CN114084809A - Double-arm tower crane and multiplying power conversion method - Google Patents
Double-arm tower crane and multiplying power conversion method Download PDFInfo
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- CN114084809A CN114084809A CN202111376325.6A CN202111376325A CN114084809A CN 114084809 A CN114084809 A CN 114084809A CN 202111376325 A CN202111376325 A CN 202111376325A CN 114084809 A CN114084809 A CN 114084809A
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- Prior art keywords
- arm
- pulley
- boom
- hook
- steel wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/005—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with balanced jib, e.g. pantograph arrangement, the jib being moved manually
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/06—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/82—Luffing gear
Abstract
The invention discloses a double-arm tower crane and a multiplying power conversion method, belonging to the field of crane equipment; the device comprises: the tower comprises a base, a tower frame, a rotary tower body section, a balance arm and a crane boom; the tower crane comprises a tower crane frame, a rotary tower body section, a cargo boom, a balance arm and a tower crane, wherein the tower crane frame is fixedly connected to a base, the rotary tower body section is fixedly arranged at the top end of the tower crane frame, the cargo boom is fixedly arranged on the rotary tower body section, the balance arm is arranged on the rotary tower body section, and the cargo boom and the balance arm are symmetrically arranged by the rotary tower body section; four groups of hoisting mechanisms are arranged on the balance arm, and four groups of load-carrying vehicles are arranged on the crane arm; the lifting hook pulley blocks are respectively and fixedly installed on the four groups of load-carrying trolleys, and the four-to-sixteen multiplying power switching is achieved through assembling the lifting hook pulley blocks and the four groups of hoisting mechanism load-carrying trolleys in the hoisting process. Under the double-arm support, the four hoisting mechanisms and the two luffing mechanisms are used for controlling the corresponding load-carrying trolleys, so that the multiplying power switching and the moving speed adjustment in different modes can be realized, the double-arm support is suitable for multiple working conditions, and the flexibility of the whole machine operation is improved.
Description
Technical Field
The invention belongs to the field of crane equipment, and particularly relates to a double-arm tower crane and a multiplying power conversion method.
Background
The existing tower crane boom is a single boom, and a single-load truck and a single-hook form corresponding to the single boom device are the same, so that the hoisting speed is single, the hoisting capacity is limited, the flexibility of the crane operation is low, the application range is small, the multi-working-condition actual use requirements cannot be met, and the hoisting application range is further expanded.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a double-arm tower crane and a multiplying power conversion method.
The technical scheme is as follows: in a first aspect, the present invention provides a dual arm tower crane comprising:
a base, a tower frame fixedly connected on the base, a rotary tower body section fixedly arranged at the top end of the tower frame, and a jib assembly fixedly arranged on the rotary tower body section,
wherein, jib subassembly is double jib subassembly, includes: a first arm support and a second arm support;
the first arm support and the second arm support both comprise: two groups of balance arms and two groups of crane arms which are respectively and fixedly arranged at the top of the rotary tower body section and are symmetrically arranged;
four groups of lifting mechanisms arranged in front and at back are arranged on the two groups of balance arms
Four groups of load-carrying vehicles which are arranged in the front and back are arranged on the two groups of crane arms;
and hook pulley blocks are correspondingly arranged at the bottoms of the four groups of load-carrying vehicles.
In a further embodiment, the four sets of lifting mechanisms comprise: the lifting mechanism comprises a first lifting mechanism and a third lifting mechanism which are fixedly arranged on a first arm frame balance arm, and a second lifting mechanism and a fourth lifting mechanism which are fixedly arranged on a second arm frame balance arm.
In a further embodiment, the first hoisting mechanism, the second hoisting mechanism, the third hoisting mechanism and the fourth hoisting mechanism each comprise: the device comprises a mounting lug plate fixedly mounted at one end of a first arm support balance arm and a second arm support balance arm through a fixed pin shaft, a first motor group fixedly connected to the mounting lug plate, a first speed reducer in transmission connection with the output end of the first motor, a first steel wire reel group mounted on the mounting lug plate and in transmission with the output shaft of the first speed reducer through a coupler, an arm support pulley block which is sequentially attached to a steel wire extending from the first steel wire reel group and fixedly mounted on a first arm support and a second arm support, and a rotary tower body pulley fixedly mounted on a rotary tower body;
and a steel wire rope extending from the first steel wire winding drum group sequentially passes through an arm support pulley, a rotary tower body pulley, finally enters the truck to be wound and connected with a pulley in the truck, and then is transited to a hook pulley block through the truck pulley, and after the steel wire rope is wound from the hook pulley, the steel wire rope is fixed through an arm head anti-twisting device fixed at the other end of the first arm support crane boom and the second arm support crane boom.
In a further embodiment, the first wire reel set comprises: fixed connection is at the mounting bracket on the installation otic placode, and the transmission shaft on the bearing frame is run through to the bearing frame of symmetric connection at the mounting bracket both ends to and cup joint at the epaxial steel wire reel of transmission, the one end and the coupling joint of transmission shaft, and then under the drive of first motor, power drives the rotation of transmission shaft on the bearing frame through speed reducer, shaft coupling transmission to transmission shaft, finally realizes the rotation of steel wire reel.
In a further embodiment, a first brake and a second brake are respectively arranged in the first hoisting mechanism, the second hoisting mechanism, the third hoisting mechanism and the fourth hoisting mechanism, and the first brake is fixedly arranged at a power output end of the first motor; the second brake is fixedly arranged at the end of the transmission shaft.
In a further embodiment, the arm head anti-twist device comprises: the crane boom connecting device comprises a shell fixedly arranged on a crane boom, a cotter pin inserted in the shell, a connecting shaft screwed on the cotter pin and inserted with the shell, and a steel wire rope connecting ring arranged at the other end of the connecting shaft;
a bearing and a fastening bolt are arranged at the splicing position of the shell and the connecting shaft, the fastening bolt is in threaded connection with the shell, and the other end of the fastening bolt is abutted against the connecting shaft; and the steel wire rope penetrating out of the hook pulley block of the first steel wire winding drum group finally penetrates into the steel wire rope connecting ring and is locked in the steel wire rope connecting ring through the steel wire rope lock catch.
In a further embodiment, two luffing mechanisms are respectively fixedly mounted on the first boom and the second boom balance arm, and each luffing mechanism includes: the second motor is arranged on the bracket connected with the balance arm, the second speed reducer is arranged at the output shaft end of the first motor in a transmission way, and the second steel wire winding drum group is connected with the output shaft of the second speed reducer through a coupler and is fixedly arranged on the balance arm; the second steel wire winding drum group extends out of a front steel wire rope and a rear steel wire rope, one steel wire rope extends to the front end of the truck through the arm support pulley block, and the other steel wire rope passes through the balance arm pulley block and the rotary tower body pulley and extends to the rear end of the truck;
the second motor of the amplitude-changing mechanism drives the second steel wire reel group to rotate, so that the tensioning or loosening adjustment of a steel wire rope extending from the front end of the second steel wire reel group or a steel wire rope extending from the rear end of the second steel wire reel group is realized, and when the steel wire rope extending from the front end is in a tensioning state, the second motor of the amplitude-changing mechanism drives the truck to be pulled to the arm head of the arm support from the root of the first arm support or the second arm support; on the contrary, when the steel wire rope extending from the rear end is in a tensioning state, the second motor of the amplitude-changing mechanism drives the truck to be pulled to the root of the boom from the boom head of the first boom or the second boom, and the front rope and the rear rope of the truck are pulled to be tensioned or loosened through the amplitude-changing steel wire rope, so that amplitude-changing operation of the whole truck is realized, and the change of the hoisting position is met.
In a further embodiment, the front end and the rear end of the truck are both provided with a steel wire rope locker.
In a further embodiment, the load trolley comprises: the pulley frame is fixedly connected to the base, and the pulleys are arranged on the pulley frame; the movable travelling wheels are clamped in sliding grooves formed in the bottoms of the first arm support and the second arm support crane boom, and a steel wire rope extending from the first steel wire winding drum group of the lifting mechanism is connected with the hook pulley block in a winding mode through a pulley on the pulley frame.
In a further embodiment, the set of hook pulleys comprises: the inside hollow pulley yoke rotates two movable pulleys of installing in the pulley yoke through the bearing frame to and connect the lifting hook at the compensating beam other end through the fixed pin.
In a further embodiment, the pulley frame extends out of the steel wire rope to penetrate through the pulley seat, and the movable pulley is wound, so that the pulley seat ascends or descends along with the scaling of the steel wire rope extending out of the first steel wire reel set.
In a further embodiment, the pulley seat is further connected with a balance beam, the balance beam is in an isosceles triangle structure, and when two groups of trucks on the first boom or the second boom are arranged in front of and behind each other or front trucks and rear trucks on the first boom and the second boom are arranged in parallel, two isosceles ends of the balance beam are respectively connected with the bottom ends of the pulley seats corresponding to the two groups of trucks through connecting pins.
In a further embodiment, the hook is fixedly mounted at the bottom end point of the balance beam through a pin.
In a further embodiment, the hook comprises:
the hook body and the hook grooves are integrally connected to one end of the bottom of the hook body and are symmetrically arranged;
the hook groove is of an upward opening structure, and the top end of the hook body is provided with a mounting hole which is fixedly connected with the pulley seat or the balance beam through a pin shaft assembly.
In a second aspect, the present invention provides a magnification conversion method including the steps of:
multiplying power means the labor-saving multiplying power of the pulley block; the multiplying power of the simply connected pulley block is equal to the number of the steel wire rope branches, the four multiplying powers are that four steel wire ropes exist on a single pulley block, sixteen steel wire ropes exist on four pulley blocks integrally, namely sixteen multiplying powers integrally, and the number of the steel wire ropes corresponds to the corresponding multiplying power number.
A four-time hoisting operation method of a hook pulley block comprises the following steps:
when the load-carrying vehicle on the crane arm of the first arm support or the second arm support is not directly connected with the hook component through the balance beam, the first motor group of a single lifting mechanism is started to drive the first steel wire rope reel set to rotate so as to contract or release the extended steel wire rope, and the extended steel wire rope is further wound by two of an arm support pulley, a rotary tower body pulley, a pulley frame in the load-carrying vehicle and a hook pulley block in a sliding manner in sequence, so that the lifting action of a lifting hook connected to the other end of the pulley block is finally realized, and the quadruple rate operation mode of the single crane arm support lifting hook of the first arm support or the second arm support is realized;
the eight-fold hoisting operation method of the hook pulley block comprises the following steps:
when the two isosceles ends of the balance beam are respectively connected with the load-carrying vehicles arranged on the front and back of the first boom or the second boom through the connecting pin shafts by the load-carrying vehicle on the first boom or the second boom and the bottom pulley seats of the load-carrying vehicles arranged on the first boom and the second boom in parallel, the lifting mechanisms arranged on the front and back of the same balance arm or the lifting mechanisms arranged on the two groups of balance arms in parallel are started, so that the hook pulley blocks under the two load-carrying vehicles arranged on the front and back of the single boom or the two load-carrying vehicles arranged in parallel act together, and the hook is lifted at the speed of eight times;
a lifting operation method with sixteen multiplying power of a hook pulley block comprises the following steps:
the four groups of hook pulley blocks are connected through the plurality of balance beams or the four groups of hook pulley blocks are used for hanging and carrying at different positions of the same load material, and the four lifting mechanisms on the first arm support and the second arm support balance arm are started, so that the corresponding four load-carrying vehicles jointly act on the hook pulley blocks, and the hooks enter the same load material to lift at sixteen times.
Has the advantages that: compared with the prior art, the invention has the following advantages:
1. through the parallel arrangement of the double arm supports, the front and the rear double-load-carrying vehicles are arranged on each arm support, the double-load-carrying vehicles can work independently, the combined work of the double arms and the four-load-carrying vehicles can be realized, and the work form is flexible.
2. The four trucks are respectively controlled by four hoisting mechanisms, and the hoisting mechanisms can operate independently and jointly.
3. The four pulley blocks on the lifting hooks can be used for synchronously lifting four lifting hooks of the four-load vehicle and can also be used for lifting a single-pulley-block single-load vehicle, different positions are connected through the hook heads of the lifting hooks, the switching of different multiplying powers of the whole machine is realized, the structure is simplified, and the equipment cost and the maintenance cost are reduced.
Drawings
FIG. 1 is a schematic structural view of a dual-arm tower crane of the present invention;
FIG. 2 is a top view of the dual arm tower crane of the present invention;
fig. 3 is a schematic structural diagram of a lifting mechanism driving end of the invention;
FIG. 4 is a schematic structural view of the drive end of a luffing mechanism of the present invention;
FIG. 5 is a schematic structural view of the drive end of the luffing mechanism of the present invention;
FIG. 6 is a schematic structural view of a transmission end of a hoisting mechanism of the present invention;
FIG. 7 is an illustration of an embodiment of a hook block assembly of the present invention;
FIG. 8 is an illustration of an embodiment of the invention in which a tandem truck is assembled with a corresponding set of hook pulleys;
fig. 9 is an illustration of an embodiment of the present invention with a single truck assembled with a corresponding set of hook pulleys.
FIG. 10 is a schematic view of the construction of the anti-twist device of the present invention; .
Reference numerals: the crane comprises a base 1, a tower crane frame 2, a rotary tower body section 3, an arm frame assembly 5, a first arm frame 50, a cargo boom 50a, a balance arm 50b, a luffing mechanism 50c, a second motor 500, a second speed reducer 501, a second steel wire reel set 502, a balance arm pulley block 503, a steel wire locker 504, a second arm frame 51, a first hoisting mechanism 52, a mounting lug plate 520, a first motor set 521, a first speed reducer 522, a first steel wire reel set 523, a mounting rack 5230, a bearing seat 5231, a transmission shaft 5232, a steel wire reel 5233, an arm pulley block 524, a rotary tower body pulley 525, a first brake 526, a second brake 527, a second hoisting mechanism 53, a third hoisting mechanism 54, a fourth hoisting mechanism 55, a truck 56, a base 560, a plurality of groups of movable travelling wheels 561, a pulley frame 562, a lifting hook pulley block 58, a pulley block 580, a movable pulley, a lifting hook 582, a hook body 5820, a hook groove 5821, a balance beam 583, The anti-twist device 6, the shell 60, the split pin 61, the connecting shaft 62, the connecting ring 63 and the fastening bolt 64.
Detailed Description
In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and illustrated with reference to the following specific embodiments, but not limited thereto.
The existing tower crane boom is a single boom, and a single-load truck and a single-hook form corresponding to the single boom device are the same, so that the hoisting speed is single, the hoisting capacity is limited, the flexibility of the crane operation is low, the application range is small, the multi-working-condition actual use requirements cannot be met, and the hoisting application range is further expanded.
A dual arm tower crane as shown in figures 1 to 9 comprising: the crane comprises a base 1, a tower crane frame 2, a revolving tower body section 3, an arm frame assembly 5, a first arm frame 50, a second motor 500, a second speed reducer 501, a second steel wire reel set 502, a balance arm pulley set 503, a steel wire rope locker 504, a second arm frame 51, a first lifting mechanism 52, a mounting lug plate 520, a first motor set 521, a first speed reducer 522, a first steel wire reel set 523, a mounting frame 5230, a bearing seat 5231, a transmission shaft 5232, a steel wire reel 5233, an arm frame pulley set 524, a revolving tower body pulley 525, a first brake 526, a second brake 527, a second lifting mechanism 53, a third lifting mechanism 54, a fourth lifting mechanism 55, a load vehicle 56, a base 560, a plurality of groups of movable traveling wheels 561, a pulley frame 562, a lifting hook pulley set 58, a pulley seat 580, a movable pulley 581, a lifting hook 582, a hook body 5820, a hook groove 5821, a balance beam 583 and an anti-twist device 6.
The tower crane comprises a base 1, a tower frame 2, a rotary tower body section 3, an arm support assembly 5 and a tower crane body section, wherein the tower frame 2 is fixedly connected to the base 1;
the arm frame assembly 5 includes: a first arm 50 and a second arm 51;
the first arm support 50 and the second arm support 51 each include: two groups of balance arms 50b and two groups of crane arms 50a which are respectively and fixedly arranged at the top of the revolving tower body section 3 and are symmetrically arranged;
four groups of hoisting mechanisms arranged in front and at the back are arranged on the two groups of balance arms 50b
Four sets of trucks 56 arranged in the front and rear are mounted on the two sets of crane arms 50 a;
the bottom of the four groups of trucks 56 are correspondingly provided with a hook 582 and a pulley block 58.
Four groups hoisting mechanism include: a first lifting mechanism 52, a second lifting mechanism 53, a third lifting mechanism 54, and a fourth lifting mechanism 55.
The first lifting mechanism 52 and the third lifting mechanism 54 are fixedly arranged on the balance arm 50b of the first arm frame 50, and the second lifting mechanism 53 and the fourth lifting mechanism 55 are fixedly arranged on the balance arm 50b of the second arm frame 51.
The first lifting mechanism 52, the second lifting mechanism 53, the third lifting mechanism 54, and the fourth lifting mechanism 55 each include: the mounting lug plate 520, the first motor group 521, the first speed reducer 522, the first wire reel 5233 group 523, the mounting frame 5230, the bearing seat 5231, the transmission shaft 5232, the wire reel 5233, the arm support pulley block 524, the rotary tower pulley 525, the first brake 526 and the second brake 527.
The device comprises a mounting lug plate 520 fixedly mounted on two groups of balance arms 50b of a first arm support 50 and a second arm support 51 through a fixed pin shaft, a first motor group 521 fixedly connected to the mounting lug plate 520, a first speed reducer 522 in transmission connection with the output end of the first motor, a first steel wire reel 5233 group 523 mounted on the mounting lug plate 520 and in transmission with the output shaft of the first speed reducer 522 through a coupler, an arm support pulley block 524 sequentially attached to a steel wire rope extending from the first steel wire reel 5233 group 523 and fixedly mounted on the first arm support 50 and the second arm support 51, and a rotary tower pulley 525 fixedly mounted on the rotary tower;
and a strand of steel wire rope extending from the group 523 of the first wire drums 5233 sequentially passes through a pulley of the boom, a pulley 525 of the rotary tower body, finally enters the truck 56 to be wound and connected with the pulley in the truck 56, and then transits to the pulley block 58 of the lifting hook 582 through the pulley of the truck 56, and after the steel wire rope is wound from the pulley of the lifting hook 582, the steel wire rope is fixed through the boom head anti-twisting device 6 fixed at the end of the boom 50a on the first boom 50 and the second boom 51.
The first wire drum 5233 set 523 comprises: fixed connection is at the mounting bracket 5230 on installation otic placode 520, the bearing frame 5231 at mounting bracket 5230 both ends is connected to the symmetry, run through transmission shaft 5232 on bearing frame 5231 to and cup joint steel wire reel 5233 on transmission shaft 5232, the one end and the coupling joint of transmission shaft 5232, and then under the drive of first motor, power is through the speed reducer, the shaft coupling transmits to transmission shaft 5232 on, drive transmission shaft 5232 the rotation on bearing frame 5231, finally realize steel wire reel 5233's rotation.
The first lifting mechanism 52, the second lifting mechanism 53, the third lifting mechanism 54 and the fourth lifting mechanism 55 are respectively provided with a first brake 526 and a second brake 527, and the first brake 526 is fixedly arranged at the power output end of the first motor; a second stopper 527 is fixedly mounted on the end of the transmission shaft 5232.
As shown in fig. 10, the arm head torsion preventing apparatus 6 includes: a shell 60 fixedly installed on the crane boom 50a, a cotter pin 61 inserted in the shell 60, a connecting shaft 62 screwed on the cotter pin 61 and inserted in the shell 60, and a wire rope connecting ring 63 provided at the other end of the connecting shaft 62;
the joint of the housing 60 and the connecting shaft 62 is provided with a bearing and a fastening bolt 64. The fastening bolt 64. Bolts 64 are screwed and fastened to the housing 60. And the other end thereof abuts against the connecting shaft 62. The steel wire rope which passes out of the hook 582 and the pulley block 58 from the first wire drum 5233 group 523 finally passes through the steel wire rope connecting ring 63 and is locked in the steel wire rope connecting ring 63 by the steel wire rope lock catch.
Two luffing mechanisms 50c are respectively and fixedly mounted on the first boom 50 and the second boom 51 and the balance arm 50b, and each luffing mechanism 50c comprises: a second motor 500, a second speed reducer 501, and a second wire reel 5233 group 502;
the second motor 500 is mounted on the bracket connected with the balance arm 50b, the second speed reducer 501 is mounted at the output shaft end of the first motor in a transmission way, and the second wire winding drums 5233 group 502 is fixedly mounted on the balance arm 50b through the shaft coupling and the output shaft of the second speed reducer 501; a front steel wire rope and a rear steel wire rope extend from the second steel wire winding drums 5233 group 502, one of the steel wire ropes extends to the front end of the truck 56 through the arm support pulley block 524, and the other steel wire rope passes through the balance arm pulley block 503 and the rotary tower body pulley 525 to transition and extends to the rear end of the truck 56;
the second motor 500 in the luffing mechanism 50c drives the second wire reel 5233 group 502 to rotate, so that the tensioning or relaxation adjustment of the steel wire rope extending from the front end of the second wire reel 5233 group 502 or the steel wire rope extending from the rear end is realized, and when the steel wire rope extending from the front end is in a tensioning state, the luffing mechanism 50c drives the truck 56 to be pulled to the boom head from the root of the first boom 50 or the second boom 51 by the second motor 500; on the contrary, when the steel wire rope extending from the rear end is in a tensioned state, the second motor 500 of the luffing mechanism 50c drives the truck 56 to be pulled from the arm head of the first arm support 50 or the second arm support 51 to the root of the arm support, and the front rope and the rear rope of the truck 56 are tensioned or loosened through the luffing steel wire rope, so that the luffing operation of the truck 56 of the whole machine is realized, and the change of the hoisting position is met.
The front and rear ends of the truck 56 are provided with wire rope lockers 504.
The load dolly includes: a base 560, a plurality of sets of moving road wheels 561 fixedly mounted on the base 560, a pulley holder 562 fixedly connected to the base 560, and a pulley mounted on the pulley holder 562; the movable travelling wheels are clamped in sliding grooves formed in the bottoms of the crane arms 50a of the first arm support 50 and the second arm support 51, and a steel wire rope extending from the first wire winding drum 5233 group 523 of the hoisting mechanism is wound and connected with the lifting hook 582 pulley block 58 through pulleys on the pulley bracket 562.
The cable extended from the pulley frame 562 passes through the pulley seat 580 and the movable pulley 581 is wound, so that the pulley seat 580 ascends or descends along with the scaling of the cable extended from the first cable drum 5233 set 523.
The pulley seat 580 is further connected with a balance beam 583, the balance beam 583 is in an isosceles triangle structure, and when two groups of trucks 56 on the boom 50a of the first boom 50 or the boom 51 of the second boom 51 are arranged in front and at the back or the front truck 56 and the rear truck 56 on the boom 50a of the first boom 50 and the boom 51 are arranged in parallel, two isosceles ends of the balance beam 583 are respectively connected with the bottom ends of the pulley seats 580 corresponding to the two groups of trucks 56 through connecting pins.
The hook 582 is fixedly attached to the bottom end of the equalizer bar 583 by a pin.
The hook 582 includes: a hook body 5820 and hook grooves 5821 which are integrally connected with one end of the bottom of the hook body 5820 and are symmetrically arranged;
the hook groove 5821 is of an upward opening structure, and the top end of the hook body 5820 is provided with a mounting hole fixedly connected with the pulley seat 580 or the balance beam 583 through a pin shaft assembly.
The working principle is as follows:
the second motor 500 drives the second wire drum 5233 group 502 to rotate through the luffing mechanism 50c, so that the tensioning or loosening adjustment of the steel wire rope extending from the front end or the rear end of the second wire drum 5233 group 502 is realized, and when the steel wire rope extending from the front end is in a tensioning state, the luffing mechanism 50c drives the truck 56 to be pulled to the boom head from the root of the first boom 50 or the second boom 51 by the second motor 500; on the contrary, when the steel wire rope extending from the rear end is in a tensioned state, the second motor 500 of the luffing mechanism 50c drives the truck 56 to be pulled from the head of the boom 50a of the first boom 50 or the second boom 51 to the root of the boom 50a, and the front and rear ropes of the truck 56 are pulled to be tensioned or loosened through the luffing steel wire rope, so that the luffing operation of the truck 56 of the whole machine is realized, and the change of the hoisting position is met.
The first motor is driven, power is transmitted to the speed reducer and the coupler through the output end of the first motor and finally transmitted to the transmission shaft 5232, so that the transmission shaft 5232 is driven to rotate on the bearing block 5231, and the rotation of the steel wire winding drum 5233 is finally realized; the cable extended from the pulley frame 562 passes through the pulley seat 580 and the movable pulley 581 is wound, so that the pulley seat 580 ascends or descends along with the scaling of the cable extended from the first cable drum 5233 set 523.
The linkage mode of the hoisting mechanism, the truck 56 and the lifting hook 582 and the pulley block 58 is assembled and changed according to various working conditions in the operation process.
When the hoisting load is smaller in tonnage, a quadruple hoisting operation method is adopted:
when the load-carrying vehicle 56 on the boom 50a of the first boom 50 or the second boom 51 is not directly connected with the hook 582 component through the balance beam 583, the first motor group 521 of a single hoisting mechanism is started to drive the first steel wire rope reel set to rotate, so that the extended steel wire ropes are contracted or expanded, and further pass through the boom pulley, the rotary tower body pulley 525, the pulley frame 562 in the load-carrying vehicle 56 and two of the hook 582 pulley blocks 58 to be wound in a sliding manner, and finally the lifting effect on the hook 582 connected to the other end of the pulley block 580 is realized, so that the quadruple rate operation mode of the hook 582 of the single boom 50a of the first boom 50 or the second boom 51 is realized;
when the hoisting load is moderate, an eight-time hoisting operation method is adopted:
when the two isosceles ends of the balance beam 583 are respectively connected with the load-carrying vehicles 56 arranged on the front and back of the boom 50a of the first boom 50 or the second boom 51 and the bottom pulley seats 580 of the load-carrying vehicles 56 arranged on the boom 50a of the first boom 50 or the second boom 51 in parallel through the connecting pin shafts by the load-carrying vehicles 56 on the boom 50a of the first boom 50 or the second boom 51 by the connecting pin shafts, the load-carrying vehicles 56 arranged on the front and back of the single boom 50a and the load-carrying vehicles 56 arranged on the two groups of the balance arms 50b in parallel are enabled to jointly act as the lifting hook 582 pulley block 58 by starting the lifting mechanisms arranged on the same balance arm 50b in front and back or the lifting mechanisms arranged in parallel on the two groups of the balance arms 50b in parallel, so that the lifting hook 582 is lifted at the speed of eight times;
when the hoisting load is large in tonnage, a sixteen-magnification hoisting operation method is adopted:
the four groups of lifting hooks 582 and pulley blocks 58 are connected through the balance beams 583 or the four groups of lifting hooks 582 and pulley blocks 58 are used for lifting different positions of the same heavy material, the four lifting mechanisms on the balance arms 50b of the first arm support 50 and the second arm support 51 are started, the corresponding four load-carrying vehicles 56 are enabled to act on the lifting hooks 582 and pulley blocks 58 together, and then the lifting hooks 582 lift the same heavy material in sixteen-rate. In the mode, the hoisting weight is maximum, the hoisting speed and the amplitude variation speed are low, and the integral inertia impact of the device is reduced;
according to the invention, through the parallel arrangement of the double arm supports, the front and rear double trucks 56 are arranged on each arm support, the double trucks 56 can work independently, and the combined work of the double arms four trucks 56 can be realized, so that the work form is flexible. The four trucks 56 are controlled by four lifting mechanisms, respectively, which can operate independently or together. Four assembly pulleys on the lifting hook 582 can be synchronously hoisted by four lifting hooks 582 of a four-load vehicle 56, and can be hoisted by a single-assembly-pulley single-load vehicle 56, different positions are connected by the hook head of the lifting hook 582, so that the switching of different multiplying powers of the whole machine is realized, and for customers, a small hook head can be reduced on the whole, and the customer management and the use are facilitated.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (15)
1. A dual arm tower crane comprising:
a base, a tower frame fixedly connected on the base, a rotary tower body section fixedly arranged at the top end of the tower frame, and a jib assembly fixedly arranged on the rotary tower body section,
wherein, jib subassembly is double jib subassembly, includes: a first arm support and a second arm support;
the first arm support and the second arm support both comprise: two groups of balance arms and two groups of crane arms which are respectively and fixedly arranged at the top of the rotary tower body section and are symmetrically arranged;
four groups of lifting mechanisms arranged in front and at back are arranged on the two groups of balance arms
Four groups of load-carrying vehicles arranged in front and at the back are arranged on the two groups of crane arms;
and hook pulley blocks are correspondingly arranged at the bottoms of the four groups of load-carrying vehicles.
2. A dual arm tower crane according to claim 1 wherein said four sets of hoisting mechanisms comprise: the lifting mechanism comprises a first lifting mechanism and a third lifting mechanism which are fixedly arranged on a first arm frame balance arm, and a second lifting mechanism and a fourth lifting mechanism which are fixedly arranged on a second arm frame balance arm.
3. A dual arm tower crane according to claim 2 wherein each of said first, second, third and fourth hoisting mechanisms comprises: the device comprises a mounting lug plate fixedly mounted at one end of a first arm support balance arm and one end of a second arm support balance arm through a fixed pin shaft, a first motor group fixedly connected to the mounting lug plate, a first speed reducer in transmission connection with the output end of the first motor, a first steel wire reel group mounted on the mounting lug plate and in transmission with the output shaft of the first speed reducer through a coupler, an arm support pulley block sequentially attached to a steel wire extended from the first steel wire reel group and fixedly mounted on the first arm support and the second arm support, and a rotary tower body pulley fixedly mounted on a rotary tower body;
and a steel wire rope extending from the first steel wire winding drum group sequentially passes through an arm support pulley, a rotary tower body pulley, finally enters the truck to be wound and connected with a pulley in the truck, and then is transited to a hook pulley block through the truck pulley, and after the steel wire rope is wound from the hook pulley, the steel wire rope is fixed through an arm head anti-twisting device fixed at the other end of the first arm support crane boom and the second arm support crane boom.
4. A dual arm tower crane according to claim 3 wherein said first wire reel set comprises: fixed connection is at the mounting bracket on the installation otic placode, and the transmission shaft on the bearing frame is run through to the bearing frame of symmetric connection at the mounting bracket both ends to and cup joint at the epaxial steel wire reel of transmission, the one end and the coupling joint of transmission shaft, and then under the drive of first motor, power drives the rotation of transmission shaft on the bearing frame through speed reducer, shaft coupling transmission to transmission shaft, finally realizes the rotation of steel wire reel.
5. A double-arm tower crane according to claim 3, wherein the first hoisting mechanism, the second hoisting mechanism, the third hoisting mechanism and the fourth hoisting mechanism are respectively provided with a first brake and a second brake, and the first brake is fixedly arranged at the power output end of the first motor; the second brake is fixedly arranged at the end of the transmission shaft.
6. A dual arm tower crane according to claim 3 wherein said arm head anti-twist means comprises: the crane boom connecting device comprises a shell fixedly arranged on a crane boom, a cotter pin inserted in the shell, a connecting shaft screwed on the cotter pin and inserted with the shell, and a steel wire rope connecting ring arranged at the other end of the connecting shaft;
the connecting shaft is connected with the shell through a bolt, and the shell is connected with the connecting shaft through a bolt.
7. The dual-arm tower crane according to claim 1, wherein two luffing mechanisms are respectively fixedly mounted on the first boom and the second boom balance arm, and each luffing mechanism comprises: the second motor is arranged on the bracket connected with the balance arm, the second speed reducer is arranged at the output shaft end of the first motor in a transmission way, and the second steel wire winding drum group is connected with the output shaft of the second speed reducer through a coupler and is fixedly arranged on the balance arm; and the second steel wire winding drum group extends to form a front steel wire rope and a rear steel wire rope, one steel wire rope extends to the front end of the truck through the arm support pulley block, and the other steel wire rope passes through the balance arm pulley block and the rotary tower body pulley to be in transition and extends to the rear end of the truck.
8. A dual arm tower crane according to claim 7 wherein cable retainers are provided at both the front and rear ends of the truck.
9. A dual arm tower crane according to claim 2, wherein said load trolley comprises: the pulley frame is fixedly connected to the base, and the pulleys are arranged on the pulley frame; the movable travelling wheels are clamped in sliding grooves formed in the bottoms of the first arm support and the second arm support crane boom, and a steel wire rope extending from the first steel wire winding drum group of the lifting mechanism is connected with the hook pulley block in a winding mode through a pulley on the pulley frame.
10. A dual arm tower crane according to claim 1 wherein said hook block assembly comprises: the inside hollow pulley yoke rotates two movable pulleys of installing in the pulley yoke through the bearing frame to and connect the lifting hook at the compensating beam other end through the fixed pin.
11. A dual arm tower crane according to claim 10, wherein the cable extending from the pulley yoke passes through the pulley block and the movable pulley is wound so that the pulley block is raised or lowered in response to the extension and retraction of the cable extending from the first wire reel set.
12. A double-arm tower crane according to claim 10, wherein the pulley holder is further connected with a balance beam, the balance beam is in an isosceles triangle structure, and when two sets of trucks on the first boom or the second boom are respectively arranged in front of and behind each other or front truck and rear truck on the first boom and the second boom are arranged in parallel, two isosceles ends of the balance beam are respectively connected with the bottom ends of the pulley holders corresponding to the two sets of trucks through connecting pins.
13. A dual arm tower crane according to claim 12 wherein said hook is fixedly mounted to the bottom end of said equalizer bar by a pin.
14. A dual arm tower crane according to claim 9 or 10, wherein the hook comprises:
the hook body and the hook grooves are integrally connected to one end of the bottom of the hook body and are symmetrically arranged;
the hook groove is of an upward opening structure, and the top end of the hook body is provided with a mounting hole which is fixedly connected with the pulley seat or the balance beam through a pin shaft assembly.
15. A multiplying power conversion method of a double-arm tower crane is characterized by comprising the following steps:
a four-time hoisting operation method of a hook pulley block comprises the following steps:
when the load-carrying vehicle on the first arm support or the second arm support crane boom is not directly connected with the hook component through the balance beam, the first motor group of a single hoisting mechanism is started to drive the first steel wire rope reel set to rotate, so that the extended steel wire rope is contracted or expanded, and the first steel wire rope reel set sequentially passes through two sliding windings in an arm support pulley, a rotary tower body pulley, a pulley frame in the load-carrying vehicle and a hook pulley block, so that the lifting effect of a hook connected to the other end of a pulley seat is finally realized, and the quadruple rate operation mode of the single crane boom hook of the first arm support or the second arm support is realized;
the eight-fold hoisting operation method of the hook pulley block comprises the following steps:
when the two isosceles ends of the balance beam are respectively connected with the front and rear loaders arranged on the first boom or the second boom and the bottom pulley seats of the loaders arranged on the first boom and the second boom in parallel through the connecting pin shafts by the loaders on the first boom or the second boom, the hoisting mechanisms arranged in front and rear of the same balance arm or the hoisting mechanisms arranged in parallel on two groups of balance arms are started, so that the hook pulley blocks under the two corresponding front and rear loaders on the single boom or the two parallel loaders on the double boom act together, and the hook is lifted at the speed of eight times;
a lifting operation method with sixteen multiplying power of a hook pulley block comprises the following steps:
the four groups of hook pulley blocks are connected through the plurality of balance beams or the four groups of hook pulley blocks are used for hanging and carrying at different positions of the same load material, and the four lifting mechanisms on the first arm support and the second arm support balance arm are started, so that the corresponding four load-carrying vehicles jointly act on the hook pulley blocks, and the hooks enter the same load material to lift at sixteen times.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111376325.6A CN114084809A (en) | 2021-11-19 | 2021-11-19 | Double-arm tower crane and multiplying power conversion method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111376325.6A CN114084809A (en) | 2021-11-19 | 2021-11-19 | Double-arm tower crane and multiplying power conversion method |
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| CN114084809A true CN114084809A (en) | 2022-02-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180531A (en) * | 2022-07-29 | 2022-10-14 | 徐州建机工程机械有限公司 | Spatial layout structure for non-twisting of tower crane hoisting steel wire rope |
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