发明名称 |
BOOM STRUCTURE OF HYDRAULIC EXCAVATOR |
摘要 |
PROBLEM TO BE SOLVED: To provide the boom structure of a hydraulic excavator, in which a reinforcing plate is disused by increasing the strength of a welding section in a boom curved section and lightening a boom. SOLUTION: An upper plate 2, a lower plate 3 and a side plate 4 are combined in a box-shaped cross section, and a boom 1 curved in a chevron shape in the longitudinal direction is formed by welding the connecting sections of each plate. A J-shaped groove section 4a is fabricated to at least either one of a side-plate upper edge section or a side-plate lower edge section in a boom curved section at that time, and the boom 1 is formed by conducting T-joint welding to the side plate 4.
|
申请公布号 |
JP2000199240(A) |
申请公布日期 |
2000.07.18 |
申请号 |
JP19980374202 |
申请日期 |
1998.12.28 |
申请人 |
YUTANI HEAVY IND LTD;KOBE STEEL LTD |
发明人 |
NAKATANI TAKANORI;YOSHIKAWA SHUJI |
分类号 |
B23K9/00;E02F3/38;E02F9/14;(IPC1-7):E02F3/38 |
主分类号 |
B23K9/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|