CN203212248U - Double-box type telescopic arm structure - Google Patents

Abstract

The utility model provides a double-box type telescopic arm structure. The arm frame of the structure is a double-box type multi-level arm and is composed of arm sections and a connection frame, wherein the arm sections of the same level are connected through the connection frame. According to the double-box type telescopic arm structure provided by the utility model, by adding a few components to the existing two same arm frames, the arm frames are connected to form a double-arm structure through a simple and easy-to-implement connection structure; the lateral stability is greatly improved, the hoisting capacity is enhanced, and the practicability is strong.

Description

Two box telescopic arm structures

Technical field

The utility model relates generally to engineering machinery field, particularly a kind of pair of box telescopic arm structure.

Background technology

The jib of car hosit or full ground hoisting crane all is that the box telescopic boom increases brachium by flexible box-structure at present, because it is overhanging beam, less stable, especially long-armed when long, more be difficult to control its amount of deflection, solution before is to strengthen its cross section and wall thickness or increase to have surpassed strut, but preceding a kind of method enlarging section and wall thickness can cause transporting over-wide, increase traffic cost; A kind of method in back makes jib change the freely-supported mode into by cantilevered fashion, solved the amount of deflection problems of too to a certain extent, but when the needs telescopic boom is longer, this kind mode can not change the above amount of deflection problems of too that causes owing to length is long of one-level arm, so this dual mode can not tackle the problem at its root.

Summary of the invention

A kind of pair of box telescopic arm structure of the utility model, the insoluble amount of deflection of box telescopic boom that overcomes prior art is excessive, and the cost height is difficult for technical barriers such as transportation, and a kind of pair of box telescopic arm structure is provided.

The utility model provides a kind of pair of box telescopic arm structure, and described pair of box telescopic arm structure is the multistage arm of two boxes, and it is made of box arm and link span, and same stages box arm connects by link span.

Described link span has two kinds, and a kind of is the space truss structure that tubing is welded into, and welds the back as the truss connecting device with the hinge ear; Another kind is the box-structure of sheet material welding, welds the back as the box connecting device with the hinge ear; Adding the strength at the arm head of each arm joint of box arm welds otic placode and is used for being connected with connecting device as the hinge ear.

Two jibs of the multistage arm of described pair of box are symmetrical.

Beneficial effect: set up less parts at existing two identical jibs, connect into arm structure by simple connection structure, greatly improve lateral stability, increase load-carrying ability, practical.

Description of drawings

Fig. 1 is the flexible preceding states of two box telescopic booms;

Fig. 2 is one-level arm and one-level arm junction front elevation;

Fig. 3 is one-level arm and one-level arm junction birds-eye view;

Fig. 4 is secondary arm and secondary arm junction front elevation;

Fig. 5 is secondary arm and secondary arm junction birds-eye view;

Fig. 6 is that two box telescopic booms reach long status.

1-one-level arm, 2-secondary arm, three grades of arms of 3-, 4-level Four arm, 5-Pyatyi arm, six grades of arms of 6-, seven grades of arms of 7-, eight grades of arms of 8-, eight grades of arm link spans of 9-, seven grades of arm link spans of 10-, six grades of arm link spans of 11-, 12-Pyatyi arm link span, 13-level Four arm link span, three grades of arm link spans of 14-, 15-secondary arm link span, 16-one-level arm link span, 17-truss structure hinge ear, the main arm joint of 18-hinge ear, 19-box-structure hinge ear, 20-cut with scissors ear among the figure.

The specific embodiment

Embodiment 1

Be example with eight grades of arms, as shown in Figure 1 before the box telescopic boom is flexible as yet with two one-level arms 1, secondary arm 2, three grades of arms 3, level Four arm 4, Pyatyi arm 5, six grades of arms 6, seven grades of arms 7, eight grades of arms 8 are respectively by one-level arm link span 16, secondary arm link span 15, three grades of arm link spans 14, level Four arm link span 13, Pyatyi arm link span 12, six grades of arm link spans 11, seven grades of arm link spans 10, the hinge ear of eight grades of arm link spans 9 connects together, wherein stressed bigger, the one-level arm 1 that amount of deflection is bigger, level Four arm 4 places, its link span 9 adopts space truss structure, then with this space truss structure and 17 welding of truss structure hinge ear, be connected to box telescopic boom one-level arm 1 by bearing pin, main arm joint hinge ear 18 places of level Four arm 4, as shown in Figures 2 and 3; In other stressed less relatively position, adopt steel plate to seal into the structure of box, weld with box-structure hinge ear 19, be connected hinge ear 20 places on other arm level of box telescopic boom by bearing pin, as shown in Figure 4 and Figure 5, eight grades of arm 8 positions, the inner lining of this box-structure brace panel, stressed to guarantee.The box telescopic boom be connected with turntable, chassis etc. finish after, flexible simultaneously with two box telescopic booms of pressure control with speed by two oil cylinders when entering mode of operation, flexible after as shown in Figure 6.

Embodiment 2

This utility model provides a kind of jib of superhuge box telescopic arm crane, and this jib is the multistage arm of two boxes, links together by the jib connecting device.The jib connecting device has two kinds, and a kind of is the space truss structure that tubing is welded into, and welds the back as the truss connecting device with the hinge ear; Another kind is the box-structure of sheet material welding, welds the back as the box connecting device with hinge ear 20; Adding the strength at the arm head of each arm joint of box arm welds otic placode and is used for being connected with connecting device as hinge ear 20.Its effect is two the identical arm joints that are rigidly connected, thereby makes the resistance to overturning of jib obtain increasing.Implementation procedure is as follows, and two existing identical box telescopic boom jibs are linked together by described connecting device, and for stressed bigger, the amount of deflection also arm end of big arm joint (as the one-level arm) adds the strength and is connected with the space truss connecting device by bearing pin; Be connected with the box connecting device by bearing pin and add the strength for the arm end that stressed less relatively arm saves (as the secondary arm).Certain two jibs are independent use according to actual needs also.

Claims (3)

1. two box telescopic arm structure, it is characterized in that: this jib is the multistage arm of two boxes, and it is made of box arm and link span, and same stages box arm connects by link span.

2. according to claim 1 pair of box telescopic arm structure, it is characterized in that: link span has two kinds, a kind of is the space truss structure that tubing is welded into, with hinge ear welding back as the truss connecting device; Another kind is the box-structure of sheet material welding, welds the back as the box connecting device with the hinge ear; Adding the strength at the arm head of each arm joint of box arm welds otic placode and is used for being connected with connecting device as the hinge ear.

3. according to claim 1 pair of box telescopic arm structure, it is characterized in that: two jibs of the multistage arm of its pair box are symmetrical.

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