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Double arm type work machine

A technology of construction machinery and double arms, which is applied in the direction of mechanically driven excavators/dredgers, earth movers/shovels, construction maintenance, etc., which can solve the problems of weight increase and achieve the effect of suppressing the increase of output

Inactive Publication Date: 2009-12-16
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in order to increase the output of the front working machine, an increase in weight cannot be avoided, so it is difficult to achieve an increase in output while ensuring stability

Method used

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Embodiment Construction

[0107] Embodiments of the present invention will be described below using the drawings.

[0108] use Figure 1 to Figure 14 A first embodiment of the present invention will be described.

[0109] figure 1 as well as figure 2 It is a figure which shows the appearance of the dual-arm type hydraulic excavator 200 which is an example of a dual-arm construction machine concerning 1st Embodiment of this invention. figure 1 It is a side view of the dual-arm type hydraulic excavator 200, figure 2 It is a plan view of the dual-arm type hydraulic excavator 200 .

[0110] exist figure 1 as well as figure 2 Among them, the dual-arm type hydraulic excavator 200 has: a lower vehicle body 2 having a traveling body 1; an upper rotating body 3 provided on the lower vehicle body 2 in a rotatable manner; The cab 4 near the center; the first front working machine A and the second front working machine B provided on the left and right sides of the front part of the upper revolving body 3...

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PUM

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Abstract

A dual arm hydraulic excavator 200 has two front work devices A and B, which are provided on left and right sides of a front portion of an upper swing structure 3 and swingable in a top-bottom direction of the excavator 200. The front work devices A and B have arms 12a, 12b, booms 10a, 10b and working devices 20a, 20b, respectively. The average of angle a of the arm 12a relative to the boom 10a and the angle b of the arm 12b relative to the boom 10b is defined as an average arm angle c. A range of the average arm angle, in which the average arm angle c is larger than a predetermined threshold value c2, is defined as an unstable range N. A range of the average arm angle, which is present on an inner side of the unstable range and adjacent to the unstable range, is defined as a stable state limit range M. When the average arm angle c is in the stable state limit range M, a value of a drive signal is reduced to reduce operating speeds of the arms 12a and 12b. This can suppress a reduction in stability due to an increase in engine power required to operate two front work devices A and B.

Description

technical field [0001] The present invention relates to a construction machine used in structure dismantling construction, waste dismantling construction, road construction, building construction, civil engineering, etc., and particularly relates to a double-arm construction machine having two multi-joint front working machines. Background technique [0002] Generally, a construction machine such as a hydraulic excavator is configured such that a multi-joint type front working machine composed of a boom and an arm is connected to the upper rotating body so as to be able to pitch and move, and a shovel is attached to the tip of the arm so that it can swing freely up and down. However, sometimes a breaker, a crusher, a grapple, etc. are installed instead of a bucket to form a project used for structure dismantling construction, waste dismantling construction, civil engineering construction, etc. mechanical. Although this kind of engineering machinery generally has only one fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/08E02F9/20E02F3/96E02F9/24
CPCE02F3/964E02F9/2004E02F3/965E02F3/302E02F9/2033
Inventor 石井启范
Owner NIHON KENKI CO LTD