CN2755060Y

CN2755060Y - Sweep with polygon casing section

Info

Publication number: CN2755060Y
Application number: CN 200420069267
Authority: CN
Inventors: 陈德初; 刘劲松; 张良栋
Original assignee: Puyuan Branch Co Zhonglian Heavy Industry Science & Technology Development Co
Current assignee: Puyuan Branch Co Zhonglian Heavy Industry Science & Technology Development Co
Priority date: 2004-11-25
Filing date: 2004-11-25
Publication date: 2006-02-01
Anticipated expiration: 2014-11-25

Abstract

The utility model discloses a hanging arm with a polygonal box-shaped section, which comprises an outer arm and an inner arm which is sheathed in the outer arm, wherein a cambered slide block (3) is arranged on an inner transition surface (6) in the shape of a circular arc on the outer arm (1), and the cambered slide block (3) is corresponding to an outer transition surface (7) in the shape of a circular arc which is supported with the inner arm (2) in a sliding way. The utility model is a hanging arm with a polygonal box-shaped section, which has the advantages that the inner arm can not sags and bends, and the utility model also has the advantages of stable section shape of the hanging arm, small stress of the slide block, simple manufacture technology and low manufacture cost.

Description

A kind of polygon box section arm

Technical field

The utility model relates to a kind of arm, particularly relates to a kind of polygon box section arm.

Background technology

Hoisting crane adopted multistage arm suit, and in order to improve the force-bearing situation of arm, polygon box section is mostly adopted in the cross section of arm in order to improve the lifting height.The outer arm of present polygon box section arm and the slip between the inner arm are adopted and are provided with the polylith smooth block at the outer arm inwall, and the flat wing plate of the inner arm of polygon box section is bearing on the smooth block.Be adopted as the polygon box section arm of kind of version, the bending of caving in easily of the flat wing plate of inner arm, arm cross sectional shape easy deformation, flat wing plate at inner arm need install local brace panel additional, the manufacture craft and the cost of manufacture of arm have been increased, adopt this version, also increased the stress of smooth block.

The utility model content

Technical problem to be solved in the utility model provides the bending of can not caving in of a kind of inner arm, and the arm cross sectional shape is stable, and the stress of slide block is little, the simple and low polygon box section arm of cost of manufacture of manufacture craft.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of polygon box section arm, comprise outer arm and be sleeved on the interior inner arm of outer arm, it is characterized in that: on the interior transition circle arc face of described outer arm, be provided with arc shaped slider, the outer transition circle arc face of the described inner arm of the corresponding sliding bearing of described arc shaped slider.

As a kind of improvement of the present utility model, on described outer arm, be hinged with and wave supporting base, described arc shaped slider be installed in described wave on the supporting base and with the corresponding supporting of transition circle arc face of described inner arm.

Adopt the polygon box section arm of technique scheme, change the smooth block of polygon box section arm bottom into arc shaped slider, bearing position moves on on the transition arcwall face from the flat wing plate in both sides, can significantly reduce the slide block local stress, the arm cross sectional shape is more stable, be difficult for the depression bending, and can remove the local brace panel of arm, improve arm manufacture craft and cost of manufacture.

In sum, the utility model is the bending of can not caving in of a kind of inner arm, and the arm cross sectional shape is stable, and the stress of slide block is little, the simple and low polygon box section arm of cost of manufacture of manufacture craft.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is another structural representation of the utility model.

The specific embodiment

Following structure the drawings and specific embodiments are described in further detail the utility model.

Referring to Fig. 1, on four interior transition circle arc faces 6 of hexagon limit box section outer arm 1, be provided with four arc shaped sliders 3, hexagon limit box section inner arm 2 is inserted in the hexagon limit box section outer arm 1, four outer transition circle arc faces 7 of four arc shaped slider 3 corresponding sliding bearing hexagon limit box section inner arms 2.

Referring to Fig. 2, on hexagon limit box section outer arm 1, be hinged with a plurality of left sides wave supporting base 4 and the right side wave 5, four arc shaped sliders 3 of supporting base be installed in respectively a left side wave supporting base 4 and right wave on the supporting base 5 and with four transition circle arc faces, the 7 corresponding supportings of hexagon limit box section inner arm 2.

Adopt the polygon box section arm of technique scheme, change the smooth block of polygon box section arm bottom into arc shaped slider 3, bearing position moves on on the transition arcwall face 7 from the flat wing plate in both sides, can significantly reduce the slide block local stress, the arm cross sectional shape is more stable, be difficult for the depression bending, and can remove the local brace panel of arm, improve arm manufacture craft and cost of manufacture.Arc shaped slider 3 can be applicable on the polygonal cross-section arms such as pentagon, heptagon or octagon.

Claims

1, a kind of polygon box section arm, comprise outer arm and be sleeved on the interior inner arm of outer arm, it is characterized in that: on the interior transition circle arc face (6) of described outer arm (1), be provided with arc shaped slider (3), the outer transition circle arc face (7) of the described inner arm of the corresponding sliding bearing of described arc shaped slider (3) (2).

2, a kind of polygon box section arm according to claim 1, it is characterized in that: on described outer arm (1), be hinged with and wave supporting base (4,5), described arc shaped slider (3) be installed in described wave that supporting base (4,5) is gone up and with the corresponding supporting of transition circle arc face (7) of described inner arm (2).