CN205346029U - Commodity circulation becomes rail transportation power and free conveyor - Google Patents

Commodity circulation becomes rail transportation power and free conveyor Download PDF

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Publication number
CN205346029U
CN205346029U CN201520993652.XU CN201520993652U CN205346029U CN 205346029 U CN205346029 U CN 205346029U CN 201520993652 U CN201520993652 U CN 201520993652U CN 205346029 U CN205346029 U CN 205346029U
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China
Prior art keywords
chain
quick
conveyer
track
slow speed
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Withdrawn - After Issue
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CN201520993652.XU
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Chinese (zh)
Inventor
王永辉
蓝家健
孟亮亮
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Maanshan Xiangyu Machinery Automation Science & Technology Co Ltd
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Maanshan Xiangyu Machinery Automation Science & Technology Co Ltd
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Abstract

The utility model discloses a commodity circulation becomes rail transportation power and free conveyor, the conveyer includes quick chain frame, overhead conveyor and chain frame and control system at a slow speed, install quick chain tractive track in the quick chain frame, quick chain tractive track below is provided with the sprocket device, it bears the track to install quick chain below the sprocket device, install the drive wheel on the quick chain tractive track, install the traction lever on the drive wheel, the traction lever lower extreme is connected with the guide block of installing on the sprocket device, the sprocket drive system is installed at sprocket device both ends, be provided with the tight system in load feedback top in the sprocket drive system. The utility model has the advantages that: the travelling bogie of conveyer adopts lift claw structure, when long -pending putting, changes the kinetic energy of dolly into potential energy, and potential energy conversion one -tenth kinetic energy when starting for the dolly is for the traversing energy saving.

Description

Logistics becomes rail transport Stacking Type Hang Conveyer
Technical field
The present invention relates to a kind of overhead chain conveyer, in particular, relate to a kind of logistics and become rail transport Stacking Type Hang Conveyer.
Background technology
Overhead chain conveyer is the equipment of the continuative transport with airtight space circuit, it can be implemented in descending spatially and turning, there is layout type personal flexibly, the advantage that floor space is little, is therefore widely used in the high-volume streamline production operation in the industries such as machinery, automobile, electronics, household electrical appliance, light industry, food and chemical industry.
At present, common overhead chain conveyer is in use primarily present following several respects problem:
Common overhead chain conveyer adopts the rate signal of chain, it is impossible to the true velocity of actual response chain, causes being transferred workpiece and process asynchronous with workpiece, and particularly production line automation degree is high, and the environment that productive temp is fast, problem has more prominent;
The mechanical tensioning device that the overhead chain conveyer chain strip adoption of prior art is traditional, loosening in use easily occurs in traditional mechanical tensioning device, cause that error occurs in transmission process in sprocket wheel, substantially increase the maintenance cost in later stage, affect production efficiency.
The travelling bogie of the overhead chain conveyer that tradition is common adopts the dolly of integral type, and the problem stagnated easily occurs when track turn in the dolly of integral type, causes that error occurs in suspension conveying system.
Additionally, the travelling bogie of traditional common overhead chain conveyer does not have kinetic energy to store when accumulating, easily there is screens problem when changing Lane in free parking car.
For the problems referred to above, through retrieval, Chinese Patent Application No. 201420543154.0, the applying date is JIUYUE in 2014 19, invention and created name is: a kind of piling suspension conveying equipment, the dolly of the bearing track motion of this application case, the bias being rotatably connected under deadweight state on dolly to coordinate with described push rod deadweight lifting claw, the direction of motion along described chain is horizontally disposed with and is followed successively by rear dolly, front dolly;Hang a front dolly on same suspender and after one dolly be one group, the side of a dolly in least one set is provided with a lifting claw.This application case use principle is: chain is driven by driving device and runs always, the engagement of cutting somebody's hair that the lifting claw of dolly freely lifts when bias is conducted oneself with dignity with conduction chain is moved with chain, when some workpiece runs to the position needing operation, operator operates autostop and is lifted by lifting claw and blocked by dolly.So the effect that the effect of this application case lifting claw only makes braking cannot be accomplished, the kinetic energy of dolly being changed into potential energy, when dolly starts, potential energy changes into kinetic energy, saves the purpose of the energy for trolley travelling.
Chinese Patent Application No. CN200720040917.X, invention and created name is: a kind of sling lifting claw uplifting device for free parking suspension transporter;This application case provide a kind of lifting claw 1 and force plate 5 with the use of, when before suspender, dolly passes through, it is obstructed once occur that suspender front shovel 6 declines, sling lifting claw 1 could not be driven to rise 2 synchronization risings of cutting somebody's hair with stretched wire, this may result in sling lifting claw 1, stretched wire is cut somebody's hair the unhook between 2, and after adding and forcing plate 5, lifting claw all can under the effect of this pressure plate 5, and stretched wire 2 basic synchronization of cutting somebody's hair rise and ensure to change the definitely reliable of chain.Lifting claw 1 effect in this application case is to ensure that cuts somebody's hair 2 synchronizations with stretched wire, it is ensured that change the absolute reliability of chain.The lifting claw 1 of this application case cannot accomplish to save for trolley travelling the purpose of the energy equally.
Summary of the invention
The present invention is directed to the deficiency of existing product, and provide a kind of a kind of logistics rational in infrastructure, practical, safe and reliable, attenuating maintenance cost, raising production efficiency to become rail transport Stacking Type Hang Conveyer.
The logistics of the present invention becomes rail transport Stacking Type Hang Conveyer, and described conveyer includes quick chain frame, overhead chain conveyer and chain frame and control system at a slow speed;In described quick chain frame, quick chain haulage track is installed, described quick chain haulage track is arranged below chain gear apparatus, described chain gear apparatus is installed below quick chain bearing track, described quick chain haulage track is provided with driving wheel, described driving wheel is provided with draw bar, described draw bar lower end and the guide pad being arranged on chain gear apparatus connect, described chain gear apparatus two ends are provided with chain wheel drive system, it is provided with load feedback pre-tightening system in described chain wheel drive system, described load feedback pre-tightening system includes driving wheel, mounting seat, top pressure spring, adjust seat, drive axle and pressure feedback sensor, the chain interoperation of described driving wheel and chain gear apparatus connects, described driving wheel is installed on the driving shaft, in described driving axle, pressure feedback sensor is installed, described driving axle is arranged on the front end of hydraulic cylinder, the cylinder body of described hydraulic cylinder is provided with mounting seat, described mounting seat and the fixing connection of quick chain frame, the rear end of described hydraulic cylinder is provided with top pressure spring, described top pressure spring is arranged on spring base and adjusts between seat, described adjustment seat and the fixing connection of quick chain frame, described pressure feedback sensor is connected by holding wire and hydraulic system, the extended length of described HYDRAULIC CONTROL SYSTEM hydraulic cylinder;Described guide pad and overhead chain conveyer are connected, and described overhead chain conveyer includes travelling bogie, lifting claw, slide cover, transport wheel, front shovel, rotation axle;Described travelling bogie upper end is provided with transport wheel, and described transport wheel is arranged on quick chain bearing track, and the front end of described travelling bogie is provided with slide cover, is provided with lifting claw, described lifting claw lower end and front shovel hinged by rotating axle in described slide cover;The rear end of described travelling bogie is provided with guiding groove;Described guiding groove and front shovel cooperation are slidably connected;Described quick chain frame side is provided with chain frame at a slow speed, in the described frame of chain at a slow speed, chain haulage track and at a slow speed chain bearing track at a slow speed are installed, the described bearing track of chain at a slow speed and quick chain bearing track communicate, the described bearing track of chain at a slow speed and quick chain bearing track junction are provided with change rail guiding, and described change rail guiding includes transfer orbital control system, becomes rail motor, becomes rail mounting seat, connects approach rail road;The described approach rail road that connects is fixedly mounted in change rail mounting seat, and the rotating shaft of described change rail mounting seat and change rail motor connects, and described change rail motor is connected by wire and transfer orbital control system, and described change rail mounting seat is provided with angular sensor.
Further, described slide cover and lifting claw are matched in clearance.
Further, described transport wheel outer surface is provided with lubricating layer, and described lubricating layer is graphite alloy granule.
Further, described quick chain haulage track and at a slow speed chain haulage track be each independent round circular orbit
Further, described travelling bogie rear end be arranged over driving handle, described driving handle and guide pad are connected.
Further, described travelling bogie is for assembling splicing, and travelling bogie includes leading portion dolly and back segment dolly, and the front end of described back segment dolly is provided with connection bump, the rear end of described leading portion dolly is provided with connecting groove, and described connecting groove and connection bump are connected by rotating pin.
Further, described driving axle being provided with speed encoder, described speed encoder is by holding wire and controls system connection.
Further, the rotating shaft of described transport wheel being provided with load cell, described load cell is connected by holding wire and control system.
Further, described quick chain frame and at a slow speed chain frame being provided with stress induction sheet, described stress induction sheet is by holding wire and controls system connection.
The present invention provides the benefit that compared with existing known technology:
1, the travelling bogie of conveyer adopts lifting claw structure, when accumulating, the kinetic energy of dolly is changed into potential energy, and when starting for dolly, potential energy changes into kinetic energy, saves the energy for trolley travelling;
2, the transport wheel outer surface of dolly is provided with the lubricating layer of graphite alloy granule, is that dolly keeps lubricating status in running, reduces the friction between dolly and track, reduce energy loss, improve the service life of dolly;
3, it is arranged over driving handle in travelling bogie rear end, driving handle and guide pad are connected, losing efficacy at lifting claw makes offer second heavily ensure, it is ensured that with the cooperation of guide pad in dolly transportation, it is prevented that occur that sprocket wheel cannot with the generation of travelling bogie mated condition;
4, chain gear apparatus adopts load feedback pre-tightening system, and load feedback pre-tightening system adopts pressure feedback sensor to make sprocket wheel moment in running keep tensioning state, it is ensured that the accurate performance that sprocket wheel runs;
5, travelling bogie adopts and assembles spliced connection, makes travelling bogie when turning, and changes the angle that the angular compliance of vehicle body is turned, it is ensured that dolly does not have, when turning, the situation that off normal can be stuck;Spliced connection according to increasing intermediate transition section in dolly use procedure, can also lengthen dolly length or shorten dolly length, applying flexible, novel structure;
6, at quick chain frame and mount stress sensing chip in chain frame at a slow speed;Whether stress induction sheet moment monitoring transport frame deforms, it is ensured that use safety;
7, being provided with load cell in the rotating shaft of transport wheel, load cell can ensure that travelling bogie will not overload, if it occur that overloaded load sensor sends a signal to control system, control system sends alarm signal, it is ensured that uses safety.
8, speed encoder is installed on the driving shaft, can the acquisition system speed of service, the true velocity of actual response chain accurately, make to be transferred workpiece Tong Bu with transport processing, be particularly suitable for applications in production line automation degree high, the environment that productive temp is fast;
9, become rail guiding and can realize the transport of multi-track integrating control, meet the requirement of speed track difference logistics transportation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the left view of the present invention.
Fig. 3 is the structural representation hanging conveyer of the present invention.
Fig. 4 is the structural representation of the load feedback pre-tightening system of the present invention.
Fig. 5 is the structural representation becoming rail guiding of the present invention.
In figure: quickly chain frame 1, chain gear apparatus 2, driving wheel 2-1, mounting seat 2-2, top pressure spring 2-3, adjust seat 2-4, drive axle 2-5, pressure feedback sensor 2-6, hydraulic cylinder 2-7, spring base 2-8, overhead chain conveyer 3, travelling bogie 3-1, lifting claw 3-2, slide cover 3-3, transport wheel 3-4, front shovel 3-5, rotate axle 3-6, prop up support component 4, quick chain haulage track 5, quick chain bearing track 6, chain frame 7 at a slow speed, chain haulage track 8 at a slow speed, chain bearing track 9 at a slow speed, become rail guiding 10.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
In the drawings, a kind of logistics of the present invention becomes rail transport Stacking Type Hang Conveyer mainly by quick chain frame 1, chain gear apparatus 2, driving wheel 2-1, mounting seat 2-2, top pressure spring 2-3, adjust seat 2-4, drive axle 2-5, pressure feedback sensor 2-6, hydraulic cylinder 2-7, spring base 2-8, overhead chain conveyer 3, travelling bogie 3-1, lifting claw 3-2, slide cover 3-3, transport wheel 3-4, front shovel 3-5, rotate axle 3-6, prop up support component 4, quick chain haulage track 5, quick chain bearing track 6, chain frame 7 at a slow speed, chain haulage track 8 at a slow speed, chain bearing track 9 at a slow speed, become rail guiding 10 composition.
As shown in the figure;A kind of logistics becomes rail transport Stacking Type Hang Conveyer, and described conveyer includes quick chain frame 1, overhead chain conveyer 3 and chain frame 7 and control system at a slow speed;In described quick chain frame 1, quick chain haulage track 5 is installed, described quick chain haulage track 5 is arranged below chain gear apparatus 2, described chain gear apparatus 2 is installed below quick chain bearing track 6, described quick chain haulage track 5 is provided with driving wheel, described driving wheel is provided with draw bar, described draw bar lower end and the guide pad being arranged on chain gear apparatus 2 connect, described chain gear apparatus 2 two ends are provided with chain wheel drive system, it is provided with load feedback pre-tightening system in described chain wheel drive system, described load feedback pre-tightening system includes driving wheel 2-1, mounting seat 2-2, top pressure spring 2-3, adjust seat 2-4, drive axle 2-5 and pressure feedback sensor 2-6, the chain interoperation of described driving wheel 2-1 and chain gear apparatus 2 connects, described driving wheel 2-1 is arranged on driving axle 2-5, in described driving axle 2-5, pressure feedback sensor 2-6 is installed, described driving axle 2-5 is arranged on the front end of hydraulic cylinder 2-7, the cylinder body of described hydraulic cylinder 2-7 is provided with mounting seat 2-2, described mounting seat 2-2 and the fixing connection of quick chain frame 1, the rear end of described hydraulic cylinder 2-7 is provided with top pressure spring 2-3, described top pressure spring 2-3 is arranged on spring base 2-8 and adjusts between seat 2-4, described adjustment seat 2-4 and the fixing connection of quick chain frame 1, described pressure feedback sensor 2-6 is connected by holding wire and hydraulic system, the extended length of described HYDRAULIC CONTROL SYSTEM hydraulic cylinder 2-7;Described guide pad and overhead chain conveyer 3 are connected, and described overhead chain conveyer 3 includes travelling bogie 3-1, lifting claw 3-2, slide cover 3-3, transport wheel 3-4, front shovel 3-5, rotates axle 3-6;Described travelling bogie 3-1 upper end is provided with transport wheel 3-4, described transport wheel 3-4 is arranged on quick chain bearing track 6, the front end of described travelling bogie 3-1 is provided with slide cover 3-3, lifting claw 3-2, described lifting claw 3-2 lower end and front shovel 3-5 are installed hinged by rotating axle 3-6 in described slide cover 3-3;The rear end of described travelling bogie 3-1 is provided with guiding groove;Described guiding groove and front shovel 3-5 cooperation are slidably connected;Described quick chain frame 1 side is provided with chain frame 7 at a slow speed, is provided with chain haulage track 8 and at a slow speed chain bearing track 9 at a slow speed in the described frame of chain at a slow speed 7, and the described bearing track of chain at a slow speed 9 and quick chain bearing track 6 communicate.The described bearing track of chain at a slow speed 9 and quick chain bearing track 6 junction are provided with change rail guiding 10, and described change rail guiding 10 includes transfer orbital control system, becomes rail motor, becomes rail mounting seat, connects approach rail road;The described approach rail road that connects is fixedly mounted in change rail mounting seat, and the rotating shaft of described change rail mounting seat and change rail motor connects, and described change rail motor is connected by wire and transfer orbital control system, and described change rail mounting seat is provided with angular sensor.Described slide cover 3-3 and lifting claw 3-2 is matched in clearance.The travelling bogie of conveyer adopts lifting claw 3-2 structure, when dolly accumulates, the kinetic energy of dolly is changed into potential energy, and when starting for dolly, potential energy changes into kinetic energy, saves the energy for trolley travelling.
Described transport wheel 3-4 outer surface is provided with lubricating layer, and described lubricating layer is graphite alloy granule.The transport wheel 3-4 outer surface of dolly is provided with the lubricating layer of graphite alloy granule, is that dolly keeps lubricating status in running, reduces the friction between dolly and track, reduce energy loss, improve the service life of dolly;
Described quick chain haulage track 5 and at a slow speed chain haulage track 8 are each independent round circular orbit;
The rear end of described travelling bogie 3-1 is arranged over driving handle, described driving handle and guide pad are connected, losing efficacy at lifting claw makes offer second heavily ensure, it is ensured that with the cooperation of guide pad in dolly transportation, it is prevented that occur that sprocket wheel cannot with the generation of travelling bogie mated condition;
Described travelling bogie 3-1 is for assembling splicing, travelling bogie 3-1 includes leading portion dolly and back segment dolly, the front end of described back segment dolly is provided with connection bump, and the rear end of described leading portion dolly is provided with connecting groove, and described connecting groove and connection bump are connected by rotating pin.Travelling bogie 3-1 adopts and assembles spliced connection, makes travelling bogie when turning, and changes the angle that the angular compliance of vehicle body is turned, it is ensured that dolly does not have, when turning, the situation that off normal can be stuck;Spliced connection according to increasing intermediate transition section in dolly use procedure, can also lengthen dolly length or shorten dolly length, applying flexible.
Being provided with speed encoder on described driving axle 2-5, described speed encoder is by holding wire and controls system connection.Speed encoder is installed on the driving shaft, can the acquisition system speed of service, the true velocity of actual response chain accurately, make to be transferred workpiece Tong Bu with transport processing, be particularly suitable for applications in production line automation degree high, the environment that productive temp is fast.
Being provided with load cell in the rotating shaft of described transport wheel 3-4, described load cell is connected by holding wire and control system.Being provided with load cell in the rotating shaft of transport wheel, load cell can ensure that travelling bogie will not overload, if it occur that overloaded load sensor sends a signal to control system, control system sends alarm signal, it is ensured that uses safety.
Being provided with stress induction sheet in described quick chain frame 1 and at a slow speed chain frame 7, described stress induction sheet is by holding wire and controls system connection.At quick chain frame and mount stress sensing chip in chain frame at a slow speed;Whether stress induction sheet moment monitoring transport frame deforms, it is ensured that use safety;
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.

Claims (9)

1. logistics become rail transport a Stacking Type Hang Conveyer, it is characterized in that, described conveyer include quick chain frame (1), overhead chain conveyer (3) and at a slow speed chain frame (7) and control system;In described quick chain frame (1), quick chain haulage track (5) is installed, described quick chain haulage track (5) is arranged below chain gear apparatus (2), described chain gear apparatus (2) is installed below quick chain bearing track (6), described quick chain haulage track (5) is provided with driving wheel, described driving wheel is provided with draw bar, described draw bar lower end and the guide pad being arranged on chain gear apparatus (2) connect, described chain gear apparatus (2) two ends are provided with chain wheel drive system, it is provided with load feedback pre-tightening system in described chain wheel drive system, described load feedback pre-tightening system includes driving wheel (2-1), mounting seat (2-2), top pressure spring (2-3), adjust seat (2-4), drive axle (2-5) and pressure feedback sensor (2-6), the chain interoperation of described driving wheel (2-1) and chain gear apparatus (2) connects, described driving wheel (2-1) is arranged in driving axle (2-5), in described driving axle (2-5), pressure feedback sensor (2-6) is installed, described driving axle (2-5) is arranged on the front end of hydraulic cylinder (2-7), the cylinder body of described hydraulic cylinder (2-7) is provided with mounting seat (2-2), described mounting seat (2-2) and the fixing connection of quick chain frame (1), the rear end of described hydraulic cylinder (2-7) is provided with top pressure spring (2-3), described top pressure spring (2-3) is arranged on spring base (2-8) and adjusts between seat (2-4), described adjustment seat (2-4) and the fixing connection of quick chain frame (1), described pressure feedback sensor (2-6) is connected by holding wire and hydraulic system, the extended length of described HYDRAULIC CONTROL SYSTEM hydraulic cylinder (2-7);Described guide pad and overhead chain conveyer (3) are connected, and described overhead chain conveyer (3) includes travelling bogie (3-1), lifting claw (3-2), slide cover (3-3), transport wheel (3-4), front shovel (3-5), rotates axle (3-6);Described travelling bogie (3-1) upper end is provided with transport wheel (3-4), described transport wheel (3-4) is arranged on quick chain bearing track (6), the front end of described travelling bogie (3-1) is provided with slide cover (3-3), lifting claw (3-2), described lifting claw (3-2) lower end and front shovel (3-5) are installed hinged by rotating axle (3-6) in described slide cover (3-3);The rear end of described travelling bogie (3-1) is provided with guiding groove;Described guiding groove and front shovel (3-5) cooperation are slidably connected;Described quick chain frame (1) side is provided with chain frame (7) at a slow speed, in the described frame of chain at a slow speed (7), chain haulage track (8) and at a slow speed chain bearing track (9) at a slow speed are installed, the described bearing track of chain at a slow speed (9) and quick chain bearing track (6) communicate, the described bearing track of chain at a slow speed (9) and quick chain bearing track (6) junction are provided with change rail guiding (10), and described change rail guiding (10) includes transfer orbital control system, becomes rail motor, becomes rail mounting seat, connects approach rail road;The described approach rail road that connects is fixedly mounted in change rail mounting seat, and the rotating shaft of described change rail mounting seat and change rail motor connects, and described change rail motor is connected by wire and transfer orbital control system, and described change rail mounting seat is provided with angular sensor.
2. logistics according to claim 1 becomes rail transport Stacking Type Hang Conveyer, it is characterized in that, described slide cover (3-3) and lifting claw (3-2) are matched in clearance.
3. logistics according to claim 1 becomes rail transport Stacking Type Hang Conveyer, it is characterized in that, described transport wheel (3-4) outer surface is provided with lubricating layer, and described lubricating layer is graphite alloy granule.
4. logistics according to claim 1 becomes rail transport Stacking Type Hang Conveyer, it is characterized in that, described quick chain haulage track (5) and at a slow speed chain haulage track (8) are each independent round circular orbit.
5. logistics according to claim 1 become rail transport Stacking Type Hang Conveyer, it is characterized in that, described travelling bogie (3-1) rear end be arranged over driving handle, described driving handle and guide pad are connected.
6. logistics according to claim 1 becomes rail transport Stacking Type Hang Conveyer, it is characterized in that, described travelling bogie (3-1) is for assembling splicing, travelling bogie (3-1) includes leading portion dolly and back segment dolly, the front end of described back segment dolly is provided with connection bump, the rear end of described leading portion dolly is provided with connecting groove, and described connecting groove and connection bump are connected by rotating pin.
7. logistics according to claim 1 becomes rail transport Stacking Type Hang Conveyer, it is characterized in that, described driving axle (2-5) is provided with speed encoder, and described speed encoder is connected by holding wire and control system.
8. logistics according to claim 1 becomes rail transport Stacking Type Hang Conveyer, it is characterized in that, the described rotating shaft transporting wheel (3-4) is provided with load cell, and described load cell is by holding wire and controls system connection.
9. logistics according to claim 1 becomes rail transport Stacking Type Hang Conveyer, it is characterized in that, described quick chain frame (1) and at a slow speed chain frame (7) are provided with stress induction sheet, and described stress induction sheet is connected by holding wire and control system.
CN201520993652.XU 2015-12-05 2015-12-05 Commodity circulation becomes rail transportation power and free conveyor Withdrawn - After Issue CN205346029U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105366277A (en) * 2015-12-09 2016-03-02 马鞍山市翔宇机械自动化科技有限公司 Transportation device of power and free suspension conveyor
CN105383861A (en) * 2015-12-05 2016-03-09 马鞍山市翔宇机械自动化科技有限公司 Power and free trolley conveyor for material flow orbital transferring transportation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105383861A (en) * 2015-12-05 2016-03-09 马鞍山市翔宇机械自动化科技有限公司 Power and free trolley conveyor for material flow orbital transferring transportation
CN105366277A (en) * 2015-12-09 2016-03-02 马鞍山市翔宇机械自动化科技有限公司 Transportation device of power and free suspension conveyor

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