CN206264860U - Self-unloading tipping prevention device - Google Patents
Self-unloading tipping prevention device Download PDFInfo
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- CN206264860U CN206264860U CN201621394709.5U CN201621394709U CN206264860U CN 206264860 U CN206264860 U CN 206264860U CN 201621394709 U CN201621394709 U CN 201621394709U CN 206264860 U CN206264860 U CN 206264860U
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- valve
- solenoid valve
- self
- normally open
- angular transducer
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Abstract
The utility model is related to a kind of self-unloading tipping prevention device, belong to dumper technical field, including processor and angular transducer, processor connects power supply and angular transducer, angular transducer is arranged on self-dumping undercarriage for automobile, processor signal output end is parallel with normally open solenoid valve A, normally open solenoid valve B and normally closed Unidirectional solenoid valve, Pneumatic valve is connected with the air inlet of normal open magnetic valve B, the gas outlet of normal open magnetic valve B is connected with the gas outlet of normally closed Unidirectional solenoid valve and the decline gas port of PT type lifting valves respectively, the air inlet of the air inlet of normally open solenoid valve A and normally closed electromagnetic valve of the individual event connects the gas outlet of limit valve, the gas outlet of normally open solenoid valve A is connected with the lifting gas port of PT type lifting valves.The utility model realizes dumper in the case where both sides ground injustice angle of inclination is more than setting safety value, and oil cylinder of dumper does not lift the function with automatic fall-back, is effectively guaranteed work safety and easy for installation, the easily realization of dumper driver and vehicle.
Description
Technical field
The utility model belongs to dumper technical field, and in particular to a kind of self-unloading tipping prevention device.
Background technology
At present, traditional dumper is installed and is divided into gas circuit and oil circuit.
As illustrated in fig. 1 and 2, gas circuit：Source of the gas 7 takes gas from automobile chassis, and the port of Pneumatic valve 6 is connected with source of the gas 7, gas control
The decline gas port of valve 6 is connected with the decline gas port of PT types lifting valve 3, and the lifting gas port of Pneumatic valve 6 connects with the air inlet of limit valve 5
Connect, the gas outlet of limit valve 5 is connected with the lifting gas port of PT types lifting valve 3.
Oil circuit：P mouthfuls of PT types lifting valve 3 is connected for high pressure oil inlet with the high-pressure oil outlet of gear pump 2, gear pump 2
Low pressure oil inlet is connected with the oil-out of fuel tank 1, and C mouthfuls of PT types lifting valve 3 is high-pressure oil outlet and the oil inlet of elevating ram 4
Connection, TT1, T2 mouthful of PT types lifting valve 3 is connected for low pressure oil return opening with fuel tank 1.
Traditional dumper course of work:
Source of the gas 7 takes gas from automobile chassis, and gas control manipulates hydraulic conversion.Power take-off valve is opened, gear pump 2 is started working,
C mouthfuls of PT types lifting valve 3 is communicated with T mouthfuls, while P mouthfuls communicates with T mouthfuls, T oral fluids force feed is back to fuel tank 1, and the sky of gear pump 2 is followed
Ring.
Lifting process：The handle of Pneumatic valve 6 is pushed into lift location, gas enters through the port of Pneumatic valve 6 in source of the gas 7
Enter, then gas enters along pipeline through the air inlet on limit valve 5, flowed out by the gas outlet of limit valve 5, gas is reached along pipeline
The lifting gas port of 3PT types lifting valve 3, gas push PT types lifting valve 3 is commutated, and P mouthfuls is connected with C mouthfuls, now, the liquid in fuel tank 1
Force feed is pressurizeed by gear pump 2, and C mouthfuls is turned through P mouthfuls of PT types lifting valve 3, subsequently into the cavity of resorption of elevating ram 4, promotes piston rod,
Compartment is set to start lifting, when carriage lifting is to maximum position, elevating ram 4 is pressed onto the contact of limit valve 5, the air inlet of limit valve 5
Cut off with gas outlet gas passage, gas is discharged in air by evacuation port, now, the lifting gas interface of PT types lifting valve 3 does not have
Air pressure, the automatic reverse of PT types lifting valve 3, the hydraulic oil of the pressurization of gear pump 2 passes through P mouthfuls of PT types lifting valve 3 and T mouthfuls flow back into oil
Case 1, the hydraulic oil of the inner chamber of elevating ram 4 is closed in elevating ram 4, and now elevating ram 4 is no longer lifted, and is parked in dominant bit
Put.
In stop process：" in stop " position when the handle of Pneumatic valve 6 is pushed into, gas is passed directly to by the port of Pneumatic valve 6
Vent, all no air pressure of lifting gas port and decline gas port of PT types lifting valve 3, the automatic reverse of PT types lifting valve 3, now
P mouthfuls and T mouthfuls of PT types lifting valve 3 is communicated, and C mouthfuls of cut-out, the piston of elevating ram 4 is remained stationary as, the hydraulic oil of the pressurization of gear pump 2
Turn T mouthfuls, direct oil return box 1, off-position in compartment holding by P mouthfuls of PT types lifting valve 3.
Decline process：When the handle of Pneumatic valve 6 is pushed into " decline " position, gas enters through the port of Pneumatic valve 6 in source of the gas 7
Enter and decline gas port, the decline gas port of PT types lifting valve 3, the automatic reverse of PT types lifting valve 3, now PT types act are then reached by the road
P mouthfuls of lift valve 3 and T mouthfuls communicate, C mouthfuls also connected with T, the cavity of resorption hydraulic oil of elevating ram 4 flows back to fuel tank 1 by PT types lifting valve 3,
The idle loop of gear pump 2, compartment is by deadweight homing.
Therefore traditional dumper overturns when unloading, and is current extremely common problem, domestic also without any effective
Means are tumbled preventing dumper.To find out its cause, thumping majority belongs to the out-of-flatness of discharging ground makes left and right vehicle wheel both sides height not
Unanimously, lifting tailheaviness skew causes slide-out.However, many times driver cannot be selected stock ground environment, drive
Land leveling state is even more and is difficult to judge during sailing, so Frequent Accidents, severe patient even results in the tragedy of car crash.
Utility model content
The purpose of this utility model is to provide a kind of self-unloading tipping prevention device, realizes dumper uneven on both sides ground
More than in the case of setting value, oil cylinder of dumper does not lift the function with automatic fall-back, is effectively guaranteed self-unloading at angle of inclination
Car driver and the work safety of vehicle.
The utility model self-unloading tipping prevention device, including processor and angular transducer, processor connection power supply and angle
Degree sensor, angular transducer is arranged on self-dumping undercarriage for automobile, and processor signal output end is parallel with normally open solenoid valve A, normally opened
Magnetic valve B and normally closed Unidirectional solenoid valve, the decline gas port of Pneumatic valve are connected with the air inlet of normal open magnetic valve B, normal open magnetic valve B
Gas outlet be connected with the gas outlet of normally closed Unidirectional solenoid valve and the decline gas port of PT type lifting valves respectively, the lifting gas of Pneumatic valve
Mouth is connected with the air inlet of limit valve, the air inlet connection limit valve of the air inlet of normally open solenoid valve A and normally closed electromagnetic valve of the individual event
Gas outlet, the gas outlet of normally open solenoid valve A is connected with the lifting gas port of PT type lifting valves.
The power supply is 24V storage batterys, and the power interface of the processor is connected with 24V positive and negative poles of battery respectively, processor
Sensor interface be connected with angular transducer, signal output part one end of processor is connected with storage battery positive pole, the other end difference
It is connected with normally open solenoid valve A, normally open solenoid valve B and normally closed Unidirectional solenoid valve, normally open solenoid valve A, normally open solenoid valve B and normally closed list
To another termination storage battery negative pole of magnetic valve.
The gas outlet of the normal open magnetic valve B by three-way connection respectively with the gas outlet of normally closed Unidirectional solenoid valve and
The decline gas port connection of PT type lifting valves, is easy for installation and removal.
The gas outlet of the limit valve by three-way connection respectively with the air inlet of normally open solenoid valve A and normally closed unidirectional
The air inlet connection of magnetic valve, is easy for installation and removal.
The sensor interface of the processor is connected by snap joint with angular transducer, convenient to install and change.
The angular transducer is arranged on self-dumping undercarriage for automobile afterbody lower section middle by adjusting means, and it is more accurate to detect.
The adjusting means includes connecting plate and regulating bolt, and connecting plate upper end is fixed in self-dumping undercarriage for automobile afterbody lower section
Between locate, connecting plate lower end is provided with two adjustment holes, and a through hole and a strip hole, two tune are provided with angular transducer
Section bolt is each passed through through hole, strip hole and angular transducer is arranged on connecting plate bottom, and regulation angular transducer more facilitates.
Compared with prior art, the utility model has the advantage of：
1st, this patent compensate for deficiency of traditional dumper in safety in utilization, and the hydraulic control gas circuit to dumper is entered
Go repacking, realize dumper in the case where both sides ground injustice angle of inclination is more than setting safety value, oil cylinder of dumper
The function with automatic fall-back is not lifted, is effectively guaranteed the work safety of dumper driver and vehicle.
2nd, dumper whole system is easy installation and reliable, and either new car is installed or used car transformation is all easily achieved.
3rd, with low cost, maintenance is convenient, fault rate is low, stable performance.
Brief description of the drawings
Fig. 1 is the hydraulic system scheme of installation of traditional dumper；
Fig. 2 is the hydraulic system principle figure of traditional dumper；
Fig. 3 is the utility model scheme of installation；
Fig. 4 is hydraulic schematic diagram of the present utility model；
Fig. 5 is circuit theory diagrams of the present utility model；
Fig. 6 is dumper structural representation；
Fig. 7 is the sectional view of the A-A of Fig. 6；
Fig. 8 is the enlarged diagram at the Y of Fig. 6；
Fig. 9 is the enlarged diagram at X in Fig. 7；
In figure：1st, fuel tank, 2, gear pump, 3, PT type lifting valves, 4, elevating ram, 5, limit valve, 6, Pneumatic valve, 7, gas
Source, 8, normally open solenoid valve A, 9, normally open solenoid valve B, 10, normally closed Unidirectional solenoid valve, 11, processor, 12, angular transducer, 13,
Through hole, 14, strip hole, 15, connecting plate, 16, regulating bolt.
Specific embodiment
Below against accompanying drawing, specific embodiment of the present utility model is described in further detail.
Self-unloading tipping prevention device as shown in Figures 3 and 4, including processor 11 and angular transducer 12, processor 11 connect
Power supply and angular transducer 12 are connect, angular transducer 12 is arranged on self-dumping undercarriage for automobile, and the signal output part of processor 11 is parallel with
Normally open solenoid valve A8, normally open solenoid valve B9 and normally closed Unidirectional solenoid valve 10.During installation, by adjusting fixed angle sensor 12
Screw so that the zero line position that angular transducer 12 is in when 0 ° of self-dumping undercarriage for automobile.
Gas circuit is connected：Source of the gas 7 takes gas from automobile chassis, and the port of Pneumatic valve 6 is connected with source of the gas 7, the decline of Pneumatic valve 6
Gas port is connected with the air inlet of normal open magnetic valve B, the gas outlet of normal open magnetic valve B respectively with the outlet of normally closed Unidirectional solenoid valve 10
The decline gas port of mouth and PT types lifting valve 3 is connected, and the lifting gas port of Pneumatic valve 6 is connected with the air inlet of limit valve 5, normally opened electromagnetism
The air inlet of the air inlet of valve A8 and normally closed electromagnetic valve of the individual event connects the gas outlet of limit valve 5, the gas outlet of normally open solenoid valve A8
Lifting gas port with PT types lifting valve 3 is connected.
Oil circuit is connected：P mouthfuls of PT types lifting valve 3 is connected for high pressure oil inlet with the high-pressure oil outlet of gear pump 2, gear pump
2 low pressure oil inlet is connected with the oil-out of fuel tank 1, C mouthfuls of PT types lifting valve 2 entering for high-pressure oil outlet and elevating ram 4
Hydraulic fluid port is connected, and TT1, T2 mouthful of PT types lifting valve 3 is connected for low pressure oil return opening with fuel tank 1.
As shown in figure 5, circuit is connected：The power supply is 24V storage batterys, the power interface of the processor 11 respectively with 24V
Positive and negative poles of battery is connected, and the sensor interface of processor 11 is connected with angular transducer 12, the signal output part one of processor 11
End is connected with storage battery positive pole, and the other end is connected with normally open solenoid valve A8, normally open solenoid valve B9 and normally closed Unidirectional solenoid valve 10 respectively,
Another termination storage battery negative pole of normally open solenoid valve A8, normally open solenoid valve B9 and normally closed Unidirectional solenoid valve 10.
The gas outlet of the normal open magnetic valve B by three-way connection respectively with the gas outlet of normally closed Unidirectional solenoid valve 10
Decline gas port with PT types lifting valve 3 is connected.
The gas outlet of the limit valve 5 by three-way connection respectively with the air inlet and normally closed list of normally open solenoid valve A8
Connected to the air inlet of magnetic valve 10.
The sensor interface of the processor 11 is connected by snap joint with angular transducer 12, and processor passes through bolt
Installed in driver's cabin.
As shown in Figure 6 and Figure 7, the angular transducer 12 is arranged in self-dumping undercarriage for automobile afterbody lower section by adjusting means
Between locate.
As shown in Figure 8 and Figure 9, adjusting means includes connecting plate 15 and regulating bolt 16, and the upper end of connecting plate 15 is fixed on certainly
Chassis afterbody lower section middle is unloaded, the lower end of connecting plate 15 is provided with two adjustment holes, one is provided with angular transducer 12
Through hole 13 and a strip hole 14, two regulating bolts 16 are each passed through through hole 13, strip hole 14 and angular transducer 12 are installed
In the bottom of connecting plate 15.
The course of work of system after repacking
Source of the gas 7 takes gas from automobile chassis, and gas control manipulates hydraulic conversion.Power take-off valve is opened, gear pump 2 is started working,
C mouthfuls of PT types lifting valve 3 is communicated with T mouthfuls, while P mouthfuls communicates with T mouthfuls, T oral fluids force feed is back to fuel tank 1, and the sky of gear pump 2 is followed
Ring.
The lifting course of work：
When the handle of Pneumatic valve 6 is pushed into " lifting " position, gas enters through the port of Pneumatic valve 6 in source of the gas 7, Ran Houqi
Body enters along pipeline through the air inlet on limit valve 5, is flowed out by the gas outlet of limit valve 5, along pipeline through normally open solenoid valve A8.
When dumper angle of inclination is less than setting safety value, angular transducer 12 is delivered to the electric signal at angle of inclination
Processor 11, the relay opening of the internal output terminal of processor 11, normally open solenoid valve A8, normally open solenoid valve B9 and normally closed unidirectional electricity
The no current of magnet valve 10 passes through, and normally open solenoid valve A8, normally open solenoid valve B9 ventilation, normally closed Unidirectional solenoid valve 10 are closed, and gas is along pipe
Road reaches the lifting gas port of PT types lifting valve 3, and gas push PT types lifting valve 3 commutates, and P mouthfuls is connected with C mouthfuls, now, in fuel tank 1
Hydraulic oil pressurizeed by gear pump 2, turn C mouthfuls through P mouthfuls of PT types lifting valve 3, subsequently into the cavity of resorption of elevating ram 4, promote and live
Stopper rod, makes compartment start lifting, and when carriage lifting is to maximum position, elevating ram 4 is pressed onto the contact of limit valve 5, the air inlet of limit valve 5
Mouth is discharged in air with the cut-out of gas outlet gas passage, gas by evacuation port, and now, the lifting gas interface of PT types lifting valve 3 does not have
There is air pressure, the automatic reverse of PT types lifting valve 3, the hydraulic oil of the pressurization of gear pump 2 is flow back into by P mouthfuls of PT types lifting valve 3 with T mouthfuls
Fuel tank 1, the hydraulic oil of the inner chamber of elevating ram 4 is closed in elevating ram 4, and now elevating ram 4 is no longer lifted, and is parked in maximum
Position.
When ground is uneven, when dumper angle of inclination is more than setting value, electric signal of the angular transducer 12 angle of inclination
It is delivered to processor 11, the cut-off of the internal output terminal of processor 11, normally open solenoid valve A8, normally open solenoid valve B9 and normally closed
Unidirectional solenoid valve 10 has electric current to pass through, and normally open solenoid valve A8, normally open solenoid valve B9 are closed, and normally closed Unidirectional solenoid valve 10 is opened logical
Gas, gas reaches the decline gas port of PT types lifting valve 3 along pipeline, and gas push PT types lifting valve 3 commutates, the P of PT types lifting valve 3
Mouthful and T mouthfuls communicate, C mouthfuls also connected with T, the cavity of resorption hydraulic oil of elevating ram 4 flows back to fuel tank 1, gear pump 2 by PT types lifting valve 3
Idle loop, compartment falls by deadweight.
When dumper, the height change of two-wheeled causes that chassis angle of inclination becomes larger because of before and after in uphill process, and
And during more than setting safety value, the electric signal at angle of inclination is delivered to processor 11 by angular transducer 12, inside processor 11
The cut-off of output end, normally open solenoid valve A8, normally open solenoid valve B9 and normally closed Unidirectional solenoid valve 10 have electric current to pass through, normally opened
Magnetic valve A8, normally open solenoid valve B9 are closed, and normally closed Unidirectional solenoid valve 10 opens ventilation, and gas reaches PT types lifting valve 3 along pipeline
Decline gas port, gas push PT types lifting valve 3 commutates, P mouthfuls and T mouthfuls of PT types lifting valve 3 communicate, C mouthfuls also connected with T, lift
The cavity of resorption hydraulic oil of oil-lifting jar 4 flows back to fuel tank 1 by PT types lifting valve 3, and the idle loop of gear pump 2, compartment falls by deadweight.
In stop process：" in stop " position when the handle of Pneumatic valve 6 is pushed into, gas is passed directly to by the port of Pneumatic valve 6
The electric signal at angle of inclination is delivered to processor 11 by vent, angular transducer 12, the internal output terminal of processor 11
Relay is opened, and normally open solenoid valve A8, normally open solenoid valve B9 and the no current of normally closed Unidirectional solenoid valve 10 pass through, normally open solenoid valve
A8, normally open solenoid valve B9 are ventilated, and normally closed Unidirectional solenoid valve 10 is closed, and the lifting gas port and decline gas port of PT types lifting valve 3 all do not have
There is air pressure, the automatic reverse of PT types lifting valve 3, now the P of PT types lifting valve 3 mouthfuls and T mouthful is communicated, and C mouthfuls is cut off, elevating ram 4
Piston is remained stationary as, and the hydraulic oil of the pressurization of gear pump 2 turns T mouthfuls, direct oil return box 1, compartment guarantor by P mouthful of PT types lifting valve 3
Hold middle off-position.
Decline process：When the handle of Pneumatic valve 6 is pushed into " decline " position, gas enters through the port of Pneumatic valve 6 in source of the gas 7
Enter and decline gas port, the decline gas port of PT types lifting valve 3, electric signal of the angular transducer 12 angle of inclination are then reached by the road
It is delivered to processor 11, the relay of the internal output terminal of processor 11 is opened, normally open solenoid valve A8, normally open solenoid valve B9 and normally closed
The no current of Unidirectional solenoid valve 10 passes through, and normally open solenoid valve A8, normally open solenoid valve B9 ventilation, normally closed Unidirectional solenoid valve 10 are closed, PT
The automatic reverse of type lifting valve 3, now the P of PT types lifting valve 3 mouthfuls and T mouthfuls communicate, C mouthfuls also connected with T, the cavity of resorption liquid of elevating ram 4
Force feed flows back to fuel tank 1 by PT types lifting valve 3, the idle loop of gear pump 2, and compartment is by homing of conducting oneself with dignity.
The above is that the utility model is exemplarily described, it is clear that the utility model is implemented does not receive above-mentioned side
The limitation of formula, whether does any change in its shape or structure, if employ method of the present utility model design and
The improvement of the various unsubstantialities that technical scheme is carried out, or it is not improved by it is of the present utility model design and technical scheme directly should
For other occasions, within protection domain of the present utility model.
Claims (7)
1. a kind of self-unloading tipping prevention device, it is characterised in that：Including processor (11) and angular transducer (12), processor
(11) connect power supply and angular transducer (12), angular transducer (12) on self-dumping undercarriage for automobile, processor (11) signal
Output end is parallel with normally open solenoid valve A (8), normally open solenoid valve B (9) and normally closed Unidirectional solenoid valve (10), the decline of Pneumatic valve (6)
Gas port is connected with the air inlet of normal open magnetic valve B, and the gas outlet of normal open magnetic valve B goes out with normally closed Unidirectional solenoid valve (10) respectively
The decline gas port connection of gas port and PT types lifting valve (3), the lifting gas port of Pneumatic valve (6) is connected with the air inlet of limit valve (5),
The gas outlet of the air inlet of normally open solenoid valve A (8) and air inlet connection limit valve (5) of normally closed electromagnetic valve of the individual event, normally opened electromagnetism
The gas outlet of valve A (8) is connected with the lifting gas port of PT types lifting valve (3).
2. self-unloading tipping prevention device according to claim 1, it is characterised in that：The power supply is 24V storage batterys, the place
The power interface of reason device (11) is connected with 24V positive and negative poles of battery respectively, the sensor interface and angular transducer of processor (11)
(12) connect, signal output part one end of processor (11) is connected with storage battery positive pole, the other end respectively with normally open solenoid valve A (8),
Normally open solenoid valve B (9) and normally closed Unidirectional solenoid valve (10) are connected, normally open solenoid valve A (8), normally open solenoid valve B (9) and normally closed list
To another termination storage battery negative pole of magnetic valve (10).
3. self-unloading tipping prevention device according to claim 1, it is characterised in that：The gas outlet of the normal open magnetic valve B
Connected with the gas outlet of normally closed Unidirectional solenoid valve (10) and the decline gas port of PT types lifting valve (3) respectively by a three-way connection
Connect.
4. self-unloading tipping prevention device according to claim 1, it is characterised in that：The gas outlet of the limit valve (5) leads to
A three-way connection is crossed to be connected with the air inlet of normally open solenoid valve A (8) and the air inlet of normally closed Unidirectional solenoid valve (10) respectively.
5. self-unloading tipping prevention device according to claim 2, it is characterised in that：The sensor of the processor (11) connects
Mouth is connected by snap joint with angular transducer (12).
6. self-unloading tipping prevention device according to claim 1 or 5, it is characterised in that：The angular transducer (12) is led to
Toning regulating device is arranged on self-dumping undercarriage for automobile afterbody lower section middle.
7. self-unloading tipping prevention device according to claim 6, it is characterised in that：The adjusting means includes connecting plate
(15) and regulating bolt (16), connecting plate (15) upper end is fixed on self-dumping undercarriage for automobile afterbody lower section middle, under connecting plate (15)
End is provided with two adjustment holes, and a through hole (13) and a strip hole (14), two tune are provided with angular transducer (12)
Section bolt (16) is each passed through through hole (13), strip hole (14) angular transducer (12) installed in connecting plate (15) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621394709.5U CN206264860U (en) | 2016-12-19 | 2016-12-19 | Self-unloading tipping prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621394709.5U CN206264860U (en) | 2016-12-19 | 2016-12-19 | Self-unloading tipping prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206264860U true CN206264860U (en) | 2017-06-20 |
Family
ID=59046137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621394709.5U Expired - Fee Related CN206264860U (en) | 2016-12-19 | 2016-12-19 | Self-unloading tipping prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206264860U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740364A (en) * | 2016-12-19 | 2017-05-31 | 山东梁山沃德汽车制造有限公司 | Self-unloading tipping prevention device |
| CN112455308A (en) * | 2020-12-08 | 2021-03-09 | 安徽江淮汽车集团股份有限公司 | Dumper lifting device and dumper |
-
2016
- 2016-12-19 CN CN201621394709.5U patent/CN206264860U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740364A (en) * | 2016-12-19 | 2017-05-31 | 山东梁山沃德汽车制造有限公司 | Self-unloading tipping prevention device |
| CN112455308A (en) * | 2020-12-08 | 2021-03-09 | 安徽江淮汽车集团股份有限公司 | Dumper lifting device and dumper |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170620 Termination date: 20191219 |