Crawler frame for construction machine
AssigneesKomatsu Ltd., Hitachi Construction Machinery Co., Ltd.
InventorsAkira Fukushima, Akio Ohta, Kohei Urase, Takaharu Nishimura
Life of this patent
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Abstract
In a crawler frame in which legs in a center frame are formed from cast steel, a simple structure is achieved by reducing the number of components. To this end, the crawler frame, which has a center frame composed of a central frame section for supporting a swing bearing and legs located on the right and left sides of the central frame section; and track frames disposed on the sides of the distal ends of the legs, respectively, of the center frame, is designed such that each of the legs is bifurcated into front and rear leg sections and the front and rear leg sections are respectively formed from cast steel.
Claims13
A crawler frame for a construction machine, said crawler frame comprising:
- a center frame including:
- (i) a central frame section for supporting a swing bearing and (ii) cast steel legs respectively located at right and left sides of the central frame section;
- and
- track frames disposed at distal ends of the respective legs of the center frame;
- wherein each of the cast steel legs is bifurcated into front and rear separately cast, cast steel leg sections;
- wherein a base section of each said leg has a two-part structure;
- wherein a base section of the front leg section of each said leg is securely welded to a base section of the rear leg section of the leg;
- and
- wherein the base section of each said leg is securely welded to the central frame section.
A crawler frame for a construction machine, said crawler frame comprising:
- a center frame including:
- (i) a central frame section for supporting a swing bearing and (ii) cast steel leas respectively located at right and left sides of the central frame section;
- and
- track frames disposed at distal ends of the respective legs of the center frame;
- wherein each of the cast steel legs is bifurcated into front and rear separately cast, cast steel leg sections;
- and
- wherein each of the front and rear leg sections of each said leg comprises a vertical wall which is formed from cast steel and which is integral with a base section of the respective one of the front and rear leg sections.
Dependencies are inferred from the claim text.