CN104389939A - Semitrailer gooseneck hydraulic buffer device - Google Patents
Semitrailer gooseneck hydraulic buffer device Download PDFInfo
- Publication number
- CN104389939A CN104389939A CN201410646103.5A CN201410646103A CN104389939A CN 104389939 A CN104389939 A CN 104389939A CN 201410646103 A CN201410646103 A CN 201410646103A CN 104389939 A CN104389939 A CN 104389939A
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- CN
- China
- Prior art keywords
- hydraulic cylinder
- oil hydraulic
- rear end
- connecting rod
- gooseneck
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a semitrailer gooseneck hydraulic buffer device, which comprises a hydraulic system and a mechanical device structure. The semitrailer gooseneck hydraulic buffer device has the advantages that the relative vibration between a traction vehicle and a semitrailer is effectively reduced, the pressure of the system is conveniently adjusted, then the rigidity of a hydraulic spring of the system is changed, and the rigidity of a spring of the buffer mechanism is changed, so the requirements of different vehicles and different carrying weights are met; the transverse relative displacement and the angle between a traction pin assembly and a gooseneck are limited, and the transverse stability of the semitrailer is improved.
Description
Technical field
The present invention relates to a kind of semitrailer gooseneck hydraulic damping device.Belong to technical field of hydraulic.
Background technique
At present, semitrailer is widely used in highway transport, in highway transport process, due to reasons such as pavement behavior, vehicle acceleration and deceleration and turn inside diameters, tractor and semitrailer gooseneck connection part there will be Relative Vibration phenomenon, and adopt mechanical type Hard link between traditional semitrailer and tractor, can not weaken this Relative Vibration well, this not only can impact the rideability of vehicle, even can affect the driving safety of vehicle.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of semitrailer gooseneck hydraulic damping device, its structure is simple, hydraulic system is succinct, easy to operate, this device effectively can reduce the Relative Vibration of tractor and semitrailer gooseneck connection part, semitrailer is run more steady, safer.
The object of the present invention is achieved like this: a kind of semitrailer gooseneck hydraulic damping device, it to comprise on the left of fuel tank, filter, oil hydraulic pump, accumulator, rear end on the left of oil hydraulic cylinder, front end on the right side of oil hydraulic cylinder, front end on the right side of oil hydraulic cylinder, rear end on the left of oil hydraulic cylinder, rear end on the left of connecting rod, front end on the right side of connecting rod, front end connecting rod and towing pin assembly on the right side of connecting rod, rear end, on the left of described rear end on the right side of oil hydraulic cylinder, rear end on the left of oil hydraulic cylinder and front end on the right side of oil hydraulic cylinder, front end oil hydraulic cylinder be arranged symmetrically in the inner both sides of gooseneck respectively;
On the left of described rear end, on the right side of oil hydraulic cylinder and rear end, one end of oil hydraulic cylinder is articulated with on gooseneck rear cross beam respectively, the other end respectively with rear end on the left of on the right side of connecting rod and rear end connecting rod be hinged, on the left of described rear end, on the right side of connecting rod and rear end, one end of connecting rod is hinged with gooseneck middle cross beam respectively, and the other end is hinged with towing pin assembly respectively;
On the left of described front end, on the right side of oil hydraulic cylinder and front end, one end of oil hydraulic cylinder is articulated with on gooseneck middle cross beam respectively, the other end respectively with front end on the left of on the right side of connecting rod and front end connecting rod be hinged, on the left of described front end, on the right side of connecting rod and front end, one end of connecting rod is articulated with on gooseneck front cross beam respectively, and the other end is hinged with towing pin assembly respectively;
Described oil hydraulic pump is connected with fuel tank by filter, hydraulic pump outlet is connected with the filler opening of relief valve and selector valve respectively, the return opening of described selector valve directly connects fuel tank, and described selector valve oil outlet is connected with the large chamber of oil hydraulic cylinder on the right side of the large chamber of oil hydraulic cylinder on the left of accumulator, rear end and rear end respectively by adjustable restrictive valve.
On the left of described rear end, the large chamber of oil hydraulic cylinder is connected with oil hydraulic cylinder loculus on the left of front end, on the left of described rear end, oil hydraulic cylinder loculus is connected with the large chamber of oil hydraulic cylinder on the left of described front end by one-way throttle valve, wherein on the left of rear end, oil hydraulic cylinder loculus is connected with described one-way throttle valve oil outlet, on the left of described front end, the large chamber of oil hydraulic cylinder is connected with oil hydraulic cylinder loculus on the right side of front end, on the left of described front end, oil hydraulic cylinder loculus is connected with the large chamber of oil hydraulic cylinder on the right side of front end by one-way throttle valve, wherein on the left of front end, oil hydraulic cylinder loculus is connected with the oil outlet of one-way throttle valve, on the right side of described front end, the large chamber of oil hydraulic cylinder is connected with oil hydraulic cylinder loculus on the right side of rear end, on the right side of described front end, oil hydraulic cylinder loculus is connected with the large chamber of oil hydraulic cylinder on the right side of rear end by one-way throttle valve, wherein on the right side of front end, oil hydraulic cylinder loculus connects the oil outlet of one-way throttle valve.
Described accumulator outlet oil circuit is provided with pressure gauge.
Described towing pin assembly is longitudinally adopting guide groove to coordinate with gooseneck middle cross beam.
Compared with prior art, the invention has the beneficial effects as follows:
Two large chambeies of oil hydraulic cylinder of the present invention are connected with one-way throttle valve with between loculus, when vehicle is subject to uneven road surface excitation, with when there is relative vibration between tractor saddle or impact in gooseneck towing pin assembly, the piston of buffering hydraulic cylinder and piston rod assembly can be reciprocating relative to cylinder barrel, this buffer hydraulic system can be played slow down the effect of impact and absorbing vibration; In this system, hand-operated direction valve can control system oil-feed and fuel-displaced, thus changes system hydraulic spring stiffness by changing energy storage pressure, and manual throttle valve can control system oil-feed and fuel-displaced speed, energy storage pressure adjustment is become and more easily controls.The hinging structure of towing pin assembly, connecting rod and oil hydraulic cylinder, the Relative Vibration between towing pin assembly and gooseneck fully can be reflected in the piston rod of oil hydraulic cylinder and the relative displacement of cylinder barrel, make the more vibrational energy of hydraulic system consumption, effectiveness in vibration suppression is more obvious.Longitudinally adopt guide groove to coordinate between towing pin assembly with gooseneck middle cross beam, the horizontal relative displacement of restriction towing pin assembly and gooseneck and horizontal relative angle, ensure the roll stability of semitrailer.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of semitrailer gooseneck of the present invention hydraulic damping device mechanical part.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is a kind of semitrailer gooseneck of the present invention hydraulic damping device hydraulic system principle figure.
Wherein:
Fuel tank 1, filter 2, oil hydraulic pump 3, relief valve 4, selector valve 5, adjustable restrictive valve 6, pressure gauge 7, accumulator 8, oil hydraulic cylinder 9.1 on the left of rear end, oil hydraulic cylinder 9.2 on the left of front end, oil hydraulic cylinder 9.3 on the right side of front end, oil hydraulic cylinder 9.4 on the right side of rear end, one-way throttle valve 10.1, one-way throttle valve 10.3, one-way throttle valve 10.3, gooseneck front cross beam 11, gooseneck middle cross beam 12, gooseneck rear cross beam 13, connecting rod 14.1 on the left of rear end, connecting rod 14.2 on the left of front end, connecting rod 14.3 on the right side of front end, connecting rod 14.4 on the right side of rear end, towing pin assembly 15
.
Embodiment
See Fig. 1-Fig. 3, the present invention relates to a kind of semitrailer gooseneck hydraulic damping device, it to comprise on the left of fuel tank 1, filter 2, oil hydraulic pump 3, accumulator 8, rear end on the left of oil hydraulic cylinder 9.1, front end on the right side of oil hydraulic cylinder 9.2, front end on the right side of oil hydraulic cylinder 9.3, rear end on the left of oil hydraulic cylinder 9.4, rear end on the left of connecting rod 14.1, front end on the right side of connecting rod 14.2, front end connecting rod 14.4 and towing pin assembly 15 on the right side of connecting rod 14.3, rear end.
On the left of described rear end, one end of oil hydraulic cylinder 9.1 is articulated with on gooseneck rear cross beam 13, the other end is articulated with connecting rod 14.1 on the left of rear end, on the left of described rear end, one end of connecting rod 14.1 is articulated with on gooseneck middle cross beam 12, the other end is articulated with the left rear side of towing pin assembly 15, on the left of described front end, one end of oil hydraulic cylinder 9.2 is articulated with gooseneck middle cross beam 12, the other end to be articulated with on the left of front end on connecting rod 14.2, on the left of described front end, one end of connecting rod 14.2 is articulated with on gooseneck front cross beam 11, the other end is articulated with towing pin assembly 15 front left side, on the right side of described front end, oil hydraulic cylinder 9.3 one end is articulated with gooseneck middle cross beam 12, the other end is articulated with connecting rod 14.3 on the right side of front end, on the right side of described front end, connecting rod 14.3 one end is articulated with gooseneck front cross beam 11, the other end is articulated with towing pin assembly 15 forward right side, on the right side of described rear end, oil hydraulic cylinder 9.4 one end is articulated with gooseneck rear cross beam 13, the other end is articulated with connecting rod 14.4 on the right side of rear end, on the right side of described rear end, one end of connecting rod 14.4 is articulated with on gooseneck middle cross beam 12, the other end is articulated with towing pin assembly 15 right lateral side, described towing pin assembly 15 is longitudinally adopting guide groove to coordinate with gooseneck middle cross beam 12, the lateral displacement of restriction towing pin assembly 15, towing pin assembly, the hinging structure of connecting rod and oil hydraulic cylinder, Relative Vibration between towing pin assembly and gooseneck fully can be reflected in the piston rod of oil hydraulic cylinder and the relative displacement of cylinder barrel, make the more vibrational energy of hydraulic system consumption, effectiveness in vibration suppression is more obvious.
Described fuel tank 1, filter 2, oil hydraulic pump 3 and accumulator 8 are arranged on the arbitrary position of semitrailer, described oil hydraulic pump 3 is connected with fuel tank 1 by filter 2, the outlet of oil hydraulic pump 3 is connected with the filler opening of relief valve 4 and the filler opening of selector valve 5 respectively, the return opening of described selector valve 5 directly connects fuel tank, the oil outlet of described selector valve 5 is connected with the large chamber of oil hydraulic cylinder 9.4 on the right side of the large chamber of oil hydraulic cylinder 9.1 on the left of accumulator 8, rear end, rear end respectively by adjustable restrictive valve 6, and described pressure gauge 7 is connected on the outlet oil circuit of accumulator 8.
On the left of described rear end, the large chamber of oil hydraulic cylinder 9.1 is connected with the loculus of oil hydraulic cylinder on the left of front end 9.2, on the left of described rear end, the loculus of oil hydraulic cylinder 9.1 is connected with the large chamber of oil hydraulic cylinder 9.2 on the left of described front end by one-way throttle valve 10.1, wherein on the left of rear end, the loculus of oil hydraulic cylinder 9.1 is connected with the oil outlet of described one-way throttle valve 10.1, on the left of described front end, the large chamber of oil hydraulic cylinder 9.2 is connected with the loculus of oil hydraulic cylinder on the right side of front end 9.3, on the left of described front end, the loculus of oil hydraulic cylinder 9.2 is connected with the large chamber of oil hydraulic cylinder on the right side of front end 9.3 by one-way throttle valve 10.2, wherein on the left of front end, the loculus of oil hydraulic cylinder 9.2 is connected with the oil outlet of one-way throttle valve 10.2, on the right side of described front end, the large chamber of oil hydraulic cylinder 9.3 is connected with the loculus of oil hydraulic cylinder on the right side of rear end 9.4, on the right side of described front end, the loculus of oil hydraulic cylinder 9.3 is connected with the large chamber of oil hydraulic cylinder on the right side of rear end 9.4 by one-way throttle valve 10.3, wherein on the right side of front end, the loculus of oil hydraulic cylinder 9.3 connects one-way throttle valve 10.3 oil outlet, two large chambeies of oil hydraulic cylinder are connected with one-way throttle valve with between loculus, when vehicle is subject to uneven road surface excitation, with when there is relative vibration between tractor saddle or impact in gooseneck towing pin assembly, the piston of buffering hydraulic cylinder and piston rod assembly can be reciprocating relative to cylinder barrel, this buffer hydraulic system can be played slow down the effect of impact and absorbing vibration.
Claims (4)
1. a semitrailer gooseneck hydraulic damping device, it is characterized in that it comprises fuel tank (1), filter (2), oil hydraulic pump (3), accumulator (8), oil hydraulic cylinder (9.1) on the left of rear end, oil hydraulic cylinder (9.2) on the left of front end, oil hydraulic cylinder (9.3) on the right side of front end, oil hydraulic cylinder (9.4) on the right side of rear end, connecting rod (14.1) on the left of rear end, connecting rod (14.2) on the left of front end, connecting rod (14.3) on the right side of front end, connecting rod (14.4) and towing pin assembly (15) on the right side of rear end, oil hydraulic cylinder (9.1) on the left of described rear end, oil hydraulic cylinder (9.2) on the left of oil hydraulic cylinder (9.4) and front end on the right side of rear end, on the right side of front end, oil hydraulic cylinder (9.3) is arranged symmetrically in the inner both sides of gooseneck respectively,
On the left of described rear end, on the right side of oil hydraulic cylinder (9.1) and rear end, one end of oil hydraulic cylinder (9.4) is articulated with on gooseneck rear cross beam (13) respectively, the other end respectively with rear end on the left of on the right side of connecting rod (14.1) and rear end connecting rod (14.4) be hinged, on the left of described rear end, on the right side of connecting rod (14.1) and rear end, one end of connecting rod (14.4) is hinged with gooseneck middle cross beam (12) respectively, and the other end is hinged with towing pin assembly (15) respectively;
On the left of described front end, on the right side of oil hydraulic cylinder (9.2) and front end, one end of oil hydraulic cylinder (9.3) is articulated with on gooseneck middle cross beam (12) respectively, the other end respectively with front end on the left of on the right side of connecting rod (14.2) and front end connecting rod (14.3) be hinged, on the left of described front end, on the right side of connecting rod (14.2) and front end, one end of connecting rod (14.3) is articulated with on gooseneck front cross beam (11) respectively, and the other end is hinged with towing pin assembly (15) respectively;
Described oil hydraulic pump (3) is connected with fuel tank (1) by filter (2), oil hydraulic pump (3) outlet is connected with the filler opening of relief valve (4) and selector valve (5) respectively, the return opening of described selector valve (5) directly connects fuel tank (1), and described selector valve (5) oil outlet is connected by the large chamber of oil hydraulic cylinder (9.4) on the right side of adjustable restrictive valve (6) respectively chamber large with oil hydraulic cylinder (9.1) on the left of accumulator (8), rear end and rear end.
2. a kind of semitrailer gooseneck hydraulic damping device according to claim 1, it is characterized in that on the left of described rear end, the large chamber of oil hydraulic cylinder (9.1) is connected with oil hydraulic cylinder on the left of front end (9.2) loculus, on the left of described rear end, oil hydraulic cylinder (9.1) loculus is connected by the large chamber of one-way throttle valve (10.1) and oil hydraulic cylinder (9.2) on the left of described front end, wherein on the left of rear end, oil hydraulic cylinder (9.1) loculus is connected with described one-way throttle valve (10.1) oil outlet, on the left of described front end, the large chamber of oil hydraulic cylinder (9.2) is connected with oil hydraulic cylinder on the right side of front end (9.3) loculus, on the left of described front end, oil hydraulic cylinder (9.2) loculus is connected by the large chamber of one-way throttle valve (10.2) and oil hydraulic cylinder on the right side of front end (9.3), wherein on the left of front end, oil hydraulic cylinder (9.2) loculus is connected with the oil outlet of one-way throttle valve (10.2), on the right side of described front end, the large chamber of oil hydraulic cylinder (9.3) is connected with oil hydraulic cylinder on the right side of rear end (9.4) loculus, on the right side of described front end, oil hydraulic cylinder (9.3) loculus is connected by the large chamber of one-way throttle valve (10.3) and oil hydraulic cylinder on the right side of rear end (9.4), wherein on the right side of front end, oil hydraulic cylinder (9.3) loculus connects the oil outlet of one-way throttle valve (10.3).
3. a kind of semitrailer gooseneck hydraulic damping device according to claims 1 or 2, is characterized in that being provided with pressure gauge (7) on described accumulator (8) outlet oil circuit.
4. a kind of semitrailer gooseneck hydraulic damping device according to claim 1 and 2, is characterized in that described towing pin assembly (15) is longitudinally adopting guide groove to coordinate with gooseneck middle cross beam (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410646103.5A CN104389939B (en) | 2014-11-15 | 2014-11-15 | Semitrailer gooseneck hydraulic damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410646103.5A CN104389939B (en) | 2014-11-15 | 2014-11-15 | Semitrailer gooseneck hydraulic damping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104389939A true CN104389939A (en) | 2015-03-04 |
| CN104389939B CN104389939B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410646103.5A Active CN104389939B (en) | 2014-11-15 | 2014-11-15 | Semitrailer gooseneck hydraulic damping device |
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| CN (1) | CN104389939B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5415425A (en) * | 1994-03-10 | 1995-05-16 | E.D. Etnyre & Co. | Apparatus for coupling a gooseneck hitch to a trailer platform |
| CN201033595Y (en) * | 2007-05-08 | 2008-03-12 | 浙江速达大件运输安装工程有限公司 | Gooseneck device of the lift type semitrailer |
| DE202008004675U1 (en) * | 2008-04-05 | 2008-07-10 | H. & W. Nutzfahrzeugtechnik Gmbh | Vehicle frame of a semi-trailer |
| CN201777322U (en) * | 2010-08-31 | 2011-03-30 | 武汉天捷专用汽车有限公司 | Hydraulic gooseneck device |
| CN202806921U (en) * | 2012-10-12 | 2013-03-20 | 甘肃中集华骏车辆有限公司 | Flat-bed trailer with foldable gooseneck |
| CN204344784U (en) * | 2014-11-15 | 2015-05-20 | 江苏海鹏特种车辆有限公司 | Semitrailer gooseneck hydraulic damping device |
-
2014
- 2014-11-15 CN CN201410646103.5A patent/CN104389939B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5415425A (en) * | 1994-03-10 | 1995-05-16 | E.D. Etnyre & Co. | Apparatus for coupling a gooseneck hitch to a trailer platform |
| CN201033595Y (en) * | 2007-05-08 | 2008-03-12 | 浙江速达大件运输安装工程有限公司 | Gooseneck device of the lift type semitrailer |
| DE202008004675U1 (en) * | 2008-04-05 | 2008-07-10 | H. & W. Nutzfahrzeugtechnik Gmbh | Vehicle frame of a semi-trailer |
| CN201777322U (en) * | 2010-08-31 | 2011-03-30 | 武汉天捷专用汽车有限公司 | Hydraulic gooseneck device |
| CN202806921U (en) * | 2012-10-12 | 2013-03-20 | 甘肃中集华骏车辆有限公司 | Flat-bed trailer with foldable gooseneck |
| CN204344784U (en) * | 2014-11-15 | 2015-05-20 | 江苏海鹏特种车辆有限公司 | Semitrailer gooseneck hydraulic damping device |
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| Publication number | Publication date |
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| CN104389939B (en) | 2016-08-17 |
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