JPS5992742U

JPS5992742U - drop hammer

Info

Publication number: JPS5992742U
Application number: JP18829082U
Authority: JP
Inventors: 和幸吉田; 俊行水野
Original assignee: 三和機材株式会社
Priority date: 1982-12-13
Filing date: 1982-12-13
Publication date: 1984-06-23

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案によるドロップハンマーの構成例を示す
縦断面図、第２図は第１図における油圧シリンダの縦断
面図、第３図は同作動油圧回路の一例を示す構成図、第
４図Ａ−Ｆは作動状態説明図である。１・・・ドロップハンマー、２・・・機枠、４・・・油
圧シリンダ、５・・・ピストンロッド、６・・・ハンマ
ー、７・・・シリンダ、８・・・ピストン、９・・・上
部室、１０・・・下部室、１１・・・上部ボート、１２
・・・下部ポート、１４、　１５・・・流通孔、１６・
・・スプール、１８゜１９・・・摺動部、２０・・・流
路、２１．２２・・・パイロット油圧導入孔。　　　　
　　　　　　　　　　　　　僑第１昭　　　　　　　　
　第２図３２．１〜〈φ 第５図１　　　ん　　−１ｉ　　　　　　３２．、ｊ１　　　　−− °↑　ｌFIG. 1 is a vertical cross-sectional view showing an example of the configuration of a drop hammer according to the present invention, FIG. 2 is a vertical cross-sectional view of the hydraulic cylinder in FIG. 1, FIG. 3 is a configuration diagram showing an example of the hydraulic circuit, Figures AF are explanatory diagrams of operating states. DESCRIPTION OF SYMBOLS 1... Drop hammer, 2... Machine frame, 4... Hydraulic cylinder, 5... Piston rod, 6... Hammer, 7... Cylinder, 8... Piston, 9... Upper chamber, 10... Lower chamber, 11... Upper boat, 12
... Lower port, 14, 15 ... Distribution hole, 16.
...Spool, 18°19...Sliding part, 20...Flow path, 21.22...Pilot hydraulic pressure introduction hole.
1st generation
Figure 2 32. 1~〈φ Fig. 5 1 -1 i 32. , j 1 −− °↑ l

Claims

[Scope of utility model registration request]

A cylinder supported by a machine frame, a double rod type piston rod that is inserted into the cylinder and has a piston on the outer periphery of the intermediate portion that divides the inside of the cylinder into upper and lower chambers, and connects a nozzle to the lower end of the piston rod. a spool inserted into the interior corresponding to the piston portion so as to be movable up and down; communication holes are formed on the outer periphery of the piston rod at positions immediately above and below the piston, and the upper surface of the spool and An upper pilot oil pressure introduction hole and a lower pilot oil pressure introduction hole for introducing pilot pressure are provided on the lower surface, and when the spool is located at either the upper or lowermost position in the piston rod, the spool is configured to open either of the above-mentioned upper or lower flow holes. a flange that opens to put both the communication holes in communication, and closes the upper or lower communication hole late when the piston rod is at the lowest position or the highest position to interrupt the communication between the two communication holes; A drop hammer characterized by having a shaped sliding part.