Cooling Fan Mounting Structure for Construction Machine

Abstract

A structure for mounting a cooling fan ( 30 ) includes a spider ( 31 ) and blades ( 32 ) at free ends of mounting arms ( 31 c ) of the spider ( 31 ). A rotation center portion ( 31 b ) of the spider ( 31 ) is mounted on a rotating shaft ( 33 ) through a fan adaptor ( 60 ), the rotating shaft ( 33 ) being driven by an engine ( 27 ). A partition member ( 70 ) for closing gaps in the spider ( 31 ) is mounted on the fan adaptor ( 60 ). As a result of this configuration, the gaps between the mounting arms ( 31 c ) of the spider ( 31 ) can be reliably closed, and therefore the backflow of air from the downstream side (high pressure side) of the cooling fan ( 30 ) to the upstream side (low pressure side) thereof can be prevented.

What is claimed is: 
     
         1 . A structure for mounting a cooling fan of a construction machine, the cooling fan including a spider and a plurality of blades at free ends of mounting arms of the spider respectively, with a rotation center portion of the spider being attached, via a fan adapter, to a rotating shaft driven by an engine, and a partition member being attached to the fan adapter such that the partition member closes gaps between the mounting arms of the spider. 
     
     
         2 . The structure for mounting a cooling fan of a construction machine according to  claim 1 , wherein the partition member includes a cylindrical main body that removably engages over the fan adaptor, and a handguard-like partition plate around the main body of the partition member. 
     
     
         3 . The structure for mounting a cooling fan of a construction machine according to  claim 1 , wherein the partition member includes a circular plate interposed and mounted between the fan adapter and the rotation center portion of the cooling fan. 
     
     
         4 . The structure for mounting a cooling fan of a construction machine according to  claim 1 , wherein the partition member is made from resin.