Multi-stage telescopic arm device and deep-digging excavator comprising multi-stage telescopic arm device

A technology of telescopic arms and telescopic cylinders, which is applied in the field of deep excavators, can solve problems such as the inability to lift the inner cylinder, and achieve the effects of prolonging life and improving bending strength

Active Publication Date: 2015-06-17
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in the prior art deep digging excavator, when the inner cylinder is lifted inside the outer cylinder together with the sand excavated by the clamshell grab, the weight of the tube of the telescopic cylinder cannot be used as the lifting force, and there is a problem that the The problem of efficiently performing the lifting operation of the inner cylinder by the telescopic cylinder

Method used

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  • Multi-stage telescopic arm device and deep-digging excavator comprising multi-stage telescopic arm device
  • Multi-stage telescopic arm device and deep-digging excavator comprising multi-stage telescopic arm device
  • Multi-stage telescopic arm device and deep-digging excavator comprising multi-stage telescopic arm device

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Embodiment Construction

[0055] Hereinafter, embodiments of the deep excavator according to the present invention will be specifically described with reference to the drawings.

[0056] exist figure 1 Among them, reference numeral 1 denotes a deep digging excavator according to the present embodiment. The deep digging excavator 1 has a vehicle body composed of a crawler-type undercarriage 2 capable of self-propelling and a rotatably mounted undercarriage 2 . The upper rotating body 3 constitutes. This vehicle body is an object to be attached to the multi-stage telescopic arm device 11 described later.

[0057] The upper revolving body 3 is roughly composed of the following parts: a revolving frame 3A as a base; a cab 3B arranged on the front left side of the revolving frame 3A; a counterweight 3C provided on the rear end side of the revolving frame 3A; A structure chamber cover 3D in which mounted equipment (none of which is shown) such as an engine and a hydraulic pump is accommodated therein.

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Abstract

A telescopic arm (12), comprising an outer cylinder (13) and multiple stages of inner cylinder (21, 23), is provided on the distal end of a boom (4). The outer cylinder (13) has a telescopic cylinder (25) disposed thereon and telescopic stationary sheaves (31, 31') fixed thereon. The telescopic cylinder (25) is mounted on the outer cylinder (13) with a rod (25B) facing upward, and moves along the outer cylinder (13) with a tube (25A) as a free end. The tube (25A) of the telescopic cylinder (25) is provided with a sheave mounting fixture (30), and the sheave mounting fixture (30) is provided with telescopic movable sheaves (33, 33'). An expansion and contraction rope (34, 34') is wound on the telescopic stationary sheaves (31, 31') and the telescopic movable sheaves (33, 33').

Description

technical field [0001] The present invention relates to a multi-stage telescopic boom device suitable, for example, in civil engineering for digging deep into the ground, and to a deep digging excavator having a multi-stage telescopic boom device. Background technique [0002] In general, when digging a vertical pit on the ground in civil engineering, it is preferable to use a deep excavator. This deep digging excavator includes: a vehicle body capable of self-propelling; a boom provided on the body so as to be able to move in pitch; and a multi-stage telescopic boom device provided on the front end side of the boom. The composition of the multi-stage telescopic arm device includes: a telescopic arm, which has an outer cylinder extending in the vertical direction and a multi-stage inner cylinder; fixed pulleys for telescopic use fixedly arranged on the outer cylinder; Cylinder; a pulley mounting part installed on the telescopic cylinder and moving along the length direction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F3/39E02F3/47
CPCE02F3/47
Inventor 多田茂也稻元昭
Owner NIHON KENKI CO LTD
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