CN112660995A

CN112660995A - Gantry crane is with wire rope fracture stability protection's hook assembly

Info

Publication number: CN112660995A
Application number: CN202110054368.6A
Authority: CN
Inventors: 田亚菲
Original assignee: Nanjing Lanzhipin Technology Co ltd
Current assignee: Nanjing Lanzhipin Technology Co ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-04-16

Abstract

The invention discloses a lifting hook device for fracture stability protection of a steel wire rope for a gantry crane, which comprises a machine body, wherein a working cavity is arranged in the machine body, a connecting cavity positioned above the working cavity is arranged in the machine body, a telescopic plate capable of stretching is fixedly arranged on the inner wall of the bottom side of the connecting cavity, and the upper end of the telescopic plate is fixedly arranged on a main beam of the gantry crane.

Description

Gantry crane is with wire rope fracture stability protection's hook assembly

Technical Field

The invention relates to the related field of hoisting equipment, in particular to a lifting hook device for fracture stability protection of a steel wire rope for a gantry crane.

Background

The hoisting equipment starts a vertical or vertical and horizontal working stroke after material taking, unloads the material after reaching a destination, and then moves to a material taking place in an empty stroke to complete a working cycle, and then carries out secondary hoisting or transportation. When using the portal crane to hoist the object during the construction, some object shape irregularity need manual cover on the lifting hook after the rope winding, the operation is inconvenient to the object rocks easily during hoist and mount, and wire rope probably breaks because the carelessness check takes place, and the wire rope fracture is great to engineering and personal safety influence, and prior art hoist and mount efficiency is lower and have certain potential safety hazard.

Disclosure of Invention

Aiming at the technical defects, the invention provides a lifting hook device for stably protecting the fracture of a steel wire rope for a gantry crane, which can overcome the defects.

The invention relates to a lifting hook device for stably protecting the fracture of a steel wire rope for a gantry crane, which comprises a machine body, wherein a working cavity is arranged in the machine body, a connecting cavity is arranged above the working cavity, a telescopic plate capable of being stretched and contracted is fixedly arranged on the inner wall of the bottom side of the connecting cavity, the upper end of the telescopic plate is fixedly arranged on a main beam of the gantry crane, the upper part of the telescopic plate is in sliding fit with the wall body of the machine body, a steel wire rope fracture protection component for preventing the steel wire rope from falling off after the fracture of the steel wire rope is arranged in the working cavity and the connecting cavity, the steel wire rope fracture protection component comprises a supporting plate fixedly arranged on the inner walls of the left side and the right side of the working cavity, a fixing plate fixedly arranged on the upper end of the supporting plate on the top side of the inner wall of the working cavity, the inner walls of the left side and the right side of the working cavity are symmetrically provided with lifting boxes which slide up and down, the lifting boxes and the lifting sleeves are rotatably installed, the inner walls of the left side and the right side of the connecting cavity are symmetrically rotatably installed with moving shafts which extend left and right, the moving shafts are connected with the lifting shafts through bevel gear pairs in a transmission manner, the moving shafts are in threaded connection with moving blocks which are in sliding connection with the inner walls of the bottom side of the connecting cavity left and right, the left ends of the moving blocks on the right sides are fixedly provided with main locking blocks with convex blocks, the right ends of the moving blocks on the left sides are fixedly provided with auxiliary locking blocks which can be matched with the main locking blocks and are provided with convex blocks, the main locking blocks and the auxiliary locking blocks can lock the upper ends of the expansion plates, so that the machine body can not descend any more when the expansion plates do not expand any more, a, can rotate on the connecting axle install with the connecting gear that the fixed plate meshing is connected, be provided with in the connecting gear can with the recess of breach intercommunication, organism bottom fixed mounting has the lifting hook, be provided with in the work intracavity and be used for installing engineering bow tie rope hoist and mount rope installation component on the lifting hook, the hoist and mount component is stabilized to flexible firm rope that prevents to rock after still being provided with and being used for installing to the work intracavity.

Preferably, wire rope fracture protection subassembly still include with backup pad upper end fixed connection's butt spring, butt spring terminal with lift box fixed mounting, slidable mounting in the recess can with breach complex fixture block, the fixture block end be provided with recess inner wall fixed mounting's buffer spring, fixedly connected with driven gear on the connecting axle, driving motor is used in working chamber top side inner wall fixed mounting, the driving shaft that extends about driving motor end is provided with, fixedly connected with can with the face gear that driven gear meshing is connected in the driving shaft.

Preferably, hoist and mount rope installation component include with the screw shaft that the installation just extended from top to bottom is rotated to working chamber bottom side inner wall, the screw shaft with the drive shaft is connected through the belt drive, the backup pad lower extreme is provided with the telescopic link that can stretch out and draw back, telescopic link lower extreme fixed mounting have with screw shaft threaded connection's screw thread piece, the axis of rotation that extends around the screw thread piece internal rotation reaches the installation, fixedly connected with rotating gear in the axis of rotation, working chamber bottom side inner wall fixed mounting has the track board, be provided with the track groove in the track board, sliding mounting has the slider in the track groove, articulated in the axis of rotation have with slider articulated slab, track groove rear end fixed mounting can with the rack plate that rotating gear meshing is connected.

Preferably, the hoisting rope mounting assembly further comprises an output shaft rotatably mounted at the rear end of the thread block and extending forwards and backwards, the output shaft is connected with the rotating shaft through belt transmission, an output mounting plate is fixedly connected to the output shaft, an engineering bowknot rope for hoisting is mounted on the output mounting plate, a linking shaft extending upwards and downwards is rotatably mounted in the support plate, the linking shaft is connected with the screw shaft through belt transmission, a lifting plate is connected to the linking shaft through threads and slidably mounted on the inner wall of the left side of the working cavity, an open slot is formed in the bottom of the machine body, a transition shaft extending leftwards and rightwards is rotatably mounted on the inner wall of the left side of the working cavity, the transition shaft is connected with the linking shaft through bevel gear pair transmission, a linking plate is fixedly mounted at the right end of the lifting plate, and transmission shafts are rotatably mounted on the inner walls, fixedly connected with drive gear on the transmission shaft, the linkage plate right-hand member be provided with can with the cab apron of crossing that the drive gear meshing is connected, fixedly connected with transition gear on the transition shaft, fixedly connected with can plug up on the transmission shaft the transmission baffle of open slot, be provided with the transmission groove in the transmission baffle, the displacement axle of extending about transmission inslot internal rotation is installed, on the displacement axle fixedly connected with can with the displacement gear that the transition gear meshing is connected, on the displacement axle threaded connection have with transmission groove sliding connection's displacement baffle, the displacement baffle can plug up the lifting hook.

Preferably, the rope stabilizing and hoisting assembly comprises a driven block which is in threaded connection with the driving shaft and is in sliding fit with the inner wall of the rear side of the working cavity, a main push rod filled with hydraulic oil is arranged in the lifting hook, a main push rod in sliding fit with the upper part of the hydraulic oil pipe is arranged at the lower end of the driven block, the bottom of the lifting hook is symmetrically provided with sliding chutes in the left and right directions, the sliding chutes are internally provided with displacement blocks in a sliding way, the tail ends of the displacement blocks are provided with driven push rods in sliding fit with the hydraulic oil pipes, an extension spring fixedly arranged with the displacement block is arranged on the inner wall of the sliding groove, a displacement groove is arranged in the displacement block, a displacement plate is arranged in the displacement groove in a sliding way, a return spring fixedly arranged with the inner wall of the displacement groove is arranged at the tail end of the displacement plate, and a limiting block for limiting the rope is fixedly arranged on one side opposite to the displacement plate through a connecting rod, and the lower end of the main beam of the gantry crane is fixedly arranged with the machine body through a wound steel wire rope.

The invention has the beneficial effects that: the device during operation can prevent through main locking piece and follow the locking piece cooperation to the terminal upper portion locking of expansion plate that can stretch out and draw back that the wire rope fracture back hoist and mount thing falls, and the motion that can export the mounting panel makes the rope install on the lifting hook to close the lifting hook through the displacement baffle, can stabilize through the restriction piece rope restriction when hoist and mount, improved hoist and mount safety and stability nature, reduced the work load that the workman hung the rope, improved hoist and mount efficiency.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure A-A of FIG. 1;

FIG. 3 is an enlarged schematic view of B of FIG. 1;

FIG. 4 is an enlarged schematic view of C in FIG. 1;

FIG. 5 is a front view of the screw shaft and the front side of the screw block of FIG. 1;

FIG. 6 is a schematic diagram of the structure of E-E in FIG. 5;

fig. 7 is a left side view of the connection between the connecting gear and the fixing plate in fig. 1.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

The invention will now be described in detail with reference to fig. 1-7, wherein for ease of description the orientations described below are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a lifting hook device for stably protecting the fracture of a steel wire rope for a gantry crane, which comprises a machine body 11, wherein a working cavity 12 is arranged in the machine body 11, a connecting cavity 13 positioned above the working cavity 12 is arranged in the machine body 11, a telescopic plate 14 capable of stretching and retracting is fixedly arranged on the inner wall of the bottom side of the connecting cavity 13, the upper end of the telescopic plate 14 is fixedly arranged on a main beam 15 of the gantry crane, the upper part of the telescopic plate 14 is in sliding fit with the wall body of the machine body 11, steel wire rope fracture protecting components for preventing the steel wire rope from falling off after the steel wire rope is fractured are arranged in the working cavity 12 and the connecting cavity 13, the steel wire rope fracture protecting components comprise supporting plates 74 fixedly arranged on the inner walls of the left side and the right side of the working cavity 12, fixing plates 29 fixedly arranged on the inner wall of the top side of the working cavity 12 are arranged, a lifting sleeve 18 is matched on the lifting shaft 17 through a spline, a lifting box 16 which can slide up and down is symmetrically arranged on the inner wall of the left side and the right side of the working cavity 12, the lifting box 16 and the lifting sleeve 18 are rotatably installed, a moving shaft 19 which can extend left and right is symmetrically and rotatably installed on the inner wall of the left side and the right side of the connecting cavity 13, the moving shaft 19 is in transmission connection with the lifting shaft 17 through a bevel gear pair, a moving block 20 which is in left and right sliding connection with the inner wall of the bottom side of the connecting cavity 13 is in threaded connection with the moving shaft 19, a main locking block 21 with a convex block is fixedly installed at the left end of the moving block 20 at the right end of the moving block at the left side, a secondary locking block 22 which can be matched with the main locking block 21 and has a convex block is fixedly installed at the right end of the moving block 20 at the left side, the main locking block 21 and the, thereby prevent organism 11 to fall, the connecting axle 25 that extends about the relative lateral wall body of cage 16 rotates to install between the wall body, be provided with breach 69 on the connecting axle 25, can rotate on the connecting axle 25 install with the connecting gear 28 that the meshing of fixed plate 29 is connected, be provided with in the connecting gear 28 can with the recess 71 of breach 69 intercommunication, organism 11 bottom fixed mounting has lifting hook 60, be provided with in the working chamber 12 and be used for installing the engineering bow tie rope hoist and mount rope installation component on lifting hook 60, still be provided with in the working chamber 12 and be used for the installation back to the rope that flexible firm prevents to rock and stabilize hoist and mount subassembly.

Beneficially, the steel wire rope breakage protection assembly further comprises an abutting spring 76 fixedly connected with the upper end of the support plate 74, the end of the abutting spring 76 is fixedly installed on the lifting box 16, a fixture block 72 capable of being matched with the notch 69 is slidably installed in the groove 71, the end of the fixture block 72 is provided with a buffer spring 73 fixedly installed on the inner wall of the groove 71, the connecting shaft 25 is fixedly connected with a driven gear 26, the inner wall of the top side of the working cavity 12 is fixedly installed with a driving motor 23, the end of the driving motor 23 is provided with a driving shaft 24 extending up and down, and the driving shaft 24 is fixedly connected with a face gear 27 capable of being meshed and connected with the driven gear 26.

Advantageously, the hoisting rope mounting assembly comprises a screw shaft 30 rotatably mounted with the inner wall of the bottom side of the working chamber 12 and extending up and down, the screw shaft 30 is connected with the driving shaft 24 through belt transmission, the lower end of the supporting plate 74 is provided with a telescopic rod 41 capable of extending and contracting, the lower end of the expansion link 41 is fixedly provided with a thread block 31 which is in threaded connection with the screw shaft 30, a rotating shaft 35 extending forwards and backwards is rotatably mounted in the thread block 31, a rotating gear 37 is fixedly connected to the rotating shaft 35, a track plate 32 is fixedly arranged on the inner wall of the bottom side of the working cavity 12, a track groove 33 is arranged in the track plate 32, a sliding block 34 is slidably mounted in the track groove 33, a hinge plate 36 hinged with the sliding block 34 is hinged on the rotating shaft 35, a rack plate 38 capable of meshing with the rotating gear 37 is fixedly mounted at the rear end of the track groove 33.

Beneficially, the hoisting rope mounting assembly further comprises an output shaft 39 rotatably mounted at the rear end of the thread block 31 and extending back and forth, the output shaft 39 is connected with the rotating shaft 35 through belt transmission, an output mounting plate 40 is fixedly connected to the output shaft 39, an engineering bow tie rope for hoisting is mounted on the output mounting plate 40, a linking shaft 42 extending up and down is rotatably mounted in the support plate 74, the linking shaft 42 is connected with the screw shaft 30 through belt transmission, a lifting plate 43 slidably mounted on the inner wall of the left side of the working cavity 12 is in threaded connection with the linking shaft 42, an open slot 45 is formed in the bottom of the machine body 11, a transition shaft 44 extending left and right is rotatably mounted on the inner wall of the left side of the working cavity 12, the transition shaft 44 is connected with the linking shaft 42 through bevel gear pair transmission, and a linking plate 46 is fixedly mounted at the right end of the lifting plate 43, drive shaft 49 is installed in 45 front and back side inner walls rotation of open slot, fixedly connected with drive gear 50 on the drive shaft 49, the connection board 46 right-hand member be provided with can with the cab apron 47 of crossing that drive gear 50 meshing is connected, fixedly connected with transition gear 48 on the transition axle 44, fixedly connected with can block up on the drive shaft 49 the transmission baffle 51 of open slot 45, be provided with the transmission groove 52 in the transmission baffle 51, the displacement axle 53 that extends about transmission groove 52 internal rotation is installed, fixedly connected with can with the displacement gear 54 that transition gear 48 meshing is connected on the displacement axle 53, threaded connection has on the displacement axle 53 with transmission groove 52 sliding connection's displacement baffle 55, displacement baffle 55 can block up lifting hook 60.

Beneficially, the rope stable hoisting assembly comprises a driven block 57 in threaded connection with the driving shaft 24 and in sliding fit with the inner wall of the rear side of the working chamber 12, a main push rod 58 filled with hydraulic oil is arranged in the lifting hook 60, a main push rod 58 in sliding fit with the upper portion of the hydraulic oil pipe 59 is arranged at the lower end of the driven block 57, sliding grooves 61 are symmetrically arranged at the bottom of the lifting hook 60 in the left-right direction, displacement blocks 63 are slidably mounted in the sliding grooves 61, a driven push rod 62 in sliding fit with the hydraulic oil pipe 59 is arranged at the tail end of the displacement block 63, extension springs 68 fixedly mounted with the displacement blocks 63 are arranged on the inner wall of the sliding grooves 61, displacement grooves 64 are arranged in the displacement blocks 63, displacement plates 67 are slidably mounted in the displacement grooves 64, return springs 65 fixedly mounted with the inner wall of the displacement grooves 64 are arranged at the tail ends of the displacement plates 67, and limiting blocks 66 for, the lower end of the gantry crane main beam 15 is fixedly installed with the machine body 11 through a wound steel wire rope.

The use steps herein are described in detail below with reference to fig. 1-7:

in the initial state, the abutment spring 76 is in a compressed state, the buffer spring 73 and the return spring 65 are in a natural expansion state, the driven gear 26 is engaged with the face gear 27, the rack plate 38 is not engaged with the rotating gear 37, the displacement gear 54 is engaged with the transition gear 48, the transmission gear 50 is not engaged with the transition plate 47, and the extension spring 68 is in an extended state.

When the operation is started, the driving motor 23 is started to rotate forwards, so that the driving shaft 24 drives the screw shaft 30 to rotate through the pass-band transmission, so that the screw shaft 30 drives the connecting shaft 42 to rotate through the band transmission, so that the lifting plate 43 is driven to move upwards through the rotation of the connecting shaft 42, the transition plate 47 is not meshed with the transmission gear 50, meanwhile, the connecting shaft 42 drives the transition shaft 44 to rotate through the bevel gear pair transmission, so that the displacement gear 54 is driven to rotate through the transition gear 48, so that the displacement baffle 55 is driven to move leftwards through the rotation of the displacement shaft 53 to open the hook 60, after the opening, the transition plate 47 is meshed with the transmission gear 50, so that the transition plate 47 drives the transmission gear 50 to rotate through the upward movement of the connecting plate 46, so that the transmission baffle 51 is driven to rotate through the transmission shaft 49, so that the open slot 45 is opened, and at the same time, the screw block 31, thereby the hinge plate 36 drives the slide block 34 to slide in the track groove 33 through the rotating shaft 35, when the transmission baffle 51 is opened, the slide block 34 slides to the inclined position of the track groove 33, thereby the hinge plate 36 drives the slide block 34 to move at the inclined position of the track groove 33 through the downward movement of the screw block 31, at this time, the rotating gear 37 is engaged with the rack plate 38, thereby the rotating shaft 35 is driven to rotate through the engagement of the rotating gear 37 with the rack plate 38, thereby the rotating shaft 35 drives the output shaft 39 to rotate through belt transmission, thereby the output mounting plate 40 is driven to rotate for a certain angle through the rotation of the output shaft 39, thereby the rope on the output mounting plate 40 slides to the hook 60, at the same time, the driven block 57 is driven to move upwards through the rotation of the driving shaft 24, thereby the main push rod 58 is driven to move upwards, thereby the hydraulic oil level of the hydraulic oil pipe, so that the rope enters between the limiting blocks 66, after the completion, the driving motor 23 is started to rotate reversely, the device is reset, the rope between the limiting blocks 66 is fixed on an object for hoisting, when the hoisting steel wire rope is broken, the machine body 11 suddenly falls down under the hoisting weight of the hoisting hook 60, at the moment, the lifting box 16 relatively moves upwards through the abutting spring 76, so that the connecting gear 28 is matched with the fixed plate 29 through the upward movement of the lifting box 16 to drive the connecting gear 28 to rotate, so that the clamping block 72 is matched with the notch 69 to drive the connecting shaft 25 to rotate under the action of the buffer spring 73, so that the connecting shaft 25 drives the lifting sleeve 18 to rotate through the bevel gear pair transmission, so that the lifting shaft 17 drives the moving shaft 19 to rotate through the bevel gear pair transmission, so that the moving block 20 is driven to move relatively through the rotation of the moving shaft 19, so that the main locking block 21 and the auxiliary locking block 22 are used for relatively clamping and locking the upper part at the, at this time, the driven gear 26 and the face gear 27 are re-engaged by the abutting spring 76, and after the safety landing, the weight is removed and the main lock block 21 and the sub lock block 22 are reset by starting the driving motor 23.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a gantry crane is with wire rope fracture stable protection's hook assembly, includes the organism, its characterized in that: a working cavity is arranged in the machine body, a connecting cavity is arranged above the working cavity in the machine body, a telescopic expansion plate capable of expanding and contracting is fixedly arranged on the inner wall of the bottom side of the connecting cavity, the upper end of the expansion plate is fixedly arranged on a portal crane girder, the upper part of the expansion plate is in sliding fit with the wall body of the machine body, a steel wire rope fracture protection component for preventing the steel wire rope from falling off after the steel wire rope is fractured is arranged in the working cavity and the connecting cavity, the steel wire rope fracture protection component comprises a support plate fixedly arranged on the inner wall of the left side and the right side of the working cavity, a fixed plate fixedly arranged on the upper end of the support plate is arranged on the inner wall of the top side of the working cavity, lifting shafts extending up and down are symmetrically arranged between the connecting cavity and the wall body of the working cavity, lifting, the lifting box is rotatably installed with the lifting sleeve, the inner walls of the left side and the right side of the connecting cavity are symmetrically rotatably installed with a moving shaft extending left and right, the moving shaft is in transmission connection with the lifting shaft through a bevel gear pair, the moving shaft is in threaded connection with a moving block in left-right sliding connection with the inner wall of the bottom side of the connecting cavity, the left end of the moving block at the right side is fixedly installed with a main locking block with a convex block, the right end of the moving block at the left side is fixedly installed with a secondary locking block which can be matched with the main locking block and has a convex block, the main locking block and the secondary locking block can lock the upper part of the tail end of a telescopic plate, so that the machine body can not descend any more by the non-telescopic plate without any more telescopic action, a connecting shaft extending left and right is rotatably installed between the wall bodies at the opposite side of the lifting box, be provided with in the connecting gear can with the recess of breach intercommunication, organism bottom fixed mounting has the lifting hook, be provided with in the work cavity and be used for installing engineering bow tie rope hoist and mount rope installation component on the lifting hook, still be provided with in the work cavity and be used for the installation back to flexible firm rope that prevents to rock stabilize hoist and mount component.

2. The lifting hook device for the fracture stability protection of the steel wire rope for the gantry crane according to claim 1, is characterized in that: wire rope fracture protection subassembly still include with backup pad upper end fixed connection's butt spring, butt spring terminal with lift case fixed mounting, slidable mounting in the recess can with breach complex fixture block, the fixture block end be provided with recess inner wall fixed mounting's buffer spring, fixedly connected with driven gear on the connecting axle, working chamber top side inner wall fixed mounting's driving motor, driving motor end is provided with the drive shaft that extends from top to bottom, in the drive shaft fixedly connected with can with the face gear that driven gear meshing is connected.

3. The lifting hook device for the fracture stability protection of the steel wire rope for the gantry crane according to claim 2, is characterized in that: hoist and mount rope installation component include with the screw shaft that the installation just extended from top to bottom is rotated to working chamber bottom side inner wall, the screw shaft with the drive shaft passes through the belt drive and connects, the backup pad lower extreme is provided with telescopic link that can stretch out and draw back, telescopic link lower extreme fixed mounting have with screw shaft threaded connection's screw thread piece, the axis of rotation that extends around the screw thread piece internal rotation is installed, fixedly connected with rolling gear in the axis of rotation, working chamber bottom side inner wall fixed mounting has the track board, be provided with the track groove in the track board, sliding mounting has the slider in the track groove, articulated in the axis of rotation have with slider articulated slab, track groove rear end fixed mounting can with the rack board that the rolling gear meshing is connected.

4. The hoisting hook device for the fracture stability protection of the steel wire rope for the gantry crane according to claim 3, wherein: the hoisting rope mounting assembly further comprises an output shaft which is rotatably mounted at the rear end of the thread block and extends forwards and backwards, the output shaft is connected with the rotating shaft through belt transmission, an output mounting plate is fixedly connected to the output shaft, an engineering bowknot rope for hoisting is mounted on the output mounting plate, a linking shaft which extends upwards and downwards is rotatably mounted in the supporting plate, the linking shaft is connected with the screw shaft through belt transmission, a lifting plate which is slidably mounted on the inner wall of the left side of the working cavity is connected to the linking shaft through threads, an open slot is formed in the bottom of the machine body, a transition shaft which extends leftwards and rightwards is rotatably mounted on the inner wall of the left side of the working cavity, the transition shaft is connected with the linking shaft through bevel gear pair transmission, a linking plate is fixedly mounted at the right end of the lifting plate, a transmission shaft is rotatably mounted on the inner wall of, the fishplate bar right-hand member be provided with can with the cab apron of crossing that drive gear meshing is connected, fixedly connected with transition gear on the transition shaft, fixedly connected with can plug up on the transmission shaft the transmission baffle of open slot, be provided with the transmission groove in the transmission baffle, the displacement axle of extending about transmission inslot internal rotation is installed, on the displacement axle fixedly connected with can with the displacement gear that the transition gear meshing is connected, on the displacement axle threaded connection have with transmission groove sliding connection's displacement baffle, the displacement baffle can plug up the lifting hook.

5. The lifting hook device for the fracture stability protection of the steel wire rope for the gantry crane according to claim 4, is characterized in that: the rope stabilizing and hoisting assembly comprises a driven block which is in threaded connection with the driving shaft and is in sliding fit with the inner wall of the rear side of the working cavity, a main push rod filled with hydraulic oil is arranged in the lifting hook, a main push rod in sliding fit with the upper part of the hydraulic oil pipe is arranged at the lower end of the driven block, the bottom of the lifting hook is symmetrically provided with sliding chutes in the left and right directions, the sliding chutes are internally provided with displacement blocks in a sliding way, the tail ends of the displacement blocks are provided with driven push rods in sliding fit with the hydraulic oil pipes, an extension spring fixedly arranged with the displacement block is arranged on the inner wall of the sliding groove, a displacement groove is arranged in the displacement block, a displacement plate is arranged in the displacement groove in a sliding way, a return spring fixedly arranged with the inner wall of the displacement groove is arranged at the tail end of the displacement plate, and a limiting block for limiting the rope is fixedly arranged on one side opposite to the displacement plate through a connecting rod, and the lower end of the main beam of the gantry crane is fixedly arranged with the machine body through a wound steel wire rope.