JPH03122135U

JPH03122135U -

Info

Publication number: JPH03122135U
Application number: JP3178490U
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より見た要
部側面図、第４図は第１図の実施例平面図、第５
図はこの考案にかかる請求項第２項のスイング角
可変装置を示す要部平面図、第６図は第５図の実
施例平面図、第７図は第５図のＣより見た要部側
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……上部旋回体、３，１４，２３……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……スイングシリンダ取
付用ブラケツト、１３，２２……スイング角可変
装置、１６……レバー、２４……ガイドサポート
、２８……スライドバー。 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.
A detailed view of part A in the figure, Figure 3 is a side view of the main part seen from B in Figure 2, Figure 4 is a plan view of the embodiment of Figure 1, Figure 5
The figure is a plan view of the main part showing the swing angle variable device of claim 2 according to this invention, FIG. 6 is a plan view of the embodiment of FIG. 5, and FIG. 7 is the main part seen from C in FIG. 8 is a perspective view of a small shovel, FIG. 9 is a plan view of the 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 rotating body, 3, 14, 23... Swing bracket, 4... Swing cylinder, 5...
Work attachment, 6... Boom, 9... Swing center axis, 10, 15... Swing cylinder mounting bracket, 13, 22... Swing angle variable device, 16... Lever, 24... Guide support, 28... slide bar.

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. A lever with a missing pin for swing cylinder mounting is fixedly attached to the swing cylinder mounting bracket of the swing cylinder, and the swing cylinder is connected to the above pin hole of the lever, and when changing the swing angle of the boom, the lever is A variable swing angle device for a boom, characterized in that the swing cylinder is configured to be coupled to the swing cylinder mounting bracket in a detached state. (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 left and right by operating a swing cylinder, a guide support is fixed to the swing bracket. , a slide bar is provided movably along the guide portion of the guide support, a swing cylinder mounting pin hole is drilled at the rear end of the slide bar, and a swing cylinder is coupled to the swing cylinder mounting pin hole, On the other hand, a locking means is provided for selectively locking the slide bar at a plurality of positions relative to the guide support, and the slide bar is locked at a required position relative to the guide support when changing the swing angle of the boom. A swing angle variable device for a boom, characterized in that it is configured as follows.