CN201896931U - Electrically-driven mechanical variable-speed power transmission system and control system thereof - Google Patents
Electrically-driven mechanical variable-speed power transmission system and control system thereof Download PDFInfo
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- CN201896931U CN201896931U CN2010206752042U CN201020675204U CN201896931U CN 201896931 U CN201896931 U CN 201896931U CN 2010206752042 U CN2010206752042 U CN 2010206752042U CN 201020675204 U CN201020675204 U CN 201020675204U CN 201896931 U CN201896931 U CN 201896931U
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Abstract
The utility model provides an electrically-driven mechanical variable-speed power transmission system for an electric vehicle, comprising a vehicular motor and a changing gearbox, wherein the changing gearbox comprises a power input shaft, a power output shaft, a middle shaft, a gear and a cylinder; the cylinder is connected with a transmission fork by a piston; the transmission fork is correspondingly connected with the gear; an output shaft of the vehicular motor and the input shaft of the changing gearbox are made into the same shaft; the changing gearbox is provided with a gear-shifting interlocking device that consists of an ejector rod, positioning steel balls at two sides of the ejector rod, and the transmission fork; and positioning slots matched with the positioning steel balls are arranged on the transmission fork. Owning to the action of the gear-shifting interlocking device, the problems of gear confusing and faulting and gear abrasion can be avoided during the speed changing process of the changing gearbox which does not adopt a synchronizer, therefore, the gear shifting can be smoother and more reliable.
Description
Technical field
The utility model belongs to the transmission system of electric automobile technical field, is specifically related to a kind of electric driving device formula variable-speed dynamic transmission system.
Background technique
Electric vehicle comprises pure electric automobile, mixed power electric car and fuel cell electric vehicle.Its drive motor often adopts AC induction motor and AC magnetoelectric machine.
These two kinds of motors can adopt converter technique, realize stepless speed regulation, thereby generally do not require variable speed drive on industrial machinery.But require height for the speed of a motor vehicle, and require the strong vehicle of grade ability, this configuration then to be difficult to satisfy the requirement of travelling of vehicle simultaneously.Adopt the variable gear ratio gear change-speed gearing can satisfy the requirement of travelling of highest speed, and improve the wheel grade ability.
Variable gear ratio gear graduation transmission system generally is made up of clutch and gear transmission.The shifting of transmission structural type has three kinds, i.e. straight-tooth sliding gear mode, engagement cover mode, synchronizer shift mode.Straight-tooth sliding gear mode, engagement cover mode can cause gear shift or in conjunction with the problem of impacting, easily cause engaging gear to damage when gear shift.And existing synchronizer friction torque is regulated difficulty, and lock in time is longer, and friction surface is fragile.
Chinese patent application CN200910061844 discloses a kind of automatic gear shifting control system of motor in electric automobile, and it comprises adjustable speed motor, gear transmission, control system, and first of the motor shaft of adjustable speed motor and gear transmission is same axle.The electric machine casing of the output terminal of adjustable speed motor is directly fixedlyed connected with the speed changer body of gear transmission; It has removed the clutch between motor and the gear transmission, has cancelled the synchronizer in traditional speed changer, adopts engagement shell type gearshift mechanism; Utilize the speed-regulating function of motor, realize treating rotating speed, cophasing control such as engaging gear in the gearshift procedure, utilize air pressure (or hydraulic pressure) operating mechanism to finish gear shift, realize the automatic control of system.But in the vehicle operating process, the phenomenon of also cause random shelves, wrong shelves easily, playing gear, gear shift has some setbacks, the generation fault.
Summary of the invention
The purpose of this utility model provides a kind of electric driving device formula variable-speed dynamic transmission system, has not only cancelled the synchronizer of electric automobile gear device, and the phenomenon of also can avoid random shelves, wrong shelves, playing gear has the smooth and easy reliable advantage of gearshift.
Technical solution of the present utility model is: be used for the electric driving device formula variable-speed dynamic transmission system of electric vehicle, comprise automobile-used motor and speed-changing gear box, speed-changing gear box comprises housing, power input shaft, pto, at least one jack shaft, at least one cylinder or oil hydraulic cylinder; Power input shaft, pto, jack shaft are provided with gear, and cylinder or oil hydraulic cylinder are connected with shift fork by piston, and shift fork is connected with corresponding gear; Automobile-used motor output shaft is made same axle with the gearbox input shaft or is fixedlyed connected.Gearbox is provided with by the locking ball of push rod, push rod both sides, the gear shift interlock that shift fork constitutes; Shift fork is provided with the locating slot that cooperates with locking ball.
Preferably, gearbox in the above-mentioned electric driving device formula variable-speed dynamic transmission system adopts the matrix housing, gearbox matrix housing is provided with a plurality of shift feeling inductive switch, in gearbox input shaft, output shaft, jack shaft, can speed probe and encoder be installed according to the control needs, to provide tach signal to control system, the cylinder that gearbox is installed is two, and two gears are housed on the output shaft of gear-box, and two cylinders should be connected with two gear mesh by shift fork respectively.
Preferably, on gear box casing, be processed with a deep hole, thereby the stroke pilot hole of two shifting fork bar positions is run through, what pin during the gear interlock is shifting fork bar, latter two shifting fork bar of interlocking just can only have one can move, and its push rod, steel ball, steel ball are installed in the deep hole between two shifting fork bars.Erection sequence is that shifting fork bar, steel ball, push rod, steel ball, shifting fork bar and five matching relationship is a drive fit.
Preferably, described electric driving device formula variable-speed dynamic transmission system is equipped with fan at automobile-used motor tail end.Automobile-used motor tail end is equipped with the magnetic resistance rotary transformer that is made of stator and rotor.
Preferably, described electric driving device formula variable-speed dynamic transmission system, its automobile-used motor is automobile-used variable-frequency speed-regualting triphase asynchronous motor.
Preferably, described electric driving device formula variable-speed dynamic transmission system, its automobile-used motor is the variable-frequency speed-regualting triphase permanent-magnet synchronous machine.
The utility model provides a kind of control system of electric driving device formula variable-speed dynamic transmission system simultaneously; Comprise electric machine controller, entire car controller, gearbox, motor, high voltage power distributing cabinet, electromagnetic valve group, shift feeling inductive switch, photoelectric encoder, Hall transducer.Entire car controller is controlled the action of gear shift interlock simultaneously when carrying out self shifter control, gearbox can not be hung simultaneously into two gears.
The utility model is owing to saved synchronizer in gearbox, thereby the corresponding weight that alleviated, and has reduced cost.The utility model is owing to be provided with the gear shift self-locking device that is made of push rod, the locking ball of push rod both sides, shift fork, cylinder on gearbox, thereby the phenomenon that can overcome existing disorderly shelves, wrong shelves, play gear, makes gear shift smooth and easy, and gear shift is more reliable.The utility model is owing to be provided with shift feeling inductive switch, encoder, sensor, cylinder on gearbox, cylinder should be connected with gear mesh by shift fork respectively, and is provided with corresponding control system, thereby can realize automatic many grades of speed changes.After the utility model was implemented, motor was exported by gearbox, had the characteristics of coupling speed change, realized that starting torque is big, electric current is little, plays the effect of protecting battery preferably.The utility model is owing to be equipped with the magnetic resistance rotary transformer that is made of stator and rotor at automobile-used motor tail end, and magnetic resistance rotary transformer connecting line is connected with controller, thereby can send motor speed signal to controller, and then realizes accurate gear-change operation.Be provided with fan at automobile-used motor tail end, can make its radiating effect better.The utlity model has take in light weight, rotary inertia is little, vibration is little, starting torque is big, electric current is little, gear shift is smooth and easy and characteristics accurately and reliably.The utility model is mainly used in electric vehicle.
Description of drawings
Fig. 1 gearbox plan view;
Fig. 2 gearbox one, two, third gear position switch schematic representation;
Fig. 3 gearbox is carried out and is moved back neutral gear process schematic representation;
Fig. 4 gearbox is carried out the process schematic representation that puts in the first speed;
Fig. 5 gearbox is carried out and is hung second gear process schematic representation;
Fig. 6 gearbox is carried out and is hung third gear process schematic representation:
Fig. 7 gearbox erection drawing (1);
Fig. 8 gearbox erection drawing (2);
The air-cooled electric driving device formula speed change electric-only mode power control system overall distribution schematic representation of Fig. 9 shelves;
Figure 10 gear interlock schematic representation;
Figure 11 high voltage power distributing cabinet schematic representation;
Interlock action schematic representation when Figure 12 puts in the first speed;
Interlock action schematic representation when Figure 13 hangs second gear;
Interlock action schematic representation when Figure 14 hangs third gear.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing:
Extremely shown in Figure 14 as Fig. 1.Automobile-used motor 2 is the automobile frequency control motor, can be the Thee-phase alternating current permanent-magnetic synchronous machine, also can adopt ac three-phase asynchronous motor, as being YCVF the series automobiles asynchronous or permanent-magnet synchronous traction electric machine of variable-frequency speed-regualting triphase.
Gearbox 1 is many grades of speed-changing gear boxs.Gearbox 1 adopts the matrix housing, does not have end cap by automobile-used motor 2 front cover adjacents, directly is fixed on automobile-used motor 2 front covers by its edge.Saved clutch between automobile-used motor 2 and the gearbox 1.Gearbox 1 is provided with two cylinders 30, promotes shift fork, and gear shift is used.Automobile-used motor 2 output shafts 27 are gearbox 1 input shaft 27.Be provided with in the gearbox by the locking ball 51,52 of push rod 53, push rod both sides, the gear shift interlock that shift fork constitutes; Shift fork is provided with the locating slot that cooperates with locking ball.Be processed with a deep hole on gearbox 1 housing, thereby the stroke pilot hole of two shifting fork bar positions is run through, what pin during the gear interlock is shifting fork bar 32,50, latter two shifting fork bar of interlocking just can only have one can move, its push rod 53, steel ball 52, steel ball 51 are installed in the deep hole between two shifting fork bars 32,50.Erection sequence is that shifting fork bar 32, steel ball 51, push rod 53, steel ball 52, shifting fork bar 50 and five matching relationship is a drive fit.
Gearbox 1 input shaft 27 is provided with driving tooth 40, gearbox 1 jack shaft 29 is provided with gear 35,36,37, and gear 36,37 cooperates with one group of gear 38,39 on gearbox 1 output shaft 28 realizes many grades of speed changes.Two cylinders 30 by two groups of gear 38,39 corresponding connections on shift fork and gearbox 1 output shaft 28, are realized many grades gear shift by promoting shift fork respectively respectively.
Hall transducer 20 is installed on the output shaft of gear-box; Jack shaft is provided with photoelectric encoder 21, surveys the rotating speed of jack shaft 29 and output shaft 28 simultaneously.
Gearbox 1 matrix housing is provided with five shift feeling inductive switch 11,12,13,14,15, is respectively neutral gear induction switch 11,12; One grade of induction switch 13; Second gear induction switch 14; Third gear induction switch 15.
Encoder 21 is loaded on the jack shaft 29 of gearbox 1, is used to survey gearbox 1 jack shaft 29 and car speed, and signal is passed to frequency-variable controller, carries out closed loop control.On gearbox, be provided with the gear shift self-locking device that locking ball 51,52, shift fork, cylinder by push rod 53, push rod both sides constitute, shift fork is provided with the locating slot that cooperates with locking ball, shift fork is connected with the piston of cylinder, during gear shift, cylinder piston drives shift fork and moves, when gear shift put in place, push rod headed into locking ball in the locating slot on the shift fork, to guarantee gear shift accurately and reliably.The magnetic resistance rotary transformer is made of stator and rotor, is loaded on the tail end of automobile-used motor, and magnetic resistance rotary transformer connecting line is connected with controller, thereby can send motor speed signal to controller, and then realizes accurate gear-change operation.Be provided with fan at automobile-used motor tail end, can make its radiating effect better.
When vehicle starting, with the bottom gear starting, torque is big, makes vehicle starting level and smooth, and current of electric is little, impacts little to battery; After the speed of a motor vehicle reaches certain speed, to adjust rotating speed by the motor frequency conversion controller and reach driven shaft back speed change synchronously, it is top gear that cylinder promotes shift fork automatic speed changing, and automobile is quickened.Otherwise when slowing down, increasing power torque, also is to adjust rotating speed by electric machine controller to reach the synchronous speed change of driven shaft, and cylinder promotes shift fork and becomes bottom gear, makes car deceleration.
The control system of electricity driving device formula variable-speed dynamic transmission system; Comprise electric machine controller, entire car controller 8, gearbox 1, motor 2, high voltage power distributing cabinet, electromagnetic valve group, shift feeling inductive switch 11,12,13,14,15, photoelectric encoder 21, Hall transducer 20.
Fig. 3 carries out for gearbox and moves back neutral gear process schematic representation, the piston 31 of cylinder 30 is positioned at neutral gear position, the steel ball 33 at shifting fork bar 32 neutral gear position places is not done displacement movement upwards, the gear electrical signal that gear signal feeds back to entire car controller 8 is that one grade, second gear, third gear no signal are that the driving switch internal circuit is open circuit, and it is that neutral induction switch internal circuit is closed circuit that two neutral gears have electrical signal.Motor does not have moment output, and motor shaft is that gearbox input shaft 27 is given jack shaft 29 transmission of torque by driving tooth, and the tooth cover is positioned at neutral gear position, and output shaft 28 does not change, and this moment can be by the rotating speed of photoelectric encoder 21 monitoring motors.
Fig. 4 carries out the process schematic representation that puts in the first speed for gearbox, when putting in the first speed, the interface air inlet of position 16, the interface of position 17 is given vent to anger, this moment position 13 switch connections, the switch of position 11 disconnects.When making the return trip empty grade, the interface air inlet of position 17, the interface of position 16 is given vent to anger, and this moment, the switch of position 13 disconnected the switch connection of position 11.The piston 31 of cylinder 30 places a gear to put, this moment, the steel ball 33 at shifting fork bar 32 neutral gear position places was done displacement movement upwards, the gear electrical signal that gear signal feeds back to entire car controller 8 is one grade signal, promptly one grade of gear positions induction switch internal circuit is closed circuit, second gear 22, third gear 23 no signals are that gear positions switch internal circuit is open circuit, it is that this location sensitive switch internal circuit is closed circuit that left side neutral 24 has signal, and right neutral 25 no signals are that shift feeling inductive switch internal circuit is open circuit.Tooth cover 34 is positioned at a gear and puts, motor 2 has moment output, motor shaft 27 is given jack shaft 29 transmission of torque by driving tooth, jack shaft passes to gearbox two 28 by the engagement of gear 35 and gear 38, can be the speed of a motor vehicle this moment by Hall transducer 20 monitoring output shaft rotating speeds, by photoelectric encoder 21 monitoring rotating speed of motor.When putting in the first speed, the gear interlock is action simultaneously also, Figure 12 is interlock action schematic representation when putting in the first speed, shifting fork bar 32 is passed into the pressurized gas drive of gearbox and moves, thereby drive steel ball 51, push rod 53, steel ball 52 move to the b groove, and steel ball 52 is headed into the b groove, finish self-locking action, guaranteed that gearbox two shift forks can the while engage a gear.
Fig. 5 is that gearbox is carried out and hangs second gear process schematic representation, when hanging second gear, the interface air inlet of position 18, the interface of position 19 is given vent to anger, this moment position 14 switch connection, the switch of position 12 disconnects.When making the return trip empty grade, give vent to anger and dying of position 19 simultaneously in position 18, this moment position 12 switch connection, the switch of position 14 and position 15 disconnects.Under the second gear state, the piston 31 of cylinder 30 places the second gear position, the steel ball 33 at shifting fork bar 32 neutral gear position places is done displacement movement upwards, the gear electrical signal that gear signal feeds back to entire car controller 8 is that second gear has signal, be that second gear gear positions induction switch internal circuit is closed circuit, one grade, third gear no signal are that gear positions switch internal circuit is open circuit, and it is that this location sensitive switch internal circuit is closed circuit that right neutral has signal, and left neutral no signal is that shift feeling inductive switch internal circuit is open circuit.Tooth cover 34 is positioned at the second gear position, motor 2 has moment output, motor shaft 27 is given jack shaft 29 transmission of torque by driving tooth 40, jack shaft 29 passes to output shaft of gear-box 28 by the engagement of gear 36 and gear 39, can be the speed of a motor vehicle this moment by Hall transducer 20 monitoring output shaft rotating speeds, by photoelectric encoder 21 monitoring rotating speed of motor.When hanging second gear, the gear interlock is action simultaneously also, and Figure 13 is an interlock action schematic representation when hanging second gear.Shifting fork bar 50 is passed into the pressurized gas drive of gearbox and moves, thereby drives steel ball 52, push rod 53, steel ball 51 to the motion of a groove, and steel ball 51 is headed into a groove, finishes self-locking action, has guaranteed that gearbox two shift forks can the while engage a gear.
Fig. 6 carries out for gearbox and hangs third gear process schematic representation; When hanging third gear, the interface air inlet of position 19, the interface of position 18 is given vent to anger, this moment position 15 switch connection, the switch of position 12 disconnects.When making the return trip empty grade, die in the position 18 of giving vent to anger simultaneously, position 19, this moment position 12 switch connection, the switch of position 14 and position 15 disconnects.Under the third gear state, the piston 31 of cylinder 30 places the third gear position, this moment, the steel ball 33 at shifting fork bar 32 neutral gear position places was done displacement movement upwards, the gear electrical signal that gear signal feeds back to entire car controller 8 is that third gear has signal, be that second gear gear positions induction switch internal circuit is closed circuit, one grade, second gear no signal are that gear positions switch internal circuit is open circuit, it is that this location sensitive switch internal circuit is closed circuit that right neutral has signal, and left neutral no signal is that shift feeling inductive switch internal circuit is open circuit.Tooth cover 34 is positioned at the third gear position, motor 2 has moment output, motor shaft 27 is directly given output shaft 28 transmission of torque by driving tooth 40, tooth cover 34, this process is not passed through the transmission of jack shaft 29 again, be the speed of a motor vehicle by Hall transducer 20 monitoring output shaft rotating speeds this moment, also be motor speed simultaneously, by photoelectric encoder 21 monitoring rotating speed of motor.When hanging third gear, the gear interlock is action simultaneously also, Figure 14 is an interlock action schematic representation when hanging third gear, shifting fork bar 50 is passed into the pressurized gas drive of gearbox and moves, thereby drive steel ball 52, push rod 53, steel ball 51 move to a groove, and steel ball 51 is headed into a groove, finish self-locking action, guaranteed that gearbox two shift forks can the while engage a gear.
Claims (7)
1. electric driving device formula variable-speed dynamic transmission system that is used for electric vehicle, it comprises automobile-used motor (2) and speed-changing gear box (1), speed-changing gear box (1) comprising: housing, power input shaft (27), pto (28), at least one jack shaft (29), at least one cylinder (30) or oil hydraulic cylinder; Power input shaft (27), pto (28), jack shaft (29) are provided with gear (35,36,37,38,39,40), and cylinder or oil hydraulic cylinder are connected with shift fork by piston (31), and shift fork is connected with respective gears; Automobile-used motor (2) output shaft (27) is made same axle with gearbox input shaft (27) or is fixedlyed connected, and it is characterized in that: be provided with in the gearbox by the locking ball (51,52) of push rod (53), push rod both sides, the gear shift interlock that shift fork constitutes; Shift fork is provided with the locating slot that cooperates with locking ball.
2. electric driving device formula variable-speed dynamic transmission system according to claim 1, it is characterized in that: gearbox adopts the matrix housing, gearbox matrix housing is provided with a plurality of shift feeling inductive switch (11,12,13,14,15), in gearbox input shaft (27), output shaft (28), can speed probe (20) and encoder (21) be installed according to the control needs in the jack shaft (29), to provide tach signal to control system, the cylinder that gearbox is installed is two, and gear (38 is housed on the output shaft of gear-box, 39), two cylinders should be connected with gear mesh on the output shaft (28) by shift fork respectively.
3. electric driving device formula variable-speed dynamic transmission system according to claim 1, it is characterized in that: be processed with a deep hole on gearbox (1) housing, thereby the stroke pilot hole of two shifting fork bar positions is run through, what pin during the gear interlock is shifting fork bar (32,50), latter two shifting fork bar of interlocking just can only have one can move, and its push rod (53), steel ball (52), steel ball (51) are installed in the deep hole between two shifting fork bars (32,50); Erection sequence is that shifting fork bar (32), steel ball (51), push rod (53), steel ball (52), shifting fork bar (50) and five matching relationship is a drive fit.
4. electric driving device formula variable-speed dynamic transmission system according to claim 1, it is characterized in that: at automobile-used motor tail end fan is housed, automobile-used motor tail end is equipped with the magnetic resistance rotary transformer that is made of stator and rotor.
5. a kind of electric driving device formula variable-speed dynamic transmission system according to claim 4 is characterized in that:
Described automobile-used motor (2) is automobile-used variable-frequency speed-regualting triphase asynchronous motor.
6. a kind of electric driving device formula variable-speed dynamic transmission system according to claim 4 is characterized in that:
Described automobile-used motor (2) is automobile-used variable-frequency speed-regualting triphase permanent-magnet synchronous machine.
7. the control system of an electric driving device formula variable-speed dynamic transmission system; Comprise electric machine controller, entire car controller (8), gearbox (1), motor (2), high voltage power distributing cabinet, electromagnetic valve group, shift feeling inductive switch (11,12,13,14,15), photoelectric encoder (21), Hall transducer (20), it is characterized in that: speed changer adopts the speed changer described in the claim 1, entire car controller is when carrying out self shifter control, control the described gear shift interlock action of claim 1 simultaneously, gearbox can not be hung simultaneously into two gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206752042U CN201896931U (en) | 2010-12-18 | 2010-12-18 | Electrically-driven mechanical variable-speed power transmission system and control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206752042U CN201896931U (en) | 2010-12-18 | 2010-12-18 | Electrically-driven mechanical variable-speed power transmission system and control system thereof |
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| CN201896931U true CN201896931U (en) | 2011-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206752042U Expired - Lifetime CN201896931U (en) | 2010-12-18 | 2010-12-18 | Electrically-driven mechanical variable-speed power transmission system and control system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042392A (en) * | 2010-12-18 | 2011-05-04 | 襄樊宇清电动汽车有限公司 | Electrically driven mechanical variable speed power transmission system and control system thereof |
| CN102092286A (en) * | 2010-12-18 | 2011-06-15 | 襄樊宇清电动汽车有限公司 | Electric-drive mechanical type variable-speed power transmission system and control system thereof |
-
2010
- 2010-12-18 CN CN2010206752042U patent/CN201896931U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042392A (en) * | 2010-12-18 | 2011-05-04 | 襄樊宇清电动汽车有限公司 | Electrically driven mechanical variable speed power transmission system and control system thereof |
| CN102092286A (en) * | 2010-12-18 | 2011-06-15 | 襄樊宇清电动汽车有限公司 | Electric-drive mechanical type variable-speed power transmission system and control system thereof |
| CN102092286B (en) * | 2010-12-18 | 2012-09-12 | 襄阳宇清传动科技有限公司 | Electric-drive mechanical type variable-speed power transmission system and control system thereof |
| CN102042392B (en) * | 2010-12-18 | 2012-09-12 | 襄阳宇清传动科技有限公司 | Electrically driven mechanical variable speed power transmission system and control system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XIANGYANG YUQING TRANSMISSION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: XIANGFAN YUQING ELECTRIC VEHICLE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 441058 No. 5 Xinxing Road, hi tech Development Zone, Hubei, Xiangyang Patentee after: Xiangyang Yuqing Transmission Technology Co., Ltd. Address before: 441058 Xiangfan city of Hubei Province, No. 2 high-tech Innovation Park Patentee before: Xiangfan Yuqing Electric Vehicle Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110713 Effective date of abandoning: 20120912 |