CN212245944U - Stable motion system of lifting steel wire rope for field bridge - Google Patents

Abstract

The utility model discloses a stable motion system of a lifting steel wire rope for a field bridge, which comprises a trolley frame and a lifting appliance upper frame; four ends of the upper surface of the lifting appliance upper frame are respectively provided with a connecting support, and each connecting support comprises a movable support and a T-shaped frame; each movable support is provided with an anti-swing mechanism for controlling the swing amplitude of the T-shaped frame; each steel wire rope connecting head is connected with a steel wire rope; when the T-shaped frames are horizontal, two steel wire rope connectors on each T-shaped frame and two steel wire ropes between the corresponding lifting pulleys form two isosceles trapezoid waists; the four isosceles trapezoids of the four T-shaped frames where the steel wire ropes are located are kept identical when the T-shaped frames are in a horizontal state. The utility model discloses form four elementary isosceles trapezoid that wait about in the front on four faces, when cart or dolly walking play the braking, four elementary isosceles trapezoid that wait are like four robotic arm, and the range that hoist, hoist put on the shelf and container rocked when can reducing the container operation.

Description

Stable motion system of lifting steel wire rope for field bridge

Technical Field

The utility model belongs to the technical field of the hoist, concretely relates to field bridge is with playing to rise wire rope steady motion system.

Background

The field bridge is a port machine, and refers to bridge type carrying equipment for a stacking area, and is used for carrying in the inner field; wherein, the bridge substantially comprises a rail type container crane and a tire type container crane.

A crane hoisting steel wire rope system is adopted when a container is hoisted or unloaded by a field bridge, the crane hoisting steel wire rope system generally comprises a hoisting steel wire rope reel and a lifting appliance upper frame, a steel wire rope is wound on the hoisting steel wire rope reel, and the end part of the steel wire rope is connected with the lifting appliance upper frame; when the lifting appliance is used, the upper lifting appliance frame and the lifting appliance are connected with the container, and the lifting steel wire rope reel rotates to wind or loosen the steel wire rope, so that the container is lifted or lowered.

However, when the existing crane lifting steel wire rope system is braked during walking of a cart or a trolley, due to the inertia effect, the lifting appliance carrying a container is easy to swing, so that the stacking positioning is inaccurate, the time consumption of a driver in the process of the container is more, and the loading and unloading speed is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of above-mentioned prior art, provide a field bridge is with playing to rise wire rope steady motion system.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a lifting steel wire rope stable motion system for a field bridge comprises a trolley frame and a lifting appliance upper frame positioned below the trolley frame;

four ends of the upper surface of the upper hanger frame are respectively provided with a connecting support, each connecting support comprises a movable support connected with the upper hanger frame, the upper part of each movable support is provided with a T-shaped frame, and two ends of the upper part of each T-shaped frame are symmetrically provided with steel wire rope connectors; the top of the movable support is hinged with the bottom of the T-shaped frame; each movable support is provided with an anti-swing mechanism for controlling the swing amplitude of the T-shaped frame;

the two steel wire rope connectors on the T-shaped frames at the left end and the right end of the upper hanger frame are distributed along the front-back direction, and the two steel wire rope connectors on the T-shaped frames at the front end and the back end of the upper hanger frame are distributed along the left-right direction;

each steel wire rope connecting head is connected with a steel wire rope, and the other end of each steel wire rope upwards crosses the corresponding lifting pulley and then is wound on the lifting winding drum; the lifting pulley and the lifting winding drum are arranged on the trolley frame;

when the T-shaped frames are horizontal, two steel wire rope connectors on each T-shaped frame and two steel wire ropes between the corresponding lifting pulleys form two isosceles trapezoid waists; two isosceles trapezoids in which the steel wire ropes on the two opposite T-shaped frames are positioned are symmetrically arranged, and the included angle between the isosceles trapezoid in which the steel wire ropes on the left and right T-shaped frames are positioned and the plumb surface extending in the front-back direction is equal to the included angle between the isosceles trapezoid in which the steel wire ropes on the front and back T-shaped frames are positioned and the plumb surface extending in the left-right direction; the four isosceles trapezoids of the four T-shaped frames where the steel wire ropes are located are kept identical when the T-shaped frames are in a horizontal state.

Preferably, the central axis of the lifting drum extends in the fore-and-aft direction;

the central axis of a lifting pulley connected with the steel wire ropes on the T-shaped frames at the left and right ends of the upper frame of the lifting appliance extends along the left and right directions;

the central axis of a lifting pulley connected with the steel wire ropes on the T-shaped frames at the front and rear ends of the upper frame of the lifting appliance extends along the front and rear directions;

the steel wire ropes connected to the T-shaped frames at the left and right ends of the upper hanger frame sequentially cross over respective lifting pulleys and respective guide pulleys upwards and then are wound on a lifting winding drum;

the guide pulley is arranged on the trolley frame.

Preferably, the winding directions of the steel wire rope connected with the left steel wire rope connector on the T-shaped frame at the front end and the rear end of the upper hanger frame and the steel wire rope connected with the two steel wire rope connectors on the T-shaped frame at the left end of the upper hanger frame on the lifting winding drum are consistent;

and the winding directions of the steel wire ropes connected with the steel wire rope connectors on the right side of the T-shaped frames at the front end and the rear end of the upper hanger frame and the steel wire ropes connected with the two steel wire rope connectors on the T-shaped frame at the right end of the upper hanger frame on the lifting reel are consistent.

Preferably, the anti-swing mechanism comprises a controller, two jacking oil cylinders and two tension sensors;

bases are symmetrically arranged at two ends of the side wall of the movable support, and the bottom ends of the two jacking oil cylinders are respectively fixedly arranged on the bases at two sides; piston rods of the two jacking oil cylinders respectively correspond to the two ends of the T-shaped frame up and down;

the two tension sensors are respectively arranged on two steel wire rope connecting heads of the T-shaped frame, and the other ends of the tension sensors are connected with corresponding steel wire ropes;

the two tension sensors are in communication connection with the controller;

the controller receives the tension values measured by the two tension sensors and calculates the difference value of the two tension values;

when the tension values measured by the two tension sensors in the same anti-swing mechanism are both larger than a first set value and the absolute value of the difference value of the two tension values is larger than a second set value, the piston rod of the jacking oil cylinder which is positioned on the same side with the tension sensor with the smaller measured tension value extends upwards and abuts against the bottom end of the corresponding side of the T-shaped frame.

Preferably, a rubber pad is arranged at the top end of the piston rod of the jacking oil cylinder.

Preferably, a cross beam is arranged at the position where the movable support is arranged on the upper hanger frame, and the bottoms of two ends of the cross beam are hinged with the upper hanger frame through hinge shafts;

the cross beams at the left and right ends of the upper hanger frame extend along the front-back direction; the bottom parts of the cross beams at the left end and the right end of the upper frame of the lifting appliance are provided with slide rails extending along the front-back direction;

the cross beams at the front end and the rear end of the upper frame of the lifting appliance extend along the left-right direction; the bottom parts of the cross beams at the front end and the rear end of the upper frame of the lifting appliance are provided with slide rails extending along the left-right direction;

the bottom of the movable support is provided with a sliding block matched with a sliding rail at the bottom of the corresponding cross beam;

a screw rod is arranged at one end of the cross beam, and a motor is arranged at the end part of the screw rod;

and a nut in threaded connection with the screw rod is arranged in the movable support.

Preferably, the number of the lifting winding drums is one, and the lifting winding drum is located in the middle of the trolley frame;

eight steel wire ropes connected with the four T-shaped frames on the upper frame of the lifting appliance are consistent in winding direction on the lifting winding drum.

Preferably, the two lifting winding drums are arranged in parallel left and right;

the steel wire rope connected with the steel wire rope connector on the left side of the T-shaped frame on the front end and the rear end of the upper hanger frame and the steel wire rope connected with the steel wire rope connectors on the two T-shaped frames on the left end of the upper hanger frame are wound on the lifting winding drum on the left side;

and the steel wire rope connected with the steel wire rope connector on the right side of the T-shaped frame on the front end and the rear end of the upper hanger frame and the steel wire rope connected with the two steel wire rope connectors on the T-shaped frame on the right end of the upper hanger frame are wound on the lifting winding drum on the right side.

The utility model has the advantages that:

(1) the utility model discloses when the T type frame level, the winding mode of wire rope among the lifting wire rope steady motion system for the field bridge forms four congruent isosceles trapezoids that have the steady motion function on four front and back left and right sides, trapezoidal waist is exactly the wire rope between the lifting pulley on connecting the trolley frame and the wire rope connector on the hoist frame, four isosceles trapezoids keep congruent in the rotation process of the lifting reel, the height of plumb bob direction that the waist length change arouses is also unanimous to guarantee the uniformity of four end heights of hoist frame, realize steady rising or decline; when the crane is braked by walking on a cart or a trolley, the four congruent isosceles trapezoids are like four mechanical arms, and the upper hanger frame is firmly locked through mutual geometric constraint, so that the swinging amplitude of the hanger, the upper hanger frame and the container during container operation can be reduced, the stacking or transferring period of each container is shortened, and the aim of improving the operation efficiency is finally achieved; when the lifting appliance is loaded on the frame, and the T-shaped frame swings, the swing angle range of the T-shaped frame is within the allowed swing range in the lifting process due to the arrangement of the anti-swing mechanism, so that when the T-shaped frame swings but is not in a horizontal state, the four trapezoids can be regarded as four approximate isosceles trapezoids in the engineering error range, the four trapezoids basically keep the same degree in the rotating process of the lifting winding drum, and the swing amplitude of the container can be reduced in the engineering error range.

(2) The utility model discloses field bridge is with the setting that removes support, crossbeam, lead screw among the play wire rope steady motion system, has realized that the hoist is put on the shelf at the fine motion translation of fore-and-aft direction, the fine motion translation and the fine motion gyration function of left right direction to play the effect of adjusting hoist overhead position, to the case fast when can guaranteeing to load and unload the container, improve the operating efficiency of loading and unloading container.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic plan view of a structure of a lifting steel wire rope stable motion system for a yard bridge in embodiment 1 of the present invention;

fig. 2 is a schematic front view of a structure of a lifting steel wire rope stable motion system for a yard bridge in embodiment 1 of the present invention;

fig. 3 is a schematic view of a winding principle of a wire rope in a lifting wire rope stable motion system for a yard bridge in embodiment 1 of the present invention;

fig. 4 is a schematic top view of a structure of a lifting wire rope stable motion system for a yard bridge in embodiment 2 of the present invention;

fig. 5 is a schematic front view of a structure of a lifting wire rope stable motion system for a yard bridge in embodiment 2 of the present invention;

fig. 6 is a schematic view of a winding principle of a wire rope in a lifting wire rope stable motion system for a yard bridge in embodiment 2 of the present invention;

FIG. 7 is a schematic structural view of the T-shaped frame of the present invention;

wherein,

1-trolley frame, 2-upper hanger frame, 3-movable support, 301-base, 4-T-shaped frame, 401-steel wire rope connector, 5-steel wire rope, 6-lifting pulley, 7-lifting reel, 8-guide pulley, 9-cross beam, 901-articulated shaft, 10-motor, 11-lifting oil cylinder, 12-tension sensor and 13-rubber pad.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present invention, the terms such as "front", "back", "left", "right", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and only for convenience of describing the relationship term determined by the structural relationship of each component or element of the present invention, which is not specific to any component or element of the present invention, which is not to be construed as a limitation of the present invention.

In the present invention, terms such as "connected" and "connected" should be understood in a broad sense, and may be either fixedly connected or integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.

The present invention will be further explained with reference to the drawings and examples.

Example 1:

as shown in fig. 1-3, a lifting steel wire rope stable motion system for a field bridge comprises a trolley frame 1 and a lifting appliance upper frame 2 positioned below the trolley frame 1;

four ends of the upper surface of the lifting appliance upper frame 2 are respectively provided with a connecting support, as shown in fig. 7, each connecting support comprises a movable support 3 connected with the lifting appliance upper frame 2, the upper part of each movable support 3 is provided with a T-shaped frame 4, and two ends of the upper part of each T-shaped frame 4 are symmetrically provided with steel wire rope connectors 401; the top of the movable support 3 is hinged with the bottom of the T-shaped frame 4; each movable support is provided with an anti-swing mechanism for controlling the swing amplitude of the T-shaped frame 4, the anti-swing mechanism restrains the swing amplitude of the T-shaped frame 4 when the lifting appliance upper frame 2 is loaded, so that the problem that the T-shaped frame 4 swings greatly when two steel wire ropes 5 connected with the T-shaped frame 4 are unbalanced in stress is solved, and the isosceles trapezoid is damaged once the T-shaped frame 4 swings greatly, so that the lifting appliance upper frame 2 swings when a cart or a trolley runs and brakes;

the two steel wire rope connectors 401 on the T-shaped frames at the left end and the right end of the lifting appliance upper frame 2 are distributed along the front-back direction, and the two steel wire rope connectors 401 on the T-shaped frames at the front end and the rear end of the lifting appliance upper frame 2 are distributed along the left-right direction;

each steel wire rope connector 401 is connected with a steel wire rope 5, and the other end of each steel wire rope 5 upwards crosses a respective lifting pulley 6 and then is wound on a lifting winding drum 7; the lifting pulley 6 and the lifting winding drum 7 are both arranged on the trolley frame 1;

when the T-shaped frames 4 are horizontal, two steel wire rope connectors 401 on each T-shaped frame 4 and two steel wire ropes 5 between the corresponding lifting pulleys 6 form two waists of an isosceles trapezoid, that is, when the T-shaped frames 4 are horizontal, the two steel wire rope connectors 401 on each T-shaped frame 4, the lifting pulleys 6 corresponding to the corresponding steel wire rope connectors 401, and the two steel wire ropes 5 between the steel wire rope connectors 401 and the corresponding lifting pulleys 6 form an isosceles trapezoid; two isosceles trapezoids where the steel wire ropes on the two opposite T-shaped frames 4 are located are symmetrically arranged, and the included angle between the isosceles trapezoids where the steel wire ropes on the left and right T-shaped frames 4 are located and the plumb surfaces extending in the front-back direction is equal to the included angle between the isosceles trapezoids where the steel wire ropes on the front and back T-shaped frames 4 are located and the plumb surfaces extending in the left-right direction; the four isosceles trapezoids of the four T-shaped frames 4 where the steel wire ropes are located are kept identical when the T-shaped frames are in a horizontal state. In such arrangement, when the waist length changes of the four isosceles trapezoids are consistent, the heights of the plumb bob directions caused by the waist length changes are also consistent, so that the heights of the four ends of the upper frame 2 of the lifting appliance are consistent, and stable rising or falling is realized.

In the specific installation process, the included angle between the isosceles trapezoid where the steel wire rope is located on the left and right two-end T-shaped frames 4 and the plumb surface extending in the front-back direction and the included angle between the isosceles trapezoid where the steel wire rope is located on the front and rear two-end T-shaped frames 4 and the plumb surface extending in the left-right direction are generally set to be 0, namely, the left and right isosceles trapezoids are located on the plumb surfaces extending in the two front-back directions, and the front and rear isosceles trapezoids are located on the plumb surfaces extending in the two left-right directions.

After the eight steel wire ropes 5 are wound in the way, when the T-shaped frame 4 is horizontal, four congruent isosceles trapezoids with stable motion function are formed on the front, back, left and right surfaces, the waist of each isosceles trapezoid is a steel wire rope between a lifting pulley 6 on the trolley frame 1 and a steel wire rope connector 401 on the upper frame 2 of the lifting appliance, the four isosceles trapezoids are kept congruent in the rotation process of the lifting winding drum 7, and the heights of plumb directions caused by waist length changes are consistent, so that the consistency of the heights of four ends of the upper frame 2 of the lifting appliance is ensured, and stable lifting or descending is realized; therefore, when the cart or the trolley runs and brakes, the four congruent isosceles trapezoids are like four mechanical arms, the upper hanger frame 2 is firmly locked through mutual geometric constraint, the swinging amplitude of the hanger, the upper hanger frame 2 and the container during container operation can be reduced, the stacking or transferring period of each container is shortened, and the purpose of improving the operation efficiency is finally achieved.

Under the load condition of the upper frame 2 of the lifting appliance, when the T-shaped frame 4 swings, due to the arrangement of the anti-swing mechanism, the swinging angle range of the T-shaped frame 4 is adjusted to the allowed swinging range through the tension sensor and the controller, when the T-shaped frame 4 swings but is not in a horizontal state, the four trapezoids can be regarded as four approximate isosceles trapezoids in the engineering error range, the four trapezoids basically keep the same in the rotating process of the lifting winding drum 7, and therefore the swinging amplitude of the container can be reduced in the engineering error range.

Preferably, the central axis of the lifting drum 7 extends in the fore-and-aft direction;

the central axis of a lifting pulley 6 connected with a steel wire rope 5 on the T-shaped frame at the left and right ends of the upper frame 2 of the lifting appliance extends along the left and right direction; the four lifting pulleys 6 with central axes extending along the left-right direction are distributed on the front side and the rear side of the left end and the right end of the trolley frame 1;

the central axis of a lifting pulley 6 connected with the steel wire ropes 5 on the T-shaped frames at the front and rear ends of the upper frame 2 of the lifting appliance extends along the front and rear direction; the lifting pulleys 6 with central axes extending along the front-back direction are four in total, are distributed on the left side and the right side of the trolley frame 1 and are positioned on the inner sides of the lifting pulleys 6 with central axes extending along the left-right direction;

the steel wire ropes 5 connected to the T-shaped frames at the left and right ends of the hanger upper frame 2 sequentially cross over respective lifting pulleys 6 and respective guide pulleys 8 upwards and then are wound on a lifting winding drum 7; the four guide pulleys 8 are arranged on the inner side of the lifting pulley 6, the central axis of which extends along the left-right direction;

the guide pulley 8 is arranged on the trolley frame 1, and the direction of the guide pulley 8 is arranged as long as the guide pulley can guide the steel wire rope 5, so that the steel wire rope can be wound on the lifting winding drum 7 conveniently.

In embodiment 1 of the present application, the arrangement of each hoisting pulley 6 and each guide pulley 8 is as shown in fig. 1-2, and the arrangement is to form four congruent isosceles trapezoids when the T-shaped frame 4 is horizontal, but the arrangement of each hoisting pulley 6 and each guide pulley 8 is not limited to the one shown in fig. 1-2, as long as four congruent isosceles trapezoids can be achieved by winding the wire rope.

Preferably, the winding directions of the steel wire rope 5 connected with the left steel wire rope connector 401 on the T-shaped frame at the front end and the rear end of the upper hanger frame 2 and the steel wire rope 5 connected with the two steel wire rope connectors 401 on the T-shaped frame at the left end of the upper hanger frame 2 on the lifting reel 7 are consistent;

the winding directions of the steel wire ropes 5 connected with the steel wire rope connectors 401 on the right side of the T-shaped frames at the front end and the rear end of the upper hanger frame 2 and the steel wire ropes 5 connected with the two steel wire rope connectors 401 on the T-shaped frame at the right end of the upper hanger frame 2 on the lifting reel 7 are consistent.

Preferably, the anti-swing mechanism comprises a controller, two jacking cylinders 11 and two tension sensors 12;

bases 301 are symmetrically arranged at two ends of the side wall of the movable support 3, and the bottom ends of the two jacking oil cylinders 11 are respectively fixedly arranged on the bases 301 at two sides; piston rods of the two jacking oil cylinders 11 respectively correspond to two ends of the T-shaped frame 4 up and down;

the two tension sensors 12 are respectively arranged on the two steel wire rope connectors 401 of the T-shaped frame 4, and the other ends of the tension sensors 12 are connected with the corresponding steel wire ropes 5 and used for detecting tension borne by the steel wire ropes 5;

the two tension sensors 12 are in communication connection with the controller;

the controller receives the tension values measured by the two tension sensors 12 and calculates the difference value of the two tension values;

when the tension values measured by the two tension sensors 12 in the same anti-swing mechanism are both greater than a first set value and the absolute value of the difference value of the two tension values is greater than a second set value, the piston rod of the jacking oil cylinder 11 which is located on the same side with the tension sensor 12 with the smaller measured tension value extends upwards to abut against the bottom end of the corresponding side of the T-shaped frame 4 and jacks the T-shaped frame 4 to a horizontal state. The controller is connected with the jacking oil cylinder and controls the action of a piston rod of the jacking oil cylinder 11 according to the received tension values measured by the two tension sensors 12.

As shown in fig. 7, the tension sensor 12 at the left end and the jacking cylinder 11 at the left end are located on the same side; the tension sensor 12 at the right end and the jacking oil cylinder 11 at the right end are positioned at the same side;

in particular, the first set point is related to the tension experienced by the wire ropes 5 when the spreader upper frame 2 is empty (i.e. no container is being hoisted), and may typically be set as: the average tension of the steel wire rope 5 when the lifting appliance is lifted up by the lifting appliance 2 in no load is 1.5 times;

the second set value is determined according to the actual situation of the site and the required anti-swing degree. When the difference between the tensile forces borne by two steel wire ropes 5 connected to the same T-shaped frame 4 is larger, the swinging angle of the T-shaped frame 4 is larger; in field operation, the angle range allowing the T-shaped frame 4 to swing clockwise or anticlockwise is-a degrees, then when the T-shaped frame 4 rotates to-a degrees or a degrees, the absolute value of the difference value of the tensile forces exerted on the two steel wire ropes 5 is m, so that when the T-shaped frame 4 is ensured to swing only in the range of-a degrees to a degrees, and when the absolute value of the difference value of the two tensile forces is detected to be larger than m, the controller controls the corresponding jacking oil cylinder 11 to act, and jacks up the corresponding side of the T-shaped frame 4 to a horizontal state. The angle range-a to-a ° is determined according to the field requirement, and the value of m can be determined according to the actual measurement on the field, specifically, according to the anti-swing requirement on the field, the angle range allowing the T-shaped frame 4 to swing clockwise or counterclockwise is usually set to-2 to 2 °, and the corresponding value of m is 3T, where 3T refers to the gravity value of 3 tons of heavy objects;

specifically, when the lifting appliance upper frame 2 is in no-load, the pulling forces exerted on the two steel wire ropes on the T-shaped frame 4 are not greater than a first set value, and at this time, the two jacking oil cylinders 11 do not act, that is, when the lifting appliance upper frame 2 is in no-load, the T-shaped frame 4 can swing freely to adapt to the condition of unbalanced stress of the steel wire ropes;

when 2 loads (hoist and mount container) on the hoist upper rack, the pulling force that two wire rope received on T type frame 4 this moment all is greater than first setting value, in case the swing of T type frame 4 exceeds the angle scope of allowwing this moment, the corresponding jacking cylinder 11 action of controller control, with T type frame 4 jacking to the horizontality, specifically as follows:

(1) when the absolute value of the difference value of the two tension values is smaller than a second set value, the two jacking oil cylinders 11 do not act, and the T-shaped frame 4 swings properly within an allowed angle range to adapt to the condition of unbalanced stress of the steel wire rope and prevent the steel wire rope from being damaged due to overlarge stress to influence the service life of the steel wire rope;

(2) when the absolute value of the difference value of the two tension values is larger than a second set value, and the tension value measured by the left tension sensor 12 is larger than the tension value measured by the right tension sensor 12, the T-shaped frame 4 swings clockwise beyond the allowed angle range, and the controller controls the piston rod of the right jacking oil cylinder 11 to extend out, so that the T-shaped frame is jacked in a horizontal state, and normal box landing operation is facilitated;

(3) when the absolute value of the difference value of the two tension values is greater than the second set value, and the tension value measured by the right tension sensor 12 is greater than the tension value measured by the left tension sensor 12, the T-shaped frame 4 swings counterclockwise beyond the allowed angle range, and the controller controls the piston rod of the left jacking oil cylinder 11 to extend out, so that the T-shaped frame is jacked in a horizontal state, and normal box-landing operation is facilitated.

Therefore, this application is through preventing the setting of pendulum mechanism, has realized that hoist put on the shelf 2 and has permitted T type frame 4 random swing when empty, makes T type frame 4 swing at the angle within range that allows through setting up of jacking cylinder 11 when hoist put on the shelf 2 load, has reduced the swing range of hoist and mount in-process on the one hand, realizes steady lift, and on the other hand allows to do suitable swing in order to adapt to the uneven condition of wire rope atress, prevents that the wire rope atress from too big causing the damage and influence its life-span.

Preferably, the top end of the piston rod of the jacking oil cylinder 11 is provided with a rubber pad 13, so that the bottom end face of the T-shaped frame 4 is protected.

Preferably, a cross beam 9 is arranged at the position where the movable support 3 is arranged on the upper hanger frame 2, and the bottoms of two ends of the cross beam 9 are hinged with the upper hanger frame 2 through a hinge shaft 901;

the cross beams 9 at the left end and the right end of the upper hanger frame 2 extend along the front-back direction; the bottoms of the cross beams 9 at the left end and the right end of the upper hanger frame 2 are provided with slide rails extending along the front-back direction;

the cross beams 9 at the front end and the rear end of the lifting appliance upper frame 2 extend along the left-right direction; the bottom parts of the cross beams 9 at the front end and the rear end of the upper hanger frame 2 are provided with slide rails extending along the left-right direction;

the bottom of the movable support 3 is provided with a sliding block matched with a sliding rail at the bottom of the corresponding cross beam 9;

a screw rod is arranged at one end of the cross beam 9, and a motor 10 is arranged at the end part of the screw rod;

and a nut in threaded connection with the screw rod is arranged in the movable support 3.

The motor 10 drives the screw rod to rotate, and under the sliding limit fit of the sliding block at the bottom of the movable support 3 and the sliding rail at the bottom of the cross beam 9 and the thread fit of the screw rod and the nut, when the screw rod rotates, the relative motion between the movable support 3 and the hanger upper frame 2 is realized.

Preferably, the lifting reels 7 are arranged in one, as shown in fig. 1 to 3, and the lifting reels 7 are positioned in the middle of the trolley frame 1;

eight steel wire ropes 5 connected with four T-shaped frames on the upper hanger frame 2 are consistent in winding direction on a lifting winding drum 7.

Such a winding manner can realize: when the lifting winding drum 7 rotates, the eight steel wire ropes 5 can be synchronously tightened or loosened.

At the moment, the directions of the four guide pulleys 8 are shown in fig. 1-2, wherein the central axes of the two guide pulleys 8 on the left side extend along the vertical direction, the two steel wire ropes 5 on the T-shaped frame at the left end are guided by the respective guide pulleys 8 on the left side and then are wound anticlockwise by the bottom of the lifting winding drum 7, and the steel wire ropes on the left sides of the front and rear T-shaped frames cross the respective lifting pulleys 6 and then are wound anticlockwise by the bottom of the lifting winding drum 7; the central axes of the two guide pulleys 8 at the right end have a certain included angle with the vertical direction, so that the two steel wire ropes 5 on the T-shaped frame at the right end are guided by the respective guide pulleys 8 at the right side and then are wound anticlockwise by the top of the lifting reel 7, and the steel wire ropes 5 at the right side of the T-shaped frame at the front end and the rear end cross the respective lifting pulleys 6 and then are wound anticlockwise by the top of the lifting reel 7. When the lifting drum 7 rotates anticlockwise, the lifting appliance upper frame 2 rises.

Meanwhile, the guide pulleys 8 on the left side and the right side can be exchanged, so that the two steel wire ropes 5 on the left end T-shaped frame and the steel wire ropes 5 on the left sides of the front end T-shaped frame and the rear end T-shaped frame are clockwise wound from the top of the lifting winding drum 7, and the two steel wire ropes 5 on the right end T-shaped frame and the steel wire ropes 5 on the right sides of the front end T-shaped frame and the rear end T-shaped frame are clockwise wound from the bottom of the lifting winding drum. When the lifting drum 7 rotates clockwise, the upper hanger frame 2 rises.

A lifting steel wire rope stable motion system for a field bridge has the following specific implementation mode:

(1) reduce the amplitude of the shaking of the lifting device upper frame 2 in the lifting process

When the lifting reel 7 is rotated, the eight steel wire ropes 5 can be synchronously tightened or loosened to realize the ascending or descending of the lifting appliance upper frame 2, and the tightening or loosening lengths of the eight steel wire ropes 5 are consistent, so that the four approximately isosceles trapezoids are basically kept identical in the rotating process of the lifting reel 7; therefore, when the cart or the trolley runs and brakes, the four basically congruent isosceles ladders are like four mechanical arms, the upper hanger frame 2 is firmly locked through mutual geometric constraint, the amplitude of shaking of the hanger, the upper hanger frame 2 and containers during container operation can be reduced to the maximum extent, the stacking or transferring period of each container is shortened, and finally the purpose of improving the operation efficiency is achieved.

(2) Micro-motion translation in front-back direction of upper frame 2 of lifting appliance

The motors 10 at the left end and the right end of the upper hanger frame 2 are started to enable the corresponding screw rods to rotate so as to apply acting force to the movable support 3, the position of the movable support 3 is unchanged under the action of the T-shaped frame 4 at the upper part of the movable support 3 and the connected steel wire rope, and the transverse beam 9 and the upper hanger frame 2 realize micro-motion translation in the front-back direction under the reaction force of the movable support 3 and the cooperation between the upper sliding block of the movable support 3 and the upper sliding rail of the transverse beam 9.

(3) Micro-motion translation in left and right directions of upper frame 2 of lifting appliance

The motors 10 at the front end and the rear end of the upper hanger frame 2 are started to enable the corresponding screw rods to rotate so as to apply acting force to the movable support 3, the position of the movable support 3 is unchanged under the action of the T-shaped frame 4 at the upper part of the movable support 3 and the connected steel wire rope, and the transverse beam 9 and the upper hanger frame 2 realize micro-motion translation in the left and right directions under the reaction force of the movable support 3 and the matching between the upper sliding block of the movable support 3 and the upper sliding rail of the transverse beam 9.

(4) 2 micro-motion rotation of upper frame of lifting appliance

The clockwise micro-motion rotation or the anticlockwise micro-motion rotation of the upper frame 2 of the lifting appliance is realized through the cooperative action of the four motors 10 and the four screw rods.

Wherein, the setting of removal support 3, crossbeam 9, lead screw in this application has realized the fine motion translation of hoist upper bracket 2 front and back direction, the fine motion translation and the fine motion gyration function of left and right sides direction to play the effect of adjusting 2 positions on the hoist upper bracket, to the case fast when can guaranteeing to load and unload the container, improve the operating efficiency of loading and unloading the container.

Example 2:

unlike in embodiment 1, the lifting reels 7 are provided in two and parallel left and right, as shown in fig. 4 to 6;

the steel wire ropes 5 connected with the left steel wire rope connectors 401 on the T-shaped frames at the front end and the rear end of the hanger upper frame 2 and the steel wire ropes 5 connected with the two steel wire rope connectors 401 on the T-shaped frame at the left end of the hanger upper frame 2 are wound on the lifting drum 7 at the left side;

and a steel wire rope 5 connected with the steel wire rope connectors 401 on the right side of the T-shaped frames at the front end and the rear end of the upper hanger frame 2 and a steel wire rope 5 connected with the two steel wire rope connectors 401 on the T-shaped frame at the right end of the upper hanger frame 2 are wound on the lifting reel 7 on the right side.

The remaining technical features are the same as in example 1.

In example 2, the winding directions of the two wire ropes 5 on the left side of the left-end T-shaped frame and the two wire ropes 5 on the left side of the front-end T-shaped frame and the rear-end T-shaped frame and the winding directions of the two wire ropes 5 on the right side of the front-end T-shaped frame and the rear-end T-shaped frame may be the same or different.

When the winding directions are the same, for example, four steel wire ropes 4 on one side rotate anticlockwise from the bottom of the lifting reel 7, four steel wire ropes 4 on the other side rotate anticlockwise from the top of the lifting reel 7, and at the moment, the two lifting reels 7 rotate in the same direction, so that the eight steel wire ropes can be synchronously tightened or loosened, and the lifting or descending of the lifting appliance upper frame 2 is realized.

When the winding directions are different, for example, as shown in fig. 6, the four steel wire ropes 4 on the left side rotate counterclockwise from the bottoms of the lifting drums 7, the four steel wire ropes 4 on the right side rotate clockwise from the bottoms of the lifting drums 7, and at this time, the two lifting drums 7 rotate in different directions, so that the eight steel wire ropes can be synchronously tightened or loosened, and the lifting or descending of the upper frame 2 of the lifting appliance is realized.

When the lifting appliance upper frame 2 is lifted, the two lifting drums 7 are controlled to rotate, so that eight steel wire ropes are synchronously tightened or loosened; meanwhile, the rotating linear rates of the two hoisting drums 7 are the same, so that the tightening or loosening lengths of the eight steel wire ropes 5 are consistent, and the four approximately isosceles trapezoids are kept basically identical in the rotating process of the hoisting drums 7; therefore, when the cart or the trolley runs and brakes, the four basically congruent isosceles trapezoids are like four mechanical arms, the upper hanger frame 2 is firmly locked through mutual geometric constraint, the swinging amplitude of the hanger, the upper hanger frame 2 and the container during container operation can be reduced, the stacking or transferring period of each container is shortened, and the purpose of improving the operation efficiency is finally achieved.

In embodiment 2, the operations of the fine motion translation in the front-rear direction of the upper hanger frame 2, the fine motion translation in the left-right direction of the upper hanger frame 2, and the fine motion rotation of the upper hanger frame 2 are the same as those in embodiment 1.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the present invention, and those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without inventive labor are still within the scope of the present invention.

Claims (8)

1. A lifting steel wire rope stable motion system for a field bridge comprises a trolley frame and a lifting appliance upper frame positioned below the trolley frame; it is characterized in that the utility model is characterized in that,

four ends of the upper surface of the upper hanger frame are respectively provided with a connecting support, each connecting support comprises a movable support connected with the upper hanger frame, the upper part of each movable support is provided with a T-shaped frame, and two ends of the upper part of each T-shaped frame are symmetrically provided with steel wire rope connectors; the top of the movable support is hinged with the bottom of the T-shaped frame; each movable support is provided with an anti-swing mechanism for controlling the swing amplitude of the T-shaped frame;

the two steel wire rope connectors on the T-shaped frames at the left end and the right end of the upper hanger frame are distributed along the front-back direction, and the two steel wire rope connectors on the T-shaped frames at the front end and the back end of the upper hanger frame are distributed along the left-right direction;

each steel wire rope connecting head is connected with a steel wire rope, and the other end of each steel wire rope upwards crosses the corresponding lifting pulley and then is wound on the lifting winding drum; the lifting pulley and the lifting winding drum are arranged on the trolley frame;

when the T-shaped frames are horizontal, two steel wire rope connectors on each T-shaped frame and two steel wire ropes between the corresponding lifting pulleys form two isosceles trapezoid waists; two isosceles trapezoids in which the steel wire ropes on the two opposite T-shaped frames are positioned are symmetrically arranged, and the included angle between the isosceles trapezoid in which the steel wire ropes on the left and right T-shaped frames are positioned and the plumb surface extending in the front-back direction is equal to the included angle between the isosceles trapezoid in which the steel wire ropes on the front and back T-shaped frames are positioned and the plumb surface extending in the left-right direction; the four isosceles trapezoids of the four T-shaped frames where the steel wire ropes are located are kept identical when the T-shaped frames are in a horizontal state.

2. A hoisting rope stabilized motion system for a yard bridge as claimed in claim 1, wherein a central axis of said hoisting drum extends in a fore-and-aft direction;

the central axis of a lifting pulley connected with the steel wire ropes on the T-shaped frames at the left and right ends of the upper frame of the lifting appliance extends along the left and right directions;

the central axis of a lifting pulley connected with the steel wire ropes on the T-shaped frames at the front and rear ends of the upper frame of the lifting appliance extends along the front and rear directions;

the steel wire ropes connected to the T-shaped frames at the left and right ends of the upper hanger frame sequentially cross over respective lifting pulleys and respective guide pulleys upwards and then are wound on a lifting winding drum;

the guide pulley is arranged on the trolley frame.

3. A lifting steel wire rope stable motion system for a field bridge as claimed in claim 1, wherein the winding directions of the steel wire rope connected with the left steel wire rope connector on the T-shaped frame at the front and rear ends of the upper hanger frame and the steel wire rope connected with the two steel wire rope connectors on the T-shaped frame at the left end of the upper hanger frame on the lifting winding drum are the same;

and the winding directions of the steel wire ropes connected with the steel wire rope connectors on the right side of the T-shaped frames at the front end and the rear end of the upper hanger frame and the steel wire ropes connected with the two steel wire rope connectors on the T-shaped frame at the right end of the upper hanger frame on the lifting reel are consistent.

4. A hoisting steel wire rope stable motion system for a field bridge as claimed in claim 1, wherein the anti-swing mechanism comprises a controller, two jacking cylinders and two tension sensors;

bases are symmetrically arranged at two ends of the side wall of the movable support, and the bottom ends of the two jacking oil cylinders are respectively fixedly arranged on the bases at two sides; piston rods of the two jacking oil cylinders respectively correspond to the two ends of the T-shaped frame up and down;

the two tension sensors are respectively arranged on two steel wire rope connecting heads of the T-shaped frame, and the other ends of the tension sensors are connected with corresponding steel wire ropes;

the two tension sensors are in communication connection with the controller;

the controller receives the tension values measured by the two tension sensors and calculates the difference value of the two tension values;

when the tension values measured by the two tension sensors in the same anti-swing mechanism are both larger than a first set value and the absolute value of the difference value of the two tension values is larger than a second set value, the piston rod of the jacking oil cylinder which is positioned on the same side with the tension sensor with the smaller measured tension value extends upwards and abuts against the bottom end of the corresponding side of the T-shaped frame.

5. A lifting steel wire rope stable motion system for a field bridge as claimed in claim 4, wherein the top end of the piston rod of the lifting cylinder is provided with a rubber pad.

6. A lifting steel wire rope stable motion system for a field bridge as claimed in claim 1, wherein a cross beam is arranged at the position where the movable support is arranged on the upper hanger frame, and the bottoms of the two ends of the cross beam are hinged with the upper hanger frame through hinge shafts;

the cross beams at the left and right ends of the upper hanger frame extend along the front-back direction; the bottom parts of the cross beams at the left end and the right end of the upper frame of the lifting appliance are provided with slide rails extending along the front-back direction;

the cross beams at the front end and the rear end of the upper frame of the lifting appliance extend along the left-right direction; the bottom parts of the cross beams at the front end and the rear end of the upper frame of the lifting appliance are provided with slide rails extending along the left-right direction;

the bottom of the movable support is provided with a sliding block matched with a sliding rail at the bottom of the corresponding cross beam;

a screw rod is arranged at one end of the cross beam, and a motor is arranged at the end part of the screw rod;

and a nut in threaded connection with the screw rod is arranged in the movable support.

7. A lifting steel wire rope stable motion system for a field bridge as claimed in any one of claims 1 to 6, wherein the number of the lifting winding drums is one, and the lifting winding drum is located in the middle of the trolley frame;

eight steel wire ropes connected with the four T-shaped frames on the upper frame of the lifting appliance are consistent in winding direction on the lifting winding drum.

8. A lifting steel wire rope stable motion system for a field bridge as claimed in any one of claims 1 to 6, wherein the lifting reels are arranged in two and parallel left and right directions;

the steel wire rope connected with the steel wire rope connector on the left side of the T-shaped frame on the front end and the rear end of the upper hanger frame and the steel wire rope connected with the steel wire rope connectors on the two T-shaped frames on the left end of the upper hanger frame are wound on the lifting winding drum on the left side;

and the steel wire rope connected with the steel wire rope connector on the right side of the T-shaped frame on the front end and the rear end of the upper hanger frame and the steel wire rope connected with the two steel wire rope connectors on the T-shaped frame on the right end of the upper hanger frame are wound on the lifting winding drum on the right side.

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