Crane with automatic decoupling

Abstract

The present invention provides a crane capable of automatically decoupling, which includes a clamping and positioning device for fixing on the cross beam of a house and a cantilever combined with the clamping and positioning device. The crane further includes a control tower movably combined with the cantilever. The control tower can be restricted and positioned by a hook plate pivotally arranged on the cantilever and cannot displace along the cantilever. When the control tower cannot displace along the cantilever, retracting or releasing a steel cable can control the height of the suspended object, and by retracting or releasing the steel cable, it is allowed to control the hook plate to automatically decouple the control tower so that it can displace along the cantilever. In the state where the control tower can displace along the cantilever, retracting the steel cable drives the control tower to displace, and retracting or releasing the steel cable will not change the height of the suspended object.

Description

Technical Field

[0001] The present invention relates to a crane, especially a lifting and moving machine that can lift heavy objects on the ground to any floor height and move the lifted heavy objects into the room by a moving trolley. Background Art

[0002] Known high-rise building hanging scaffolds and crane structures use various forms of clamping components to clamp and position the cantilever on the parapet wall of the top floor, so that the cantilever protrudes outside the parapet wall. A cable that can be lifted and slid is provided at the front end of the cantilever. One end of the cable is provided with a hook, and the other end is connected to a lifting and rotating power device on the ground. In this way, heavy objects on the ground can be hung on the hook of the cable, and then the lifting and rotating power device on the ground is started to pull the cable, so as to lift the heavy object to the top floor position, and then the cantilever is rotated to the top floor surface, so that the heavy object is lifted off the ground and placed on the top floor surface for unloading. However, when performing decoration operations on each floor other than the top floor, it may not be possible to use it because there may be no low wall available for clamping and erection due to the on-site conditions. Or because there are walls on both sides of the windows on each floor other than the top floor, even if the above-mentioned high-rise building hanging scaffolds and cranes can be erected on the low walls of the windows, the existing exterior wall will still block the rotation of the cantilever, and it is impossible to rotate the cantilever with the lifted heavy object into the floor of this floor. Therefore, the common high-rise building hanging scaffolds and crane structures at present are only suitable for lifting heavy objects on the ground to the top floor surface of the building, and cannot lift and move heavy objects on the ground into each floor indoor of the house, resulting in great inconvenience in taking materials for construction on floors other than the top floor. Summary of the Invention

[0003] To solve the above problems, the present invention provides a crane capable of automatic decoupling, comprising: a cantilever; a hook plate pivotally mounted on the cantilever, the hook plate being pivotable to a coupling position or a decoupling position; a control tower movably coupled to the cantilever, the control tower including a stop bar and a guide pulley that can be coupled to the hook plate, the control tower further including a linkage slider that can be displaced to a retracted position, a forward position or a standby position, the control tower further including a decoupling member pivotally connected to the linkage slider; when the hook plate is in the coupling position and coupled to the stop bar, the control tower cannot move along the cantilever, when the hook plate is in the decoupling position or separated from the stop bar, the control tower can move along the cantilever; a connecting rod including a coupling end and a terminal end coupled to the hook plate; a steel cable passing through the control tower and abutting against the guide pulley; a hook coupled to one end of the steel cable; a latch block coupled to the steel cable and adjacent to the hook, the winding or releasing of the steel cable drives the displacement of the latch block, the latch block can be displaced to a lifting position, a pressing position, a releasing position or a reset position; when the latch block is in the lifting position, the linkage slider is in the standby position, the decoupling member is separated from the terminal end of the connecting rod, and the hook plate is in the coupling position and coupled to the stop bar; when the latch block is in the releasing position, the linkage slider is displaced to the forward position, the decoupling member is coupled to the terminal end of the connecting rod, and the hook plate is in the coupling position and coupled to the stop bar; when the latch block is in the pressing position, the hook plate is in the decoupling position and separated from the stop bar, and the control tower can move along the cantilever; when the latch block is in the reset position, the linkage slider is in the retracted position, the decoupling member is separated from the terminal end of the connecting rod, and the hook plate is either in the coupling position and coupled to the stop bar or separated from the stop bar; when the latch block is displaced from the reset position to the lifting position, the linkage slider is displaced to the standby position.

[0004] Through the arrangement of the linkage slider, the decoupling member and the connecting rod in the control tower of the crane, the control tower can be released by winding or releasing the steel cable, so that the suspension operation in which the control tower cannot move relative to the cantilever but the height of the heavy object can be changed is changed to a moving operation in which the height of the heavy object cannot be changed but the control tower can move relative to the cantilever, which has better convenience in use.

[0005] The crane capable of automatic decoupling, wherein the control tower further includes:

[0006] A blocking device including a bolt that moves to an extended position or a retracted position; when the linkage slider is in the retracted position, the bolt is in the extended position to position the linkage slider in the retracted position, when the linkage slider is in the forward position or the standby position, the bolt is in the retracted position to allow the linkage slider to move.

[0007] The automatically detachable crane, wherein the control tower further comprises:

[0008] A rotatable release member, including a release lever and a flange, the latch further includes a passive portion integrally coupled with the flange. When the latch block displaces from the return position to the lifting position, the latch block presses against the release lever to pivot the release member, the flange presses against the passive portion to displace it, and the latch displaces from the extended position to the retracted position.

[0009] The automatically detachable crane, the control tower further comprises: A movable control slider, the control slider includes a pressing portion, the displacement of the latch block to the release position, the pressing position or the return position drives the control slider to displace together. A rotatable return member, the return member includes a first extension portion and a second extension portion. When the latch block displaces to the return position, the pressing portion of the control slider presses against the first extension portion of the return member to pivot the return member, and the second extension portion pushes the linkage slider located at the forward position back to the backward position.

[0010] The automatically detachable crane, the control slider further includes an extension arm, the latch block presses against the extension arm to push the control slider to displace, and the linkage slider abuts against the extension arm when located at the standby position.

[0011] The automatically detachable crane, the extension arm includes a horizontal portion and a vertical portion connected to the end of the horizontal portion, the latch block presses against the horizontal portion of the extension arm to push the control slider to displace, and the linkage slider abuts against the vertical portion of the extension arm when located at the standby position.

[0012] The automatically detachable crane, wherein the detaching member further includes a pressing plate that pivots together. The pressing plate includes an opening corresponding to the notch. When the linkage slider is located at the backward position or the standby position, the pressing plate is located outside the moving path of the latch block. When the linkage slider is located at the forward position, the pressing plate is located on the moving path of the latch block. When the latch block is located at the pressing position, the latch block presses against the pressing plate to pivot the detaching member.

[0013] The automatically detachable crane, the control tower includes: A bracket, the bracket includes a linkage track, the linkage slider is slidably coupled with the linkage track, the linkage slider further includes a mounting portion, A pull handle, slidably coupled with the bracket, the end of the pull handle is coupled with the mounting portion of the linkage slider, A pushing spring, sleeved outside the pull handle and located between the mounting portion and the bracket, the pushing spring biases the linkage slider towards the forward position.

[0014] Regarding the crane that can be automatically decoupled, the control tower includes a lower opening. The locking block can be displaced between a lifting position and a release position through the lower opening. When the linkage slider is in the forward position, the locking block is located above the linkage slider and the lower opening is closed by the linkage slider, and the locking block cannot be displaced to the lifting position.

[0015] With the technical feature that the lower opening is closed when the linkage slider is displaced to the forward position and the locking block is located above the linkage slider, it is ensured that the suspended heavy object will not fall due to the loosening of the steel cable when the crane performs a moving operation, and it has better safety in use.

[0016] The present invention can be more clearly understood under the detailed description of the illustrative embodiments of the present invention in conjunction with the drawings. Brief Description of the Drawings

[0017] Figure 1 is an exploded perspective view of the control tower.

[0018] Figure 2 is a perspective combined view of the control tower installed in the cantilever.

[0019] Figure 3 is a perspective combined view of the crane.

[0020] Figure 4 is a side view of the crane.

[0021] Figure 5 is an enlarged view of the control tower.

[0022] Figure 6 is along Figure 3 a cross-sectional view taken along line 6-6.

[0023] Figure 7 is a state diagram when the locking block of the control tower is in the release position.

[0024] Figure 8 is a state diagram when the locking block of the control tower is in the pressing position.

[0025] Figure 9 is a state diagram when the locking block of the control tower is in the return position.

[0026] Figure 10 A state diagram of the control tower displaced to the second end of the cantilever.

[0027] Figure 11 is a state diagram of the locking block of the control tower displacing the linkage release member from the return position to the lifting position.

[0028] Description of reference numerals: 11 crane; 20 clamping and positioning device; 22 base; 24 first part; 26 second part; 27 fixing member; 28 clamping space; 30 fixing frame; 32 positioning member; 34 chuck; 36 lever; 41 wire winder; 42 hook; 43 steel wire; 44 cantilever; 45 first end; 46 first baffle; 47 second end; 48 second baffle; 50A first hook; 50B second hook; 52 hollow channel; 54 through slot; 56 wing plate; 64 hook plate; 65A first spring; 66 hook portion; 67 control tower; 68 pulley; 69 positioning spring; 72 bottom; 74 wheel; 76 stop bar; 78 cross beam; 131 guiding pulley; 310 suspension device; 311 cable; 313 hook; 315 locking block; 419 control slider; 431 pressing portion; 433 movable joint portion; 435 extension arm; 437 gap; 439 indicating member; 451 linkage slider; 453 notch; 455 pivot portion; 457 mounting portion; 459 unhooking member; 471 pivot end; 473 outer end; 475 pressing plate; 477 opening; 511 bracket; 511A end cap; 511B control track; 511C bottom end; 511D through hole; 511E first return spring; 512 lower opening; 513 upper end; 515 lower end; 516 fixed joint portion; 517 space; 519 linkage track; 531 return member; 533 first extension portion; 535 second extension portion; 537 release member; 539 release lever; 551 flange; 553 lug; 555 second return spring; 556 pull handle; 557 blocking device; 559 bolt; 560 pushing spring; 571 enlarged portion; 573 passive portion; 575 spring; 577 connecting rod; 579 joint end; 591 end. Detailed implementation

[0029] All the drawings are only for facilitating the explanation of the basic teachings of the present invention. The number, position, relationship, and dimension extension of the elements constituting the preferred embodiment will be described in the drawings. After reading and understanding the teachings of the present invention, the relevant variant implementations belong to the skills in the industry. In addition, after reading and understanding the teachings of the present invention, the change of the precise dimensions and dimensional ratios in cooperation with specific forces, weights, strengths, and similar requirements also belongs to the skills in the industry.

[0030] The crane of the present invention is a movable crane that can be directly installed on the crossbeam of a house to hang and transport heavy objects. With reference to FIGS. 1 to 6, the crane 11 of the present invention includes a clamping and positioning device 20, a cantilever 44, a control tower 67, and a suspension device 310. The clamping and positioning device 20 includes a base 22 and a first part 24 and a second part 26 that are relatively spaced apart and combined on the base 22. A clamping space 28 is formed between the first part 24 and the second part 26. The first part 24 includes two opposite fixed frames 30, and each fixed frame 30 includes a positioning member 32 that can move back and forth in the direction towards the second part 26. A chuck 34 is provided at one end of each positioning member 32 facing the second part 26, and a lever 36 is provided at the other end of each positioning member 32 away from the second part 26. The second part 26 of the clamping and positioning device 20 includes a fixing member 27. The base 22 includes an accommodating space 38 that extends hollowly along a transverse direction. The clamping space 28 is used to accommodate a crossbeam 78 (as shown in Figure 4 ). And when the lever 36 of the positioning member 32 rotates, the positioning member 32 can be displaced towards the side of the crossbeam 78, and the chuck 34 abuts against the side of the crossbeam 78, so that the base 22 can be clamped and positioned on the crossbeam 78 of the house.

[0031] The cantilever 44 includes a first end 45 and a second end 47 that are spaced apart. The cantilever 44 further includes a hollow channel 52 that extends along its length direction, and the hollow channel 52 penetrates through the first end 45 and the second end 47. A through groove 54 extends on the lower surface of the cantilever 44, and the through groove 54 communicates with the hollow channel 52. Two wing plates 56 are formed on both sides of the through groove 54 (as shown in Figure 2 ). The cantilever 44 is sleeved with the accommodating space 38 of the base 22 of the clamping and positioning device 20, and the through groove 54 is exposed outside the accommodating space 38. The first end 45 and the second end 47 of the cantilever 44 are located outside the base 22 (as shown in Figure 3 and Figure 4 ), and the first end 45 of the cantilever 44 can extend out of the outside of the house.

[0032] First baffles 46 and a second baffle 48 are respectively provided at the edges of the first end 45 and the second end 47 of the cantilever 44. First hooks 50A and a second hook 50B are respectively provided at the upper edges of the first and second baffles 46, 48. A hook plate 64 is pivotally provided near the first end 45 of the cantilever 44. A hook portion 66 is formed on the hook plate 64 facing the second end 47 of the cantilever 44, and a first spring 65A is hung between the hook plate 64 and the cantilever 44. The hook plate 64 can be pivoted relative to the cantilever 44 to a hooked position or a unhooked position, and the first spring 65A is used to bias the hook plate 64 to the hooked position.

[0033] One end of the hook plate 64 near the hook portion 66 is combined with a connecting rod 577. The connecting rod 577 includes a combined end 579 combined with the hook plate 64 and an end 591 near the end away from the combined end 579. Pulling the connecting rod 577 drives the hook plate 64 to displace to the hooked position or the unhooked position.

[0034] The crane 11 further includes two wire tensioners 41 and a plurality of steel wires 43. A hook 42 for rotatably adjusting the tension is provided at each end of each wire tensioner 41. Hooks 42 at both ends of one of the wire tensioners 41 are respectively connected to a steel wire 43. One end of one of the steel wires 43 is connected to the first hook 50A on the upper edge of the first baffle 46 of the cantilever 44, and the other end of the steel wire 43 is connected to the side of the cross beam 78. Hooks 42 at both ends of the other wire tensioner 41 are respectively connected to a steel wire 43. One end of one of the steel wires 43 is connected to the second hook 50B on the upper edge of the second baffle 48 of the cantilever 44, and the other end of the steel wire 43 is connected to the fixing member 27 of the second part 26 of the clamping and positioning device 20, so that the cantilever 44 can be fixed and will not displace relative to the clamping and positioning device 20.

[0035] The control tower 67 of the crane 11 includes a pulley 68. The pulley 68 includes a bottom 72, and a plurality of wheels 74 pivotally provided at intervals are provided on the bottom 72. The pulley 68 is movably installed in the hollow channel 52 of the cantilever 44, and the plurality of wheels 74 can slide on the two wing plates 56 of the cantilever 44 (as Figure 5 shown). The bottom 72 of the pulley 68 passes through the through slot 54 of the cantilever 44, and a stop rod 76 is provided at the lower edge of the bottom 72.

[0036] The control tower 67 of the crane 11 further includes a bracket 511 combined with the pulley 68 and moving together. The bracket 511 includes an upper end 513 and a lower end 515. The bracket 511 further includes a space 517 formed inside. The bracket 511 further includes an end cover 511A fixed on one side. A set of interlocking tracks 519 are symmetrically arranged in the space of the bracket 511. A control track 511B is provided on the surface of the end cover 511A and located in the space 517. The control track 511B includes a closed bottom end 511C. Substantially, the control track 511B is substantially perpendicular to the interlocking tracks 519 and is located at the end of the interlocking tracks 519 (as Figure 6As shown, in addition, the end cap 511A further includes a perforation 511D extending from the outer surface to the inner surface and communicating with the space 517. Moreover, a fixed coupling portion 516 is prominently provided on the bracket 511 and below the end cap 511A. The bracket 511 shown in the drawings of the present invention is formed by combining two symmetrical L-shaped sheets. The space 517 is located between the two sheets. In addition, the space 517 further includes 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 pulley 68, and the bracket 511 is located outside the cantilever 44. And a guide pulley 131 is pivotally provided in the space 517 and at the upper end 513. A positioning spring 69 is sleeved on the coupling end 579 of the link 577, and the elastic positioning of the positioning spring 69 keeps the end 591 of the link 577 close to the perforation 511D.

[0037] The control tower 67 further includes a return member 531 pivotally connected to the bracket 511 and a release member 537. The return member 531 includes a first extension portion 533 and a second extension portion 535. The second extension portion 535 is spaced from the first extension portion 533 in the circumferential direction of the return member 531. The return member 531 is pivotally provided between the upper end 513 and the lower end 515 of the bracket 511. The release member 537 includes a release lever 539, a flange 551, and a lug 553. The flange 551 and the release lever 539 are located in the space 517, and the lug 553 is located outside the bracket 511. And the flange 551 is located between the lug 553 and the release lever 539 along the axial direction of the release member 537. The release member 537 is pivotally provided at the lower end 515 of the bracket 511 and near the lower opening 512.

[0038] The control tower 67 further includes a linkage slider 451 movably coupled to the bracket 511 and a decoupling member 459 pivotally connected to the linkage slider 451 and moving together with it. The linkage slider 451 includes a notch 453 formed in the center of one side and a U-shaped pivot portion 455 formed on the upper surface. The linkage slider 451 further includes a mounting portion 457 formed on the lower surface. The linkage slider 451 is movably coupled to the linkage track 519 and is located in the space 517. The linkage slider 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. A push spring 560 is provided outside the pull handle 556 and between the mounting portion 457 and the bracket 511. The push spring 560 biases the linkage slider 451 toward the forward position.

[0039] The decoupling member 459 includes a pivoting end 471 pivotally connected to the pivoting portion 455 and an outer end 473 extending toward the perforation 511D. The decoupling member 459 further includes a pressing plate 475 located above the interlocking slider 451. The pressing plate 475 includes an opening 477 aligned with the notch 453. A spring is provided between the decoupling member 459 and the interlocking slider 451 to bias the decoupling member 459 to a position inclined and tilted upward relative to the interlocking slider 451 (as shown in Figure 5 ). The interlocking slider 451 drives the decoupling member 459 to move along the interlocking track 519 to a forward position (as shown in FIGS. 7 and 8), a backward position (as shown in Figure 9 ), or a standby position (as shown in Figure 5 ).

[0040] The control tower 67 further includes a control slider 419 movably coupled to the control track 511B. The control slider 419 includes a pressing portion 431 protruding upward and two extending arms 435 extending from the end face. The two extending arms 435 are generally L-shaped and include a horizontal portion and a vertical portion. The two extending arms 435 are spaced apart in parallel to form a gap 437 therebetween. The control slider 419 further includes an indicating member 439 extending from one of the extending arms 435 and a movable coupling portion 433 formed as a ring on the other side.

[0041] The horizontal portions of the respective extending arms 435 of the control slider 419 are located between the interlocking slider 451 and the return member 531, and the vertical portions of the extending arms 435 are close to the interlocking slider 451. The end of the indicating member 439 passes through the outside of the bracket 511 (as shown in Figure 2 ), and the movable coupling portion 433 passes through the end cap 511A and is aligned with the fixed coupling portion 516. A first return spring 511E is provided between the fixed coupling portion 516 and the movable coupling portion 433. The control slider 419 can move along the control track 511B between the interlocking slider 451 and the return member 531 (as shown in Figure 9 ), and the first return spring 511E biases the control slider 419 to a position closer to the interlocking slider 451 and farther from the return member 531 (as shown in FIGS. 5 and 6).

[0042] The control tower 67 includes a blocking device 557 fixed to the lower end 515 of the bracket 511. The blocking device 557 includes a housing fixed to the bracket 511 and a plug 559 movable relative to the housing (as shown in Figure 6As shown in the figure), one end of the latch 559 passes through the outside of the shell, and the latch 559 includes an enlarged portion 571 located inside the shell and a passive portion 573 extending out of the shell and being planar, the enlarged portion 571 is located between the end of the latch 559 and the passive portion 573, and a spring 575 is provided between the shell and the enlarged portion 571, and the spring 575 biases the latch 559 to a position where the end is located outside the shell. The blocking device 557 is fixedly provided below the linkage slider 451, and the latch 559 extends out of the end of the shell close to the linkage slider 451. In addition, a second return spring 555 is provided between the lug 553 of the release member 537 and the bracket 511, and the second return spring 555 biases the release member 537 to a position where the flange 551 allows the latch 559 to be in the extended position (as shown in the figure). Figure 9 (shown)

[0043] The suspension device 310 of the crane 11 of the present invention includes a steel cable 311 and a hook 313 disposed at one end of the steel cable 311, and a latch block 315 is fixed on the steel cable 311 above the hook 313. The other end of the steel cable 311 passes through the lower opening 512 of the bracket 511 from bottom to top and enters the control tower 67, passes through the gap 437 between the two extension arms 435, is wound around the guide pulley 131, and passes through another roller disposed at the second end 47 of the cantilever 44, and is connected to a winding mechanism equipped with an electric motor (not shown in the figure). It is worth mentioning 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 can control the displacement of the latch block 315 to rise or fall together with the hook 313, and the latch block 315 can be displaced to a lifting position (such as 1 / 2" or 2 / 3") as the steel cable 311 is wound or released. Figure 5 ), a release position (as shown), Figure 7 as shown), a pressing position (as shown Figure 8 ) or a reset position (as shown Figure 9 shown).

[0044] For the convenience of explanation, it is assumed that the crane 11 of the present invention has been installed on a beam 78 in any floor of a building (such as Figure 4 ), and the first end 45 of the cantilever 44 has extended out of the opening of the floor. Also, the control tower 67 is located at the first end 45 of the cantilever 44, and the blocking rod 76 is hooked by the hook portion 66 of the hook plate 64. In this state, the control tower 67 is positioned at the first end 45 of the cantilever 44 and cannot move along the cantilever 44. Further, it is assumed that the latch block 315 is located at the lifting position outside the bracket 511 (as shown in Figures 5 and 6), and the linkage slider 451 is blocked by the vertical sections of the two extension arms 435 and remains in the preparatory position (as shown in Figures 5 and 6). Figure 5As shown. In this state, since the control tower 67 cannot move and the latch block 315 is in the lifting position, winding the cable 311 will cause the latch block 315 and the hook 313 to lift in height, and releasing the cable 311 will cause the latch block 315 and the hook 313 to lower in height. Thus, it can be used to lift or lower a heavy object, or to hang or unload a hanging heavy object.

[0045] Assume that after the hook 313 correctly hangs a heavy object at a lower displacement position, next, it is shown that the control cable 311 is wound, so that the latch block 315, the hook 313, and the hanging heavy object are lifted together in height. As shown in FIGS. 5 and 7, when the latch block 315 displaces from the lifting position outside the bracket 511 through the lower opening 512 into the space 517 of the bracket 511, and the latch block 315 displaces towards the release position as the cable 311 continues to be wound, the latch block 315 presses the control slider 419 to displace together. Refer to Figure 7 As shown, when the latch block 315 is in the release position, the control slider 419 displaces until the vertical sections of the two extension arms 435 are disengaged from the linkage slider 451, so that the linkage slider 451 is pushed by the pushing spring 560 and displaces from the preparatory position to the forward position (as Figure 7 shown). When the linkage slider 451 is in the forward position, the lower opening 512 is closed by the linkage slider 451 and the pressing plate 475 displaces below the latch block 315, that is, at this time, the pressing plate 475 is located between the linkage slider 451 and the latch block 315 (as Figure 7 shown). In addition, the outer end 473 of the hook release member 459 passes through the perforation 511D of the end cover 511A and is combined with the end 591 of the connecting rod 577.

[0046] It should be noted that after the linkage slider 451 is in the forward position, the winding of the cable 311 should be stopped. The displacement of the linkage slider 451 to the forward position can be judged from the height of the indicating member 439 of the control slider 419 and whether the hook release member 459 is combined with the end 591 of the connecting rod 577. For example, obvious markings can be provided on the surface of the bracket 511 corresponding to the indicating rod 439, and the position of the latch block 315 can be judged by the markings in cooperation with the height position of the indicating rod 439.

[0047] Refer to and Figure 8As shown, after the linkage slider 451 is in the forward position, if it is desired to displace the control tower 67 along the cantilever 44, the steel cable 311 needs to be released. In this way, the locking block 315 is displaced from the release position to the pressing position, and the locking block 315 presses the pressure plate 475 so that the hook release member 459 pivots. Further, the outer end 473 of the hook release member 459 presses the end 591 of the link 577 to pull the link 577 to pivot the hook plate 64. In this way, the hook portion 66 will be separated from the stop lever 76. When the stop lever 76 is separated from the hook portion 66, the steel cable 311 is wound up. The entire control tower 67 will be displaced along the cantilever 44 toward the direction close to the second end 47, and when the steel cable 311 is wound up, the heights of the locking block 315, the lifting hook 313, and the suspended heavy object will not change. The locking block 315 remains in the pressing position, and since the lower opening 512 is closed by the linkage slider 451, the locking block 315 cannot be displaced toward the lifting position either.

[0048] Referring to FIGS. 9 and 10, when the control tower 67 is displaced to the second end 47 of the cantilever 44 (for example, when the heavy object is moved to the indoor space), the control tower 67 can be manually held to prevent it from being displaced along the cantilever 44, and the steel cable 311 is wound up. In this way, the locking block 315 is reciprocated from the pressing position to the return position to push the control slider 419 to be displaced (ascended). When the locking block 315 is displaced to the return position, the pressing portion 431 of the control slider 419 presses the first extension portion 533 so that the return member 531 pivots. The second extension portion 535 of the return member 531 presses the linkage slider 451 to be displaced from the forward position (as Figure 8 shown) to the backward position (as Figure 9 shown), and when the linkage slider 451 is displaced to the backward position, the release member 537 is biased by the second return spring 555 so that the bolt 559 of the blocking device 557 can protrude to the extended position to block the linkage slider 451, so that the linkage slider 451 is temporarily held in the backward position.

[0049] When the linkage slider 451 is in the backward position, the lower opening 512 is opened, so the steel cable 311 can be operated to be released, so that the locking block 315 is displaced from the return position to the lifting position. The heights of the locking block 315, the lifting hook 313, and the heavy object can be lowered, and the control slider 419 is moved to the bottom end 511C of the control track 511B under the action of the first return spring 511E. Refer to Figure 11As shown, during the displacement of the locking block 315 from the return position to the lifting position, the locking block 315 presses against the release lever 539 to pivot the release member 537. The flange 551 of the release member 537 presses against the passive portion 573 of the blocking device 557, causing the bolt 559 to displace from the extended position to the retracted position below the linkage slider 451. In this way, the linkage slider 451 is biased by the push spring 560 to displace from the retracted position to the preparatory position and abut against the vertical segments of the two extension arms 435 of the control slider 419 (as Figure 5 shown). Since the lower opening 512 is not closed when the linkage slider 451 is in the preparatory position, the locking block 315 can move to the lifting position, and further, the suspended heavy object can be unloaded to the ground.

[0050] In this way, an operation of suspending a heavy object from outside the house to inside the house is successfully completed. When the heavy object needs to be suspended again, the control tower 67 needs to be pushed to the position where the stop lever 76 and the hook plate 64 are engaged again (the first end 45 of the cantilever 44).

[0051] Through the arrangement of the linkage slider 451, the hook release member 459 and the connecting rod 577 on the control tower 67 of the crane 11, the control tower 67 can be released by winding or releasing the steel cable 311, so that the suspension operation in which the heavy object cannot displace relative to the cantilever 44 but the height of the heavy object can be changed is changed to a moving operation in which the height of the heavy object cannot be changed but can displace relative to the cantilever 44, which has better convenience in use.

[0052] With the technical feature that the lower opening 512 is closed when the linkage slider 451 displaces to the forward position and the locking block 315 is located above the linkage slider 451, it is ensured that the suspended heavy object will not fall due to the loosening of the steel cable 311 when the crane 11 performs a moving operation, which has better safety in use.

[0053] The above description is illustrative rather than restrictive to the present invention. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the claims, but all will fall within the protection scope of the present invention.

Claims

1. An automatically decoupling crane, characterized in that, include: a cantilever; A hook plate is pivoted on the cantilever, and the hook plate can be pivoted to a hooked position or a unhooked position; A control tower is movably coupled to the cantilever, the control tower comprises a stopper bar capable of being coupled to the hook plate and a guide pulley, the control tower further comprises a linkage slider capable of being displaced to a retreat position, a forward position or a preparatory position, the control tower further comprises a decoupling member pivotally connected to the linkage slider, when the hook plate is in a hooked position and coupled to the stopper bar, the control tower cannot move along the cantilever, when the hook plate is in a decoupling position or is separated from the stopper bar, the control tower can move along the cantilever; A connecting rod including a connecting end connected to the hook plate and a terminal end; a steel cable passing through the control tower and resting against the guide pulley; A hook attached to one end of the steel cable; A latch block is combined with the steel cable and adjacent to the hook, and the steel cable is reeled in or released to link the latch block displacement. The latch block can be displaced to a lifting position, a pressing position, a releasing position or a returning position. When the latch block is in the lifting position, the linkage slider is in the preparation position, the unhooking member is separated from the end of the connecting rod, and the hook plate is in the hooking position and combined with the stop rod. When the latch block is in the releasing position, the linkage slider is displaced to the forward position, the unhooking member is combined with the end of the connecting rod, and the hook plate is in the hooking position and combined with the stop rod. When the latch block is in the pressing position, the hook plate is located at the unhooking position and separated from the stop rod, and the control tower can move along the cantilever. When the latch block is in the returning position, the linkage slider is in the retreat position, the unhooking member is separated from the end of the connecting rod, and the hook plate is in one of the hooking position and the stop rod. When the latch block is displaced from the returning position to the lifting position, the linkage slider is displaced to the preparation position.

2. The automatically detachable crane according to claim 1, characterized in that, The control tower also includes: A blocking device includes a latch that moves to an extended position or a retracted position. When the linkage slider is in a retracted position, the latch is in the extended position to position the linkage slider in the retracted position. When the linkage slider is in an advanced position or a preparatory position, the latch is in the retracted position to allow the linkage slider to move.

3. The crane capable of automatically decoupling according to claim 2, characterized in that, The control tower also includes: A rotatable release member includes a release paddle and a flange, and the latch also includes a passive part that is linked to the flange. When the latch block moves from the return position to the lifting position, the latch block presses the release paddle to pivot the release member, and the flange presses the passive part to move, and the latch moves from the extended position to the retracted position.

4. The automatically decouplable crane according to claim 1 or 2, characterized in that, The control tower also includes: A movable control slider, the control slider comprising a pressing portion, the latch block moves to a release position, a pressing position or a return position to link the control slider to move together; A rotatable return member, the return member including a first extension portion and a second extension portion. When the locking block is displaced to the return position, the pressing portion of the control slider presses against the first extension portion of the return member to cause the return member to pivot, and the second extension portion pushes the linkage slider located at the forward position back to the backward position.

5. The crane capable of automatic decoupling according to claim 4, characterized in that, The control slider further includes an extension arm. The locking block presses against the extension arm to push the control slider to displace, and the linkage slider abuts against the extension arm when located at the standby position.

6. The automatically detachable crane according to claim 5, characterized in that, The extension arm includes a horizontal portion and a vertical portion connected to the end of the horizontal portion. The locking block abuts against the horizontal portion of the extension arm to push the control slider to displace, and the linkage slider abuts against the vertical portion of the extension arm when located at the standby position.

7. The automatically detachable crane according to claim 1, wherein The decoupling member further includes a pressing plate that pivots together. The pressing plate includes an opening corresponding to the notch. When the linkage slider is located at the backward position or the standby position, the pressing plate is located outside the moving path of the locking block. When the linkage slider is located at the forward position, the pressing plate is located on the moving path of the locking block. When the locking block is located at the pressing position, the locking block presses against the pressing plate to cause the decoupling member to pivot.

8. The automatically detachable crane according to claim 1, characterized in that, The control tower includes: A bracket, the bracket including a linkage track, and the linkage slider is slidably combined with the linkage track. The linkage slider further includes a mounting portion; A pull handle, slidably combined with the bracket, and the end of the pull handle is combined with the mounting portion of the linkage slider; A pushing spring, sleeved outside the pull handle and located between the mounting portion and the bracket, and the pushing spring biases the linkage slider toward the forward position.

9. The automatically detachable crane according to claim 8, characterized in that, The control tower includes a lower opening, and the locking block can displace between the lifting position and the release position through the lower opening. When the linkage slider is located at the forward position, the locking block is located above the linkage slider and the lower opening is closed by the linkage slider, and the locking block cannot displace to the lifting position.

Images