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Upper frame of construction machine

A technology of construction machinery and frames, applied in the field of upper frames, which can solve problems such as inability to efficiently undertake torsional loads, strength design, manufacturing or adverse effects on costs

Active Publication Date: 2014-04-02
KOBELCO CONSTR MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] That is, in the upper frame 3 disclosed in Patent Documents 1 and 2, since the torsional load is not distributed to the entire upper frame 3 but concentrated on the middle portion A, the torsional load cannot be received efficiently.
[0014] Therefore, the middle part A needs to ensure greater strength than the side platforms B and C on both sides, thus bringing about adverse effects in terms of strength design, manufacture or cost.

Method used

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  • Upper frame of construction machine
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  • Upper frame of construction machine

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] refer to Figures 1 to 4 Embodiments of the present invention will be described.

[0025] The upper frame according to the embodiment is suitable for an upper revolving body of a hydraulic excavator. In the description below, for the Figure 5 The hydraulic excavators shown have the same structure, and are given the same reference numerals and their descriptions are omitted.

[0026] The upper frame 13 has a middle portion D located at the center in the vehicle width direction (left-right direction), a left side platform E connected to the left side of the middle portion D, a right side platform F connected to the right side of the middle portion D, and a middle The rear end of the part D and the rear ends of the left and right side platforms E, F are combined counterweight support members 15 .

[0027] The middle portion D has a pair of left and right vertical plates 14 , 14 that are approximately triangular in side view, and frame or plate materials (reference numer...

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PUM

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Abstract

The invention provides an upper frame of a construction machine, which comprises a counterweight support part (15) extending along the width direction of the whole machine,left and right side platforms (E, F) across the mid portion (D) of the machine and counterweight installation parts (23, 24, 25) arranged at the central portion, the left and right sides of the counterweight support part (15) for installing counterweights (9). The rear end of the mid portion (D) is connected with the rear ends of the left and right side platforms (E, F).The torsional load generated by the counterweight not only applies on the mid portion but also disperses to whole upper frame besides the two side platforms.

Description

technical field [0001] The present invention relates to an upper frame of an upper revolving body of construction equipment such as a hydraulic excavator. The upper frame has a platform structure in which side platforms are connected to left and right sides of a middle part. Background technique [0002] The background art will be described using a hydraulic excavator as an example of a construction machine. [0003] Such as Figure 5 As shown, the hydraulic excavator has a crawler-type undercarriage 1 and an upper revolving body 2 mounted on the undercarriage 1 , and the upper revolving body 2 can rotate around a longitudinal axis (rotation center) O perpendicular to the ground. The upper slewing body 2 has: an upper frame 3 as a base of the upper slewing body 2; a driver's cab 4 and various equipment mounted on the upper frame 3; boom) 5, arm 6 and working device 8 of bucket 7; and a counterweight 9 installed on the upper frame 3 rear end. [0004] In this specification,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/08
Inventor 植田登志郎藤本健一
Owner KOBELCO CONSTR MASCH CO LTD