JPS59162373U

JPS59162373U - Crawler interval expansion/contraction mechanism

Info

Publication number: JPS59162373U
Application number: JP5676683U
Authority: JP
Inventors: 堺　俊己
Original assignee: 日立建機株式会社
Priority date: 1983-04-18
Filing date: 1983-04-18
Publication date: 1984-10-30

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 the drawing]

第１図は走行体を備えた作業機械としてのクローラクレ
ーンの側面図、第２図は走行体のトラックフレームと張
り出しビームとサイドフレームとの取り合わせを示す拡
大平面図、第３図ないし第６図は本考案の一実施を示す
もので、第３図は左右２個のクローラのうちの１個のク
ローラについての縦断正面図であってクローラ幅の拡幅
状態を示す図、第４図は第３図のＩＶ−ＩＶ’線断面図
、第５図はクローラ幅の拡張状態から縮小状態へ変更す
る途中の状態を示す縦断面図、第６図はクローラ幅の縮
小状態を示す縦断面図である。４・・・トラックフレーム、４ａ・・・張り出しビーム
、５・・・サイドフレーム、５ａ・・・サイドフレーム
に形　・成された取付孔、５ａ′・・・取付孔の下面、
６・・・クローラ幅拡縮操作用のシリンダ、７・・・先
端ブロック、７ａ・・・先端ブロックの下面、７ｂ・・
・同外端面、８・・・張り出しビームと先端ブロックを
結合している上部水平ピン、９・・・先端ブロックの位
置固定用の長孔、１０・・・先端ブロックのストッパピ
ンとしての下部水平ピン。Figure 1 is a side view of a crawler crane as a working machine equipped with a running body, Figure 2 is an enlarged plan view showing the arrangement of the track frame, overhang beam, and side frame of the traveling body, and Figures 3 to 6. 3 shows one implementation of the present invention, and FIG. 3 is a longitudinal sectional front view of one of the two left and right crawlers, showing a state in which the width of the crawler is widened, and FIG. FIG. 5 is a longitudinal sectional view showing a state where the crawler width is changing from an expanded state to a reduced state, and FIG. 6 is a longitudinal sectional view showing a state where the crawler width is reduced. . 4... Truck frame, 4a... Overhanging beam, 5... Side frame, 5a... Mounting hole formed in the side frame, 5a'... Bottom surface of the mounting hole,
6... Cylinder for crawler width expansion/contraction operation, 7... Tip block, 7a... Bottom surface of tip block, 7b...
・Outer end face of the same, 8... Upper horizontal pin that connects the overhanging beam and the tip block, 9... Long hole for fixing the position of the tip block, 10... Lower horizontal as a stopper pin of the tip block pin.

Claims

[Scope of utility model registration request]

By fitting the mounting holes formed in the left and right side frames into the overhanging beams provided on both sides of the truck frame, and operating the cylinders interposed between the truck frame and the left and right side frames. In the traveling body configured to be able to expand and contract the crawler width, a tip block is connected to the tip of the overhanging beam of the track arm via an upper horizontal pin, and the tip block is linked to the expansion and contraction operation of the crawler width. , mounted so as to be rotatable in upward and downward directions about the upper horizontal pin, and forming a long hole for fixing the position of the tip block in either the tip of the overhanging beam or the tip block;
A lower horizontal pin is provided on the other member, and the tip block is configured to be fixed in position between an expanded crawler width state and a contracted crawler width state through contact between the lower horizontal pin and the end of the elongated hole. Features a crawler spacing expansion and contraction mechanism.