CN202577388U - Ground leveling performance improving device of digger - Google Patents
Ground leveling performance improving device of digger Download PDFInfo
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- CN202577388U CN202577388U CN 201220198146 CN201220198146U CN202577388U CN 202577388 U CN202577388 U CN 202577388U CN 201220198146 CN201220198146 CN 201220198146 CN 201220198146 U CN201220198146 U CN 201220198146U CN 202577388 U CN202577388 U CN 202577388U
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- oil circuit
- dipper
- swing arm
- control valve
- valve
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Abstract
The utility model relates to a ground leveling performance improving device of a digger, which comprises an engine, a right pump, a left pump, an overflow valve, a control pump, a check valve, a movable arm II control valve, a movable arm I control valve, a bucket arm I control valve, a bucket arm II control valve, movable arm handles, bucket arm handles and oil ways, wherein bucket arm oil ways connected with the bucket arm handles are divided into two ways, and one way is connected with a left pilot cavity of the bucket arm I control valve and a pilot cavity of a hydraulic control valve through the oil way, or directly connected with the left pilot cavity of the bucket arm I control valve through the oil way; and movable arm oil ways connected with the movable arm handles are divided into two ways, and one way is connected with a right pilot cavity of the movable arm II control valve through the hydraulic control valve or a second electromagnetic valve. According to the ground leveling performance improving device, when the digger is used for leveling ground, movable arms rise without confluence, and bucket arms dig without confluence, i.e., oil is respectively supplied by independent pumps to the bucket arms and the movable arms, so as to guarantee independence of each other and not to interfere with each other. The ground leveling performance improving device has the advantage of easiness in control, the utilization ratio of energy sources is increased, and more energy sources are saved.
Description
Technical field
The utility model belongs to the excavator technical field, particularly relates to a kind of smoothening capability of excavator and improves device.
Background technology
Excavator must be handled swing arm and dipper simultaneously when leveling land and cut the slope, make the bucket point can move (as depicted in figs. 1 and 2) along straight line, is the composite move of dipper excavation and swing arm rising this moment.
The conventional excavator hydraulic circuit of leveling land is as shown in Figure 3, and it mainly comprises: motor, right pump, left pump, overflow valve, control pump, swing arm II control valve, dipper I control valve, bucket arm cylinder, dipper II control valve, swing arm I control valve, swing arm handle, dipper handle and boom cylinder.
When operating swing arm handle and dipper handle simultaneously and make swing arm rise with the dipper excavation respectively, the pressure oil of control pump divides two-way through oil circuit, and one the tunnel flows to the swing arm handle through oil circuit, and one the tunnel flows to the dipper handle through oil circuit.Pressure oil flows into the swing arm oil circuit through the swing arm handle; The swing arm oil circuit divides two-way, and one the tunnel flows to the left end elder generation guide cavity of swing arm I control valve through oil circuit, makes swing arm I control valve shift to position, a left side; One the tunnel flows to the right-hand member elder generation guide cavity of swing arm II control valve through oil circuit, makes swing arm II control valve shift to right position.Pressure oil flows into the dipper oil circuit through the dipper handle; The dipper oil circuit divides two-way, and one the tunnel flows to the left end elder generation guide cavity of dipper I control valve through oil circuit, makes dipper I control valve shift to position, a left side; One the tunnel flows to the right-hand member elder generation guide cavity of dipper II control valve through oil circuit, makes dipper II control valve shift to right position.
At this moment, the pressure oil of left pump divides two-way through oil circuit, and one road warp, first one way valve flows to swing arm II control valve, flows to the rodless cavity of boom cylinder then through second one way valve, oil circuit; One road warp the 3rd one way valve flows to dipper I control valve, flows to the rodless cavity of bucket arm cylinder then through oil circuit.The pressure oil of right pump divides two-way through oil circuit, and one road warp the 5th one way valve flows to swing arm I control valve, flows to the rodless cavity of boom cylinder then through oil circuit; One road warp the 4th one way valve flows to dipper II control valve, flows to the rodless cavity of bucket arm cylinder then through oil circuit.Be the pressure oil of left pump and right pump flows to boom cylinder after oil circuit collaborates rodless cavity, risen in the swing arm interflow; The pressure oil of left side pump and right pump flows to the rodless cavity of bucket arm cylinder after oil circuit collaborates, the dipper interflow is excavated.
The oil return of boom cylinder rod chamber flows to swing arm I control valve through oil circuit, flows back to fuel tank through oil circuit then.The oil return of bucket arm cylinder rod chamber divides two-way through oil circuit, and one the tunnel flows to dipper I control valve through oil circuit, flows back to fuel tank through oil circuit then, and one the tunnel flows to dipper II control valve through oil circuit, flows back to fuel tank through oil circuit then.
The level land shortcoming of operation of the excavator of this routine is: in the process of level land, dipper excavates to rise with swing arm and all collaborates fuel feeding by two pumps, and the first, cause the fuel feeding mutual interference mutually of dipper and swing arm; The second, cause the speed of dipper and swing arm to be difficult to control, make composite move inharmonious; The 3rd, not high to rate request when the level land, the interflow fuel feeding has caused the waste of the energy.
Summary of the invention
The utility model for solve the technical problem that exists in the known technology provide a kind of simple in structure, swing arm is risen do not collaborate and dipper excavates and do not collaborate; Be dipper and swing arm independently of one another by the self-contained pump fuel feeding respectively to guarantee, do not disturb mutually, and the smoothening capability of excavator of easily control improves device.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
A kind of smoothening capability of excavator improves device, and the hydraulic circuit of this device comprises: motor, right pump, left pump, overflow valve, control pump, first one way valve, second one way valve, the 3rd one way valve, the 4th one way valve, the 5th one way valve, swing arm II control valve, swing arm I control valve, bucket arm cylinder, dipper I control valve, dipper II control valve, swing arm handle, dipper handle, boom cylinder and oil circuit; Said dipper handle is connected with the dipper oil circuit, and said dipper oil circuit is divided into two-way; Said swing arm handle is connected with the swing arm oil circuit, and said swing arm oil circuit is divided into two-way,
The oil circuit of wherein leading up to of said dipper oil circuit is connected with the left end elder generation guide cavity of dipper I control valve, is connected through the first guide cavity of oil circuit and pilot operated valve device simultaneously, and another road of said dipper oil circuit is connected with the right first guide cavity of dipper II control valve through solenoid operated directional valve;
Said swing arm oil circuit is wherein leaded up to the left end elder generation guide cavity of oil circuit and swing arm I control valve and is connected, and another road of said swing arm oil circuit is passed through pilot operated valve device and is connected with the right first guide cavity of swing arm II control valve;
Said pilot operated valve device is connected with fuel tank through oil circuit respectively with solenoid operated directional valve.
A kind of smoothening capability of excavator improves device, and the hydraulic circuit of this device comprises: motor, right pump, left pump, overflow valve, control pump, first one way valve, second one way valve, the 3rd one way valve, the 4th one way valve, the 5th one way valve, swing arm II control valve, swing arm I control valve, bucket arm cylinder, dipper I control valve, dipper II control valve, swing arm handle, dipper handle, boom cylinder and oil circuit; Said dipper handle is connected with the dipper oil circuit, and said dipper oil circuit is divided into two-way; Said swing arm handle is connected with the swing arm oil circuit, and said swing arm oil circuit is divided into two-way,
The oil circuit of wherein leading up to of said dipper oil circuit is connected with the left end elder generation guide cavity of dipper I control valve, and another road of said dipper oil circuit is connected with the right first guide cavity of dipper II control valve through solenoid operated directional valve;
The oil circuit of wherein leading up to of said swing arm oil circuit is connected with the left end elder generation guide cavity of swing arm I control valve, and another road of said swing arm oil circuit is connected with the right first guide cavity of swing arm II control valve through second solenoid operated directional valve;
Said pilot operated valve device is connected with fuel tank through oil circuit respectively with second solenoid operated directional valve.
Advantage and the good effect that the utlity model has are:
1. swing arm rose not collaborate to excavate with dipper and does not collaborate when excavator was leveled land, and dipper and swing arm guaranteed the action independently of one another of dipper and swing arm like this, do not disturbed mutually, and made control easy respectively by the self-contained pump fuel feeding, had improved the degree of accuracy of operating.
2. dipper and swing arm by the self-contained pump fuel feeding, have improved rate of energy respectively, and be more energy-conservation.
3. like actual operating mode dipper there are pressure and traffic demand, also can adopt swing arm to rise and not collaborate and dipper excavation interflow.Different operating modes have so just been satisfied to demands for energy.
Description of drawings
Fig. 1 be bucket point along the level ground straight line digging sketch map;
Fig. 2 be bucket point along the sloping floor straight line digging sketch map;
Fig. 3 is conventional level land operation hydraulic schematic diagram;
Fig. 4 is the utility model embodiment one level land operation hydraulic schematic diagram;
Fig. 5 is the utility model embodiment two level lands operation hydraulic schematic diagram.
Among Fig. 1～Fig. 5,1. motor, 2. right pump, 3. left pump, 4. overflow valve, 5. control pump; 6. pilot operated valve device, 7. first one way valve, 8. second one way valve, 9. the 3rd one way valve, 10. the 4th one way valve, 11. the 5th one way valves; 12. swing arm II control valve, 13. swing arm I control valves, 14. solenoid operated directional valves, 15. bucket arm cylinders, 16. dipper I control valves, 17. dipper II control valves; 18. the swing arm handle, 19. dipper handles, 20. boom cylinders, 21. dipper oil circuits, 22. swing arm oil circuits, 23. second solenoid operated directional valves.
The specific embodiment
For further understanding summary of the invention, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
Embodiment one
See also Fig. 4; A kind of smoothening capability of excavator improves device, and the hydraulic circuit of this device comprises: motor 1, right pump 2, left pump 3, overflow valve 4, control pump 5, pilot operated valve device 6, first one way valve 7, second one way valve 8, the 3rd one way valve 9, the 4th one way valve 10, the 5th one way valve 11, swing arm II control valve 12, swing arm I control valve 13, bucket arm cylinder 15, dipper I control valve 16, dipper II control valve 17, swing arm handle 18, dipper handle 19, boom cylinder 20 and oil circuit.Dipper handle 19 is connected with dipper oil circuit 21; Dipper oil circuit 21 is divided into two-way; The oil circuit of wherein leading up to is connected with the left end elder generation guide cavity of dipper I control valve 16; Be connected with pilot operated valve device 6 first guide cavities through oil circuit simultaneously, another road is connected with the right first guide cavity of dipper II control valve 17 through solenoid operated directional valve 14; Swing arm handle 18 is connected with swing arm oil circuit 22, and swing arm oil circuit 22 is divided into two-way, and the oil circuit of wherein leading up to is connected with the left end elder generation guide cavity of swing arm I control valve 13, and another road is connected with the right first guide cavity of swing arm II control valve 12 through pilot operated valve device 6; Pilot operated valve device 6 is connected with fuel tank through oil circuit respectively with solenoid operated directional valve 14.
With dipper handle 19 swing arm is risen and dipper excavates when operating swing arm handle 18 simultaneously, and make solenoid operated directional valve 14 must be electric the time, the pressure oil of control pump 5 divides two-way through oil circuit, and one the tunnel flows to swing arm handle 18, a tunnel through oil circuit flows to dipper handle 19 through oil circuit.Pressure oil enters into dipper oil circuit 21 through dipper handle 19; 21 fens two-way of dipper oil circuit; One the tunnel flows to the left end elder generation guide cavity of dipper I control valve 16 through oil circuit, makes dipper I control valve 16 shift to position, a left side, flows to the first guide cavity of pilot operated valve device 7 and makes pilot operated valve device 7 switching-overs through oil circuit simultaneously; One the tunnel flows to solenoid operated directional valve 14 through oil circuit and since solenoid operated directional valve 14 electric and switching-over, blocked the circulation of fluid, fluid can't flow to the right-hand member elder generation guide cavity of dipper II control valve 17.Promptly when the dipper dredge operation, have only 16 actions of dipper I control valve, dipper II control valve 17 attonitys.Pressure oil enters into swing arm oil circuit 22 through swing arm handle 18; 22 fens two-way of swing arm oil circuit; One the tunnel flows to the left end elder generation guide cavity of swing arm I control valve 13 through oil circuit, makes swing arm I control valve 13 shift to position, a left side, and one the tunnel flows to pilot operated valve device 7 through oil circuit; Because the circulation of fluid has been blocked in the switching-over of pilot operated valve device 7, so fluid can't flow into the first guide cavity of swing arm II control valve 12.Promptly on swing arm, during lift operations, have only 13 actions of swing arm I control valve, swing arm II control valve 12 attonitys.
At this moment, because swing arm II control valve 12 attonitys, the pressure oil of left pump 3 flows to dipper I control valve 16 through oil circuit, the 3rd one way valve 9, flows to the rodless cavity of bucket arm cylinder 15 then through oil circuit.Because dipper II control valve 17 attonitys, the pressure oil of right pump 2 enters into the 5th one way valve 11 through oil circuit, flows to swing arm I control valve 13 again, flows to the rodless cavity of boom cylinder 20 then through oil circuit.The pressure oil that is right pump 2 flows to the rodless cavity of boom cylinder 20 through swing arm I control valve 13, makes swing arm not collaborate to rise; The pressure oil of left side pump 3 flows to the rodless cavity of bucket arm cylinder 15 through dipper I control valve 16, makes dipper not collaborate to excavate.
The oil return of boom cylinder 20 rod chambers flows to swing arm I control valve 13 through oil circuit, flows back to fuel tank through oil circuit 6 then.The oil return of bucket arm cylinder 15 rod chambers flows to dipper I control valve 16 through oil circuit, flows back to fuel tank through oil circuit then.
Embodiment two
See also Fig. 5; A kind of smoothening capability of excavator improves device; The hydraulic circuit of this device comprises: motor 1, right pump 2, left pump 3, overflow valve 4, control pump 5, first one way valve 7, second one way valve 8, the 3rd one way valve 9, the 4th one way valve 10, the 5th one way valve 11, swing arm II control valve 12, swing arm I control valve 13, solenoid operated directional valve 14, bucket arm cylinder 15, dipper I control valve 16, dipper II control valve 17, swing arm handle 18, dipper handle 19, boom cylinder 20, the second solenoid operated directional valve 23 and oil circuits.Dipper handle 19 is connected with dipper oil circuit 21, and dipper oil circuit 21 is divided into two-way, and the oil circuit of wherein leading up to is connected with the left end elder generation guide cavity of dipper I control valve 16, and another road is connected with the right first guide cavity of dipper II control valve 17 through solenoid operated directional valve 14; Swing arm handle 18 is connected with swing arm oil circuit 22, and swing arm oil circuit 22 is divided into two-way, and the oil circuit of wherein leading up to is connected with the left end elder generation guide cavity of swing arm I control valve 13, and another road is connected with the right first guide cavity of swing arm II control valve 12 through second solenoid operated directional valve 23; Second solenoid operated directional valve 23 is connected with fuel tank through oil circuit respectively with solenoid operated directional valve 14.
Swing arm is risen and the dipper excavation when operating swing arm handle 18 simultaneously with dipper handle 19; And make second solenoid operated directional valve 23, solenoid operated directional valve 14 when electric; The pressure oil of control pump 5 divides two-way through oil circuit, and one the tunnel flows to swing arm handle 18, a tunnel through oil circuit flows to dipper handle 19 through oil circuit.Pressure oil enters into dipper oil circuit 21 behind dipper handle 19,21 fens two-way of dipper oil circuit, and one the tunnel flows to the left end elder generation guide cavity of dipper I control valve 16 through oil circuit, makes dipper I control valve 13 shift to position, a left side; One the tunnel flows to solenoid operated directional valve 14 through oil circuit and since solenoid operated directional valve 14 electric and switching-over, blocked the circulation of fluid, fluid can't flow to the right-hand member elder generation guide cavity of dipper II control valve 17.Promptly when the dipper dredge operation, have only 16 actions of dipper I control valve, dipper II control valve 17 attonitys.Pressure oil gets into swing arm oil circuit 22 through swing arm handle 18; 22 fens two-way of swing arm oil circuit, the one tunnel flows to the left end elder generation guide cavity of swing arm I control valve 13 through oil circuit, makes swing arm I control valve 13 shift to position, a left side; One the tunnel flows to second solenoid operated directional valve 23 through oil circuit; Because second solenoid operated directional valve 23 gets electric and switching-over, has blocked the circulation of fluid, so fluid can't flow into the first guide cavity of swing arm II control valve 12.Promptly on swing arm, during lift operations, have only 13 actions of swing arm I control valve, swing arm II control valve 12 attonitys.
At this moment, because swing arm II control valve 12 attonitys, the pressure oil of left pump 3 gets into the 4th one way valve 10 through oil circuit, flows to dipper I control valve 16 again, flows to the rodless cavity of bucket arm cylinder 15 then through oil circuit.Because dipper II control valve 17 attonitys, the pressure oil of right pump 2 flows into the 5th one way valve 11 through oil circuit, flows to swing arm I control valve 13 again, flows to the rodless cavity of boom cylinder 20 then through oil circuit.The pressure oil that is right pump 2 flows to the rodless cavity of boom cylinder 20 through swing arm I control valve 13, makes swing arm not collaborate to rise; The pressure oil of left side pump 3 flows to the rodless cavity of bucket arm cylinder 15 through dipper I control valve 16, makes dipper not collaborate to excavate.
The oil return of boom cylinder 20 rod chambers flows to swing arm I control valve 13 through oil circuit, flows back to fuel tank through oil circuit then.The oil return of bucket arm cylinder 15 rod chambers flows to dipper I control valve 16 through oil circuit, flows back to fuel tank through oil circuit then.
Pilot operated valve device 6, solenoid operated directional valve 14 and second solenoid operated directional valve 23 are the gate valve with keying and commutation function in the utility model.
Can know according to above analysis; Swing arm rose not collaborate to excavate with dipper and does not collaborate when excavator was leveled land, and promptly dipper and swing arm have guaranteed the action independently of one another of dipper and swing arm, do not disturbed mutually respectively by the self-contained pump fuel feeding; And make control easily; Improve the degree of accuracy of operation, and improved rate of energy, more energy-conservation.Like actual operating mode dipper is had pressure and traffic demand, also can adopt swing arm to rise and not collaborate to excavate the interflow with dipper, so just satisfied different operating modes to demands for energy, this kind situation is also within the utility model protection domain.
Claims (2)
1. a smoothening capability of excavator improves device, and the hydraulic circuit of this device comprises: motor (1), right pump (2), left pump (3), overflow valve (4), control pump (5), first one way valve (7), second one way valve (8), the 3rd one way valve (9), the 4th one way valve (10), the 5th one way valve (11), swing arm II control valve (12), swing arm I control valve (13), bucket arm cylinder (15), dipper I control valve (16), dipper II control valve (17), swing arm handle (18), dipper handle (19), boom cylinder (20) and oil circuit; Said dipper handle (19) is connected with dipper oil circuit (21), and said dipper oil circuit (21) is divided into two-way; Said swing arm handle (18) is connected with swing arm oil circuit (22), and said swing arm oil circuit (22) is divided into two-way, it is characterized in that,
The oil circuit of wherein leading up to of said dipper oil circuit (21) is connected with the left end elder generation guide cavity of dipper I control valve (16); Be connected with the first guide cavity of pilot operated valve device (6) through oil circuit simultaneously, another road of said dipper oil circuit (21) is connected with the right first guide cavity of dipper II control valve (17) through solenoid operated directional valve (14);
The oil circuit of wherein leading up to of said swing arm oil circuit (22) is connected with the left end elder generation guide cavity of swing arm I control valve (13), and another road of said swing arm oil circuit (22) is connected with the right first guide cavity of swing arm II control valve (12) through pilot operated valve device (6); Said pilot operated valve device (6) is connected with fuel tank through oil circuit respectively with solenoid operated directional valve (14).
2. a smoothening capability of excavator improves device, and the hydraulic circuit of this device comprises: motor (1), right pump (2), left pump (3), overflow valve (4), control pump (5), first one way valve (7), second one way valve (8), the 3rd one way valve (9), the 4th one way valve (10), the 5th one way valve (11), swing arm II control valve (12), swing arm I control valve (13), bucket arm cylinder (15), dipper I control valve (16), dipper II control valve (17), swing arm handle (18), dipper handle (19), boom cylinder (20) and oil circuit; Said dipper handle (19) is connected with dipper oil circuit (21), and said dipper oil circuit (21) is divided into two-way; Said swing arm handle (18) is connected with swing arm oil circuit (22), and said swing arm oil circuit (22) is divided into two-way, it is characterized in that,
The oil circuit of wherein leading up to of said dipper oil circuit (21) is connected with the left end elder generation guide cavity of dipper I control valve (16), and another road of said dipper oil circuit (21) is connected with the right first guide cavity of dipper II control valve (17) through solenoid operated directional valve (14);
The oil circuit of wherein leading up to of said swing arm oil circuit (22) is connected with the left end elder generation guide cavity of swing arm I control valve (13); Another road of said swing arm oil circuit (22) is connected with the right first guide cavity of swing arm II control valve (12) through second solenoid operated directional valve (23);
Said pilot operated valve device (6) is connected with fuel tank through oil circuit respectively with second solenoid operated directional valve (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220198146 CN202577388U (en) | 2012-05-04 | 2012-05-04 | Ground leveling performance improving device of digger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220198146 CN202577388U (en) | 2012-05-04 | 2012-05-04 | Ground leveling performance improving device of digger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202577388U true CN202577388U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220198146 Expired - Lifetime CN202577388U (en) | 2012-05-04 | 2012-05-04 | Ground leveling performance improving device of digger |
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| Country | Link |
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| CN (1) | CN202577388U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851040A (en) * | 2014-03-14 | 2014-06-11 | 三一重机有限公司 | Energy regeneration system of excavator and excavator |
| CN106930342A (en) * | 2017-04-25 | 2017-07-07 | 柳州柳工挖掘机有限公司 | Hydraulic crawler excavator |
-
2012
- 2012-05-04 CN CN 201220198146 patent/CN202577388U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851040A (en) * | 2014-03-14 | 2014-06-11 | 三一重机有限公司 | Energy regeneration system of excavator and excavator |
| CN106930342A (en) * | 2017-04-25 | 2017-07-07 | 柳州柳工挖掘机有限公司 | Hydraulic crawler excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261206 Beihai South Road, Fangzi District, Shandong, No. 192, No. Patentee after: LOVOL HEAVY INDUSTRY Co.,Ltd. Address before: 261206 Beihai South Road, Fangzi District, Shandong, No. 192, No. Patentee before: FOTON LOVOL INTERNATIONAL HEAVY INDUSTRY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170802 Address after: 266500 No. 75 east the Yellow River Road, Huangdao District, Shandong, Qingdao Patentee after: QINGDAO LOVOL ENGINEERING MACHINERY Co.,Ltd. Address before: 261206 Beihai South Road, Fangzi District, Shandong, No. 192, No. Patentee before: LOVOL HEAVY INDUSTRY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: LOVOL Engineering Machinery Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: QINGDAO LOVOL ENGINEERING MACHINERY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |