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

A telescopic arm and telescopic cylinder technology, applied in the field of deep digging excavators, can solve the problems of increased mass, increased mass of the telescopic arm, and increased frequency of telescopic rope replacement operations, etc., to achieve the goal of improving the bending strength and prolonging the service life Effect

Active Publication Date: 2015-06-24
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the conventional deep excavator has a problem that the frequency of replacement work for the telescopic rope increases.
In addition, in the prior art deep excavator, the number of pulleys constituting the fixed pulley unit for telescopic use and the pulleys constituting the movable pulley unit for telescopic use is large, so in order to prolong the life of the telescopic ropes, the number of each pulley is increased. In the case of the diameter of the pulley, the mass of each pulley also increases
As a result, there is a problem that the mass of the telescopic boom as a whole increases, and the stability of the deep excavator is impaired.

Method used

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

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Embodiment Construction

[0060]Hereinafter, embodiments of the deep excavator according to the present invention will be specifically described with reference to the drawings.

[0061] 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.

[0062] 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 such as an engine and a hydraulic pump (none of them is shown) is housed therein.

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Abstract

A telescopic arm (12), comprising an outer cylinder (13) and multiple stages of inner cylinders (21, 23), is provided on the distal end of a boom (4). The outer cylinder (13) is provided with a telescopic cylinder (25) and telescopic stationary sheave units (31, 31'). The telescopic cylinder (25) has a sheave mounting fixture (30) mounted thereon, and the sheave mounting fixture (30) is provided with telescopic movable sheave units (33, 33'). An expansion and contraction rope (34) is wound four times between each sheave (31A, 31B) of the telescopic stationary sheave unit (31) and each sheave (33A, 33B) of the telescopic movable sheave unit (33). An expansion and contraction rope (34') is wound four times between each sheave (31A', 31B') of the telescopic stationary sheave unit (31') and each sheave (33A', 33B') of the telescopic movable sheave unit (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
CPCE02F3/47E02F3/306E02F3/4136E02F9/003
Inventor 多田茂也稻元昭
Owner NIHON KENKI CO LTD
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