CN-121990479-A - Anti-derailing device for upper pulley of crane

CN121990479ACN 121990479 ACN121990479 ACN 121990479ACN-121990479-A

Abstract

The invention discloses a device for preventing a pulley on a crane from falling, which comprises a protective shell, wherein a transmission shaft is rotatably connected inside the protective shell, a rotating pulley is fixedly connected to the surface of the transmission shaft, a steel wire rope is connected to the surface of the rotating pulley in a sliding manner, limiting support plates are fixedly connected to the left end and the right end of the protective shell, fixing brackets are fixedly connected to the left end and the right end of the protective shell, a supporting cross rod is fixedly connected to the top of each fixing bracket, supporting clamping blocks are fixedly connected to the surface of each supporting cross rod, a fixing cross plate is fixedly connected to the left end and the right end of each protective shell, supporting support struts are fixedly connected to the front surface of each fixing cross plate, an anti-deflection frame is connected to the top of each supporting strut in a sliding manner, a distance adjusting screw is connected to the inner threads of each anti-deflection frame, locking nuts are connected to the surface threads of each distance adjusting screw, and limiting springs are fixedly connected to the rear ends of each anti-deflection frame.

Inventors

ZHAO CHANGJUN
LI JUN
XIE JIANWEN
JIA WEI
ZHONG LIJUN
ZHU WEIHUA
WANG YUEPENG
Niu Rixun
Cui Xinjuan

Assignees

内蒙古包钢钢联股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260202

Claims (10)

1. The anti-derailment device for the pulley on the crane is characterized by comprising a protective shell, wherein the inside of the protective shell is rotationally connected with a transmission shaft, the surface of the transmission shaft is fixedly connected with a rotating pulley, and the surface of the rotating pulley is slidingly connected with a steel wire rope; Limiting support plates are fixedly connected to the left end and the right end of the protective shell, fixing supports are fixedly connected to the left end and the right end of the protective shell, a supporting cross rod is fixedly connected to the top of each fixing support, and a supporting clamping block is fixedly connected to the surface of each supporting cross rod; The protection shell is characterized in that the left end and the right end of the protection shell are fixedly connected with fixed transverse plates, the front surfaces of the fixed transverse plates are fixedly connected with supporting struts, and the tops of the supporting struts are slidably connected with an anti-deflection frame.
2. The device for preventing the pulley on the crane from falling off as claimed in claim 1, wherein the inner thread of the anti-deflection frame is connected with a distance adjusting screw, the surface of the distance adjusting screw is connected with a locking nut in a threaded manner, and the rear end of the anti-deflection frame is fixedly connected with a limiting spring.
3. The device for preventing the pulley on the crane from falling off as claimed in claim 2, wherein the anti-deflection frame is positioned on the front surface of the protective shell, the distance adjusting screw penetrates through the locking nut and the anti-deflection frame to extend into the protective shell, and the top parts of the two fixing brackets are respectively extended out of the supporting cross rod and are welded with the supporting clamping blocks.
4. The device for preventing the pulley on the crane from falling off as claimed in claim 3, wherein two supporting struts and two limiting springs are arranged, and the two supporting struts and the two limiting springs are symmetrically distributed with the protective shell as a center.
5. The apparatus of claim 4, wherein the limit spring is disposed on top of the support bar and is in elastic contact with the back of the frame.
6. The anti-derailment device for a hoist pulley according to claim 5, wherein the number of the rotating pulleys and the number of the wire ropes are several, and the rotating pulleys and the wire ropes are distributed at equal intervals centering on the transmission shaft.
7. The anti-derailment device for the upper pulley of a crane according to claim 6, wherein the surface of the transmission shaft is fixedly connected with a plurality of rotating pulleys which are equidistantly distributed by taking the rotating pulleys as a center, the rotating pulleys together form a multi-stage guiding system, the rotating pulleys are used for promoting the steel wire rope to always keep a linear motion track in the running process, and each rotating pulley is in sliding fit with the same steel wire rope to form a continuous traction loop.
8. The device for preventing the pulley on the crane from falling off as claimed in claim 7, wherein the supporting clamping block is fixedly connected to the surface of the supporting strut, the limiting spring is positioned at the top of the supporting strut, and the fixed transverse plate is fixedly connected to the top of the supporting strut; The two fixing brackets and the two supporting cross bars are symmetrically distributed around the protective shell.
9. A method for using the anti-derailment device for the pulley on the crane according to claim 8 is characterized by comprising the following steps of; When the worker rotates the distance-adjusting screw to drive the locking nut 13 on the surface to move the anti-deflection frame at the front and back positions of the top of the supporting strut, the rotating pulley and the steel wire rope on the surface of the transmission shaft can be driven, the steel wire rope is prevented from sliding out of the groove in the rotating pulley, when the anti-deflection frame contacts with the front surfaces of the rotating pulley and the steel wire rope, the rotating pulley and the steel wire rope can be guaranteed to drive to generate deflection, the supporting transverse rods are respectively extended out of the tops of the two fixing brackets, supporting clamping blocks are welded on the supporting transverse rods and used for assisting in positioning and dispersing loads, the fixing transverse plates are further arranged on two sides of the protective shell, and are vertically connected with the supporting strut below to form a stable upright post type bearing structure.
10. The application of the anti-derailment device of the pulley on the crane, which is applied to the anti-derailment field of the pulley on the crane, can drive the rotating pulley and the steel wire rope on the surface of the transmission shaft when the locking nut on the surface is driven to move the anti-deflection frame at the front and back positions at the top of the supporting strut by rotating the distance-adjusting screw by a worker, so that the steel wire rope is prevented from sliding out of the groove in the rotating pulley, and the driving deflection of the rotating pulley and the steel wire rope can be ensured when the anti-deflection frame is contacted with the front surfaces of the rotating pulley and the steel wire rope.

Description

Anti-derailing device for upper pulley of crane Technical Field The invention belongs to the technical field of crane pulley falling prevention, and particularly relates to a crane upper pulley falling prevention device. Background The anti-drop device of the crane steel wire rope is a systematic protection mechanism specially set for preventing high risk accidents that the steel wire rope is separated from a lifting hook or a pulley. The structure of the device directly influences the safety hidden trouble of operators and the surrounding environment of equipment, and the actual working condition and the risk level possibly caused by execution defects of each link of the system need to be deeply considered in design. The anti-drop device is an important component of the hook pulley block of the crawler crane, and has the main function of preventing accidents caused by unexpected sliding of the heavy object in the hoisting process. The pulley in the prior art prevents falling the way structure, when the pulley carries out long-time use, leads to wire rope to roll out or bounce out from the inside of pulley groove to lead to wire rope to produce the falling way accident, be inconvenient for equipment staff to carry out nimble spacing regulation to pivoted wire rope. In view of the above factors, the anti-derailing device for the upper pulley of the crane is provided, so that the steel wire rope is prevented from sliding out of the groove in the rotating pulley, and when the anti-deviation frame is contacted with the front surfaces of the rotating pulley and the steel wire rope, the rotating pulley and the steel wire rope can be ensured to drive to deviate. Disclosure of Invention The invention aims to provide a device for preventing a pulley on a crane from falling off so as to solve the problems in the background technology. The invention aims at realizing the technical scheme that the anti-derailing device for the pulley on the crane comprises a protective shell, wherein the inside of the protective shell is rotationally connected with a transmission shaft, the surface of the transmission shaft is fixedly connected with a rotating pulley, and the surface of the rotating pulley is slidingly connected with a steel wire rope; Limiting support plates are fixedly connected to the left end and the right end of the protective shell, fixing supports are fixedly connected to the left end and the right end of the protective shell, a supporting cross rod is fixedly connected to the top of each fixing support, and a supporting clamping block is fixedly connected to the surface of each supporting cross rod; The protection shell is characterized in that the left end and the right end of the protection shell are fixedly connected with fixed transverse plates, the front surfaces of the fixed transverse plates are fixedly connected with supporting struts, and the tops of the supporting struts are slidably connected with an anti-deflection frame. Further, the inside threaded connection of preventing the frame is had the roll adjustment screw rod, the surface threaded connection of roll adjustment screw rod has locking nut, the rear end fixedly connected with spacing spring of preventing the frame. Further, the anti-deflection frame is located on the front face of the protective shell, the distance adjusting screw penetrates through the locking nut and the anti-deflection frame to extend to the inside of the protective shell, and the top of the two fixing brackets are provided with supporting cross bars which are respectively extended out and are welded with supporting clamping blocks. Further, the number of the supporting struts and the limiting springs is two, and the two supporting struts and the limiting springs are symmetrically distributed with the protective shell as a center. Further, the limit spring is arranged at the top of the supporting strut and is elastically contacted with the back of the frame. Further, the rotating pulleys and the steel wire ropes are arranged in a plurality, and the rotating pulleys and the steel wire ropes are distributed at equal intervals by taking the transmission shaft as a center. Further, the surface of the transmission shaft is fixedly connected with a plurality of rotating pulleys which are equidistantly distributed by taking the rotating pulleys as the center, the rotating pulleys jointly form a multi-stage guiding system, the rotating pulleys are used for enabling the steel wire rope to always keep a linear motion track in the running process, and each rotating pulley is in sliding fit with the same steel wire rope to form a continuous traction loop. Further, the supporting clamping block is fixedly connected to the surface of the supporting rod, the limiting spring is located at the top of the supporting rod, and the fixed transverse plate is fixedly connected to the top of the supporting rod; The two fixing brackets and the two supporting cross bars are symmetrically distribut