EP-4737380-A1 - CRANE AND MOUNTING ASSEMBLY STRUCTURE

EP4737380A1EP 4737380 A1EP4737380 A1EP 4737380A1EP-4737380-A1

Abstract

Disclosed in the present invention are a crane and a mounting assembly structure. The crane comprises a boom, a luffing cylinder and a tower jib structure for function switching, wherein the tower jib structure comprises a jib frame, a tower jib connecting frame connected to the boom, and a mounting assembly structure, and the tower jib connecting frame and the jib frame are movably or fixedly connected to each other by means of the mounting assembly structure. The mounting assembly structure of a first type comprises a transition joint and a connecting switch, the transition joint comprising a first transition joint and a second transition joint. The first transition joint is arranged at a front end of the tower jib connecting frame; the second transition joint is arranged at a rear end of the jib frame; and the first transition joint is connected to or disconnected from the second transition joint by means of the connecting switch. Different from the mounting assembly structure of the first type, the mounting assembly structure of a second type further comprises a tower cap connected to the tower jib connecting frame, and a bottom jib section connected to the jib frame; and the first transition joint is arranged at a front end of the tower cap, and the second transition joint is arranged at a rear end of the bottom jib section. The present invention has the characteristics of simple operation, flexible use and safe operation.

Inventors

CHEN, XIANGDONG
FU, Yuqin
LI, BO
DING, Yubin
LI, Zhenkun
SHAO, YAN

Assignees

Xuzhou Heavy Machinery Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20241018

Claims (10)

A crane, comprising a boom and a luffing cylinder, and further comprising a tower jib structure for function switching, wherein the tower jib structure comprises a jib frame, a tower jib connecting frame connected to the boom, and a mounting assembly structure, the tower jib connecting frame and the jib frame are movably connected or fixedly connected to each other by means of the mounting assembly structure, and the luffing cylinder controls the boom to drive the tower jib connecting frame to raise and lower.
A mounting assembly structure having the tower jib structure of claim 1, comprising a transition joint and a connecting switch, wherein the transition joint comprises a first transition joint and a second transition joint; and the first transition joint is arranged at a front end of the tower jib connecting frame, the second transition joint is arranged at a rear end of the jib frame, and the first transition joint is connected to or disconnected from the second transition joint by means of the connecting switch.
A mounting assembly structure having the tower jib structure of claim 1, comprising a transition joint, a connecting switch, a tower cap connected to the tower jib connecting frame, and a bottom jib section connected to the jib frame; wherein the transition joint comprises a first transition joint and a second transition joint; and the first transition joint is arranged at a front end of the tower cap, the second transition joint is arranged at a rear end of the bottom jib section, and the first transition joint is connected to or disconnected from the second transition joint by means of the connecting switch.
The mounting assembly structure according to claim 2 or 3, wherein when the connecting switch is engaged, the tower jib connecting frame is connected to the jib frame, and the luffing cylinder controls the tower jib connecting frame to cause the jib frame to raise and lower; and when the connecting switch is disengaged, the tower jib connecting frame is disconnected from the jib frame.
The mounting assembly structure according to claim 4, wherein the tower jib structure further comprises a luffing winch, a luffing rope, and a connecting tie plate, and an end of the luffing rope extends from the luffing winch; the mounting assembly structure further comprises a support frame, both the support frame and the connecting tie plate extend from an end of the luffing rope away from the luffing winch, the other end of the support frame is connected to an end of the first transition joint, and the other end of the connecting tie plate is connected to an end of the jib frame away from the transition joint; and when the connecting switch is disengaged, operation of the luffing winch controls the luffing rope to cause the support frame to rotate, thereby driving the jib frame to raise or lower.
The mounting assembly structure according to claim 5, wherein at least one support frame is provided.
The mounting assembly structure according to claim 2 or 3, wherein the connecting switch is a pin, holes are formed in the first transition joint and the second transition joint, and the pin cooperates with the holes to achieve engagement and disengagement.
The mounting assembly structure according to claim 7, wherein the tower jib structure further comprises a conversion tie plate, and the first transition joint and the second transition joint are disconnected and connected through cooperation between the conversion tie plate and the pin.
The mounting assembly structure according to claim 2 or 3, wherein a plurality of transition joints and connecting switches cooperating with the transition joints are provided.
The mounting assembly structure according to claim 2 or 3, wherein at least two transition joints are symmetrically arranged from top to bottom in a lifting direction of the jib frame.

Description

TECHNICAL FIELD The present invention relates to the field of construction machinery, and more particularly to a crane and a mounting assembly structure. BACKGROUND Crane tower jib structures have advantages of high structural performance and good safety, and are therefore widely used in the engineering and mechanical fields. Existing tower jibs are closed structures composed of a jib frame, support frames, and connecting tie plates, where the support frames and the connecting tie plates cooperate to significantly improve the lifting capacity of the jib frame. When performing luffing operations on the aforesaid tower jibs, the operation can only be realized through a luffing winch. However, the operation is complex due to a high reeving ratio of a wire rope extending from the luffing winch. In addition, existing tower jibs are further provided with a mechanical anti-back-tipping structure. The mechanical anti-back-tipping structure is composed of an anti-back-tipping hinge point on a jib connecting frame, a mechanical anti-back-tipping strut, a counterweight, and an anti-back-tipping slideway provided on a bottom jib section. When the bottom jib section tilts backward to a certain angle, the anti-back-tipping strut engages with a counterweight slot to provide an anti-back-tipping function. However, the introduction of this structure makes the entire tower jib structure relatively complex, and since the anti-back-tipping strut cooperates with the counterweight slot in a movable manner, there is a risk of disengagement, resulting in unsafe operation. In addition, in actual use, some operating conditions with low lifting capacity requirements desire to operate only the jib frame without using the luffing winch, so as to simplify operation, increase operating speed, and shorten operation time. However, the existing tower jib structures are closed, which is not conducive to flexible use. SUMMARY Objectives: The present invention aims to provide a crane and a mounting assembly structure that are easy to operate, flexible in use, and safe to operate. Technical solution: The crane provided by the present invention includes a boom and a luffing cylinder, and further includes a tower jib structure for function switching, where the tower jib structure includes a jib frame, a tower jib connecting frame connected to the boom, and a mounting assembly structure, the tower jib connecting frame and the jib frame are movably connected or fixedly connected to each other by means of the mounting assembly structure, and the luffing cylinder controls the boom to drive the tower jib connecting frame to raise and lower. Technical solution: The mounting assembly structure provided by the present invention includes a transition joint and a connecting switch, where the transition joint includes a first transition joint and a second transition joint. The first transition joint is arranged at a front end of the tower jib connecting frame, the second transition joint is arranged at a rear end of the jib frame, and the first transition joint is connected to or disconnected from the second transition joint by means of the connecting switch. Technical solution: The mounting assembly structure provided by the present invention includes a transition joint, a connecting switch, a tower cap connected to the tower jib connecting frame, and a bottom jib section connected to the jib frame; and the transition joint includes a first transition joint and a second transition joint; and the first transition joint is arranged at a front end of the tower cap, the second transition joint is arranged at a rear end of the bottom jib section, and the first transition joint is connected to or disconnected from the second transition joint by means of the connecting switch. Further, when the connecting switch is engaged, the tower jib connecting frame is connected to the jib frame, and the luffing cylinder controls the tower jib connecting frame to cause the jib frame to raise and lower; and when the connecting switch is disengaged, the tower jib connecting frame is disconnected from the jib frame. Further, the tower jib structure includes a luffing winch, a luffing rope, and a connecting tie plate, and an end of the luffing rope extends from the luffing winch; the mounting assembly structure further includes a support frame, both the support frame and the connecting tie plate extend from an end of the luffing rope away from the luffing winch, the other end of the support frame is connected to an end of the first transition joint, and the other end of the connecting tie plate is connected to an end of the jib frame away from the transition joint; and when the connecting switch is disengaged, operation of the luffing winch controls the luffing rope to cause the support frame to rotate, thereby driving the jib frame to raise or lower. Further, at least one support frame is provided. Further, the connecting switch is a pin, holes are formed in the first transitio