JPS55112707A - Hammer drill - Google Patents

Hammer drill

Info

Publication number
JPS55112707A
JPS55112707A JP1769379A JP1769379A JPS55112707A JP S55112707 A JPS55112707 A JP S55112707A JP 1769379 A JP1769379 A JP 1769379A JP 1769379 A JP1769379 A JP 1769379A JP S55112707 A JPS55112707 A JP S55112707A
Authority
JP
Japan
Prior art keywords
rotation
cylinder
holder
cutter
striker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1769379A
Other languages
Japanese (ja)
Inventor
Yoshihiko Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP1769379A priority Critical patent/JPS55112707A/en
Publication of JPS55112707A publication Critical patent/JPS55112707A/en
Pending legal-status Critical Current

Links

Landscapes

  • Drilling And Boring (AREA)

Abstract

PURPOSE: To obtain rotation drilling of a hammer drill without exchanging a cutter or cutter holder by giving rotary displacement simply to a sleeve-shaped member equipped in a cylinder case.
CONSTITUTION: A cylinder 15, a shut holder 16, and a slide shaft 19 are rotated by the rotation of a driving pinion 4 through gear devices 5, 6, 10, and 12 for rotating a cutter holder 20. Meanwhile, a piston 27 in a cylinder 15 is reciprocated by the rotation of a crank shaft 22, and a striker 43 is reciprocated through an air chamber. In the reciprocation of the striker 43, a stroke toward the slide shaft 19 of the holder 20 is limited by pressure escape holes 15a, and 15b on the cylinder 15, and only the rotation for rotation drilling is transmitted to the cutter holder 20.
COPYRIGHT: (C)1980,JPO&Japio
JP1769379A 1979-02-16 1979-02-16 Hammer drill Pending JPS55112707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1769379A JPS55112707A (en) 1979-02-16 1979-02-16 Hammer drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1769379A JPS55112707A (en) 1979-02-16 1979-02-16 Hammer drill

Publications (1)

Publication Number Publication Date
JPS55112707A true JPS55112707A (en) 1980-08-30

Family

ID=11950885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1769379A Pending JPS55112707A (en) 1979-02-16 1979-02-16 Hammer drill

Country Status (1)

Country Link
JP (1) JPS55112707A (en)

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