CN215326604U

CN215326604U - Connecting structure of crane boom

Info

Publication number: CN215326604U
Application number: CN202121670563.3U
Authority: CN
Inventors: 刘莎莎; 李春光; 孟和苏乐德; 张恒佳; 赵麟; 刘宇川; 王星霖
Original assignee: Dalian Yilea Technology Development Co ltd; Dalian Yiliya Construction Machinery Co Ltd
Current assignee: Dalian Yilea Technology Development Co ltd; Dalian Yiliya Construction Machinery Co Ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-12-28
Anticipated expiration: 2031-07-22

Abstract

The utility model relates to a connecting structure of a crane boom; the cantilever crane comprises a plurality of cantilever crane standard sections which are connected in sequence, wherein each cantilever crane standard section is formed by welding an upper chord, a lower chord and a web member, and two adjacent cantilever crane standard sections are connected by a connecting joint; the connecting joint comprises an upper connecting block and a lower connecting block; the upper connecting block and the lower connecting block are respectively fixed on the upper chord and the lower chord of the two adjacent arm support standard sections; one half of one end of each of the upper connecting block and the lower connecting block, which deviates from the standard section of the arm support, is convex and the other half is concave; the upper connecting block is matched with the bulge and the recess of the lower connecting block; a key groove is formed in the intersecting surface of the upper connecting block and the lower connecting block in a matched manner, and the upper connecting block and the lower connecting block are fixedly connected through keys arranged in the key groove; the upper connecting block and the lower connecting block are respectively provided with a countersunk threaded hole, and the upper connecting block and the lower connecting block are connected through a screw arranged in the countersunk threaded hole. The structure of the utility model can realize the quick installation and disassembly of the crane boom.

Description

Connecting structure of crane boom

Technical Field

The utility model relates to the technical field of jib crane machinery, in particular to a connecting structure of a crane jib.

Background

At present, the boom connecting mode which is more mainstream is mostly a connecting mode of a pin shaft and lug plates, the pin shaft penetrates through the lug plates of the upper boom arm section and the lower boom arm section, the tail part of the pin shaft is fixed by adopting a cotter pin, but in the actual working process of the boom, the pin shaft can rotate in a shaft hole, the pin shaft and the shaft hole are continuously abraded, and the design strength of the connecting part and even the broken potential safety hazard are reduced along with the increase of the service time. In addition, in the processes of production, processing and arm support dismounting, the requirements on the processing size precision of the pin shaft and the lug plates are high, and the difficulty in mounting and dismounting the connecting pin shaft in a plurality of lug plates is also high. The difficulty of the installation and disassembly process of penetrating a pin shaft into or out of a plurality of lug plates is high, the time is consumed, the number of the pin shafts adopted in the whole crane jib is large, the installation and disassembly process of the crane jib is more complex and time-consuming, and the installation and disassembly difficulty is high. The connection form of the pin shaft and the multi-lug plate assembly has higher requirements on the processing size precision of the lug plate and the pin shaft, the manufacturing difficulty is higher, and further the production cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problems of high difficulty in mounting and dismounting, high processing requirement, difficulty in manufacturing and the like in the prior art, and provides the connecting structure of the crane boom, which is convenient to mount/dismount, simple to process, safe and reliable.

The utility model provides a connecting structure of a crane boom, which comprises a plurality of boom standard sections which are connected in sequence, wherein each boom standard section is formed by welding an upper chord member, a lower chord member and a web member, and two adjacent boom standard sections are connected by a connecting joint;

the connecting joint comprises an upper connecting block and a lower connecting block; the upper connecting block and the lower connecting block are respectively fixed on the upper chord and the lower chord of the two adjacent arm support standard sections;

one end of the upper connecting block, which is far away from the standard section of the arm support, is half convex and half concave; one end of the lower connecting block, which is far away from the standard section of the arm support, is convex in half and concave in half, and the upper connecting block is matched with the convex part and the concave part of the lower connecting block; a key groove is arranged in a matching way between the upper connecting block and the lower connecting block and in an intersecting surface parallel to the length direction of the standard arm support joint, and the upper connecting block and the lower connecting block are fixedly connected through a key arranged in the key groove;

the upper connecting block and the lower connecting block are respectively provided with a countersunk threaded hole perpendicular to the length direction of the arm support standard knot, and the upper connecting block and the lower connecting block are connected through a screw arranged in the countersunk threaded hole.

Furthermore, the two adjacent arm support standard sections are connected by a plurality of connecting joints.

Furthermore, the upper connecting block and the lower connecting block are respectively embedded on the upper chord and the lower chord of the two arm support standard sections.

Furthermore, a chamfer is arranged between the upper connecting block and the upper chord; and a chamfer is arranged between the lower connecting block and the lower chord.

Compared with the prior art, the connecting structure of the crane boom provided by the utility model has the following advantages:

1. the utility model adopts the connecting joint to connect the adjacent standard sections of the arm support together, so that the assembling and disassembling processes of the crane arm are very simple and convenient.

2. The structure and the processing mode of the connecting joint part are simple, and the requirement of high processing dimensional precision of the connecting mode of the pin shaft and the lug plate is avoided.

3. The connecting joint part adopts keys and screws to fix the connecting joint, is a universal standard part, is convenient to purchase and replace, and is convenient to use because the bolt connection belongs to large clearance fit.

4. According to the utility model, the key is embedded between the two connecting blocks, and the bolt connection adopts a mode of installing the screw in the countersunk hole, the connecting joint is smooth and flat as the outer surface of the chord member, no protrusion exists, the problem of interference with other nearby structures is avoided, and the crane boom adopting the novel connecting mode is attractive and regular in overall appearance.

This patent does not adopt otic placode, the round pin axle construction that requires much to the machining dimension precision, and the joint of upper and lower chord member is got up through middle key, then adopts bolted connection's mode again, and a plurality of screws are packed into in both sides reverse symmetry to accomplish the fixed connection between the jib loading boom. This novel connected mode does not have obvious structural shape sudden change on the chord member surface, and the outward appearance is smooth, need not to consider the interference problem of junction like round pin hub connection to whole dismouting process, very simple and convenient need not consider the problem that the round pin axle penetrated or worn out a plurality of connection otic placodes, only needs to buckle the dress in two connecting blocks with the key, adopts the screw to fasten two connecting blocks, and it will make things convenient for a lot to operate than round pin hub connection.

Drawings

FIG. 1 is a schematic view of a connection structure of a crane boom according to the present invention;

FIG. 2 is a schematic view of the attachment structure connection of the boom of the present invention;

FIG. 3 is a cross-sectional view of the attachment structure attachment of the boom of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 in accordance with the present invention;

FIG. 5 is a first schematic view of a connecting block on the connecting structure of the crane boom according to the present invention;

FIG. 6 is a second schematic view of a connecting block on the connecting structure of the crane boom according to the present invention;

reference numerals: 1. a standard section of a cantilever crane; 1-1, an upper chord; 1-2, web members; 1-3, a lower chord; 2. connecting a joint; 2-1, mounting a connecting block; 2-1, a lower connecting block; 2-3, a bond; 2-4, screws; 2-5, a key slot; 2-6, countersunk head threaded holes.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.

As shown in fig. 1-2, the connection structure of the crane boom provided by the embodiment of the utility model comprises a plurality of boom standard sections 1 connected in sequence, wherein each boom standard section 1 is formed by welding an upper chord 1-1, a lower chord 1-3 and a web member 1-2, and two adjacent boom standard sections 1 are connected by a connection joint 2; the chords of the two adjacent arm support standard sections are connected and fixed through the connecting joints 2, the arm support standard sections are integrally smooth, and the middle connecting positions have no structural mutation and are approximately the same as the square outer surfaces of the chords.

As shown in fig. 3 to 6, the connection joint 2 includes an upper connection block 2-1 and a lower connection block 2-2; the upper connecting block 2-1 and the lower connecting block 2-2 have the same structural form; the upper connecting block 2-1 and the lower connecting block 2-2 are respectively fixed on an upper chord 1-1 and a lower chord 1-3 of two adjacent arm support standard sections 1; the upper connecting block 2-1 is fixed on an upper chord of the first arm support standard knot in a welding mode; the lower connecting blocks 2-2 are fixed on the lower chord of the adjacent second arm support standard knot in a welding mode;

one half of one end of the upper connecting block 2-1 departing from the arm support standard knot 1 is convex and the other half is concave; one half of one end of the lower connecting block 2-2, which is far away from the arm support standard knot 1, is convex and the other half is concave, and the convex and the concave of the upper connecting block 2-1 and the concave of the lower connecting block 2-2 are matched; a key groove 2-5 is arranged in a matching surface parallel to the length direction of the arm support standard knot 1 between the upper connecting block 2-1 and the lower connecting block 2-2, and the upper connecting block 2-1 and the lower connecting block 2-2 are fixedly connected through a key 2-3 arranged in the key groove 2-5;

the upper connecting block 2-1 and the lower connecting block 2-2 are respectively provided with a countersunk threaded hole 2-6 perpendicular to the length direction of the arm support standard knot 1, and the upper connecting block 2-1 and the lower connecting block 2-2 are connected through a screw 2-4 arranged in the countersunk threaded hole 2-6; the material, size, number and distribution form of the screws and the keys are designed according to the load working condition of the specific arm support. When the arm support is stressed, the keys 2-3 bear shearing and extrusion stress, and the screws 2-4 do not bear shearing force and only play a role in lateral fixation.

The two adjacent arm support standard sections 1 are connected by a plurality of connecting joints 2.

The upper connecting block 2-1 and the lower connecting block 2-2 are respectively embedded on the upper chord 1-1 and the lower chord 1-3 of the two arm support standard sections 1.

A chamfer is arranged between the upper connecting block 2-1 and the upper chord 1-1; and a chamfer is arranged between the lower connecting block 2-2 and the lower chord 1-3.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some or all technical features may be made without departing from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connecting structure of a crane boom comprises a plurality of boom standard sections (1) which are connected in sequence, wherein each boom standard section (1) is formed by welding an upper chord (1-1), a lower chord (1-3) and a web member (1-2), and is characterized in that two adjacent boom standard sections (1) are connected by a connecting joint (2);

the connecting joint (2) comprises an upper connecting block (2-1) and a lower connecting block (2-2); the upper connecting block (2-1) and the lower connecting block (2-2) are respectively fixed on an upper chord (1-1) and a lower chord (1-3) of two adjacent arm support standard sections (1);

one half of one end of the upper connecting block (2-1) departing from the arm support standard knot (1) is convex and the other half is concave; one half of one end of the lower connecting block (2-2) departing from the arm support standard knot (1) is convex and the other half is concave, and the convex and the concave of the upper connecting block (2-1) and the concave of the lower connecting block (2-2) are matched; a key groove (2-5) is arranged in a matching surface parallel to the length direction of the arm support standard knot (1) between the upper connecting block (2-1) and the lower connecting block (2-2), and the upper connecting block (2-1) and the lower connecting block (2-2) are fixedly connected through a key (2-3) arranged in the key groove (2-5);

the upper connecting block (2-1) and the lower connecting block (2-2) are respectively provided with a countersunk threaded hole (2-6) perpendicular to the length direction of the arm support standard knot (1), and the upper connecting block (2-1) and the lower connecting block (2-2) are connected through a screw (2-4) arranged in the countersunk threaded hole (2-6).

2. The connection structure of a crane boom according to claim 1, characterized in that the two adjacent boom standard knots (1) are connected by a plurality of connection joints (2).

3. The connecting structure of the crane boom according to claim 1, wherein the upper connecting block (2-1) and the lower connecting block (2-2) are respectively embedded on the upper chord (1-1) and the lower chord (1-3) of the two boom standard sections (1).

4. The connecting structure of the crane boom according to claim 1, wherein a chamfer is arranged between the upper connecting block (2-1) and the upper chord (1-1); a chamfer is arranged between the lower connecting block (2-2) and the lower chord (1-3).