Arm joint for truss arm, truss arm, and crane with truss arm

A technology of truss arms and cranes, which is applied in the field of heavy machinery, can solve the problems of increased self-weight of truss arms and affecting lifting performance, etc., and achieve the effect of reducing truss structure size, material selection specifications and strength requirements
CN102530745AActive Publication Date: 2012-07-04ZOOMLION HEAVY IND CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZOOMLION HEAVY IND CO LTD
Publication Date
2012-07-04

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Abstract

The invention provides an arm joint for a truss arm. The arm joint comprises an arm joint body, top connection structures which are arranged on the top of the arm joint body, bottom connection structures arranged at the bottom of the arm joint body, and pull plates arranged on two sides of the arm joint body; the arm joint body has a truss structure and an extending axis; and the pull plates extend from the upper part to the lower part of the arm joint body, and the extending direction of the pull plate is almost parallel to that of the extending axis of the arm joint body. The invention also provides the truss arm and a crane with the truss arm. According to the arm joint for the truss arm, the truss arm and the crane with the truss arm, the truss arm can bear pressure and tension.
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Description

technical field

[0001] The invention relates to the field of heavy machinery, and in particular to a lattice jib section, a lattice jib and a crane with the lattice jib. Background technique

[0002] The boom structure of the crane is divided into lattice boom and box telescopic boom.

[0003] The lattice boom is mainly used in crawler cranes and ring rail cranes, etc. Its advantages are simple structure, large lifting capacity, small grounding ratio, and easy maintenance.

[0004] However, existing lattice booms, ie, lattice jibs, are mostly designed to bear compression and are not inclined to bear tension. Therefore, the commonly used lattice jib crane must be equipped with a mast and a tension plate. The mast, tension plate and lattice arm are arranged in a triangle, and the tension plate bears the tension. At this time, the lattice arm basically bears the pressure.

[0005] Moreover, with the increase of the lifting capacity of the crane, the cross-sectional area of ​​...

Claims

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