JPH03122136U

JPH03122136U -

Info

Publication number: JPH03122136U
Application number: JP3178590U
Authority: JP
Priority date: 1990-03-26
Filing date: 1990-03-26
Publication date: 1991-12-13

Description

[Brief explanation of drawings]

第１図はこの考案にかかる請求項第１項のスイ
ング角可変装置を示す要部平面図、第２図は第１
図のＡ部詳細図、第３図は第２図のＢより見たス
イングブラケツトの側面図、第４図は請求項第１
項のスイング角可変装置の実施例を示す要部平面
図、第５図はこの考案にかかる請求項第２項のス
イング角可変装置を示す一部切欠き要部平面図、
第６図は請求項第２項のスイング角可変装置の実
施例を示す要部平面図、第７図は第５図のＣより
見たスイングブラケツトの側面図、第８図は小型
シヨベルの斜視図、第９図は従来技術のスイング
ブラケツト周辺を示す要部平面図、第１０図は従
来技術のスイングブラケツトの側面図である。２……上部旋回対、３，１４，２０……スイン
グブラケツト、４……スイングシリンダ、５……
作業アタツチメント、６……ブーム、９……スイ
ング中心軸、１０，１５，２１……スイングシリ
ンダ取付用ブラケツト、１３，１９……スイング
角可変装置、２３……スイング角変更用ブラケツ
ト。 FIG. 1 is a plan view of essential parts of the swing angle variable device according to claim 1 of the present invention, and FIG.
3 is a side view of the swing bracket seen from B in FIG. 2, and FIG. 4 is a detailed view of part A in the figure.
FIG. 5 is a partially cutaway plan view of essential parts showing an embodiment of the variable swing angle device according to claim 2, and FIG.
FIG. 6 is a plan view of essential parts showing an embodiment of the variable swing angle device according to claim 2, FIG. 7 is a side view of the swing bracket seen from C in FIG. 5, and FIG. 8 is a perspective view of a small shovel. 9 is a plan view of a main part showing the vicinity of a swing bracket of the prior art, and FIG. 10 is a side view of the swing bracket of the prior art. 2... Upper swing pair, 3, 14, 20... Swing bracket, 4... Swing cylinder, 5...
Work attachment, 6... Boom, 9... Swing center axis, 10, 15, 21... Swing cylinder mounting bracket, 13, 19... Swing angle variable device, 23... Swing angle changing bracket.

Claims

[Scope of Claim for Utility Model Registration] (1) A small excavator in which the boom is attached to the front part of the upper revolving structure via a swing bracket, and the working attachment is swung from side to side by operating a swing cylinder. The swing cylinder mounting bracket is removably attached to the swing bracket, and when changing the swing angle of the boom, the swing cylinder mounting bracket is configured to be reversible in the front-rear direction and replaced. Boom swing angle variable device. (2) In a small excavator in which the boom is attached to the front part of the upper revolving structure via a swing bracket, and the work attachment is swung from side to side by operating the swing cylinder, the swing cylinder is fixed to the swing bracket. Another bracket for changing the swing angle is removably attached to the mounting bracket, and when changing the swing angle of the boom, the bracket for changing the swing angle is attached to the swing bracket, and the swing cylinder is attached to the bracket for changing the swing angle. A variable swing angle device characterized in that it is configured so that it can be replaced.