Telescopic jib and crane including telescopic jib

Abstract

The invention discloses a telescopic arm, which comprises a telescopic oil cylinder, a first-stage arm barrel, a second-stage arm barrel, a plug-in pin mechanism, a first-stage arm barrel tail mechanism, and a second-stage arm barrel tail mechanism, the plug-in pin mechanism and the telescopic oil cylinder. The cylinder barrel is connected and includes the base, the cylinder pin outer cylinder, the cylinder pin, and the arm pin push rod. There are annular chambers and seals between the cylinder pin outer cylinder and the cylinder pin, and between the cylinder pin and the arm pin push rod, forming two The first-stage telescopic oil cylinder; the first-stage arm tube tail mechanism is rigidly connected to the first-stage arm barrel, the second-stage arm barrel tail mechanism is rigidly connected to the second-stage arm barrel, and the first-stage arm barrel tail mechanism and the second-stage arm barrel tail mechanism are equipped with cylinders. The pin hole, the cylinder pin hole is connected with the cylinder pin in the horizontal direction; the arm pin lever, arm pin and return spring are arranged on the tail mechanism of the primary arm tube and the secondary arm tube tail mechanism, and the primary arm tube and the secondary arm tube Arm pin holes are arranged on the top, and the arm pin can be pulled out of the arm pin hole under the action of the arm pin lever or inserted into the arm pin hole under the action of the return spring.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a telescopic arm and a crane including the telescopic arm. Background technique [0002] The current cylinder arm pin structure in the telescopic arm of the prior art is generally a single arm pin with two cylinder pins or a single arm pin with four cylinder pins. In the design of this plug-in pin mechanism, the cylinder pin and the arm pin must be aligned on the axis of the telescopic cylinder. Staggered in direction, this technique results in a bulky overall structure. Applying the current technology takes up too much space, which will greatly affect the basic length and full extension of the telescopic arm. Contents of the invention [0003] In order to solve the technical problems in the above-mentioned prior art, the present invention provides a telescopic arm, including a telescopic oil cylinder, a primary arm barrel, a secondary arm barrel, a plug-in mechanism, a pr...

AI Technical Summary

Problems solved by technology

[0002] The current cylinder arm pin structure in the telescopic arm of the prior art is generally a single arm pin with two cylinder pins or a single arm pin with four cylinder pins. In the design of this plug-in pin mechanism, the cylinder pin and the arm pin must be aligned on the axis of the telescopic cylinder. Staggered directions, this technique results in a bulky overall structure

Applying the current technology takes up too much space, which will greatly affect the basic length and full extension of the telescopic arm

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