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CN-121974244-A - Crane pulley and pulley quick-changing method

CN121974244ACN 121974244 ACN121974244 ACN 121974244ACN-121974244-A

Abstract

The invention discloses a crane pulley and a pulley quick-changing method, which comprises pulley shafts and multiple pulley blocks matched with the pulley shafts, wherein the multiple pulley blocks comprise a first pulley and a second pulley, the first pulley is arranged at intervals, the two sides of the first pulley are symmetrically provided with the second pulley, the crane pulley comprises second spacers which divide the first pulley from the second pulley, the second spacers are 3, the crane pulley comprises pulley dummy shafts, the pulley dummy shafts are matched with the first pulley and the second pulley, the diameter of the pulley dummy shafts is smaller than that of the pulley shafts, the multiple pulley blocks are arranged on a pulley base and are matched with the pulley shafts for positioning, the first pulley is a D800 pulley, the second pulley is a D710 pulley, the first pulley and the second pulley are coaxially arranged, deep groove ball bearings are arranged at the central positions of the first pulley and the second pulley, and the pulley shafts are matched with the deep groove ball bearings.

Inventors

  • HOU KAIJUN

Assignees

  • 内蒙古包钢钢联股份有限公司

Dates

Publication Date
20260505
Application Date
20260325

Claims (9)

  1. 1. The crane pulley is characterized by comprising a pulley shaft (1) and a plurality of pulley blocks matched with the pulley shaft (1), wherein each pulley block comprises a first pulley (4) and a second pulley (5), the first pulleys (4) are arranged at intervals, and the second pulleys (5) are symmetrically arranged on two sides of the first pulley (4); the pulley further comprises a first spacer bush (2), wherein the first spacer bush (2) is symmetrically arranged on two pulley bases (8); the pulley further comprises second spacers (6), wherein the second spacers (6) separate the first pulley (4) from the second pulley (5), and 3 second spacers (6) are arranged; The pulley false shaft (7) is matched with the first pulley (4) and the second pulley (5), and the diameter of the pulley false shaft (7) is smaller than that of the pulley shaft (1); the multi-pulley block is arranged on the pulley base (8), and is matched with the pulley shaft (1) for positioning.
  2. 2. The crane pulley according to claim 1, characterized in that the first pulley (4) is a D800 pulley and the second pulley (5) is a D710 pulley, the first pulley (4) and the second pulley (5) being coaxially arranged; And deep groove ball bearings are arranged at the central positions of the first pulley (4) and the second pulley (5), and the pulley shaft (1) is matched with the deep groove ball bearings.
  3. 3. The crane pulley according to claim 2, characterized in that the diameter of the pulley dummy shaft (7) is reduced by 0.5mm compared with the diameter of the pulley shaft (1), and the pulley dummy shaft (7) is in clearance fit with the multi-pulley block and the second spacer sleeve (6).
  4. 4. A crane pulley according to claim 3, characterized in that the length of the pulley dummy shaft (7) is smaller than the sum of the lengths of the first pulley (4), the second pulley (5) and the second spacer (6).
  5. 5. The crane pulley according to claim 4, wherein one end of the pulley shaft (1) is provided with a contact plug which is in contact with the end face of the pulley base (8), the other end of the pulley shaft (1) extends out of the pulley base (8) and is fixed through a cotter pin or is matched with a threaded end of the pulley shaft (1) through a nut, and a gasket is arranged on one side of the cotter pin of the pulley shaft (1) and is positioned on the inner side of the cotter pin.
  6. 6. The crane pulley according to claim 5, further comprising a pulley cover (3), wherein the pulley cover (3) is divided into an upper pulley cover and a lower pulley cover, the pulley cover (3) is fixed on shaft sleeve plates (9) on two sides of the pulley base (8), and the cross section of the pulley cover (3) is in a convex shape.
  7. 7. A method for replacing a crane pulley according to claim 6, comprising the steps of; After a pulley block to be replaced is disassembled, a second spacer bush, a first pulley, a second pulley and a pulley dummy shaft are assembled under a line, wherein the diameter of the Hairn dummy shaft is reduced by 0.5mm compared with that of the pulley shaft, the pulley dummy shaft is in clearance fit with a plurality of pulley blocks and the second spacer bush, the length of the pulley dummy shaft is smaller than the sum of the lengths of the first pulley, the second pulley and the second spacer bush, the first spacer bush is arranged on a pulley base before the pulley dummy shaft is assembled, the second spacer bush, the first pulley, the second pulley and the pulley dummy shaft which are assembled under the line are horizontally arranged in the pulley base, the shaft holes on two sides of the pulley base are kept on the same axis, a copper rod is used for driving the pulley shaft on the right side, the pulley dummy shaft is ejected leftwards along with the movement of the pulley shaft, and the rapid replacement of the pulley block is completed.
  8. 8. A method according to claim 6, wherein the crane pulley is used in a quick change of a crane pulley.
  9. 9. The method for replacing the pulley of the crane is characterized in that the method for replacing the pulley of the crane is applied to quick replacement of the pulley of the crane, a pulley shaft is matched with a pulley dummy shaft, quick replacement of a pulley block is completed in a matched mode, the operation efficiency is improved, and the method is high in operability of welding connection and an integral pulley seat.

Description

Crane pulley and pulley quick-changing method Technical Field The invention belongs to the technical field of cranes, and particularly relates to a crane pulley and a pulley quick-changing method. Background The pulley block of part of the crane is welded on the structure by using welding connection and an integral pulley seat and a pulley seat, the pulley and a spacer are assembled in the pulley seat by using a pulley shaft, the disassembly is simpler, the pulley and the spacer are assembled along with the pulley shaft in a lower line, but when the pulley and the spacer are assembled, all parts are required to be fixed due to the fact that the pulley and the spacer are not assembled, all parts are required to be assembled before the wire is assembled, the pulley shaft is assembled together in the pulley seat, when the pulley shaft is impacted by assembly, the pulley shaft, the pulley inner hole and the spacer inner hole are required to keep higher coaxiality, the pulley shaft, the pulley inner hole and the spacer can be assembled by impacting the pulley shaft, the implementation is difficult, and the operation efficiency is low. In the application of Lu Feng 'fixed pulley advanced replacement method in portal crane', cutting the main beam of the vehicle body is adopted, the pulley replacement space is reserved, the upward replacement is optimized to the downward replacement, and the quick replacement is realized, but for pulleys with larger tonnage, the space is larger during the replacement, the main beam of the vehicle body needs to be cut out in a larger space, the stress and the stable operation of the main beam are influenced, potential safety hazards exist, accidents are easy to cause, and the method is not applicable to the replacement of pulley blocks in the welding connection and the integral pulley seat. In view of the above factors, the quick-change method for the crane pulley and the pulley avoids the situation that the axes of the pulley and the spacer cannot be centered when the crane pulley is on line, and solves the problems that the axes of the pulley and the spacer are not centered and the pulley shaft is blocked frequently when the pulley shaft is assembled back, so that the operation efficiency is improved. Disclosure of Invention The invention aims to provide a crane pulley and a pulley quick-changing method, so as to solve the problems in the background technology. The invention aims at realizing the technical scheme that the crane pulley comprises a pulley shaft and a plurality of pulley blocks matched with the pulley shaft, wherein the pulley blocks comprise a first pulley and a second pulley, the first pulley is arranged at intervals, and the second pulleys are symmetrically arranged on two sides of the first pulley; The pulley further comprises second spacers which separate the first pulley from the second pulley, and the number of the second spacers is 3; the pulley false shaft is matched with the first pulley and the second pulley, and the diameter of the pulley false shaft is smaller than that of the pulley shaft; the multi-pulley block is arranged on the pulley base, and the multi-pulley block is matched with the pulley shaft for positioning. Further, the first pulley is a D800 pulley and the second pulley is a D710 pulley, and the first pulley and the second pulley are coaxially arranged; And deep groove ball bearings are arranged at the central positions of the first pulley and the second pulley, and the pulley shaft is matched with the deep groove ball bearings. Further, the diameter of the pulley dummy shaft is reduced by 0.5mm compared with that of the pulley shaft, and the pulley dummy shaft is in clearance fit with the multi-pulley block and the second spacer bush; Further, the length of the pulley dummy shaft is smaller than the sum of the lengths of the first pulley, the second pulley and the second spacer bush. Further, one end of the pulley shaft is provided with a contact plug to be in contact with the end face of the pulley base, the other end of the pulley shaft, which extends out of the pulley base, is fixed through a cotter pin or is matched with a threaded end of the pulley shaft through a nut, and a gasket is arranged on one side of the cotter pin of the pulley shaft and located on the inner side of the cotter pin. Further, the pulley cover is divided into an upper pulley cover and a lower pulley cover, the pulley cover is fixed on the shaft sleeve plates on two sides of the pulley base, and the section of the pulley cover is in a convex shape. A crane pulley replacement method comprises the following steps; After a pulley block to be replaced is disassembled, a second spacer bush, a first pulley, a second pulley and a pulley dummy shaft are assembled under a line, wherein the diameter of the Hairn dummy shaft is reduced by 0.5mm compared with that of the pulley shaft, the pulley dummy shaft is in clearance fit with a plurality of pulley blocks and the second