Attachment mounting fixtures for construction machinery and construction machinery

Abstract

There is no need for a restricting mechanism for restricting the opening movement or opening angle of the movable mesh with respect to the fixed mesh, and the connecting pins are respectively accommodated in the pin receiving portions of the fixed mesh and the pin receiving portions of the movable mesh. It has: the guide surface of the connecting pin on the side of the movable occlusal part, which guides the connecting pin on the side of the movable occlusal part until it is accommodated in the receiving part on the side of the movable occlusal part; After the part side pin housing part, when the movable joint part is brought close to the movable joint part side connecting pin by the action of the operating arm of the construction machine, and the movable joint part side connecting pin is accommodated in the movable joint part side pin receiving part , to prevent excessive closing of the movable articulation relative to the fixed articulation, so that the movable articulation side connecting pins with the smallest pin interval and the largest pin interval installed in the various attachments of the construction machine, make the movable articulation The joint pin on the joint side abuts against the guide surface of the joint pin on the movable joint side.

Description

technical field [0001] The invention relates to an accessory installation fixture of engineering machinery such as a power excavator and the engineering machinery. Background technique [0002] Patent Document 1: Japanese Unexamined Patent Publication No. 2011-231505 [0003] Patent Document 2: Japanese Utility Model Registration No. 3134696 [0004] Patent Document 3: Japanese Patent Application Laid-Open No. 2006-169886 [0005] Patent Document 4: Japanese Patent No. 6211324 [0006] However, in the attachment mounting jigs for construction machines described in the above-mentioned Patent Documents 1 to 3, after the connecting pins are respectively engaged with the fixed engagement part and the movable engagement part which are open at one end, it is necessary to use a restraint material and a coil spring, A screw, a bucket cylinder, or the like applies force to separate the fixed meshing portion from the restricting mechanism of the movable meshing portion, so there is...

AI Technical Summary

Problems solved by technology

[0006] However, in the attachment mounting jigs for construction machines described in the above-mentioned Patent Documents 1 to 3, after the connecting pins are respectively engaged with the fixed engagement part and the movable engagement part which are open at one end, it is necessary to use a restraint material and a coil spring, There is a problem that the cost is correspondingly increased because a screw or a bucket cylinder is used to apply force to separate the fixed engagement part from the movable engagement part.

[0007] In addition, although a screw or a bucket cylinder is used to force the movable engagement part to separate from the fixed engagement part, since the fixed engagement part and the movable engagement part engaged by the connecting pin are in a state where one end is open, there is a connection pin. possibility of shedding

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