CN206530858U - Highlands weathering resistance type oil pumper lubricating arrangement - Google Patents
Highlands weathering resistance type oil pumper lubricating arrangement Download PDFInfo
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- CN206530858U CN206530858U CN201720174612.1U CN201720174612U CN206530858U CN 206530858 U CN206530858 U CN 206530858U CN 201720174612 U CN201720174612 U CN 201720174612U CN 206530858 U CN206530858 U CN 206530858U
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Abstract
The utility model discloses a kind of highlands weathering resistance type oil pumper lubricating arrangement, including grease-box, electronic lubricating pump, open and close type quick-release connector, next door joint and distributor and lubrication monitoring system, lubrication monitoring system includes the bottom bracket bearing sensor noise for being used to detect that bottom bracket bearing rotates noise, for detecting that shaft bearing rotates the shaft bearing sensor noise of noise, for detecting that a connecting-rod bearing rotates the first connecting rod bearing noise sensor of noise and for detecting that another connecting-rod bearing rotates the second connecting rod bearing noise sensor of noise, and the monitor controller for receiving the level of noise of above-mentioned each sensor noise output and control is alarmed when level of noise is more than preset value.The lubricating arrangement can not be shut down lubrication to oil pumper, it is not necessary to which workman carries out work high above the ground maintenance under the severe natural environment in high altitudes and cold area, reduces working strength, improves operating efficiency, improves the lubricating condition of bearing.
Description
Technical field
The utility model belongs to beam pumping unit technical field, is specifically related to a kind of highlands weathering resistance type oil pumping
Machine lubricating arrangement.
Background technology
The primary structure of beam pumping unit be from motor rotate by toggle be converted into sucker rod toward
Linear motion is by oil extraction in oil well, and the rotation portion of the oil pumper is provided with 3 pairs of bearings, i.e. axis and tailing axle respectively altogether
Two bearings are installed, the bearing that the two ends of crank-pin are respectively provided with a crank pin bearing, axis is referred to as bottom bracket bearing,
Bearing on tailing axle is referred to as crossbeam bearing, and bottom bracket bearing, crossbeam bearing make oscillating motion, and crank pin bearing rotates,
This several bearing rotating speed is very low, only 10 revs/min, but rated load reaches 8 tons, and its load character is alternation low-speed heave-load, warp
Often occur because insufficient lubrication causes bearing premature wear, even stuck phenomenon.
Current beam pumping unit needs the technical problem solved to be, how in highlands and high altitudes and cold
Area can timing, fixed point, quantitative, the non-stop-machine lubrication realized to bearing, improve the convenience of operating personnel, prevent work of ascending a height
Industry, reduces danger coefficient, reduces working strength, improves operating efficiency to improve the service life of beam pumping unit bearing, protects
The serviceability rate of oil pumper is demonstrate,proved, increase oil recovery amount is various equivalent modifications technical barrier urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to overcome that above-mentioned of the prior art not enough there is provided a kind of highlands weathering resistance type
Oil pumper lubricating arrangement.The lubricating arrangement can not be shut down lubrication to beam pumping unit, it is not necessary to which workman is in high and cold height
Work high above the ground maintenance is carried out under the severe natural environment in Altitude Regions, working strength is reduced, improves operating efficiency, improve
The lubricating condition of bearing, and the oil pipe of the lubricating arrangement has resistance to weathering energy, extends service life.
To achieve the above object, the technical solution adopted in the utility model is：Highlands weathering resistance type oil pumper lubricates
Device, it is characterised in that：Including grease-box, electronic lubricating pump, open and close type quick-release connector, next door joint and distributor and profit
Sliding monitoring system, the grease-box is arranged on the electronic lubricating pump, the outlet of the grease-box and the electronic profit
The entrance of sliding pump is connected, and the next door joint is arranged on the support of oil pumper, and the distributor is arranged on the trip of oil pumper
Liang Shang, the outlet of the electronic lubricating pump is connected with the open and close type quick-release connector, the open and close type quick-release connector with it is described
Next door joint is connected, and the next door joint is connected by the entrance of main oil pipe and distributor, the one outlet of the distributor
It is connected by the first oil distributing pipe with being used for the axis pump nozzle of bottom bracket bearing oiling, another outlet of the distributor is logical
Cross the second oil distributing pipe and for being connected to the tailing axle pump nozzle of shaft bearing oiling, the 3rd outlet of the distributor passes through the
Three oil distributing pipes with for be connected to the crank-pin pump nozzle of a connecting-rod bearing oiling, the 4th outlet of the distributor passes through the
Four oil distributing pipes are connected with being used for the crank-pin pump nozzle of another connecting-rod bearing oiling；The main oil pipe, the first oil distributing pipe,
Second oil distributing pipe, the 3rd oil distributing pipe and the 4th oil distributing pipe are black flexible pipe；The lubrication monitoring system includes being used to examine
Survey bottom bracket bearing and rotate the bottom bracket bearing sensor noise of noise, for detecting that shaft bearing rotates the shaft bearing noise of noise
Sensor, for detecting that connecting-rod bearing rotates the first connecting rod bearing noise sensor of noise and for detecting that another connects
Rod bearing rotates the second connecting rod bearing noise sensor of noise, and for receiving the noise of above-mentioned each sensor noise output
It is worth and is controlled when the level of noise is more than preset value the monitor controller of alarm, the bottom bracket bearing sensor noise, tailing axle
Bearing noise sensor, first connecting rod bearing noise sensor and second connecting rod bearing noise sensor with the monitoring and controlling
The input of device connects, and the output of the monitor controller is terminated with alarm.
Above-mentioned highlands weathering resistance type oil pumper lubricating arrangement, it is characterised in that：Including for heating lubricating oil
Temperature control system, the temperature control system includes being used to detect the temperature sensor of grease-box oil temperature, for receiving temperature
The temperature signal of degree sensor output simultaneously passes through the temperature controller of Control Resistant heating grease-box, the temperature
Sensor connects with the input of the temperature controller, and the output of the temperature controller is terminated with relay, the relay
One end of device connects with power supply, and the other end of the relay connects with resistance wire.
Above-mentioned highlands weathering resistance type oil pumper lubricating arrangement, it is characterised in that：Being provided with the support is used for
The first pipe clamp for fixing first oil distributing pipe is provided with the snap ring of the fixed main oil pipe, the walking beam and for solid
The first pipe for fixing the 3rd oil distributing pipe is provided with second pipe clamp of fixed second oil distributing pipe, a connecting rod of oil pumper
The second pipe collar for fixing the 4th oil distributing pipe is provided with hoop, another connecting rod of oil pumper.
Above-mentioned highlands weathering resistance type oil pumper lubricating arrangement, it is characterised in that：First pipe collar and described
Two pipe collars are hooping type pipe collar, and the first arc for positioning the 3rd oil distributing pipe is provided with the band of first pipe collar
Shape is raised, and the second arc convex for positioning the 4th oil distributing pipe is provided with the band of second pipe collar.
Above-mentioned highlands weathering resistance type oil pumper lubricating arrangement, it is characterised in that：The main oil pipe, first point of oil
Pipe, the second oil distributing pipe, the 3rd oil distributing pipe and the 4th oil distributing pipe are polyether-polyurethane flexible pipe.
The utility model has advantages below compared with prior art：
1st, it is of the present utility model simple in construction, it is novel in design reasonable.
2nd, the utility model uses the oil pipe being made up of black flexible pipe, improves the anti-uv-ray of oil pipe, reduces
Harm of the Exposure to Sunlight to oil pipe, and then serve certain weathering resistance effect.
3rd, the utility model can carry out effective automatic prison by setting lubrication monitoring system to the lubrication circumstances of bearing
Control, it is to avoid artificial to be lubricated inspection under the severe environmental conditions in high altitudes and cold area, effectively avoids insufficient lubrication from leading
Cause bearing premature wear, even stuck phenomenon.
4th, the utility model is by setting temperature control system, can effectively adapt to Gao Hai high altitude localities it is severe from
Right condition, when the temperature of grease-box is too low, passes through heating, it can be ensured that lubricating oil is smoothly conveyed in oil pipe.
5th, the utility model is by setting snap ring that main oil pipe is fixed, by setting the first pipe clamp to the first oil distributing pipe
It is fixed, by setting the second pipe clamp that the second oil distributing pipe is fixed, by setting the first pipe collar to enter the 3rd oil distributing pipe
Row is fixed, by setting the second pipe collar that the 4th oil distributing pipe is fixed, and can so be improved and be avoided high altitudes and cold area
Strong wind makes each oil pipe deviation position.
6th, the utility model using polyether-polyurethane flexible pipe or rubber hose be made main oil pipe, the first oil distributing pipe, second point
Oil pipe, the 3rd oil distributing pipe and the 4th oil distributing pipe, in such manner, it is possible to effectively improve the ageing resistace of oil pipe.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the structural representation that the utility model is arranged on beam pumping unit.
Fig. 2 is the schematic block circuit diagram that the utility model lubricates monitoring system.
Fig. 3 is the schematic block circuit diagram of the utility model temperature control system.
Fig. 4 is the structural representation of the pipe collar of the utility model first.
Description of reference numerals:
1-electronic lubricating pump；2-grease-box；
3-open and close type quick-release connector；4-next door joint；
5-snap ring；6-main oil pipe；
7-support；8-walking beam；
9-axis pump nozzle；10-the first oil distributing pipe；
11-the first pipe clamp；12-distributor；
13-the second oil distributing pipe；14-the second pipe clamp；
15-tailing axle；16-tailing axle pump nozzle；
17-connecting rod；18-the three oil distributing pipe；
19-the first pipe collar；19-1-band；
The arc convex of 19-2-first；19-3-hoop shell body；
19-4-locking worm screw；20-crank；
21-crank-pin pump nozzle；22-bottom bracket bearing sensor noise；
23-shaft bearing sensor noise；24-first connecting rod bearing noise sensor；
25-second connecting rod bearing noise sensor；26-monitor controller；
27-alarm；28-temperature sensor；
29-temperature controller；30-relay；
31-power supply；32-resistance wire.
Embodiment
A kind of highlands weathering resistance type oil pumper lubricating arrangement as shown in Figure 1, including grease-box 2, electronic lubrication
Pump 1, open and close type quick-release connector 3, next door joint 4 and distributor 12 and lubrication monitoring system, the grease-box 2 are arranged on institute
State on electronic lubricating pump 1, the outlet of the grease-box 2 is connected with the entrance of the electronic lubricating pump 1, the next door joint
4 are arranged on the support 7 of oil pumper, and the distributor 12 is arranged on the walking beam 8 of oil pumper, and the electronic lubricating pump 1 goes out
Mouthful be connected with the open and close type quick-release connector 3, the open and close type quick-release connector 3 is connected with the next door joint 4, it is described every
Wall joint 4 is connected by main oil pipe 6 with the entrance of distributor 12, and the one outlet of the distributor 12 passes through the first oil distributing pipe 10
With for being connected to the axis pump nozzle 9 of bottom bracket bearing oiling, another outlet of the distributor 12 passes through second point of oil
Pipe 13 is connected with being used for the tailing axle pump nozzle 16 of shaft bearing oiling, and the 3rd outlet of the distributor 12 passes through the 3rd point
Oil pipe 18 is connected with being used for the crank-pin pump nozzle 21 of a connecting-rod bearing oiling, and the 4th outlet of the distributor 12 passes through
4th oil distributing pipe is connected with being used for the crank-pin pump nozzle 21 of another connecting-rod bearing oiling.
As shown in Fig. 2 the lubrication monitoring system includes the bottom bracket bearing noise for being used to detect that bottom bracket bearing rotates noise
Sensor 22, for detect shaft bearing rotate noise shaft bearing sensor noise 23, for detect a connecting-rod bearing
Rotate the first connecting rod bearing noise sensor 24 of noise and for detecting that another connecting-rod bearing rotates the second connecting rod of noise
Bearing noise sensor 25, and for receiving the level of noise of above-mentioned each sensor noise output and being more than in the level of noise pre-
If during value control alarm monitor controller 26, the bottom bracket bearing sensor noise 22, shaft bearing sensor noise 23, the
The input of one connecting-rod bearing sensor noise 24 and second connecting rod bearing noise sensor 25 with the monitor controller 26
Connect, the output of the monitor controller 26 is terminated with alarm 27.
In the present embodiment, the lubricating arrangement when in use, open electronic lubricating pump 1, by electronic lubricating pump 1 by lubricating oil according to
Secondary to be pumped to distributor 12 through open and close type quick-release connector 3, next door joint 4 and main oil pipe 6, the allocated device 12 is passed through lubricating oil successively again
First oil distributing pipe 10 is delivered to axis pump nozzle 9, tailing axle pump nozzle 16 is delivered to through the second oil distributing pipe 13, through the 3rd oil distributing pipe 18
A crank-pin pump nozzle 21 is delivered to, another crank-pin pump nozzle 21 is delivered to through the 4th oil distributing pipe, passes through axis
Pump nozzle 9 injects lubricating oil in whole spaces of bottom bracket bearing, and lubricating oil is injected into shaft bearing by tailing axle pump nozzle 16
Whole spaces, inject lubricating oil by crank-pin pump nozzle 21 in whole spaces of the connecting-rod bearing, and then old lubricating oil is whole
Lubrication is not shut down in extrusion, realization, it is not necessary to which workman carries out work high above the ground guarantor under the severe natural environment in high altitudes and cold area
Support, reduce working strength, improve operating efficiency, improve the lubricating condition of bearing, it is to avoid the generation of dangerous accident,
Improve oil recovery amount.Meanwhile, by setting lubrication monitoring system, effective automatic prison can be carried out to the lubrication circumstances of bearing
Control, it is to avoid artificial to be lubricated inspection under the severe environmental conditions in high altitudes and cold area, effectively avoids insufficient lubrication from leading
Cause bearing premature wear, even stuck phenomenon.
In the present embodiment, the bottom bracket bearing that the axis pump nozzle 9 is used in place of being connected installed in walking beam 8 with support 7
Bottom bracket bearing oiling on seat, the tailing axle pump nozzle 16 is used for the shaft bearing installed in connecting rod 17 Yu the junction of tailing axle 15
Oiling, the crank-pin pump nozzle 21 is used for the connecting-rod bearing on the crank pin installed in crank 20 Yu the junction of connecting rod 17
Oiling.
In the present embodiment, noise preset value of the bearing when lubricating good is previously stored with the monitor controller 26,
And the level of noise conveyed by sensor noise is compared with preset value, when level of noise is more than preset value, at this time, it may be necessary to bearing
It is lubricated, then passes through alarm 27 and alarm, when level of noise is equal to or less than preset value, now, the lubrication circumstances of bearing
Well, it is not necessary to lubricate, so alarm 27 is not alarmed.
In the present embodiment, the main oil pipe 6, the first oil distributing pipe 10, the second oil distributing pipe 13, the 3rd oil distributing pipe 18 and described
Four oil distributing pipes are black flexible pipe.The oil pipe being made up of black flexible pipe, improves the anti-uv-ray of oil pipe, reduces Exposure to Sunlight
Harm to oil pipe, and then certain weathering resistance effect is served, extend the service life of the lubricating arrangement.
As shown in figure 3, the lubricating arrangement also includes the temperature control system for being used to heat lubricating oil, the temperature control system
System includes temperature sensor 28, the temperature signal for receiving the output of temperature sensor 28 for being used to detect the oil temperature of grease-box 2
And by relay 30 control resistance wire 32 heat grease-box 2 temperature controller 29, the temperature sensor 28 with it is described
The input of temperature controller 29 connects, and the output of the temperature controller 29 is terminated with relay 30, the relay 30
One end connects with power supply 31, and the other end of the relay 30 connects with resistance wire 32.
In the present embodiment, by setting temperature control system, can effectively adapt to Gao Hai high altitude localities it is severe from
Right condition, when the temperature of grease-box 2 is too low, passes through heating, it can be ensured that lubricating oil is smoothly conveyed in oil pipe.
As shown in figure 1, being provided with the snap ring 5 for fixing the main oil pipe 6 on the support 7, set on the walking beam 8
There are the first pipe clamp 11 for fixing first oil distributing pipe 10 and the second pipe clamp 14 for fixing second oil distributing pipe 13,
The first pipe collar 19 for fixing the 3rd oil distributing pipe 18, another connecting rod of oil pumper are provided with one connecting rod 17 of oil pumper
The second pipe collar for fixing the 4th oil distributing pipe is provided with 17.
In the present embodiment, by setting snap ring 5 that main oil pipe 6 is fixed, by setting 11 pairs first point of the first pipe clamp
Oil pipe 10 is fixed, by setting 14 pair of second oil distributing pipe 13 of the second pipe clamp to be fixed, by setting 19 pairs of the first pipe collar
3rd oil distributing pipe 18 is fixed, and by setting 19 pair of the 4th oil distributing pipe of the second pipe collar to be fixed, can so improve and avoid
The strong wind in high altitudes and cold area makes each oil pipe deviation position.
With reference to Fig. 1 and Fig. 4, first pipe collar 19 and second pipe collar are hooping type pipe collar, first pipe collar
The first arc convex 19-2 for positioning the 3rd oil distributing pipe 18 is provided with 19 band 19-1, second pipe collar
The second arc convex for positioning the 4th oil distributing pipe is provided with band.
In the present embodiment, because snap ring 5 is arranged on support 7, it can punch to facilitate installation snap ring in advance on support 7
5, similarly, it can be punched in advance on walking beam 8 and the first pipe clamp 11 and the second pipe clamp 14 are installed to facilitate, still, due to connecting rod 17
Position characteristics, punched on connecting rod 7 it is inconvenient, it is then, complete successively by the first pipe collar 19 of hooping type and the second pipe collar
The fixation of paired 3rd oil distributing pipe 18 and the 4th oil distributing pipe, especially sets the first arc convex on the first pipe collar 19
19-2, it is so more preferable to the locating effect of the 3rd oil distributing pipe 18, it is ensured that the 3rd oil distributing pipe 18 is not deviated by, similarly, described
Second arc convex is set on two pipe collars, it is so more preferable to the locating effect of the 4th oil distributing pipe, it is ensured that the 4th oil distributing pipe is not
It can deviate.
In the present embodiment, first pipe collar 19 is identical with the structure of second pipe collar.First pipe collar 19 and institute
Stating the second pipe collar includes band 19-1, hoop shell body 19-3 and locking worm screw 19-4.
In the present embodiment, the main oil pipe 6, the first oil distributing pipe 10, the second oil distributing pipe 13, the 3rd oil distributing pipe 18 and described
Four oil distributing pipes are polyether-polyurethane flexible pipe.In such manner, it is possible to effectively improve the ageing resistace of oil pipe.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure transformation made according to the utility model technical spirit to above example, still
Belong in the protection domain of technical solutions of the utility model.
Claims (5)
1. highlands weathering resistance type oil pumper lubricating arrangement, it is characterised in that：Including grease-box (2), electronic lubricating pump
(1), open and close type quick-release connector (3), next door joint (4) and distributor (12) and lubrication monitoring system, the grease-box (2)
On the electronic lubricating pump (1), the outlet of the grease-box (2) is connected with the entrance of the electronic lubricating pump (1)
Connect, the next door joint (4) is arranged on the support (7) of oil pumper, and the distributor (12) is arranged on the walking beam (8) of oil pumper
On, the outlet of the electronic lubricating pump (1) is connected with the open and close type quick-release connector (3), the open and close type quick-release connector (3)
It is connected with the next door joint (4), the next door joint (4) is connected by main oil pipe (6) with the entrance of distributor (12), institute
State the one outlet of distributor (12) by the first oil distributing pipe (10) with for axis pump nozzle (9) phase to bottom bracket bearing oiling
Connection, another outlet of the distributor (12) to the tailing axle of shaft bearing oiling by the second oil distributing pipe (13) and for noting
Oil nozzle (16) is connected, and the 3rd outlet of the distributor (12) passes through the 3rd oil distributing pipe (18) with being used for a connecting-rod bearing
Crank-pin pump nozzle (21) connection of oiling, the 4th outlet of the distributor (12) passes through the 4th oil distributing pipe with being used for another
The crank-pin pump nozzle (21) of individual connecting-rod bearing oiling is connected；The main oil pipe (6), the first oil distributing pipe (10), second point of oil
It is black flexible pipe to manage (13), the 3rd oil distributing pipe (18) and the 4th oil distributing pipe；The lubrication monitoring system includes being used to examine
Survey bottom bracket bearing and rotate the bottom bracket bearing sensor noise (22) of noise, for detecting that shaft bearing rotates the shaft bearing of noise
Sensor noise (23), for detecting that connecting-rod bearing rotates the first connecting rod bearing noise sensor (24) of noise and is used for
Detect that another connecting-rod bearing rotates the second connecting rod bearing noise sensor (25) of noise, and for receiving above-mentioned each noise
The level of noise of sensor output and the monitor controller (26) that control is alarmed when the level of noise is more than preset value, the axis
Bearing noise sensor (22), shaft bearing sensor noise (23), first connecting rod bearing noise sensor (24) and second connect
Input of the rod bearing sensor noise (25) with the monitor controller (26) connects, the monitor controller (26) it is defeated
Go out to be terminated with alarm (27).
2. highlands weathering resistance type oil pumper lubricating arrangement according to claim 1, it is characterised in that：Including for adding
The temperature control system of hot lubricating oil, the temperature control system includes the TEMP for being used to detect grease-box (2) oil temperature
Device (28), the temperature signal for receiving temperature sensor (28) output simultaneously control resistance wire (32) to heat by relay (30)
The temperature controller (29) of grease-box (2), the temperature sensor (28) and the input phase of the temperature controller (29)
Connect, the output of the temperature controller (29) is terminated with relay (30), one end and power supply (31) phase of the relay (30)
Connect, the other end of the relay (30) connects with resistance wire (32).
3. highlands weathering resistance type oil pumper lubricating arrangement according to claim 1, it is characterised in that：The support
(7) it is provided with the snap ring (5) for fixing the main oil pipe (6), the walking beam (8) and is provided with for fixing described first on
The first pipe clamp (11) of oil distributing pipe (10) and the second pipe clamp (14) for fixing second oil distributing pipe (13), the one of oil pumper
The first pipe collar (19) for fixing the 3rd oil distributing pipe (18), another connecting rod (17) of oil pumper are provided with individual connecting rod (17)
On be provided with the second pipe collar for fixing the 4th oil distributing pipe.
4. highlands weathering resistance type oil pumper lubricating arrangement according to claim 3, it is characterised in that：First pipe
It is hooping type pipe collar to bind round (19) and second pipe collar, is provided with the band (19-1) of first pipe collar (19) for fixed
It is provided with the first arc convex (19-2) of position the 3rd oil distributing pipe (18), the band of second pipe collar for positioning institute
State the second arc convex of the 4th oil distributing pipe.
5. highlands weathering resistance type oil pumper lubricating arrangement according to claim 1, it is characterised in that：The main oil pipe
(6), the first oil distributing pipe (10), the second oil distributing pipe (13), the 3rd oil distributing pipe (18) and the 4th oil distributing pipe are the poly- ammonia of polyethers
Ester flexible pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174612.1U CN206530858U (en) | 2017-02-24 | 2017-02-24 | Highlands weathering resistance type oil pumper lubricating arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174612.1U CN206530858U (en) | 2017-02-24 | 2017-02-24 | Highlands weathering resistance type oil pumper lubricating arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206530858U true CN206530858U (en) | 2017-09-29 |
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ID=59916747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720174612.1U Active CN206530858U (en) | 2017-02-24 | 2017-02-24 | Highlands weathering resistance type oil pumper lubricating arrangement |
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| Country | Link |
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| CN (1) | CN206530858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561742A (en) * | 2018-03-19 | 2018-09-21 | 徐工集团工程机械股份有限公司科技分公司 | Efficient loading system |
-
2017
- 2017-02-24 CN CN201720174612.1U patent/CN206530858U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561742A (en) * | 2018-03-19 | 2018-09-21 | 徐工集团工程机械股份有限公司科技分公司 | Efficient loading system |
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