Truck frame for construction machine

Patent metadata

Field	Value
Publication number	US-9604680-B2
Application number	US-201514881754-A
Country	US
Kind code	B2
Filing date	Oct 13, 2015
Priority date	Nov 14, 2011
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

Left and right front flanges are provided respectively in left and right front legs in a center frame. Left and right rear flanges are provided respectively in left and right rear legs in the center frame. Left and right front leg mounting members, and left and right rear leg mounting members, which protrude toward the center frame are provided respectively in left and right side frames. The respective front flanges are placed on the respective front leg mounting members, which are respectively fastened by bolts inserted therebetween in the upper-lower direction. The respective rear flanges are placed on the respective rear leg mounting members, which are respectively fastened by bolts inserted therebetween in the upper-lower direction.

First claim

The invention claimed is:

1. A truck frame for a construction machine comprising:
a center frame on a central part of which a support cylindrical body is disposed, and that includes front legs and rear legs disposed at both sides in left-right directions thereof; and
left and right side frames that are respectively positioned at sides of said center frame in the left-right directions to be formed extending in the front-rear directions and are respectively mounted to ends of said front legs and said rear legs,
wherein said center frame comprises:
an upper plate on an upper surface side of which said support cylindrical body is disposed, and at both sides in the left-right directions of which upper front leg portions and upper rear leg portions are disposed;
a lower plate that is arranged to face said upper plate in the upper-lower directions and at both sides in the left-right directions of which lower front leg portions and lower rear leg portions are disposed;
a front plate that closes a front side position between said upper plate and said lower plate;
a rear plate that closes a rear side position between said upper plate and said lower plate; and
left and right side plates that respectively close left and right side positions between said upper plate and said lower plate,
wherein each of said left and right side frames comprises:
an inner surface plate positioned on a side of said center frame;
an outer surface plate arranged to face said inner surface plate to be spaced therefrom; and
an upper surface plate that connects an upper end of said inner surface plate and an upper end of said outer surface plate, wherein said center frame further comprises:
front flanges protruding in the front-rear directions from said lower front leg portions and rear flanges protruding in the front-rear directions from said lower rear leg portions; and
front bolt through holes that penetrate said front flanges in the upper-lower directions and rear bolt through holes that penetrate said rear flanges in the upper-lower directions,
wherein each of said left and right side frames further comprises:
a front leg mounting member that protrudes toward said center frame to be mounted to one of said front flanges and a rear leg mounting member that protrudes toward said center frame to be mounted to one of said rear flanges are respectively disposed in said inner surface plate; and
female bolt holes are disposed on said front leg mounting member and said rear leg mounting member respectively in positions corresponding to said front bolt through holes and said rear bolt through holes,
wherein in a state where said front and rear flanges of said center frame are placed respectively on said front mounting plate and said rear mounting plate of said left and right side frames, bolts are inserted in said front bolt through holes, rear bolt through holes and said female bolt holes, thereby mounting said left and right side frames to said center frame,
wherein each of said left and right side frames has an idler wheel disposed at one end and a drive wheel disposed at another end,
wherein a plurality of upper roller devices are positioned between said idler wheel and said drive wheel to be spaced from each other and disposed on said upper surface plate of each of said left and right side frames, and
wherein an inclined cover is disposed between said respective upper roller devices to be obliquely inclined downwards from said inner surface plate toward said outer surface plate on each of said left and right side frames.

Assignees

• Hitachi Construction Mach Co

Inventors

• Tochigi Kenichi

Classifications

• B62D55/08

  Endless track units; Parts thereof · CPC title

• B62D55/088 Primary

  with means to exclude or remove foreign matter, e.g. sealing means, self-cleaning track links or sprockets, deflector plates or scrapers · CPC title

• E02F9/121

  Turntables, i.e. structure rotatable about 360° · CPC title

• E02F3/32

  working downwardly and towards the machine, e.g. with backhoes · CPC title

• E02F9/02

  Travelling-gear, e.g. associated with slewing gears ({drives therefor E02F9/20}; for motor vehicles B60B, B60G; undercarriages for locomotives or railroad cars B61F; track-laying vehicles B62D; for cranes B66C23/18) · CPC title