Two-member connection structure for working machine

A technology of construction machinery and connecting structure, which is applied in the direction of connecting and mechanically driven excavators/dredgers, mechanical equipment, etc., can solve the problems of complicated production of connecting structures and high production costs, and achieves easy production, reduced production costs, and reduced production costs. effect of cost

Inactive Publication Date: 2010-08-25
HITACHI CONSTR MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As described above, in the prior art, considering the large force acting on the engaging portion of the flange portion 25 and the stopper 26 due to the deterioration of the lubrication state, it is necessary to pre-set the flange portion 25 Strength, the strength of the stopper 26, and the strength of the joint between the connecting pin 24 and the flange portion 25 increase, so the fabrication of the two-member connection structure becomes complicated and the fabrication cost tends to increase

Method used

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  • Two-member connection structure for working machine
  • Two-member connection structure for working machine
  • Two-member connection structure for working machine

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Embodiment Construction

[0025] Hereinafter, the best embodiment of the two-member connection structure of the construction machine for carrying out the present invention will be described with reference to the drawings.

[0026] 1 is a perspective view showing a hydraulic excavator as an example of a construction machine having a first embodiment of the two-member connection structure of the present invention, and FIG. 2 is an enlarged view of a main part of the A-A section of FIG. 1 . In addition, Fig. 2 shows only the left half. Although omitted in the figure, the right half forms a symmetrical structure to the left half with respect to the center line.

[0027] As shown in Fig. 1, as the construction machine equipped with the two-part connection structure of the present invention, for example, a hydraulic excavator has: a traveling body 1, a rotating body 2 disposed on the traveling body 1, and a vertically rotatable body mounted on On the rotating body 2, there is a front-end working machine 3 c...

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Abstract

A two-member connection structure for a working machine can hold, without the use of a stopper for restricting pivoting of a flange and a connection pin, an outer member and an inner member such that they can be relatively pivotable. [MEANS FOR SOLVING PROBLEMS] The two-member connection structure has a boom (4) mounted on a hydraulic excavator, an arm (5) placed on the inner side of the boom (4), an outer bushing (6) and an inner bushing (7) press-fitted into pin holes (4a, 5a) of the boom (4) and the arm (5), respectively, a connection pin (8) inserted in a hole (6a) of the outer bushing (6) and a hole (7a) of the inner bushing (7) and interconnecting the two members which are the boom (4) and the arm (5) such that the two members can pivot relative to each other, and flanges (9) installed integrally with opposite ends of the connection pin (8) and preventing falling out of the pin (8). The connection pin (8) is installed so as to be pivotable relative to both the outer bushing (6) and the inner bushing (7), and the flanges (9) are installed so as to be slidable relative to an outer end surface (6b) of the outer bushing (6) without being prevented from rotating relative to the boom (4).

Description

technical field [0001] The present invention relates to a two-part connection structure of a construction machine, such as a beam and an arm or an arm and a bucket of a hydraulic excavator, in which the two parts are relatively rotatably connected by a connecting pin. Background technique [0002] FIG. 5 shows an example of a known two-member connection structure of a construction machine, FIG. 5( a ) is a sectional view of main parts, and FIG. 5( b ) is a view corresponding to arrow B in FIG. 5( a ). Furthermore, Figure 5(a) only shows the left half. [0003] 5 shows a connection structure between an outer member such as a bucket 20 and an inner member such as an arm 21 disposed inside the bucket 20 , which are included in a hydraulic excavator, for example, a construction machine. The outer bush 22 is pressed into the pin hole 20 a of the bucket 20 , and the inner bush 23 is pressed into the pin hole 21 a of the arm 21 . A connecting pin 24 is inserted into the hole 22 a...

Claims

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Application Information

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IPC IPC(8): E02F3/38E02F3/40
CPCE02F9/006F16C11/04E02F9/123F16C2350/26Y10T403/32959Y10T403/32868
Inventor五木田修
OwnerHITACHI CONSTR MASCH CO LTD