CN204163138U - Super-tonnage excavator straight line moving hydraulic system - Google Patents
Super-tonnage excavator straight line moving hydraulic system Download PDFInfo
- Publication number
- CN204163138U CN204163138U CN201420490119.7U CN201420490119U CN204163138U CN 204163138 U CN204163138 U CN 204163138U CN 201420490119 U CN201420490119 U CN 201420490119U CN 204163138 U CN204163138 U CN 204163138U
- Authority
- CN
- China
- Prior art keywords
- control valves
- direction control
- banked direction
- oil
- pipeline
- 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.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses a kind of super-tonnage excavator straight line moving hydraulic system, converging valve (6) walked respectively by first actuator port of the first banked direction control valves (1) first two oil-ins with the first row are connected, its second actuator port of first respectively with left driving speed reducer motor (8), the reversion hydraulic fluid port of right driving speed reducer motor (9) connects, second banked direction control valves (2), 3rd banked direction control valves (3) walks two oil-ins of converging valve (6) respectively with the first row, left driving speed reducer motor (8) is connected with right driving speed reducer motor (9), the first row walk converging valve (6) two actuator ports respectively with left driving speed reducer motor (8), the rotating forward hydraulic fluid port of right driving speed reducer motor (9) connects, the pilot control opening pipeline that first pilot control opening and the first row of the first banked direction control valves (1) walk converging valve (6) is connected.The utility model can realize the straight line moving function of excavator in original system by increasing converging valve block.
Description
Technical field
The utility model relates to excavator, specifically a kind of super-tonnage excavator straight line moving hydraulic system.
Background technology
At present, super-tonnage excavator is in high speed walking process, the mode needing many pumps to collaborate is to provide power, and the hydraulic system of excavator mostly adopts the fuel system of the many valves of many pumps, and the fuel system at this many pump interflow makes excavator easy sideslip when needs straight line moving.Although have some systems that excavator can be made to realize straight line moving at present, but its complex structure, complex installation process, the electrical system that even also needs had assists control, and for the excavator of super-tonnage, complicated hydraulic system structure is unfavorable for safeguarding, nor is beneficial to and is transplanted in the middle of more original systems.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of super-tonnage excavator straight line moving hydraulic system, and its structure is simple, is easy to realize, there is very strong transplantability, in original system, the straight line moving function of excavator can be realized by increasing converging valve block.
To achieve these goals, the utility model provides a kind of super-tonnage excavator straight line moving hydraulic system, comprise the first main pump, second main pump, 3rd main pump, left driving speed reducer motor, right driving speed reducer motor, first double check valve, second double check valve, first pilot operated directional control valve, described second main pump is identical with the 3rd main pump size, the specification of described two motors is identical, described first main pump, second main pump, 3rd main pump is respectively by pipeline and the first banked direction control valves, second banked direction control valves, the oil-in of the 3rd banked direction control valves connects, described first banked direction control valves, the oil return opening of the second banked direction control valves and the 3rd banked direction control valves is all connected with fuel tank pipeline, first actuator port of described first banked direction control valves first walks the first oil-in of converging valve respectively by pipeline and the first row and the second oil-in is connected, second actuator port of described first banked direction control valves first is respectively by pipeline and left driving speed reducer motor, the reversion hydraulic fluid port of right driving speed reducer motor connects,
Described second banked direction control valves, the 3rd banked direction control valves separately first the first actuator port walks the first oil-in of converging valve respectively by pipeline and the first row, the second oil-in is connected, described second banked direction control valves, the 3rd banked direction control valves separately first the second actuator port be connected respectively by the reversion hydraulic fluid port of pipeline with left driving speed reducer motor, right driving speed reducer motor, described the first row walks the first actuator port of converging valve, the second actuator port is connected respectively by the rotating forward hydraulic fluid port of pipeline with left driving speed reducer motor, right driving speed reducer motor;
The pilot control opening pipeline that first pilot control opening and the first row of described first banked direction control valves walk converging valve is connected.
In this technical scheme, converging valve is walked by having connect the first row in running gear China and foreign countries, and the pilot control opening making the first pilot control opening of the first banked direction control valves and the first row walk converging valve is connected, thus realize control the first row being walked to converging valve operating position, and then the fluid of three main pump supplies can be made to walk in converging valve to force interflow to be shunted again in the first row, and make the fluid after shunting all give two, the left and right motor of excavator, the straight ahead of excavator just can be kept to have walked.The speed straight line that so just can realize not conforming under stream mode advances walking, the higher speed straight ahead walking under the state of interflow, and this system architecture is simple, low cost of manufacture, be easy to realize, portable strong, can directly walk converging valve to realize by installed rows on original system pipeline.
Further, also comprise the second walking converging valve, second actuator port of described first banked direction control valves first is connected respectively by walk the first oil-in of converging valve and the second oil-in of pipeline and described second, described second banked direction control valves, the 3rd banked direction control valves separately first the second actuator port be connected respectively by walk the first oil-in of converging valve, the second oil-in of pipeline and described second, the walk pilot control opening pipeline of converging valve of second pilot control opening and second of described first banked direction control valves is connected.
In this technical scheme, by the setting of the second walking converging valve, and the second pilot control opening of the first banked direction control valves is connected with the second pilot control opening of walking converging valve, thus make the first banked direction control valves can to the first row walk converging valve and second walking converging valve operating position control, and then can make the fluid of three main pump supplies in two converging valves, force interflow to be shunted again, and make the fluid after shunting all give two, the left and right motor of excavator, just can keep the straight line moving of excavator.So just can to realize not conforming under stream mode low speed straight ahead or retreat walking, higher speed straight ahead under the state of interflow or retrogressing walking, this system architecture is simple, low cost of manufacture, be easy to realize, portable strong, can directly walk converging valve to realize by installed rows on original system pipeline.
Further, first actuator port, second actuator port of described first banked direction control valves first are connected respectively by the oil-in of pipeline with the first double check valve, the second double check valve, two oil-outs of described first double check valve walk the first oil-in of converging valve respectively with the first row and the second oil-in pipeline is connected, and walk with second respectively first oil-in of connection of converging valve and the second oil-in pipeline of two oil-outs of described second double check valve connects.
In this technical scheme, walk converging valve by making the first actuator port of the first banked direction control valves first by the first double check valve and the first row to be connected, second actuator port of the first banked direction control valves first being connected by the second double check valve and second converging valve of walking, can preventing excavator from occurring the oily phenomenon of string when turning left or turn right.
Further, described second banked direction control valves, the 3rd banked direction control valves are multichannel pressure-gradient control valve.
In this technical scheme, by making the second banked direction control valves, the 3rd banked direction control valves is multichannel pressure-gradient control valve, can guarantee when the second banked direction control valves, the 3rd banked direction control valves first spool are opened, several valves below do not have working oil liquid, thus can guarantee that the second main pump and the 3rd main pump are entirely two motors of walking left and right and carry out fuel feeding, and two pump sizes are identical, the specification of two motors is identical, just can ensure to excavate function straight line moving.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present utility model.
In figure: 1, the first banked direction control valves, the 2, second banked direction control valves, the 3, the 3rd banked direction control valves, the 4, first double check valve, the 5, second double check valve, 6, the first row walks converging valve, the 7, second walking converging valve, 8, left driving speed reducer motor, 9, right driving speed reducer motor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of super-tonnage excavator straight line moving hydraulic system, comprise the first main pump, second main pump, 3rd main pump, left driving speed reducer motor 8, right driving speed reducer motor 9, first double check valve 4, second double check valve 5, first pilot operated directional control valve 6, described second main pump is identical with the 3rd main pump size, the specification of described two motors is identical, described first main pump, second main pump, 3rd main pump is respectively by pipeline and the first banked direction control valves 1, second banked direction control valves 2, the oil-in of the 3rd banked direction control valves 3 connects, described first banked direction control valves 1, the oil return opening of the second banked direction control valves 2 and the 3rd banked direction control valves 3 is all connected with fuel tank pipeline, first actuator port of described first banked direction control valves 1 first walks the first oil-in of converging valve 6 respectively by pipeline and the first row and the second oil-in is connected, second actuator port of described first banked direction control valves 1 first is respectively by pipeline and left driving speed reducer motor 8, the reversion hydraulic fluid port of right driving speed reducer motor 9 connects,
First actuator port of described second banked direction control valves 2, the 3rd banked direction control valves 3 respective first walks the first oil-in of converging valve 6 respectively by pipeline and the first row, the second oil-in is connected, second actuator port of described second banked direction control valves 2, the 3rd banked direction control valves 3 respective first is connected respectively by the reversion hydraulic fluid port of pipeline with left driving speed reducer motor 8, right driving speed reducer motor 9, and described the first row walks the first actuator port of converging valve 6, the second actuator port is connected respectively by the rotating forward hydraulic fluid port of pipeline with left driving speed reducer motor 8, right driving speed reducer motor 9;
The pilot control opening pipeline that first pilot control opening and the first row of described first banked direction control valves 1 walk converging valve 6 is connected.
In this embodiment, converging valve 6 is walked by having connect the first row in running gear China and foreign countries, and the pilot control opening making the first pilot control opening of the first banked direction control valves 1 and the first row walk converging valve 6 is connected, thus realize control the first row being walked to converging valve 6 operating position, and then the fluid of three main pump supplies can be made to walk in converging valve 6 to force interflow to be shunted again in the first row, and make the fluid after shunting all give two, the left and right motor of excavator, the straight ahead of excavator just can be kept to have walked.The speed straight line that so just can realize not conforming under stream mode advances walking, the higher speed straight ahead walking under the state of interflow, and this system architecture is simple, low cost of manufacture, be easy to realize, portable strong, can directly walk converging valve to realize by installed rows on original system pipeline.
Also comprise the second walking converging valve 7, second actuator port of described first banked direction control valves 1 first is connected respectively by walk the first oil-in of converging valve 7 and the second oil-in of pipeline and described second, second actuator port of described second banked direction control valves 2, the 3rd banked direction control valves 3 respective first is connected respectively by walk the first oil-in of converging valve 7, the second oil-in of pipeline and described second, and the walk pilot control opening pipeline of converging valve 7 of second pilot control opening and second of described first banked direction control valves 1 is connected.
In this embodiment, by the setting of the second walking converging valve 7, and the second pilot control opening of the first banked direction control valves 1 is connected with the second pilot control opening of walking converging valve 7, thus make the first banked direction control valves 1 can walk converging valve 6 to the first row and the second walking converging valve 7 operating position controls, and then can make the fluid of three main pump supplies in two converging valves, force interflow to be shunted again, and make the fluid after shunting all give two, the left and right motor of excavator, just can keep the straight line moving of excavator.So just can to realize not conforming under stream mode low speed straight ahead or retreat walking, higher speed straight ahead under the state of interflow or retrogressing walking, this system architecture is simple, low cost of manufacture, be easy to realize, portable strong, can directly walk converging valve to realize by installed rows on original system pipeline.
First actuator port, second actuator port of described first banked direction control valves 1 first are connected respectively by the oil-in of pipeline with the first double check valve 4, second double check valve 5, two oil-outs of described first double check valve 4 walk the first oil-in of converging valve 6 respectively with the first row and the second oil-in pipeline is connected, and walk with second respectively first oil-in of connection of converging valve 7 and the second oil-in pipeline of two oil-outs of described second double check valve 5 connects.
In this embodiment, walk converging valve 6 by making the first actuator port of the first banked direction control valves 1 first by the first double check valve 4 and the first row to be connected, second actuator port of the first banked direction control valves 1 first being connected by the second double check valve 5 and second converging valve 7 of walking, can preventing excavator from occurring the oily phenomenon of string when turning left or turn right.
Described first banked direction control valves 1, second banked direction control valves 2, the 3rd banked direction control valves 3 are multichannel pressure-gradient control valve.
In this embodiment, by making the second banked direction control valves 2, the 3rd banked direction control valves 3 is multichannel pressure-gradient control valve, can guarantee when the second banked direction control valves 2, the 3rd banked direction control valves 3 first spool are opened, several valves below do not have working oil liquid, thus can guarantee that the second main pump 2 and the 3rd main pump 3 are entirely two motors of walking left and right and carry out fuel feeding, and two pump sizes are identical, the specification of two motors is identical, just can ensure to excavate function straight line moving.
Operating principle:
The first row walks converging valve 6 and the second walking converging valve 7 all has two operating positions at least, when the first row walks converging valve 6 and the second walking converging valve 7 in the first operating position, the first row walks the first oil-in of converging valve 6 or the second walking converging valve block and the first actuator port is connected, the second oil-in and the second actuator port are connected;
When excavator does not collaborate low speed walking, by the second main pump, 3rd main pump carries out fuel feeding, first main pump is failure to actuate, thus the first row walks converging valve 6 or the second walking converging valve 7 is operated in the first operating position, the first spool of the second banked direction control valves 2 and the second banked direction control valves 3 is made to be the running gear fuel feeding of excavator by first pilot control opening or the second pilot control opening pressure signal of giving the second banked direction control valves 2 and the second banked direction control valves 3, when the first pilot control opening of the second banked direction control valves 2 and the second banked direction control valves 3 has pressure signal, second banked direction control valves 2 and the second banked direction control valves 3 are left driving speed reducer motor 8, the rotating forward fuel feeding of right driving speed reducer motor 9, when the second pilot control opening of the second banked direction control valves 2 and the second banked direction control valves 3 has pressure signal, second banked direction control valves 2 and the second banked direction control valves 3 are left driving speed reducer motor 8, the reversion fuel feeding of right driving speed reducer motor 9, because the second banked direction control valves 2 and the second banked direction control valves 3 are pressure-gradient control valve, when the first spool of two pressure-gradient control valves is opened, several valves below will not have work fluid, thus guarantee that the second main pump and the 3rd main pump can be entirely left driving speed reducer motor 8, right driving speed reducer motor 9 carries out fuel feeding, and the second main pump and the 3rd main pump size identical, the specification of two motors is also identical, such excavator just can realize not conforming to straight ahead under stream mode or retrogressing has been walked,
When excavator needs to walk at a high speed, then by the first main pump, fuel feeding is carried out at second main pump and the 3rd main pump interflow, when the first the first actuator ports of the first banked direction control valves 1 or the second hydraulic fluid port fuel feeding, when having pressure signal to the first pilot control opening of the first banked direction control valves 1, pilot signal can pass to the first row simultaneously and walk converging valve 6, when having pressure signal to the second pilot control opening of the first banked direction control valves 1, pilot signal can pass to the second walking converging valve 7 simultaneously, when the first row walk converging valve 6 or the second walking converging valve 7 have a pilot signal time, the first row walks converging valve 6 or the second walking converging valve 7 can be operated in the second operating position, thus first the walking in converging valve 6 or the second walking converging valve 7 in the first row of the fluid of three main pump supplies first collaborates, again flow is all given left lateral and walk reductor motor 8, right driving speed reducer motor 9, so just can realize higher speed straight ahead under the state of interflow or retrogressing has been walked.
The first banked direction control valves 1 first two oil-outs connect double check valve respectively, can when walking interflow do not participated in by the first main pump, prevent excavator low speed turn left or in the process of turning right the second banked direction control valves 2 and the 3rd banked direction control valves 3 hydraulic fluid port between there is altering the phenomenon of oil.
Claims (4)
1. a super-tonnage excavator straight line moving hydraulic system, comprises the first main pump, second main pump, 3rd main pump, left driving speed reducer motor (8), right driving speed reducer motor (9), described second main pump is identical with the 3rd main pump size, and the specification of described two motors is identical, described first main pump, second main pump, 3rd main pump is respectively by pipeline and the first banked direction control valves (1), second banked direction control valves (2), the oil-in of the 3rd banked direction control valves (3) connects, described first banked direction control valves (1), the oil return opening of the second banked direction control valves (2) and the 3rd banked direction control valves (3) is all connected with fuel tank pipeline, it is characterized in that, also comprises the first double check valve (4), second double check valve (5), first pilot operated directional control valve (6), first actuator port of described first banked direction control valves (1) first walks the first oil-in of converging valve (6) respectively by pipeline and the first row and the second oil-in is connected, and the second actuator port of described first banked direction control valves (1) first is respectively by pipeline and left driving speed reducer motor (8), the reversion hydraulic fluid port of right driving speed reducer motor (9) connects,
Described second banked direction control valves (2), the first oil-in of converging valve (6) walked by first actuator port of the 3rd banked direction control valves (3) respective first respectively by pipeline and the first row, second oil-in connects, described second banked direction control valves (2), second actuator port of the 3rd banked direction control valves (3) respective first is respectively by pipeline and left driving speed reducer motor (8), the reversion hydraulic fluid port of right driving speed reducer motor (9) connects, described the first row walks the first actuator port of converging valve (6), second actuator port is respectively by pipeline and left driving speed reducer motor (8), the rotating forward hydraulic fluid port of right driving speed reducer motor (9) connects,
The pilot control opening pipeline that first pilot control opening and the first row of described first banked direction control valves (1) walk converging valve (6) is connected.
2. a kind of super-tonnage excavator straight line moving hydraulic system according to claim 1, it is characterized in that, also comprise the second walking converging valve (7), second actuator port of described first banked direction control valves (1) first is connected respectively by walk the first oil-in of converging valve (7) and the second oil-in of pipeline and described second, described second banked direction control valves (2), second actuator port of the 3rd banked direction control valves (3) respective first is walked respectively by pipeline and described second first oil-in of converging valve (7), second oil-in connects, the walk pilot control opening pipeline of converging valve (7) of second pilot control opening and second of described first banked direction control valves (1) is connected.
3. a kind of super-tonnage excavator straight line moving hydraulic system according to claim 2, it is characterized in that, first actuator port of described first banked direction control valves (1) first, second actuator port is respectively by pipeline and the first double check valve (4), the oil-in of the second double check valve (5) connects, two oil-outs of described first double check valve (4) walk the first oil-in of converging valve (6) respectively with the first row and the second oil-in pipeline is connected, walk with second respectively first oil-in of connection of converging valve (7) and the second oil-in pipeline of two oil-outs of described second double check valve (5) connects.
4. a kind of super-tonnage excavator straight line moving hydraulic system according to any one of claims 1 to 3, is characterized in that, described second banked direction control valves (2), the 3rd banked direction control valves (3) are multichannel pressure-gradient control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420490119.7U CN204163138U (en) | 2014-08-28 | 2014-08-28 | Super-tonnage excavator straight line moving hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420490119.7U CN204163138U (en) | 2014-08-28 | 2014-08-28 | Super-tonnage excavator straight line moving hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204163138U true CN204163138U (en) | 2015-02-18 |
Family
ID=52536843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420490119.7U Active CN204163138U (en) | 2014-08-28 | 2014-08-28 | Super-tonnage excavator straight line moving hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204163138U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507362A (en) * | 2016-01-24 | 2016-04-20 | 吉林大学 | Hydraulic system of overflow-loss-free loader and control method of hydraulic system |
| CN105507361A (en) * | 2015-12-07 | 2016-04-20 | 浙江大学 | Linear walking control method and system of excavator based on images |
| CN106468294A (en) * | 2015-08-19 | 2017-03-01 | 徐工集团工程机械股份有限公司 | Straight line moving control valve, straight line moving control system and excavator |
| CN111561017A (en) * | 2020-05-28 | 2020-08-21 | 三一重机有限公司 | Power system and excavator |
| CN112196855A (en) * | 2020-09-28 | 2021-01-08 | 常德中联重科液压有限公司 | Linear walking control valve, linear walking control system and crawler-type engineering machinery |
| CN114351786A (en) * | 2021-12-25 | 2022-04-15 | 江苏汇智高端工程机械创新中心有限公司 | Hydraulic main valve and system of ultra-large mining excavator |
-
2014
- 2014-08-28 CN CN201420490119.7U patent/CN204163138U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468294A (en) * | 2015-08-19 | 2017-03-01 | 徐工集团工程机械股份有限公司 | Straight line moving control valve, straight line moving control system and excavator |
| CN106468294B (en) * | 2015-08-19 | 2018-03-13 | 徐工集团工程机械股份有限公司 | Straight line moving control valve, straight line moving control system and excavator |
| CN105507361A (en) * | 2015-12-07 | 2016-04-20 | 浙江大学 | Linear walking control method and system of excavator based on images |
| CN105507361B (en) * | 2015-12-07 | 2017-12-12 | 浙江大学 | Excavator straight line moving control method and system based on image |
| CN105507362A (en) * | 2016-01-24 | 2016-04-20 | 吉林大学 | Hydraulic system of overflow-loss-free loader and control method of hydraulic system |
| CN111561017A (en) * | 2020-05-28 | 2020-08-21 | 三一重机有限公司 | Power system and excavator |
| CN111561017B (en) * | 2020-05-28 | 2022-06-07 | 三一重机有限公司 | Power system and excavator |
| CN112196855A (en) * | 2020-09-28 | 2021-01-08 | 常德中联重科液压有限公司 | Linear walking control valve, linear walking control system and crawler-type engineering machinery |
| CN112196855B (en) * | 2020-09-28 | 2022-07-26 | 常德中联重科液压有限公司 | Linear walking control valve, linear walking control system and crawler-type engineering machinery |
| CN114351786A (en) * | 2021-12-25 | 2022-04-15 | 江苏汇智高端工程机械创新中心有限公司 | Hydraulic main valve and system of ultra-large mining excavator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204163138U (en) | Super-tonnage excavator straight line moving hydraulic system | |
| CN104033154B (en) | The TBM propulsion hydraulic system of double mode switching | |
| CN202827716U (en) | Steering electro-hydraulic control system for remote-control loader | |
| CN204590113U (en) | Medium-sized multi-way valve of hydraulic excavator group | |
| CN103603971B (en) | Multi-way valve with single oil duct and double valve elements in parallel connection and used for high-power excavator | |
| CN102888873A (en) | Device for improving linear running performance of excavator during compound action | |
| CN103806498B (en) | Excavator hydraulic system | |
| CN103213494B (en) | The double speed walking electrohydraulic control system of self-walking machinery | |
| CN105351263B (en) | A kind of differential hydro cylinder control loop | |
| CN103671364B (en) | Electrohydraulic control system is turned to for remote control loader | |
| CN202767155U (en) | Device for improving straight walking performance of excavator in the process of doing compound actions | |
| CN103498491B (en) | A kind of dipper prior control loop of excavator and control method thereof | |
| CN102400968A (en) | Hydraulic valve, hydraulic system and concrete pumping equipment | |
| CN104153786B (en) | A kind of energy-saving type shield propulsion hydraulic system adopting coaxial motor | |
| CN103015483B (en) | Time delay brake system of hydraulic slewing device and engineering machine | |
| CN110005649B (en) | Load-sensitive adjustable hydraulic system of drilling machine and drilling machine | |
| CN203939503U (en) | A kind of TBM propulsion hydraulic system of double mode switching | |
| CN105134675B (en) | A kind of hybrid power system of spraying machine pumping mechanism | |
| CN103470556A (en) | Multi-way valve converging hydraulic system and land leveler | |
| CN105805074A (en) | Three-pump confluence multi-way valve block and hydraulic excavator | |
| CN103835214A (en) | Hydraulic loop for tail door mechanism of road milling machine | |
| CN205591274U (en) | Small -size excavator combination flow control system | |
| CN106460880B (en) | The fluid pressure control device of building machinery | |
| CN203488456U (en) | Multi-way valve flow converging hydraulic system and land leveler | |
| CN203559442U (en) | Priority control circuit for bucket rod of excavating machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180425 Address after: 221000 39 Gaoxin Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee after: Xuzhou Xugong Mining Machinery Co., Ltd. Address before: 221004 39 Gaoxin Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee before: XCMG Excavator Machinery Co., Ltd. |
|
| TR01 | Transfer of patent right |