CN107339416A - A kind of gearbox manual shift control valve - Google Patents
A kind of gearbox manual shift control valve Download PDFInfo
- Publication number
- CN107339416A CN107339416A CN201710561926.1A CN201710561926A CN107339416A CN 107339416 A CN107339416 A CN 107339416A CN 201710561926 A CN201710561926 A CN 201710561926A CN 107339416 A CN107339416 A CN 107339416A
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- China
- Prior art keywords
- valve rod
- oil duct
- rod assembly
- valve
- assembly
- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a kind of gearbox manual shift control valve, and it belongs to engineering machinery loading machine field.It is mainly including the upper valve body to cooperate and lower valve body, and the upper valve body is interior to ease up provided with pressure regulation valve rod assembly, cut-out valve rod assembly and rush valve rod assembly A, provided with gear valve rod assembly, advance, retrogressing valve rod assembly and buffering valve rod assembly B in lower valve body；Pressure regulation valve rod assembly is coordinated by oil duct c and oil duct T and cut-out valve rod assembly and gear valve rod assembly；Valve rod assembly is cut off by oil duct d with advancing, retreating valve rod assembly to coordinate；Advance, retrogressing valve rod assembly passes through oil duct e and buffering valve rod assembly A and coordinated；Advance, retrogressing valve rod assembly passes through oil duct h and buffering valve rod assembly B and coordinated.Simple in construction, good reliability of the invention, insensitive to transmission luboil cleanness, cost is cheap, cost-effective.Present invention is mainly used for gearbox.
Description
Technical field
The invention belongs to engineering machinery loading machine field, specifically, more particularly to a kind of manual shift control of gearbox
Valve processed.
Background technology
At present, loading machine gearbox, it is divided into two kinds of planetary transmission and fixed axle gearbox, its mode of shifting gears is different
In general walking machine, more than 3T loading machines are generally shifted gears using hydraulic power.According to the difference of its control mode of shifting gears, speed change
Control valve can be divided into automatically controlled gearshift control valve and manual shift control valve.Automatically controlled gearshift control valve has light, steering force of shifting gears
The advantage such as small.But there is also many inferior positions, automatically controlled gearshift control valve must Configuration Control Unit and electrically controlled manipulation bar, clutch uses
Paper-base friction wafer, cost are higher.Solenoid valve control oil circuit must be used in automatically controlled gearshift control valve, so the cleaning to transmission oil
Degree requires also higher；Further, since controlled using controller, be not easy to judge failure after going wrong, accessory cost also compared with
It is high.
The manual shift control valve that loading machine gearbox uses at present is broadly divided into two kinds, a kind of height that band individually manipulates,
Low-speed control bar, as 3T loading machine speed change valves there are " the first two is latter " three gears, after coordinating high low speed, become " two " after preceding four；
5T loading machine speed change valves have that " two " four gears, after coordinating high low speed, become " four " after preceding four after the first two.This control mode
Gearbox, it is necessary to which complete machine is stopped during if desired for high speed sport car, then change top gear into, then start sport car, this control
Mode reduces operating efficiency.Another, is that institute is functional to be integrated in speed Control valve assembly without high, low speed control stick
On, advancing 1,2,3,4 and retreats 1,2,3,4 structures, shares 6 clutches in gearbox, respectively 1,2,3,4 grade of clutch and
Advance, back clutch, the structure of this speed change valve is complex.
The content of the invention
It is an object of the invention to overcome drawbacks described above, there is provided a kind of gearbox manual shift control valve, the letter of its structure
Single, good reliability is insensitive to transmission luboil cleanness, and cost is cheap, cost-effective.
Described gearbox manual shift control valve, include the upper valve body and lower valve body of mutual cooperation, the upper valve body
It is interior to be provided with that pressure regulation valve rod assembly, cut-out valve rod assembly are gentle to rush valve rod assembly A, be provided with lower valve body gear valve rod assembly, advance,
Retreat valve rod assembly and buffering valve rod assembly B；Pressure regulation valve rod assembly passes through oil duct c and oil duct T and cut-out valve rod assembly and gear
Valve rod assembly coordinates；Valve rod assembly is cut off by oil duct d with advancing, retreating valve rod assembly to coordinate；Advance, retrogressing valve rod assembly leads to
Oil channel e coordinates with buffering valve rod assembly A；Advance, retrogressing valve rod assembly passes through oil duct h and buffering valve rod assembly B and coordinated.
Further, the pressure regulation valve rod assembly includes pressure regulation valve rod, spring I, plug screw I and cover plate, and pressure regulation valve rod passes through
Oil duct c, oil duct b and oil duct T, pressure regulation valve rod right side are connected with plug screw I by spring I, are connected on the left of pressure regulation valve rod with cover plate.
Further, the cut-out valve rod assembly includes cut-out valve rod, spring II and cut-out valve assembly, and cut-out valve rod passes through
Oil duct c, oil duct d and oil duct T, cut-out valve rod pass on left spring II and are connected with cover plate, with cutting off valve assembly on the right side of cut-out valve rod
Connection.
Further, the gear valve rod assembly includes gear valve rod, gear valve rod through oil duct c, oil duct 1, oil duct 2,
Oil duct 3, oil duct 4 and oil duct T, gear valve rod right-hand member are positioned by steel ball and spring IV, and gear valve rod left end passes through seal assembly
Sealing.
Further, the displacement range of the gear valve rod is 0~27mm.
Further, the advance, retrogressing valve rod assembly include the valve rod that advances, retreats, and advance, retrogressing valve rod pass through oil duct
H, oil duct d, oil duct e and oil duct T, advance, retrogressing valve rod right-hand member are positioned by steel ball and spring IV, advance, retreat valve rod left end
Sealed by seal assembly.
Further, the displacement range advanced, retreat valve rod is 0~18mm.
Further, the buffering valve rod assembly A is identical with buffering valve rod assembly B structure, includes buffering valve rod, buffering
Both sides are respectively equipped with oil duct f and oil duct g in valve rod, and buffering valve rod passes on left spring III and is connected with plug screw III, and buffering valve rod is right
Side is connected by the big spring and little spring of damper piston and mutual cooperation with plug screw VI；Buffer valve rod assembly A through oil duct A,
Oil duct T and oil duct e；Buffering valve rod assembly B passes through oil duct B, oil duct T and oil duct h.
Further, sealing gasket is provided between the upper valve body and lower valve body, upper valve body and lower valve body are fastened by bolts
Connection.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, it is of the invention simple in construction, by pulling gear valve rod and advancing, retrogressing valve rod teamwork, advance 1,2 is realized,
Switching between 3,4 grades and 1,2,3,4 grades of retrogressing, compared with traditional manual gearshift control valve, manipulate simpler；
2nd, upper valve body of the present invention and the Split type structure of lower valve body, casting technique is simple, and easy sand removal, cleannes are easy
Control, manufacture are more convenient；
3rd, cost advantage of the present invention is obvious, coordinates with annexes such as conventional gearbox clutch, controller and control sticks,
For cost compared with automatically controlled gearshift control valve, every can reduce by 8000 yuan.
Brief description of the drawings
Fig. 1 is the front view of the present invention；
Fig. 2 is the left view of the present invention；
Fig. 3 is the rearview of the present invention；
Fig. 4 is the upward view of the present invention；
Fig. 5 is Fig. 2 F-F to sectional view；
Fig. 6 is Fig. 2 E-E to sectional view；
Fig. 7 is the application principle figure of the present invention.
In figure, 1, cover plate；2nd, sealing gasket；3rd, pressure regulation valve rod；4th, spring base I；5th, spring I；6th, plug screw I；7th, sealing ring I；
8th, valve assembly is cut off；9th, plug screw III；10th, plug screw VI；11st, sealing ring III；12nd, big spring；13rd, little spring；14th, damper piston；
15th, valve rod is buffered；16th, spring III；17th, spring base III；18th, back-up ring；19th, valve rod is cut off；20th, spring II；21st, gear valve rod；
22nd, seal assembly；23rd, plug screw IV；24th, spring IV；25th, steel ball；26th, plug；27th, advance, retreat valve rod；28th, lower valve body；
29th, upper valve body；30th, speed change valve；31st, filter；32nd, torque-converters；33rd, overflow valve；34th, radiator；35th, gearbox fuel tank；36、
Manual shift control valve；Ith, pressure regulation valve rod assembly；IIth, valve rod assembly is cut off；IIIth, valve rod assembly A is buffered；IVth, gear valve rod group
Part；Vth, advance, retreat valve rod assembly；VIth, valve rod assembly B is buffered.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
As depicted in figs. 1 and 2, a kind of gearbox manual shift control valve, including the upper valve body 29 of mutual cooperation is with
Valve body 28, is provided with sealing gasket 2 between upper valve body 29 and lower valve body 28, upper valve body 29 and lower valve body 28 are bolted connection.
As shown in figure 5, pressure regulation valve rod assembly I, cut-out valve rod assembly II and buffering valve rod group are provided with the upper valve body 29
Part A III, the pressure regulation valve rod assembly I include pressure regulation valve rod 3, spring I 5, plug screw I 6 and cover plate 1, pressure regulation valve rod 3 through oil duct c,
Oil duct b and oil duct T, the right side of pressure regulation valve rod 3 are withstood on plug screw I 6 by the spring I 5 on spring base I 4, sealing ring I 7, pressure regulator valve
The left side of bar 3 spring I 5 in the presence of be adjacent to cover plate 1；
The cut-out valve rod assembly II includes cut-out valve rod 19, spring II 20 and cut-out valve assembly 8, and cut-out valve rod 19 passes through
Oil duct c, oil duct d and oil duct T, cut-out valve rod 19 pass on left spring II 20 and are connected with cover plate 1, and the right side of cut-out valve rod 19 is in spring
Under II 20 effects, it is attached on cut-out valve assembly 8；Transmission oil at oil duct c is through oil channel d.
As shown in fig. 6, gear valve rod assembly IV, advance are provided with the lower valve body 28, retreats valve rod assembly V and buffering
Valve rod assembly B VI；Gear valve rod assembly IV includes gear valve rod 21, and gear valve rod 21 passes through oil duct c, oil duct 1, oil duct 2, oil duct
3rd, oil duct 4 and oil duct T, the right side of gear valve rod 21 are positioned by steel ball 25 and spring IV 24, and spring IV 24 is withstood on plug screw IV 23,
The right-hand member of gear valve rod 21 is withstood on plug screw by plug 26；The left end of gear valve rod 21 is inside and outside by the sealed valve body of seal assembly 22
Passage；The displacement range of gear valve rod 21 is 0~27mm；
It is described advance, retreat valve rod assembly V include advance, retreat valve rod 27, advance, retreat valve rod 27 through oil duct h,
Oil duct d, oil duct e and oil duct T, advance, retreat the right side of valve rod 27 by steel ball 25 and the positioning of spring IV 24, advance, retreat valve rod
27 left ends pass through the inside and outside passage of the sealed valve body of seal assembly 22；Advance, the displacement range of retrogressing valve rod 27 is 0~18mm.
As shown in Figure 5 and Figure 6, the buffering valve rod assembly A III is identical with the buffering structures of valve rod assembly B VI, includes slow
Valve rod 15 is rushed, both sides in valve rod 15 is buffered and is respectively equipped with oil duct f and oil duct g, buffering valve rod 15 passes on left spring III 16 and leaned against
On spring base III 17, spring base III 17 is leaned against on plug screw III 9 by back-up ring 18, and the damper piston 14 on the right side of buffering valve rod 15 is big
Under the collective effect of spring 12 and little spring 13, on the step of valve inner, big spring 12 and little spring 13 withstand on plug screw
On VI 10, and sealed by sealing ring III 11.Buffering valve rod assembly A III passes through oil duct A, oil duct T and oil duct e；Buffer valve rod group
Part B VI passes through oil duct B, oil duct T and oil duct h.
Pressure regulation valve rod assembly I is coordinated by oil duct c and oil duct T and cut-out valve rod assembly II and gear valve rod assembly IV；Cut
Disconnected valve rod assembly II is coordinated by oil duct d with advancing, retreating valve rod assembly V；Advance, retreat valve rod assembly V by oil duct e with
Buffering valve rod assembly A III coordinates；Advance, retrogressing valve rod assembly V is coordinated by oil duct h and buffering valve rod assembly B VI.
As shown in fig. 7, application principle of the present invention is：Speed change valve 30 is from the bottom oil suction of gearbox fuel tank 35, fuel-displaced process
Fine filter 31, enter the P1 mouths of manual shift control valve 36, outlet Pt mouths and the torque-converters 32 of manual shift control valve 36
Oil inlet connection, then by overflow valve 33, reach radiator 34.The outlet 1,2,3,4 of manual shift control valve 36 respectively and
The 1 of speed change box clutch, 2,3,4 mouthfuls are connected, and outlet A, B advance with gearbox respectively to be connected with Reversing Clutch oil inlet.When
When needing to advance with gear shift, transmission oil can flow to oil duct corresponding to gearbox, into corresponding clutch, so as to realize that power changes
Gear.Meanwhile the present invention also has power cut function, if as shown in figure 5, the rightmost side hydraulic fluid port access gas of cut-out valve rod assembly II or
Oil pressure force signal, when loading machine is loaded operating mode, reaches material heap, control stick need not return middle position, directly step on foot brake and step on
Plate, now, gas or oil pass through foot brake pedal, reach cut-out valve assembly 8, promote cut-out valve rod 19 to left movement, cut-out oil duct c
To oil duct d path, oil duct d is set to be connected with oil duct T.Now, although control stick advances also in gear positions, retreats valve rod
27 pressure oil is cut off, and clutch is in oil return state, so power is cut off.
As shown in Figure 5, Figure 6, in the use of the present invention, advancing one grade as hung, action process is as follows in valve body：P1 points of oil-feed
Into two strands, one reaches gearshift valve rod 21, enters one grade of clutch of gearbox from oil duct 1, one is through oil channel c to Dutch in addition
Disconnected valve rod 19, into oil duct d, then enter oil duct e by advancing, retreating valve rod 27, then reach buffering valve rod assembly A's III
Valve rod 15 is buffered, eventually arrives at oil duct A, while by the internal galleries of buffering valve rod 15, reach left end oil duct f and right-hand member oil duct
g.In A mouth Oil feeding process, A mouth pressure is gradually increasing.Now, due to there is throttling at g mouths, buffering valve rod 15 is in both ends hydraulic coupling
Moved to right with spring force collective effect, buffering valve rod 15 approaches to turn off, and now A mouths pressure gradually rises, and the boosting curve of A mouths takes
Certainly in the area and the compression stress of big spring 12 and little spring 13 of damper piston 14.When the buffering pressure at two ends of valve rod 15 is equal,
In the presence of spring III 16, buffering valve rod 15 comes back to high order end, and now, buffering valve rod 15 is fully open, A mouth pressure etc.
In system pressure, this process is the buffering course of drive shift, ensure that forward clutch slowly combines, and reduces shift shock, after
Clutch principle is recessed to be same as above.After the oil-filled end of forward clutch, pressure regulation valve rod 3 moves to right, and transmission oil is through oil channel b, stream at oil duct c
To Pt mouths, torque-converters 32 is entered.
Claims (9)
1. a kind of gearbox manual shift control valve, include the upper valve body (29) and lower valve body (28) of mutual cooperation, its feature
It is：Pressure regulation valve rod assembly (I), cut-out valve rod assembly (II) and buffering valve rod assembly A (III) are provided with the upper valve body (29),
Gear valve rod assembly (IV), advance are provided with lower valve body (28), retreats valve rod assembly (V) and buffering valve rod assembly B (VI)；Adjust
Pressure valve bar assembly (I) is coordinated by oil duct c and oil duct T and cut-out valve rod assembly (II) and gear valve rod assembly (IV)；Stop valve
Bar assembly (II) is coordinated by oil duct d with advancing, retreating valve rod assembly (V)；Advance, retrogressing valve rod assembly (V) passes through oil duct e
Coordinate with buffering valve rod assembly A (III)；Advance, retrogressing valve rod assembly (V) is matched somebody with somebody by oil duct h and buffering valve rod assembly B (VI)
Close.
2. gearbox according to claim 1 manual shift control valve, it is characterised in that：The pressure regulation valve rod assembly
(I) pressure regulation valve rod (3), spring I (5), plug screw I (6) and cover plate (1) are included, pressure regulation valve rod (3) passes through oil duct c, oil duct b and oil
Road T, pressure regulation valve rod (3) right side are connected with plug screw I (6) by spring I (5), are connected on the left of pressure regulation valve rod (3) with cover plate (1).
3. gearbox according to claim 1 manual shift control valve, it is characterised in that：The cut-out valve rod assembly
(II) include cut-out valve rod (19), spring II (20) and cut-out valve assembly (8), cut-out valve rod (19) pass through oil duct c, oil duct d and
Oil duct T, cut-out valve rod (19) pass on left spring II (20) and are connected with cover plate (1), total with stop valve on the right side of cut-out valve rod (19)
Connected into (8).
4. gearbox according to claim 1 manual shift control valve, it is characterised in that：The gear valve rod assembly
(IV) gear valve rod (21) is included, gear valve rod (21) passes through oil duct c, oil duct 1, oil duct 2, oil duct 3, oil duct 4 and oil duct T, shelves
Position valve rod (21) right-hand member is positioned by steel ball (25) and spring IV (24), and gear valve rod (21) left end is close by seal assembly (22)
Envelope.
5. gearbox according to claim 4 manual shift control valve, it is characterised in that：The gear valve rod (21)
Displacement range is 0~27mm.
6. gearbox according to claim 1 manual shift control valve, it is characterised in that：It is described to advance, retreat valve rod
Component (V) includes the valve rod (27) that advances, retreats, and advance, retrogressing valve rod (27) pass through oil duct h, oil duct d, oil duct e and oil duct T,
Advance, retrogressing valve rod (27) right-hand member passes through close by steel ball (25) and spring IV (24) positioning, advance, retrogressing valve rod (27) left end
Sealing assembly (22) seals.
7. gearbox according to claim 6 manual shift control valve, it is characterised in that：It is described to advance, retreat valve rod
(27) displacement range is 0~18mm.
8. gearbox according to claim 1 manual shift control valve, it is characterised in that：The buffering valve rod assembly A
(III) it is identical with buffering valve rod assembly B (VI) structure, include buffering valve rod (15), buffering valve rod (15) interior both sides are respectively equipped with
Oil duct f and oil duct g, buffering valve rod (15) pass on left spring III (16) and are connected with plug screw III (9), logical on the right side of buffering valve rod (15)
Cross damper piston (14) and the big spring (12) to cooperate and little spring (13) is connected with plug screw VI (10)；Buffer valve rod assembly
A (III) passes through oil duct A, oil duct T and oil duct e；Buffering valve rod assembly B (VI) passes through oil duct B, oil duct T and oil duct h.
9. gearbox according to any one of claim 1 to 8 manual shift control valve, it is characterised in that：On described
Sealing gasket (2) is provided between valve body (29) and lower valve body (28), upper valve body (29) and lower valve body (28) are bolted connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561926.1A CN107339416B (en) | 2017-07-11 | 2017-07-11 | Manual gear shifting control valve for gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561926.1A CN107339416B (en) | 2017-07-11 | 2017-07-11 | Manual gear shifting control valve for gearbox |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107339416A true CN107339416A (en) | 2017-11-10 |
| CN107339416B CN107339416B (en) | 2022-10-14 |
Family
ID=60218660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710561926.1A Active CN107339416B (en) | 2017-07-11 | 2017-07-11 | Manual gear shifting control valve for gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107339416B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826840A (en) * | 2019-04-02 | 2019-05-31 | 江苏汇智高端工程机械创新中心有限公司 | A kind of dynamic power shift gear box pressure buffer valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5454764A (en) * | 1993-12-03 | 1995-10-03 | General Motors Corporation | Manual transmission control |
| CN2477453Y (en) * | 2001-04-29 | 2002-02-20 | 山东工程机械厂 | Electrohydraulic controlled speed controlling and dispensing valve |
| CN102072315A (en) * | 2010-08-16 | 2011-05-25 | 浙江高宇液压机电有限公司 | Novel variable-speed operating valve |
| CN203051736U (en) * | 2013-01-30 | 2013-07-10 | 江苏柳工机械有限公司 | Power shift transmission operating valve with independent buffering gears |
| CN105889574A (en) * | 2016-06-13 | 2016-08-24 | 杭州前进齿轮箱集团股份有限公司 | Operating valve for double-pull rod type gearbox with cutting function |
| CN207018492U (en) * | 2017-07-11 | 2018-02-16 | 山东临工工程机械有限公司 | A kind of gearbox manual shift control valve |
-
2017
- 2017-07-11 CN CN201710561926.1A patent/CN107339416B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5454764A (en) * | 1993-12-03 | 1995-10-03 | General Motors Corporation | Manual transmission control |
| CN2477453Y (en) * | 2001-04-29 | 2002-02-20 | 山东工程机械厂 | Electrohydraulic controlled speed controlling and dispensing valve |
| CN102072315A (en) * | 2010-08-16 | 2011-05-25 | 浙江高宇液压机电有限公司 | Novel variable-speed operating valve |
| CN203051736U (en) * | 2013-01-30 | 2013-07-10 | 江苏柳工机械有限公司 | Power shift transmission operating valve with independent buffering gears |
| CN105889574A (en) * | 2016-06-13 | 2016-08-24 | 杭州前进齿轮箱集团股份有限公司 | Operating valve for double-pull rod type gearbox with cutting function |
| CN207018492U (en) * | 2017-07-11 | 2018-02-16 | 山东临工工程机械有限公司 | A kind of gearbox manual shift control valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826840A (en) * | 2019-04-02 | 2019-05-31 | 江苏汇智高端工程机械创新中心有限公司 | A kind of dynamic power shift gear box pressure buffer valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107339416B (en) | 2022-10-14 |
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