CN109296023B - Hydraulic mountain-digging machine - Google Patents
Hydraulic mountain-digging machine Download PDFInfo
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- CN109296023B CN109296023B CN201811326982.8A CN201811326982A CN109296023B CN 109296023 B CN109296023 B CN 109296023B CN 201811326982 A CN201811326982 A CN 201811326982A CN 109296023 B CN109296023 B CN 109296023B
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- valve
- arm
- breaking hammer
- pilot
- small arm
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a hydraulic mountain drill, which comprises a breaking hammer, a working small arm, a working large arm, a cab, an upper rotary platform, a lower vehicle body, a flow compensation system and a self-lubricating system. The flow compensation system comprises a small arm oil cylinder, a large arm oil cylinder and a hydraulic system of the hydraulic mountain-driving machine, wherein the small arm oil cylinder controls the movement of the working small arm, and the large arm oil cylinder controls the movement of the working large arm. The self-lubricating system is connected with the breaking hammer and comprises a compressor, a gas-water separator and an oil mist generator which are sequentially connected through a pressure hose, and an outlet of the oil mist generator is connected with a lubricating oil inlet of the breaking hammer. The invention realizes that the flow of the breaking hammer is not influenced by the actions of the big arm and the small arm when the breaking hammer works, ensures that the breaking hammer inputs stable flow, improves the use efficiency of the breaking hammer, simultaneously avoids the work of frequently filling butter into the breaking hammer, improves the work efficiency of equipment, and better plays a role in protecting the breaking hammer.
Description
Technical Field
The invention relates to the technical field of excavators, in particular to a hydraulic mountain excavator.
Background
When the traditional excavator is used together with the breaking hammer, the breaking hammer is required to operate the pressing action of the breaking hammer while being struck, and at the moment, the flow of the pump is required to be supplied to the working action of the breaking hammer and is required to be pressed down by the working arm, so that the working flow of the breaking hammer is unstable, and the working efficiency of the breaking hammer is influenced. And when the traditional excavator is matched with the breaking hammer for use, grease is required to be filled into the breaking hammer every two hours, so that the abrasion of a drill rod and a breaking hammer precursor is reduced, the filling interval period is short and tedious, and the working efficiency is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the hydraulic mountain drill, which can avoid the problem of unstable oil supply to the breaking hammer due to the pressing action of the working arm, ensure the flow stability of the breaking hammer during striking, effectively improve the production efficiency, prolong the service life of the breaking hammer, avoid the work of frequently filling butter into the breaking hammer and improve the working efficiency of equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a hydraulic mountain-driving machine comprises a breaking hammer, a working small arm, a working large arm, a cab, an upper rotary platform, a lower vehicle body, a flow compensation system and a self-lubricating system,
the flow compensation system comprises a small arm oil cylinder, a large arm oil cylinder and a hydraulic system of the hydraulic mountain-driving machine, the small arm oil cylinder controls the movement of a working small arm, the large arm oil cylinder controls the movement of a working large arm, the hydraulic system of the hydraulic mountain-driving machine comprises a main pump, an auxiliary pump, a main multi-way valve, an auxiliary multi-way valve, a large arm pilot valve, a pilot switching valve and a breaking hammer pilot valve, the main pump comprises a first main pump and a second main pump, the first main pump is respectively connected with the breaking hammer and the large arm oil cylinder through a first breaking hammer valve and a large arm valve of the main multi-way valve, the second main pump is respectively connected with the breaking hammer and the small arm oil cylinder through a second breaking hammer valve and a small arm valve of the main multi-way valve, the auxiliary pump is connected with the small arm oil cylinder and the large arm oil cylinder through the auxiliary multi-way valve, and the large arm pilot valve is connected with the large arm valve through the pilot switching, The small arm valve is connected, the big arm pilot valve and the small arm pilot valve are also connected with the auxiliary multi-way valve, the breaking hammer pilot valve is connected with the first breaking hammer valve, the second breaking hammer valve and the pilot switching valve,
the self-lubricating system is connected with the breaking hammer and comprises a compressor, a gas-water separator and an oil mist generator which are sequentially connected through a pressure hose, and an outlet of the oil mist generator is connected with a lubricating oil inlet of the breaking hammer.
Preferably, an air inlet filter is connected to the inlet of the compressor, and is used for ensuring the cleanliness of inlet air and avoiding damage caused by the suction of dirty air by the compressor.
Preferably, an unloading valve is arranged between the compressor and the gas-water separator and used for preventing the compressed gas in the system from generating excessive pressure to damage parts.
Preferably, the compressor outputs compressed gas of 6bar, and the unloading pressure of the unloading valve is 8 bar.
And optimally, the first breaking hammer valve, the second breaking hammer valve, the big arm valve, the small arm valve, the pilot switching valve and the auxiliary multi-way valve are all provided with bypass valve core transposition oil inlets and are used for controlling the opening/closing of the first breaking hammer valve, the second breaking hammer valve, the big arm valve, the small arm valve, the pilot switching valve and the auxiliary multi-way valve.
And as optimization, the large and small arm pilot valves are respectively connected with the large arm valve and the bypass valve core transposition oil inlets of the small arm valve through the oil outlets of the pilot switching valve, the large and small arm pilot valves are also connected with the bypass valve core transposition oil inlets of the auxiliary multi-way valve, and the breaking hammer pilot valves are connected with the first breaking hammer valve, the second breaking hammer valve and the bypass valve core transposition oil inlets of the pilot switching valve.
Preferably, the auxiliary multi-way valve comprises a first auxiliary multi-way valve and a second auxiliary multi-way valve, the auxiliary pump is connected with the small arm oil cylinder and the small arm valve through the first auxiliary multi-way valve, and the auxiliary pump is connected with the large arm oil cylinder and the large arm valve through the second auxiliary multi-way valve.
As an optimization, the big and small arm pilot valves include a big arm pilot valve and a small arm pilot valve, and the pilot switching valve includes a first pilot switching valve and a second pilot switching valve; the large arm pilot valve is connected with an oil inlet of the first pilot switching valve, and the small arm pilot valve is connected with an oil inlet of the second pilot switching valve.
Preferably, when the breaking hammer does not work, the breaking hammer pilot valve controls the first breaking hammer valve and the second breaking hammer valve to be closed, a valve core of the pilot switching valve is in a self-resetting state, the big arm pilot valve and the small arm pilot valve control the big arm valve and the small arm valve through the pilot switching valve and control the auxiliary multi-way valve to open the valve cores of the big arm valve, the small arm valve and the auxiliary multi-way valve, the main pump and the auxiliary pump respectively output pressure oil through the big arm valve, the small arm valve and the auxiliary valve and supply the pressure oil to the small arm oil cylinder and the big arm oil cylinder after being connected and converged through pipelines, and the big arm action and the small arm action are completed.
As optimization, when the breaking hammer works, the breaking hammer pilot valve controls the first breaking hammer valve and the second breaking hammer valve to be opened and controls the pilot switching valve to close the valve core, so that the big arm pilot valve and the small arm pilot valve cannot control the big arm valve and the small arm valve to be opened, the big arm valve and the small arm valve are in a closed state, the auxiliary pump provides pressure oil through the auxiliary multi-way valve, and the oil is supplied to the small arm oil cylinder and the big arm oil cylinder through pipeline connection, so that big arm action and small arm action are completed; the main pump provides pressure oil through the first breaking hammer valve and the second breaking hammer valve, and the pressure oil is connected with the second breaking hammer valve through a pipeline to supply oil to the breaking hammer.
The invention has the beneficial effects that:
the invention realizes that the flow of the breaking hammer is not influenced by the actions of the big arm and the small arm when the breaking hammer works, ensures that the breaking hammer inputs stable flow, improves the use efficiency of the breaking hammer, simultaneously avoids the work of frequently filling butter into the breaking hammer, improves the work efficiency of equipment, and better plays a role in protecting the breaking hammer.
Drawings
Fig. 1 is a schematic structural view of a hydraulic mountain drill according to the present invention.
Fig. 2 is a system schematic of a flow compensation system.
Fig. 3 is a schematic diagram of the flow compensation system when the demolition hammer is not in operation.
Fig. 4 is a schematic diagram of the flow compensation system when the demolition hammer is in operation.
Fig. 5 is a diagram of the composition of the self-lubricating system.
In the drawing, 1 is a main pump, 11 is a first main pump, 12 is a second main pump, 2 is a sub pump, 3 is a main multi-way valve, 31 is a first hammer valve, 32 is a second hammer valve, 33 is a big arm valve, 331 is a big arm cylinder, 34 is a small arm valve, 341 is a small arm cylinder, 4 is a sub multi-way valve, 41 is a first sub multi-way valve, 42 is a second sub multi-way valve, 5 is a big arm pilot valve, 51 is a big arm pilot valve, 52 is a small arm pilot valve, 6 is a pilot switching valve, 7 is a hammer pilot valve, 71 is a hammer, 72 is an oil mist generator, 73 is an air-water separator, 74 is an unloading valve, 75 is a compressor, 76 is an intake filter, 8 is a cab, 81 is an upper vehicle rotating platform, 82 is a lower vehicle body, 83 is a working small arm, and 84 is a working big arm.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the hydraulic mountain drill comprises a breaking hammer 71, a working small arm 83, a working large arm 84, a cab 8, an upper vehicle rotating platform 81, a lower vehicle body 82, a flow compensation system and a self-lubricating system.
Referring to the flow compensation system shown in fig. 2, the flow compensation system comprises a small arm cylinder 341, a large arm cylinder 331 and a hydraulic system of the hydraulic mountain-opening machine, wherein the small arm cylinder 341 controls the movement of the working small arm 83, and the large arm cylinder 331 controls the movement of the working large arm 84. The hydraulic system of the hydraulic mountain-opening machine comprises a main pump 1, an auxiliary pump 2, a main multi-way valve 3, an auxiliary multi-way valve 4, a big arm pilot valve 5, a small arm pilot valve 5, a pilot switching valve 6 and a breaking hammer pilot valve 7, wherein the big arm pilot valve 5 comprises a big arm pilot valve 51 and a small arm pilot valve 52, the pilot switching valve 6 comprises a first pilot switching valve 61 and a second pilot switching valve 62, and the auxiliary multi-way valve 4 comprises a first auxiliary multi-way valve 41 and a second auxiliary multi-way valve 42. The main pump 1 comprises a first main pump 11 and a second main pump 12, the first main pump 11 is respectively connected with the breaking hammer 71 and the boom cylinder 331 through a first breaking hammer valve 31 and a boom valve 33 of the main multi-way valve 3, and the first main pump 1 supplies oil to the breaking hammer 71 through the first breaking hammer valve 31 and supplies oil to the boom cylinder 331 through the boom valve 33. The second main pump 12 is connected to the hammer 71 and the arm cylinder 341 through the second hammer valve 32 and the arm valve 34 of the main multi-way valve 3, respectively, and the second main pump 12 supplies oil to the hammer 71 through the second hammer valve 32 and the arm cylinder 341 through the arm valve 34. The sub pump 2 is connected to the arm cylinder 341 through the first sub multiplex valve 41 and connected to the arm cylinder 331 through the second sub multiplex valve 42. The first hammer valve 31, the second hammer valve 32, the big arm valve 33, the small arm valve 34, the first pilot switching valve 61, the second pilot switching valve 62, the first sub multi-way valve 41, and the second sub multi-way valve 42 are all provided with bypass spool shifting oil inlets. The big arm pilot valve 51 is connected with a bypass valve core transposition oil inlet of the big arm valve 33 through an oil outlet of the first pilot switching valve 61 and is used for controlling the opening/closing of the big arm valve 33; the large arm pilot valve 51 is also connected with a bypass valve core transposition oil inlet of the second auxiliary multi-way valve 42 and is used for controlling the opening/closing of the second auxiliary multi-way valve 42. The small arm pilot valve 52 is connected with the bypass valve core transposition oil inlet of the small arm valve 34 through the oil outlet of the second pilot switching valve 62, and is used for controlling the opening/closing of the small arm valve; the small arm pilot valve is also connected with a bypass valve core transposition oil inlet of the first auxiliary multi-way valve 41 and is used for controlling the opening/closing of the first auxiliary multi-way valve 41. The hammer pilot valve 7 is connected to the first hammer valve 31, the second hammer valve 32, and a bypass spool transposition oil inlet of the pilot switching valve 6, and is configured to control opening/closing of the first hammer valve 31, the second hammer valve 32, and the pilot switching valve 6.
Referring to fig. 3, the breaking hammer 71 is not operated. The black dotted line is a route of pilot oil control pilot valve, and the black solid line is a control route of main pump and auxiliary pump to small arm valve, large arm valve and breaking hammer valve. The hammer pilot valve 7 is not operated, the first hammer valve 32 and the second hammer valve 31 are closed, then the valve core of the pilot switching valve 6 is in a self-resetting state, a pilot pump (not shown) supplies oil to the big arm pilot valve 5 and the small arm pilot valve 5, the pilot oil of the big arm pilot valve 5 and the small arm pilot valve 34 is simultaneously controlled by the pilot switching valve 6, meanwhile, the auxiliary multi-way valve 4 is also controlled, the valve core corresponding to the valve plate is opened, at the moment, the main pump 1 and the auxiliary pump 2 respectively output pressure oil through the big arm valve 33, the small arm valve 34 and the auxiliary valve 4, and the pressure oil is supplied to the small arm oil cylinder 341 and the big arm oil cylinder 331 after being connected and converged through pipelines, so that the big arm action and the small arm action are completed. The main multi-way valve 3 is supplied with pressure oil by the main pump 1, and the auxiliary multi-way valve 4 is supplied with pressure oil by the auxiliary pump 2, so that the main pump and the auxiliary pump supply oil to complete the operation of the large arm and the small arm at the moment.
Referring to fig. 4, the breaking hammer 71 operates. The black dotted line is a route of pilot oil control pilot valve, and the black solid line is a control route of main pump and auxiliary pump to small arm valve, large arm valve and breaking hammer valve. When the hammer pilot valve 7 is operated, the hammer pilot valve 7 outputs pilot oil to control the first hammer valve 31 and the second hammer valve 32 of the main multi-way valve 3, the first hammer valve 31 and the second hammer valve 32 are in an open state, so that the main pump 1 supplies oil to the hammer 71, the hammer 71 starts to work, and the hammer pilot valve 7 also controls the pilot switching valve 6 to change the spool and close the spool at the same time, because the pilot switching valve 6 is in a switching state, when the pilot pump (not shown in the figure) supplies oil to the big arm pilot valve 5, the pilot oil only controls the auxiliary multi-way valve 4 through the pilot switching valve 6 to open the spool, the big arm valve 33 and the small arm valve 34 in the main multi-way valve 3 are not controlled any more, and the big arm valve 33 and the small arm valve 34 are in a closed state at the same time, and the auxiliary pump 2 supplies pressure oil through the auxiliary multi-way valve 4 at the same time, the main pump 1 does not participate in the oil supply of the small arm oil cylinder 341 and the large arm oil cylinder 331 because the main pump does not control the main multi-way valve 3 any more, and in this working state, the main pump 1 only supplies pressure oil to the 71 breaking hammer, and the auxiliary pump 2 only supplies oil to the small arm oil cylinder 341 and the large arm oil cylinder 331.
Referring to fig. 5, an automatic lubrication system is shown. The compressor 75 is self-contained in the engine, when the engine runs, the compressor 75 starts to work, clean air filtered normally is sucked in through the air inlet filter 76, the air inlet filter 76 ensures the cleanliness of the inlet air, the compressor 75 is prevented from being damaged due to the suction of dirty air, the compressor 75 outputs 6bar compressed air, an unloading valve 74 is arranged at the outlet of the compressed air, the unloading valve 74 is provided with unloading pressure of 8bar, when the pressure of the compressed air in the system exceeds 8bar, the air is automatically discharged into the atmosphere, the compressed air in the system is prevented from generating overhigh pressure to damage parts, then the compressed air is connected with the inlet of the air-water separation port 73 through a pressure-resistant pipe, the air-water separator 73 automatically separates moisture in the compressed air, dry compressed air is output at the outlet, and the reason for removing the moisture of the compressor 75 is that the moisture is prevented from entering the breaking hammer 71, causing corrosion inside the breaking hammer which will seriously damage the breaking hammer. The outlet of the gas-water separator 73 is directly connected with the inlet of the oil mist generator 72, dry compressed gas output by the gas-water separator 73 enters the oil mist generator 72, clean hydraulic oil is added in the oil mist generator 72, oil-gas mixed gas is generated by the hydraulic oil and the compressed gas and is output from the outlet of the oil mist generator 72, the outlet of the oil mist generator 72 is connected to the lubricating oil inlet of the breaking hammer 71 through a pressure-resistant hose, the oil-gas mixed gas enters the breaking hammer 71 through the lubricating oil inlet of the breaking hammer and plays a role in lubricating the hammer rod and the front sleeve, so that the breaking hammer is not required to be lubricated by filling butter every two hours, the work of frequently filling the butter into the breaking hammer is avoided, the working efficiency of equipment is improved, and the breaking hammer is better protected.
Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A hydraulic mountain-driving machine comprises a breaking hammer, a working small arm, a working large arm, a cab, an upper rotary platform and a lower vehicle body, and is characterized by also comprising a flow compensation system and a self-lubricating system,
the flow compensation system comprises a small arm oil cylinder, a large arm oil cylinder and a hydraulic system of the hydraulic mountain-driving machine, the small arm oil cylinder controls the movement of a working small arm, the large arm oil cylinder controls the movement of a working large arm, the hydraulic system of the hydraulic mountain-driving machine comprises a main pump, an auxiliary pump, a main multi-way valve, an auxiliary multi-way valve, a large arm pilot valve, a pilot switching valve and a breaking hammer pilot valve, the main pump comprises a first main pump and a second main pump, the first main pump is respectively connected with the breaking hammer and the large arm oil cylinder through a first breaking hammer valve and a large arm valve of the main multi-way valve, the second main pump is respectively connected with the breaking hammer and the small arm oil cylinder through a second breaking hammer valve and a small arm valve of the main multi-way valve, the auxiliary pump is connected with the small arm oil cylinder and the large arm oil cylinder through the auxiliary multi-way valve, and the large arm pilot valve is connected with the large arm valve through the pilot switching, The small arm valve is connected, the big arm pilot valve and the small arm pilot valve are also connected with the auxiliary multi-way valve, the breaking hammer pilot valve is connected with the first breaking hammer valve, the second breaking hammer valve and the pilot switching valve,
the self-lubricating system is connected with the breaking hammer and comprises a compressor, a gas-water separator and an oil mist generator which are sequentially connected through a pressure hose, and an outlet of the oil mist generator is connected with a lubricating oil inlet of the breaking hammer.
2. The hydraulic mountain drill as claimed in claim 1, wherein an intake filter is connected to an inlet of the compressor for ensuring intake cleanliness and preventing damage due to dirty air sucked by the compressor.
3. The hydraulic mountain drill as claimed in claim 1, wherein an unloading valve is provided between the compressor and the gas-water separator to prevent the compressed gas in the system from generating excessive pressure to damage the components.
4. The hydraulic mountain drill according to claim 3, wherein the compressor outputs compressed gas at 6bar and the unloading valve unloads compressed gas at 8 bar.
5. The hydraulic mountain drill according to claim 1, wherein the first breaking hammer valve, the second breaking hammer valve, the big arm valve, the small arm valve, the pilot switching valve and the auxiliary multi-way valve are provided with bypass valve core transposition oil inlets for controlling the opening/closing of the first breaking hammer valve, the second breaking hammer valve, the big arm valve, the small arm valve, the pilot switching valve and the auxiliary multi-way valve.
6. The hydraulic mountain drill according to claim 5, wherein the big and small arm pilot valves are connected to the bypass spool transposition oil inlets of the big arm valve and the small arm valve through the oil outlets of the pilot switching valve, the big and small arm pilot valves are further connected to the bypass spool transposition oil inlets of the sub-multiplex valve, and the hammer valve is connected to the first hammer valve, the second hammer valve and the bypass spool transposition oil inlets of the pilot switching valve.
7. The hydraulic mountain drill as claimed in claim 1, wherein the sub-multiplex valve comprises a first sub-multiplex valve and a second sub-multiplex valve, the sub-pump is connected to the arm cylinder and the arm valve through the first sub-multiplex valve, and the sub-pump is connected to the arm cylinder and the arm valve through the second sub-multiplex valve.
8. The hydraulic mountain drill of claim 1, wherein the big and small arm pilot valves comprise a big arm pilot valve and a small arm pilot valve, and the pilot switching valve comprises a first pilot switching valve and a second pilot switching valve; the large arm pilot valve is connected with an oil inlet of the first pilot switching valve, and the small arm pilot valve is connected with an oil inlet of the second pilot switching valve.
9. The hydraulic mountain drill according to claim 1, wherein when the hammer is not in operation, the hammer pilot valve controls the first and second hammer valves to close, the spool of the pilot switching valve is in a self-resetting state, the big and small arm pilot valve controls the big arm valve and the small arm valve through the pilot switching valve and controls the sub-multi-way valve to open the spools of the big arm valve, the small arm valve and the sub-multi-way valve, and the main pump and the sub-pump respectively output pressure oil through the big arm valve, the small arm valve and the sub-multi-way valve and supply the pressure oil to the small arm cylinder and the big arm cylinder after being connected and combined through the pipeline to complete the big and small arm action.
10. The hydraulic mountain drill according to claim 1, wherein when the breaking hammer works, the breaking hammer pilot valve controls the first breaking hammer valve and the second breaking hammer valve to be opened, and controls the pilot switching valve to close the valve core, so that the big arm pilot valve and the small arm pilot valve cannot control the big arm valve and the small arm valve to be opened, the big arm valve and the small arm valve are in a closed state, the auxiliary pump supplies pressure oil through the auxiliary multi-way valve and supplies oil to the small arm oil cylinder and the big arm oil cylinder through a pipeline connection, and the big arm action and the small arm action are completed; the main pump provides pressure oil through the first breaking hammer valve and the second breaking hammer valve, and the pressure oil is connected with the second breaking hammer valve through a pipeline to supply oil to the breaking hammer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811326982.8A CN109296023B (en) | 2018-11-08 | 2018-11-08 | Hydraulic mountain-digging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811326982.8A CN109296023B (en) | 2018-11-08 | 2018-11-08 | Hydraulic mountain-digging machine |
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| CN109296023A CN109296023A (en) | 2019-02-01 |
| CN109296023B true CN109296023B (en) | 2021-03-12 |
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| CN201811326982.8A Active CN109296023B (en) | 2018-11-08 | 2018-11-08 | Hydraulic mountain-digging machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022021993A1 (en) * | 2020-07-25 | 2022-02-03 | 何泽康 | Breaking hammer having single-shaft supporting and guiding effects |
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| RU2398076C1 (en) * | 2009-07-13 | 2010-08-27 | Открытое акционерное общество "Уральское конструкторское бюро транспортного машиностроения" | Hydraulic system of wheel excavator |
| CN202023214U (en) * | 2011-04-29 | 2011-11-02 | 烟台艾迪精密机械有限公司 | Self-lubricating hydraulic breaking hammer |
| KR20120074778A (en) * | 2010-12-28 | 2012-07-06 | 두산모트롤주식회사 | Flow controll device for axial piston pump with emergency device |
| CN202882751U (en) * | 2012-11-16 | 2013-04-17 | 湖南江麓重工科技有限公司 | Improved rock drill hydraulic system based on excavator hydraulic system |
| WO2015108216A1 (en) * | 2014-01-17 | 2015-07-23 | 볼보 컨스트럭션 이큅먼트 에이비 | Drive control apparatus for construction machine |
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2018
- 2018-11-08 CN CN201811326982.8A patent/CN109296023B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2398076C1 (en) * | 2009-07-13 | 2010-08-27 | Открытое акционерное общество "Уральское конструкторское бюро транспортного машиностроения" | Hydraulic system of wheel excavator |
| KR20120074778A (en) * | 2010-12-28 | 2012-07-06 | 두산모트롤주식회사 | Flow controll device for axial piston pump with emergency device |
| CN202023214U (en) * | 2011-04-29 | 2011-11-02 | 烟台艾迪精密机械有限公司 | Self-lubricating hydraulic breaking hammer |
| CN202882751U (en) * | 2012-11-16 | 2013-04-17 | 湖南江麓重工科技有限公司 | Improved rock drill hydraulic system based on excavator hydraulic system |
| WO2015108216A1 (en) * | 2014-01-17 | 2015-07-23 | 볼보 컨스트럭션 이큅먼트 에이비 | Drive control apparatus for construction machine |
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