CN105084256B - A kind of hand hydraulic carrier control crank - Google Patents
A kind of hand hydraulic carrier control crank Download PDFInfo
- Publication number
- CN105084256B CN105084256B CN201510547094.9A CN201510547094A CN105084256B CN 105084256 B CN105084256 B CN 105084256B CN 201510547094 A CN201510547094 A CN 201510547094A CN 105084256 B CN105084256 B CN 105084256B
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- CN
- China
- Prior art keywords
- rod
- secter pat
- pump core
- pump
- control crank
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- Expired - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07559—Stabilizing means
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
- Handcart (AREA)
Abstract
The invention discloses a kind of hand hydraulic carrier control crank, the bail handle on the body of rod is connected to including a body of rod and one, it is provided with the body of rod and pinches handle, pinch being connected with the hydraulic lifting apparatus of manual transport trolley by actuated element, the body of rod is connected with the pump housing of hydraulic lifting apparatus by bearing pin；The body of rod is made up of strut portion and swing part, and strut portion is flexibly connected with swing part；Strut portion both sides otic placode is connected with the pump housing by bearing pin；Swing part has the master and slave moving part for swinging the body of rod and cam mechanism being constituted with the pump core for swinging the secter pat that body of rod lower end fixes as one, the secter pat and the pump housing；In cam mechanism, secter pat swings, correspond to pump core move downward and fuel feeding or upwards motion and oil suction.Present invention reduces mover hoisting time, while operation amplitude is less.
Description
Technical field
The present invention relates to a kind of manual transport trolley, more particularly to a kind of hand hydraulic carrier.
Background technology
Manual type mover is widely used in factory floor, warehouse and logistics as a kind of raising handbarrow, existing
That what is commonly used in having manual transport trolley has a kind of hand hydraulic carrier, and the vehicle frame of this hand hydraulic carrier is because including one group
The load platform of pallet fork form, therefore typically it is also referred to as manual pallet trucks.The structure of this mover also includes manipulating
Handle, oil pump and its executive component hydraulic cylinder that power is provided, with the piston rod upper end of hydraulic cylinder support the rising of pallet fork with
Decline.The hydraulic power system of oil pump and hydraulic cylinder as mover, is the most key ingredient of hand hydraulic carrier,
And control crank is used as control operation element, its tie as operator and hydraulic carrier, is that oil pump feed transmission is initial
Power.It is provided with control crank in existing hand hydraulic carrier and pinches handle, it has rising, neutral gear and declines three shelves
Position, when being intended to raising mover, should will pinch first supreme liter of gear of adjustment, constantly press control crank, so that the pump core of oil pump
Pump and complete oil suction and fuel feeding, certain altitude is risen to so as to the pallet fork of mover is risen.During use, even if pin
When relatively light or weight is not sufficiently large to the goods weight of lifting, remain on needs constantly reciprocal pressing handle, make hydraulic oil from
Oil pump is constantly entered in hydraulic cylinder rodless cavity, promotes hydraulic cylinder piston rod to move upwards, therefore existing hand hydraulic carrier rises
Rise relatively slow, be to improve the efficiency of loading and unloading, the average lifting velocity of existing manual transport trolley should be increased, that is, shorten existing hand-hydraulic
The hoisting time of mover.
The content of the invention
Present invention solves the technical problem that being, there is provided a kind of control crank of hand hydraulic carrier, mover is enable
Enough fast lifting goods, improve the efficiency of loading and unloading.
The present invention solves above-mentioned technical problem and employs the following technical solutions to realize：A kind of hand hydraulic carrier manipulates handss
Handle, including a body of rod and a bail handle being connected on the body of rod, are provided with the body of rod and pinch handle, described to pinch by transmission
Element is connected with the hydraulic lifting apparatus of manual transport trolley, and the body of rod is connected with the pump housing of hydraulic lifting apparatus by bearing pin；
The body of rod is made up of strut portion and swing part, and the strut portion is flexibly connected with swing part, and both mutually can turn
It is dynamic；Strut portion both sides otic placode is connected with the pump housing by the bearing pin；The swing part have swing the body of rod and
The secter pat fixed as one with swing body of rod lower end, the secter pat constitute the master and slave of cam mechanism with the pump core of the pump housing
Moving part；In the cam mechanism, secter pat is rocked to its bottom face and pump core top end face wedging to left or right and is integrally formed and two
End force makes the spring-compressed in pump core, correspond to pump core and moves downward in oil condition；The secter pat is put to left or right
Move to the pressure of its bottom face and pump core top end face be not more than the acting force of the spring in pump core when, correspond to pump core upwards at motion
In oil suction state.
In above-mentioned technical proposal, due to adopting the body of rod being made up of strut portion and swing part, replace existing whole
The body formula control crank body of rod, swing part can be rotated relative to strut portion, and the secter pat of swing part can constitute cam with pump core
Principal and subordinate's moving part of mechanism, secter pat are rocked to the pump core top end face wedging of its bottom face and the pump housing to the left or to the right, and can make pump
Core is moved downward, and completes fuel feeding, so that the piston rod of hydraulic cylinder is moved upwards；When secter pat is rocked to its bottom to left or right
When in face and the pump housing, the pressure of pump core top end face is not more than the acting force of the spring in pump core, pump core can be moved upwards and be completed oil suction.
So, back and forth carry out swinging for secter pat, you can complete fuel feeding and the oil suction of the pump housing, without control crank is back and forth pressed
Pressure, shortens mover hoisting time, and the amplitude for swinging more back and forth presses little, and it is more convenient to operate.
Used as a kind of preferred version of manual transport trolley control crank of the present invention, the strut portion is around the opposite pump core of bearing pin
During rotation, the secter pat bottom face can correspond to pump core and move downward with pump core top end face wedging.In above-mentioned setting,
When the weight of the goods for raising is larger, then the secter pat that swings is accomplished by larger active force, can now pass through
Pressing swings the body of rod makes strut portion and secter pat rotate to pump core, and secter pat bottom face is compressed with pump core top end face, is back and forth pressed
Pressure swings the body of rod, can complete fuel feeding and the oil suction of the pump housing, make mover obtain raising.
As the improvement to hand hydraulic carrier control crank of the present invention or above-mentioned preferred version, have on the secter pat
There is plural segmental arc.This set, is swung once to the left or to the right, you can complete secter pat and pump core at least twice with
On pressing, i.e., at least twice more than oil condition so that mover raising time shorten.
Used as the further improvement to above-mentioned improvement project, on the secter pat, each segmental arc is V-shaped by its both sides
Smooth indentation connects.This set, makes secter pat bottom face less with the contact impact of pump core top end face, also rises to pump core and stays
Go out the more sufficient time, make pump housing oil suction more abundant.
As the further improvement to above-mentioned improvement project, with the odd number segmental arc of more than three on the secter pat
When, the radius of curvature and arc length of medial arc section is little compared with other segmental arcs.Due in middle segmental arc and pump core top end face
Tangent contact, the effect of segmental arc swings moves can not pump core, above-mentioned this set, make with medial arc section close to arc
Section quickly can be contacted with pump core；According to pressing handle mode, this medial arc section can be closely connect with pump core top end face
Touch.
As improving again to such scheme, the upper limit in shoe between the swing part and strut portion, is set respectively
Block and lower position block；When the secter pat is rocked to high order end or low order end, the upper limit position block and lower position block have left end or
Right-hand member mating surface.This set, it is reliable spacing when secter pat is swung to the left or to the right, will not make secter pat completely and pump
Core departs from, and causes secter pat left or right to answer back to pump core outer peripheral face and contacts and cannot reset.
Description of the drawings
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail, wherein：
Fig. 1 is the structural representation of existing hand hydraulic carrier control crank.
Fig. 2 is the structural representation of hand hydraulic carrier control crank of the present invention.
Fig. 3 is the cycle of operation state diagram of operation handle partial structurtes in Fig. 2.
Fig. 4 is the standoff features schematic diagram of hand hydraulic carrier control crank of the present invention.
Fig. 5 is the Local map of another kind of body of rod of hand hydraulic carrier control crank of the present invention.
1. bail handle, 2. body of rod, 3. pinch roller, 4. resilient key, 5. bearing pin, 6. pump housing frame, 7. pump core, 8. spring in Fig. 1
11. pin shaft hole of cap 9. spring, 10. hydraulic cylinder, 12. backplate 13. pinches handle.
In Fig. 2,1. bail handle 2. swings 3. secter pat 3a. segmental arc 3b. smooth indentations of the body of rod, 4. resilient key
5. 6. pump housing frame of bearing pin, 7. pump core, 8. spring compressor, 9. spring, 10. hydraulic cylinder, 11. pin shaft hole, 12. otic placode 13. pinches handle
14. depression bars.
In Fig. 4,15. upper limit position block 15a. left sides 15a. right sides, 16. lower position block 16a. left side 16b. are right
End face.
3. secter pat 3a. segmental arc 3b. smooth indentations in Fig. 5.
Specific embodiment
Improvement done by hinge structure for a better understanding of the present invention, in the specific embodiment to the present invention
Before being described in detail, accompanying drawing is combined to the prior art that background section is previously mentioned first and is illustrated.
Existing hand hydraulic carrier control crank shown in Fig. 1, it includes a body of rod 2 and a bail handle 1, ring
Shape handle 1 is arranged on the body of rod 2, and which is easy to operator to the pressing of the body of rod 2 and moving integrally for mover.The body of rod 2 is near upper
End part is also equipped with pinching 13, and this is pinched has three gears 13, be respectively rise, neutral and decline, mover carried out
When rising, pinch and supreme liter of gear should be adjusted 13.The body of rod 2 is welded as a whole with backplate 12, and bearing pin 5 is through the pin shaft hole on backplate 12
Backplate 12 and pump housing frame 6 are attached by 11, and resilient key 4 is through in the hole at 5 two ends of bearing pin, and bearing pin 5 is fixed.It is fixedly mounted on
The pump housing on pump housing frame 6, is fixed with spring compressor 8 in its pump core 7, spring 9 is fixed between spring compressor 8 and pump housing frame 6, hydraulic cylinder
10 piston rod supports the load platform of mover.It is additionally provided with pinch roller 3 on backplate 12, presses the body of rod 2,3 outer peripheral face of pinch roller can be with
7 top end face of pump core is contacted.
When mover raising is carried out, pinch 13 in gear is risen, operator presses down on ring-shaped handle 1 and makes the body of rod 2
Backplate 12 is driven to rotate around bearing pin 5, pinch roller 3 will be contacted with 7 top end face of pump core.With the body of rod 2 as lever, bearing pin 5 be fulcrum, Jing power
Arm amplifies, and hydraulic oil is entered in the rodless cavity of hydraulic cylinder 10, completes pump housing fuel feeding, and mover gets a promotion；It is lifted up
Ring-shaped handle 1 and the body of rod 2, pinch roller 3 are eliminated with the lower pressure of 7 top end face of pump core, and pump core 7 is moved in the presence of spring 9 upwards,
Complete pump housing oil suction.Load platform to make mover rises and rises to certain altitude, needs back and forth to press and lift ring-shaped handle more than 1
Secondary, this causes hoisting time longer；Although operation is more laborsaving, as the body of rod 2 is general longer, back and forth presses and lift the body of rod
2 need larger work space, and the operation amplitude for pressing and lifting the body of rod 2 is also larger.
Embodiments of the present invention are aiming at control crank of the prior art makes can not mover fast lifting
Improvement.Below this specific embodiment is explained in detail.For sake of convenience, hereinafter alleged "left", "right",
The left and right of " bottom ", " top " and accompanying drawing itself, bottom, top orientation are consistent, but are not that the structure to the present invention plays restriction
Effect.
As shown in Fig. 2 the body of rod of the control crank of the present invention includes strut portion and swing part, wherein strut portion by
The otic placode 12 of depression bar 14 and its both sides is constituted, and pin shaft hole 11 is provided with otic placode 12, and otic placode 12 is installed by bearing pin 5 through pin shaft hole 11
On pump housing frame 6, and it is fixed by resilient key 4；Swing part swings the body of rod 2 by the body of rod 2 is swung and secter pat 3 is constituted
Bail handle 1 is installed near upper part and is pinched 13, lower end is fixed as one with secter pat 3；Depression bar 14 leads to the body of rod 2 is swung
Cross rotation pair to be actively coupled, both can keep mutually rotation.Pinch and there are three gears 13, be respectively rise, neutral gear and decline,
Pinch and be connected with hydraulic lifting apparatus by actuated element 13, hydraulic lifting apparatus here are 10 groups of the pump housing and hydraulic cylinder
Into hydraulic power system.Bail handle 1 be easy to operator the body of rod is operable to complete the rising of mover, movement and under
Drop.
The generally fan shape of secter pat 3 as shown in Fig. 2, Fig. 5, its fan-shaped flared end are made up of segmental arc 3a, due to
At least there is on secter pat 3 two segmental arc 3a, adjacent segmental arc 3a to be connected by V-shaped smooth indentation 3b.When secter pat 3
When above with the odd number segmental arc 3a of more than three, the radius of curvature and arc length in middle segmental arc 3a is compared with other segmental arcs
3a is little, so enable with medial arc section 3a close to segmental arc 3a quickly contact with pump core 7；And when using pressing handle
During mode, this medial arc section 3a can be in close contact with 7 top end face of pump core.
When the relative mover nominal load capacity of goods weight relatively light or its weight for needing raising and carry is less,
To pinch 13 supreme liter of gears of adjustment, operator holds bail handle 1 and applies active force to the left or to the right to which, makes swing
The body of rod 2 is swung to the left or to the right around depression bar 14, when secter pat 3 constitutes cam mechanism, the cam mechanism with pump core 7 and pump housing frame 6
Driving link be secter pat 3, driven member be pump core 7.When the top end face wedge of the bottom face and pump core 7 of the segmental arc 3a of secter pat 3
When being tightly integrally formed, continue to swing secter pat 3 to the left or to the right, its certain contact pump core 7 simultaneously makes what pump core 7 was moved downward at first
The hydraulic oil made in the pump housing is entered hydraulic cylinder 10 so as to which piston rod is moved upwards, and the load platform of mover is obtained by segmental arc 3a
To raising；Be fixed on spring compressor 8 in pump core 7 will compression spring 9, make the spring 9 between spring compressor 8 and pump housing frame 6
Accumulation of energy；When this makes the closest approach of segmental arc 3a that pump core 7 moves downward from its relative rotation move to the left or to the right at first
During solstics to its relative rotation, continuation is swung to the left or to the right, the pressure of segmental arc 3a bottom faces and 7 top end face of pump core
Power is insufficient to allow pump core 7 to continue to move downward, and spring 9 releases energy, makes pump core 7 start to move upwards, in oil suction state, pump core
7 when going upward to extreme position, and segmental arc 3a moves to another closest approach at its relative rotation.Continuation is put to the left or to the right
It is dynamic, make adjacent segmental arc 3a start to act on pump core 7.
As shown in figure 3, when secter pat 3 is rocked to high order end or low order end to the left or to the right, can with backswing, i.e., to
The right side swings to the left.So, operator only need to back and forth swing to bail handle 1, you can complete the raising of mover.Due to
Secter pat 3 has at least two segmental arc 3a, and swing the fuel feeding that more than four times are completed by once resetting afterwards, and mover can
Obtain fast lifting.
Due to the V-shaped smooth indentation in the coupling part of adjacent segmental arc 3a, when 1 fast speed belt movable pendulum lever body of bail handle
2 and secter pat 3 swing when, the impact between secter pat 3 and pump core 7 can be reduced, and pump core 7 can be made to have on time enough
Rise and complete oil suction action.
As shown in figure 4, upper limit position block 15 is fixed on the swing body of rod 2, lower position block 26 is fixed on depression bar 14, upper limit
Block 15 and lower position block 16 are in shoe.When secter pat 3 is rocked to the smooth indentation 3b of close high order end, the upper limit position block 15
Left side 15a contacts to form mating surface with the left side 16a of lower position block 16；Secter pat 3 is rocked near the smooth of low order end
During depression 3b, the right side 15b of the upper limit position block 15 contacts to form mating surface with the right side 16b of lower position block 16.Due to pendulum
Lever body 2 is rotated relative to depression bar 14, during the formation mating surface of upper limit position block 15 and lower position block 16, is to swing 2 relative pressure of the body of rod
The rotation limit position of bar 14, can so avoid 3 high order end of secter pat or low order end from completely disengaging from pump core 7, not result in sector
3 or so end of block and 7 outer peripheral face of pump core are answered back to and secter pat 3 occur and cannot reset phenomenon.
When the goods weight for needing raising is larger or which is close to mover payload ratings, will pinch 13 adjustment supreme
Gear is risen, the oscillatory forces that operator holds bail handle 1 and needs applying larger swing secter pat 3, now can be to bail handle 1
Apply downward active force, the swing body of rod 2 and secter pat 3 is rotated to pump core around bearing pin 5 together with depression bar 14,3 bottom of secter pat
End face and 7 top end face wedging of pump core, continue to press down on bail handle 1, move downward pump core 7, complete fuel feeding, and mover is obtained
To raising.As the fulcrum of this pressing operation is bearing pin 5, lever arm of force is increased, therefore it is more laborsaving to operate.Fuel feeding
After the completion of, lifting bail handle 1, pump core 7 are moved under the effect of spring 9 upwards, complete oil suction.Reciprocal pressing bail handle 1, makes
3 bottom face of secter pat back and forth presses pump core 7, completes the raising of mover.
The control crank of the present invention can complete the raising of mover by swinging, and shorten while laborsaving
The time of liter, while operation amplitude is less, the requirement to working place is reduced.
Finally illustrate that the manual transport trolley control crank that above example is referred to is not limited to this case and is provided
Diagram.It will be understood by those within the art that, technical scheme can be modified or equivalent,
Without deviating from the objective and scope of technical solution of the present invention, which all should be covered in the middle of scope of the presently claimed invention.
Claims (6)
1. a kind of hand hydraulic carrier control crank, an including body of rod and a bail handle being connected on the body of rod, bar
It is provided with body and pinches handle, described to pinch being connected with the hydraulic lifting apparatus of manual transport trolley by actuated element, the body of rod leads to
Cross bearing pin to be connected with the pump housing of hydraulic lifting apparatus, it is characterised in that：The body of rod is made up of strut portion and swing part, institute
State strut portion to be flexibly connected with swing part, both mutually can rotate；Strut portion both sides otic placode passes through the bearing pin
It is connected with the pump housing；The swing part has the secter pat for swinging the body of rod and fixing as one with swing body of rod lower end, should
The pump core of secter pat and the pump housing constitutes the master and slave moving part of cam mechanism；In the cam mechanism, secter pat is put to left or right
Move to its bottom face and pump core top end face wedging and be integrally formed and spring-compressed that two ends surface pressure makes in pump core, correspond to pump core
Move downward in oil condition；The secter pat is rocked to its bottom face to left or right and is not more than pump with the pressure of pump core top end face
During acting force of the spring on core, correspond to pump core and moved in oil suction state upwards.
2. hand hydraulic carrier control crank according to claim 1, it is characterised in that：The strut portion is around bearing pin
When opposite pump core is rotated, the secter pat bottom face can correspond to pump core and move downward with pump core top end face wedging.
3. hand hydraulic carrier control crank according to claim 1 and 2, it is characterised in that：Have on the secter pat
There is plural segmental arc.
4. hand hydraulic carrier control crank according to claim 3, it is characterised in that：Each arc on the secter pat
Section is by the V-shaped smooth indentation connection in its both sides.
5. hand hydraulic carrier control crank according to claim 3, it is characterised in that：Have three on the secter pat
During the odd number segmental arc of the individual above, the radius of curvature and arc length of medial arc section is little compared with other segmental arcs.
6. the hand hydraulic carrier control crank according to any one of claim 1 to 5, it is characterised in that：The swing
The upper limit position block in shoe and lower position block are set respectively between part and strut portion；The secter pat is rocked to high order end or most
During right-hand member, the upper limit position block has left or right mating surface with lower position block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510547094.9A CN105084256B (en) | 2015-08-31 | 2015-08-31 | A kind of hand hydraulic carrier control crank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510547094.9A CN105084256B (en) | 2015-08-31 | 2015-08-31 | A kind of hand hydraulic carrier control crank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105084256A CN105084256A (en) | 2015-11-25 |
| CN105084256B true CN105084256B (en) | 2017-03-29 |
Family
ID=54565720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510547094.9A Expired - Fee Related CN105084256B (en) | 2015-08-31 | 2015-08-31 | A kind of hand hydraulic carrier control crank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105084256B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265352B (en) * | 2017-06-06 | 2019-12-31 | 上海电机学院 | Portable transfer trolley |
| CN108483346B (en) * | 2018-04-19 | 2023-08-11 | 浙江中力机械股份有限公司 | Full-automatic carrier |
| CN114014218B (en) * | 2021-11-03 | 2023-06-06 | 中国人民解放军96815部队 | Novel efficient manual carrier and optimal key parameter selection method thereof |
Citations (5)
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|---|---|---|---|---|
| CN2550281Y (en) * | 2002-07-02 | 2003-05-14 | 李文清 | Adjustable supporting board cart |
| JP2011020469A (en) * | 2009-07-13 | 2011-02-03 | Mazda Motor Corp | Parking device of transmission |
| CN203335166U (en) * | 2013-05-29 | 2013-12-11 | 长城汽车股份有限公司 | Variable valve lift mechanism of automobile engine air distribution system |
| CN203807075U (en) * | 2014-04-18 | 2014-09-03 | 宁波豪迈机械有限公司 | Mini electric carrying cart |
| CN204549956U (en) * | 2015-03-24 | 2015-08-12 | 中国人民解放军军事交通学院 | For the hand hydraulic carrier of moving vehicle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007003967A1 (en) * | 2006-02-22 | 2007-09-27 | Schaeffler Kg | Valve drive for an internal combustion engine has a cam follower with cam contact surface formed by a roller on hollow pivoting semi-circular bucket-like structure with a swinging-rod driven body to form the valve contacting surface |
| US7506781B2 (en) * | 2007-05-04 | 2009-03-24 | Roberts John G | Golf ball positioning dispenser for putting practice |
-
2015
- 2015-08-31 CN CN201510547094.9A patent/CN105084256B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2550281Y (en) * | 2002-07-02 | 2003-05-14 | 李文清 | Adjustable supporting board cart |
| JP2011020469A (en) * | 2009-07-13 | 2011-02-03 | Mazda Motor Corp | Parking device of transmission |
| CN203335166U (en) * | 2013-05-29 | 2013-12-11 | 长城汽车股份有限公司 | Variable valve lift mechanism of automobile engine air distribution system |
| CN203807075U (en) * | 2014-04-18 | 2014-09-03 | 宁波豪迈机械有限公司 | Mini electric carrying cart |
| CN204549956U (en) * | 2015-03-24 | 2015-08-12 | 中国人民解放军军事交通学院 | For the hand hydraulic carrier of moving vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105084256A (en) | 2015-11-25 |
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