JPS642877A - Hammer drill - Google Patents

Hammer drill

Info

Publication number
JPS642877A
JPS642877A JP15839987A JP15839987A JPS642877A JP S642877 A JPS642877 A JP S642877A JP 15839987 A JP15839987 A JP 15839987A JP 15839987 A JP15839987 A JP 15839987A JP S642877 A JPS642877 A JP S642877A
Authority
JP
Japan
Prior art keywords
piston
velocity
drill bit
striking force
nonuniform
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.)
Granted
Application number
JP15839987A
Other languages
Japanese (ja)
Other versions
JPH012877A (en
JPH0811372B2 (en
Inventor
Yoshihiro Sakamoto
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP15839987A priority Critical patent/JPH0811372B2/en
Publication of JPS642877A publication Critical patent/JPS642877A/en
Publication of JPH012877A publication Critical patent/JPH012877A/en
Publication of JPH0811372B2 publication Critical patent/JPH0811372B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Percussive Tools And Related Accessories (AREA)

Abstract

PURPOSE: To provide strong striking force without utilizing a large-output motor by providing a nonuniform-velocity means setting the velocity of a piston larger in its forward path than in its return path.
CONSTITUTION: A switch handle is operated with the tip of a drill bit 8 kept in contact with a bored face and with its rear end kept in contact with a striker 33 to operate a small-output motor 2, and the rotation of the motor 2 is transferred to the drill bit 8 from an intermediate shaft 23 via a spindle 31 and a key 39 to rotate the bit 8. A piston 4 is reciprocated by the cam action of the positive motion cam (constituted of the cam groove 56 of a rotor 55 and the roller 57 of the piston 4) of a motion converting member 5 concurrently serving as a nonuniform-velocity means 6. The velocity of the piston 4 is set larger in its forward path than in its return path, the striker 33 is driven by a hammer 41 with strong striking force, the striking force is transferred to the drill bit 8, and a large-diameter hole is bored on a work.
COPYRIGHT: (C)1989,JPO
JP15839987A 1987-06-25 1987-06-25 Hammer drill Expired - Lifetime JPH0811372B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15839987A JPH0811372B2 (en) 1987-06-25 1987-06-25 Hammer drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15839987A JPH0811372B2 (en) 1987-06-25 1987-06-25 Hammer drill

Publications (3)

Publication Number Publication Date
JPS642877A true JPS642877A (en) 1989-01-06
JPH012877A JPH012877A (en) 1989-01-06
JPH0811372B2 JPH0811372B2 (en) 1996-02-07

Family

ID=15670893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15839987A Expired - Lifetime JPH0811372B2 (en) 1987-06-25 1987-06-25 Hammer drill

Country Status (1)

Country Link
JP (1) JPH0811372B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015045734A1 (en) * 2013-09-27 2015-04-02 日立工機株式会社 Impact tool
JP2016007658A (en) * 2014-06-23 2016-01-18 株式会社マキタ Reciprocation work tool
WO2020075736A1 (en) * 2018-10-12 2020-04-16 学校法人 関西大学 Drive mechanism and punching device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015045734A1 (en) * 2013-09-27 2015-04-02 日立工機株式会社 Impact tool
JP2016007658A (en) * 2014-06-23 2016-01-18 株式会社マキタ Reciprocation work tool
WO2020075736A1 (en) * 2018-10-12 2020-04-16 学校法人 関西大学 Drive mechanism and punching device
US11703110B2 (en) 2018-10-12 2023-07-18 The School Corporation Kansai University Drive mechanism and punching device

Also Published As

Publication number Publication date
JPH0811372B2 (en) 1996-02-07

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