CN105544717B - A kind of vertical shaft draws digging car - Google Patents

A kind of vertical shaft draws digging car Download PDF

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Publication number
CN105544717B
CN105544717B CN201610018704.0A CN201610018704A CN105544717B CN 105544717 B CN105544717 B CN 105544717B CN 201610018704 A CN201610018704 A CN 201610018704A CN 105544717 B CN105544717 B CN 105544717B
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China
Prior art keywords
arm
grab bucket
vertical shaft
forearm
oil cylinder
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CN201610018704.0A
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CN105544717A (en
Inventor
邬昭平
甘俊
李游
陈明
吴雪华
苏竹新
王小龙
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Changsha Zhi Xuntong Environmental Protection Technology Co Ltd
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Changsha Zhi Xuntong Environmental Protection Technology Co Ltd
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Priority to CN201610018704.0A priority Critical patent/CN105544717B/en
Publication of CN105544717A publication Critical patent/CN105544717A/en
Application granted granted Critical
Publication of CN105544717B publication Critical patent/CN105544717B/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F7/00Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/10Wheeled apparatus for emptying sewers or cesspools
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F7/00Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/10Wheeled apparatus for emptying sewers or cesspools
    • E03F7/106Accessories, e.g. hose support

Abstract

Digging car is drawn the invention discloses a kind of vertical shaft, it includes chassis portion and upper dress part, chassis portion includes power and cooling system, underframe and leg system;Upper dress part include flexible arm assembly, jib lubbing mechanism, can bending grab bucket mechanism, high-pressure sprayer, hydraulic pressure and electric control system;It will can not only be caught along the thing that silts up in the range of the certain radius of turn of vertical shaft vertical direction to outside well, and can by it is vertical with vertical shaft and communicate, close to treat a range of underground pipe network of desilting vertical shaft silt up thing crawl dredging, realize to 360 ° of comprehensive desiltings without dead angle of vertical shaft;It can draw digging car body institute band high-pressure sprayer by being integrated in after by the preliminary dredging vertical shaft of grab bucket and sprayed water with high pressure, to reach the purpose to the thorough dredging of drainage pipeline networks simultaneously.

Description

A kind of vertical shaft draws digging car
Technical field
The invention belongs to shaft dredging equipment technical field, and in particular to a kind of vertical shaft draws digging car.
Background technology
At present, urban discharging pipeline inspection shaft often deposits, and at this moment just needs to use vertical shaft and draws digging car and carries out vertical shaft Desilting.Existing vertical shaft draws digging car by automobile chassis, power and cooling system, underframe and leg system, hydraulic pressure and electrical control system System, jib lubbing mechanism, flexible arm assembly, grab bucket mechanism composition.Using the automobile chassis for possessing voluntarily maneuverability, car is opened to treating Near desilting vertical shaft, supporting leg, subchassis Zhi Chong, operation control system, by the grab bucket mechanism edge being installed on telescopic arm are opened Vertical shaft is transferred vertically, is realized by the folding of grab bucket and is drawn digging dredging operation.
But vertical shaft is blocked, be frequently accompanied by it is vertical with vertical shaft and communicate, close treat that desilting vertical shaft is a range of The blocking of underground pipe network, existing vertical shaft draw dig car grab bucket can not with vertical shaft vertical direction is angled swings, and then can not The comprehensive desilting work without dead angle is carried out to vertical shaft.
Other vertical shaft is blocked, and the crawl only by silting thing up to blocking tends not to reach to the thorough dredging of drainage pipeline networks Purpose.
The content of the invention
For prior art problem, the present invention provides a kind of vertical shaft and draws digging car, can not only will be certain along vertical shaft vertical direction The thing that silts up in the range of radius of turn is caught to outside well, and can by it is vertical with vertical shaft and communicate, close to treating desilting vertical shaft A range of underground pipe network silts thing crawl dredging up, realizes to 360 ° of comprehensive desiltings without dead angle of vertical shaft;Simultaneously can After by the preliminary dredging vertical shaft of grab bucket, draw digging car body institute band high-pressure sprayer by being integrated in and sprayed water with high pressure, with Reach the purpose to the thorough dredging of drainage pipeline networks.
Technical scheme is as follows:A kind of vertical shaft draws digging car, and it includes chassis portion and upper dress part, chassis portion Including power and cooling system, underframe and leg system;Upper dress part include flexible arm assembly, jib lubbing mechanism, can bending grab bucket Mechanism, high-pressure sprayer, hydraulic pressure and electric control system;
The automobile chassis is a standard chassis, possesses self maneuverability, meets China's road traffic laws and regulationses to this institute Make every relevant regulations.
The power and cooling system are by Diesel engine, radiator, hydraulic pressure pump group into hydraulic pump is from engine torque extraction Each executive item of hydraulic system provides pressure oil.
The underframe and leg system include underframe, forward and backward supporting leg, and forward and backward supporting leg is fixed on underframe, and underframe band is each Connection installing plate is planted, is coupled by bolt with each part and automobile chassis crossbeam.
The hydraulic pressure and electric control system are by hydraulic valve bank, joystick, hydraulic oil container, electric cabinet, sensing control member Part, connecting pipeline composition.
The jib lubbing mechanism is by large arm, forearm, large arm amplitude oil cylinder, forearm amplitude oil cylinder, telescopic arm hitch, turbine snail Bar drive pair is constituted.Large arm lower end is connected by bolts with turbine and worm drive pair, and large arm upper end passes through bearing pin with forearm lower end It is hinged, forearm upper end is hinged with telescopic arm hitch, telescopic arm hitch connection telescopic arm and forearm are small by what is be hinged therewith Arm amplitude oil cylinder piston rod is flexible to drive telescopic arm and the grab bucket mechanism being installed on it to realize luffing, and turbine and worm drive pair is another End installation is fixed on underframe, and turbine and worm drive pair, which is rotated, drives whole jib lubbing mechanism in underframe upper rotary, with to from vertical shaft Draw the working region progress operation for digging car different range.
The flexible arm assembly is using the heavy suit of four joint arms, the stretching structure of steel wire rope oiling cylinder;The grab bucket mechanism On telescopic arm.
The high-pressure sprayer includes water pump, water tank, connecting pipeline, water injector;
The water injector is a sprinkler with water pipe reel and fountain head.
The water pump uses import high-pressure plunger pump, by carrying water tank water intaking, can provide the water jet of height cumulative;
It is described can bending grab bucket mechanism include underground supporting arm mechanism, revolution driving component one, grab bucket oscillating arm mechanisms, return Turn drive component two, grab bucket;
The grab bucket is connected by the revolution driving component two with the grab bucket oscillating arm mechanisms, the grab bucket oscillating arm mechanisms It is connected by the revolution driving component one with the underground supporting arm mechanism;
The grab bucket oscillating arm mechanisms are made up of pedestal, swing arm, swing arm oil cylinder;Swing arm and pedestal, swing arm oil cylinder and pedestal, pendulum Arm oil cylinder is with swing arm by hinge, and flexible by swing arm cylinder piston rod just can realize 90 degree of swings of swing arm, swing arm Lower end separately carry hinge hole, coupled by bearing pin with revolution driving component two;
Further, the underground supporting arm mechanism includes support arm fixation forearm, support arm slip large arm, support bar group Part, support arm companding oil cylinder, it is a tubular construction part that support arm, which fixes forearm, is taken, lower shoe couples ear with various, thereon bottom Plate is drawn digging car telescopic arm lower shoe by bolt and vertical shaft and coupled, and lower shoe couples with revolution driving component one;Support arm is slided Large arm is also a tubular construction part, is set in support arm and fixes on forearm, take, second line of a couplet lug, ear and support arm are coupled thereon Companding oil cylinder rod head end is by hinge, and the ear that couples that second line of a couplet lug is fixed on forearm with support arm passes through hinge;Branch Strut component is made up of two hinge bars and borehole wall wedge, and two hinge bar one end are fixed forearm, support arm with support arm respectively and slided Large arm is hinged by hinge, the other end with borehole wall wedge, and during vertical shaft draws digging turner work, telescopic arm stretches, underground Supporting arm mechanism enters in vertical shaft, and support arm companding cylinder piston rod is retracted under pressure oil effect, drives support bar component to move Make, borehole wall wedge just can reliablely and stablely fit the borehole wall, further drawing digging for grab bucket provides rigid support.
Further, the revolution driving component one is a turbine and worm drive pair, and it couples underground supporting arm mechanism Support arm fixes forearm and the pedestal of grab bucket oscillating arm mechanisms.
Further, the grab bucket is made up of left and right grab bucket, grab bucket folding oil cylinder, grab bucket connecting rod, contiguous block, left and right Grab bucket, grab bucket connecting rod have two connection ears;Folding oil cylinder cylinder tube base band two of grabbing bucket couples ear, respectively with grab bucket connecting rod First line of a couplet lug is hinged by hinge, grab bucket connecting rod second line of a couplet lug with grab bucket;Left and right another connection ear of grab bucket and contiguous block It is hinged;Contiguous block is relatively fixed with grab bucket folding cylinder piston rod again to be coupled;So, grab bucket folding cylinder piston rod is flexible just can The folding of grab bucket, crawl is driven to silt thing up.
Further, revolution driving component two is a rotation motor, and the lower end output shaft of rotation motor passes through key and grab bucket The cylinder tube base connection of folding oil cylinder.
The present invention vertical shaft draw dig car can bending grab bucket mechanism in the course of the work, underground supporting arm mechanism support arm exhibition The piston rod of contracting oil cylinder is retracted under pressure oil effect, is driven the action of support bar component, borehole wall wedge is reliablely and stablely fitted On the borehole wall;Swing arm cylinder piston rod is retracted simultaneously, swing arm is may rotate to vertical shaft vertical direction into an angle of 90 degrees, then by returning Turn the rotation of drive component two, grab bucket folding cylinder piston rod to stretch, so that it may so that grab bucket this and vertical shaft are vertical and communicate, To silting thing crawl, dredging up in the certain limit for treating desilting vertical shaft, and then reach comprehensive, without dead angle to vertical shaft progress Desilting.The grab bucket mechanism is simple in construction, reliable, substantially increases vertical shaft and draws and digs the vertical shaft of car and draw digging scope and operating efficiency.
Silt thing up along vertical shaft crawl is various in grab bucket mechanism, after preliminary dredging vertical shaft, sprayed water with high pressure by water injector, can To realize the purpose to the thorough dredging of drainage pipeline networks.
Brief description of the drawings
Fig. 1 draws digging car overall structure diagram for the vertical shaft of the present invention;
Fig. 2 draws digging car grab bucket mechanism structural representation for the vertical shaft of the present invention;
Description of reference numerals:1. water tank;2. radiator;3. Diesel engine;4. hydraulic pump;5. hydraulic oil container;6. Water pump;7. water injector;8. turbine and worm drive pair;9. large arm;10. forearm;11. large arm amplitude oil cylinder;12. forearm Amplitude oil cylinder;13. telescopic arm hitch;14. flexible arm assembly;15. mechanism of grabbing bucket;16. forward and backward supporting leg;17. underframe; 18. electric cabinet;19. hydraulic valve bank;120. joystick;121. automobile chassis;21. support arm fixes forearm;22. support arm Slide large arm;23. support arm companding oil cylinder;24. hinge bar;25. borehole wall wedge;26. revolution driving component one;27. base Seat;28. swing arm;29. swing arm oil cylinder;210. revolution driving components two;211. grab bucket folding oil cylinders;212. grab bucket connections Bar;213. left and right grab buckets;214. contiguous block;215. telescopic arm.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in figure 1, as shown in figure 1, the vertical shaft with high-pressure sprayer of the present invention draws digging car, including automobile chassis 121st, power and cooling system, underframe 17 and leg system, hydraulic pressure and electric control system, jib lubbing mechanism, flexible arm assembly 14, Can bending grab bucket mechanism 15, high-pressure sprayer.
Automobile chassis 121 is a standard chassis, possesses self maneuverability, meets China's road traffic laws and regulationses and this is made Every relevant regulations.
Power and cooling system are made up of Diesel engine 3, radiator 2, hydraulic pump 4, and hydraulic pump 4 is from Diesel engine 3 Power taking provides pressure oil for each executive item of hydraulic system.
Underframe and leg system include underframe 17, forward and backward supporting leg 16, and forward and backward supporting leg 16 is fixed on underframe 17, underframe 17, with various connection installing plates, are coupled by bolt with each part and automobile chassis crossbeam.
Hydraulic pressure and electric control system are controlled by hydraulic valve bank 19, joystick 120, hydraulic oil container 5, electric cabinet 18, sensing Element processed, connecting pipeline composition.
Jib lubbing mechanism by large arm 9, forearm 10, large arm amplitude oil cylinder 11, forearm amplitude oil cylinder 12, telescopic arm hitch 13, Turbine and worm drive pair 8 is constituted.The lower end of large arm 9 is connected by bolts with turbine and worm drive pair 8, the upper end of large arm 9 and forearm 10 Lower end is hinged by hinge, the upper end of forearm 10 with telescopic arm hitch 13, telescopic arm hitch 13 connection telescopic arm 14 with Forearm 10, passes through the flexible grab bucket mechanism for driving telescopic arm 14 and being installed on it of the piston rod of forearm amplitude oil cylinder 12 being hinged therewith 15 realize luffing, and the other end of turbine and worm drive pair 8 is installed and is fixed on underframe 17, and it is whole that turbine and worm drive pair 8 rotates drive Individual jib lubbing mechanism carries out operation in the upper rotary of underframe 17 with the working region that car different range is dug to being drawn from vertical shaft.
Flexible arm assembly 14 is using the heavy suit of four joint arms, the stretching structure of steel wire rope oiling cylinder, and this is common with the market The engineering truck stretching structure of other type belt telescopic arms is as good as, and does not do excessive elaboration herein.
High-pressure sprayer is made up of water pump 6, water tank 1, connecting pipeline, water injector 7.The vertical shaft is drawn digging car water pump 6 and adopted Import high-pressure plunger pump is used, is fetched water by carrying water tank 1, the water jet of height cumulative can be provided, mechanism 15 is grabbed along vertical shaft in grab bucket Take it is various silt thing up, after preliminary dredging vertical shaft, sprayed water with high pressure by water injector 7, to reach to the thorough dredging of drainage pipeline networks Purpose, water injector 7 is a sprinkler with water pipe reel and fountain head.
Can bending grab bucket mechanism include underground supporting arm mechanism, revolution driving component 1, grab bucket oscillating arm mechanisms, revolution drive Dynamic component 2 210, grab bucket;Grab bucket is connected by revolution driving component 2 210 with grab bucket oscillating arm mechanisms, and grab bucket oscillating arm mechanisms pass through Revolution driving component 1 is connected with underground supporting arm mechanism;
Underground supporting arm mechanism includes support arm and fixes forearm 21, support arm slip large arm 22, support bar component, support arm Companding oil cylinder 23, it is a tubular construction part that support arm, which fixes forearm 21, is taken, lower shoe couples ear with various, and its upper plate leads to Cross bolt and vertical shaft and draw the lower shoe of digging car telescopic arm 215 and couple, lower shoe couples with revolution driving component 1;Support arm is slided Large arm 22 is also a tubular construction part, is set in support arm and fixes on forearm 21, take, second line of a couplet lug, ear and branch are coupled thereon The rod head end of brace companding oil cylinder 23 is by hinge, and the ear that couples that second line of a couplet lug is fixed on forearm 21 with support arm passes through bearing pin It is hinged;Support bar component is made up of two hinge bars 24 and borehole wall wedge 25, and the one end of two hinge bar 24 fixes small with support arm respectively Arm 21, support arm slide large arm 22 by hinge, and the other end is hinged with borehole wall wedge 25, and the digging car course of work is drawn in vertical shaft In, telescopic arm 215 is stretched, and underground supporting arm mechanism enters in vertical shaft, and the piston rod of support arm companding oil cylinder 23 is acted in pressure oil It is lower to retract, drive the action of support bar component, borehole wall wedge 25 just can reliablely and stablely fit the borehole wall, further draw digging for grab bucket and carry For rigid support.
Revolution driving component 1 is a turbine and worm drive pair, and the support arm that it couples underground supporting arm mechanism fixes small Arm 21 and the pedestal 27 of grab bucket oscillating arm mechanisms.
Grab bucket oscillating arm mechanisms are made up of pedestal 27, swing arm 28, swing arm oil cylinder 29, swing arm 28 and pedestal 27, swing arm oil cylinder 29 With pedestal 27, swing arm oil cylinder 29 with swing arm 28 by hinge, flexible by the piston rod of swing arm oil cylinder 29 just can be realized 90 degree of swings of swing arm, the lower end of swing arm 28 separately carries hinge hole, coupled by bearing pin with revolution driving component 2 210.
Revolution driving component 2 210 is a rotation motor, and the lower end output shaft of rotation motor passes through key and bucket folding oil The cylinder tube base connection of cylinder 211.
Grab bucket is made up of left and right grab bucket 213, bucket folding oil cylinder 211, grab bucket connecting rod 212, contiguous block 214, left and right Grab bucket 213, grab bucket connecting rod 212 have two connection ears;The cylinder tube base band two of bucket folding oil cylinder 211 couple ear, respectively with The first line of a couplet lug of connecting rod 212 grab bucket by hinge, the grab bucket second line of a couplet lug of connecting rod 212 is hinged with left and right grab bucket 213;Left, The right another connection ear of grab bucket 213 is hinged with contiguous block 214;Contiguous block 214 is relatively fixed with the piston rod of bucket folding oil cylinder 211 again Connection;So, the piston rod of bucket folding oil cylinder 211 is flexible just can drive the folding of left and right grab bucket 213, crawl to silt thing up.
The vertical shaft of the present invention draws digging car in the course of the work, and the piston rod of underground supporting arm mechanism support arm companding oil cylinder 23 exists Pressure oil effect is lower to be retracted, and drives the action of support bar component, and borehole wall wedge 25 is reliablely and stablely fitted the borehole wall, while swing arm oil cylinder 29 piston rods are retracted, and swing arm 8 can be put into vertical shaft vertical direction into an angle of 90 degrees, and revolution driving component 2 210 rotates this moment, bucket The piston rod of folding oil cylinder 211 stretches, so just easily realize by it is vertical with vertical shaft and communicate, close treat the certain model of desilting vertical shaft Underground pipe network in enclosing silts thing crawl, the purpose of dredging up, and then reaches to vertical shaft progress desilting comprehensive, without dead angle.Should Vertical shaft is substantially increased with the grab bucket mechanism draw and dig the vertical shaft of car and draw digging scope and operating efficiency.Simultaneously because the type vertical shaft draws digging Car itself is integrated with high-pressure sprayer, without the dredging vehicle water spray that please separately be sprayed water with high pressure again after conventional vertical shaft grab trolley draws digging Thoroughly dredging, this just greatlys save construction cost, significantly improves operating efficiency and dredging effect.The invention, simple in construction, It is safe and efficient.
Above is having carried out exemplary description to the present invention, it is clear that realization of the invention is not limited by aforesaid way System, if the various improvement of technical solution of the present invention progress are employed, or it is not improved by the design of the present invention and technical scheme Other occasions are directly applied to, within the scope of the present invention.

Claims (1)

1. a kind of vertical shaft draws digging car, it is characterised in that including chassis portion and upper dress part, chassis portion includes power and radiating System, underframe and leg system;Upper dress part include flexible arm assembly, jib lubbing mechanism, can bending grab bucket mechanism, spray water with high pressure dress Put, hydraulic pressure and electric control system;
The power and cooling system by Diesel engine, radiator, hydraulic pressure pump group into, hydraulic pump from engine torque extraction be hydraulic pressure Each executive item of system provides pressure oil;
The underframe and leg system include underframe, forward and backward supporting leg, and forward and backward supporting leg is fixed on underframe, and underframe band is various Installing plate is connect, is coupled by bolt with each part and automobile chassis crossbeam;
The hydraulic pressure and electric control system are by hydraulic valve bank, joystick, hydraulic oil container, electric cabinet, sensing control element, connection Take over road composition;
The jib lubbing mechanism is driven by large arm, forearm, large arm amplitude oil cylinder, forearm amplitude oil cylinder, telescopic arm hitch, turbine and worm Dynamic secondary composition, large arm lower end is connected by bolts with turbine and worm drive pair, and large arm upper end is cut with scissors with forearm lower end by bearing pin Connect, forearm upper end is hinged with telescopic arm hitch, telescopic arm hitch connection telescopic arm and forearm pass through the forearm being hinged therewith Amplitude oil cylinder piston rod is flexible to drive telescopic arm and the grab bucket mechanism being installed on it to realize luffing, the turbine and worm drive pair other end Installation is fixed on underframe, and turbine and worm drive pair, which is rotated, drives whole jib lubbing mechanism in underframe upper rotary, with to being drawn from vertical shaft The working region for digging car different range carries out operation;
The flexible arm assembly is using the heavy suit of four joint arms, the stretching structure of steel wire rope oiling cylinder;It is described can bending grab claw Structure is arranged on telescopic arm;
The high-pressure sprayer includes water pump, water tank, connecting pipeline, water injector;The water injector is that a band water pipe is rolled up The sprinkler of cylinder and fountain head, the water pump uses high-pressure plunger pump, by carrying water tank water intaking;
It is described can bending grab bucket mechanism include underground supporting arm mechanism, revolution driving component one, grab bucket oscillating arm mechanisms, revolution and drive Dynamic component two, grab bucket;The grab bucket is connected by the revolution driving component two with the grab bucket oscillating arm mechanisms, the grab bucket pendulum Arm mechanism is connected by the revolution driving component one with the underground supporting arm mechanism;
The grab bucket oscillating arm mechanisms are made up of pedestal, swing arm, swing arm oil cylinder;Swing arm and pedestal, swing arm oil cylinder and pedestal, swing arm oil Cylinder is with swing arm by hinge, and flexible by swing arm cylinder piston rod just can realize 90 degree of swings of swing arm, under swing arm End separately carries hinge hole, is coupled by bearing pin with revolution driving component two;
The underground supporting arm mechanism includes support arm and fixes forearm, support arm slip large arm, support bar component, support arm companding Oil cylinder, it is a tubular construction part that support arm, which fixes forearm, is taken, lower shoe couples ear with various, its upper plate by bolt and Vertical shaft draws the lower shoe connection of digging car telescopic arm, and lower shoe couples with revolution driving component one;It is also one that support arm, which slides large arm, Shape structural member, is set in support arm and fixes on forearm, take, second line of a couplet lug, ear and support arm companding oil cylinder head are coupled thereon End is by hinge, and the ear that couples that second line of a couplet lug is fixed on forearm with support arm passes through hinge;Support bar component is by two Hinge bar and borehole wall wedge composition, two hinge bar one end fix forearm, support arm slip large arm with support arm and pass through bearing pin respectively It is hinged, the other end is hinged with borehole wall wedge, during vertical shaft draws digging turner work, telescopic arm stretches, and underground supporting arm mechanism enters Enter in vertical shaft, support arm companding cylinder piston rod is retracted under pressure oil effect, drive the action of support bar component, borehole wall wedge is just Can be fitted the borehole wall, and further drawing digging for grab bucket provides rigid support;
Revolution driving component one in the grab bucket mechanism is a turbine and worm drive pair, and it couples the branch of underground supporting arm mechanism Forearm and the pedestal of grab bucket oscillating arm mechanisms are fixed in brace;
The grab bucket is made up of left and right grab bucket, grab bucket folding oil cylinder, grab bucket connecting rod, contiguous block, left and right grab bucket, grab bucket connection Bar has two connection ears;Folding oil cylinder cylinder tube base band two of grabbing bucket couples ear, passes through respectively with grab bucket connecting rod first line of a couplet lug Hinge, grab bucket connecting rod second line of a couplet lug is hinged with grab bucket;Left and right another connection ear of grab bucket is hinged with contiguous block;Contiguous block It is relatively fixed and couples with grab bucket folding cylinder piston rod again;Grab bucket folding cylinder piston rod is flexible just can drive the folding of grab bucket, Thing is silted in crawl up;
Revolution driving component two in the grab bucket mechanism is a rotation motor, and the lower end output shaft of rotation motor is by key with grabbing The cylinder tube base connection of bucket folding oil cylinder.
CN201610018704.0A 2016-01-13 2016-01-13 A kind of vertical shaft draws digging car Active CN105544717B (en)

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KR101185621B1 (en) * 2010-07-13 2012-09-25 유양기술 주식회사 Dredging device for sludge using ejector and air tank
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