JPS6433395A - Hydraulic impact tool - Google Patents

Hydraulic impact tool

Info

Publication number
JPS6433395A
JPS6433395A JP18989487A JP18989487A JPS6433395A JP S6433395 A JPS6433395 A JP S6433395A JP 18989487 A JP18989487 A JP 18989487A JP 18989487 A JP18989487 A JP 18989487A JP S6433395 A JPS6433395 A JP S6433395A
Authority
JP
Japan
Prior art keywords
piston
hammering
rod
abutting member
damper chamber
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
JP18989487A
Other languages
Japanese (ja)
Other versions
JP2537370B2 (en
Inventor
Kozo Fujikawa
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor 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
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP62189894A priority Critical patent/JP2537370B2/en
Publication of JPS6433395A publication Critical patent/JPS6433395A/en
Application granted granted Critical
Publication of JP2537370B2 publication Critical patent/JP2537370B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)

Abstract

PURPOSE: To surely pull out a drill rod by repeatedly hammering a shank rod in a retrieving direction via a piston member and an abutting member by using an impulsive hydraulic force generated by reciprocating motion of a hammering piston. CONSTITUTION: A shank rod 11 is disposed at a front portion of a hammering piston 30, which rod has its rear portion mounted in an axially slidable manner and is provided with a locking step portion 42. A damper chamber 50 is formed in front of a piston-shaped enlarged diameter portion 30a which can enter the damper chamber 50 at the time of no loading. Further, an abutting member 45 which can make contact with the engaging step portion 42 is provided, and a piston 47 capable of abutting against the abutting member is arranged in an operating chamber 48. Repeated reciprocating motion of the hammering piston 30 generates vibrations, and an impulsive hydraulic force transmitted from the damper chamber 50 to the operating chamber 48 via a hydraulic passage 51 causes repeated hammering of the shank rod 11 in a retrieving direction via the piston 47 and the abutting member 45. In this manner, a drill rod can efficiently and surely be pulled out.
JP62189894A 1987-07-28 1987-07-28 Hydraulic impact tool Expired - Lifetime JP2537370B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62189894A JP2537370B2 (en) 1987-07-28 1987-07-28 Hydraulic impact tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62189894A JP2537370B2 (en) 1987-07-28 1987-07-28 Hydraulic impact tool

Publications (2)

Publication Number Publication Date
JPS6433395A true JPS6433395A (en) 1989-02-03
JP2537370B2 JP2537370B2 (en) 1996-09-25

Family

ID=16248966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62189894A Expired - Lifetime JP2537370B2 (en) 1987-07-28 1987-07-28 Hydraulic impact tool

Country Status (1)

Country Link
JP (1) JP2537370B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014001496A (en) * 2012-06-15 2014-01-09 Tama Kayaku Kiko Kk Boring device
JP2016151091A (en) * 2015-02-16 2016-08-22 古河ロックドリル株式会社 Rock drilling machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014001496A (en) * 2012-06-15 2014-01-09 Tama Kayaku Kiko Kk Boring device
JP2016151091A (en) * 2015-02-16 2016-08-22 古河ロックドリル株式会社 Rock drilling machine

Also Published As

Publication number Publication date
JP2537370B2 (en) 1996-09-25

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