CN115367634A

CN115367634A - Crane capable of automatically unhooking

Info

Publication number: CN115367634A
Application number: CN202110545865.6A
Authority: CN
Inventors: 杨清标
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-11-22

Abstract

The invention provides a crane capable of automatically unhooking, which comprises a clamping and positioning device fixed on a cross beam of a house and a cantilever combined with the clamping and positioning device, wherein the crane further comprises a control tower movably combined with the cantilever, the control tower can be limited and positioned by a hook plate pivoted on the cantilever and cannot move along the cantilever, when the control tower cannot move along the cantilever, a steel cable is reeled or released to control the height of a hung object, the steel cable is reeled or released to allow the hook plate to automatically unhook the control tower so as to move along the cantilever, and in the state that the control tower can move along the cantilever, a reeling steel cable system is linked with the displacement of the control tower, and the height of the reeled or released steel cable for the hung object cannot change.

Description

Crane capable of automatically unhooking

Technical Field

The invention relates to a crane, in particular to a crane mobile machine which can lift a ground heavy object to any floor height and move the lifted heavy object into a room by a mobile pulley.

Background

Various high-rise hanging bracket and crane structures are known, in which a cantilever is clamped and positioned on a parapet of a top floor by various clamping components, so that the cantilever protrudes out of the parapet, a steel cable capable of lifting and sliding is arranged at the front end of the cantilever, a lifting hook is arranged at one end of the steel cable, and the other end of the steel cable is connected with a hoisting rotary power device. Thus, the heavy object on the ground can be hung on the lifting hook of the steel cable, then the lifting rotary power device on the ground is started to pull the steel cable, the heavy object is lifted to the top floor position, and the suspension arm is rotated to the top floor, so that the heavy object is lifted off the ground and placed on the top floor for unloading. However, when finishing work is performed on floors on different floors, the floor may not be used because of the situation that the site has no short wall for clamping and erecting. Or because the two sides of each layer of window of non-top floor are all walls, even if the high-rise hanger and the crane in the above form can be arranged on the short wall of the window, the existing outer wall can block the rotation of the cantilever, and the cantilever for lifting the heavy object cannot be rotated into the floor of the floor, so that the common high-rise hanger and crane structure is only suitable for lifting the heavy object on the ground to the top floor of the building, and the heavy object on the ground cannot be lifted and moved into each floor chamber of the house, thereby causing the inconvenience of taking materials for the non-top floor construction.

Disclosure of Invention

In order to solve the above problems, the present invention provides a crane capable of automatically unhooking, comprising: a cantilever, a hook plate pivoted on the cantilever and pivotable to a hooking position or a unhooking position, a control tower movably coupled to the cantilever and including a stop rod and a guide pulley coupled to the hook plate, a link slider displaceable to a retreating position, an advancing position or a preparatory position, the control tower further including an unhooking member pivotally coupled to the link slider, the control tower being immovable along the cantilever when the hook plate is in the hooking position and coupled to the stop rod, the control tower being movable along the cantilever when the hook plate is in the unhooking position or decoupled from the stop rod, a link including a coupling end and a distal end coupled to the hook plate, a steel cable passing through the control tower and abutting against the guide pulley, a hook, the steel cable rope linkage locking device comprises a steel cable rope, a locking block and a linkage sliding block, wherein the locking block is combined at one tail end of the steel cable rope and is close to a lifting hook, the steel cable rope linkage locking block is rolled up or released to be displaced, the locking block can be displaced to a lifting position, a resisting position, a releasing position or a resetting position, when the locking block is positioned at the lifting position, the linkage sliding block is positioned at a preparation position, a unhooking member is separated from the tail end of a connecting rod, a hook plate is positioned at a hooking position and is combined with a stop lever, when the locking block is positioned at the resisting position, the linkage sliding block is displaced to a forward position, the unhooking member is combined with the tail end of the connecting rod, the hook plate is positioned at the hooking position and is combined with the stop lever, when the locking block is positioned at the resisting position, the hook plate is positioned at the unhooking position and is separated from the stop lever, the control tower can move along the cantilever, and when the locking block is positioned at the resetting position, the linkage sliding block is located at a retreating position, the unhooking component is separated from the tail end of the connecting rod, the hook plate is located at one of a hooking position and a blocking rod in combination or separation, and when the clamping block is displaced from a resetting position to a lifting position, the linkage sliding block is displaced to a preparation position.

The control tower of the crane achieves the purpose that the suspension operation which cannot move relative to the cantilever but can change the height of the weight into the movement operation which cannot change the height of the weight but can move relative to the cantilever by retracting or releasing the steel cable through the arrangement of the linkage sliding block, the unhooking member and the connecting rod, and has better convenience in use.

The automatically unhooking crane, wherein the control tower further comprises:

a blocking device comprising a pin that moves to an extended position or a retracted position, the pin being in the extended position to position the ganged slide in the retracted position when the ganged slide is in the retracted position, the pin being in the retracted position to allow the ganged slide to move when the ganged slide is in the advanced or ready position.

The crane capable of automatically unhooking, wherein the control tower further comprises:

rotatable release, including a release plectrum and a flange, the bolt still include with a passive portion that the flange interlock ground combined, when the pawl piece is by the position displacement of resetting to the lift position, the pawl piece supports and presses the release plectrum makes the release pivot, the flange supports and presses passive portion displacement, the bolt is from stretching out the displacement of position to the position of contracting inwards.

The crane capable of automatically unhooking, the control tower further comprises: the movable control slide block comprises a pressing part, the clamping block moves to a releasing position, a pressing position or a resetting position and is linked with the control slide block to move together, and the rotatable resetting piece comprises a first extending part and a second extending part.

But hoist of automatic unhook, the control slider still includes an extension arm, the clamping block supports and presses the extension arm promotes the control slider displacement, the interlock slider supports when being located the preparation position and supports on the extension arm.

The crane capable of automatically unhooking comprises an extension arm and a linkage slide block, wherein the extension arm comprises a horizontal part and a vertical part connected to the tail end of the horizontal part, the clamping block pushes the control slide block to move by abutting against the horizontal part of the extension arm, and the linkage slide block abuts against the vertical part of the extension arm when located at a preparation position.

The crane capable of automatically unhooking comprises a unhooking component, wherein the unhooking component further comprises a pressing plate which pivots together, the pressing plate comprises an opening corresponding to the notch, when the linkage sliding block is located at a retreating position or a preparation position, the pressing plate is located on the outer side of a moving path of the clamping block, when the linkage sliding block is located at a forward position, the pressing plate is located on the moving path of the clamping block, and when the clamping block is located at a pressing position, the clamping block presses the pressing plate to enable the unhooking component to pivot.

The automatically unhooked crane, the control tower comprising: the linkage sliding block is combined with the linkage rail in a sliding mode, the linkage sliding block further comprises an installation part, a pull handle which is combined with the support in a sliding mode, the tail end of the pull handle is combined with the installation part of the linkage sliding block, a pushing spring is sleeved on the outer side of the pull handle and located between the installation part and the support, and the pushing spring biases the linkage sliding block towards the advancing position.

The crane capable of automatically unhooking comprises a control tower and is characterized in that the control tower comprises a lower opening, the clamping block can be displaced between a lifting position and a releasing position through the lower opening, when the linkage sliding block is located at a forward position, the clamping block is located above the linkage sliding block, the lower opening is sealed by the linkage sliding block, and the clamping block cannot be displaced to the lifting position.

Through the technical characteristics that the lower opening is closed when the linkage sliding block is moved to the advancing position, and the clamping block is positioned above the linkage sliding block, when the crane is moved, the suspended heavy object can not fall off due to the loosening of the steel cable, and the crane has better safety in use.

The present invention will become more apparent from the detailed description given herein of illustrative embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

FIG. 1 is an exploded perspective view of a control tower.

Fig. 2 is a perspective assembly view of the control tower installed into the cantilever.

Fig. 3 is a perspective assembly view of the crane.

Fig. 4 is a side view of the crane.

Fig. 5 is an enlarged view of the control tower.

Fig. 6 is a cross-sectional view taken along line 6-6 of fig. 3.

FIG. 7 is a state diagram of the control tower with the latch dog in the release position.

FIG. 8 is a state diagram of the control tower with the detent block in the pressing position.

FIG. 9 is a state diagram of the control tower with the latch in the reset position.

FIG. 10 is a state diagram of the control tower displaced to the second end of the cantilever.

FIG. 11 is a state diagram of the release member linked to the movement of the locking block of the control tower from the return position to the lifting position.

Description of the reference numerals: 11, a crane; 20 clamping and positioning the device; 22 a base; 24 a first portion; 26. a second portion; 27 a fixing member; 28 clamping the space; 30 fixing frames; 32 a positioning member; 34 a chuck; 36 a shift lever; 41 wire devices; 42 hooks; 43 steel wires; 44 a cantilever arm; 45 a first end 46; a first baffle plate; 47 a second end; 48 a second baffle; a 50A first hook; a 50B second hook; 52 a hollow channel; 54 through grooves; 56 wing plates; 64 hook plates; 65A first spring; 66 hook parts; 67 control tower; 68 a pulley; 69 a positioning spring; 72 bottom part; 74 wheels; 76 a stop lever; 78 a cross beam; 131 a guide pulley; 310 a suspension device; 311 steel cables; 313 hook; 315 a clamping block; 419 controlling the slide block; 431 pressing part; 433 a movable joint part; 435 an extension arm; 437. a gap; 439 an indicator; 451 linking the slider; 453 notch; 455 a pivot joint; 457 mounting part; 459 a unhooking member; 471 a pivot joint end; 473 outer end; 475 pressing plate; 477 opening; 511a bracket; 511A end cap; 511B control the track; 511C bottom end; 511D perforation; 511E a first return spring; 512 lower opening; 513. an upper end; 515, lower end; 516 securing the joint; 517 space; 519 linking the tracks; 531 homing element; 533. a first extension portion; 535 a second extension; 537 release member; 539 releasing a paddle; a 551 flange; 553 lugs; 555 second return spring; 556 a pull handle; 557 blocking means; 559 a latch; 560 pushing spring; 571 expanding part; 573 passive part; 575 a spring; 577 a connecting rod; 579 a bonding end; 591 end.

Detailed Description

The drawings are only for the purpose of illustrating the general teachings of the invention, and are not intended to suggest any limitation as to the number, placement, relationship or dimensions of the elements making up the preferred embodiment or embodiments disclosed herein, as will be appreciated and understood by those skilled in the art after the teachings herein are taught. In addition, the precise dimensions and dimensional proportions required to meet specific strength, weight, strength and the like are within the skill of the art after reading and learning at the instruction of the present invention.

The crane of the invention is a movable crane which can be directly arranged on a cross beam of a house for hanging and transporting heavy objects. Referring to fig. 1-6, the crane 11 of the present invention includes a clamp positioning device 20, a boom 44, a control tower 67, and a suspension device 310. The clamp positioning device 20 includes a base 22 and a first portion 24 and a second portion 26 coupled to the base 22 in a spaced apart relationship. A clamping space 28 is formed between the first portion 24 and the second portion 26. The first part 24 includes opposed fixed frames 30, each fixed frame 30 including a retainer 32 reciprocally displaceable in a direction toward the second part 26. Each positioning member 32 is provided with a clamping plate 34 towards one end of the second portion 26, each positioning member 32 is provided with a shifting lever 36 away from the other end of the second portion 26, and the second portion 26 of the holding and positioning device 20 comprises a fixing member 27. The base 22 includes a receiving space 38 extending along a transverse hollow direction. The holding space 28 is intended to receive a cross member 78 (shown in fig. 4) in the interior of a room. And the lever 36 of the retainer 32 is rotated to displace the retainer 32 toward the side of the beam 78 and the chuck 34 abuts the side of the beam 78, thereby retaining the base 22 in place on the beam 78 of the building.

The cantilever 44 includes a first end 45 and a second end 47 spaced apart. The cantilever 44 further includes a hollow passage 52 extending along the length thereof, the hollow passage 52 extending through the first end 45 and the second end 47. A through slot 54 extends through the lower surface of the cantilever 44, the through slot 54 communicates with the hollow passage 52, and two wings 56 are formed on both sides of the through slot 54 (as shown in fig. 2). The cantilever 44 is sleeved with the receiving space 38 of the base 22 of the clamping and positioning device 20, and the through slot 54 is exposed outside the receiving space 38. The first end 45 and the second end 47 of the cantilever 44 are located outside the base 22 (as shown in fig. 3 and 4), and the first end 45 of the cantilever 44 can extend outside the house.

The first end 45 and the second end 47 of the cantilever 44 are respectively provided with a first stop 46 and a second stop 48. A first hook 50A and a second hook 50B are respectively disposed on the upper edges of the first and

second baffles

46, 48. A hook plate 64 is pivotally mounted to the cantilever 44 proximate the first end 45. A hook 66 is formed at the second end 47 of the hook plate 64 facing the cantilever 44, and a first spring 65A is hung between the hook plate 64 and the cantilever 44. The hook plate 64 is pivotable relative to the cantilever 44 to a hooked position or an unhooked position, and the first spring 65A is used to bias the hook plate 64 in the hooked position.

The hook plate 64 is coupled to a link 577 at an end thereof adjacent to the hook portion 66, the link 577 includes a coupling end 579 coupled to the hook plate 64 and a distal end 591 adjacent to the coupling end 579, and pulling the link 577 moves the hook plate 64 to the hooking position or the unhooking position.

The crane 11 further includes two wire-tensioning devices 41 and a plurality of steel wires 43. Two ends of each thread stretching device 41 are respectively provided with a hook 42 capable of rotatably adjusting tension. The hooks 42 at two ends of one of the wire tensioners 41 are respectively connected with one steel wire 43, the tail end of one steel wire 43 is connected to the first hook 50A at the upper edge of the first baffle 46 of the cantilever 44, and the tail end of the other steel wire 43 is connected to the side of the cross beam 78. The hooks 42 at the two ends of the other wire device 41 are respectively connected with one steel wire 43, the end of one steel wire 43 is connected to the second hook 50B at the upper edge of the second baffle 48 of the cantilever 44, and the other steel wire 43 is connected to the fixing member 27 of the second portion 26 of the holding and positioning device 20, so that the cantilever 44 can be fixed and can not be displaced relative to the holding and positioning device 20.

The control tower 67 of the crane 11 includes a trolley 68, the trolley 68 including a base 72, the base 72 being pivotally mounted on a plurality of spaced apart wheels 74. The trolley 68 is movably mounted in the hollow channel 52 of the cantilever 44, the plurality of wheels 74 can slide on the two wings 56 of the cantilever 44 (as shown in fig. 5), the bottom 72 of the trolley 68 passes through the through slot 54 of the cantilever 44, and a stop bar 76 is disposed on the lower edge of the bottom 72.

The control tower 67 of the crane 11 further includes a support 511 combined with the trolley 68 to move together, the support 511 includes an upper end 513 and a lower end 515, the support 511 further includes a space 517 formed inside, the support 511 further includes an end cover 511A fixed on one side, a set of linkage rails 519 is symmetrically arranged in the space of the support 511, a control rail 511B is arranged on the surface of the end cover 511A and positioned in the space 517, the control rail 511B includes a closed bottom end 511C, substantially, the control rail 511B is substantially perpendicular to the linkage rails 519 and positioned at the end of the linkage rails 519 (as shown in fig. 6), the end cover 511A further includes a through hole 511D extending from the outer surface to the inner surface and communicating with the space 517, and a fixed combining part 516 is protrudingly arranged on the support 511 and positioned below the end cover 511A. The bracket 511 shown in the drawings is formed by combining two symmetrical L-shaped sheets, the space 517 is located between the two sheets, and the space 517 further comprises a lower opening 512 at the lower end 515. The upper end 513 of the bracket 511 is coupled to the bottom 72 of the trolley 68 and the bracket 511 is located outside of the cantilever 44. And a guide pulley 131 is pivoted in the space 517 at the upper end 513. The joint end 579 of the link 577 is sleeved with a positioning spring 69, and the elastic positioning of the positioning spring 69 keeps the end 591 of the link 577 close to the through hole 511D.

The control tower 67 in turn comprises a return member 531 and a release member 537 pivotally connected to the frame 511. The returning member 531 comprises a first extending portion 533 and a second extending portion 535, the second extending portion 535 is spaced apart from the first extending portion 533 around the circumference of the returning member 531, and the returning member 531 is pivotally disposed between the upper end 513 and the lower end 515 of the bracket 511. The release member 537 comprises a release paddle 539, a flange 551, and a lug 553, the flange 551 and the release paddle 539 being located in the space 517, the lug 553 being located outside the carrier 511, and the flange 551 being located between the lug 553 and the release paddle 539 in the axial direction of the release member 537. The release member 537 is pivotally mounted at the lower end 515 of the support 511 and near the lower opening 512.

The control tower 67 further includes a coupling block 451 movably coupled to the support 511 and an unhooking member 459 pivotally coupled to the coupling block 451 and moving together therewith. The interlocking slider 451 includes a notch 453 formed at the center of one side and a U-shaped pivoting portion 455 formed at the upper surface, and the interlocking slider 451 further includes a mounting portion 457 formed at the lower surface. The interlocking slide block 451 is movably coupled to the interlocking rail 519 and located in the space 517, and the interlocking slide block 451 is located between the release member 537 and the return member 531. The mounting portion 457 is coupled to a pull handle 556, the pull handle 556 is slidably coupled to the bracket 511, and a push spring 560 is disposed outside the pull handle 556 and between the mounting portion 457 and the bracket 511, the push spring 560 biasing the interlocking slide 451 toward the advanced position.

The unhooking member 459 includes a pivoting end 471 pivotally connected to the pivoting portion 455 and an outer end 473 extending toward the through hole 511D, the unhooking member 459 further includes a pressing plate 475 above the interlocking slide 451, and the pressing plate 475 includes an opening 477 aligned with the notch 453. A spring is provided between the unhooking member 459 and the interlocking slider 451 to bias the unhooking member 459 to a position tilted and tilted upward with respect to the interlocking slider 451 (as shown in fig. 5). The interlocking slider 451 carries the unhooking member 459 together along the interlocking rail 519 to displace to a forward position (as shown in fig. 7 and 8), a backward position (as shown in fig. 9) or a ready position (as shown in fig. 5).

The control tower 67 in turn includes a control slide 419 movably coupled with the control track 511B. The control slider 419 includes a pressing portion 431 protruding upward and two extension arms 435 extending from the end surface, the two extension arms 435 are substantially L-shaped and include a horizontal portion and a vertical portion, the two extension arms 435 are spaced apart in parallel to form a gap 437 therebetween, and the control slider 419 further includes an indicator 439 extending from one of the extension arms 435 and a movable coupling portion 433 formed in a ring shape at the other side surface.

The horizontal part of each extension arm 435 of the control slider 419 is positioned between the interlocking slider 451 and the homing member 531, the vertical part of each extension arm 435 is close to the interlocking slider 451, the end of the indicator 439 passes through the outer side of the bracket 511 (as shown in fig. 2) and the movable combining part 433 passes through the end cap 511A and is aligned with the fixed combining part 516. A first return spring 511E is disposed between the fixed coupling portion 516 and the movable coupling portion 433. The control slider 419 is displaceable along the control track 511B between the interlocking slider 451 and the return member 531 (as shown in fig. 9), and the first return spring 511E biases the control slider 419 to a position closer to the interlocking slider 451 and away from the return member 531 (as shown in fig. 5 and 6).

The control tower 67 includes a stopper 557 secured to the lower end 515 of the support frame 511. The stopping device 557 comprises a housing fixed to the bracket 511 and a pin 559 (shown in fig. 6) movable relative to the housing, wherein one end of the pin 559 protrudes outside the housing, the pin 559 comprises an enlarged portion 571 located in the housing and a passive portion 573 protruding outside the housing and being planar, the enlarged portion 571 is located between the end of the pin 559 and the passive portion 573, a spring 575 is provided between the housing and the enlarged portion 571, and the spring 575 biases the pin 559 to a position in which the end is outside the housing. The stopping device 557 is fixed under the interlocking slide block 451 and the plug 559 extends out of the end of the housing near the interlocking slide block 451. In addition, a second return spring 555 is disposed between ledge 553 of release member 537 and frame 511. Second return spring 555 biases release member 537 to a position where flange 551 allows latch 559 to be in the extended position (as shown in FIG. 9)

The suspension device 310 of the crane 11 of the present invention comprises a steel cable 311, a hook 313 disposed at one end of the steel cable 311, and a catch block 315 fixedly connected to the steel cable 311 above the hook 313. The other end of the steel cable 311 is inserted into the control tower 67 from bottom to top through the lower opening 512 of the bracket 511, and is connected to a winding mechanism (not shown) having an electric motor after being wound around the guide pulley 131 through a gap 437 between two extension arms 435 and passing through another roller disposed at the second end 47 of the suspension arm 44, and it should be noted that the notch 453 and the opening 477 are also used to accommodate the steel cable 311. Controlling the electric motor to wind or release the steel cable 311 controls the displacement of the latch block 315 and the hook 313 up or down, and the latch block 315 may be displaced to a lifting position (as shown in fig. 5), a releasing position (as shown in fig. 7), a pressing position (as shown in fig. 8), or a returning position (as shown in fig. 9) as the steel cable 311 is wound or released.

For convenience of description it will be assumed that the crane 11 of the present invention has been mounted on a beam 78 in any floor of a building (as shown in figure 4) and that the first end 45 of the jib 44 has been extended outside the opening in that floor. And, the control tower 67 is located at the first end 45 of the cantilever 44, and the catch 76 is hooked by the hook portion 66 of the hook plate 64, in which state the control tower 67 is positioned at the first end 45 of the cantilever 44 and cannot move along the cantilever 44. Further assuming that the latch block 315 is located at the lifting position outside the bracket 511 (as shown in fig. 5 and 6), the interlocking slide block 451 is blocked by the vertical sections of the two extension arms 435 and is kept at the ready position (as shown in fig. 5). In this state, since the control tower 67 cannot move and the latch block 315 is located at the lifting position, the steel cable 311 is retracted to raise the height of the latch block 315 and the hook 313, and the steel cable 311 is released to lower the height of the latch block 315 and the hook 313, so that the steel cable can be used for lifting or lowering a weight hanger, and can be used for hanging a weight or unloading a hung weight.

Assuming that the hook 313 correctly hangs the weight at the lower displacement position, the control steel cable 311 is wound up, so that the latch block 315, the hook 313 and the hung weight are lifted up together, as shown in fig. 5 and 7, when the latch block 315 is displaced from the lifting position outside the bracket 511 into the space 517 of the bracket 511 from the lower opening 512, and the latch block 315 is displaced toward the releasing position with continued winding up of the steel cable 311, the latch block 315 is pressed against the control slider 419 to be displaced together. Referring to fig. 7, when the latch block 315 is located at the releasing position, the control slider 419 is displaced to separate the vertical sections of the two extension arms 435 from the linking slider 451, so that the linking slider 451 is pushed by the pushing spring 560 to be displaced from the ready position to the forward position (as shown in fig. 7), when the linking slider 451 is located at the forward position, the lower opening 512 is closed by the linking slider 451 and the pressing plate 475 is displaced below the latch block 315, that is, the pressing plate 475 is located between the linking slider 451 and the latch block 315 (as shown in fig. 7), and the outer end 473 of the unhooking member 459 passes through the through hole 511D of the end cap 511A and is combined with the end 591 of the connecting rod 577.

It should be noted that the continuous retraction of the steel cable 311 is stopped after the interlocking slider 451 is located at the advanced position, and the interlocking slider 451 is displaced to the advanced position, which can be determined from the height of the indicator 439 of the control slider 419 and whether the unhooking member 459 is engaged with the distal end 591 of the link 577. For example, the surface of the bracket 511 may be provided with a distinct score corresponding to the indication rod 439, and the position of the detent block 315 may be determined by matching the score with the height position of the indication rod 439.

Referring to fig. 8, after the linkage slider 451 is located at the forward position, if the control tower 67 is to be displaced along the suspension arm 44, the steel cable 311 needs to be released, so that the latch block 315 is displaced from the release position to the pressing position, the latch block 315 presses the pressing plate 475 to pivot the unhooking member 459, and further, the outer end 473 of the unhooking member 459 presses the tail end 591 of the link 577 to pull the hook plate 64 to pivot, so that the hook 66 is separated from the blocking lever 76. When the steel cable 311 is reeled in the state that the blocking rod 76 is separated from the hook 66, the whole control tower 67 will displace along the cantilever 44 towards the direction close to the second end 47, and the heights of the detent block 315, the hook 313 and the suspended weight will not change when the steel cable 311 is reeled in, the detent block 315 is kept at the pressing position, and the detent block 315 can not displace towards the lifting position because the lower opening 512 is closed by the interlocking slide block 451.

Referring to fig. 9 and 10, when the control tower 67 is displaced to the second end 47 of the suspension arm 44 (for example, when a heavy object is moved to the indoor space), the control tower 67 can be manually abutted against the control tower 67, so that the control tower 67 can not be displaced along the suspension arm 44 to retract the steel cable 311, so that the latch block 315 pushes the control slider 419 to be displaced (raised) from the abutting position to the reciprocating return position, when the latch block 315 is displaced to the return position, the abutting portion 431 of the control slider 419 abuts against the first extending portion 533 to pivot the return member 531, the second extending portion 535 of the return member 531 abuts against the interlocking slider 451 to be displaced from the forward position (shown in fig. 8) to the backward position (shown in fig. 9), and when the interlocking slider 451 is displaced to the backward position, the release member 537 is biased by the second return spring, so that the latch 559 of the blocking device 557 can protrude to the protruding position to block the interlocking slider 451, so that the interlocking slider 451 is temporarily kept at the backward position.

When the interlocking slider 451 is located at the backward position, the lower opening 512 is opened, so that the steel cable 311 is released by operation, the locking block 315 is displaced from the return position to the lifting position, the heights of the locking block 315, the hook 313 and the weight can be lowered, and the control slider 419 is moved to the bottom end 511C of the control rail 511B by the action of the first return spring 511E. Referring to fig. 11, in the process of moving the latch block 315 from the return position to the lifting position, the latch block 315 presses the release paddle 539 to pivot the release member 537, the flange 551 of the release member 537 presses the passive portion 573 of the blocking device 557 to move the latch 559 from the extended position to the retracted position below the link slider 451, so that the link slider 451 is biased by the pushing spring 560 to move from the retracted position to the ready position and abuts against the vertical sections of the two extension arms 435 of the control slider 419 (as shown in fig. 5), and since the lower opening 512 is not closed when the link slider 451 is in the ready position, the latch block 315 can move to the lifting position, and further the suspended heavy object can be unloaded to the ground.

Thus, the operation of hanging the heavy object from the outside to the inside at one time is smoothly completed. When the heavy object is to be hung again, the control tower 67 needs to be pushed to a position (the first end 45 of the cantilever 44) where the stopper 76 is engaged with the hook plate 64 again.

The control tower 67 of the crane 11 can release the suspension operation that cannot be displaced relative to the suspension arm 44 but the weight height can be changed into the moving operation that the weight height cannot be changed but can be displaced relative to the suspension arm 44 by retracting or releasing the steel cable 311 through the arrangement of the interlocking slide block 451, the unhooking member 459 and the connecting rod 577, and has better convenience in use.

Through the technical characteristics that the lower opening 512 is closed when the linkage slide block 451 is moved to the forward position, and the locking block 315 is located above the linkage slide block 451, the suspended heavy object is ensured not to fall off due to the loosening of the steel cable 311 when the crane 11 is moved, and the use has better safety.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations, or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An automatically unhooking crane, comprising:

a cantilever;

a hook plate pivoted to the cantilever arm, the hook plate being pivotable to a hooking position or an unhooking position;

the control tower comprises a stop lever and a guide pulley, the stop lever can be combined with the hook plate, the guide pulley can be combined with the hook plate, the control tower further comprises a linkage sliding block which can be moved to a retreating position, a forward position or a preparation position, the control tower further comprises an unhooking component which is pivoted with the linkage sliding block, when the hook plate is positioned at the hooking position and combined with the stop lever, the control tower cannot move along the cantilever, and when the hook plate is positioned at the unhooking position or separated from the stop lever, the control tower can move along the cantilever;

a link including a coupling end coupled with the hook plate and a distal end;

a steel cable passing through the control tower and abutting against the guide pulley;

a hook coupled to an end of the steel cable;

the linkage sliding block is arranged at the lifting position, the linkage sliding block is arranged at the preparation position, the unhooking component is separated from the tail end of the connecting rod, the hook plate is arranged at the hooking position and is combined with the stop rod, the control tower can move along the cantilever, when the clamping block is arranged at the resetting position, the linkage sliding block is arranged at the retreating position, the unhooking component is separated from the tail end of the connecting rod, when the clamping block is arranged at the resisting position, the hook plate is arranged at the unhooking position and is separated from the stop rod, when the clamping block is arranged at the hooking position, the control tower can move along the cantilever, when the clamping block is arranged at the resetting position, the linkage sliding block is arranged at the preparation position, the unhooking component is separated from the tail end of the connecting rod, the hook plate is arranged at one of the hooking position and the stop rod, and the linkage sliding block is arranged at the resetting position, and the linkage sliding block is displaced from the lifting position to the linkage position.

2. The automatically unhooking crane according to claim 1, wherein said control tower further comprises:

3. The automatically unhooked crane according to claim 2, wherein said control tower further comprises:

the bolt further comprises a passive part which is combined with the flange in a linkage mode, when the clamping block moves from the resetting position to the lifting position, the clamping block presses the releasing shifting piece to enable the releasing piece to pivot, the flange presses the passive part to move, and the bolt moves from the extending position to the inward-retracting position.

4. The automatically unhooked crane according to claim 1 or 2, wherein said control tower further comprises:

the control slide block comprises a pressing part, and the clamping block moves to a release position, a pressing position or a resetting position and is linked with the control slide block to move together;

when the clamping block moves to the resetting position, the pressing part of the control slide block presses the first extending part of the resetting piece to enable the resetting piece to pivot, and the second extending part pushes the linkage slide block located at the advancing position back to the retreating position.

5. The crane capable of automatically unhooking according to claim 4, wherein the control slider further comprises an extension arm, the engaging block presses against the extension arm to push the control slider to move, and the linkage slider abuts against the extension arm when in the ready position.

6. The crane capable of automatically unhooking according to claim 5, wherein the extension arm comprises a horizontal portion and a vertical portion connected to the end of the horizontal portion, the latch block pushes the control slider to move against the horizontal portion of the extension arm, and the linking slider abuts against the vertical portion of the extension arm when in the ready position.

7. The crane capable of automatically unhooking as claimed in claim 1, wherein the unhooking member further comprises a pressing plate pivoted together, the pressing plate comprises an opening corresponding to the notch, when the interlocking slider is located at the backward position or the preparatory position, the pressing plate is located outside a moving path of the locking block, when the interlocking slider is located at the forward position, the pressing plate is located on the moving path of the locking block, and when the locking block is located at the pressing position, the locking block presses the pressing plate to pivot the unhooking member.

8. The automatically unhooking crane according to claim 1, wherein the control tower comprises:

the linkage slide block is combined with the linkage track in a sliding mode and also comprises an installation part;

a pull handle slidably coupled to the holder, a distal end of the pull handle being coupled to the mounting portion of the interlocking slider;

and the pushing spring is sleeved on the outer side of the pull handle and is positioned between the mounting part and the bracket, and the pushing spring biases the linkage sliding block towards the advancing position.

9. The crane capable of automatically unhooking as claimed in claim 8, wherein the control tower comprises a lower opening through which the catch block is displaceable between a lifting position and a releasing position, and when the interlocking slider is in the forward position, the catch block is located above the interlocking slider and the lower opening is closed by the interlocking slider, and the catch block cannot be displaced to the lifting position.