CN206720085U - A kind of rear-loading compression type garbage truck constant pressure contracting draught control system - Google Patents
A kind of rear-loading compression type garbage truck constant pressure contracting draught control system Download PDFInfo
- Publication number
- CN206720085U CN206720085U CN201720138665.8U CN201720138665U CN206720085U CN 206720085 U CN206720085 U CN 206720085U CN 201720138665 U CN201720138665 U CN 201720138665U CN 206720085 U CN206720085 U CN 206720085U
- Authority
- CN
- China
- Prior art keywords
- valve
- push pedal
- oil cylinder
- stage oil
- pressure
- 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
- Body Structure For Vehicles (AREA)
Abstract
Rear-loading compression type garbage truck constant pressure contracting draught control system,Including hydraulic oil container,Hydraulic pump,Overflow valve,Multichannel valve group,Skateboard tank,Push pedal multi-stage oil cylinder,Check valve,Described hydraulic oil container connects multichannel valve group by hydraulic pump,Banked direction control valves group connects skateboard tank respectively,Push pedal multi-stage oil cylinder,System also includes counterbalance valve,Controller,First pressure sensor,Second pressure sensor,Displacement transducer and proximity switch,Counterbalance valve is connected between the big chamber of push pedal multi-stage oil cylinder afterbody and fuel tank,Push pedal multi-stage oil cylinder is provided with displacement transducer,And displacement transducer and its slipper are separately mounted on the afterbody cylinder barrel and first order piston rod of push pedal multi-stage oil cylinder,First pressure sensor is arranged on the LOADED CAVITY of skateboard tank,Second pressure sensor is arranged on the big chamber of afterbody of push pedal multi-stage oil cylinder,The inductive head of proximity switch is arranged on skateboard tank stroke most piston rod head position in short-term,Displacement transducer,The signal output part of two pressure sensors and proximity switch is respectively connected to the signal acquisition terminal of controller,The control port of the signal output part connection counterbalance valve of controller.
Description
Technical field
The utility model belongs to hydraulic system technical field, and in particular to a kind of permanent compression stress of rear-loading compression type garbage truck
Regulating system.
Background technology
The special sanitation vehicle that rear-loading compression type garbage truck is a kind of refuse collection with transhipment, have rubbish freight volume big and
The advantages of can avoiding spilling on the way and causing secondary pollution.Its structure mainly includes：Two class automobile chassises, sealing dustbin, push away
Trigger structure, sizer, scraper plate sled mechanism, the hydraulic pressure and electrical system of tilting device and correlation.Specific workflow is：Incline
Focusing device digs dustbin, and rubbish enters bucket；Turned on scraper plate；Slide plate declines in place with scraper plate；Board reversal is scraped to dig rubbish；
Slide plate rises with scraper plate, and rubbish is pressed into case.Until dustbin is filled, rubbish is transported to dumping ground, filler for cycle operation
Device is integrally flipped up in the presence of elevating ram, and push pedal oil cylinder, which stretches out, promotes push pedal to be moved rearwards, and FCL rubbish is released
Discharging outside car.
The compression ratio of compression type garbage truck is its important performance indications, depends primarily on the compressed capability of compression mechanism,
Compression mechanism is all by the way of bi-directional compression at present.Before loading rubbish, push pedal oil cylinder is fully extended, and push pedal is moved into carriage body
Rearmost part, exported in push pedal oil cylinder and a counterbalance valve is set, during slide plate rises garbage-compressing, counterbalance valve overflow, therefore
Rubbish is become closely knit by the effect of bi-directional compression, simultaneously as the compression stress that slide plate provides is more than the back pressure of push pedal oil cylinder
Compression stress, therefore rubbish, to the anterior movement in compartment, is loaded, such rubbish can is layer by layer while bi-directional compression in compression
Compacting, and avoid the phenomenon of " loose at first but afterwards tight ".But the problem of this structure is primarily present following several respects：
(1) compression ratio is not high enough；Because general 45 degree of skateboard tank is tilting, so the power output of skateboard tank only has its water
Divide power equally and be used for garbage-compressing, and with railway carriage or compartment quantity of refuse increase, the frictional force of rubbish and carriage body becomes big, easily cause rubbish
When rubbish is filled soon, slide plate pushes away motionless rubbish and can not complete loading task, thus counterbalance valve pressure can not set it is too high.
(2) rubbish unloading is difficult；Because the setting of counterbalance valve pressure can not be too high, therefore when refuse-unloading is stretched out in push pedal,
Counterbalance valve overflow and prevent push pedal from completing extending action.For problem (2), patent CN201746005U proposes a kind of positive back of the body
Separately adjustable hydraulic circuit is pressed, but problem (1) still has.
For the less shortcoming of problem (1) compression ratio, a kind of back pressure valve arrangement as shown in Figure 1 is suggested, and in market
On be commonly used.Counterbalance valve is made up of logical valve A1, reversal valve A2 and overflow valve A3, and skateboard tank loading cavity pressure is used to control
Reversal valve A2 commutates.During work, at the beginning, logical valve A1 and reversal valve A2 are closed, and as slide plate is lifted, rubbish is compressed, when
The valve is opened when slide plate pressure reaches reversal valve A2 pressure Ps, while logical valve A1 is also opened, in the mistake that slide plate continues to rise
Cheng Zhong, the setting less overflow valve A3 of pressure are opened, and before can so ensureing that valve is opened, rubbish is sufficiently compressed, and valve is opened
The process loaded in compression is completed afterwards.But there is problems with the program：
(1) when quantity of refuse is less, and when the garbage-compressing that loads is smaller, easily occur valve A1, A2 frequently switch on and
Influence the phenomenon that slide plate rises.Main cause is overflow valve A3 also overflows after reversal valve A2 and logical valve A1 is opened, but due to it
It is smaller to set pressure, so that the pressure of slide plate cylinder LOADED CAVITY is less than Ps again, causes reversal valve A2 and logical valve A1 to close, that
Slide plate cavity pressure rises and is more than Ps again so that valve A1, A2 are reopened, switch so again and again, are influenceed to load and are moved
The completion of work, it can also damage seal.
(2) when quantity of refuse is more in compartment, during slide plate rises the new loading rubbish of compression each time, rubbish in compartment
Compressed power is uneven, and causes loose at first but afterwards tight phenomenon, because the frictional force of the rubbish in compartment and carriage body inwall counteracts
The compression stress that skateboard tank applies, the anterior compressed power of rubbish in compartment is smaller.
(3) overflow valve A3 open and rubbish to compartment it is anterior mobile during, the compression stress that anterior rubbish is received is overflow
Pressure and Multi-stage cylinder currently retract section big cavity area product, and the area of Multi-stage cylinder retraction section is gradually to increase, therefore anterior
The compression stress that rubbish is received is gradually to increase, and this also results in loose at first but afterwards tight phenomenon.
Utility model content
To solve the above problems, the utility model provides a kind of constant pressure contracting draught control system, above-mentioned document can be both avoided
The slide plate of middle appearance rises the problem of shake, and and can improves the homogeneity of garbage-compressing ratio and compression.
Technical scheme is used by the utility model solves its technical problem：
Rear-loading compression type garbage truck constant pressure contracting draught control system, including hydraulic oil container, hydraulic pump, overflow valve, multichannel valve group,
Skateboard tank, push pedal multi-stage oil cylinder, check valve, described hydraulic oil container connect multichannel valve group, banked direction control valves component by hydraulic pump
Not Lian Jie skateboard tank, push pedal multi-stage oil cylinder, system also include counterbalance valve, controller, first pressure sensor, second pressure pass
Sensor, displacement transducer and proximity switch, counterbalance valve are connected between the big chamber of push pedal multi-stage oil cylinder afterbody and fuel tank, and push pedal is more
Level oil cylinder is provided with displacement transducer, and displacement transducer and its slipper are separately mounted to last of push pedal multi-stage oil cylinder
On level cylinder barrel and first order piston rod, first pressure sensor is arranged on the LOADED CAVITY of skateboard tank, and second pressure sensor is set
Put the big chamber of afterbody in push pedal multi-stage oil cylinder, the inductive head of proximity switch is arranged on skateboard tank stroke most piston rod in short-term
Head position, the signal output part of displacement transducer, two pressure sensors and proximity switch are respectively connected to the signal of controller
Collection terminal, the control port of the signal output part connection counterbalance valve of controller.
Counterbalance valve employed in rear-loading compression type garbage truck constant pressure contracting draught control system is electricity liquid ratio relief valve.
Controller is provided with control program in rear-loading compression type garbage truck constant pressure contracting draught control system, according to displacement transducer and
The signal value of pressure sensor controls counterbalance valve so as to set pressure,
The control method of above-mentioned rear-loading compression type garbage truck constant pressure contracting draught control system, specifically includes following steps：
Step S100, counterbalance valve pressure is set as maximum, corresponding electric signal is 20mA, and performs step S101；
Step S101, test first pressure sensor pressure values P2, and perform step S102；
Step S102, judge tested pressure value P2Whether P is more thanmax, if greater than Pmax, then step 103 is performed, it is no
Then return to step S101；
Step S103, triggering timing device start timing, and perform step S104；
Step S104, judges whether delay time reaches t0, and t0 is set to 3 seconds, if delay time arrives, performs step
S105, otherwise return to step S104, continues to judge；
Step S105, displacement transducer signal x is detected, and follow-up step is performed according to x scope；
Step S106, x meet 0<x<X1, x1 are Multi-stage cylinder first order stroke, then perform step S110；
Step S107, x meet x1<x<X2, x2 are second level stroke before Multi-stage cylinder, then perform step S111；
Step S108, x meet x2<x<X3, x3 are three-level stroke before Multi-stage cylinder, then perform step S112；
Step S109, x meet x3<x<X4, x4 are level Four stroke before Multi-stage cylinder, then perform step S113；
Step S110, calculate counterbalance valve setting pressure Ps1=F/A1, F is to set compression stress, A1For first order rodless cavity face
Product, and perform step S114；
Step S111, calculate counterbalance valve setting pressure Ps2=F/A2, F is to set compression stress, A2For second level rodless cavity face
Product, and perform step S114；
Step S112, calculate counterbalance valve setting pressure Ps3=F/A3, F is to set compression stress, A3For third level rodless cavity face
Product, and perform step S114；
Step S113, calculate counterbalance valve setting pressure Ps4=F/A4, F is to set compression stress, A4For fourth stage rodless cavity face
Product, and perform step S114；
Step S114, export back pressure valve control signal；
Step S115, judge whether skateboard tank stroke proximity switch signal is 1, if 1, then return to step S100,
Reset back pressure valve signal 20mA；Otherwise, step S115 is performed always.
The beneficial effects of the utility model：The garbage-compressing loading process middle slide plate oil occurred in above-mentioned document can be avoided
The problem of cylinder is shaken, adoption rate overflow valve freely adjusts counterbalance valve pressure according to operating mode, both can guarantee that dress as counterbalance valve
Smoothly completing for operation is carried, and can improves the compression ratio and homogeneity of rubbish.
Brief description of the drawings
Fig. 1 is the standby hydraulic system principle figure of installing on traditional rear-loading compression type garbage truck；
Fig. 2 is the utility model embodiment systematic schematic diagram；
Fig. 3 is electricity liquid ratio relief valve control signal and the graph of a relation for setting pressure；
Fig. 4 is displacement and the graph of a relation of output electric signal of displacement transducer；
Fig. 5 is the utility model embodiment control method flow chart.
In Fig. 2：1- fuel tanks, 2- hydraulic pumps, 3- proportional pressure control valves, 4- overflow valves, 5- multichannels valve group, 6- skateboard tanks, 7-
Check valve, 8- first pressures sensor, 9- second pressures sensor, 10- push pedals multi-stage oil cylinder, 11- displacement transducers, 12- positions
Displacement sensor slipper, 13- controllers.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Fig. 2 a kind of rear-loading compression type garbage truck constant pressure contracting draught control system of the present embodiment description, including hydraulic pressure
Fuel tank 1, hydraulic pump 2, overflow valve 4, multichannel valve group 5, skateboard tank 6, push pedal multi-stage oil cylinder 10, check valve 7, described hydraulic oil
Case 1 connects multichannel valve group 5 by hydraulic pump 2, and multichannel valve group 5 connects skateboard tank 6, push pedal multi-stage oil cylinder 10 respectively, and system is also
Including counterbalance valve 3, controller 13, first pressure sensor 8, second pressure sensor 9, displacement transducer 11 and proximity switch
14, counterbalance valve 3 is connected between the big chamber of the afterbody of push pedal multi-stage oil cylinder 10 and fuel tank, and push pedal multi-stage oil cylinder 10 passes provided with displacement
Sensor 11, and displacement transducer 11 and its slipper 12 are separately mounted to the afterbody cylinder barrel and first of push pedal multi-stage oil cylinder
On level piston rod, first pressure sensor 8 set the LOADED CAVITY of skateboard tank 6, second pressure sensor 9 to be arranged on push pedal more
The big chamber of afterbody of level oil cylinder 10, the inductive head of proximity switch 14 are arranged on the stroke of skateboard tank 6 most piston rod head in short-term
The signal output part of position, 11, two pressure sensors of displacement transducer and proximity switch 14 is respectively connected to the letter of controller 13
Number collection terminal, the control port of the signal output part connection counterbalance valve 3 of controller 13.
Counterbalance valve 3 described in the utility model uses electricity liquid ratio relief valve.Proportional pressure control valve be by electric signal come
A kind of proportioning valve of oil pressure relief is set, and into approximately linear proportionate relationship between oil pressure relief and electric signal, such as Fig. 3 institutes
Show.
Control program is provided with controller 13 described in the utility model, according to displacement transducer 11 and pressure sensor
8 signal value come control counterbalance valve 3 set pressure.Displacement transducer is used for testing the stretching displacement of push pedal multi-stage oil cylinder, and it is surveyed
It is linear relationship between the displacement of examination and the electric signal of output, as shown in Figure 4.
Control program is mainly according to the running status of vehicle come the oil pressure relief of setting ratio overflow valve.
Its control process is as follows：
Step S100, the pressure of counterbalance valve 3 is set as maximum, corresponding electric signal is 20mA, and performs step S101；
Step S101, the pressure value P of test first pressure sensor 82, and perform step S102；
Step S102, judge tested pressure value P2Whether P is more thanmax, if greater than Pmax, then step 103 is performed, it is no
Then return to step S101；
Step S103, triggering timing device start timing, and perform step S104；
Step S104, judges whether delay time reaches t0, and t0 is set to 3 seconds, if delay time arrives, performs step
S105, otherwise return to step S104, continues to judge；
Step S105, the signal x of displacement transducer 11 is detected, and follow-up step is performed according to x scope；
Step S106, x meet 0<x<X1, x1 are Multi-stage cylinder first order stroke, then perform step S110；
Step S107, x meet x1<x<X2, x2 are second level stroke before Multi-stage cylinder, then perform step S111；
Step S108, x meet x2<x<X3, x3 are three-level stroke before Multi-stage cylinder, then perform step S112；
Step S109, x meet x3<x<X4, x4 are level Four stroke before Multi-stage cylinder, then perform step S113；
Step S110, calculate counterbalance valve 3 and set pressure Ps1=F/A1, F is to set compression stress, A1For first order rodless cavity face
Product, and perform step S114；
Step S111, calculate counterbalance valve 3 and set pressure Ps2=F/A2, F is to set compression stress, A2For second level rodless cavity face
Product, and perform step S114；
Step S112, calculate counterbalance valve 3 and set pressure Ps3=F/A3, F is to set compression stress, A3For third level rodless cavity face
Product, and perform step S114；
Step S113, calculate counterbalance valve 3 and set pressure Ps4=F/A4, F is to set compression stress, A4For fourth stage rodless cavity face
Product, and perform step S114；
Step S114, export the control signal of counterbalance valve 3；
Step S115, judge whether the signal of 6 stroke proximity switch of skateboard tank 14 is 1, if 1, then return to step
S100, reset back pressure valve signal 20mA；Otherwise, step S115 is performed always.
Its working condition is as follows：
Chassis under transport condition, for anti-thrust plate in vehicle deceleration forward slip, the pressure of counterbalance valve 3 is set as most
Big value, for example its electric signal is set as 20mA；
Rise in slide plate, under rubbish extruding operating mode, system has following control function, as slide plate loading cavity pressure P2Do not arrive
Up to setting value PmaxDuring=16Mpa, such as, P2＜ 16Mpa, then counterbalance valve 3 set pressure be still set as maximum, its telecommunications
Number be 20mA, if P ＞ 16Mpa timing start, be delayed 3 seconds, time period push pedal is motionless, the LOADED CAVITY overflow valve 4 of skateboard tank 6
Overflow, to ensure maximum loading force compressed garbage, and due in whole compartment rubbish produced under the effect of slide plate extruding force
Deformation, therefore wriggled toward compartment is anterior.This wriggling process of rubbish needs the regular hour, and is rubbed by compartment inwall
Wipe power and offset the extruding force of part slide plate, so as to cause the extruding force that anterior rubbish is subject to smaller, therefore extrude and protect
Hold a period of time until in compartment rubbish reach a kind of compression poised state, can so ensure the compression stress that rubbish is received it is constant,
Uniformly.After delay terminates, counterbalance valve setting pressure reduces, so that whole railway carriage or compartment rubbish is completed to load toward the movement of compartment front portion
Journey, in this course, because compressed power reduces, therefore, extruded rubbish can produce bounce-back, to constrain its rebound amount,
It must ensure that compression stress is consistent, but because the big cavity area of push pedal Multi-stage cylinder is influenceed by stroke, therefore, the setting pressure of counterbalance valve
ForWherein：PsiBe Multi-stage cylinder every one-level lower back pressure valve set pressure, F be setting compression stress, AiIt is every for Multi-stage cylinder
The big cavity area of one-level；In place, when proximity switch output signal is 1, overflow valve 4 sets pressure as maximum to skateboard tank 6, its electricity
Signal is 20mA；
In refuse-unloading field, when push pedal multi-stage oil cylinder 10 stretches out discharging, because rubbish is larger by compartment inwall frictional force,
To ensure the normal output of thrust, counterbalance valve pressure is set to maximum, its electric signal is 20mA.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all within principle of the present utility model, institute
Any modification, equivalent substitution and improvements of work etc., should be included within the scope of protection of the utility model.
Claims (2)
1. a kind of rear-loading compression type garbage truck constant pressure contracting draught control system, including hydraulic oil container (1), hydraulic pump (2), overflow valve
(4), multichannel valve group (5), skateboard tank (6), push pedal multi-stage oil cylinder (10), check valve (7), described hydraulic oil container (1) pass through
Hydraulic pump (2) connection multichannel valve group (5), multichannel valve group (5) connects skateboard tank (6), push pedal multi-stage oil cylinder (10) respectively, and it is special
Sign is that system also includes counterbalance valve (3), controller (13), first pressure sensor (8), second pressure sensor (9), position
Displacement sensor (11) and proximity switch (14), counterbalance valve (3) be connected in the big chamber of push pedal multi-stage oil cylinder (10) afterbody and fuel tank it
Between, push pedal multi-stage oil cylinder (10) is provided with displacement transducer (11), and displacement transducer (11) and its slipper (12) are respectively
On the afterbody cylinder barrel and first order piston rod of push pedal multi-stage oil cylinder, first pressure sensor (8) sets slide plate oil
The LOADED CAVITY of cylinder (6), the big chamber of afterbody installed in push pedal multi-stage oil cylinder (10) of second pressure sensor (9), it is close to open
The inductive head for closing (14) is arranged on skateboard tank (6) stroke most piston rod head position in short-term, displacement transducer (11), two pressures
The signal output part of force snesor and proximity switch (14) is respectively connected to the signal acquisition terminal of controller (13), controller (13)
The control port of signal output part connection counterbalance valve (3).
A kind of 2. rear-loading compression type garbage truck constant pressure contracting draught control system according to claim 1, it is characterised in that back pressure
Valve (3) is electricity liquid ratio relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138665.8U CN206720085U (en) | 2017-02-16 | 2017-02-16 | A kind of rear-loading compression type garbage truck constant pressure contracting draught control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138665.8U CN206720085U (en) | 2017-02-16 | 2017-02-16 | A kind of rear-loading compression type garbage truck constant pressure contracting draught control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206720085U true CN206720085U (en) | 2017-12-08 |
Family
ID=60499500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720138665.8U Active CN206720085U (en) | 2017-02-16 | 2017-02-16 | A kind of rear-loading compression type garbage truck constant pressure contracting draught control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206720085U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106829280A (en) * | 2017-02-16 | 2017-06-13 | 数源科技股份有限公司 | A kind of rear-loading compression type garbage truck constant pressure contracting draught control system and control method |
| CN109441897A (en) * | 2018-11-02 | 2019-03-08 | 上海强田液压股份有限公司 | A kind of dedicated multi-way valve of rear-loading compression type garbage truck |
| CN110435209A (en) * | 2019-07-22 | 2019-11-12 | 深圳东风汽车有限公司 | Connected compression box push top dynamic intelligent control system and method |
-
2017
- 2017-02-16 CN CN201720138665.8U patent/CN206720085U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106829280A (en) * | 2017-02-16 | 2017-06-13 | 数源科技股份有限公司 | A kind of rear-loading compression type garbage truck constant pressure contracting draught control system and control method |
| CN109441897A (en) * | 2018-11-02 | 2019-03-08 | 上海强田液压股份有限公司 | A kind of dedicated multi-way valve of rear-loading compression type garbage truck |
| CN110435209A (en) * | 2019-07-22 | 2019-11-12 | 深圳东风汽车有限公司 | Connected compression box push top dynamic intelligent control system and method |
| CN110435209B (en) * | 2019-07-22 | 2021-02-26 | 深圳东风汽车有限公司 | Dynamic intelligent control system and method for push head of connected compression box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106829280A (en) | A kind of rear-loading compression type garbage truck constant pressure contracting draught control system and control method | |
| CN107054954B (en) | Energy-saving constant-thrust compression system of compression type garbage truck loading equipment and control method | |
| CN206720085U (en) | A kind of rear-loading compression type garbage truck constant pressure contracting draught control system | |
| CN109058187B (en) | Unloading buffer hydraulic system | |
| CN205315374U (en) | Swing arm formula compression garbage truck hydraulic control system | |
| CN107791920A (en) | For operating the method and system of dumper | |
| CN106257991A (en) | There is the implement system of hydraulic starting auxiliary | |
| CN111846716B (en) | Control method of push shovel of kitchen garbage truck during garbage compression | |
| CN112253559A (en) | Pressure adjusting hydraulic circuit for compression type garbage truck, control method and compression type garbage truck | |
| CN206447081U (en) | Standby energy-saving permanent thrust compressibility is installed on a kind of compression type garbage truck | |
| CN113482990B (en) | Compression garbage truck and hydraulic system thereof | |
| CN207275467U (en) | A kind of Mobile garbage compression box auxiliary power switching device in winter | |
| CN102287421B (en) | Hydraulic oil tank testing system | |
| CN107503994A (en) | Energy-saving back pressure system and control method are filled on a kind of pure electric compression type garbage truck | |
| CN107178530A (en) | Garbage compression box power unit | |
| CN206830553U (en) | Garbage compression box power unit | |
| US7108473B2 (en) | Rear loader variable packing density system | |
| CN105947494A (en) | Movable trash compression box tail door hydraulic system | |
| CN108361233B (en) | Filling compression control system and post-filling compression garbage truck | |
| CN209506731U (en) | The control system and No leakage compression vehicle of No leakage compression vehicle | |
| CN112377474B (en) | Control method and control system for hydraulic system of vertical garbage compressor | |
| CN209853067U (en) | Garbage compression truck and hydraulic control system thereof | |
| CN220365791U (en) | Hydraulic control system of garbage truck and garbage truck | |
| CN206407452U (en) | Low failed-type trash compactor | |
| CN201746005U (en) | Positive backpressure independent adjusting hydraulic circuit for after-loading type garbage truck |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |