Counter weight mounting structure for building machinery

Abstract

A counterweight mounting structure for construction machine to which a counterweight is connected through a gap to an exterior constituting an upper rotating body is constituted such that a recessed groove is provided on an end on a connection side of the counterweight, an elastic soundproof material is installed in the recessed groove, and the soundproof material protruding from the recessed groove is brought in contact with, and pressed against an end on the connection side of the exterior when the counterweight is mounted. As a result, there is provided the counterweight mounting structure whose soundproof capability does not decrease even after the counterweight is mounted / dismounted.

Description

technical field [0001] The invention relates to a counterweight installation structure of construction machinery. Background technique [0002] A counterweight is mounted on an upper rotating body of the hydraulic excavator, and the counterweight is detachably mounted on a rear end portion of a rotating frame of the upper rotating body by using mounting bolts. [0003] There is a gap between the rear end of the rotating frame and the counterweight, and in order to prevent the noise or sound generated by the engine compartment from leaking to the outside through the gap, a gap is provided between the counterweight and the rear end of the rotating frame. For example, sound insulation materials made of foamed urethane. The sound deadening material is usually adhered to the upper surface of the rear end of the rotating frame with double sided adhesive tape. [0004] In addition, it is worth noting that although it is not for the purpose of sound insulation, Japanese Patent App...

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