CN103806482B - Auxiliary power energy-saving device of excavator - Google Patents
Auxiliary power energy-saving device of excavator Download PDFInfo
- Publication number
- CN103806482B CN103806482B CN201410102328.4A CN201410102328A CN103806482B CN 103806482 B CN103806482 B CN 103806482B CN 201410102328 A CN201410102328 A CN 201410102328A CN 103806482 B CN103806482 B CN 103806482B
- Authority
- CN
- China
- Prior art keywords
- excavator
- cylinder
- hydraulic cylinder
- auxiliary power
- control valve
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- 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
- E02F9/2271—Actuators and supports therefor and protection therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
Abstract
The invention relates to the field of excavators and particularly relates to an auxiliary power energy-saving device of an excavator. The auxiliary power energy-saving device of the excavator comprises a double-cylinder connecting seat, a nitrogen cylinder, a hydraulic cylinder and a control valve; the nitrogen cylinder and the hydraulic cylinder are fixed on and arranged in parallel on the double-cylinder connecting seat; one end of the nitrogen cylinder, in which hydraulic oil is loaded, is connected with one end of the hydraulic cylinder through the control valve; an air filling hole is formed in the other end of the nitrogen cylinder. According to the auxiliary power energy-saving device of the excavator, the piston rod of the hydraulic cylinder is attached to the large arm of the excavator, the cylinder barrel of the hydraulic cylinder is arranged on the base of the excavator, the nitrogen cylinder is used for supplying propelling force to the hydraulic cylinder, power is controlled through the control valve, the entire device does not use the power of the engine of the excavator, and that the lifting force of the large arm of the excavator is increased under the condition of not consuming the power of the excavator is achieved. Therefore, the volume of a scraper pan and the length of the working arm are increased, and the working efficiency and the working radius are further increased.
Description
Technical field
The present invention relates to excavator field, in particular to a kind of excavator auxiliary power energy saver.
Background technology
Excavator, also known as excavation machinery (excavating machinery), is excavate higher or lower than the material holding machine side with scraper bowl, and loads haulage vehicle or unload the earth moving plant to rickyard.Material mainly soil, coal, silt and the Soil and Rock after pre-pine that excavator excavates.From the development of engineering machinery in recent years, the development of excavator is relatively very fast, and excavator has become one of topmost engineering machinery in engineering construction.
Along with the quickening of people's rhythm of life, to the raising that quality of life requires, also require more and more higher to the service efficiency of excavator.What-the-hell could the efficiency of more effective raising excavator, the way of people differs, and has plenty of increase engine power, and the speed in the hope of the extension and contraction that can make big arm of digger is improved; Have plenty of increase dipper capacity, in the hope of can when excavating each time can more than enough excavation some.These modes all improve operating efficiency in certain degree, but such raising is but what to reduce application life of excavator be cost.That is, the power increasing motor, while increase, also accelerates the consumption of motor, decreases the application life of motor; While adding dipper capacity, too increase resistance during large arm work, simultaneously, enough power is had to carry out work in order to make large arm, just must improve the power of motor, thus exacerbate the consumption of motor, decrease the application life of large arm and motor simultaneously.
Can could so how on earth while not reducing excavator application life, improve again the operating efficiency of excavator? this has become the new research topic of of people.
Summary of the invention
The object of the present invention is to provide a kind of excavator auxiliary power energy saver, to solve the above problems.
Provide a kind of excavator auxiliary power energy saver in an embodiment of the present invention, comprise twin-tub Connection Block, nitrogen cylinder, hydraulic cylinder and control valve;
Nitrogen cylinder and hydraulic cylinder are fixed and are set in parallel on twin-tub Connection Block;
Nitrogen cylinder is connected with one end of hydraulic cylinder by control valve built with one end of hydraulic oil;
The other end of nitrogen cylinder is provided with injecting hole.
Further, control valve is connected with the control system of excavator by pilot control pipe.
Further, the two ends of hydraulic cylinder are connected in parallel by the elevating ram of the large arm of axle ear and excavator.
Further, one end that hydraulic cylinder is connected with control valve is provided with fuel outlet;
And/or,
One end that nitrogen cylinder is connected with control valve is provided with fuel outlet.
Further, hydraulic cylinder is provided with exhaust opening away from the one end be connected with control valve.
Further, injecting hole is provided with integrating control block.
Further, integrating control block comprises pressure meter, adds gas control valve and exhaust pressure relief valve.
Further, connect and be sealing and be rigidly connected.
Excavator auxiliary power energy saver of the present invention, the piston rod of hydraulic cylinder is attached in the large arm of excavator, the cylinder barrel of hydraulic cylinder is arranged on the base of excavator, motive force is provided to hydraulic cylinder by nitrogen cylinder, by control valve, power is controlled, the power of the whole device not motor of usage mining machine, thus realize when not consuming excavator power, add the lifting force of big arm of digger, thus the volume of scraper bowl and the length of working arm can be increased, further increase operating efficiency and the radius of clean-up.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in detailed description of the invention or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is embodiment of the present invention excavator auxiliary power energy saver structural representation.
In figure, 1: upper connecting axle ear; 2: hydraulic cylinder; 3: exhaust opening; 4: rod chamber; 5: piston rod; 6: cylinder barrel; 7: twin-tub Connection Block; 8: rodless cavity; 9: fuel outlet; 10: lower connecting axle ear; 11: pilot control pipe; 12: control valve; 13: fluid room; 14: nitrogen chamber; 15: nitrogen cylinder; 16: injecting hole; 17: integrating control block.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, carry out clear, complete description by technical scheme of the present invention below.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those skilled in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
As shown in Figure 1, the invention provides excavator auxiliary power energy saver, comprise twin-tub Connection Block 7, nitrogen cylinder 15, hydraulic cylinder 2 and control valve 12;
Nitrogen cylinder 15 and hydraulic cylinder 2 are fixed and are set in parallel on twin-tub Connection Block 7;
Nitrogen cylinder 15 is connected with one end of hydraulic cylinder 2 by control valve 12 built with one end of hydraulic oil;
The other end of nitrogen cylinder 15 is provided with injecting hole 16.
Nitrogen is stable inert gas, starts to widely use in fields such as household electrical appliances, furniture, automobiles.Nitrogen spring volume is little, elastic force is large, stroke is long, stable working, manufacture accurate, long service life (1,000,000 times), spring curve is mild, and not needing pretension etc., it has the work that the common elastic assemblies such as metal spring, rubber and air cushion have been difficult to.But large-scale nitrogen spring system manufacture difficulty is large, and precision is high, and cost is high.Then the characteristic of nitrogen is used to make the assembly of nitrogen and hydraulic system, nitrogen energy storage canister, i.e. nitrogen cylinder 15.The similar communicating vessel device using nitrogen cylinder 15 and hydraulic cylinder 2 to form, plays the auxiliary power of the lifting of the equipment of excavator and the recoverable effect of gesture of decline.
First inject the hydraulic oil of aequum to nitrogen cylinder 15 by injecting hole 16, then inject the nitrogen of required pressure to nitrogen cylinder 15 from injecting hole 16, afterwards injecting hole 16 is sealed.
Nitrogen cylinder 15 is connected with hydraulic cylinder 2 by control valve 12, more whole device is in parallel with the large arm of excavator, but belongs to autonomous system, is not connected with excavator hydraulic system, has safety, independence, novelty and convenience.Whole device, with the passive action of large arm, can not affect excavator human users.In lifting process, pressure is delivered in the rodless cavity 8 of hydraulic cylinder 2 by hydraulic oil by the high pressure nitrogen in nitrogen cylinder 15, for large arm lifting provides auxiliary power, when high power work, avoids motor because crossing the problem of sub operation generation over-emitting black exhaust.In decline process, when not affecting former excavator potential energy recovery system and the work of flow regenerative system, by nitrogen cushioning effect, further the unnecessary heat energy that the potential energy that large arm declines produces is offset, reduce the loss to each parts of excavator, increase application life.Control valve 12 is arranged on the rodless cavity root of oil cylinder, controls flow, plays large arm and prevents falling locking effect, have very big effect for excavator work safety in large arm stopped process.
It should be noted that in whole process, the height of the hydraulic oil in nitrogen cylinder 15 is higher than the height of the pipeline be connected with control valve 12, and the hydraulic oil in nitrogen cylinder 15 can be made to enter smoothly in hydraulic cylinder 2.
Further, control valve 12 is connected with the control system of excavator by pilot control pipe 11.
Control valve 12 is linked together by the control system of pilot control pipe 11 with excavator, thus the dynamical system perfect adaptation of whole auxiliary power energy saver and excavator can be made.
Further, the two ends of hydraulic cylinder 2 are connected in parallel by the elevating ram of the large arm of axle ear and excavator.
The one end away from cylinder barrel 6 arranges upper connecting axle ear 1 for the piston rod 5 of hydraulic cylinder 2, and cylinder barrel 6 arranges lower connecting axle ear 10 away from one end of piston rod 5.Upper connecting axle ear 1 is connected with in the large arm of excavator by bearing pin with lower connecting axle ear 10, and is in parallel with the elevating ram in large arm, thus is installed on board a dredger by hydraulic cylinder 2.
It is pointed out that hydraulic cylinder 2 can be connected with excavator by axle ear, also can be connect by other modes, as long as hydraulic cylinder 2 can be arranged in the large arm of excavator by it, and hydraulic cylinder 2 can be made to be piston rod 5 actions with the action of large arm.
Further, one end that hydraulic cylinder 2 is connected with control valve 12 is provided with fuel outlet 9;
And/or,
One end that nitrogen cylinder 15 is connected with control valve 12 is provided with fuel outlet 9.
The lower end of nitrogen cylinder 15 and/or hydraulic cylinder 2, one end that namely hydraulic oil is housed is provided with fuel outlet 9, after whole device service time comparatively for a long time, need to overhaul device, now, hydraulic oil in nitrogen cylinder 15 and hydraulic cylinder 2 is discharged the maintenance be more conducive to nitrogen cylinder 15 and hydraulic cylinder 2, thus avoid undetected place to occur.
Further, hydraulic cylinder 2 is provided with exhaust opening 3 away from the one end be connected with control valve 12.
Same reason, when overhauling device, can be discharged the hydraulic oil in device by rodless cavity 8, can also be discharged by the nitrogen in nitrogen cylinder by exhaust opening 3.
Exhaust opening 3 is arranged on the rod chamber 4 of hydraulic cylinder, then rod chamber 4 is communicated with the nitrogen chamber 14 of nitrogen cylinder 15 by pipeline, like this by the movement of piston rod 5, the nitrogen in nitrogen cylinder 15 can be accelerated to discharge.
Further, injecting hole 16 is provided with integrating control block 17.
Injecting hole 16 arranges integrating control block 17, various control can be carried out in nitrogen cylinder 15.As pressure, as nitrogen amount, as hydraulic pressure oil mass etc.By a series of state modulator, more effectively can know the service condition of whole auxiliary power energy saver, thus judgement when the various faults of device are produced can be conducive to.
Further, integrating control block 17 includes pressure meter, adds gas control valve and exhaust pressure relief valve.
Pressure is the necessary parameter that whole device uses, when the pressure in nitrogen cylinder 15 is after zero, whole device just cannot play the effect of auxiliary power, just need to supplement power timely, hydraulic oil oil-feed liquid chamber 13 namely in supplementary nitrogen cylinder 15 or the nitrogen in supplementary nitrogen cylinder 15 enter nitrogen chamber 14, thus increase the pressure of nitrogen cylinder 15.
Gas control valve will be added and exhaust pressure relief valve is arranged in integrating control block 17, aerating efficiency and the exhaust efficiency of nitrogen cylinder 15 can be strengthened.
Further, connect and be sealing and be rigidly connected.
Because whole device is that the pressure produced by gas and liquid carries out auxiliary movement to the large arm of excavator, therefore, the connection of each junction all needs to carry out encapsulation process, otherwise be no matter the insufficient pressure that the leakage of gas or the leakage part of hydraulic oil can cause auxiliary power energy saver, thus the effect of auxiliary power can not be played.
By being rigidly connected, whole device effectively can be combined into an entirety.
Whole device is in initial, nitrogen in nitrogen chamber 14 has pressure, in the process that the large arm of excavator is upheld, motor driven large arm promotes, now, the control valve 12 of the control system control auxiliary power energy saver of excavator is opened, under making the pressure effect of the hydraulic oil nitrogen in nitrogen chamber 14 in nitrogen cylinder 15, by in the rodless cavity 8 of the hydraulic oil pressure inlet hydraulic cylinder 2 in fluid room 13, thus the piston rod 5 ordering about hydraulic cylinder 2 stretches out in the cylinder barrel 6 of hydraulic cylinder 2, serves auxiliary dynamic action to the lifting of the large arm of excavator.
In the process that the large arm of excavator declines, large arm declines due to gravity, the piston rod 5 of compression hydraulic cylinder 2, in the process that piston rod 5 presses down, extruded by hydraulic oil in rodless cavity 8, enter in the fluid room 13 of nitrogen cylinder 15 by connecting pipe, the hydraulic oil in fluid room 13 increases, being compressed by nitrogen in nitrogen chamber 14, is that extension next time stores pressure from making nitrogen.
Whole device is independent sealed environment, but when Long-Time Service causes oil sealing aging, hydraulic oil can be overflowed by oil sealing gap, and when arriving critical point, nitrogen overflows, failure of apparatus.Can device in parallel with big arm of digger, oil cylinder oil spilling is very easy to find, can in time by device dismounting and change oil sealing.Cause failure of apparatus even if fail Timeliness coverage, nitrogen overflows the security system that also can not affect excavator self, and the nitrogen of spilling does not also affect environment, and device only needs dismounting and change accessory just can continue to use, and does not have potential safety hazard.Stand-alone device makes excavator can not have an impact to this device when breaking down, and this device in excavator maintenance and can also play auxiliary security function when breaking down.
Excavator auxiliary power energy saver of the present invention, the piston rod of hydraulic cylinder 2 is attached in the large arm of excavator, the cylinder barrel of hydraulic cylinder 2 is arranged on the base of excavator, improve power to hydraulic cylinder 2 by nitrogen cylinder 15, controlled by control valve 12 pairs of power, the power of the whole device not motor of usage mining machine, thus realize when not consuming excavator power, add the lifting force of big arm of digger, thus volume and the boom length of scraper bowl can be increased, further increase operating efficiency and the radius of clean-up; Simultaneously in operation process, the gravitional force of equipment also gets the greatest degree of optimization, and does not consume extra mechanical energy, both saves energy, additionally reduces the dynamic loading at the places such as the heating of hydraulic system and floating bearing; Under the prerequisite that machine heavy phase is same, job stabilization improves, and can obtain larger operating radius or dipper capacity, and this has very important meaning to raising performance, fuel saving etc.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an excavator auxiliary power energy saver, is characterized in that, comprises twin-tub Connection Block, nitrogen cylinder, hydraulic cylinder and control valve;
Described nitrogen cylinder and described hydraulic cylinder are fixed and are set in parallel on described twin-tub Connection Block;
Described nitrogen cylinder is connected with one end of described hydraulic cylinder by described control valve built with one end of hydraulic oil;
The other end of described nitrogen cylinder is provided with injecting hole.
2. excavator auxiliary power energy saver according to claim 1, it is characterized in that, described control valve is connected with the control system of excavator by pilot control pipe.
3. excavator auxiliary power energy saver according to claim 2, is characterized in that, the two ends of described hydraulic cylinder are connected in parallel by the elevating ram of the large arm of axle ear and excavator.
4. excavator auxiliary power energy saver according to claim 3, it is characterized in that, one end that described hydraulic cylinder is connected with described control valve is provided with fuel outlet;
And/or,
One end that described nitrogen cylinder is connected with control valve is provided with fuel outlet.
5. excavator auxiliary power energy saver according to claim 4, is characterized in that, described hydraulic cylinder is provided with exhaust opening away from the one end be connected with described control valve.
6. excavator auxiliary power energy saver according to claim 5, is characterized in that, described injecting hole is provided with integrating control block.
7. excavator auxiliary power energy saver according to claim 6, is characterized in that, described integrating control block includes pressure meter, adds gas control valve and exhaust pressure relief valve.
8. the excavator auxiliary power energy saver according to any one of claim 1-7, it is characterized in that, all connections are sealing and are rigidly connected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102328.4A CN103806482B (en) | 2014-03-19 | 2014-03-19 | Auxiliary power energy-saving device of excavator |
| PCT/CN2015/071542 WO2015139530A1 (en) | 2014-03-19 | 2015-01-26 | Auxiliary power energy-saving device of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102328.4A CN103806482B (en) | 2014-03-19 | 2014-03-19 | Auxiliary power energy-saving device of excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103806482A CN103806482A (en) | 2014-05-21 |
| CN103806482B true CN103806482B (en) | 2015-02-18 |
Family
ID=50703834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410102328.4A Expired - Fee Related CN103806482B (en) | 2014-03-19 | 2014-03-19 | Auxiliary power energy-saving device of excavator |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103806482B (en) |
| WO (1) | WO2015139530A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806482B (en) * | 2014-03-19 | 2015-02-18 | 樊硕 | Auxiliary power energy-saving device of excavator |
| CN104832490B (en) * | 2015-05-05 | 2017-06-06 | 樊硕 | Super-pressure nitrogen energy-conservation auxiliary cylinders |
| CN106429944B (en) * | 2016-11-01 | 2019-02-15 | 沈阳双壹市政工程有限公司 | A kind of gas lifting jack for excavator |
| CN109372042A (en) * | 2018-12-17 | 2019-02-22 | 程春雷 | The hydraulic crawler excavator device that swing arm self weight is offset |
| WO2021035477A1 (en) | 2019-08-26 | 2021-03-04 | Guangxi Liugong Machinery Co., Ltd. | Electric excavator |
| GB2588116B (en) * | 2019-10-07 | 2022-02-23 | Caterpillar Global Mining Llc | Method and apparatus for operating a machine work tool |
| CN113494108B (en) * | 2021-07-30 | 2022-11-08 | 长江生态环保集团有限公司 | Scouring exploration and excavation equipment |
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|---|---|---|---|---|
| TWM240372U (en) * | 2003-03-06 | 2004-08-11 | Chih-Yu Li | A double cylinder shock absorber |
| KR20090063659A (en) * | 2007-12-14 | 2009-06-18 | 강대식 | Hydraulic breaker with sound-absorbing mechanism |
| CN201695429U (en) * | 2010-04-19 | 2011-01-05 | 合肥滨海工程机械有限公司 | Novel hydraulic-nitrogen joint action breaking hammer |
| CN201801896U (en) * | 2010-05-26 | 2011-04-20 | 上海金泰工程机械有限公司 | Cushioning device for diaphragm wall grab |
| CN203741897U (en) * | 2014-03-19 | 2014-07-30 | 樊硕 | Auxiliary power energy saving device of excavator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202324043U (en) * | 2011-10-09 | 2012-07-11 | 江苏力博士机械股份有限公司 | Auxiliary device for increasing hitting power of hydraulic breaking hammer |
| CN103806482B (en) * | 2014-03-19 | 2015-02-18 | 樊硕 | Auxiliary power energy-saving device of excavator |
-
2014
- 2014-03-19 CN CN201410102328.4A patent/CN103806482B/en not_active Expired - Fee Related
-
2015
- 2015-01-26 WO PCT/CN2015/071542 patent/WO2015139530A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM240372U (en) * | 2003-03-06 | 2004-08-11 | Chih-Yu Li | A double cylinder shock absorber |
| KR20090063659A (en) * | 2007-12-14 | 2009-06-18 | 강대식 | Hydraulic breaker with sound-absorbing mechanism |
| CN201695429U (en) * | 2010-04-19 | 2011-01-05 | 合肥滨海工程机械有限公司 | Novel hydraulic-nitrogen joint action breaking hammer |
| CN201801896U (en) * | 2010-05-26 | 2011-04-20 | 上海金泰工程机械有限公司 | Cushioning device for diaphragm wall grab |
| CN203741897U (en) * | 2014-03-19 | 2014-07-30 | 樊硕 | Auxiliary power energy saving device of excavator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103806482A (en) | 2014-05-21 |
| WO2015139530A1 (en) | 2015-09-24 |
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