CN113060651A - Electric crane with double lifting appliances - Google Patents

Electric crane with double lifting appliances Download PDF

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Publication number
CN113060651A
CN113060651A CN202110284906.0A CN202110284906A CN113060651A CN 113060651 A CN113060651 A CN 113060651A CN 202110284906 A CN202110284906 A CN 202110284906A CN 113060651 A CN113060651 A CN 113060651A
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China
Prior art keywords
rod
fixedly connected
connection part
hinged
main beam
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Granted
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CN202110284906.0A
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Chinese (zh)
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CN113060651B (en
Inventor
钟松杏
张阳川
林宇鹏
吴泽琛
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Quanzhou Yuntai Technology Co Ltd
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Quanzhou Yuntai Technology Co Ltd
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Publication of CN113060651B publication Critical patent/CN113060651B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C19/00Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00Safety gear
    • B66C15/04Safety gear for preventing collisions, e.g. between cranes or trolleys operating on the same track
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C6/00Girders, or track-supporting structures, specially adapted for cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C7/00Runways, tracks or trackways for trolleys or cranes
    • B66C7/02Runways, tracks or trackways for trolleys or cranes for underhung trolleys or cranes
    • B66C7/04Trackway suspension
    • 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
    • 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
    • B66C9/16Travelling gear incorporated in or fitted to trolleys or cranes with means for maintaining alignment between wheels and track
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/067Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs

Abstract

The invention relates to the technical field of cranes, in particular to an electric crane with double cranes, which comprises a beam body, a crane component, a positioning structure and a synchronous connecting structure; the roof beam body includes girder, guide bar, hinge bar and actuating mechanism, the guide bar is parallel with the girder and is located the both sides at girder top, hinge bar one end is articulated with the tip of guide bar, and the other end is articulated with the tip of girder, actuating mechanism is connected with the hinge bar and drives the swing of hinge bar. The invention has the beneficial effects that: the two lifting appliance assemblies can respectively lift and convey different workpieces, so that the lifting efficiency of the electric crane is improved; the two lifting appliances can also be mutually butted and combined into a whole, so that the stability of the beam products is improved; the guide rod can control the running direction of the running vehicle to be stable, and meanwhile, the bent position of a maintenance worker can be conveniently positioned when the main beam is bent.

Description

Electric crane with double lifting appliances
Technical Field
The invention relates to the technical field of cranes, in particular to an electric crane with double cranes.
Background
The single-beam suspended electric crane is generally used in processing workshops, loading and unloading workshops, warehouses and the like of factories, a main body structure is generally formed by a beam body and end beams connected to two ends of the beam body, and the bottom of the beam body is generally only provided with a lifting appliance assembly which runs on the beam body to lift and transport workpieces.
Because the holistic structure of electric hoist limits, often only can install an electric hoist in a factory building, and only set up a hoist subassembly on the electric hoist of current, this just leads to electric hoist to the hoist and mount efficiency of work piece lower, especially to the enterprise that sets up two production lines side by side in the delivery room, two production lines often can't carry out the hoist and mount step simultaneously. In addition, when to hoist and mount roof beam class product, single hoist often can lead to the balance when can't keep roof beam class product hoist and mount, and then makes the stability of hoist and mount not enough, has certain potential safety hazard.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided is an electric crane with double lifting tools, which can improve lifting efficiency and lifting stability.
In order to solve the technical problems, the technical scheme of the invention is as follows: an electric crane with double cranes comprises a beam body, a crane component, a positioning structure and a synchronous connecting structure;
the beam body comprises a main beam, guide rods, hinged rods and a driving mechanism, the guide rods are parallel to the main beam and located on two sides of the top of the main beam, one end of each hinged rod is hinged to the end of each guide rod, the other end of each hinged rod is hinged to the end of the main beam, and the driving mechanism is connected with the hinged rods and drives the hinged rods to swing;
the two lifting appliance assemblies are connected to the bottom of the main beam in a sliding mode and comprise a running vehicle and an electric hoist fixedly connected to one side of the running vehicle;
the positioning structure comprises a connecting rod and a fixed rod, the fixed rod is arranged in parallel with the main beam, a first longitudinal sliding groove is formed in the surface, close to the other running vehicle, of the running vehicle, one end of the fixed rod is connected into the first longitudinal sliding groove in a sliding mode, one end of the connecting rod is connected onto the guide rod in a sliding mode, the other end of the connecting rod is hinged with the fixed rod, and a fixed hole corresponding to the fixed rod when the fixed rod is located at the highest position is formed in the surface of the running vehicle;
the synchronous connection structure comprises a first connection part, a second connection part and a push-pull electromagnet, the first connection part and the second connection part are respectively connected to two different running vehicles, one end, close to the second connection part, of the first connection part is provided with a groove, one end, close to the first connection part, of the second connection part is provided with a lug corresponding to the groove, and the push-pull electromagnet is fixedly connected to the running vehicle where the second connection part is located, and the movable iron core of the push-pull electromagnet is fixedly connected with the second connection part.
Specifically, the girder includes fixed beam, lower fixed beam, bracing roof beam and slide rail, go up fixed beam and fixed beam down and be parallel to each other and through bracing roof beam fixed connection, the guide bar is parallel with last fixed beam and is located the fixed beam both sides, slide rail fixed connection is in the both sides of fixed beam down, the gyro wheel of operation car rolls in the slide rail.
Specifically, every two of the inclined supporting beams are staggered in an X shape.
Specifically, the dead lever includes outer rod cover, interior ejector pin and spring, outer rod cover includes blind end and open end, the one end of interior ejector pin stretches into outside rod cover from the blind end of outer rod cover inside, the spring sets up inside outer rod cover, the one end of spring and the blind end fixed connection of outer rod cover, the tip fixed connection of the other end and interior ejector pin.
Specifically, one end of the inner ejector rod, which is positioned outside the outer rod sleeve, is fixedly connected with a rubber cushion block.
Specifically, a second longitudinal sliding groove is further formed in the running vehicle, and the second connecting portion is connected to the inside of the second longitudinal sliding groove in a sliding mode.
Specifically, limiting ribs are arranged on two sides of the second longitudinal sliding groove, and limiting grooves corresponding to the limiting ribs are formed in the second connecting portion.
Specifically, actuating mechanism includes step motor and the reduction gear of being connected with step motor, step motor fixed connection is in the girder tip, the power output shaft and the articulated mast of reduction gear articulate in the one end fixed connection of girder.
The invention has the beneficial effects that: the two lifting appliance assemblies can respectively lift and convey different workpieces, so that the lifting efficiency of the electric crane is improved; the two lifting appliances can also be mutually butted and combined into a whole, so that the stability of the beam products is improved; the guide rod can control the running direction of the running vehicle to be stable, and meanwhile, the bent position of a maintenance worker can be conveniently positioned when the main beam is bent.
Drawings
Fig. 1 is a first structural schematic diagram of a double-spreader electric crane according to an embodiment of the present invention;
fig. 2 is a second structural schematic diagram of the electric crane with double spreaders according to the embodiment of the invention;
FIG. 3 is a front view of a double spreader electric hoist according to an embodiment of the present invention;
FIG. 4 is a bottom view of a dual spreader electric crane according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a fixing rod according to an embodiment of the present invention;
description of reference numerals:
1. a beam body; 11. a main beam; 111. an upper fixed beam; 112. a lower fixed beam; 113. a diagonal bracing beam; 114. a slide rail; 12. a guide bar; 13. a hinged lever; 14. a drive mechanism; 141. a stepping motor; 142. a speed reducer; 2. a spreader assembly; 21. a running vehicle; 211. a first longitudinal chute; 212. a fixing hole; 213. a second longitudinal chute; 214. limiting ribs; 22. an electric hoist; 3. a positioning structure; 31. a connecting rod; 32. fixing the rod; 321. an outer rod sleeve; 322. an inner ejector rod; 323. a spring; 4. a synchronous connection structure; 41. a first connection portion; 411. a groove; 42. a second connecting portion; 421. a bump; 422. a limiting groove; 43. push-pull type electromagnet.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 5, the electric crane with double cranes of the present invention comprises a beam 1, a spreader assembly 2, a positioning structure 3 and a synchronous connecting structure 4;
the beam body 1 comprises a main beam 11, guide rods 12, hinged rods 13 and a driving mechanism 14, wherein the guide rods 12 are parallel to the main beam 11 and are positioned at two sides of the top of the main beam 11, one end of each hinged rod 13 is hinged with the end part of the guide rod 12, the other end of each hinged rod 13 is hinged with the end part of the main beam 11, and the driving mechanism 14 is connected with the hinged rods 13 and drives the hinged rods 13 to swing;
the two lifting appliance assemblies 2 are connected to the bottom of the main beam 11 in a sliding mode, and each lifting appliance assembly 2 comprises a running vehicle 21 and an electric hoist 22 fixedly connected to one side of the running vehicle 21;
the positioning structure 3 comprises a connecting rod 31 and a fixing rod 32, the fixing rod 32 is arranged in parallel with the main beam 11, a first longitudinal sliding groove 211 is formed in the surface of the other operating vehicle 21 close to the other operating vehicle 21, one end of the fixing rod 32 is slidably connected in the first longitudinal sliding groove 211, one end of the connecting rod 31 is slidably connected to the guide rod 12, the other end of the connecting rod is hinged to the fixing rod 32, and a fixing hole 212 corresponding to the fixing rod 32 located at the highest position is formed in the surface of the operating vehicle 21;
the synchronous connection structure 4 comprises a first connection part 41, a second connection part 42 and a push-pull electromagnet 43, the first connection part 41 and the second connection part 42 are respectively connected to two different operation vehicles 21, a groove 411 is formed in one end, close to the second connection part 42, of the first connection part 41, a bump 421 corresponding to the groove 411 is arranged at one end, close to the first connection part 41, of the second connection part 42, and the push-pull electromagnet 43 is fixedly connected to the operation vehicle 21 where the second connection part 42 is located, and a movable iron core of the push-pull electromagnet 43 is fixedly connected to the second connection part 42.
The working principle of the invention is as follows: when two lifting tool assemblies 2 on the crane respectively lift different workpieces, the operation vehicles 21 of the two lifting tool assemblies 2 respectively move on the beam body 1 through the respective operation vehicles 21 and respectively transport the workpieces to different positions, at this time, the fixing rod 32 of the positioning structure 3 is located at the lowest end of the first longitudinal sliding groove 211 and is staggered with the fixing hole 212 on the other operation vehicle 21, and when the two operation vehicles 21 approach, the fixing rod 32 of one operation vehicle 21 can abut against the surface of the other operation vehicle 21, so that collision between the two operation vehicles 21 is avoided. In addition, one end of the connecting rod 31 of the positioning structure 3 slides on the guide rod 12, so that the accuracy of the running direction of the running vehicle 21 can be ensured, meanwhile, the guide rod 12 does not bear the gravity during hoisting, so that the running vehicle can be always kept horizontal, once the main beam 11 is bent, the running direction of the running vehicle 21 cannot be kept horizontal, so that the connecting rod 31 and the guide rod 12 are inevitably interfered, and then, the maintenance personnel can conveniently and quickly determine the position of the main beam 11, which is deformed.
When two spreader assemblies 2 need to be combined with each other to form a whole, the driving mechanism 14 drives the hinge rod 13 to swing upwards, so that the guide rod 12 swings upwards together, thereby driving the connecting rod 31 to move so that the fixing rod 32 slides upwards along the first longitudinal sliding slot 211, when the fixing rod 32 slides to the top end of the first longitudinal sliding groove 211, the two running carriages 21 are controlled to approach each other, the fixing rod 32 passes through the fixing hole 212 of the other running carriage 21, meanwhile, the push-pull electromagnet 43 of the synchronous connection structure 4 is controlled to be electrified, so that the movable iron core of the push-pull electromagnet 43 drives the second connection part 42 to move upwards until the lug 421 of the second connection part 42 moves to the position above the groove 411 of the first connection part 41, the power supply to the push-pull electromagnet 43 is disconnected, so that the second connecting part 42 moves downwards and the projection 421 is inserted into the groove 411, thereby realizing the butt joint and combination between the two spreader assemblies 2.
As can be seen from the above description, the beneficial effects of the present invention are: the two lifting appliance assemblies can respectively lift and convey different workpieces, so that the lifting efficiency of the electric crane is improved; the two lifting appliances can also be mutually butted and combined into a whole, so that the stability of the beam products is improved; the guide rod can control the running direction of the running vehicle to be stable, and meanwhile, the bent position of a maintenance worker can be conveniently positioned when the main beam is bent.
Further, the main beam 11 includes an upper fixed beam 111, a lower fixed beam 112, an inclined supporting beam 113 and a sliding rail 114, the upper fixed beam 111 and the lower fixed beam 112 are parallel to each other and are fixedly connected through the inclined supporting beam 113, the guide rod 12 is parallel to the upper fixed beam 111 and is located on two sides of the upper fixed beam 111, the sliding rail 114 is fixedly connected to two sides of the lower fixed beam 112, and the roller of the traveling carriage 21 rolls in the sliding rail 114.
According to the description, the main beam is formed by connecting the upper fixed beam and the lower fixed beam which are parallel to each other, so that the upper fixed beam and the lower fixed beam can simultaneously bear loads when a workpiece is hoisted by the hoisting tool, the bearing positions of the upper fixed beam and the lower fixed beam can be staggered by the inclined stay bar, the situation that the main beam is integrally bent due to the fact that the loads are concentrated at the same position is avoided, and the bearing capacity of the main beam is improved.
Further, the raking brace beams 113 are staggered two by two to form an X shape.
As can be seen from the above description, the diagonal bracing beams are staggered two by two to form an X shape, so that the bearing capacity of the main beam and the connection stability between the upper fixed beam and the lower fixed beam can be further improved.
Further, the fixing rod 32 includes an outer rod sleeve 321, an inner push rod 322 and a spring 323, the outer rod sleeve 321 includes a closed end and an open end, one end of the inner push rod 322 extends into the outer rod sleeve 321 from the closed end of the outer rod sleeve 321, the spring 323 is disposed inside the outer rod sleeve 321, one end of the spring 323 is fixedly connected with the closed end of the outer rod sleeve 321, and the other end of the spring 323 is fixedly connected with the end of the inner push rod 322.
According to the description, under the condition that the two running vehicles respectively run, when the two running vehicles approach each other, the end part of the inner ejector rod can abut against the surface of the other running vehicle, and meanwhile, the spring is compressed to enable the inner ejector rod to be recovered to the inner part of the outer rod sleeve to form buffering, so that the situation that the fixed rod is bent due to overlarge impact between the two running vehicles is avoided.
Further, one end of the inner top rod 322, which is located outside the outer rod sleeve 321, is fixedly connected with a rubber cushion block.
Further, a second longitudinal sliding groove 213 is further formed in the operating vehicle 21, and the second connecting portion 42 is slidably connected in the second longitudinal sliding groove 213.
As can be seen from the above description, the second longitudinal sliding groove can improve the stability of the second connecting portion when moving up and down.
Further, two sides of the second longitudinal sliding groove 213 are provided with a limiting rib 214, and the second connecting portion 42 is provided with a limiting groove 422 corresponding to the limiting rib 214.
From the above description, it can be known that when the limiting rib enables the first connecting portion and the second connecting portion to be connected with each other, the second connecting portion can have better horizontal bearing capacity.
Further, the driving mechanism 14 includes a stepping motor 141 and a speed reducer 142 connected to the stepping motor 141, the stepping motor 141 is fixedly connected to the end of the main beam 11, and a power output shaft of the speed reducer 142 is fixedly connected to one end of the main beam 11 where the hinge rod 13 is hinged.
Example one
Referring to fig. 1 and 2, an electric crane with double cranes comprises a beam body 1, a spreader assembly 2, a positioning structure 3 and a synchronous connecting structure 4;
the beam body 1 comprises a main beam 11, guide rods 12, hinged rods 13 and a driving mechanism 14, wherein the guide rods 12 are parallel to the main beam 11 and are positioned at two sides of the top of the main beam 11, one end of each hinged rod 13 is hinged with the end part of the guide rod 12, the other end of each hinged rod 13 is hinged with the end part of the main beam 11, and the driving mechanism 14 is connected with the hinged rods 13 and drives the hinged rods 13 to swing;
the two lifting appliance assemblies 2 are connected to the bottom of the main beam 11 in a sliding mode, and each lifting appliance assembly 2 comprises a running vehicle 21 and an electric hoist 22 fixedly connected to one side of the running vehicle 21;
the positioning structure 3 comprises a connecting rod 31 and a fixing rod 32, the fixing rod 32 is arranged in parallel with the main beam 11, a first longitudinal sliding groove 211 is formed in the surface of the other operating vehicle 21 close to the other operating vehicle 21, one end of the fixing rod 32 is slidably connected in the first longitudinal sliding groove 211, one end of the connecting rod 31 is slidably connected to the guide rod 12, the other end of the connecting rod is hinged to the fixing rod 32, and a fixing hole 212 corresponding to the fixing rod 32 located at the highest position is formed in the surface of the operating vehicle 21;
as shown in fig. 3 and 4, the synchronous connection structure 4 includes a first connection portion 41, a second connection portion 42 and a push-pull type electromagnet 43, the first connecting portion 41 and the second connecting portion 42 are respectively connected to two different traveling vehicles 21, a groove 411 is arranged at one end of the first connecting part 41 close to the second connecting part 42, a bump 421 corresponding to the groove 411 is arranged at one end of the second connecting part 42 close to the first connecting part 41, the push-pull electromagnet 43 is fixedly connected to the running vehicle 21 where the second connecting part 42 is located and the movable iron core of the push-pull electromagnet 43 is fixedly connected with the second connecting part 42, the running vehicle 21 is further provided with a second longitudinal sliding groove 213, the second connecting portion 42 is slidably connected in the second longitudinal sliding groove 213, the two sides of the second longitudinal sliding groove 213 are provided with limiting ribs 214, and the second connecting portion 42 is provided with limiting grooves 422 corresponding to the limiting ribs 214;
the main beam 11 comprises an upper fixed beam 111, a lower fixed beam 112, diagonal bracing beams 113 and slide rails 114, wherein the upper fixed beam 111 and the lower fixed beam 112 are parallel to each other and are fixedly connected through the diagonal bracing beams 113, the guide rod 12 is parallel to the upper fixed beam 111 and is positioned at two sides of the upper fixed beam 111, the slide rails 114 are fixedly connected at two sides of the lower fixed beam 112, rollers of the traveling trolley 21 roll in the slide rails 114, and the diagonal bracing beams 113 are staggered two by two to form an X shape;
as shown in fig. 5, the fixing rod 32 includes an outer rod sleeve 321, an inner push rod 322 and a spring 323, the outer rod sleeve 321 includes a closed end and an open end, one end of the inner push rod 322 extends into the outer rod sleeve 321 from the closed end of the outer rod sleeve 321, the spring 323 is disposed inside the outer rod sleeve 321, one end of the spring 323 is fixedly connected to the closed end of the outer rod sleeve 321, the other end of the spring 323 is fixedly connected to the end of the inner push rod 322, and one end of the inner push rod 322 located outside the outer rod sleeve 321 is fixedly connected to a rubber cushion block;
the driving mechanism 14 includes a stepping motor 141 and a speed reducer 142 connected to the stepping motor 141, the stepping motor 141 is fixedly connected to an end of the main beam 11, and a power output shaft of the speed reducer 142 is fixedly connected to one end of the main beam 11 where the hinge rod 13 is hinged.
In conclusion, the beneficial effects provided by the invention are as follows: the two lifting appliance assemblies can respectively lift and convey different workpieces, so that the lifting efficiency of the electric crane is improved; the two lifting appliances can also be mutually butted and combined into a whole, so that the stability of the beam products is improved; the guide rod can control the running direction of the running vehicle to be stable, and meanwhile, the bent position of a maintenance worker can be conveniently positioned when the main beam is bent. The main beam is formed by the interconnection of the upper fixed beam and the lower fixed beam which are parallel to each other, so that the lifting appliance can simultaneously bear loads by the upper fixed beam and the lower fixed beam when a workpiece is lifted, the inclined support rods can enable the bearing positions of the upper fixed beam and the lower fixed beam to be staggered with each other, the situation that the load is concentrated at the same position to cause the whole main beam to be bent is avoided, and the bearing capacity of the main beam is improved. The bearing capacity of girder and the connection stability between the upper and lower fixed beam can further be improved to two pairwise crisscross X characters that are of bracing roof beam. Under the condition that two operation cars moved respectively, when the two was close to, the tip of interior ejector pin can support another operation car surface, and the spring is compressed simultaneously and is made interior ejector pin retrieve to the inside of outer rod cover, forms the buffering to it is too big and lead to the dead lever to be buckled to avoid strikeing between two operation cars. The second longitudinal sliding groove can improve the stability of the second connecting part in the up-and-down movement process. When spacing fin can make first connecting portion and second connecting portion interconnect, the second connecting portion can have better horizontal direction bearing capacity.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (8)

1. An electric crane with double cranes is characterized by comprising a beam body, a crane component, a positioning structure and a synchronous connecting structure;
the beam body comprises a main beam, guide rods, hinged rods and a driving mechanism, the guide rods are parallel to the main beam and located on two sides of the top of the main beam, one end of each hinged rod is hinged to the end of each guide rod, the other end of each hinged rod is hinged to the end of the main beam, and the driving mechanism is connected with the hinged rods and drives the hinged rods to swing;
the two lifting appliance assemblies are connected to the bottom of the main beam in a sliding mode and comprise a running vehicle and an electric hoist fixedly connected to one side of the running vehicle;
the positioning structure comprises a connecting rod and a fixed rod, the fixed rod is arranged in parallel with the main beam, a first longitudinal sliding groove is formed in the surface, close to the other running vehicle, of the running vehicle, one end of the fixed rod is connected into the first longitudinal sliding groove in a sliding mode, one end of the connecting rod is connected onto the guide rod in a sliding mode, the other end of the connecting rod is hinged with the fixed rod, and a fixed hole corresponding to the fixed rod when the fixed rod is located at the highest position is formed in the surface of the running vehicle;
the synchronous connection structure comprises a first connection part, a second connection part and a push-pull electromagnet, the first connection part and the second connection part are respectively connected to two different running vehicles, one end, close to the second connection part, of the first connection part is provided with a groove, one end, close to the first connection part, of the second connection part is provided with a lug corresponding to the groove, and the push-pull electromagnet is fixedly connected to the running vehicle where the second connection part is located, and the movable iron core of the push-pull electromagnet is fixedly connected with the second connection part.
2. The dual-spreader electric crane according to claim 1, wherein the main beam comprises an upper fixed beam, a lower fixed beam, a raking beam and a slide rail, the upper fixed beam and the lower fixed beam are parallel to each other and fixedly connected by the raking beam, the guide bar is parallel to the upper fixed beam and positioned at two sides of the upper fixed beam, the slide rail is fixedly connected at two sides of the lower fixed beam, and the roller of the traveling vehicle rolls in the slide rail.
3. The double-spreader electric crane according to claim 2, wherein the raker beams are staggered two by two in an X-shape.
4. The double-spreader electric crane according to claim 1, wherein the fixing rod comprises an outer rod sleeve, an inner push rod and a spring, the outer rod sleeve comprises a closed end and an open end, one end of the inner push rod extends into the outer rod sleeve from the closed end of the outer rod sleeve, the spring is arranged in the outer rod sleeve, one end of the spring is fixedly connected with the closed end of the outer rod sleeve, and the other end of the spring is fixedly connected with the end of the inner push rod.
5. The double-spreader electric crane according to claim 4, wherein a rubber pad block is fixedly connected to one end of the inner push rod positioned outside the outer rod sleeve.
6. The electric crane with double spreaders as claimed in claim 1, wherein the running vehicle further has a second longitudinal sliding slot, and the second connecting portion is slidably connected to the second longitudinal sliding slot.
7. The electric crane with double spreaders as claimed in claim 6, wherein the second longitudinal sliding slot has limiting ribs on both sides thereof, and the second connecting portion has limiting slots corresponding to the limiting ribs.
8. The double-spreader electric crane according to claim 1, wherein the driving mechanism comprises a stepping motor and a speed reducer connected with the stepping motor, the stepping motor is fixedly connected to the end of the main beam, and a power output shaft of the speed reducer is fixedly connected with one end of the main beam where the hinge rod is hinged.
CN202110284906.0A 2021-03-17 2021-03-17 Electric crane with double lifting appliances Active CN113060651B (en)

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CN113060651B CN113060651B (en) 2023-08-08

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