JPS61180289U

JPS61180289U -

Info

Publication number: JPS61180289U
Application number: JP6598185U
Authority: JP
Priority date: 1985-04-30
Filing date: 1985-04-30
Publication date: 1986-11-10

Description

[Brief explanation of drawings]

図面は本考案に係る回転掘削機の実施態様を例
示し、第１図は正面図、第２図はスタビライザー
の一部切欠き正面図、第３図は要部の平面図、第
４図イ，ロ，ハ，ニは作用図である。１……拡底ビツト、２……スタビライザー、３
……セツターパイプ、４……先端ビツト、５……
拡翼ビツト、６……駆動機構、１５……円筒状板
部、１５ａ，１５ｂ，１５ｃ……分割板部分。 The drawings illustrate an embodiment of the rotary excavator according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a partially cutaway front view of the stabilizer, Fig. 3 is a plan view of the main part, and Fig. 4 is an illustration. , B, C, and D are action diagrams. 1... Expansion bit, 2... Stabilizer, 3
...Setter pipe, 4...Tip bit, 5...
Wing expansion bit, 6... Drive mechanism, 15... Cylindrical plate portion, 15a, 15b, 15c... Divided plate portion.

Claims

[Scope of utility model registration request]

a tip bit fixed to the lower end of the center pipe; a wing-spreading bit movable between a state substantially matching the rotation locus of the tip bit and a state protruding from the rotation locus in plan view; and the wing-spreading bit. a central shaft portion having a hollow portion communicating with the center pipe at a position above the bottom expansion bit configured to be able to adjust the excavation diameter within the movement range of the blade expansion bit; and its surroundings. The cylindrical plate portion is divided into a plurality of pieces in the circumferential direction, and each divided plate portion and the central shaft portion are connected by a fluid pressure cylinder device, so that the fluid pressure can be increased. A rotary excavator equipped with a stabilizer configured to be able to change the substantial outer diameter of the cylindrical plate portion by the expansion and contraction movement of a cylinder device.