CN106627649A - Hybrid brake system bogie and engineering vehicle - Google Patents
Hybrid brake system bogie and engineering vehicle Download PDFInfo
- Publication number
- CN106627649A CN106627649A CN201710024276.7A CN201710024276A CN106627649A CN 106627649 A CN106627649 A CN 106627649A CN 201710024276 A CN201710024276 A CN 201710024276A CN 106627649 A CN106627649 A CN 106627649A
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- Prior art keywords
- brake
- composition
- axle box
- disc
- braking system
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/14—Combinations of different types of brakes, e.g. brake blocks acting on wheel-rim combined with disc brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H13/00—Actuating rail vehicle brakes
- B61H13/20—Transmitting mechanisms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a hybrid brake system bogie and an engineering vehicle. The axle box suspension technology is adopted for the device, a single outer round spring is adopted at the upper end of an axle box, an empty and load spring is large in deflection, and the vertical dynamic performance of the vehicle is improved. A disc brake device is large in brake power, meanwhile, abrasion between a large number of pins and sleeves is reduced, and convenience is brought to maintenance and application. A unit type brake shoe brake device is compact in structure and high in brake efficiency, part of brake loads are provided, meanwhile, the function of a tread sweeper is achieved, the adhesion coefficient between wheels and rails is increased, and therefore brake performance is improved. A hybrid brake system is adopted, the requirement of brake heat loads at large axle loads and high retarded velocity is met, and barrier-free running of the engineering vehicle between a subway tunnel and a railway main track is achieved.
Description
Technical field
The present invention relates to a kind of composite braking system bogie and engineering truck, it is adaptable to subway tunnel and railway main track
Engineering truck.
Background technology
Metro Tunnel vehicle running environment is severe, damped condition is complicated, has larger difference with railway main track engineering truck
Not, and the two gauge is different.Otherness result in without the railway that directly can simultaneously run in subway tunnel and railway main track
Engineering truck.Particularly to the engineering truck of axle weight relatively large (17t and more than), single set brake apparatus cannot meet subway tunnel
Frequently brake in road and the big (1.34m/s of braking deceleration2) use requirement, axle braking power holding beyond brake apparatus
By scope, braking thermic load is high, and brake apparatus cannot meet the requirement for using.
The content of the invention
To overcome the deficiencies in the prior art, an object of the present disclosure to be to provide a kind of composite braking system bogie, pass through
By the way of composite braking, vehicle braking and the requirement of thermic load can be effectively met, can be applied to subway tunnel and railway
Main track.
The technical scheme that the present invention is provided is as follows：
A kind of composite braking system bogie, including：
Framework is constituted, and framework composition is in day character form structure；
Axle box hanging device, axle box hanging device connection framework, axle box hanging device is constituted including axle box；
To composition, take turns includes axletree to wheel to composition, fixing vehicle wheel on axletree, and the two ends of axletree are connected with axle box composition, structure
Frame composition by axle box hanging device be seated two-wheeled to composition on；
Disc brake apparatus, disc brake apparatus include brake disc, and brake disc is on axletree and located at wheel inner side；
Brake-shoe brake device, brake-shoe brake device includes brake head connecting rod, and the two ends of brake head connecting rod respectively arrange one and brake
Cylinder is constituted, and the both sides of checking cylinder composition respectively be connecteds with a brake lever, and brake lever upper end and framework are constituted and be connected, lower end and lock
Watt support connecting rod is fixed, and brake head connecting rod is connected with brake head lever, and brake head lever is located at the outside of brake lever, and brake head
Lever is connected with the brake head equipped with brake shoe, and during braking, brake head connecting rod promotes brake head and brake shoe to vertically move the wheel that reclines,
Brake pressure is produced, brake shoe is located at the inner side of wheel.
Above-mentioned composite braking system bogie, using brake-shoe brake device, the brake-shoe brake device of front and back wheel is using same
One checking cylinder is constituted, and compared with traditional modular Block brake, each bogie eliminates two sets of unit brake cylinders, and structure is tight
Gather, retardation efficiency is high, there is provided while partial brake load, serve the effect of tread cleaner, improve viscous between wheel track
Coefficient, so as to improve braking ability；Coordinate the setting of brake disc again, realize composite braking, under meeting big axle weight, high deceleration
The requirement of braking thermic load, meets the damped condition that subway tunnel is braked frequently, thermic load is high；By on vehicle on railway main track
Brake valve adjustment air pressure or closing unit formula brake-shoe brake device come meet railway main track engineering truck operation needs,
It is achieved thereby that between subway tunnel and railway main track engineering truck smoothly operation.
The framework composition includes the curb girder of two interval setpoint distances, and curb girder end is attached by end carriage, two
Crossbeam is arranged between curb girder to be attached, day character form structure is so formed, and framework rigidity is strong, compared with traditional framework, eliminates
Longitudinal girder construction of crossbeam both sides, simple structure, it is easy to safeguard；Brake lever is connected with the brake lever seat on crossbeam with bearing pin
Connect.
Fixed braking flap seat on the crossbeam, braking flap seat is connected with brake clamp unit, and brake clamp unit passes through lock
Piece coordinates with described brake disc, and disc brake apparatus include disc braking cylinder, and brake clamp unit is disc braking cylinder, brake lining
The synthesis of support, brake lining and lever, piston rod stretches out in disc braking cylinder, promotes leverage in brake lining, brake plate support, and braking
On disk, brake force is produced, a disc braking cylinder is fixed at each wheel；Elastic side bearing composition is installed on the crossbeam,
Center bearing is set on crossbeam, and center bearing is used to be connected with vehicle body bottom frame.
The brake clamp unit hangs and realizes three point attachment with braking flap seat by ball pivot rubber nodal point and two brake plate supports.
Two brake plate supports are hung at the both sides of crossbeam, and brake plate support is hung for fixing brake lining.
Using disc brake, braking ratio is improve, when vehicle is braked on line of torsion, change ramp and ramp, wheel
Axle is nodded with respect to bogie frame, and three-point suspension formula brake clamp unit can be reversed by ball pivot rubber nodal point and adapt to corresponding inclined
Turn, be not in the phenomenon of brake lining and the abrasion of brake disc local.
An outer coil spring is respectively provided with the both sides of axle box composition, the top of outer coil spring is provided with spring compressor composition,
Spring compressor composition connection suspension ring, suspension ring are connected with drawing strickle guide composition, and drawing strickle guide composition is welded in the bottom of the curb girder, and drawing strickle guide composition is used
In fixed axle box hanging device.
Holder is provided between the spring compressor composition and axle box composition, wearing plate is welded with axle box composition, in vehicle
During vibration, friction between holder and wearing plate produces the frictional resistance of decay vibration；Using axle box Suspension Technique, axle box upper end is adopted
With single outer coil spring, empty and load camber of spring is big, improves the vertical dynamics performance of vehicle；Both linear running had been ensure that
Stability, meets curve passing through by performance again.
The checking cylinder composition is fixed with described crossbeam.
Composite braking system bogie also includes weighing device, and weighing device is constituted including weighing valve, and weighing device is adjusted
Brake block pressure, meets the needs of empty and load braking, and weighing valve composition upper end is connected with curb girder, and lower end connects with outer coil spring
Connect.
The brake-shoe brake device is also constituted including suspension rod, and suspension rod is constituted and is connected with the brake shoe flap seat on crossbeam.
The checking cylinder composition is connected with car body air pipe line.
The present invention has advantages below：
1) framework of the present invention consists of a day character form structure, and framework rigidity is strong, compared with conventional bogie, simplifies brake hanging
Seat, eliminates the braking longitudinal direction girder construction of complexity, and on the premise of meeting intensity, deadweight is greatly reduced.
2) using axle box Suspension Technique, axle box upper end adopts single outer coil spring, and empty and load camber of spring is big, improves car
Vertical dynamics performance.
3) disc brake brake force is big, is to overhaul to use to bring while reducing the abrasion between substantial amounts of pin, set
Convenience；Modular brake-shoe brake device compact conformation, retardation efficiency is high, there is provided while partial brake load, serves and steps on
The effect of face sweeper, improves the adhesion coefficient between wheel track, so as to improve braking ability；Using composite braking system, meet
The requirement of thermic load is braked under big axle weight, high deceleration.
4) weighing device is adopted, brake block pressure is adjusted, the needs of empty and load braking are met；Can pass through on railway main track
Brake valve on vehicle adjusts air pressure or closing unit formula brake-shoe brake device to meet the operation of railway main track engineering truck
Needs, it is achieved thereby that between subway tunnel and railway main track engineering truck smoothly operation.
5) by the setting of present configuration, bogie is applied to subway tunnel and railway main track engineering truck.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of framework composition of the present invention；
Fig. 3 is structural representation of the present invention wheel to composition；
Fig. 4 is the structural representation of axle box hanging device of the present invention；
Fig. 5 is the structural representation of disc brake of the present invention；
Fig. 6 is the structural representation of invention unit formula brake-shoe brake device；
Fig. 7 is the structural representation of weighing device of the present invention.
In figure：1 framework composition, 2 wheels are to composition, 3 axle box hanging devices, 4 disc brakes, 5 modular Block brakes
Device, 6 weighing devices, 7 curb girders, 8 crossbeams, 9 end carriages, 10 braking flap seats, 11 elastic side bearings composition, 12 drawing strickle guides composition, 13 brake shoes
Flap seat, 14 brake lever seats, 15 center bearings, 16 axletrees, 17 wheels, 18 brake discs, 19 axle boxes composition, 20 holders, 21 spring compressors
Composition, 22 suspension ring, 23 outer coil springs, 24 brake clamp units, 25 ball pivot rubber nodal points, 26 brake plate supports hang, 27 brake head connecting rods,
28 checking cylinders composition, 29 brake head levers, 30 brake levers, 31 brake heads, 32 brake shoes, 33 suspension rods composition.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description.
Fig. 1 show the structural representation of the present invention.
Composite braking system bogie of the present invention includes framework composition 1, wheel to composition 2, axle box hanging device 3, dish type system
Dynamic device 4 and modular brake-shoe brake device 5.
Fig. 2 show the structural representation of framework composition of the present invention.
Framework composition 1 is the day character form structure being spliced by curb girder 7, the 9 groups of welderings of crossbeam 8 and end carriage, framework rigidity
By force, simple structure, it is easy to safeguard.
Welding braking flap seat 10 on the crossbeam 8, braking flap seat 10 is connected with disc brake 4；Pacify on the crossbeam 8
Equipped with elastic side bearing composition 11, and center bearing 15 is welded, center bearing 15 is connected with vehicle body bottom frame；Weld on the crossbeam 8
Brake shoe flap seat 13 and brake lever seat 14, both connection unit formula brake-shoe brake device 5；The bottom of curb girder 7 of the framework composition 1
End welding drawing strickle guide composition 12, axle box hanging device 3 is connected by drawing strickle guide composition 12 with framework composition 1, and framework composition 1 passes through axle box
Suspension arrangement 3 is seated two-wheeled to constituting on 2.
Fig. 3 show structural representation of the present invention wheel to composition.
The wheel includes axletree 16, wheel 17 and brake disc 18 to composition 2, and the wheel 17 and brake disc 18 are arranged on car
On axle 16, with axletree 16 for an entirety in the form of interference fit；The two ends of axletree 16 and the axle of axle box hanging device 3
Case composition 19 is connected.
Fig. 4 show the structural representation of axle box hanging device of the present invention.
The axle box hanging device 3 includes axle box composition 19, and axle box constitutes 19 both sides and is respectively provided with single outer coil spring 23, institute
The top for stating outer coil spring 23 is provided with spring compressor composition 21, and spring compressor composition 21 connects suspension ring 22, and axle box hanging device 3 is by hanging
Ring 22 is connected with drawing strickle guide composition 12；Holder 20 is provided between the spring compressor composition 21 and axle box composition 19.During Vehicular vibration, top
Friction between the wearing plate welded on son 20 and axle box composition 19 produces the frictional resistance of decay vibration.Skill is hung using axle box
Art, axle box upper end adopts single outer coil spring 23, and empty and load camber of spring is big, improves the vertical dynamics performance of vehicle；Both
The stability of linear running is ensure that, curve passing through is met again by performance.
Fig. 5 show the structural representation of disc brake of the present invention.
The disc brake 4 includes brake clamp unit 24 and loaded on the brake disc 18 on axletree 16, brake clamp
Unit 24 hangs 26 with the braking three point attachment of flap seat 10 by ball pivot rubber nodal point 25 and two brake plate supports.Filled using disc braking
Put, improve braking ratio, when vehicle is braked on line of torsion, change ramp and ramp, wheel shaft is nodded with respect to bogie frame, three
Point suspension type brake clamp unit can be reversed by ball pivot rubber nodal point and adapt to corresponding deflection, be not in brake lining and brake disc office
The phenomenon of portion's abrasion.
Disc brake 4 is directly connected by flexible pipe composition with the air pipe line of car body, car body auxiliary reservoir pressure air
The checking cylinder of disc brake 4 is directly entered, brake cylinder piston rod stretches out and acts in brake lining and brake disc 18, produces braking
Power.
Fig. 6 is the structural representation of invention unit formula brake-shoe brake device；
The modular brake-shoe brake device 5 is arranged in the inner side of bogie wheel 17, and modular brake-shoe brake device 5 includes
Brake head connecting rod 27, checking cylinder composition 28, brake head lever 29, brake lever 30, brake head 31, brake shoe 32 and suspension rod composition
33；Brake head connecting rod 27 is parallel to each other with axletree 16, and the brake-shoe brake device 5 of left and right wheelses shares a brake head connecting rod 27；
Checking cylinder constitutes 28 two ends connection brake lever 30 and is bolted with crossbeam 8；Braking on brake lever 30 and crossbeam 8
Lever seat 14 is with bearing pin connection；Suspension rod composition 33 is connected with the brake shoe flap seat 13 on crossbeam 8；Two pieces are assembled on single brake head 31
Brake shoe 32.Modular brake-shoe brake device compact conformation, retardation efficiency is high, there is provided while partial brake load, serves and steps on
The effect of face sweeper, improves the adhesion coefficient between wheel track, so as to improve braking ability.
Modular brake-shoe brake device 5 is connected by two checking cylinder compositions 28 with car body air pipe line, and pressure air is made
After checking cylinder composition 28, brake piston stretches out and promotes former and later two brake levers 30, and the connection brake head of brake lever 30 connects
Bar 27, the connection of brake head connecting rod 27 brake head lever 29 promotes brake head 31 and brake shoe 32 to recline wheel 17, produces braking pressure
Power.
Fig. 7 is the structural representation of weighing device of the present invention.
The weighing device 6 includes weighing valve composition 34, air inlet pipe 35, escaping pipe 36, for fixing air inlet pipe 35, outlet
The arm boatswain chair 37 of pipe 36, arm flap seat 38；Weighing valve constitutes 34 upper ends and the bolt connection of curb girder 7, lower end and outer coil spring 23
Connection.Using weighing device 6, brake block pressure is adjusted, meet the needs of empty and load braking.
Bogie adopts composite braking device, meets the requirement that thermic load is braked under big axle weight, high deceleration, meets subway
Tunnel braking is frequent, the damped condition that thermic load is high；Air pressure or pass are adjusted by the brake valve on vehicle on railway main track
Close modular brake-shoe brake device to meet the needs of railway main track engineering truck operation, it is achieved thereby that subway tunnel and railway
The smoothly operation of engineering truck between main track.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to embodiment will be apparent for those skilled in the art, as defined herein general
Principle can in other embodiments be realized without departing from the spirit or scope of the present invention, is not described in detail
The part presented with partial enlargement, is prior art, and here is not repeated.Therefore, the present invention is not intended to be limited to herein
These shown embodiments, and it is to fit to the most wide scope consistent with principles disclosed herein and feature.
Claims (10)
1. a kind of composite braking system bogie, it is characterised in that include：
Framework is constituted, and framework composition is in day character form structure；
Axle box hanging device, axle box hanging device connection framework, axle box hanging device is constituted including axle box；
To composition, take turns includes axletree to wheel to composition, fixing vehicle wheel on axletree, and the two ends of axletree are connected with axle box composition；
Disc brake apparatus, disc brake apparatus include brake disc, and brake disc is on axletree and located at wheel inner side；
Brake-shoe brake device, brake-shoe brake device includes brake head connecting rod, and the two ends of brake head connecting rod respectively arrange a checking cylinder group
Both sides into, checking cylinder composition respectively be connecteds with a brake lever, and brake lever upper end constitutes with framework and is connected, lower end and brake head
Connecting rod is fixed, and brake head connecting rod is connected with brake head lever, and brake head lever is located at the outside of brake lever, and brake head lever
Be connected equipped with the brake head of brake shoe, during braking, brake head connecting rod promotes brake head and brake shoe to recline wheel, produces braking and presses
Power.
2. a kind of composite braking system bogie as claimed in claim 1, it is characterised in that the framework composition includes two
The curb girder of interval setpoint distance, curb girder end is attached by end carriage, crossbeam is arranged between two curb girders and is attached.
3. a kind of composite braking system bogie as claimed in claim 2, it is characterised in that fix brake hanging on the crossbeam
Seat, braking flap seat is connected with brake clamp unit, and disc brake apparatus include disc braking cylinder, and piston rod is stretched in disc braking cylinder
Go out to act in brake lining and brake disc, produce brake force.
4. a kind of composite braking system bogie as claimed in claim 3, it is characterised in that the brake clamp unit passes through
Ball pivot rubber nodal point and two brake plate supports hang and realize three point attachment with braking flap seat, and brake plate support hangs to be fixed with brake lining.
5. a kind of composite braking system bogie as claimed in claim 2, it is characterised in that in the both sides of axle box composition
An outer coil spring is respectively provided with, the top of outer coil spring is provided with spring compressor composition, spring compressor composition connection suspension ring, suspension ring and drawing strickle guide
Composition connection, drawing strickle guide composition is welded in the bottom of the curb girder.
6. a kind of composite braking system bogie as claimed in claim 5, it is characterised in that the spring compressor composition and axle box
Holder is provided between composition, on axle box composition wearing plate is welded with, in Vehicular vibration, friction between holder and wearing plate is produced
The frictional resistance of raw decay vibration.
7. a kind of composite braking system bogie as claimed in claim 2, it is characterised in that the checking cylinder composition with it is described
Crossbeam fix.
8. a kind of composite braking system bogie as claimed in claim 5, it is characterised in that also including weighing device, weigh
Device is constituted including weighing valve, and weighing valve composition upper end is connected with curb girder, and lower end is connected with outer coil spring.
9. a kind of composite braking system bogie as claimed in claim 2, it is characterised in that the brake-shoe brake device is also wrapped
Suspension rod composition is included, suspension rod is constituted and is connected with the brake shoe flap seat on crossbeam；
Further, the checking cylinder composition is connected with car body air pipe line.
10. it is a kind of suitable for subway tunnel and/or the engineering truck of subway main track, it is characterised in that to include such as claim 1-9
Any one of a kind of composite braking system bogie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710024276.7A CN106627649B (en) | 2017-01-13 | 2017-01-13 | A kind of composite braking system bogie and engineering truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710024276.7A CN106627649B (en) | 2017-01-13 | 2017-01-13 | A kind of composite braking system bogie and engineering truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106627649A true CN106627649A (en) | 2017-05-10 |
| CN106627649B CN106627649B (en) | 2019-02-01 |
Family
ID=58842860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710024276.7A Active CN106627649B (en) | 2017-01-13 | 2017-01-13 | A kind of composite braking system bogie and engineering truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106627649B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109109896A (en) * | 2018-09-07 | 2019-01-01 | 中车山东机车车辆有限公司 | A kind of subway engineering vehicle novel steering frame |
| CN111267820A (en) * | 2020-02-26 | 2020-06-12 | 中车齐齐哈尔车辆有限公司 | Dynamic performance test system for foundation brake device |
| CN114670887A (en) * | 2022-04-12 | 2022-06-28 | 中车眉山车辆有限公司 | Framework suitable for from electricity generation railway freight car bogie |
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| US2673623A (en) * | 1951-04-04 | 1954-03-30 | Budd Co | Disk brake unit for association with clasp brake trucks |
| CH545714A (en) * | 1971-10-20 | 1974-02-15 | ||
| EP0749882A2 (en) * | 1995-06-23 | 1996-12-27 | Fiat-Sig Schienenfahrzeuge Ag | Suspension device for brake units of railway vehicles |
| CN200945865Y (en) * | 2006-07-19 | 2007-09-12 | 中国南车集团眉山车辆厂 | Fast railway freight-car turning bracket |
| CN203358608U (en) * | 2013-07-22 | 2013-12-25 | 济南轨道交通装备有限责任公司 | Low-power radial welding bogie |
| CN104470784A (en) * | 2011-12-27 | 2015-03-25 | 西屋公司 | Integrated bogie brake and slack adjuster for the use with said integrated bogie brake |
| CN105416336A (en) * | 2015-12-24 | 2016-03-23 | 南车二七车辆有限公司 | Foundation braking device for railway wagon bogie |
| CN206394644U (en) * | 2017-01-13 | 2017-08-11 | 中车山东机车车辆有限公司 | A kind of composite braking system bogie and engineering truck |
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2017
- 2017-01-13 CN CN201710024276.7A patent/CN106627649B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2673623A (en) * | 1951-04-04 | 1954-03-30 | Budd Co | Disk brake unit for association with clasp brake trucks |
| CH545714A (en) * | 1971-10-20 | 1974-02-15 | ||
| EP0749882A2 (en) * | 1995-06-23 | 1996-12-27 | Fiat-Sig Schienenfahrzeuge Ag | Suspension device for brake units of railway vehicles |
| CN200945865Y (en) * | 2006-07-19 | 2007-09-12 | 中国南车集团眉山车辆厂 | Fast railway freight-car turning bracket |
| CN104470784A (en) * | 2011-12-27 | 2015-03-25 | 西屋公司 | Integrated bogie brake and slack adjuster for the use with said integrated bogie brake |
| CN203358608U (en) * | 2013-07-22 | 2013-12-25 | 济南轨道交通装备有限责任公司 | Low-power radial welding bogie |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109109896A (en) * | 2018-09-07 | 2019-01-01 | 中车山东机车车辆有限公司 | A kind of subway engineering vehicle novel steering frame |
| CN111267820A (en) * | 2020-02-26 | 2020-06-12 | 中车齐齐哈尔车辆有限公司 | Dynamic performance test system for foundation brake device |
| CN114670887A (en) * | 2022-04-12 | 2022-06-28 | 中车眉山车辆有限公司 | Framework suitable for from electricity generation railway freight car bogie |
| CN114670887B (en) * | 2022-04-12 | 2024-04-26 | 中车眉山车辆有限公司 | Framework suitable for self-generating railway wagon bogie |
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| Publication number | Publication date |
|---|---|
| CN106627649B (en) | 2019-02-01 |
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