A crane winch with a self-locking function

Abstract

The present invention relates to the technical field of crane winches, and particularly relates to a crane winch with a self-locking function, which includes a mounting frame, a storage shaft, a self-locking device, and a driving device; the mounting frame is fixedly installed with the crane, and a storage cavity for placing the winch rope is formed in the middle of the mounting frame; the middle part of the storage shaft is located in the storage cavity, both ends of the storage shaft penetrate through the mounting frame and are rotatably connected to the mounting frame; the self-locking device includes a mechanical locking component and a control component; the mechanical locking component is installed on the storage shaft; the control component is fixedly installed on the mounting frame, and the control component and the mechanical locking component are located on the same side of the mounting frame; the control component controls the mechanical locking component to lock the storage shaft. Through the above technical solution, when lifting or carrying heavy objects for a long time, a self-locking effect can be safely and effectively provided, avoiding potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of crane winches, and particularly to a crane winch with a self-locking function. Background Art

[0002] A crane refers to a multi-action lifting machine that vertically lifts and horizontally transports heavy objects within a certain range. A very important part of a crane is the winch device, and generally, the heavy object is transported through the winch. The winch in the prior art includes a mounting frame, a storage shaft, and a driving device. By controlling the rotation of the storage shaft through the driving device, during the rotation process, the winch rope on the storage shaft is retracted or extended, realizing the lifting and transportation functions.

[0003] During the lifting or transportation process, it is often necessary to control the heavy object being transported to stay at a certain height or prevent it from falling. In the prior art, a brake disc is provided at one end of the storage shaft. When it is necessary to stop, the rotation of the storage shaft is generally controlled by friction. However, during long-term operation, this method will cause wear and is prone to safety hazards. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a crane winch with a self-locking function, which can safely and effectively provide a self-locking effect during long-term lifting or transportation of heavy objects, avoiding potential safety hazards.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the embodiments of the present application provide a crane winch with a self-locking function, including a mounting frame, a storage shaft, a self-locking device, and a driving device; the mounting frame is fixedly installed on the crane, and a storage cavity for placing the winch rope is formed in the middle of the mounting frame; the middle of the storage shaft is located in the storage cavity, both ends of the storage shaft pass through the mounting frame and are rotatably connected to the mounting frame; the self-locking device includes a mechanical locking component and a control component; the mechanical locking component is installed on the storage shaft; the control component is fixedly installed on the mounting frame, and the control component and the mechanical locking component are located on the same side of the mounting frame; the control component controls the mechanical locking component to lock the storage shaft.

[0008] Preferably, the mechanical locking assembly includes a support disc, a ratchet wheel, a pawl, and a support bushing; the support disc is sleeved on the storage shaft and is rotatably connected to the storage shaft, and a circular rotation cavity is formed on one side surface of the support disc; part of the ratchet wheel is located in the rotation cavity and part is located outside the rotation cavity, and the ratchet wheel is fixedly connected to the storage shaft; the support bushing is fixedly installed on the support disc, the support bushing is located outside the rotation cavity, and a plurality of support bushings are arranged at equal angles in the circumferential direction with the storage shaft as the center; a pawl is rotatably connected to each support bushing, and the free end of each pawl can engage with the ratchet wheel; a torsion spring is sleeved outside the support bushing, and the two ends of the torsion spring are respectively connected to the support disc and the pawl, and the torsion spring controls the pawl to elastically abut against the ratchet wheel; an installation hole is formed in the support bushing, a locking member is arranged in the installation hole, and the locking member cooperates with the control assembly to limit the rotation of the support disc.

[0009] Preferably, a support cover plate is arranged on one side surface of the support disc close to the control assembly, and a support hole is formed in the support cover plate. A plurality of support holes are arranged at equal angles in the circumferential direction with the storage shaft as the center, and each locking member passes through one support hole.

[0010] Preferably, the locking member includes a first limiting ring, a first locking column, and a first spring; the first limiting ring is threadedly connected to the outside of the support bushing, the first limiting ring abuts against the support hole, and the inner diameter of the first limiting ring is smaller than the diameter of the installation hole; a first guiding ring is fixedly arranged on the outer side wall of the first locking column near one end, the first guiding ring is located in the installation hole and is slidably connected to the installation hole; one end of the first locking column far from the first guiding ring passes through the first limiting ring; the first spring is a compression spring, one end of the first spring abuts against the bottom of the installation hole, and the other end abuts against the first locking column; the outer end of the first locking column remains passing through the support hole under the action of the first spring.

[0011] Preferably, the control component includes a mounting base, a first locking disc and a telescopic member; the mounting base is sleeved outside the storage shaft, the mounting base includes a mounting plate and a support sleeve, the mounting plate is fixed on the mounting frame, and the support sleeve is fixed on the mounting plate; a guide sleeve is fixed in the middle of the first locking disc, and one end of the guide sleeve away from the first locking disc is slidably sleeved outside the support sleeve; at least one first track is arranged on the outer side of the support sleeve along the axial direction, and at least one second track is arranged on the inner side of the guide sleeve along the axial direction, and the first track and the second track are mutually engaged; a first locking hole is formed on one side surface of the first locking disc close to the first locking column, and a plurality of first locking holes are arranged at intervals in the circumferential direction with the storage shaft as the center of the circle, and the plurality of first locking holes correspond to the plurality of first locking columns one by one; the fixed end of the telescopic member is mounted on the mounting base, and the telescopic end of the telescopic member is connected to the first locking disc. When the telescopic member extends, the first locking disc is controlled to move a set distance away from the mounting base, and the first locking column can abut in the first locking hole.

[0012] Preferably, the locking member includes a second limiting ring, a second locking column and a second spring; the second limiting ring is threadedly connected to the outer side of the support shaft sleeve, the second limiting ring abuts in the support hole, and the inner diameter of the second limiting ring is smaller than the diameter of the mounting hole; a second guide ring is fixedly arranged on the outer side wall of the second locking column near one end, the second guide ring is located in the mounting hole and is slidably connected to the mounting hole; one end of the second locking column away from the second guide ring passes through the second limiting ring; a locking ring and an attracting ring are fixed on the side wall of the second locking column away from the second guide ring, the attracting ring is located on one side surface of the locking ring away from the second guide ring, and the outer diameter of the attracting ring is smaller than the outer diameter of the locking ring, and the attracting ring is made of a magnetic material; the second spring is a compression spring, the second spring is sleeved on the second locking column, one end abuts against the second limiting ring, and the other end abuts against the second guide ring.

[0013] Preferably, the control component includes a second locking disc and an electromagnet; one side surface of the second locking disc is fixed on the mounting frame, and the second locking disc is sleeved outside the storage shaft. A second locking hole is formed on one side surface of the second locking disc close to the second locking column, and a plurality of second locking holes are arranged at intervals in the circumferential direction with the storage shaft as the center of the circle, and the plurality of second locking holes correspond to the plurality of second locking columns one by one; the electromagnet is fixed on the second locking disc and is located on the side surface close to the mounting frame, and one electromagnet is arranged at each second locking hole; when the electromagnet is energized, the electromagnet attracts the attracting ring, and the end of the second locking column can overcome the elastic force of the second spring and enter the second locking hole.

[0014] Preferably, a rotational speed sensor is provided on the mounting bracket or the control component. The rotational speed sensor is located near the receiving shaft, and the rotational speed sensor detects the rotational speed of the receiving shaft. When the detected rotational speed is greater than a set value, the control component controls the mechanical locking component to lock the receiving shaft.

[0015] Preferably, the mechanical locking component is located outside the mounting bracket.

[0016] Preferably, the driving device includes a driving motor and a speed reducer. The output shaft of the driving motor is connected to the speed reducer, and the output shaft of the speed reducer is connected to the receiving shaft.

[0017] (III) Beneficial Effects

[0018] The present invention provides a crane winch with a self-locking function. By providing a mounting bracket, a receiving shaft, a self-locking device, and a driving device, when lifting or transporting heavy objects, a self-locking effect can be safely and effectively provided, avoiding potential safety hazards. The self-locking device of the present application includes a mechanical locking component and a control component. The mechanical locking component is installed on the receiving shaft, and the control component is arranged on the mounting bracket. When self-locking is required, a self-locking effect is formed through the cooperation of the control component and the mechanical locking component. Inside the mechanical locking component, through the provided rotatable support disc and fixed ratchet wheel, when self-locking is required, the locking piece on the support disc is inserted into the control component to lock the support disc, making it in a static state. During the static process, the ratchet wheel and the pawl achieve the self-locking function. When self-locking is not required, the locking piece disengages from the control component, enabling the receiving shaft and the mechanical locking component to rotate synchronously, and the ratchet wheel and the pawl are relatively stationary. During the lifting process, noise can be reduced, and at the same time, the lifting resistance can be decreased. Finally, by providing a rotational speed sensor in the present application, the rotational speed of the receiving shaft can be monitored in real time. Based on the detection of the rotational speed, the control component controls the mechanical locking component to achieve the self-locking function, greatly reducing potential safety hazards. Description of the Drawings

[0019] Figure 1 is an overall schematic diagram of a crane winch with a self-locking function according to the present invention;

[0020] Figure 2 is a cross-sectional view highlighting the positional relationship between the mechanical locking component and the control component according to the present invention;

[0021] Figure 3 is a cross-sectional view highlighting the mechanical locking component in the first embodiment of the present invention;

[0022] Figure 4 is for highlighting in the present invention Figure 3 an enlarged view of structure A;

[0023] Figure 5 Cross-sectional view of the prominent support disc of the present invention;

[0024] Figure 6 Schematic diagram of the positional relationship among the prominent support disc, ratchet wheel and ratchet pawl of the present invention;

[0025] Figure 7 Cross-sectional view of the prominent locking member in the first embodiment of the present invention;

[0026] Figure 8 Cross-sectional view of the connection structure between the prominent support sleeve and the guide sleeve in the first embodiment of the present invention;

[0027] Figure 9 Cross-sectional view of the prominent mechanical locking assembly in the second embodiment of the present invention;

[0028] Figure 10 For the present invention prominent Figure 9 Enlarged view of structure B therein;

[0029] Figure 11 Cross-sectional view of the prominent locking member in the second embodiment of the present invention.

[0030] Reference numerals in the drawings:

[0031] 100, mounting bracket; 110, storage cavity; 200, storage shaft; 300, driving device; 310, driving motor; 320, speed reducer; 400, mechanical locking assembly; 410, support disc; 411, central hole; 412, rotating cavity; 420, ratchet wheel; 421, mounting shaft sleeve; 430, ratchet pawl; 440, support shaft sleeve; 441, mounting hole; 450, torsion spring; 460, locking member; 461, first limiting ring; 462, first locking column; 4621, first guiding ring; 463, first spring; 464, second limiting ring; 465, second locking column; 4651, second guiding ring; 4652, locking ring; 4653, attracting ring; 466, second spring; 470, support cover plate; 471, support hole; 500, control assembly; 510, mounting seat; 511, mounting plate; 512, support sleeve; 513, first track; 520, first locking disc; 521, guide sleeve; 522, second track; 523, first locking hole; 530, telescopic member; 540, second locking disc; 541, second locking hole; 550, electromagnet; 600, rotational speed sensor. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] First Embodiment

[0034] The present invention provides a winch for a crane with a self-locking function. Refer to Figure 1 , which includes a mounting frame 100, a storage shaft 200, a self-locking device, and a driving device 300. Among them, the mounting frame 100 is used for fixed installation with the crane. A storage cavity 110 for winding the winch rope is formed in the middle of the mounting frame 100, and openings are formed on both side surfaces of the mounting frame 100 in the length direction. The middle part of the storage shaft 200 is located in the storage cavity 110 and is used for winding the winch rope. Both ends of the storage shaft 200 pass through the mounting frame 100 and are rotatably connected to the mounting frame 100. The driving device 300 is connected to one end of the storage shaft 200 and controls the rotation of the storage shaft 200 to work.

[0035] Refer to Figures 2 - 8 , in order to further improve the safety of the winch during operation, a self-locking device is provided between the mounting frame 100 and the storage shaft 200, so that the winch has the self-locking ability during the working process or when hanging heavy objects.

[0036] Specifically, the self-locking device includes a mechanical locking component 400 and a control component 500. The mechanical locking component 400 is installed on the storage shaft 200. The control component 500 is fixedly installed on the mounting frame 100, and the control component 500 and the mechanical locking component 400 are located on the same side of the mounting frame 100. The control component 500 controls the mechanical locking component 400 to lock the storage shaft 200.

[0037] Specifically, the mechanical locking component 400 includes a support disc 410, a ratchet 420, a pawl 430, and a support bushing 440.

[0038] The support disc 410 is circular in shape, with a central hole 411 formed in the middle. The support disc 410 is sleeved on the storage shaft 200 and is rotatably connected to the storage shaft 200. A circular rotation cavity 412 is formed on one side surface of the support disc 410, where the rotation cavity 412 is centered on the axis of the storage shaft 200. Part of the ratchet 420 is located inside the rotation cavity 412, and part is located outside the rotation cavity 412. The ratchet 420 is fixedly connected to the storage shaft 200. Specifically, a mounting bushing 421 is fixed at the central position of the ratchet 420, and the support disc 410 can be rotatably connected to the outside of the mounting bushing 421 through a bearing. During the working process, it is ensured that the support disc 410 has no displacement in the axial direction.

[0039] The support bushing 440 is fixedly installed on the support disc 410. The support bushing 440 is located outside the rotating cavity 412, and a plurality of them are arranged at equal angles in the circumferential direction centered on the receiving shaft 200. A pawl 430 is rotatably connected to each support bushing 440, and the free ends of the pawls 430 can all engage with the ratchet wheel 420. A torsion spring 450 is sleeved outside the support bushing 440, and the two ends of the torsion spring 450 are respectively connected to the support disc 410 and the pawl 430. The torsion spring 450 controls the pawl 430 to keep elastically abutted against the ratchet wheel 420. During the working process, when the receiving shaft 200 retracts the winch rope, that is, when lifting, the rotation direction of the receiving shaft 200 is defined as the forward rotation at this time. When rotating forward, the ratchet wheel 420 can rotate relative to the pawl 430. When the receiving shaft 200 rotates reversely, the ratchet wheel 420 is blocked by the pawl 430. When the support disc 410 is not locked, although the ratchet wheel 420 is blocked by the pawl 430, the support disc 410 drives the pawl 430 and the ratchet wheel 420 to rotate synchronously in the reverse direction. When the support disc 410 is locked, the support disc 410 cannot rotate. At this time, the pawl 430 self-locks the ratchet wheel 420. After self-locking, the receiving shaft 200 can still rotate forward, but cannot rotate reversely.

[0040] An installation hole 441 is formed in the support bushing 440, and a locking member 460 is arranged in the installation hole 441. The locking member 460 cooperates with the control assembly 500 to restrict the rotation of the support disc 410. The restriction in this article specifically refers to: the support disc 410 remains stationary and cannot rotate with the receiving shaft 200.

[0041] A support cover plate 470 is arranged on one side of the support disc 410 close to the control assembly 500, and the support cover plate 470 is fixed on the support disc 410. A support hole 471 is formed in the support cover plate 470, and a plurality of support holes 471 are arranged at equal angles in the circumferential direction centered on the receiving shaft 200. Each locking member 460 passes through a support hole 471. During the self-locking process, each locking member 460 can be supported through the support hole 471, avoiding excessive bending of the locking member 460 during the working process. The safety and service life of the locking member 460 are improved.

[0042] In one embodiment, the locking member 460 includes a first limiting ring 461, a first locking column 462 and a first spring 463. The first limiting ring 461 is threadedly connected to the outside of the support bushing 440, and the first limiting ring 461 abuts in the support hole 471. Specifically, the first limiting ring 461 is tightly abutted against the support hole 471. When self-locking, the first limiting ring 461 applies a force to the support hole 471 for the purpose of protection.

[0043] The inner diameter of the first limiting ring 461 is smaller than the diameter of the mounting hole 441; a first guiding ring 4621 is fixedly arranged on the outer side wall of the first locking post 462 near one end. The first guiding ring 4621 is located in the mounting hole 441 and is slidably connected to the mounting hole 441; one end of the first locking post 462 away from the first guiding ring 4621 passes through the first limiting ring 461. The first spring 463 is a compression spring. One end of the first spring 463 abuts against the bottom of the mounting hole 441, and the other end abuts against the end of the first locking post 462; the outer end of the first locking post 462 is kept in a state of passing through the support hole 471 under the action of the first spring 463. When the control assembly 500 locks the first locking post 462, the first locking post 462 will limit the rotation of the support disc 410.

[0044] The control assembly 500 includes a mounting base 510, a first locking disc 520 and a telescopic member 530.

[0045] Among them, the mounting base 510 is sleeved on the outer side of the receiving shaft 200. The mounting base 510 includes a mounting plate 511 and a support sleeve 512. The mounting plate 511 is fixed on the mounting frame 100, and the support sleeve 512 is fixed on the mounting plate 511. A guiding sleeve 521 is fixed in the middle of the first locking disc 520. One end of the guiding sleeve 521 away from the first locking disc 520 is slidably sleeved on the outer side of the support sleeve 512; at least one first track 513 is arranged on the outer side of the support sleeve 512 along the axial direction, and at least one second track 522 is arranged on the inner side of the guiding sleeve 521 along the axial direction. The first track 513 and the second track 522 are mutually engaged; among them, the forms of the first track 513 and the second track 522 are not limited, as long as they can be mutually engaged. When they are mutually engaged, the guiding sleeve 521 and the support sleeve 512 cannot rotate relative to each other and can only slide relative to each other in a straight line. Through this setting, when self-locking, the first locking disc 520 can be kept from rotating, ensuring the safety of self-locking.

[0046] Further, a first locking hole 523 is formed on a side surface of the first locking disk 520 close to the first locking post 462. A plurality of first locking holes 523 are arranged at intervals in the circumferential direction centered on the receiving shaft 200, and the plurality of first locking holes 523 correspond to the plurality of first locking posts 462 one by one. The fixed end of the telescopic member 530 is fixedly installed on the mounting seat 510, and the telescopic end of the telescopic member 530 is connected to the first locking disk 520, and the specific connection position is not limited herein. When the telescopic member 530 extends, it can control the first locking disk 520 to move a set distance away from the mounting seat 510, and the first locking post 462 can abut against the first locking hole 523. Specifically, when the first locking disk 520 moves a set distance, if the rotation position of the first locking post 462 is not aligned with the first locking hole 523, at this time, the first locking post 462 is pressed, so that it slides into the mounting hole 441. At this time, the support disk 410 will rotate a certain angle. When the first locking post 462 is aligned with the first locking hole 523, under the elastic force of the first spring 463, the first locking post 462 will quickly extend and enter the first locking hole 523 for locking. Among them, the telescopic member 530 can be a cylinder, an electric push rod or a lead screw structure that can move linearly quickly, and the specific type is not limited.

[0047] At least one rotation speed sensor 600 is provided on the mounting frame 100 or the control assembly 500. The rotation speed sensor 600 is located close to the receiving shaft 200, and the rotation speed sensor 600 detects the rotation speed of the receiving shaft 200. When the detected rotation speed is greater than the set value, the control assembly 500 controls the mechanical locking assembly 400 to lock the receiving shaft 200. For the setting of the set value, Case 1: When the receiving shaft 200 rotates forward during operation, the receiving shaft 200 can be selectively locked; Case 2: When the receiving shaft 200 rotates forward during operation, when the rotation speed sensor 600 detects that the receiving shaft 200 rotates in the reverse direction, the receiving shaft 200 is locked immediately. Case 3: When the driving device 300 controls the receiving shaft 200 to rotate in the reverse direction during operation, at this time, the normal rotation speed of the receiving shaft 200 is the first rotation speed. When the rotation speed sensor 600 detects that the rotation speed of the receiving shaft 200 is greater than the first rotation speed, the receiving shaft 200 is locked immediately. Case 4: When hovering, self-locking is performed. Through this setting, when the device fails and causes the heavy object suspended by the winch rope to fall rapidly, it can be quickly detected and automatically locked.

[0048] In order to avoid interfering with the winch rope, the mechanical locking assembly 400 is arranged outside the mounting frame 100.

[0049] The driving device 300 includes a driving motor 310 and a speed reducer 320. The output shaft of the driving motor 310 is connected to the speed reducer 320, and the output shaft of the speed reducer 320 is connected to the receiving shaft 200. Among them, the driving motor 310 and the speed reducer 320 can adopt mature devices purchased on the market, and the specific type is not limited herein.

[0050] The present invention provides a crane winch with a self-locking function, which has two working modes when lifting heavy objects, including a safety mode and a low-noise mode.

[0051] In the safety mode, when the crane controls the winch to lift a heavy object, the self-locking device remains in the self-locking state. During this process, the winch can lift the heavy object. When hovering, the self-locking device can automatically lock to achieve the effect of preventing falling. In the low-noise mode, when the crane controls the winch to lift a heavy object, the mechanical locking component 400 and the control component 500 are in a separated state. At this time, the rotation speed of the storage shaft 200 is detected by the rotation speed sensor 600. In different states, when the detected rotation speed is greater than the set value, the control component 500 controls the mechanical locking component 400 to lock the storage shaft 200, otherwise it is in an unlocked state.

[0052] The present invention provides a crane winch with a self-locking function. By providing the mounting frame 100, the storage shaft 200, the self-locking device and the driving device 300, when lifting or transporting heavy objects, it can safely and effectively provide a self-locking effect to avoid potential safety hazards. The self-locking device of the present application includes a mechanical locking component 400 and a control component 500. The mechanical locking component 400 is installed on the storage shaft 200, and the control component 500 is arranged on the mounting frame 100. When self-locking is required, a self-locking effect is formed through the cooperation of the control component 500 and the mechanical locking component 400. Inside the mechanical locking component 400, through the provided rotatable support disk 410 and the fixed ratchet wheel 420, when self-locking is required, the locking part 460 on the support disk 410 is inserted into the control component 500 to lock the support disk 410 and make it static. During the static process, the ratchet wheel 420 and the pawl 430 achieve the self-locking function. When self-locking is not required, the locking part 460 disengages from the control component 500, so that the storage shaft 200 and the mechanical locking component 400 rotate synchronously, and the ratchet wheel 420 and the pawl 430 are relatively static. During the lifting process, the noise can be reduced and the lifting resistance can be decreased. Finally, by providing the rotation speed sensor 600 in the present application, the rotation speed of the storage shaft 200 can be monitored in real time. Based on the detection of the rotation speed, the control component 500 controls the mechanical locking component 400 to achieve the self-locking function, greatly reducing potential safety hazards.

[0053] Second Embodiment

[0054] See Figures 9 - 11 , the difference between this embodiment and the first embodiment lies in the locking part 460 and the control component 500. During operation, the rotation of the support disk 410 can be restricted by different control methods.

[0055] Specifically, the locking member 460 includes a second limiting ring 464, a second locking post 465, and a second spring 466.

[0056] Among them, the second limiting ring 464 is threadedly connected to the outer side of the support bushing 440, the second limiting ring 464 abuts against the inside of the support hole 471, and the inner diameter of the second limiting ring 464 is smaller than the diameter of the mounting hole 441; on the outer side wall near one end of the second locking post 465, a second guiding ring 4651 is fixedly arranged, the second guiding ring 4651 is located in the mounting hole 441 and is slidably connected to the mounting hole 441; at this position, the second limiting ring 464 also plays a supporting role and limits the second guiding ring 4651 in the mounting hole 441 at the same time.

[0057] One end of the second locking post 465 away from the second guiding ring 4651 passes through the second limiting ring 464; on the side wall of the end of the second locking post 465 away from the second guiding ring 4651, a locking ring 4652 and an attracting ring 4653 are fixedly arranged, the attracting ring 4653 is located on one side surface of the locking ring 4652 away from the second guiding ring 4651, and the outer diameter of the attracting ring 4653 is smaller than the outer diameter of the locking ring 4652, and the attracting ring 4653 is made of a magnetic attracting material. The second spring 466 is a compression spring, the second spring 466 is sleeved on the second locking post 465, one end abuts against the second limiting ring 464, and the other end abuts against the second guiding ring 4651. By controlling the size of the attracting ring 4653, when locking, the attracting ring 4653 is only attracted and provides an outward moving force for the second locking post 465.

[0058] The control assembly 500 includes a second locking disc 540 and an electromagnet 550; one side surface of the second locking disc 540 is fixedly arranged on the mounting frame 100, and the second locking disc 540 is sleeved on the outer side of the receiving shaft 200. On the side surface of the second locking disc 540 close to the second locking post 465, a second locking hole 541 is opened. A plurality of second locking holes 541 are arranged at intervals in the circumferential direction with the receiving shaft 200 as the center, and the plurality of second locking holes 541 correspond to the plurality of second locking posts 465 one by one.

[0059] The electromagnet 550 is fixedly arranged on the second locking disc 540 and is located on the side surface close to the mounting frame 100. An electromagnet 550 is arranged at each second locking hole 541; when the electromagnet 550 is energized, the electromagnet 550 generates an attractive force on the attracting ring 4653, and the end of the second locking post 465 can overcome the elastic force of the second spring 466 and enter the second locking hole 541. When it enters the second locking hole 541, the locking ring 4652 and the second locking hole 541 are tightly abutted for locking.

[0060] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0061] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0062] The above-described embodiments only represent the implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A crane winch with a self-locking function, characterized in that: It includes a mounting bracket (100), a storage shaft (200), a self-locking device, and a driving device (300); the mounting bracket (100) is fixedly installed on the crane, and a storage cavity (110) for placing the winch rope is formed in the middle of the mounting bracket (100); the middle part of the storage shaft (200) is located in the storage cavity (110), and both ends of the storage shaft (200) pass through the mounting bracket (100) and are rotatably connected to the mounting bracket (100); the self-locking device includes a mechanical locking component (400) and a control component (500); the mechanical locking component (400) is installed on the storage shaft (200); the control component (500) is fixedly installed on the mounting bracket (100), and the control component (500) and the mechanical locking component (400) are located on the same side of the mounting bracket (100); the control component (500) controls the mechanical locking component (400) to lock the storage shaft (200). The mechanical locking component (400) includes a support disc (410), a ratchet wheel (420), a pawl (430), and a support shaft sleeve (440). The support disc (410) is sleeved on the storage shaft (200) and is rotatably connected to the storage shaft (200); a circular rotation cavity (412) is formed on one side surface of the support disc (410); part of the ratchet wheel (420) is located inside the rotation cavity (412), and part is located outside the rotation cavity (412), and the ratchet wheel (420) is fixedly connected to the storage shaft (200). The support shaft sleeve (440) is fixedly installed on the support disc (410), the support shaft sleeve (440) is located outside the rotation cavity (412), and a plurality of them are arranged at equal angles in the circumferential direction with the storage shaft (200) as the center; a pawl (430) is rotatably connected to each support shaft sleeve (440), and the free end of the pawl (430) can engage with the ratchet wheel (420); a torsion spring (450) is sleeved outside the support shaft sleeve (440), and both ends of the torsion spring (450) are respectively connected to the support disc (410) and the pawl (430), and the torsion spring (450) controls the pawl (430) to elastically abut against the ratchet wheel (420). An installation hole (441) is formed in the support shaft sleeve (440), a locking member (460) is arranged in the installation hole (441), and the locking member (460) cooperates with the control component (500) to limit the rotation of the support disc (410). A support cover plate (470) is arranged on one side surface of the support disc (410) close to the control component (500), and a support hole (471) is formed in the support cover plate (470), and a plurality of support holes (471) are arranged at equal angles in the circumferential direction with the storage shaft (200) as the center, and each locking member (460) passes through one support hole (471).

2. The winch of a crane with a self-locking function according to claim 1, characterized in that: The locking member (460) includes a first limiting ring (461), a first locking post (462) and a first spring (463); The first limiting ring (461) is threadedly connected to the outer side of the support bushing (440), the first limiting ring (461) abuts against the inside of the support hole (471), and the inner diameter of the first limiting ring (461) is smaller than the diameter of the mounting hole (441); A first guiding ring (4621) is fixedly arranged on the outer side wall of the first locking post (462) near one end thereof, the first guiding ring (4621) is located in the mounting hole (441) and is slidably connected to the mounting hole (441); One end of the first locking post (462) away from the first guiding ring (4621) passes through the first limiting ring (461). The first spring (463) is a compression spring, one end of the first spring (463) abuts against the bottom of the mounting hole (441), and the other end abuts against the first locking post (462); The outer end of the first locking post (462) is kept passing through the support hole (471) under the action of the first spring (463).

3. A winch for a crane with a self-locking function according to claim 2, characterized in that: The control assembly (500) includes a mounting base (510), a first locking disc (520) and an expansion member (530); The mounting base (510) is sleeved on the outer side of the receiving shaft (200), the mounting base (510) includes a mounting plate (511) and a support sleeve (512), the mounting plate (511) is fixed on the mounting frame (100), and the support sleeve (512) is fixed on the mounting plate (511); A guiding sleeve (521) is fixed in the middle of the first locking disc (520), and one end of the guiding sleeve (521) away from the first locking disc (520) is slidably sleeved on the outer side of the support sleeve (512); At least one first track (513) is arranged along the axial direction on the outer side of the support sleeve (512), at least one second track (522) is arranged along the axial direction on the inner side of the guiding sleeve (521), and the first track (513) and the second track (522) are mutually engaged; A first locking hole (523) is formed on one side surface of the first locking disc (520) close to the first locking post (462), a plurality of the first locking holes (523) are arranged at intervals in the circumferential direction with the receiving shaft (200) as the center, and the plurality of first locking holes (523) correspond to the plurality of first locking posts (462) one by one; The fixed end of the expansion member (530) is mounted on the mounting base (510), the expansion end of the expansion member (530) is connected to the first locking disc (520), when the expansion member (530) extends, the first locking disc (520) is controlled to move a set distance away from the mounting base (510), and at this time the first locking post (462) can abut and enter the first locking hole (523).

4. A winch for a crane with a self-locking function according to claim 1, characterized in that: The locking member (460) includes a second limiting ring (464), a second locking post (465) and a second spring (466); The second limiting ring (464) is threadedly connected to the outside of the support bushing (440). The second limiting ring (464) abuts within the support hole (471), and the inner diameter of the second limiting ring (464) is smaller than the diameter of the mounting hole (441). A second guiding ring (4651) is fixedly arranged on the outer sidewall of the second locking post (465) near one end thereof. The second guiding ring (4651) is located within the mounting hole (441) and is slidably connected to the mounting hole (441). One end of the second locking post (465) away from the second guiding ring (4651) passes through the second limiting ring (464). A locking ring (4652) and an attracting ring (4653) are fixed on the sidewall of the second locking post (465) at the end away from the second guiding ring (4651). The attracting ring (4653) is located on one side surface of the locking ring (4652) away from the second guiding ring (4651), and the outer diameter of the attracting ring (4653) is smaller than the outer diameter of the locking ring (4652). The attracting ring (4653) is made of a magnetic material. The second spring (466) is a compression spring. The second spring (466) is sleeved on the second locking post (465), with one end abutting against the second limiting ring (464) and the other end abutting against the second guiding ring (4651).

5. A winch for a crane with a self-locking function according to claim 4, characterized in that: The control assembly (500) includes a second locking disc (540) and an electromagnet (550). One side surface of the second locking disc (540) is fixed to the mounting frame (100), and the second locking disc (540) is sleeved on the outside of the receiving shaft (200). A second locking hole (541) is formed on one side surface of the second locking disc (540) close to the second locking post (465). A plurality of second locking holes (541) are arranged at intervals in the circumferential direction centered on the receiving shaft (200), and the plurality of second locking holes (541) correspond to the plurality of second locking posts (465) one by one. The electromagnet (550) is fixed to the second locking disc (540) and is located on one side surface close to the mounting frame (100). One electromagnet (550) is arranged at each of the second locking holes (541). When the electromagnet (550) is energized, the electromagnet (550) attracts the attracting ring (4653), and the end of the second locking post (465) can overcome the elastic force of the second spring (466) and enter the second locking hole (541).

6. A winch for a crane with a self-locking function according to any one of claims 1-5, characterized in that: At least one rotation speed sensor (600) is arranged on the mounting frame (100) or the control assembly (500). The rotation speed sensor (600) is located close to the receiving shaft (200), and the rotation speed sensor (600) detects the rotation speed of the receiving shaft (200). When it is detected that the rotation speed is greater than the set value, the control assembly (500) controls the mechanical locking assembly (400) to lock the receiving shaft (200).

7. A winch for a crane with a self-locking function according to claim 1, characterized in that: The mechanical locking assembly (400) is located outside the mounting frame (100).

8. A winch for a crane with a self-locking function according to claim 1, characterized in that: The driving device (300) includes a driving motor (310) and a speed reducer (320). The output shaft of the driving motor (310) is connected to the speed reducer (320), and the output shaft of the speed reducer (320) is connected to the storage shaft (200).

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