JPS642878A - Breaker - Google Patents

Breaker

Info

Publication number
JPS642878A
JPS642878A JP62162036A JP16203687A JPS642878A JP S642878 A JPS642878 A JP S642878A JP 62162036 A JP62162036 A JP 62162036A JP 16203687 A JP16203687 A JP 16203687A JP S642878 A JPS642878 A JP S642878A
Authority
JP
Japan
Prior art keywords
striking
tool
strongly
striking tool
hammer body
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
JP62162036A
Other languages
Japanese (ja)
Other versions
JPH0763944B2 (en
JPH012878A (en
Inventor
Shigeru Miyagawa
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.)
YAMADA JUKI KK
Original Assignee
YAMADA JUKI KK
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 YAMADA JUKI KK filed Critical YAMADA JUKI KK
Priority to JP62162036A priority Critical patent/JPH0763944B2/en
Priority to AU11920/88A priority patent/AU598102B2/en
Priority to EP88102374A priority patent/EP0280195A3/en
Priority to KR1019880001836A priority patent/KR920001602B1/en
Publication of JPS642878A publication Critical patent/JPS642878A/en
Publication of JPH012878A publication Critical patent/JPH012878A/en
Publication of JPH0763944B2 publication Critical patent/JPH0763944B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

PURPOSE: To easily extract a striking tool strongly biting into a viscous struck object by providing the striking tool strongly vibrated in the axial direction by the striking force of a continuously reciprocated hammer body.
CONSTITUTION: When a hammer body is driven while a main body is lifted with a striking tool 18 kept strongly biting into an object G, the striking tool 18 pulled downward by the object G and located at the lower end of its moving stroke is struck by the hammer body, and a tool holder 34 is strongly pressed downward by this striking force. The striking tool 18 is further moved downward by the compression elastic deformation quantity of an elastic body 42 provided between the tool holder 34 and a lower case at this time, then the striking tool 18 is slightly lifted by the elastic returning force of the elastic body 42 in the next instant. The striking tool 18 located at the lower end of its motion is strongly vibrated in the axial direction by the striking force of the continuously reciprocated hammer body and is extracted from the object G.
COPYRIGHT: (C)1989,JPO
JP62162036A 1987-02-21 1987-06-29 Breaker Expired - Lifetime JPH0763944B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62162036A JPH0763944B2 (en) 1987-02-21 1987-06-29 Breaker
AU11920/88A AU598102B2 (en) 1987-02-21 1988-02-17 Percussion apparatus
EP88102374A EP0280195A3 (en) 1987-02-21 1988-02-18 Percussion apparatus with tool holder
KR1019880001836A KR920001602B1 (en) 1987-02-21 1988-02-20 Percussion apparatus

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP62-38397 1987-02-21
JP3839787 1987-02-21
JP62162036A JPH0763944B2 (en) 1987-02-21 1987-06-29 Breaker

Publications (3)

Publication Number Publication Date
JPS642878A true JPS642878A (en) 1989-01-06
JPH012878A JPH012878A (en) 1989-01-06
JPH0763944B2 JPH0763944B2 (en) 1995-07-12

Family

ID=26377645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62162036A Expired - Lifetime JPH0763944B2 (en) 1987-02-21 1987-06-29 Breaker

Country Status (4)

Country Link
EP (1) EP0280195A3 (en)
JP (1) JPH0763944B2 (en)
KR (1) KR920001602B1 (en)
AU (1) AU598102B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007203409A (en) * 2006-02-01 2007-08-16 Makita Corp Impact working tool
JP2013144346A (en) * 2012-01-16 2013-07-25 Hitachi Koki Co Ltd Hammer
KR20160130501A (en) 2014-03-18 2016-11-11 가부시키가이샤 고베 세이코쇼 Welded titanium pipe and welded titanium pipe manufacturing method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905248A1 (en) * 1989-02-21 1990-08-23 Eco Air Drucklufttechnik Gmbh HOLDING CAP SECURITY FOR AIR HAMMER
US5363835A (en) * 1992-08-31 1994-11-15 Rocktec Limited Nose block assembly
JP4525904B2 (en) * 2004-06-08 2010-08-18 日立工機株式会社 Impact tool
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
CN214723936U (en) 2018-01-26 2021-11-16 米沃奇电动工具公司 Impact tool

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB399773A (en) * 1932-09-12 1933-10-12 Frank Hills Improvements in or relating to pneumatic hammers and similar percussive tools
CH211989A (en) * 1938-09-29 1940-10-31 Bosch Gmbh Robert Tool holder for impact devices.
US2298719A (en) * 1940-12-12 1942-10-13 Chicago Pneumatic Tool Co Implement retainer
US2432331A (en) * 1945-04-02 1947-12-09 Joy Mfg Co Working implement retainer
GB618546A (en) * 1946-10-04 1949-02-23 John Wilbur Tierney Improvements in or relating to fluid pressure operated engines, such as pneumatic picks or concrete breakers
FR1090212A (en) * 1953-11-04 1955-03-29 Kango Electric Hammers Ltd Mechanically controlled impact tool
US2823040A (en) * 1955-10-03 1958-02-11 Chicago Pneumatic Tool Co Tool retainer for pneumatic hammer
US3179185A (en) * 1962-06-14 1965-04-20 Chicago Pneumatic Tool Co Demolition tool with shock attenuating means
IT964292B (en) * 1971-09-13 1974-01-21 Kango Electric Hammers Ltd IMPROVEMENTS RELATING TO MACHINES OR PORTABLE IMPACT TOOLS
DE2551125C2 (en) * 1975-11-14 1987-04-23 Robert Bosch Gmbh, 7000 Stuttgart Device on hand-held power tools for torque transmission
US4103747A (en) * 1977-01-14 1978-08-01 Finney James L Buffer spring for an impact tool
DE2844110A1 (en) * 1978-10-10 1980-04-24 Bosch Gmbh Robert HAND TOOL MACHINE, ESPECIALLY CHISEL HAMMER
AU550165B2 (en) * 1982-03-01 1986-03-06 Allied Steel and Tractor Products Inc. Synchronous vibratory impact hammer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007203409A (en) * 2006-02-01 2007-08-16 Makita Corp Impact working tool
JP2013144346A (en) * 2012-01-16 2013-07-25 Hitachi Koki Co Ltd Hammer
KR20160130501A (en) 2014-03-18 2016-11-11 가부시키가이샤 고베 세이코쇼 Welded titanium pipe and welded titanium pipe manufacturing method

Also Published As

Publication number Publication date
AU1192088A (en) 1988-08-25
JPH0763944B2 (en) 1995-07-12
AU598102B2 (en) 1990-06-14
EP0280195A2 (en) 1988-08-31
KR920001602B1 (en) 1992-02-20
EP0280195A3 (en) 1990-03-28
KR880009739A (en) 1988-10-04

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