TRACK FRAME FOR CONSTRUCTION MACHINE - HITACHI CONSTRUCTION MACHINERY

Title:

TRACK FRAME FOR CONSTRUCTION MACHINE

Document Type and Number:

WIPO Patent Application WO/2004/048182

Kind Code:

A1

Abstract:

A left front leg portion (31) is integrally formed by forging means with a center frame-side joining portion (31A), a side frame-side joining portion (31B), and an intermediate tube portion (31C). A joining edge (31A1) of the center frame-side joining portion (31A) and a joining edge (31B1) of the side frame-side joining portion (31B) are formed as opening edges having a rectangular shape. This reduces manufacturing costs of a track frame (11), enables that a longer welding bead is achieved around each of the joining edges (31A1, 31B1), and enhances the joining strength between the center frame-side joining portion (31A) and the center frame (12) and the joining strength between the side frame-side joining portion (31B) and a side frame (22).

Inventors:

URASE KOUHEI (JP)
ISHIKAWA HIRONAO (JP)
SAWAI SAORI (JP)

Application Number:

PCT/JP2003/014934

Publication Date:

June 10, 2004

Filing Date:

November 21, 2003

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACHINERY (JP)
KOMATSU MFG CO LTD (JP)
URASE KOUHEI (JP)
ISHIKAWA HIRONAO (JP)
SAWAI SAORI (JP)

International Classes:

B62D21/18; B62D55/10; (IPC1-7): B62D21/18

Foreign References:

JPS6259577U	1987-04-13
JPH01181972A	1989-07-19
JPS55134091U	1980-09-24
JPS4835138B1	1973-10-26
JPS5430417U	1979-02-28
JP2002146831A	2002-05-22
JP2001260958A	2001-09-26

Other References: