CN107298376A - A kind of large vehicle walking drive mechanism of bridge crane - Google Patents

A kind of large vehicle walking drive mechanism of bridge crane Download PDF

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Publication number
CN107298376A
CN107298376A CN201710736429.0A CN201710736429A CN107298376A CN 107298376 A CN107298376 A CN 107298376A CN 201710736429 A CN201710736429 A CN 201710736429A CN 107298376 A CN107298376 A CN 107298376A
Authority
CN
China
Prior art keywords
wheel
motor
girder
shaft
reductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710736429.0A
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Chinese (zh)
Inventor
苗则波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHU CHANGJIANG JACK-UP EQUIPMENT Co Ltd
Original Assignee
WUHU CHANGJIANG JACK-UP EQUIPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WUHU CHANGJIANG JACK-UP EQUIPMENT Co Ltd filed Critical WUHU CHANGJIANG JACK-UP EQUIPMENT Co Ltd
Priority to CN201710736429.0A priority Critical patent/CN107298376A/en
Publication of CN107298376A publication Critical patent/CN107298376A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/10Undercarriages or bogies, e.g. end carriages, end bogies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/14Trolley or crane travel drives

Abstract

The invention discloses a kind of large vehicle walking drive mechanism of bridge crane, including girder, girder two ends are installed with end carriage, girder inside center is provided with motor and speed reducer, end carriage is provided with wheel by angle-style bearing housing, angle-style bearing housing includes axletree, extend motor shaft in motor one end, motor shaft is connected with input shaft by plum coupling, input shaft one end is connected with worm screw, worm screw is connected with drive and output wheel in turn, output wheel center is installed with output shaft, output shaft two ends are connected with downshift lever, adapter atop is provided with brake, control the vehicle wheel rotation of the girder left and right sides simultaneously by a motor and speed reducer, protect wheel and track, the design of plum coupling makes motor higher to the transmission efficiency of reductor, slowed down by worm-gear speed reducer, retardation efficiency is higher, the self-locking structure of reductor coordinates brake faster more timely, improve the operating efficiency of crane.

Description

A kind of large vehicle walking drive mechanism of bridge crane
Technical field
The present invention relates to crane technical field, the large vehicle walking drive mechanism of specially a kind of bridge crane.
Background technology
Bridge crane is a kind of crane span structure type crane that crane span structure is run on aerial conveyor, also known as overhead traveling crane.Overhead traveling crane The crane span structure of machine along be laid on both sides it is overhead on track it is longitudinally running, trolley is laterally transported along the track being laid on crane span structure OK, the working range of a rectangle is constituted, it is possible to the space handling material below crane span structure is made full use of, not by ground installation Hinder.This crane is widely used in indoor and outdoor warehouse, factory building, harbour and outdoor yard etc., is made up of girder and end carriage, It is divided into single girder crane span structure and the class of double girder bridge two.End carriage of single girder crane span structure by single girder and positioned at span both sides is constituted, double Beam bridge frame is made up of two girders and end carriage.Girder is rigidly connected with end carriage, and end carriage two ends are equipped with wheel, exist to support crane span structure Overhead upper operation.The structure type of bridge girder is more, has box structure, four truss structures and vierendeel truss than more typical The combination of structure, girder and end carriage is generally referred to as cart.Bridge crane wheel is run on special track, crane runway For supporting the total weight of crane, it is ensured that equipment is normal, orientation is run.But wheel is transported in track centre sometimes OK, thus occur wheel rim and track side surfaces contact friction gnaw rail phenomenon.
The large vehicle walking drive mechanism of existing bridge crane has the following disadvantages and problem:
(1) it is all by the motor positioned at girder both sides that the large vehicle walking drive mechanism of existing bridge crane is most of Control the wheel on both sides respectively with reductor, not only increase machine cost, it is necessary to two motor and speed reducer models, speed Degree, performance all same, and the drive device on both sides will be while synchronous rotary, such drive device be easily because of some motor Or reductor breaks down and speed change makes two sidecar wheel discontinuity and gnaws rail phenomenon, in addition, two wheels are not straight The contact connect, two wheels are also easily outer inclined or interior inclined and gnaw rail phenomenon, gnaw rail phenomenon for wheel edge friction track side Edge, very big abrasion can be caused to wheel and track, reduce wheel life;
(2) motor shaft connects the input shaft of reductor by power transmission shaft, and then is driven, and motor shaft rotatory force passes through power transmission shaft Transmission can be lossy, therefore motor can be reduced to the transmission efficiency of reductor, and in crane a motor and one The design of reductor is for easy disassembly and maintenance, and the left side or right side that motor and speed reducer typically can be all arranged on to girder are leaned on The place of proximal end face, such mounting means make because of the increase of moment of torsion that reductor is subject to motor to the delivery efficiency of wheel significantly Reduction, meanwhile, because the physics center of gravity of girder is offset because of its internal gravity installed, dolly general position when crane is unloaded In centre, so the at this moment left and right wheelses discontinuity equalization of cart, cart fluctuation of service, easily gnaw rail phenomenon;
(3) reductor of the large vehicle walking drive mechanism of existing bridge crane is most of all uses gear reduction unit, Noise more very much not says that retardation efficiency is also than relatively low, it is necessary to which the structure of multiple drive can be only achieved very high retardation efficiency, increases The big complexity of speed reducer structure, and existing brake is typically all arranged on motor, after motor braking, because inertia, Reductor and wheel can the segment distance of automatically walk one, cart inertia walking distance it is longer, extend the ETL estimated time of loading that unloads of goods, drop The low operating efficiency of lifting project.
The content of the invention
In order to overcome the shortcomings of prior art, the present invention provides a kind of large vehicle walking driving machine of bridge crane Structure, controls the vehicle wheel rotation of the girder left and right sides, motor is to wheel simultaneously by a motor and speed reducer at girder center Transmission efficiency is higher, protects wheel and track, makes motor to subtracting using plum coupling connection between motor shaft and input shaft The transmission efficiency of fast machine is higher, and the purpose that the output to motor is slowed down is reached by worm gear-endless screw reductor, effect of slowing down Rate is high, and the self-locking structure of reductor coordinates brake faster more in time, to improve the operating efficiency of crane, can effectively solve The problem of certainly background technology is proposed.
The technical solution adopted for the present invention to solve the technical problems is:A kind of large vehicle walking driving machine of bridge crane Structure, including girder, the girder two ends are installed with end carriage, and the girder inside center is provided with motor and speed reducer, institute State end carriage and wheel be provided with by angle-style bearing housing, the angle-style bearing housing includes angle-style case and axletree, the angle-style case and Wheel is installed on the outside of axletree, and motor shaft is extended in described motor one end, and the motor shaft is fixed by plum coupling Input shaft is connected with, described input shaft one end pierces into reductor and is fixedly connected with worm screw, and the worm engaging has worm gear, the snail Wheel is arranged in reductor by power transmission shaft, and the worm gear is engaged with output wheel, and the output wheel is fixedly mounted in the axial direction There is output shaft, the output shaft two ends pass reductor, and the output shaft two ends are fixedly connected with deceleration by shaft coupling Bar, the shaft coupling lateral surface is provided with brake, and the downshift lever outer end is connected with axletree the inner.
As a kind of preferred technical scheme of the present invention, the girder has in hollow structure inside, the hollow structure Hollow sandwich is installed, the motor and speed reducer is fixedly mounted in hollow sandwich, and the conjunction center of gravity of motor and speed reducer with Girder center superposition.
As a kind of preferred technical scheme of the present invention, the girder front side or rear side middle part are provided with service ports, institute State service ports unified with hollow sandwich position, the service ports are while be hinged with installation door.
As a kind of preferred technical scheme of the present invention, the wheel described in two is parallel to each other, and two wheels are on master The Central Symmetry of beam.
As a kind of preferred technical scheme of the present invention, the wheel for inputting is fixedly mounted on the outside of input shaft, described defeated Go out wheel to be fixedly mounted on the outside of output shaft.
As a kind of preferred technical scheme of the present invention, the output wheel diameter is bigger than worm gear diameter, the input shaft and Output shaft is arranged on the side of reductor by bearing.
As a kind of preferred technical scheme of the present invention, the downshift lever is connected with axletree by shaft coupling, two institutes The downshift lever stated is on output wheel Central Symmetry.
As a kind of preferred technical scheme of the present invention,
Compared with prior art, the beneficial effects of the invention are as follows:
(1) present invention controls the vehicle wheel rotation of the girder left and right sides by a motor and a reductor simultaneously, makes two While individual wheel synchronous same-speed rotation, and two wheel being fixedly connected by downshift lever, two wheels is remained flat OK, it is not susceptible to gnaw the phenomenon of rail, protects wheel and track;
(2) present invention shortens motor with subtracting by being joined directly together between motor shaft and input shaft using plum coupling The transmission distance of fast machine, makes motor higher to the transmission efficiency of reductor, and the conjunction center of gravity of motor and speed reducer is located at girder Physical centre, positioned at the wheel uniform force of girder both sides when crane is unloaded, large vehicle walking is more stable, protects wheel and rail Road, and the moment of torsion that design of the reductor in the middle of girder bears reductor is small, reductor pressure is smaller, and motor is to wheel Transmission efficiency is higher;
(3) present invention reaches the purpose that the output to motor is slowed down, retardation efficiency by worm gear-endless screw reductor Height, noise is small, and worm gear-endless screw reductor has deceleration self-locking structure, coordinates the brake being arranged on the outside of shaft coupling to subtracting The braking of fast bar, makes after motor power-off deceleration, faster more in time, inertia walking has saved man-hour apart from shorter, improves for braking The operating efficiency of crane.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention;
Fig. 2 schemes for the reductor internal gear engagement of the present invention;
Fig. 3 is erection of main beam figure of the invention.
In figure:1- girders;2- end carriages;3- motors;4- reductors;5- angle-style bearing housings;6- wheels;7- angle-style casees;8- cars Wheel shaft;9- motor shafts;10- plum couplings;11- input shafts;12- power transmission shafts;13- worm screws;14- worm gears;15- output wheels;16- Output shaft;17- shaft couplings;18- downshift levers;19- brakes;20- hollow sandwiches;21- service ports;22- installation doors;23- bearings.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
The explanation of following embodiment is refer to the attached drawing, can be to the specific embodiment implemented to the example present invention. Direction and position term that the present invention is previously mentioned, such as " on ", " in ", " under ", "front", "rear", "left", "right", " interior ", " Outside ", " side " etc., is only the direction and position with reference to annexed drawings.Therefore, the direction and position term used is to illustrate And understand the present invention, and it is not used to the limitation present invention.
Embodiment:
As shown in figure 1, the invention provides a kind of large vehicle walking drive mechanism of bridge crane, including girder 1, girder 1 is provided with trolley track, and the two ends of girder 1 are installed with end carriage 2, and end carriage 2 is connected with girder 1, and the end carriage 2 passes through angle Type bearing housing 5 is provided with wheel 6, and angle-style bearing housing 5 is arranged on the outside of end carriage 2, and angle-style bearing housing 5 plays fixing vehicle wheel, taken Cart pressure, makes cart walking with load more smooth, and the angle-style bearing housing 5 includes angle-style case 7 and axletree 8, the angle Molding box 7 and wheel 6 are installed in the outside of axletree 8, and angle-style case 7 can carry out spacing to wheel 6 well, be provided with angle-style case 7 Some bearing groups, for buffering the gravity that axletree 8 is subject to.
As shown in figures 1 and 3, the inside center of girder 1 is provided with motor 3 and reductor 4, and the girder 1 has interior Hollow sandwich 20 is installed, the motor 3 and reductor 4 are fixedly mounted on hollow folder in portion's hollow structure, the hollow structure In layer 20, the design of hollow sandwich 20 enables motor 3 and reductor 4 to be preferably fixed in girder;The front side of the girder 1 or after Side middle part is provided with service ports 21, and the service ports 21 are unified with the position of hollow sandwich 20, and described one side of service ports 21 is hinged There is installation door 22, the design of service ports 21 is more convenient inspection and maintenance, and the top end face of installation door 22 is provided with closing lock, installs Drive device when door 22 is closed in protection girder 1, can overhaul drive mechanism during unlatching;And the conjunction weight of motor 3 and reductor 4 The heart and the center superposition of girder 1, the wheel 6 described in two is parallel to each other, and Central Symmetry of two wheels 6 on girder 1, makes drive The center of gravity of motivation structure is located at girder physical centre, and when crane is unloaded, dolly is generally placed in the middle of girder, and at this moment dolly is not required to Adjustment, cart directly run can, at this moment cart is stable, two uniform forces of wheel 6, is not susceptible to gnaw rail phenomenon, guarantor Wheel 6 and track are protected.
As shown in figure 1, motor 3 is total drive device, reductor 4 is deceleration device, and motor is extended in described one end of motor 3 Axle 9, the motor shaft 9 is fixedly connected with input shaft 11 by plum coupling 10, and plum coupling 10 is simple in construction, need not moisten Slide, conveniently repair, being easy to check, it is non-maintaining, can continuous longtime running, flexible body structure, height in the middle of plum coupling 10 Intensity elastic polyurethane element wear-resistance and oil-resistance, absorbable vibration, compensation radial direction, angular and axial deviation, with oil resistant and electrically Insulation function, and it is identical with turning anticlockwise characteristic clockwise, large carrying capacity, service life is long, stable and reliable in work, Radial dimension is small, lightweight, and rotary inertia is small, it is adaptable to high speed occasion, and these advantages make motor shaft 9 and input shaft 11 direct After being connected, motor 3 is higher to the transmission efficiency of reductor 4, also saves the space between motor 3 and reductor 4, fills driving Space-consuming is put to diminish;During a motor 3 and reductor 4 that the present invention is used, save the quantity of motor 3, and reductor 4 is located at Between, the torque suffered by reductor 4 is reduced, makes the transmission efficiency of reductor 4 higher, cart operation is more stable.
As depicted in figs. 1 and 2, described one end of input shaft 11 pierces into reductor 4 and is fixedly connected with worm screw 13, the worm screw 13 Worm gear 14 is engaged with, the worm gear 14 is arranged in reductor 4 by power transmission shaft 12, and the worm gear 14 is engaged with output wheel 15, The diameter of output wheel 15 is bigger than the diameter of worm gear 14, and the input shaft 11 and output shaft 16 are arranged on reductor by bearing 23 4 side, the protection input shaft 11 of bearing 23 and output shaft 16, are allowed to steady operating, the helical rotation of worm screw 13 in the horizontal plane Rotation of the worm gear 14 on vertical plane is driven, reaches the first purpose slowed down again, worm screw 14 drives output wheel 15 to rotate, because of output Take turns 15 diameters and the number of teeth bigger than worm gear 14, so reach the second effect slowed down again, slowing effect is more stable;The output wheel 15 are installed with output shaft 16 in the axial direction, and the wheel for inputting 15 is fixedly mounted on the outside of input shaft 11, the output Wheel 14 is fixedly mounted on the outside of output shaft 16, so installs and rotates more steady, structure is closer, and the two ends of output shaft 16 are worn Go out reductor 4, reductor 4 here has auto-lock function, because in the kind of drive of worm gear-endless screw reductor, snail Worm and gear transmission, which possesses other gear drives, does not have characteristic, i.e. worm screw to rotate worm gear easily, but worm gear can not rotate snail Bar, because the structure of worm and gear and transmission are realized by rubbing and caused, worm gear-endless screw reductor and The gear deceleration It is exactly that, with auto-lock function, this auto-lock function is after motor 3 and reductor 4 are powered off, the worm gear 14 inside reductor 4 that machine, which is compared, Because worm screw 13 can not be promoted, so after reductor 4 is powered off, wheel 6 drives output shaft 16 to rotate because inertia is moved on, and snail Wheel 14 and the frictional force of worm screw 13 prevent output shaft 16 from rotating again, have reached the purpose of braking, reduce cart braking rear wheel 6 Inertia walking distance, improve operating efficiency, save man-hour.
As shown in figure 1, the two ends of output shaft 16 are fixedly connected with downshift lever 18, the shaft coupling on both sides by shaft coupling 17 Device 17 is buffered the moment of torsion between output shaft 16 and downshift lever 18, makes transmission efficiency higher, the downshift lever 18 and wheel Axle 8 is connected by shaft coupling 17, and the outer end of downshift lever 18 described in downshift lever is connected with the inner of axletree 8, the downshift lever described in two 18 on the Central Symmetry of output wheel 15, and symmetrical design makes wheel 6 with respect to the Central Symmetry of girder 1 and two wheels are parallel, and two The individual uniform force of wheel 6, along with wheel 6 is fixed on the two ends of output shaft 16 by downshift lever 18, wheel 6 passes through double structure Design makes it be less susceptible to gnaw rail phenomenon, protects wheel 6 and track, cart is run driving structure service life longer.
As shown in figure 1, the lateral surface of shaft coupling 17 is provided with brake 19, brake 19 is arranged on shaft coupling 17 here Benefit above outside is:When needing the cart to stop, motor 3 and reductor 4 are powered off, and brake 19 is braked, brake 19 with The frictional force increase of shaft coupling 17, directly makes the axletree 8 and the braking forced deceleration of wheel 6 being fixedly connected with downshift lever 18, plus The latching characteristics of upper worm gear-endless screw reductor, braking distance and time are shorter, and inertia walking has been saved man-hour apart from short, improve The operating efficiency of crane.
In summary, the main characteristic of the invention lies in that:
(1) present invention controls the vehicle wheel rotation of the girder left and right sides by a motor and a reductor simultaneously, makes two While individual wheel synchronous same-speed rotation, and two wheel being fixedly connected by downshift lever, two wheels is remained flat OK, it is not susceptible to gnaw the phenomenon of rail, protects wheel and track;
(2) present invention shortens motor with subtracting by being joined directly together between motor shaft and input shaft using plum coupling The transmission distance of fast machine, makes motor higher to the transmission efficiency of reductor, and the conjunction center of gravity of motor and speed reducer is located at girder Physical centre, positioned at the wheel uniform force of girder both sides when crane is unloaded, large vehicle walking is more stable, protects wheel and rail Road, and the moment of torsion that design of the reductor in the middle of girder bears reductor is small, reductor pressure is smaller, and motor is to wheel Transmission efficiency is higher;
(3) present invention reaches the purpose that the output to motor is slowed down, retardation efficiency by worm gear-endless screw reductor Height, noise is small, and worm gear-endless screw reductor has deceleration self-locking structure, coordinates the brake being arranged on the outside of shaft coupling to subtracting The braking of fast bar, makes after motor power-off deceleration, faster more in time, inertia walking has saved man-hour apart from shorter, improves for braking The operating efficiency of crane.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as to the claim involved by limitation.

Claims (7)

1. a kind of large vehicle walking drive mechanism of bridge crane, including girder (1), it is characterised in that:Girder (1) two ends End carriage (2) is installed with, girder (1) inside center is provided with motor (3) and reductor (4), and the end carriage (2) passes through Angle-style bearing housing (5) is provided with wheel (6), and the angle-style bearing housing (5) includes angle-style case (7) and axletree (8), the angle-style Case (7) and wheel (6) are installed on the outside of axletree (8), and motor shaft (9), the motor shaft are extended in described motor (3) one end (9) input shaft (11) is fixedly connected with by plum coupling (10), it is fixed that reductor (4) is pierced into described input shaft (11) one end Worm screw (13) is connected with, the worm screw (13) is engaged with worm gear (14), and the worm gear (14) is arranged on by power transmission shaft (12) to be subtracted In fast machine (4), the worm gear (14) is engaged with output wheel (15), and the output wheel (15) is installed with output in the axial direction Axle (16), output shaft (16) two ends pass reductor (4), and output shaft (16) two ends are solid by shaft coupling (17) Surely be connected with downshift lever (18), shaft coupling (17) lateral surface is provided with brake (19), downshift lever (18) outer end with The connection of axletree (8) the inner.
2. a kind of large vehicle walking drive mechanism of bridge crane according to claim 1, it is characterised in that:The girder (1) have and hollow sandwich (20) is installed in hollow structure inside, the hollow structure, the motor (3) and reductor (4) are solid Dingan County is in hollow sandwich (20), and the conjunction center of gravity and girder (1) center superposition of motor (3) and reductor (4).
3. a kind of large vehicle walking drive mechanism of bridge crane according to claim 1, it is characterised in that:The girder (1) front side or rear side middle part are provided with service ports (21), and the service ports (21) are unified with hollow sandwich (20) position, described Service ports (21) are while be hinged with installation door (22).
4. a kind of large vehicle walking drive mechanism of bridge crane according to claim 1, it is characterised in that:Described in two Wheel (6) be parallel to each other, and Central Symmetry of two wheels (6) on girder (1).
5. a kind of large vehicle walking drive mechanism of bridge crane according to claim 1, it is characterised in that:The input Wheel (15) is fixedly mounted on the outside of input shaft (11), and the output wheel (14) is fixedly mounted on the outside of output shaft (16).
6. a kind of large vehicle walking drive mechanism of bridge crane according to claim 1, it is characterised in that:The output Take turns (15) diameter bigger than worm gear (14) diameter, the input shaft (11) and output shaft (16) are arranged on by bearing (23) and slowed down The side of machine (4).
7. a kind of large vehicle walking drive mechanism of bridge crane according to claim 1, it is characterised in that:It is described to slow down Bar (18) is connected with axletree (8) by shaft coupling (17), and the downshift lever (18) described in two is on output wheel (15) center Symmetrically.
CN201710736429.0A 2017-08-24 2017-08-24 A kind of large vehicle walking drive mechanism of bridge crane Pending CN107298376A (en)

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CN201710736429.0A CN107298376A (en) 2017-08-24 2017-08-24 A kind of large vehicle walking drive mechanism of bridge crane

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Application Number Priority Date Filing Date Title
CN201710736429.0A CN107298376A (en) 2017-08-24 2017-08-24 A kind of large vehicle walking drive mechanism of bridge crane

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1884035A (en) * 2005-06-22 2006-12-27 王钢 Method for prevention and treatment of track-gnawing by bridge and gantry crane engine
CN101423065A (en) * 2008-12-05 2009-05-06 丁晓龙 Traction electric motor
CN201343367Y (en) * 2008-12-16 2009-11-11 大连四达高技术发展有限公司 Monorail carrier for conveying workpieces
CN101734558A (en) * 2009-12-31 2010-06-16 上海科大重工集团有限公司 Metallurgy hopper bridge crane
CN102229402A (en) * 2011-05-23 2011-11-02 三一集团有限公司 Rubber-tired container gantry crane and steering device thereof
CN203582291U (en) * 2013-11-11 2014-05-07 山东科瑞机械制造有限公司 Novel lifting equipment for well head equipment
CN204416930U (en) * 2014-11-25 2015-06-24 河南省矿山起重机有限公司 Bridge crane operating unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1884035A (en) * 2005-06-22 2006-12-27 王钢 Method for prevention and treatment of track-gnawing by bridge and gantry crane engine
CN101423065A (en) * 2008-12-05 2009-05-06 丁晓龙 Traction electric motor
CN201343367Y (en) * 2008-12-16 2009-11-11 大连四达高技术发展有限公司 Monorail carrier for conveying workpieces
CN101734558A (en) * 2009-12-31 2010-06-16 上海科大重工集团有限公司 Metallurgy hopper bridge crane
CN102229402A (en) * 2011-05-23 2011-11-02 三一集团有限公司 Rubber-tired container gantry crane and steering device thereof
CN203582291U (en) * 2013-11-11 2014-05-07 山东科瑞机械制造有限公司 Novel lifting equipment for well head equipment
CN204416930U (en) * 2014-11-25 2015-06-24 河南省矿山起重机有限公司 Bridge crane operating unit

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Application publication date: 20171027