CN108545492B - Novel bucket wheel mechanism for bucket wheel material taking machine - Google Patents
Novel bucket wheel mechanism for bucket wheel material taking machine Download PDFInfo
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- CN108545492B CN108545492B CN201810354673.5A CN201810354673A CN108545492B CN 108545492 B CN108545492 B CN 108545492B CN 201810354673 A CN201810354673 A CN 201810354673A CN 108545492 B CN108545492 B CN 108545492B
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- bucket
- ring
- wheel
- frame
- bucket wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/02—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads
- B65G65/16—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads with rotary pick-up conveyors
- B65G65/20—Paddle wheels
Abstract
The invention discloses a bucket wheel mechanism for a novel bucket wheel material taking machine, which comprises a bucket, a bucket mounting ring, a bucket wheel driving device, a frame, a traveling trolley, a trolley driving device, a horizontal guide wheel and a catch wheel, wherein the traveling trolley, the horizontal guide wheel and the catch wheel are respectively contacted with a movable beam of the material taking machine; the bucket mounting rings are connected with a bucket wheel driving device, and the bucket wheel driving device is mounted on the frame; the traveling trolley is connected with the frame through a hinge shaft, the trolley driving device is installed inside the frame, and the trolley driving device drives the traveling trolley to do horizontal linear motion along the hinge shaft through a gear rack mechanism. The invention has the advantages of ingenious conception, compact and reasonable structure, stable operation and convenient operation by adopting a closed gear bearing driving mode and adopting multi-motor driving, improves the reliability of long-time and continuous work and is beneficial to large-scale popularization.
Description
Technical Field
The invention relates to the technical field of material conveying equipment, in particular to a bucket wheel mechanism for a novel bucket wheel material taking machine.
Background
The bucket-wheel stacker reclaimer is a high-efficiency device for continuously loading and unloading a large amount of bulk materials in the modern industry, and is widely applied to the stacking and reclaiming operation of bulk material (ore, coal, coke and gravel) storage yards of ports, docks, metallurgy, cement, iron and steel plants, coking plants, coal storage plants, power plants and the like at present. In the prior art, door type bucket-wheel reclaimers are more applied to mines, cargo yards, docks, grain depots and the like. The bucket wheel rolling ring driving form in the material taking machine in the prior art adopts external engagement pin wheel pin tooth transmission, so that the problems of unstable transmission, too fast abrasion of a gear and a pin bush, large vibration, unreasonable structural design and inconvenience in maintenance and use exist. Therefore, how to develop a novel bucket wheel mechanism to eliminate the transmission unstability, wearing and tearing too big, the maintenance is used inconvenient problem.
Disclosure of Invention
The invention aims to provide a novel bucket wheel mechanism for a bucket wheel material taking machine, which solves the problems that in the prior art, the bucket wheel rolling ring drive adopts external meshing pin wheel pin tooth transmission, the transmission is not stable, the gear and a pin bushing are abraded too fast, the vibration is large, and the bucket wheel mechanism is inconvenient to maintain and use.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses a bucket wheel mechanism for a novel bucket wheel material taking machine, which comprises a bucket, a bucket mounting ring, a bucket wheel driving device, a frame, a walking trolley, a trolley driving device, a horizontal guide wheel and a catch wheel, wherein the walking trolley, the horizontal guide wheel and the catch wheel are respectively contacted with a movable beam of the material taking machine;
a plurality of buckets are connected to the outer edge of the bucket mounting ring and are uniformly arranged; the bucket mounting ring is connected with the bucket wheel driving device, and the bucket wheel driving device is mounted on the frame;
the trolley driving device drives the walking trolley to do horizontal linear motion along the hinge shaft through the gear rack mechanism;
the horizontal guide wheel is connected to the side face of the frame, and the top end cambered surface of the horizontal guide wheel is connected with the side face of the movable beam of the reclaimer and moves along the side face;
the blocking wheels are connected below the frame, and the top arc surfaces of the blocking wheels are in contact with the bottom side rails of the movable beams of the reclaimer and move along the rails.
Furthermore, be provided with connecting seat and hopper on the scraper bowl collar, connecting seat global design is the annular shape, the scraper bowl collar pass through the connecting seat with bucket wheel drive arrangement is connected, the hopper is installed the inboard position in top of connecting seat, the exit end of hopper is located the top of conveyer belt.
Still further, the bucket wheel driving devices are provided with two sets, and the two sets of bucket wheel driving devices are located on two sides of the bucket and are symmetrically arranged.
Still further, the bucket wheel driving device comprises a driving speed reduction motor, a pinion, a gear bearing, a supporting seat, an outer sealing sleeve, an outer ring gland, an outer sealing ring, an outer ring spacer ring, an outer ring grease pipe, an inner ring gland, an inner sealing sleeve, an inner sealing ring, an inner ring spacer ring and an inner ring grease pipe, wherein the driving speed reduction motor is installed on the frame, the pinion is installed at the end of the working end of the driving speed reduction motor, the pinion is meshed with an outer gear ring of the gear bearing, an inner ring of the gear bearing is fixedly connected with a bearing seat arranged on the frame, and an outer ring of the gear bearing is connected with the inner side of the supporting seat; the outer sealing sleeve is connected with the supporting seat through a bolt, the outer ring gland is connected with the frame through a bolt, the outer sealing ring is located in a groove of the outer ring spacer ring, and the outer ring spacer ring is connected with the frame and limited through the outer ring gland; the outer lane grease pipe is installed the inboard of frame, the inner circle gland with supporting seat bolted connection, the inner seal circle is located in the recess of inner circle spacer ring and all with the supporting seat contact is connected and is passed through the inner circle gland carries on spacingly, the inner seal cover with the frame passes through bolted connection, the inner circle grease pipe is installed at the frame inboard.
Still further, drive gear motor adopts trinity gear motor, gear motor specifically adopts variable frequency brake motor, every set bucket wheel drive arrangement contains four drive gear motor and evenly arranges.
Still further, the gear bearing is designed to be a three-row cylindrical roller bearing, and an outer ring of the cylindrical roller bearing is a large gear ring.
Furthermore, the fixed end of the outer ring grease pipe is communicated with the through hole in the outer ring spacer ring, and lubricating grease is filled between the outer sealing sleeve and the outer sealing ring through the outer ring grease pipe; the fixed end of the inner ring grease pipe is communicated with the through hole in the frame, the through hole in the frame is in a straight line with the axis of the through hole in the inner ring spacer ring, and lubricating grease is filled in the inner seal sleeve and the inner seal ring through the inner ring grease pipe.
Still further, the connecting seat is connected to the supporting seat through a bolt assembly.
A reclaimer, includes as above-mentioned novel bucket wheel mechanism for reclaimer of any one.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention provides a bucket wheel mechanism for a novel bucket wheel material taking machine, which comprises a bucket, a bucket mounting ring, a bucket wheel driving device, a frame, a traveling trolley, a trolley driving device, a horizontal guide wheel and a catch wheel, wherein the traveling trolley, the horizontal guide wheel and the catch wheel are respectively in contact connection with a movable beam of the material taking machine and play a role in positioning and guiding in movement so as to ensure the stability of the frame in movement; the bucket wheel driving devices are symmetrically provided with two groups and are arranged on two sides of the bucket mounting ring, a closed gear bearing connecting structure is adopted, a multi-drive speed reduction motor is adopted to provide driving force, the safety redundancy is high, the operation is stable, the replacement is easy, the maintenance amount is reduced, the reliability of long-time and continuous work is improved, and the maintenance time is effectively shortened; this bucket wheel mechanism has cancelled the rotation support bearing wheel of traditional structure, adopts the whole rotatory form of base bearing, solves horizontal hunting, and the bearing wheel is often by the greasy dead risk that does not change of material, solves traditional bucket wheel drive meshing's such as apical tooth, reducing gear box broken shaft problem. The invention has the advantages of ingenious conception, compact and reasonable structure, stable operation and convenient operation by adopting a closed gear bearing driving mode and adopting multi-motor driving, improves the reliability of long-time and continuous work and is beneficial to large-scale popularization.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a front view of a bucket wheel mechanism for a bucket wheel reclaimer of the present invention;
FIG. 2 is a side view of a bucket wheel mechanism for the novel bucket wheel reclaimer of the present invention;
FIG. 3 is a structural view of a bucket wheel driving apparatus according to the present invention;
FIG. 4 is a layout diagram of an outer sealing ring of the bucket wheel driving device of the present invention;
FIG. 5 is a view showing the arrangement of a seal ring in the bucket wheel driving apparatus according to the present invention;
description of reference numerals: 100. a bucket; 200. a bucket mounting ring; 201. a connecting seat; 202. a receiving hopper;
300. a bucket wheel drive; 301. driving a gear motor; 302. a pinion gear; 303. a gear bearing; 304. a supporting seat; 305. an outer sealing sleeve; 306. an outer ring gland bush; 307. an outer sealing ring; 308. an outer ring spacer ring; 309. an outer ring grease pipe; 310. an inner ring gland bush; 311. an inner sealing sleeve; 312. an inner seal ring; 313. an inner ring spacer ring; 314. an inner ring grease pipe; 315. lubricating grease;
400. a frame; 401. a bearing seat;
500. a traveling carriage; 501. a hinge shaft;
600. a trolley drive device; 601. a rack and pinion mechanism;
700. a horizontal guide wheel; 800. a catch wheel; 900. a movable beam.
Detailed Description
As shown in fig. 1 to 5, a bucket wheel mechanism for a novel bucket wheel reclaimer comprises a bucket 100, a bucket mounting ring 200, a bucket wheel driving device 300, a frame 400, a traveling trolley 500, a trolley driving device 600, a horizontal guide wheel 700 and a catch wheel 800, wherein the traveling trolley 500, the horizontal guide wheel 700 and the catch wheel 800 are respectively in contact with a movable beam 900 of the reclaimer; when the trolley driving device 600 is used, the traveling trolley 500 is driven to move along the upper track of the movable beam to drive the whole bucket wheel mechanism to move forwards and backwards; bucket wheel drive device 300 rotates bucket 100 to perform a material picking operation.
A plurality of the buckets 100 are connected to the outer edge of the bucket mounting ring 200 and are uniformly arranged; the bucket mounting ring 200 is connected to the bucket wheel driving device 300, and the bucket wheel driving device 300 is mounted on the frame 400; in the embodiment of the present invention, nine buckets 100 are provided and are uniformly distributed circumferentially.
The traveling trolley 500 is connected with the frame 400 through a hinge shaft 501, the trolley driving device 600 is installed inside the frame 400, the rack and pinion mechanism 601 is installed on the side surface of the movable beam, and the trolley driving device 600 drives the traveling trolley 500 to move horizontally and linearly along the hinge shaft 501 through the rack and pinion mechanism 601; particularly, rack and pinion mechanism 601 includes driving motor, rack and gear train, driving motor sets up one side and the vertical installation of walking platform truck 500 on frame 400, this driving motor's work end is connected with the driving gear, the rack passes through the side of bolt fixed connection on the walking beam, every walking platform truck 500's below fixed mounting has two driven gears side by side, the driving gear pass through drive gear with driven gear meshes mutually, and driving gear, drive gear and driven gear arbitrary adjacent two intermeshing constitute the gear train, and driving motor starts and drives walking platform truck 500 horizontal migration through the gear train, thereby drives equipment whole horizontal migration such as the scraper bowl on frame 400 and the frame.
The horizontal guide wheel 700 is connected to the side surface of the frame 400, and the top end arc surface of the horizontal guide wheel 700 is connected with the side surface of the movable beam of the reclaimer and moves along the side surface; the catch wheel 800 is connected below the frame 400, the top arc surface of the catch wheel 800 contacts with the bottom side rail of the movable beam of the reclaimer and moves along the rail, and when the reclaimer moves on the movable beam, the horizontal guide wheel 700 and the catch wheel 800 play a role in positioning and guiding, so that the stability in the moving process is ensured.
The bucket mounting ring 200 is provided with a connecting seat 201 and a receiving hopper 202, the connecting seat 201 is integrally designed into a circular ring shape, the bucket mounting ring 200 is connected with the bucket wheel driving device 300 through the connecting seat 201, the receiving hopper 202 is mounted at the inner side position of the top of the connecting seat 201, and the outlet end of the receiving hopper 202 is positioned above the conveying belt.
As shown in fig. 1, the bucket wheel driving device 300 has two sets, and the two sets of the bucket wheel driving device 300 are located at both sides of the bucket 100 and are symmetrically arranged.
As shown in fig. 2 to 5, the bucket wheel driving device 300 includes a driving gear motor 301, a pinion 302, a gear bearing 303, a supporting seat 304, an outer sealing sleeve 305, an outer sealing cover 306, an outer sealing ring 307, an outer ring spacer 308, an outer ring grease pipe 309, an inner sealing cover 310, an inner sealing sleeve 311, an inner sealing ring 312, an inner ring spacer 313 and an inner ring grease pipe 314, the driving gear motor 301 is mounted on the frame 400, the pinion 302 is mounted at a working end of the driving gear motor 301, the pinion 302 is engaged with an outer ring gear of the gear bearing 303, an inner ring of the gear bearing 303 is fixedly connected with a bearing seat 401 provided on the frame 400, and an outer ring of the gear bearing 303 is connected with an inner side of the supporting seat 304; the outer sealing sleeve 305 is connected with the supporting seat 304 through a bolt, and the connecting seat 201 is connected to the supporting seat 304 through a bolt assembly; the outer ring gland 306 is connected with the frame 400 through a bolt, the outer sealing ring 307 is positioned in a groove of the outer ring spacer ring 308, and the outer ring spacer ring 308 is connected with the frame 400 and limited through the outer ring gland 306; outer lane grease pipe 309 is installed the inboard of frame 400, inner circle gland 310 with supporting seat 304 bolted connection, interior sealing washer 312 is located in the recess of inner circle spacer ring 313 and all with supporting seat 304 contact is connected and is passed through inner circle gland 310 is spacing, interior seal cover 311 with frame 400 passes through bolted connection, inner circle grease pipe 314 is installed at frame 400 inboard.
Specifically, the drive reducer 301 of the bucket-wheel drive device 300 is connected to the frame 400, and the frame 400 serves as a support structure of the entire bucket-wheel structure including the bucket 100 and the bucket mounting ring 200; when the scraper bucket 100 works, the speed reduction motor 301 is driven to start, the pinion 302 drives the outer gear ring of the gear bearing 303 to move, and the outer gear ring drives the connecting seat 201 to rotate through the supporting seat 304 so as to realize the rotation of the scraper bucket 100; the outer sealing ring 307 and the outer sealing sleeve 305 rotate in a friction mode, and the outer surface of the outer sealing sleeve 305 is subjected to heat treatment, so that the wear resistance is good; the inner sealing ring 312 and the inner sealing sleeve 311 rotate in a friction mode, the outer surface of the inner sealing sleeve 311 is subjected to heat treatment, the wear resistance is good, and the service life of the bucket wheel mechanism is effectively prolonged.
Drive gear motor 301 adopts trinity gear motor, gear motor specifically adopts variable frequency brake motor, every set bucket wheel drive arrangement 300 contains four drive gear motor 301 and evenly arranges, and this kind of motor safety redundancy height operates steadily, easily changes, has reduced the maintenance volume, improves the reliability of long-time, continuity work. The gear bearing 303 is designed as a three-row cylindrical roller bearing, and the outer ring of the cylindrical roller bearing is a large gear ring.
The fixed end of the outer ring grease pipe 309 is communicated with a through hole on the outer ring spacer ring 308, and lubricating grease 315 is filled between the outer sealing sleeve 305 and the outer sealing ring 307 through the outer ring grease pipe 309; the fixed end of the inner ring grease pipe 314 is communicated with a through hole in the frame 400, the through hole in the frame 400 and the axis of the through hole in the inner ring spacer ring 313 are on the same straight line, and lubricating grease 315 is filled between the inner sealing sleeve 311 and the inner sealing ring 312 through the inner ring grease pipe 314. The grease 315 is injected to mainly perform sealing and cooling functions.
A reclaimer, include as above the novel bucket wheel mechanism for bucket wheel reclaimer, install this bucket wheel mechanism on the reclaimer, when getting the material, get the material by walking trolley 500 of horizontal operation and rotatory scraper bowl 100 on it in succession, the material transfers to the crane span structure belt conveyor through receiving hopper 202 on, transfer to the stock ground belt conveyor at last and transport away, through the lift of crane span structure and the operation of portal, can get the material heap out. The reclaimer has stable operation, good working stability, long service life and convenient disassembly and maintenance.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (6)
1. The utility model provides a novel bucket wheel mechanism for bucket wheel reclaimer which characterized in that: the bucket type material taking machine comprises a bucket (100), a bucket mounting ring (200), a bucket wheel driving device (300), a frame (400), a walking trolley (500), a trolley driving device (600), a horizontal guide wheel (700) and a blocking wheel (800), wherein the walking trolley (500), the horizontal guide wheel (700) and the blocking wheel (800) are respectively in contact with a movable beam (900) of the material taking machine;
a plurality of buckets (100) are connected to the outer edge of the bucket mounting ring (200) and are uniformly arranged; the bucket mounting ring (200) is connected with the bucket wheel driving device (300), and the bucket wheel driving device (300) is mounted on the frame (400); the bucket mounting ring (200) is provided with a connecting seat (201) and a receiving hopper (202), the connecting seat (201) is integrally designed into a circular ring shape, the bucket mounting ring (200) is connected with the bucket wheel driving device (300) through the connecting seat (201), the receiving hopper (202) is mounted at the inner side of the top of the connecting seat (201), and the outlet end of the receiving hopper (202) is positioned above the conveying belt;
the traveling trolley (500) is connected with the frame (400) through a hinge shaft (501), the trolley driving device (600) is installed inside the frame (400), the gear rack mechanism (601) is installed on the side face of the movable beam, and the trolley driving device (600) drives the traveling trolley (500) to horizontally and linearly move along the hinge shaft (501) through the gear rack mechanism (601);
the horizontal guide wheel (700) is connected to the side face of the frame (400), and the top end arc face of the horizontal guide wheel (700) is connected with the side face of the movable beam of the reclaimer and moves along the side face;
the catch wheel (800) is connected below the frame (400), and the top arc surface of the catch wheel (800) is in contact with the bottom side rail of the movable beam of the reclaimer and moves along the rail;
the bucket wheel driving devices (300) are provided with two sets, and the two sets of bucket wheel driving devices (300) are positioned on two sides of the bucket (100) and are symmetrically arranged; the bucket wheel driving device (300) comprises a driving speed reduction motor (301), a pinion (302), a gear bearing (303), a supporting seat (304), an outer sealing sleeve (305), an outer ring gland (306), an outer sealing ring (307), an outer ring spacer ring (308), an outer ring grease pipe (309), an inner ring gland (310), an inner sealing sleeve (311), an inner sealing ring (312), an inner ring spacer ring (313) and an inner ring grease pipe (314), the driving speed reducing motor (301) is arranged on the frame (400), the pinion (302) is arranged at the end head of the working end of the driving speed reducing motor (301), the pinion (302) is meshed with an outer gear ring of the gear bearing (303), the inner ring of the gear bearing (303) is fixedly connected with a bearing seat (401) arranged on the frame (400), and the outer ring of the gear bearing (303) is connected with the inner side of the supporting seat (304); the outer sealing sleeve (305) is connected with the supporting seat (304) through a bolt, the outer ring gland (306) is connected with the frame (400) through a bolt, the outer sealing ring (307) is located in a groove of the outer ring spacer ring (308), and the outer ring spacer ring (308) is connected with the frame (400) and limited through the outer ring gland (306); outer lane grease pipe (309) is installed the inboard of frame (400), inner circle gland (310) with supporting seat (304) bolted connection, interior sealing washer (312) are located in the recess of inner circle spacer ring (313) and all with supporting seat (304) contact is connected and is passed through inner circle gland (310) are spacing, interior seal cover (311) with frame (400) are through bolted connection, install at frame (400) inboard inner circle grease pipe (314).
2. The novel bucket wheel mechanism for the bucket-wheel reclaimer of claim 1, wherein: drive gear motor (301) adopt trinity gear motor, gear motor specifically adopts variable frequency brake motor, every the bucket wheel drive arrangement (300) contain four drive gear motor (301) and evenly arrange.
3. The novel bucket wheel mechanism for the bucket-wheel reclaimer of claim 1, wherein: the gear bearing (303) is designed into a three-row cylindrical roller bearing, and the outer ring of the cylindrical roller bearing is a large gear ring.
4. The novel bucket wheel mechanism for the bucket-wheel reclaimer of claim 1, wherein: the fixed end of the outer ring grease pipe (309) is communicated with a through hole in the outer ring spacer ring (308), and lubricating grease (315) is filled between the outer sealing sleeve (305) and the outer sealing ring (307) through the outer ring grease pipe (309); the fixed end of the inner ring grease pipe (314) is communicated with a through hole in the frame (400), the through hole in the frame (400) and the axis of the through hole in the inner ring spacer ring (313) are on the same straight line, and lubricating grease (315) is filled between the inner sealing sleeve (311) and the inner sealing ring (312) through the inner ring grease pipe (314).
5. The novel bucket wheel mechanism for the bucket-wheel reclaimer of claim 1, wherein: the connecting seat (201) is connected to the supporting seat (304) through a bolt assembly.
6. The utility model provides a reclaimer which characterized in that: the bucket wheel mechanism for the novel bucket-wheel material taking machine comprises the bucket wheel mechanism as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810354673.5A CN108545492B (en) | 2018-04-19 | 2018-04-19 | Novel bucket wheel mechanism for bucket wheel material taking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810354673.5A CN108545492B (en) | 2018-04-19 | 2018-04-19 | Novel bucket wheel mechanism for bucket wheel material taking machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108545492A CN108545492A (en) | 2018-09-18 |
| CN108545492B true CN108545492B (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810354673.5A Active CN108545492B (en) | 2018-04-19 | 2018-04-19 | Novel bucket wheel mechanism for bucket wheel material taking machine |
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| Country | Link |
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| CN (1) | CN108545492B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3069027A (en) * | 1958-05-01 | 1962-12-18 | Hewitt Robbins Inc | Reclaiming method and apparatus |
| SU563113A3 (en) * | 1973-04-16 | 1977-06-25 | Гирлинг Лимитед (Фирма) | Brake system of the vehicle |
| IN147400B (en) * | 1975-07-03 | 1980-02-16 | Litton Systems Inc | |
| NO154688C (en) * | 1983-10-26 | 1986-12-03 | Kaare Haahjem | BULKGODS CLEANING DEVICE. |
| KR100993992B1 (en) * | 2003-11-06 | 2010-11-11 | 주식회사 포스코 | Apparatus for turning and supporting wheel buckets of blending reclaimer |
| CN204211160U (en) * | 2014-09-05 | 2015-03-18 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of hanging arm type bucket wheel stacker-reclaimer with cantilever retractable |
| CN205616278U (en) * | 2016-05-05 | 2016-10-05 | 襄阳忠良工程机械有限责任公司 | Move belt loader with platform truck that slides |
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2018
- 2018-04-19 CN CN201810354673.5A patent/CN108545492B/en active Active
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