JPS616552U

JPS616552U - Structure of boom of hydraulic excavator, etc.

Info

Publication number: JPS616552U
Application number: JP9027284U
Authority: JP
Inventors: 明人小杉; 英治咲谷
Original assignee: 油谷重工株式会社; 株式会社神戸製鋼所
Priority date: 1984-06-19
Filing date: 1984-06-19
Publication date: 1986-01-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は油圧ショベルの全体側面図＼第２図はこの考案
の構造を有する油圧ショベルのブームの側面図、第３図
はこの考案の構造の一例を示す縦−断面図、第４図は第
３図のＡ−Ａ線横断面図、第５図はこの考案の構造の他
の例を示す縦断面図、第６図はこの考案の構造のさらに
他の例を示す縦断面図、第７図はこの考案構造のさらに
他の例を示す横断面図、第８図は従来例に示すボス部横
断面図である。１・・・側板、２・・・上板、３・・・下板、５・・・
ボス、６・・・ボスの内側部、７・・・ボスの内側部の
端面、９・・・Ｙ字状補強リブ。Figure 1 is an overall side view of a hydraulic excavator, Figure 2 is a side view of the boom of a hydraulic excavator having the structure of this invention, Figure 3 is a vertical cross-sectional view showing an example of the structure of this invention, and Figure 4 is a side view of the hydraulic excavator. 3 is a cross-sectional view taken along the line A-A, FIG. 5 is a longitudinal sectional view showing another example of the structure of this invention, and FIG. 6 is a longitudinal sectional view showing still another example of the structure of this invention. FIG. 7 is a cross-sectional view showing still another example of this invented structure, and FIG. 8 is a cross-sectional view of a boss portion shown in a conventional example. 1...Side plate, 2...Top plate, 3...Lower plate, 5...
Boss, 6...Inner side of boss, 7... End face of inner side of boss, 9...Y-shaped reinforcing rib.

Claims

[Scope of utility model registration request]

A boom for a hydraulic excavator or the like that has a rectangular cross section with left and right side edges, an upper plate, and a lower plate, and has a boss on the left and right side plates that supports a pivot pin such as a hydraulic cylinder for raising and lowering the boom, The flange of the boss is applied from the outside of the side plate, the inner end surface of the boss is in the same plane as the inner surface of the side plate, the flange is welded and fixed to the side plate, and a Y-shaped reinforcing rib is inserted between the left and right side plates. Insert it and weld its upper end to the top plate,
Furthermore, by welding the left and right ends of the reinforcing ribs to the left and right side plates and the inner end surfaces of the boss, respectively, the Y-shaped reinforcing ribs are fixed to the upper plate, the left and right side plates, and the inner end surfaces of the boss. The structure of a boom such as a hydraulic excavator, in which the lower plate is welded to the side plate of the hydraulic excavator, and the lower end of the Y-shaped reinforcing rib is welded to the lower plate, and the lower plate is fixed to the left and right side plates and the reinforcing rib.