EP2236249A3 - Hammer drill - Google Patents

Hammer drill

Info

Publication number
EP2236249A3
EP2236249A3 EP20100002955 EP10002955A EP2236249A3 EP 2236249 A3 EP2236249 A3 EP 2236249A3 EP 20100002955 EP20100002955 EP 20100002955 EP 10002955 A EP10002955 A EP 10002955A EP 2236249 A3 EP2236249 A3 EP 2236249A3
Authority
EP
Grant status
Application
Patent type
Prior art keywords
cam
ring
gear
torque
projections
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
EP20100002955
Other languages
German (de)
French (fr)
Other versions
EP2236249A2 (en )
EP2236249B1 (en )
Inventor
Yoshitaka Machida
Kiyonobu Yoshikane
Toshiro Hirayama
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.)
Makita Corp
Original Assignee
Makita Corp
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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D16/00Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003Clutches specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2211/00Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06Means for driving the impulse member
    • B25D2211/061Swash-plate actuated impulse-driving mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007Details of percussion or rotation modes
    • B25D2216/0015Tools having a percussion-only mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007Details of percussion or rotation modes
    • B25D2216/0023Tools having a percussion-and-rotation mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007Details of percussion or rotation modes
    • B25D2216/0038Tools having a rotation-only mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/165Overload clutches, torque limiters

Abstract

In a hammer drill (1), a torque limiter includes: a cam ring (14) adjacent to a gear (13), and configured to be provided onto a tool holder (6) so as to be unitarily rotatable with the tool holder (6) and to have cam projections (18) on a surface facing to the gear (13); rollers (21) received in corresponding through-holes (20) formed in the gear (13) and engageable with the cam projections (18) in their rotational directions; and urging means (washer (16) and coil spring (17)) configured to urge the rollers (21) toward the cam ring (14) so that the rollers (21) are brought into engagement with the cam projections (18), and when a torque applied to the tool holder (6) exceeds a setting torque, the rollers (21) pass the cam projections (18) within the through-holes (20) against the urging means and roll on the cam ring (14), so that the gear (13) slips on the cam ring (14) to thereby uncouple the torque transmission to the cam ring (14).
EP20100002955 2009-04-01 2010-03-19 Hammer drill Active EP2236249B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009089461A JP5431000B2 (en) 2009-04-01 2009-04-01 Hammer drill

Publications (3)

Publication Number Publication Date
EP2236249A2 true EP2236249A2 (en) 2010-10-06
EP2236249A3 true true EP2236249A3 (en) 2011-12-28
EP2236249B1 EP2236249B1 (en) 2015-09-09

Family

ID=42226459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100002955 Active EP2236249B1 (en) 2009-04-01 2010-03-19 Hammer drill

Country Status (3)

Country Link
EP (1) EP2236249B1 (en)
JP (1) JP5431000B2 (en)
CN (1) CN101856733B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012223844A (en) * 2011-04-18 2012-11-15 Makita Corp Hammer drill
JP2016060034A (en) * 2014-09-22 2016-04-25 株式会社マキタ Hammer drill

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5373905A (en) * 1991-07-08 1994-12-20 Robert Bosch Gmbh Hammer drill
GB2392966A (en) * 2002-09-13 2004-03-17 Black & Decker Inc Power tool with overload clutch and an arrangement for detecting tool bit blocking
EP2140981A1 (en) * 2008-07-03 2010-01-06 Makita Corporation Hammer drill

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6156068B2 (en) * 1982-11-26 1986-12-01 Shinjo Seisakusho Yk
JP3450558B2 (en) * 1995-12-25 2003-09-29 株式会社マキタ Electric tool
DE19707588B4 (en) * 1997-02-26 2005-08-18 Robert Bosch Gmbh Machine tool, in particular drill or percussion drill or hammer drill
JP3976187B2 (en) * 2002-11-20 2007-09-12 株式会社マキタ Hammer drill
JP4515181B2 (en) * 2004-07-20 2010-07-28 株式会社マキタ Electric hammer drill
JP5015653B2 (en) * 2007-05-01 2012-08-29 株式会社マキタ Hammer drill

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5373905A (en) * 1991-07-08 1994-12-20 Robert Bosch Gmbh Hammer drill
GB2392966A (en) * 2002-09-13 2004-03-17 Black & Decker Inc Power tool with overload clutch and an arrangement for detecting tool bit blocking
EP2140981A1 (en) * 2008-07-03 2010-01-06 Makita Corporation Hammer drill

Also Published As

Publication number Publication date Type
CN101856733B (en) 2012-08-22 grant
EP2236249A2 (en) 2010-10-06 application
JP5431000B2 (en) 2014-03-05 grant
CN101856733A (en) 2010-10-13 application
JP2010240759A (en) 2010-10-28 application
EP2236249B1 (en) 2015-09-09 grant

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