US 12,319,546 B2 · Telescopic boom

Abstract

A lightweight and high-rigidity telescopic boom in which strain during manufacturing is suppressed is disclosed. In a telescopic boom, a plurality of booms forms a telescope structure, and the telescopic boom includes a boom fixing mechanism that fixes a top boom disposed relatively inside at a predetermined position with respect to a first intermediate boom disposed relatively outside. The boom fixing mechanism includes a boom fixing pin that is provided to the top boom and advances and retreats with respect to the first intermediate boom, a fixing boss that is provided to the first intermediate boom and into which the boom fixing pin is inserted and extracted, and a gap maintaining member that is provided to the fixing boss and protrudes outward to maintain a gap between the first intermediate boom and a second intermediate boom disposed further outside.

Claims7

Dependent claims

A telescopic boom in which a plurality of booms forms a telescopic structure, the telescopic boom including a boom fixing mechanism configured to fix the boom disposed relatively inside at a predetermined position with respect to the boom disposed relatively outside, wherein

the boom fixing mechanism comprises:
a boom fixing pin attached to the boom disposed inside and configured to advance and retreat with respect to the boom disposed outside;
a fixing boss attached to the boom disposed outside and configured to allow the boom fixing pin to be inserted and extracted;
and
a gap maintaining member attached to a portion of an outward facing surface of the fixing boss and configured to protrude outward to maintain a gap between the boom disposed outside and a boom disposed further outside.

2 more elements

Dependencies are inferred from the claim text.

Telescopic boom

Life of this patent

Telescopic boom

Life of this patent

Abstract

Claims7