CN107178530A - Garbage compression box power unit - Google Patents
Garbage compression box power unit Download PDFInfo
- Publication number
- CN107178530A CN107178530A CN201710288187.3A CN201710288187A CN107178530A CN 107178530 A CN107178530 A CN 107178530A CN 201710288187 A CN201710288187 A CN 201710288187A CN 107178530 A CN107178530 A CN 107178530A
- Authority
- CN
- China
- Prior art keywords
- oil pump
- compression box
- garbage compression
- valve
- push pedal
- 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.)
- Pending
Links
Classifications
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F1/00—Refuse receptacles; Accessories therefor
- B65F1/14—Other constructional features; Accessories
- B65F1/1405—Compressing means incorporated in, or specially adapted for, refuse receptacles
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F2210/00—Equipment of refuse receptacles
- B65F2210/162—Pressing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F2210/00—Equipment of refuse receptacles
- B65F2210/168—Sensing means
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
Abstract
The invention discloses a kind of garbage compression box power unit, including fuel tank, oil pump, push pedal oil cylinder, dump ram, the fuel tank is connected with the oil pump, the output end of the oil pump is divided into two-way, wherein it is connected all the way by two-position four way change valve, two-position four-way guide valve with the push pedal oil cylinder, another road is connected by three-position four-way valve with the dump ram.Garbage compression box power unit integration degree, the automaticity that the present invention is provided are significantly improved, realize the high pressure of garbage compression box power unit, high speed, high-power, high efficiency, low noise, low energy consumption, long-life, and it can be alarmed when buying securities with all one's capital state, and report present position.
Description
Technical field
The present invention relates to a kind of garbage compression box power unit.
Background technology
Mobile compression dustbin, is a kind of rubbish for integrating the temporarily storage of automatic garbage-collecting, compression and rubbish
Collecting box.It is made up of casing assembly and control system two large divisions, and mobile compression dustbin is controlled by control system
Packer carries out the compression of rubbish.Transported, used cooperatively in garbage disposal plant with torque arm car by matching torque arm car, realized
With back door noresidue rubbish in rubbish self-unloading, it is ensured that refuse-unloading is smooth and ensures after dumping, casing.Because car can divide with case
From exclusive use, a car can match somebody with somebody many casees, and the utilization rate of haulage vehicle is improved to greatest extent, reduce the configuration amount of vehicle, improve
Conevying efficiency, reduces operating cost.
Hydraulic technique being used garbage compression box power unit, existing garbage compression box hydraulic power unit power consumption is big more,
Efficiency is low, needs further development.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art there is provided a kind of garbage compression box power unit, in order to reach
The above-mentioned purpose present invention is adopted the following technical scheme that：
A kind of garbage compression box power unit, including fuel tank, oil pump, push pedal oil cylinder, dump ram, the fuel tank with it is described
Oil pump is connected, and the output end of the oil pump is divided into two-way, wherein all the way by two-position four way change valve, two-position four-way guide valve with
The push pedal oil cylinder connection, another road is connected by three-position four-way valve with the dump ram；The two-position four way change valve is set
There is a positive position for the output end of the oil pump to be connected with the rod chamber of the push pedal oil cylinder, and for by the oil pump
The reverse position that is connected with the rodless cavity of the push pedal oil cylinder of output end；The two-position four-way guide valve, which is provided with, to be used for the oil
Conducting that the output end of pump is connected with the rod chamber of push pedal oil cylinder position, and for by the rod chamber of the push pedal oil cylinder with
The cut-off position of the rodless cavity connection of the push pedal oil cylinder；The three-position four-way valve, which is provided with, to be used for the output end of the oil pump and institute
The middle position of dump ram cut-off, the left position for the output end of the oil pump to be connected with the dump ram rod chamber are stated, with
And the right position for the output end of the oil pump to be connected with the dump ram rodless cavity.
It is preferred that, the fuel tank is provided with oil absorption filter, temperature liquid level meter, air cleaner, liquid-level switch, temperature pick-up
Device and/or return filter.
It is preferred that, the output end of the oil pump is provided with pressure gauge, oil cooler and/or blocking warner.
It is preferred that, the output end of the oil pump is connected with high-pressure overflow valve, low pressure relief valve by reversal valve.
It is preferred that, the rod chamber of the rodless cavity of the dump ram and/or the dump ram is provided with one-way throttle valve.
It is preferred that, the dump ram is provided with hydraulic lock.
It is preferred that, the push pedal oil cylinder is provided with the displacement transducer for being used for detecting piston position or push rod position；
The output end of the oil pump is provided with the pressure sensor for being used for detecting the oil pump maximum output pressure；
The two-position four way change valve, which is provided with, to be used to detect the current sensor whether its magnetic valve is powered；
Institute's displacement sensors, pressure sensor and the current sensor are electrically connected with the controller respectively, by the control
Device processed judges whether garbage compression box buys securities with all one's capital.
It is preferred that, the controller is electrically connected with alarm, to be entered by the alarm to the garbage compression box bought securities with all one's capital
Row alarm.
It is preferred that, the controller is electrically connected to GPS positioning device, to report what is bought securities with all one's capital by the GPS positioning device
Garbage compression box position.
Garbage compression box power unit integration degree, the automaticity that the present invention is provided are significantly improved, and realize rubbish
The high pressure of rubbish compression box power unit, high speed, high-power, high efficiency, low noise, low energy consumption, long-life, and can buy securities with all one's capital
Alarmed when state, and report present position.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Inappropriate limitation of the present invention is constituted, in the accompanying drawings：
Fig. 1 is hydraulic schematic diagram of the embodiment of the present invention.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, herein illustrative examples of the invention
And explanation is used for explaining the present invention, but it is not as a limitation of the invention.
Embodiment：
As shown in figure 1, a kind of garbage compression box power unit, including fuel tank V0, oil pump V6, push pedal oil cylinder, dump ram,
The fuel tank V0 is used as the storage fluid of hydraulic system, is met cylinder action, is internally provided with oil absorption filter V1, temperature liquid
Position meter V3, air cleaner V4, liquid-level switch K1, temperature transmitter K2 and/or return filter V2, air cleaner V4 make oil
Case V0 and air communication, and provided with filter screen, prevent foul from entering fuel tank V0, temperature liquid level meter V3 is used for temperature observations, detection oil
Liquid level is put, and when liquid level is less than test position, liquid-level switch K1 is opened, and sends alarm signal, points out fluid is too low to need to refuel,
At this time controlled motor is stopped, and temperature transmitter K2 is used for the temperature for detecting fuel tank V0 fluid, and sets high temperature alarm letter
Number, when high oil temperature motor is stopped, and alarm signal is sent, point out high oil temperature；Its output end provided with pressure gauge V16,
Oil cooler V18 and/or blocking warner K4, the fuel tank V0 are connected with the oil pump V6, and oil pump V6 is driven by motor V5, to be
System provides pressure and flow, and the output end of the oil pump V6 is divided into two-way, wherein passing through two-position four way change valve V13, two all the way
Position four-way guide valve V12 is connected with the push pedal oil cylinder, and another road is connected by three-position four-way valve V10 with the dump ram；
The two-position four way change valve V13 uses YUKENDSG-01-2B2-D24-N1-50, and it, which is provided with, is used for the defeated of the oil pump V6
Go out the positive position that is connected with the rod chamber of the push pedal oil cylinder of end, and for by the output end of the oil pump V6 and the push pedal
It is described in the case where two-position four way change valve V13 electromagnet DT2 is without electricity condition in the reverse position of the rodless cavity connection of oil cylinder, figure
Oil pump V6 output end is connected with the rod chamber of the push pedal oil cylinder, when electromagnet DT2 is powered, the output end of the oil pump V6
It is connected with the rodless cavity of the push pedal oil cylinder；The two-position four-way guide valve V12 uses YUKEN DSG-01-2B8-D24-N1-
50, it is provided with the conducting position for being used to the output end of the oil pump V6 being connected with the rod chamber of the push pedal oil cylinder, and is used for
The cut-off position that the rod chamber of the push pedal oil cylinder is connected with the rodless cavity of the push pedal oil cylinder, Fig. 1, when the two-position four-way is led
When not charged to valve V12 electromagnet DT3, the output end of the oil pump V6 is connected conducting with the rod chamber of the push pedal oil cylinder,
When electromagnet DT3 is powered, rod chamber and the rodless cavity of the push pedal oil cylinder are turned on；The three-position four-way valve V10 uses YUKEN
DSG-01-3C4-D24-N1-50, its be provided be used to ending the output end of the oil pump V6 and the dump ram middle position,
For the left position for being connected the output end of the oil pump V6 with the dump ram rod chamber, and for by the oil pump V6's
In the right position that output end is connected with the dump ram rodless cavity, figure, when the three-position four-way valve V10 left electromagnet DT4 with
Right electromagnet DT5 all no power when, valve element is located at middle position, and the output end of the oil pump V6 do not connect with the dump ram, when
When the left electromagnet DT4 of the three-position four-way valve V10 is powered, valve element is located at left position, and the output end of the oil pump V6 is turned over described
Struggle against cylinder rod chamber connection, and valve element is located at right position, and when the right electromagnet DT4 of the three-position four-way valve V10 is powered, valve element is located at
Right position, the output end of the oil pump V6 is connected with the dump ram rodless cavity.
As the improvement of above-described embodiment scheme, in the present embodiment, the output end of the oil pump V6 is connected by reversal valve V8
High-pressure overflow valve, low pressure relief valve are connected to, reversal valve V8 valve element is controlled by electromagnet DT1.
As the improvement of above-described embodiment scheme, in the present embodiment, the rodless cavity of the dump ram and/or the tipping bucket
The rod chamber of oil cylinder is provided with one-way throttle valve V14.
As the improvement of above-described embodiment scheme, in the present embodiment, the dump ram is provided with hydraulic lock V15.
Workflow explanation：
Batch turning process：Rubbish is poured into after hopper, motor V5 driving oil pump V6 actions, and control overturning oil cylinder stretches out, by hopper
Middle rubbish is poured into dustbin, overturning oil cylinder in place after, three-position four-way valve V10 commutations, overturning oil cylinder is retracted, and hopper retracts ground
Face.
Compression process：After rubbish pours into dustbin, two-position four-way guide valve V12 and two-position four way change valve V13 are simultaneously
Open, cylinder rod chamber and rodless cavity are turned on to form differential circuit, and oil cylinder is quickly released.The quick pusher of push pedal oil cylinder, push pedal oil
Cylinder is when head, and two-position four-way guide valve V12 disconnects, and two-position four way change valve V13 is opened, at this time push pedal oil cylinder pusher at a slow speed
And compressed garbage.After push pedal oil cylinder reaches bottom, two-position four-way guide valve V12 is disconnected, and push pedal oil cylinder is retracted.The compressed action
Circulate 3 times back and forth, complete compression process.
Compress after rubbish, motor V5 is out of service, be prepared to enter into next garbage-compressing process.
In addition, the existing alarm technique principle of buying securities with all one's capital that has on the market is total required back and forth using push pedal oil cylinder normal work one
Time change calculates whether buy securities with all one's capital, and the total time value that normal work push pedal oil cylinder one is moved back and forth is set when initial,
Because after rubbish is more, the total working stroke of push pedal oil cylinder will shorten, and the time back and forth of push pedal oil cylinder will also become
Short, if be shorter than the working time initially set, system, which is just given tacit consent to, buys securities with all one's capital, machine down.But defect is it is obvious that different
Compression time required for rubbish is different, and this will result in the false alarm of system.
In view of the above-mentioned problems, in the embodiment of the present invention, the push pedal oil cylinder, which is provided with, to be used to detect piston position or push rod position
The displacement transducer put, but only position e insufficient to feedback rubbish pressure it is full because push pedal oil cylinder is compacted rubbish repeatedly
During, always can be repeatedly by our default positions of buying securities with all one's capital；Therefore the output end of the oil pump, which is provided with, is used to detect described
The pressure sensor of oil pump maximum output pressure, only pressure just show to be pressed onto bottom really when maximum；And described two
Four-way reversing valve, which is provided with, to be used to detect the current sensor whether its magnetic valve is powered, because dump ram action can also trigger pressure
Force snesor maximum pressure value, at this time also can easily trigger false alarm, therefore, and push pedal oil cylinder shifts default position of buying securities with all one's capital onto,
And now active force is maximum, and push pedal oil cylinder promotes electric, prove that garbage compression box is the state of buying securities with all one's capital enough.
Institute's displacement sensors, pressure sensor and the current sensor are electrically connected with the controller respectively, by the control
Device processed judges whether garbage compression box buys securities with all one's capital.
It is preferred that, the controller is electrically connected with alarm, to be entered by the alarm to the garbage compression box bought securities with all one's capital
Row alarm.
It is preferred that, the controller is electrically connected to GPS positioning device, to report what is bought securities with all one's capital by the GPS positioning device
Garbage compression box position.
The technical scheme provided above the embodiment of the present invention is described in detail, specific case used herein
Principle and embodiment to the embodiment of the present invention are set forth, and the explanation of above example is only applicable to help and understands this
The principle of inventive embodiments；Simultaneously for those of ordinary skill in the art, according to the embodiment of the present invention, in specific embodiment party
It will change in formula and application, in summary, this specification content should not be construed as limiting the invention.
Claims (9)
1. a kind of garbage compression box power unit, it is characterised in that：
Including fuel tank, oil pump, push pedal oil cylinder, dump ram, the fuel tank is connected with the oil pump, the output end point of the oil pump
For two-way, wherein be connected all the way by two-position four way change valve (V13), two-position four-way guide valve (V12) with the push pedal oil cylinder,
Another road is connected by three-position four-way valve (V10) with the dump ram；
The two-position four way change valve (V13), which is provided with, to be used to connect the rod chamber of the output end of the oil pump and the push pedal oil cylinder
The positive position connect, and the reverse position for the output end of the oil pump to be connected with the rodless cavity of the push pedal oil cylinder；
The two-position four-way guide valve (V12), which is provided with, to be used to connect the rod chamber of the output end of the oil pump and the push pedal oil cylinder
The conducting position connect, and the cut-off position for the rod chamber of the push pedal oil cylinder to be connected with the rodless cavity of the push pedal oil cylinder,
For realizing the differential quick release of push pedal oil cylinder；
The three-position four-way valve (V10) is provided with middle position, the use for being used to end the output end of the oil pump and the dump ram
In the left position for being connected the output end of the oil pump with the dump ram rod chamber, and for by the output end of the oil pump
The right position being connected with the dump ram rodless cavity.
2. garbage compression box power unit as claimed in claim 1, it is characterised in that：
The fuel tank is provided with oil absorption filter, temperature liquid level meter, air cleaner, liquid-level switch, temperature transmitter and/or oil return
Filter.
3. garbage compression box power unit as claimed in claim 1, it is characterised in that：
The output end of the oil pump is provided with pressure gauge, oil cooler and/or blocking warner.
4. garbage compression box power unit as claimed in claim 1, it is characterised in that：
The output end of the oil pump is connected with high-pressure overflow valve, low pressure relief valve by reversal valve.
5. garbage compression box power unit as claimed in claim 1, it is characterised in that：
The rod chamber of the rodless cavity of the dump ram and/or the dump ram is provided with one-way throttle valve.
6. garbage compression box power unit as claimed in claim 1, it is characterised in that：
The dump ram is provided with hydraulic lock.
7. garbage compression box power unit as claimed in claim 1, it is characterised in that：
The push pedal oil cylinder is provided with the displacement transducer for being used for detecting piston position or push rod position；
The output end of the oil pump is provided with the pressure sensor for being used for detecting the oil pump maximum output pressure；
The two-position four way change valve, which is provided with, to be used to detect the current sensor whether its magnetic valve is powered；
Institute's displacement sensors, pressure sensor and the current sensor are electrically connected with the controller respectively, by the controller
Judge whether garbage compression box buys securities with all one's capital.
8. garbage compression box power unit as claimed in claim 7, it is characterised in that：
The controller is electrically connected with alarm, to be alarmed by the alarm the garbage compression box bought securities with all one's capital.
9. garbage compression box power unit as claimed in claim 7, it is characterised in that：
The controller is electrically connected to GPS positioning device, to report the garbage compression box institute bought securities with all one's capital by the GPS positioning device
In position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710288187.3A CN107178530A (en) | 2017-04-27 | 2017-04-27 | Garbage compression box power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710288187.3A CN107178530A (en) | 2017-04-27 | 2017-04-27 | Garbage compression box power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107178530A true CN107178530A (en) | 2017-09-19 |
Family
ID=59831628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710288187.3A Pending CN107178530A (en) | 2017-04-27 | 2017-04-27 | Garbage compression box power unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107178530A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605830A (en) * | 2017-11-03 | 2018-01-19 | 深圳市科斯腾液压设备有限公司 | Electro-hydraulic servo garbage compression box power unit |
| CN107867007A (en) * | 2016-09-28 | 2018-04-03 | 广西大学 | A kind of stepper motor driven automatic compressor structure |
| CN109441896A (en) * | 2018-11-21 | 2019-03-08 | 福建龙马环卫装备股份有限公司 | A kind of electrohydraulic system and method improving garbage truck degree |
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| CN205446226U (en) * | 2016-03-21 | 2016-08-10 | 张海 | Novel intelligence does not have low noise of impact electro -mechanical -hydraulic integral hydraulic system |
| CN205858810U (en) * | 2016-06-19 | 2017-01-04 | 广州嘉泰液压机电有限公司 | A kind of hydraulic system at disjunctor case compression power station |
| CN206830553U (en) * | 2017-04-27 | 2018-01-02 | 杭州爱力领富科技股份有限公司 | Garbage compression box power unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007046719A (en) * | 2005-08-10 | 2007-02-22 | Shin Meiwa Ind Co Ltd | Reciprocation control device for hydraulic cylinder and loading device of garbage collector using the same |
| CN101324244A (en) * | 2008-07-01 | 2008-12-17 | 南通市南方润滑液压设备有限公司 | Hydraulic system of back cavity proportionality velocity modulation garbage disposal apparatus |
| CN203335502U (en) * | 2013-07-08 | 2013-12-11 | 湖南鸿辉科技有限公司 | Hydraulic device of conjoined compression box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107867007A (en) * | 2016-09-28 | 2018-04-03 | 广西大学 | A kind of stepper motor driven automatic compressor structure |
| CN107605830A (en) * | 2017-11-03 | 2018-01-19 | 深圳市科斯腾液压设备有限公司 | Electro-hydraulic servo garbage compression box power unit |
| CN109441896A (en) * | 2018-11-21 | 2019-03-08 | 福建龙马环卫装备股份有限公司 | A kind of electrohydraulic system and method improving garbage truck degree |
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Application publication date: 20170919 |
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| RJ01 | Rejection of invention patent application after publication |