sun wheel 7 and second stage gear ring 10, second stage sun wheel 7, second stage gear ring 10, second stage pinion carrier 9 and three second stage satellite gears 8 form second stage planet circular system; First order planet circular system and second stage planet circular system two gear planet gear train speed changers in series.Three second stage satellite gears 8 are positioned at an axial side of second stage pinion carrier 9, and the axial opposite side of second stage pinion carrier 9 is the second tubular axis, and the second tubular axis of second stage pinion carrier 9 is as the output shaft of second stage planet circular system; An axial side of second stage gear ring 10 is the 3rd tubular axis, and the 3rd pipe sleeve is located on the second tubular axis of second stage pinion carrier 9, and the second tubular axis of second stage pinion carrier 9 is through the 3rd tubular axis; First order planet circular system and second stage planet circular system all are positioned at case of transmission 25, one end of the case of transmission 25 of first order gear ring 6 one sides is connecting the casing end face of drive motor 1, the other end of case of transmission 25 is equipped with end cap, and the 3rd tubular axis and the second tubular axis all extend the end cap outside; First engages gear ring 11 is located on case of transmission 25 end caps, second engages gear ring 17 is set on the second tubular axis by spline fitted, the first synchro engaged between gear ring 11 and the second joint gear ring 17 is set on the 3rd tubular axis by spline fitted, described synchro is lock ring type inertia synchronizer, comprise baulk ring 13, sliding hub 14, slide block 15 and splined hub 16, the 3rd tubular axis of second stage gear ring 10 is connecting splined hub 16 by spline fitted; Coordinate with synchro selector fork 12 is installed; The second the second tubular axis that engages the second stage pinion carrier 9 in gear ring 17 outsides differential gear box 18 by spline joint; Be provided with left half axle 24 and right axle shaft 22 in differential gear box 18, left half axle 24 is through the second tubular axis, the first tubular axis of first order pinion carrier 4 and the output shaft 2 of drive motor of second stage pinion carrier 9, and be connected with the vehicle left side wheel, right axle shaft 22 is connected with the vehicle right side wheels, and left half axle 24 and right axle shaft 22 are coaxial, left half axle gear 23 is installed on left half axle 24, and right axle shaft gear 21 is installed on right axle shaft 22; The axis of the axis of the axis of the output shaft 2 of drive motor 1, two gear planet gear train speed changers and the left half axle 24 of diff and right axle shaft 22 is on the same straight line.
Case of transmission 25 middle parts between first order planet circular system and second stage planet circular system radially are provided with the reinforcement gusset of ring-type, to support the drive disk assembly in change-speed box.
Principle of work of the present utility model is as follows:
The actual development type pure electric automobile two gear power drive systems of take are example, two gear power drive systems of a kind of pure electric automobile integrated form planet circular system of the present utility model have saved in the orthodox car transmission system main gear reducer structure in power-transfer clutch and drive axle etc., I gear transmitting ratio is 10.2, the number of teeth that II gear transmitting ratio is 3.4, two gear planet gear train speed changers and each transmission gear of diff is as shown in table 1.
Table 1 gear table of gear tooth number
When drive motor 1 drives first order sun wheel 3 to rotate, two gear planet gear train speed changers are stirred sliding hub 14 by selector fork 12, under slide block 15 and baulk ring 13 combineds action, engage respectively gear ring 11, second with first and engage gear ring 17 engagements, realize the smooth-going switching of low gear, high gear and neutral, and power is passed to differential gear box 18, drive left half axle 24 and right axle shaft 22 rotates, so drive that vehicle is realized low speed driving, runs at high speed, braked, reversing and trailer operating condition.
Two gear power drive systems of a kind of pure electric automobile integrated form planet circular system of the present utility model at low speed driving, the working process running at high speed, brake under the operating mode such as travel, reverse travel and trailer travel is:
1., when vehicle start is with the climbing low speed driving, two gear power drive systems of integrated form planet circular system are in low gear (I) running state.Stir sliding hub 14 by selector fork 12 and engage gear ring 11 to first of low gear and move, sliding hub 14 slides left, complete and put into gear, as shown in Figure 2.The corresponding torque and rotational speed of drive motor 1 output, and drive vehicle to realize low speed driving through two gear planet gear train speed changers, differential gear box 18 and left half axle 24, right axle shaft 22.Its power transfer path is:
Sun wheel 7 → second stage, output shaft 2 → first order sun wheel 3 → first order pinion carrier 4 → second stage pinion carrier 9 → differential gear box 18 → left half axle 24 of drive motor 1, right axle shaft 22 → left and right wheel;
Now second stage gear ring 10 engages gear ring 11 engagements by the sliding hub 14 of synchro with first, because the first joint gear ring 11 is affixed with case of transmission 25 end caps, it is connecting element, the rotating speed of the 3rd tubular axis of second stage gear ring 10 is zero, so the time two gear planet gear train speed changers transmitting ratios can be expressed as:
(1)
Z in formula a1the number of teeth of-first order sun wheel 3; Z b1the number of teeth of-first order gear ring 6; Z a2the number of teeth of-second stage sun wheel 7; Z b2the number of teeth of-second stage gear ring 10;
2. during high vehicle speeds, two gear power drive systems of integrated form planet circular system are in high gear (II) running state.Stir sliding hub 14 by selector fork 12 and engage gear ring 17 to second of high gear and move, sliding hub 14 slides to the right, completes and puts into gear, as shown in Figure 3.The corresponding torque and rotational speed of drive motor 1 output, and drive vehicle to realize running at high speed through two gear planet gear train speed changers, differential gear box 18 and left half axle 24, right axle shaft 22.Its power transfer path is:
Sun wheel 7 → second stage, output shaft 2 → first order sun wheel 3 → first order pinion carrier 4 → second stage pinion carrier 9 → differential gear box 18 → left half axle 24 of drive motor 1, right axle shaft 22 → left and right wheel;
Now second stage gear ring 10 engages gear ring 17 engagements by the sliding hub 14 of synchro with second, the 3rd tubular axis of second stage gear ring 10 and the second tubular axis locking of second stage pinion carrier 9 and integral-rotation, and with the first tubular axis synchronous rotary of first order pinion carrier 4, so the time two gear planet gear train speed changers transmitting ratios can be expressed as:
(2)
3. when braking energy reclaims, two gear power drive systems of integrated form planet circular system are in low gear (I) running state.Power transfer path is identical with the low speed driving operating mode, and as shown in Figure 2, drive motor 1, in generating state, realizes that energy reclaims;
4. while moveing backward low speed driving, two gear power drive systems of integrated form planet circular system are in low gear (I) running state, and as shown in Figure 2, now drive motor 1 reversion, realize that vehicle backing travels;
5. vehicle be when in operational process, et out of order need to tow, now drive motor 1 freedom of entry mode state.Drive sliding hub 14 by selector fork 12 and move axially, complete and pluck the neutral separation, make each parts in separate state, and outage, realize that the trailer under neutral position state travels, as shown in Figure 4.

Claims (2)

1. two of a pure electric automobile integrated form planet circular system keep off power drive systems, comprise gearshift, diff, left half axle and the right axle shaft of drive motor, change-speed box, tape synchronizer, the mouth of the output shaft of drive motor extends the electric machine casing outside; Diff comprises differential gear box, planet wheel spindle, diff satellite gear, left half axle gear, right axle shaft gear, be respectively equipped with two diff satellite gears by planet wheel spindle between left half axle gear and right axle shaft gear, the two ends of planet wheel spindle are located at respectively on differential gear box, it is characterized in that: described change-speed box, for by first order planet circular system and second stage planet circular system two gear planet gear train speed changers in series, comprises the case of transmission of cylindrical tube;
The output shaft of described drive motor is hollow shaft, be fixed with first order sun wheel on the overhanging end of described output shaft, be provided with first order gear ring corresponding to first order sun wheel, described first order gear ring is located in an end of case of transmission, between first order sun wheel and first order gear ring, by first order pinion carrier, coordinates and is provided with three first order satellite gears; First order sun wheel, first order gear ring, first order pinion carrier and three first order satellite gears form first order planet circular system; Three first order satellite gears are positioned at an axial side of first order pinion carrier, the axial opposite side of first order pinion carrier is the first tubular axis, the first tubular axis of first order pinion carrier, as the output shaft of first order planet circular system, is provided with second stage sun wheel by spline fitted on the first tubular axis of first order pinion carrier; Be provided with second stage gear ring corresponding to second stage sun wheel; Coordinate and be provided with three second stage satellite gears by second stage pinion carrier between second stage sun wheel and second stage gear ring, second stage sun wheel, second stage gear ring, second stage pinion carrier and three second stage satellite gears form second stage planet circular system; First order planet circular system and second stage planet circular system two gear planet gear train speed changers in series; Three second stage satellite gears are positioned at an axial side of second stage pinion carrier, and the axial opposite side of second stage pinion carrier is the second tubular axis, the output shaft that the second tubular axis of second stage pinion carrier is second stage planet circular system; An axial side of described second stage gear ring is the 3rd tubular axis, and described the 3rd pipe sleeve is located on the second tubular axis of second stage pinion carrier, and the second tubular axis of second stage pinion carrier is through the 3rd tubular axis; First order planet circular system and second stage planet circular system all are positioned at case of transmission, one end of the case of transmission corresponding with first order gear ring is connecting the casing end face of drive motor, the other end of case of transmission is provided with end cap, and described the 3rd tubular axis and the second tubular axis all extend the end cap outside; First engages gear ring is located on the case of transmission end cap, second engages gear ring is set on the second tubular axis by spline fitted, the first synchro engaged between gear ring and the second joint gear ring is set on the 3rd tubular axis by spline fitted, described synchro is lock ring type inertia synchronizer, comprises baulk ring, sliding hub, slide block and splined hub; The 3rd tubular axis of second stage gear ring is connecting splined hub by spline fitted; Coordinate and be provided with selector fork with synchro; The second the second tubular axis that engages the second stage pinion carrier in the gear ring outside differential gear box by spline joint, be provided with left half axle and right axle shaft in differential gear box, left half axle is through the second tubular axis of second stage pinion carrier, the first tubular axis and the drive motor axle of first order pinion carrier, and be connected with the vehicle left side wheel, right axle shaft is connected with the vehicle right side wheels, and left half axle and right axle shaft are coaxial, left half axle gear is located on left half axle, and the right axle shaft gear is located on right axle shaft; The axis of the axis of the axis of the output shaft of drive motor, two gear planet gear train speed changers and the left half axle of diff and right axle shaft is on the same straight line.
2. two of a kind of pure electric automobile integrated form planet circular system according to claim 1 keep off power drive systems, it is characterized in that: the case of transmission middle part between first order planet circular system and second stage planet circular system radially is provided with the reinforcement gusset of ring-type, to support the drive disk assembly in change-speed box.
CN2013204271639U 2013-07-18 2013-07-18 Two-gear power transmission system of integrated planetary gear train of pure electric vehicle Withdrawn - After Issue CN203331824U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103332108A (en) * 2013-07-18 2013-10-02 合肥工业大学 Two-gear power transmission system for BEV integrated planetary gear train
CN103935237A (en) * 2014-04-13 2014-07-23 福建亚南电机有限公司 Electrically-driven variable-speed axle integrated with two-gear gearbox, main reducer and differential mechanism
US10053117B2 (en) * 2016-08-25 2018-08-21 Progress Rail Locomotive Inc. Consists with linear throttle mapping
CN110657202A (en) * 2018-06-29 2020-01-07 比亚迪股份有限公司 Transmission, power driving system and vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103332108A (en) * 2013-07-18 2013-10-02 合肥工业大学 Two-gear power transmission system for BEV integrated planetary gear train
CN103332108B (en) * 2013-07-18 2015-10-28 合肥工业大学 A kind of two shift power drive system systems of pure electric automobile integrated form planet circular system
CN103935237A (en) * 2014-04-13 2014-07-23 福建亚南电机有限公司 Electrically-driven variable-speed axle integrated with two-gear gearbox, main reducer and differential mechanism
CN103935237B (en) * 2014-04-13 2016-03-23 福建亚南电机有限公司 A kind of electrically driven speed change bridge of integrated two gear change speed gear box, main reduction gear and difies
US10053117B2 (en) * 2016-08-25 2018-08-21 Progress Rail Locomotive Inc. Consists with linear throttle mapping
CN110657202A (en) * 2018-06-29 2020-01-07 比亚迪股份有限公司 Transmission, power driving system and vehicle

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