JPS62163593U

JPS62163593U -

Info

Publication number: JPS62163593U
Application number: JP5197686U
Authority: JP
Priority date: 1986-04-07
Filing date: 1986-04-07
Publication date: 1987-10-17

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例による油圧打撃工具
の断面図、第２図は本考案の要部の詳細、構成を
示す部分側面図、第３図は第２図―線断面図
、第４図は他の実施例による要部の側面図、第５
図は第４図の―線断面図、第６図はさらに他
の実施例による要部の側面図、第７図は第６図の
―線断面図、第８図はさらに別の実施例によ
る要部の断面図、第９図、第１０図は本考案の作
用を説明するための部分拡大断面図である。１……打撃工具本体、２……シリンダ、２ａ…
…シリンダ前室、２ｂ……シリンダ後室（作動室
）、３……打撃ピストン、７……前室用給油路、
８……後室用給油路、９……油路開閉バルブ（バ
ルブ）、１４……シリンダ排油路、１５……第２
油路（排油通路）、１５ａ……第２油路ポート、
２１，２２，２３，２４……通路。 Fig. 1 is a sectional view of a hydraulic impact tool according to an embodiment of the present invention, Fig. 2 is a partial side view showing the details and configuration of the main parts of the invention, Fig. 3 is a sectional view taken along the line of Fig. 2; Figure 4 is a side view of the main parts according to another embodiment;
The figure is a cross-sectional view taken along the line -- of FIG. 4, FIG. 6 is a side view of the main part according to yet another embodiment, FIG. 7 is a cross-sectional view taken along the line -- of FIG. 6, and FIG. 9 and 10 are partially enlarged sectional views for explaining the operation of the present invention. 1... Impact tool body, 2... Cylinder, 2a...
...Cylinder front chamber, 2b...Cylinder rear chamber (working chamber), 3...Blow piston, 7...Front chamber oil supply path,
8... Rear chamber oil supply passage, 9... Oil passage opening/closing valve (valve), 14... Cylinder oil drain passage, 15... Second
Oil passage (oil drain passage), 15a...second oil passage port,
21, 22, 23, 24...Aisle.

Claims

[Scope of utility model registration request]

A cylinder formed in a striking tool body, a striking piston slidably fitted into the cylinder, and a valve that supplies and discharges hydraulic oil to a working chamber of the cylinder to enable the striking piston to move back and forth. In the hydraulic impact tool, the working chamber of the cylinder and the oil drain passage communicate with each other when the impact piston hits, and the passage for draining the hydraulic oil in the working chamber is formed between the outer peripheral surface of the impact piston and the inner peripheral surface of the cylinder. A hydraulic impact tool characterized by being provided between.