JPS642877A - Hammer drill - Google Patents
Hammer drillInfo
- 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
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
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)
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 |
-
1987
- 1987-06-25 JP JP15839987A patent/JPH0811372B2/en not_active Expired - Lifetime
Cited By (4)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080207 Year of fee payment: 12 |