CN217972295U

CN217972295U - Top-impact-prevention electric hoist

Info

Publication number: CN217972295U
Application number: CN202222334570.7U
Authority: CN
Inventors: 韩钊蓬; 秦江朝; 李立强; 焦勇涛
Original assignee: HENAN JUREN CRANE GROUP CO Ltd
Current assignee: HENAN JUREN CRANE GROUP CO Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-12-06
Anticipated expiration: 2032-09-02

Abstract

The utility model relates to a scour protection top electric block, including the electric block body, the movable pulley, the lifting hook, the movable pulley top is equipped with elastic buffer mechanism, the bottom of electric block body is fixed with the buffer board, the below of going up the buffer board is equipped with down the buffer board, both sides all are equipped with and are used for carrying out spacing stop gear to wire rope around the lower buffer board, go up the one end of buffer board bottom and install laser receiver, the one end at lower buffer board top is installed and is connected with laser receiver matched with laser range sensor, laser range sensor passes through the wire and is connected with the PLC controller at electric block body, the centre of going up the buffer board bottom is equipped with scour protection top buffer mechanism with the centre at lower buffer board top, install guiding mechanism between the both ends of going up the buffer board bottom and the both ends at lower buffer board top. Can carry out fine protection to electric block body and lifting hook, buffering effect is good, and stability is good, reduces the wobbling probability of buffering in-process wire rope emergence, promotes the security performance.

Description

Top-impact-prevention electric hoist

Technical Field

The utility model belongs to the technical field of hoisting equipment, especially, relate to a scour protection top electric block.

Background

The electric hoist is a special hoisting device, is arranged on a crown block and a gantry crane, and is widely applied to places such as industrial and mining enterprises, storage, wharfs and the like due to the characteristics of small volume, light dead weight, simple operation, convenient use and the like. At present, a travel switch is generally adopted to limit the maximum height of a lifting hook on an electric hoist. When the steel wire rope drives the lifting hook to move to be in contact with the travel switch, the travel switch is powered off, and the winding drum stops winding the steel wire rope. But because the inertia effect lifting hook still can continue to rise, can collide between lifting hook and the electric block, shortened the life of lifting hook and electric block, produced the incident. In order to avoid the occurrence of a top impact accident, in the prior art, a top impact prevention mechanism with a buffering function is often arranged below the electric hoist, as described in patent documents CN209259511U and CN 211920742U: patent document CN209259511U is through setting up trigger plate and limiting plate to set up the spring between the two, when the lifting hook ascended to the limiting plate position, limiting plate atress extrusion spring, the limiting plate was promoted in the spring atress, promoted trigger switch behind the limiting plate atress, thereby started to force fixed establishment to restrict the output of wire rope. Patent document CN211920742U is through setting up first support horizontal pole and second support horizontal pole to set up polyurethane buffer post between the two, polyurethane buffer post cushions when electric block dashes the top, and can trigger limit switch. Play cushioning effect in two above-mentioned patent documents be spring and polyurethane cushion post respectively, although can play certain cushioning effect, can reduce electric block's damage to a certain extent, but when appearing towards the top phenomenon, the lifting hook directly strikes at the limiting plate, the second supports on the horizontal pole, although can play certain cushioning effect to electric block, but the lifting hook still produces the damage because of the collision easily, and only rely on spring and polyurethane cushion post to cushion, lack the limiting plate, the second supports the guide mechanism that the horizontal pole carries out the direction, when receiving the striking, the limiting plate, the second supports the horizontal pole and can constantly sway and rock, the limiting plate, the second supports the horizontal pole and can touch wire rope at wobbling in-process, cause the wire rope swing, thereby arouse the lifting hook rotation, the swing, cause the goods to drop easily, there is very big potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a top-rushing prevention electric block for the top-rushing prevention mechanism of the electric block who solves among the prior art can not carry out effectual protection to the lifting hook, causes the wire rope swing easily among the buffer process, the poor technical problem of security.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a top-rushing prevention electric block, including the electric block body, the below of electric block body is provided with the movable pulley, the bottom of movable pulley is fixed with the lifting hook, the winding has wire rope on the reel of electric block body, wire rope's one end is fixed in on the shell of electric block body, wire rope's the other end is walked around the movable pulley after and is fixed on the reel of electric block body, the top of movable pulley is provided with elastic buffer mechanism, the bottom of electric block body is fixed with the last buffer board that the level set up, the below level of going up the buffer board is provided with down the buffer board, both sides all are provided with and are used for carrying out spacing stop gear to wire rope around the movable pulley, laser receiver is installed to the one end of going up the buffer board bottom, laser rangefinder sensor with laser receiver matched with is installed to the one end at lower buffer board top, laser rangefinder sensor passes through the wire and is connected with the PLC controller in the control circuit of electric block body, the centre at last buffer board bottom and the centre at lower buffer board top buffer mechanism are provided with top buffer mechanism, install the guiding mechanism that the symmetry set up between the both ends at the both ends of buffer board bottom and the both ends at lower buffer board top, laser receiver, laser rangefinder sensor all is located the outside of guiding mechanism.

Preferably, top-rushing prevention buffer gear is including fixing the engaging lug board at buffer board top intermediate position down, it has the hinge bar that sets up around two to articulate through the articulated shaft that runs through the engaging lug board on the engaging lug board, the top of two hinge bars all articulates there is the movable block, the guide way that the opening set up down is seted up along its length direction to the intermediate position of going up the buffer board bottom, the inside guide bar that is fixed with the level setting of guide way, the equal sliding connection of two movable blocks is outside at the guide bar, fixedly connected with extension spring between the inboard of two movable blocks, all be fixed with compression spring between two inner walls of the outside of two movable blocks and guide way, extension spring and compression spring all establish at the guide bar outside.

Preferably, guiding mechanism is including fixing the outer sleeve in last buffer board bottom, the bottom of outer sleeve is uncovered, inside cavity sets up, the top of buffer board is fixed with the vertical movable rod that upwards sets up down, the central axis of movable rod and the central axis of outer sleeve coincide each other, the top of movable rod extends to inside the outer sleeve, the both sides swivelling joint on movable rod upper portion has the leading wheel that the symmetry set up, the inner wall roll connection of leading wheel and outer sleeve, the inside top level of outer sleeve is provided with elastic buffer board, be fixed with the first buffer spring that a plurality of even intervals set up between the inner wall at elastic buffer board's top and outer sleeve top, be fixed with along its circumference on the inner wall of outer sleeve lower part and be used for carrying out spacing collar to the leading wheel, the inner wall of spacing collar sets up with the outer wall interval of movable rod.

Preferably, elastic buffer mechanism is including fixing the lower assembly plate at the movable pulley top, the top level of lower assembly plate is provided with the assembly plate, be fixed with the flexible loop bar that a plurality of even intervals set up between assembly plate and the lower assembly plate, the outside of each flexible loop bar all is equipped with second buffer spring, the top of second buffer spring and the bottom fixed connection of last assembly plate, the bottom of second buffer spring and the top fixed connection of lower assembly plate, flexible loop bar is including fixing the outer loop bar in last assembly plate bottom, the inside sliding connection of outer loop bar has the inner loop bar, the bottom mounting of inner loop bar is at the top of lower assembly plate.

Preferably, stop gear is including fixing the mount pad that the interval set up about two of buffer board one side down, rotates between two mount pads to be connected with two around the interval set up and be used for carrying out spacing direction's guide roll to wire rope, wire rope pass the clearance between two guide rolls and laminate mutually with the outer wall of two guide rolls.

The utility model has the advantages that: through setting up the buffer board, lower buffer board, elastic buffer mechanism, scour protection top buffer mechanism and guiding mechanism, when the movable pulley upward movement to contact with lower buffer board, elastic buffer mechanism can carry out fine buffering to the impact force that the movable pulley received, reduce the degree that the movable pulley received the harm, scour protection top buffer mechanism cushions the impact force that last buffer board received, reduce the impact force that the buffer board received, can play fine guard action to the electric block body, and through setting up guiding mechanism, the in-process of buffer board upward movement pipe under the lifting hook drives, can carry out spacing direction to lower buffer board, the buffer board can constantly sway when receiving the striking under preventing, stability is good, reduce the wobbling probability of wire rope emergence among the buffer process, promote the security performance.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the connection of the elastic buffer mechanism and the movable pulley;

FIG. 3 is a schematic view of the connection structure of the anti-bumping buffering mechanism with the upper buffering plate and the lower buffering plate;

FIG. 4 is a schematic view of the interior of the guide mechanism;

fig. 5 is a schematic structural view of the connection of the limiting mechanism and the lower buffer plate.

Reference numerals are as follows: 1-electric block body, 2-movable pulley, 3-lifting hook, 4-wire rope, 5-lower assembly plate, 6-upper assembly plate, 7-telescopic loop bar, 8-second buffer spring, 9-outer loop bar, 10-inner loop bar, 11-upper buffer plate, 12-lower buffer plate, 13-mounting seat, 14-guide roll, 15-laser receiver, 16-laser ranging sensor, 17-connecting lug plate, 18-articulated shaft, 19-articulated shaft, 20-movable block, 21-guide groove, 22-guide rod, 23-extension spring, 24-compression spring, 25-outer sleeve, 26-movable rod, 27-guide wheel, 28-elastic buffer plate, 29-first buffer spring, 30-spacing ring.

Detailed Description

The direction in which the laser receiver 15 is located in fig. 1 is the left.

As shown in fig. 1, the utility model discloses an electric block body 1, the below of electric block body 1 is provided with movable pulley 2, and the bottom of movable pulley 2 is fixed with lifting hook 3, and the winding has wire rope 4 on electric block body 1's the reel, and on wire rope 4's one end was fixed in electric block body 1's shell, wire rope 4's the other end was walked around movable pulley 2 after-fixing on electric block body 1's reel. The top of movable pulley 2 is provided with elastic buffer mechanism, as shown in fig. 2, elastic buffer mechanism is including fixing lower assembly plate 5 at movable pulley 2 top, the top level of lower assembly plate 5 is provided with assembly plate 6, be fixed with the flexible loop bar 7 that a plurality of even intervals set up between assembly plate 6 and the lower assembly plate 5, the outside of each flexible loop bar 7 all is equipped with second buffer spring 8, the top of second buffer spring 8 and the bottom fixed connection of last assembly plate 6, the bottom of second buffer spring 8 and the top fixed connection of lower assembly plate 5, flexible loop bar 7 is including fixing the outer loop bar 9 in last assembly plate 6 bottom, the inside sliding connection of outer loop bar 9 has inner loop bar 10, the bottom mounting of inner loop bar 10 is at the top of lower assembly plate 5. The bottom of electric block body 1 is fixed with the last buffer board 11 that the level set up, and the below level of going up buffer board 11 is provided with buffer board 12 down, goes up the centre of buffer board 11 bottom and is provided with crashproof top buffer gear with the centre at lower buffer board 12 top, goes up and installs the guiding mechanism that the symmetry set up between the both ends at 11 bottoms of buffer board and the both ends at lower buffer board 12 top. The front side and the rear side of the lower buffer plate 12 are provided with limiting mechanisms for limiting the steel wire rope 4. As shown in fig. 5, the limiting mechanism includes two mounting seats 13 fixed on one side of the lower buffer plate 12 and arranged at left and right intervals, two guide rollers 14 arranged at front and rear intervals and used for limiting and guiding the steel wire rope 4 are rotatably connected between the two mounting seats 13, and the steel wire rope 4 passes through a gap between the two guide rollers 14 and is attached to outer walls of the two guide rollers 14. Through setting up stop gear, can play certain direction limiting displacement to wire rope 4, prevent that wire rope 4 from appearing drawing to one side, guarantee that elastic buffer mechanism only can strike on buffer board 12 down. Go up the one end of buffer board 11 bottom and install laser receiver 15, the one end at lower buffer board 12 top is installed and is connected with laser receiver 15 matched with laser rangefinder sensor 16, and laser rangefinder sensor 16 passes through the wire and is connected with the PLC controller in the control circuit of electric block body 1. The laser receiver 15 and the laser distance measuring sensor 16 are both positioned outside the guide mechanism. The laser ranging sensor 16 irradiates laser onto the laser receiver 15, receives light reflected by the laser receiver 15, and monitors the distance between the upper buffer plate 11 and the lower buffer plate 12 in real time. The laser ranging sensor 16, the laser receiver 15 and the PLC controller are all the prior art, and the detailed structure is not described herein.

As shown in fig. 1 and fig. 3, scour protection top buffer gear is including fixing the connection otic placode 17 at 12 top intermediate positions down of buffer board, it has articulated hinge bar 19 that sets up around two through the articulated shaft 18 that runs through connection otic placode 17 on the connection otic placode 17, the top of two hinge bar 19 all articulates there is movable block 20, go up the intermediate position of buffer board 11 bottom and offer the guide way 21 that the opening set up down along its length direction, the inside guide bar 22 that is fixed with the level setting of guide way 21, two equal sliding connection of movable block 20 are outside at guide bar 22, fixedly connected with extension spring 23 between the inboard of two movable blocks 20, all be fixed with compression spring 24 between the outside of two movable blocks 20 and two inner walls of guide way 21, extension spring 23 and the equal cover of compression spring 24 are established outside guide bar 22. When the lower damping plate 12 is not impacted, the coils of the tension spring 23 are closely spaced with each other, and the coils of the compression spring 24 have a certain gap therebetween. As shown in fig. 4, the guide mechanism includes an outer sleeve 25 fixed at the bottom of the upper buffer plate 11, the bottom end of the outer sleeve 25 is open, the inner portion is hollow, a movable rod 26 vertically and upwardly arranged is fixed at the top of the lower buffer plate 12, the central axis of the movable rod 26 coincides with the central axis of the outer sleeve 25, the top of the movable rod 26 extends into the outer sleeve 25, two sides of the upper portion of the movable rod 26 are rotatably connected with guide wheels 27 symmetrically arranged, the guide wheels 27 are in rolling connection with the inner wall of the outer sleeve 25, an elastic buffer plate 28 is horizontally arranged above the inner portion of the outer sleeve 25, a plurality of first buffer springs 29 uniformly arranged at intervals are fixed between the top of the elastic buffer plate 28 and the inner wall of the top of the outer sleeve 25, a limit ring 30 used for limiting the guide wheels 27 is fixed on the inner wall of the lower portion of the outer sleeve 25 along the circumferential direction thereof, and the inner wall of the limit ring 30 and the outer wall of the movable rod 26 are arranged at intervals. At the in-process of buffer board 12 upward movement down, guiding mechanism not only can play fine guide effect, makes the articulated mast 19 atress even, avoids leading to certain department to receive too big impact force because of the atress inequality, avoids causing the damage to articulated mast 19, can also prevent down buffer board 12 and take place to sway when receiving the striking and rock, and stability is good, reduces buffer in-process wire rope 4 and takes place wobbling probability, promotes the security performance.

The utility model discloses a theory of operation and working process: in the process of lifting a heavy object upwards, when the movable pulley 2 moves upwards to be in contact with the lower buffer plate 12, the second buffer spring 8 and the telescopic loop bar 7 buffer the impact force on the movable pulley 2, so that the hard contact of the movable pulley 2 during collision is greatly reduced, the lower buffer plate 12 moves upwards due to the impact of the elastic buffer mechanism, the laser ranging sensor 16 irradiates laser onto the laser receiver 15 and receives the light reflected by the laser receiver 15, the distance between the upper buffer plate 11 and the lower buffer plate 12 is monitored in real time, when the distance between the upper buffer plate and the lower buffer plate reaches a set calibration cone, the laser ranging sensor 16 feeds a signal back to the PLC controller, the PLC controller controls the winding drum of the electric hoist body 1 to stop running, the winding drum is braked, at the moment, the lower buffer plate 12 continues to move upwards under the action of inertia, the two hinged rods 19 are extruded, so that the two movable blocks 20 move backwards along the guide rods 22, the distance between the two movable blocks 20 is longer and longer, the extension spring 23 is elongated to deform, and a part of impact force is absorbed and offset, meanwhile, the two movable blocks 20 respectively extrude the two compression springs 24, so that the compression springs 24 deform, and a part of impact force is absorbed and offset again, so that the impact force on the upper buffer plate 11 and the electric hoist body 1 is greatly reduced, meanwhile, in the process of upward movement of the lower buffer plate 12, the movable rods 26 slide upwards along the outer sleeves 25, so that a good guiding effect can be achieved, the hinged rods 19 are stressed uniformly, the lower buffer plate 12 can be prevented from swinging and shaking when being impacted, the stability is good, when the movable rods 26 move upwards to be in contact with the elastic buffer plate 28, the elastic buffer plate 28 and the first buffer spring 29 buffer the impact force received by the movable lever 26.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. The utility model provides an anti-scour-ejection electric block, includes the electric block body, and the below of electric block body is provided with the movable pulley, and the bottom of movable pulley is fixed with the lifting hook, and the winding has wire rope on the reel of electric block body, and on wire rope's one end was fixed in the shell of electric block body, wire rope's the other end was walked around the movable pulley after-fixing on the reel of electric block body, its characterized in that: the top of movable pulley is provided with elastic buffer mechanism, the last buffer board that the bottom of electric block body was fixed with the level and sets up, the below level of going up the buffer board is provided with down the buffer board, both sides all are provided with and are used for carrying on spacing stop gear to wire rope around the buffer board down, laser receiver is installed to the one end of going up the buffer board bottom, the one end at lower buffer board top is installed and is connected with laser receiver matched with laser range finding sensor, laser range finding sensor passes through the wire and is connected with the PLC controller in the control circuit of electric block body, the centre of going up the buffer board bottom is provided with crashproof top buffer mechanism with the centre at lower buffer board top, go up and install the guiding mechanism that the symmetry set up between the both ends at buffer board bottom and the both ends at lower buffer board top, laser receiver, laser range finding sensor all is located guiding mechanism's the outside.

2. An anti-ejection electric hoist according to claim 1, characterized in that: the top buffer gear of scour protection includes the connection otic placode of fixing buffer board top intermediate position under, it has the hinge bar that sets up around two to articulate through the articulated shaft that runs through the connection otic placode on the connection otic placode, the top of two hinge bars all articulates there is the movable block, the guide way that the opening set up down is seted up along its length direction to the intermediate position of going up the buffer board bottom, the inside guide bar that is fixed with the level setting of guide way, the equal sliding connection of two movable blocks is outside at the guide bar, fixedly connected with extension spring between the inboard of two movable blocks, all be fixed with compression spring between two inner walls of the outside of two movable blocks and guide way, extension spring and compression spring all establish at the guide bar outside.

3. An anti-ejection electric hoist according to claim 2, characterized in that: guiding mechanism is including fixing the outer sleeve in last buffer board bottom, the bottom of outer sleeve is uncovered, inside cavity sets up, the top of buffer board is fixed with the vertical movable rod that upwards sets up down, the central axis of movable rod and the central axis coincidence of outer sleeve each other, the top of movable rod extends to inside the outer sleeve, the both sides rotation on movable rod upper portion is connected with the leading wheel that the symmetry set up, the inner wall roll connection of leading wheel and outer sleeve, the inside top level of outer sleeve is provided with elastic buffer board, be fixed with the first buffer spring that a plurality of even intervals set up between the inner wall at elastic buffer board's top and outer sleeve top, be fixed with along its circumference on the inner wall of outer sleeve lower part and be used for carrying out spacing ring to the leading wheel, the inner wall of spacing ring sets up with the outer wall interval of movable rod.

4. An anti-ejection electric hoist according to claim 3, characterized in that: elastic buffer mechanism is including fixing the lower assembly plate at the movable pulley top, the top level of lower assembly plate is provided with the assembly plate, be fixed with the flexible loop bar that a plurality of even intervals set up between assembly plate and the lower assembly plate, the outside of each flexible loop bar all is overlapped and is equipped with second buffer spring, second buffer spring's top and the bottom fixed connection of last assembly plate, second buffer spring's bottom and the top fixed connection of lower assembly plate, flexible loop bar is including fixing the outer loop bar in last assembly plate bottom, the inside sliding connection of outer loop bar has interior loop bar, the bottom mounting of interior loop bar is at the top of lower assembly plate.

5. An anti-ejection electric hoist according to any one of claims 1-4, characterized in that: stop gear is including fixing the mount pad that the interval set up about two of buffer board one side down, rotates between two mount pads to be connected with two around the interval set up and be used for carrying out spacing direction's guide roll to wire rope, wire rope pass the clearance between two guide rolls and laminate mutually with the outer wall of two guide rolls.