CN201087085Y

CN201087085Y - Trussed-beam type lengthened auxiliary elevator boom with variable cross-section

Info

Publication number: CN201087085Y
Application number: CNU2007200456255U
Authority: CN
Inventors: 张正得; 丁颖
Original assignee: Xuzhou Heavy Machinery Co Ltd
Current assignee: Xuzhou Heavy Machinery Co Ltd
Priority date: 2007-08-30
Filing date: 2007-08-30
Publication date: 2008-07-16
Anticipated expiration: 2017-08-30

Abstract

The utility model relates to a truss type variable cross section lengthened auxiliary jib boom, which belongs to the auxiliary jib boom of the engineering machinery. The auxiliary jib boom comprises a connecting frame, a rotating frame, lengthened sections, a transition section, a top section arm and a variable amplitude structure, wherein, the connecting frame, the rotating frame, the transition section and the top section arm are connected end to end through wrists, the lengthened sections are respectively connected between the rotating frame and the transition section and between the transition section and the top section arm, the variable amplitude structure is connected to the lower end of the rotating frame, and connecting pin holes are respectively arranged at the both ends of each frame. The utility model has the advantages that: firstly, the weight of the auxiliary jib boom is light, and the load-bearing capacity is high; secondly, different length of the gib arm is realized, and the operation range of the large sized crane is widened; thirdly, the middle section adopts the variable cross section, therefore, the weight can be remarkably lightened, and the hoisting performance is improved; fourthly, two deformations are provided, the length of the main jib boom can be lengthened, and the main jib boom can be used with the auxiliary jib boom through connection; fifthly, the windward area of the auxiliary jib boom is small and is suitable for the operation in the high wind pressure upper air or by the seaside; sixthly, the improvement to the hoisting performance is considerable, and the hoisting performance can be improved by 2 to 5 times in larger operating range.

Description

Truss-like variable section extended type auxiliary cargo boom

Technical field

The utility model relates to a kind of auxiliary cargo boom of construction machinery and equipment, particularly a kind of truss-like variable section extended type auxiliary cargo boom.

Background technology

Auxiliary cargo boom is the main load-carrying element of hoisting crane lift heavy, and generally its deadweight accounts for 4～10% of complete vehicle weight.But on large-scale hoisting crane, weight often accounts for more than 20% of complete machine weight, because the secondary arm that risen is installed in and carries out operation on the main crane arm, far away from hoisting crane, its deadweight is the principal element that influences the lift heavy amount, especially when descending operation by a relatively large margin, the own wt that therefore alleviates auxiliary cargo boom is the important channel that guarantees that certain hoisting capacity is arranged under certain amplitude, improve lifting performance.Existing hoisting crane auxiliary cargo boom Heavy Weight, load-carrying capacity are poor.

Summary of the invention

The purpose of this utility model is to provide a kind of: the truss-like variable section extended type auxiliary cargo boom that the hoisting crane auxiliary cargo boom is in light weight, load-carrying capacity is strong.

The purpose of this utility model is achieved in that this auxiliary cargo boom includes link span, swivel mount, extension, transition segment, epimerite arm and luffing structure, link span, swivel mount, transition segment and epimerite arm are connected from beginning to end by bearing pin, all be connected with extension between swivel mount and the transition segment and between transition segment and the epimerite arm, the lower end of swivel mount is connected with the luffing structure, at two ends of each shelf the connection pin-and-hole is arranged all.

Beneficial effect: owing to adopted such scheme, therefore, the structure of auxiliary cargo boom is selected lightweight truss type for use, approximate cantilever beam during its work, root is stressed big, Cross section Design is become transformable, reduce to the head constant gradient from root, for satisfying certain length and easy accessibility, realize different length by middle extension, rely on it weight can be risen to higher height, carrying is from the farther weight of hoisting crane, the hoisting crane auxiliary cargo boom is in light weight, load-carrying capacity is strong, has reached the purpose of this utility model.

Advantage: 1, the integral structure of auxiliary cargo boom adopts lattice truss shape structure, and is in light weight, load-carrying capacity is strong.2, realize the different length of arm by the middle segmentum intercalaris of different cross section, widened the scope of work of goliath.3, middle segmentum intercalaris adopts variable section, and significantly expendable weight improves lifting performance.4, the link span of auxiliary cargo boom has two kinds of distortion, and the main boom length that can extend also can be done the connection of auxiliary cargo boom and use.5, the auxiliary cargo boom wind area is little, suitable big high-altitude or the seashore operation of blast.6, under auxiliary cargo boom and the identical operating mode with box principal arm relatively, it is considerable to improve lifting performance, can improve 2-5 doubly when bigger operation amplitude.

Description of drawings

Fig. 1 is a constructional drawing of the present utility model.

The specific embodiment

Embodiment 1: this auxiliary cargo boom includes link span 1, swivel mount 2, extension 5, transition segment 3, epimerite arm 4 and luffing structure 6, link span, swivel mount, transition segment and epimerite arm are connected by bearing pin 8 head and the tail, all be connected with extension between swivel mount and the transition segment and between transition segment and the epimerite arm, the lower end of swivel mount 2 connects by luffing structure 6 is arranged, and at two ends of each shelf the pin-and-hole 7 of connection is arranged all.

The link span of this auxiliary cargo boom can be used as the lengthening principal arm and uses, also can connect frame uses, the lower end of swivel mount has the effect of luffing for the luffing structure, extension and back extension before extension divides can be installed lengthening 1-3 joint according to the design needs of car load, transition segment can be used for the different cross section of transition, adapt to and being connected of other support body with this, the end of epimerite arm is equipped with pulley, and all link spans connect from beginning to end by bearing pin and combine.

Claims

1. truss-like variable section extended type auxiliary cargo boom, it is characterized in that: this auxiliary cargo boom includes link span, swivel mount, extension, transition segment, epimerite arm and luffing structure, link span, swivel mount, transition segment and epimerite arm are connected from beginning to end by bearing pin, all be connected with extension between swivel mount and the transition segment and between transition segment and the epimerite arm, the lower end of swivel mount is connected with the luffing structure, at two ends of each shelf the connection pin-and-hole is arranged all.