CN102259433A - Hydraulic machine - Google Patents
Hydraulic machine Download PDFInfo
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- CN102259433A CN102259433A CN2011102031829A CN201110203182A CN102259433A CN 102259433 A CN102259433 A CN 102259433A CN 2011102031829 A CN2011102031829 A CN 2011102031829A CN 201110203182 A CN201110203182 A CN 201110203182A CN 102259433 A CN102259433 A CN 102259433A
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- oil
- pressure
- pump
- plunger
- low
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- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 239000002828 fuel tank Substances 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000007306 turnover Effects 0.000 claims description 9
- 206010008469 Chest discomfort Diseases 0.000 claims description 8
- 210000002445 nipple Anatomy 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 41
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000035611 feeding Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a hydraulic machine. The hydraulic machine comprises a shell, a drive motor, an oil pump, an oil tank and a hydraulic cylinder, wherein the oil pump is a plunger pump; an output shaft of the drive motor is connected with a camshaft of the plunger pump; a cam tappet rod mechanism is formed by the camshaft and a plunger; the upper part of a pump cavity of the plunger pump is provided with a high-pressure cavity, and the lower part of the pump cavity is provided with a low-pressure cavity; the cross section radius of the low-pressure cavity is greater than that of the high-pressure cavity; the plunger in the pump cavity is provided with a boss structure which has the same size as the high-pressure cavity and the low-pressure cavity of the pump cavity; the upper parts of the high-pressure cavity and the low-pressure cavity are provided with oil inlet and outlet holes; and the oil inlet and outlet holes of the high-pressure cavity and the low-pressure cavity are connected with the oil tank through respective oil inlet circuits in which oil inlet one-way valves are arranged, and are connected with the hydraulic cylinder through respective oil outlet circuits in which oil outlet one-way valves are arranged. The hydraulic machine can supply oil through a high-pressure oil circuit and a low-pressure oil circuit simultaneously, automatically switches high pressure and low pressure according to different loads, and has a simple integral structure and multiple functions.
Description
Technical field
The present invention relates to a kind of hydraulic press, particularly a kind of high-low pressure is the hydraulic press of conversion automatically.
Background technology
As everyone knows, hydraulic press is exactly by oil pump the hydraulic oil in the fuel tank to be fed in the hydraulic cylinder, drive hydraulic actuating mechanism work by hydraulic cylinder, yet the use occasion of hydraulic press is not simultaneously, the requirement of its flexibility is just higher, most hydraulic press is very stiff, can not be according to the actual needs rational regulator solution pressure pressure, very narrow between its pressure regulatory region, be not suitable for the actual needs of work, but, along with progress of science and technology, the hydraulic press of high-low pressure conversion has also appearred realizing in succession, this hydraulic press can according to the sequence valve on the needs regulator solution press of actual loading or the transposition switch reaches the pressure of actual demand, for example: when plain feed, use low pressure, increase with load when needing hydraulic press to have an effect is converted to the high pressure output state, so solve the use problem under the high load condition, particularly hydraulic press carries out fragmentation, cutting, punching, crooked, just need under the working condition such as fastening to carry the hydraulic press of high load capacity work, but, the high-low pressure conversion of the common hydraulic press that can realize the high-low pressure conversion all will be by being provided with sequence valve or other switching mechanism in addition, the complexity that structure seems suitable, the conversion that needs operating personnel's practical experience to remove the pressure and the high-low pressure thereof of regulator solution press, the automation depth is not high, simultaneously, realize that high pressure output and the common hydraulic press of low pressure output also need two hydraulic pumps just can finish, and two hydraulic pumps also will increase to the transmission mechanism of its transferring power, further increased the overall structure of hydraulic press, not only weight and volume increases, being not easy to the staff carries, and cause the cost up of hydraulic press, be unfavorable for actual use; Secondly, hydraulic press utilization scope is wider, need use different execution frocks in the different scopes of application, so the hydraulic press of various execution frocks occurred, but the execution frock of existing hydraulic press is fixing usually, lack interchangeability, the situation of various hydraulic tools on the subtask band can appear carrying out in the staff in the work of reality, and the efficient that causes the staff to execute the task reduces; Once more, the rotating speed of common Hydraulic engine oil pump can be activated the restriction in motor self rotating speed interval, can not satisfy the needs that use flexibly; Also have hydraulic press to be used for outdoor study more, outdoor study lacks the electric power source, when working out of doors, occur sometimes can't operation situation, have a strong impact on job scheduling, also have the fuel tank of hydraulic press to adopt the rigidity fuel tank usually at last, not only increased the weight of hydraulic press, but also occurred the situation of oil spilling easily.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of hydraulic press, this hydraulic pressure function realizes the automatic conversion of high-low pressure output according to the variation of load, and its compact conformation, volume is little, dynamic property is strong, diverse in function, is particularly suitable for field work.
For achieving the above object, the technical solution used in the present invention is: a kind of hydraulic press, comprise housing, drive motors, oil pump, fuel tank, hydraulic cylinder, the described oil pump that is driven by drive motors is a plunger displacement pump, its drive motors output shaft connects the camshaft of plunger displacement pump, be provided with on the camshaft and can in pump chamber, do the piston plunger movable, camshaft and plunger form tappet mechanism, its pump chamber top is set to high pressure chest, the pump chamber bottom is set to low-pressure cavity, the cross section radius of low-pressure cavity is greater than the cross section radius of high pressure chest, plunger in the described pump chamber is set to the boss structure of corresponding size with the size in pump chamber high-low pressure chamber, the top in described high-low pressure chamber all is provided with the turnover oilhole, the turnover oil oilhole in high-low pressure chamber connects fuel tank by oil-feed oil circuit separately, in its oil-feed oil circuit in line check valve is set all, the turnover oil oilhole in high-low pressure chamber connects hydraulic cylinder by fuel-displaced oil circuit separately, in its fuel-displaced oil circuit fuel-displaced check valve is set all.
In order further to optimize the structure of its plunger, the boss structure that described plunger is made up of high-pressure column stopper rod and lower pressure column plug sleeve, lower pressure column plug sleeve bottom is provided with projection, in the lower pressure column plug sleeve plunger spring is set, the convex surfaces of lower pressure column plug sleeve contacts with the base upper surface that high-pressure column stopper rod bottom is provided with.
In order to realize the functional diversities of hydraulic press, strengthen the frock interchangeability of hydraulic press, be provided with on the described hydraulic cylinder and the detachable joint that connects of execution frock.
In order to promote the interchangeability effect of detachable joint, described joint is a nipple.
In order to improve the speed adjustable range of hydraulic press, adapt to the needs of various operating modes, transmission is provided with planetary transmission between the camshaft of described drive motors output shaft and plunger displacement pump.
In order to adapt to the needs of outwork, strengthen the practice ability of hydraulic press, the extension, lower end of described housing forms handle, is provided with the battery and the battery charger that connect drive motors in the handle.
In order to reduce the rigidity loss of fuel tank, in the service life of improving fuel tank, described fuel tank is flexible fuel tank.
Beneficial effect of the present invention is: hydraulic pressure function of the present invention realizes the automatic conversion of hydraulic press high-low pressure output according to the variation of load, and only used a plunger displacement pump just to finish the pressure output of high-low pressure, its compact conformation, volume is little, can successfully manage under the various unequally loaded operating modes and work, the detachable nipple of its setting, effectively improved the interchangeability of hydraulic press frock, thereby strengthened the functional diversity of hydraulic press, simultaneously, the planetary transmission that is provided with has further expanded the adjustable range of hydraulic press pressure, and adopt chargeable storage battery power supply, make hydraulic press can apply in a flexible way, further expanded the practical ranges of hydraulic press, also have fuel tank to adopt flexible fuel tank in outdoor study, effectively raise its service life, strengthened the durability of hydraulic press.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is further described:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of A portion among Fig. 1;
Fig. 3 is for omitting the schematic diagram that plunger portion is divided among Fig. 2;
Fig. 4 is for omitting the opposite direction schematic diagram that plunger portion is divided among Fig. 2;
Fig. 5 is the structural representation of plunger;
Fig. 6 overlooks cross-sectional view, i.e. C-C portion cutaway view among Fig. 1 for Fig. 1's;
Fig. 7 is the partial enlarged drawing of B portion among Fig. 6.
The specific embodiment
Extremely shown in Figure 7 as Fig. 1, a kind of hydraulic press, comprise housing 10, drive motors 1, oil pump, fuel tank 5, hydraulic cylinder 2, the described oil pump that is driven by drive motors 1 is a plunger displacement pump, its drive motors 1 output shaft connects the power input shaft of planetary transmission 3, the power output shaft of planetary transmission 3 connects the camshaft 4 of plunger displacement pump, be provided with on the camshaft 4 and can in pump chamber 13, do piston plunger movable 14, camshaft 4 and plunger 14 form tappet mechanism, its pump chamber 13 tops are set to high pressure chest 13a, pump chamber 13 bottoms are set to low-pressure cavity 13b, the cross section radius of low-pressure cavity 13b is greater than the cross section radius of high pressure chest 13a, plunger 14 in the described pump chamber 13 is with pump chamber 13 high-low pressure chamber 13a, the size of 13b is set to the boss structure of corresponding size, described boss structure specifically is made up of high-pressure column stopper rod 14a and lower pressure column plug sleeve 14b, lower pressure column plug sleeve 14b portion within it is provided with plunger spring 15, its bottom is provided with protruding 14c, projection 14c inwall and high-pressure column stopper rod 14a are by sealing ring 17 sealings, projection 14c surface contacts with the base 14d upper surface that high-pressure column stopper rod 14a bottom is provided with, and the cam face that can compress high-pressure column stopper rod 14a and camshaft 4 when the active force of spring 15 is compressing lower pressure column plug sleeve 14b and high-pressure column stopper rod 14a base 14d applying is simultaneously fitted; As Fig. 3, shown in Figure 4, described high-low pressure chamber 13a, between the stroke lower end of 13b and the plunger 14 sealing ring is set, effectively improve the efficient of plunger displacement pump, high-low pressure chamber 13a, the top of 13b all is provided with turnover oilhole 16a, 16b, high-low pressure chamber 13a, the turnover oil oilhole 16a of 13b, 16b passes through oil-feed oil circuit 8a separately, 8b connects fuel tank 5, its oil-feed oil circuit 8a, in line check valve 6a all is set among the 8b, 6b, high-low pressure chamber 13a, the turnover oil oilhole 16a of 13b, 16b passes through fuel-displaced oil circuit 9a separately, 9b connects hydraulic cylinder 2, its fuel-displaced oil circuit 9a, fuel-displaced check valve 7a all is set among the 9b, 7b, hydraulic cylinder 2 is connected fuel tank by oil return circuit 22 with skimmer circuit again, switch valve 21 and overflow valve are set respectively in oil return circuit 22 and the skimmer circuit, form a hydraulic press oil circuit of finishing thus, be provided with on the described hydraulic cylinder 2 and the execution frock 19 detachable nipples that connect 18, various execution frocks 19 all can be exchanged through nipple 18, satisfy the needs of various operations with this, it is carried out frock 19 and comprises broken frock, the punching frock, crooked frock, shear frock, fastening frock and other auxiliary mould; Described hydraulic press outside is provided with housing 10, the extension, lower end of housing 10 forms handle, be provided with the battery 12 and the battery charger 11 that connect drive motors 1 in the handle, simultaneously, rigidity wearing and tearing for fear of fuel tank 5, its fuel tank 5 is flexible fuel tank, and the oil-feed oil circuit import department in its fuel tank 5 also is provided with the cleaner 20 that is used to filter hydraulic oil.
Extremely shown in Figure 7 as Fig. 1, hydraulic press operation principle: at first select suitable execution frock 19 to be installed on the hydraulic cylinder 2 by nipple 18, the primer fluid press, the chargeable battery 12 that is provided with by the lower end of housing 10 is to drive motors 1 power supply, drive motors 1 starts the back and drives planetary transmission 3, after planetary transmission 3 speed governing again with the camshaft 4 of power transmission to plunger displacement pump, do the lower piston motion by the plunger 14 that camshaft 4 drives in the pump chamber 13, camshaft 4 forms tappet mechanism with plunger 14, pump chamber 13 tops of plunger displacement pump are high pressure chest 13a, its underpart is low-pressure cavity 13b, because of the cross section radius of low-pressure cavity 13b cross section radius greater than high pressure chest 13a, plunger 14 is the boss structure that corresponding pump chamber 13 is provided with, so form the different hydraulic pressure output of height; When plunger 14 descending, pump chamber 13 oil suctions, so check valve 6a, 6b on oil-feed oil circuit 8a, the 8b open, check valve 7a, 7b on fuel-displaced oil circuit 9a, the 9b close; Up when plunger 14, pump chamber 13 is fuel-displaced, so check valve 7a, 7b on fuel-displaced oil circuit 9a, the 9b open, check valve 6a, 6b on oil-feed oil circuit 8a, the 8b close; By the oil suction of plunger displacement pump, the fuel-displaced course of work, thus the operation principle of realization plunger displacement pump; As Fig. 6, shown in Fig. 7, when hydraulic cylinder 2 load of bearing is low, high-low pressure chamber 13a, 13b simultaneously by oil circuit separately to hydraulic cylinder 2 fuel feeding, along with hydraulic cylinder 2 load of bearing progressively increases, pressure in the hydraulic cylinder 2 is progressively near the output pressure of low pressure oil pocket 13b, check valve 7b on the low pressure oil circuit 9b progressively closes, when the pressure in the hydraulic cylinder 2 surpasses the output pressure of low pressure oil pocket 13b, check valve 7b on the low pressure oil circuit 9b closes, low pressure oil pocket 13b stops fuel-displaced, has only high-pressure oil passage 9a output hydraulic oil, realize hydraulic cylinder 2 high pressure feedings, at this moment, oil-feed oil circuit 8a, two check valve 6a on the 8b, the 6b operate as normal, article two, oil-feed oil circuit 8a, 8b is oil-feed together, oil-feed efficient is constant, same is, the load of being born along with hydraulic cylinder 2 progressively reduces, when the pressure in the hydraulic cylinder 2 is lower than the output pressure of low pressure oil pocket 13b, check valve 7b on the low pressure oil circuit 9b opens once more, low pressure oil circuit 9b progressively begins fuel feeding, thus, realize the automatic conversion of the high-low pressure fuel feeding of hydraulic press, when hydraulic press is used for fragmentation, punching, crooked, shear, need not manual adjustment during operating mode such as fastening, just can change the output of high-low pressure oil pressure automatically along with the increase of operating load.
Above embodiment only is a kind of explanation that the present invention is carried out, and to the modification of technical solution of the present invention or similar be equal to replacement, all belongs to covering scope of the present invention.
Claims (7)
1. hydraulic press, comprise housing (10), drive motors (1), oil pump, fuel tank (5), hydraulic cylinder (2), it is characterized in that: the described oil pump that is driven by drive motors (1) is a plunger displacement pump, its drive motors (1) output shaft connects the camshaft (4) of plunger displacement pump, camshaft (4) is gone up setting can do piston plunger movable (14) in pump chamber (13), camshaft (4) and plunger (14) form tappet mechanism, its pump chamber (13) top is set to high pressure chest (13a), pump chamber (13) bottom is set to low-pressure cavity (13b), the cross section radius of low-pressure cavity (13b) is greater than the cross section radius of high pressure chest (13a), plunger (14) in the described pump chamber (13) is with pump chamber (13) high-low pressure chamber (13a, size 13b) is set to the boss structure of corresponding size, described high-low pressure chamber (13a, top 13b) all is provided with turnover oilhole (16a, 16b), high-low pressure chamber (13a, turnover oil oilhole (16a 13b), 16b) oil-feed oil circuit (the 8a by separately, 8b) connect fuel tank (5), its oil-feed oil circuit (8a, in line check valve (6a all is set 8b), 6b), high-low pressure chamber (13a, turnover oil oilhole (16a 13b), 16b) fuel-displaced oil circuit (the 9a by separately, 9b) connect hydraulic cylinder (2), its fuel-displaced oil circuit (9a, fuel-displaced check valve (7a all is set 9b), 7b).
2. hydraulic press according to claim 1, it is characterized in that: the boss structure that described plunger (14) is made up of high-pressure column stopper rod (14a) and lower pressure column plug sleeve (14b), lower pressure column plug sleeve (14b) bottom is provided with projection (14c), plunger spring (15) is set in the lower pressure column plug sleeve (14b), and projection (14c) surface of lower pressure column plug sleeve (14b) contacts with base (14d) upper surface that high-pressure column stopper rod (14a) bottom is provided with.
3. hydraulic press according to claim 1 and 2 is characterized in that: described hydraulic cylinder (2) is gone up and is provided with and execution frock (19) the detachable joints that connect (18).
4. hydraulic press according to claim 3 is characterized in that: described joint is nipple (18).
5. according to claim 3 or 4 described hydraulic presses, it is characterized in that: transmission is provided with planetary transmission (3) between the camshaft (4) of described drive motors (1) output shaft and plunger displacement pump.
6. hydraulic press according to claim 5 is characterized in that: the extension, lower end of described housing (10) forms handle, is provided with the battery (12) and the battery charger (11) that connect drive motors (1) in the handle.
7. hydraulic press according to claim 6 is characterized in that: described fuel tank (5) is flexible fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203182.9A CN102259433B (en) | 2011-07-20 | 2011-07-20 | Hydraulic machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203182.9A CN102259433B (en) | 2011-07-20 | 2011-07-20 | Hydraulic machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102259433A true CN102259433A (en) | 2011-11-30 |
| CN102259433B CN102259433B (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110203182.9A Active CN102259433B (en) | 2011-07-20 | 2011-07-20 | Hydraulic machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102259433B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105899317A (en) * | 2014-04-23 | 2016-08-24 | 里奇工具公司 | Hydraulic press tool |
| CN106944959A (en) * | 2017-03-10 | 2017-07-14 | 黄建鑫 | A kind of automatic oil return formula hydraulic pressure pressure pipe pincers |
| CN107900202A (en) * | 2017-12-21 | 2018-04-13 | 安徽省华夏机床制造有限公司 | A kind of special hole punched device of cone barrel workpiece and its application method |
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|---|---|---|---|---|
| DE2339168A1 (en) * | 1972-08-04 | 1974-02-14 | Corning Glass Works | CONTROL DEVICE FOR PRESSES |
| JPS5992198A (en) * | 1982-11-15 | 1984-05-28 | Sumitomo Heavy Ind Ltd | Hydraulic press having pneumatic-hydraulic booster |
| US4630442A (en) * | 1984-06-18 | 1986-12-23 | Trol-Mation, Inc. | Apparatus and method for pre-filling a hydraulic motor |
| JPH09314391A (en) * | 1996-05-27 | 1997-12-09 | Kobe Steel Ltd | Method for reducing pressure of cold isotropic pressurizing device and device therefor |
| CN1191507A (en) * | 1995-07-25 | 1998-08-26 | 株式会社小松制作所 | High-speed safety circuit of hydraulic machine |
| CN1192714A (en) * | 1995-07-06 | 1998-09-09 | 株式会社小松制作所 | High-speed high-load hydraulic cylinder system and control method thereof |
| US20070062247A1 (en) * | 2005-08-16 | 2007-03-22 | Schuler Pressen Gmnh & Co. Kg | Press driving module and method of providing a press line |
| CN202156044U (en) * | 2011-07-20 | 2012-03-07 | 王军 | Hydraulic machine |
-
2011
- 2011-07-20 CN CN201110203182.9A patent/CN102259433B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2339168A1 (en) * | 1972-08-04 | 1974-02-14 | Corning Glass Works | CONTROL DEVICE FOR PRESSES |
| JPS5992198A (en) * | 1982-11-15 | 1984-05-28 | Sumitomo Heavy Ind Ltd | Hydraulic press having pneumatic-hydraulic booster |
| US4630442A (en) * | 1984-06-18 | 1986-12-23 | Trol-Mation, Inc. | Apparatus and method for pre-filling a hydraulic motor |
| CN1192714A (en) * | 1995-07-06 | 1998-09-09 | 株式会社小松制作所 | High-speed high-load hydraulic cylinder system and control method thereof |
| CN1191507A (en) * | 1995-07-25 | 1998-08-26 | 株式会社小松制作所 | High-speed safety circuit of hydraulic machine |
| JPH09314391A (en) * | 1996-05-27 | 1997-12-09 | Kobe Steel Ltd | Method for reducing pressure of cold isotropic pressurizing device and device therefor |
| US20070062247A1 (en) * | 2005-08-16 | 2007-03-22 | Schuler Pressen Gmnh & Co. Kg | Press driving module and method of providing a press line |
| CN202156044U (en) * | 2011-07-20 | 2012-03-07 | 王军 | Hydraulic machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105899317A (en) * | 2014-04-23 | 2016-08-24 | 里奇工具公司 | Hydraulic press tool |
| US10010066B2 (en) | 2014-04-23 | 2018-07-03 | Ridge Tool Company | Hydraulic press tool |
| CN106944959A (en) * | 2017-03-10 | 2017-07-14 | 黄建鑫 | A kind of automatic oil return formula hydraulic pressure pressure pipe pincers |
| CN106944959B (en) * | 2017-03-10 | 2024-02-02 | 台州瑞祺工具股份有限公司 | Automatic oil return type hydraulic pipe tongs |
| CN107900202A (en) * | 2017-12-21 | 2018-04-13 | 安徽省华夏机床制造有限公司 | A kind of special hole punched device of cone barrel workpiece and its application method |
| CN107900202B (en) * | 2017-12-21 | 2023-10-27 | 安徽省华夏机床制造有限公司 | Special punching device for conical cylindrical workpiece and application method of special punching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102259433B (en) | 2014-04-09 |
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Effective date of registration: 20231101 Address after: 509, Unit 2, 5th Floor, Building 4, Shangshui Garden, Baijiatuan, Haidian District, Beijing, 100080 Patentee after: Dayou Zhenxing (Beijing) Technology Industry Development Co.,Ltd. Address before: Unit 5-2, Unit 2, No. 308 Jianxin East Road, Jiangbei District, Chongqing, 400023 Patentee before: Wang Jun |
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Effective date of registration: 20231116 Address after: Room 6-245, Zone B, Science and Technology Incubation Building, Pengshui Industrial Park, Lushan Community, Baojia Town, Pengshui Miao and Tujia Autonomous County, Chongqing, 409607 Patentee after: Dayou Guohua (Chongqing) Technology Development Co.,Ltd. Address before: 509, Unit 2, 5th Floor, Building 4, Shangshui Garden, Baijiatuan, Haidian District, Beijing, 100080 Patentee before: Dayou Zhenxing (Beijing) Technology Industry Development Co.,Ltd. |