US3918535A - Device for damping the recoil of a tool connected to a hammer machine - Google Patents

Device for damping the recoil of a tool connected to a hammer machine Download PDF

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Publication number
US3918535A
US3918535A US472809A US47280974A US3918535A US 3918535 A US3918535 A US 3918535A US 472809 A US472809 A US 472809A US 47280974 A US47280974 A US 47280974A US 3918535 A US3918535 A US 3918535A
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US
United States
Prior art keywords
tool
spring
machine housing
feeding force
rolling bearings
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.)
Expired - Lifetime
Application number
US472809A
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English (en)
Inventor
Ake Torsten Eklof
Gunnar Vigg Riss Romell
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Application granted granted Critical
Publication of US3918535A publication Critical patent/US3918535A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25D17/24—Damping the reaction force

Definitions

  • ABSTRACT A recoil damping device for a hammer machine in which a heavily prestressed spring is used, the spring being mounting between two supporting surfaces in the machine housing. The tool acts on the spring between the supporting surfaces.
  • a known device of this kind comprises a spring through which feeding force is transferred from the ma chine housing to the tool. That device has the disadvantage that the length of the spring is dependent on the applied feeding force. This means that the position in which the shank of the tool is situated when the hammer piston hits the shank is dependent on the applied feeding force.
  • a machine which comprises a recoil damper of that kind works optimally only together with a certain predetermined feeding force.
  • the present invention aims at doing away with the above mentioned disadvantage. This is achieved in that a spring is prestressed in the machine housing between two supporting surfaces arranged at a fixed axial distance. Since the spring is prestressed in the machine housing, an applied feeding force results therein that only a part of the force of the spring acting on the machine housing is transferred to the tool. This means that the stress in the spring and consequently the length of the spring is unchanged.
  • the hammer drilling machine shown in the FIGURE comprises a machine housing 1 in which a forwards and backwards movable hammer piston 3 is arranged.
  • a drill-sleeve 6 is by means of rolling bearings 8, 9 journalled in the machine housing 1.
  • a motor 2 rotates via a toothed wheel 5, the drill-sleeve 6, and a further sleeve 7 a tool 4 which is axially movable in the machine.
  • the rolling bearing 8 rests against a supporting surface 13 arranged in the machine housing 1.
  • a rolling bearing 10 rests against a supporting surface 14, which is arranged at a fixed axial distance from the surface 13, in the machine housing 1.
  • a transferring device rests with a surface 16 against the tool 4 and is pressed forwards by a prestressed spring 12 which via a sleeve 11 rests against the bearing 10.
  • the machine shown works in the following way.
  • the force from the prestressed spring 12 is transferred via the transferring device 15, the drill-sleeve 6, and the bearing 8 to the supporting surface 13 of the machine housing 1.
  • the tool 4 is pressed against the surface 16 on the transferring device 15. This does not mean that the stress in the spring is changed but only that the supporting surface 13 is unloaded.
  • the tool 4 is turned by means of the motor 2 at the same time as it is exposed to impacts from the hammer piston 3.
  • the tool 4 recoils from the material in which drilling occurs it hits the surface 16 on the transferring device 15 which through this is lifted out of contact with the drillsleeve 6 if the recoil force exceeds a certain value.
  • a recoil damping device for a hammer-type rockdrilling machine which includes a tool, a machine housing coupled to said tool and substantially constantly applying a feeding force to said tool in a working direction, means for additionally supplying impacts to said tool and means for rotating said tool, said tool recoiling after application of said impacts, said recoil damping device damping the recoil of said tool and comprising:
  • a spring coupled to said machine housing for transferring said feeding force from said machine housing to said tool
  • said tool being coupled to said machine housing so as to act on said spring between said rolling bearings;
  • said spring being dimensioned and heavily prestressed between said rolling bearings so that the length of said spring is substantially not influenced by said feeding force applied to said tool.
  • a device in which said means for rotating the tool is arranged between said spring and one of said rolling bearings, and wherein a further rolling bearing is provided, said tool rotating means being carried in the machine housing by said one rolling bearing and said further rolling bearing.
  • a device comprising means for transferring feeding force, which transferring means partly rests against the spring and partly against the tool.
  • a hammer-type rock-drilling machine comprising:
  • a machine housing coupled to said tool and including means for substantially constantly applying a feeding force to said tool in a working direction, means for additionally supplying impacts to said tool and means for rotating said tool, said tool recoiling after application of said impacts;
  • a spring coupled to said machine housing for transferring said feeding force from said machine housing to said tool
  • said tool being coupled to said machine housing so as to act on said spring between said rolling bearings;
  • said spring being dimensioned and heavily prestressed between said rolling bearings so that the length of said spring is substantially not influenced 4 being carried in the machine housing by said one rolling bearing and said further rolling bearing.
  • a device comprising means for transferring feeding force, which transferring means partly rests against the spring and partly against the tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
US472809A 1973-05-23 1974-05-23 Device for damping the recoil of a tool connected to a hammer machine Expired - Lifetime US3918535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7307224A SE391666B (sv) 1973-05-23 1973-05-23 Rekyldempningsanordning vid slaende maskiner

Publications (1)

Publication Number Publication Date
US3918535A true US3918535A (en) 1975-11-11

Family

ID=20317567

Family Applications (1)

Application Number Title Priority Date Filing Date
US472809A Expired - Lifetime US3918535A (en) 1973-05-23 1974-05-23 Device for damping the recoil of a tool connected to a hammer machine

Country Status (11)

Country Link
US (1) US3918535A (ja)
JP (1) JPS5027171A (ja)
AT (1) AT332838B (ja)
CA (1) CA1012959A (ja)
DE (1) DE2423902C3 (ja)
FI (1) FI57547C (ja)
FR (1) FR2230468B1 (ja)
GB (1) GB1444862A (ja)
IT (1) IT1011495B (ja)
SE (1) SE391666B (ja)
ZA (1) ZA743299B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141671A (en) * 1977-04-20 1979-02-27 Tarsoly Balazs K Tool gas turbine motor
US4161990A (en) * 1976-11-04 1979-07-24 Atlas Copco Aktiebolag Rock drilling apparatus
US20040094315A1 (en) * 2002-11-18 2004-05-20 Chen, Hsiu-Ju Shock-absorbing structure for pneumatic tool
DE10021355B4 (de) * 2000-05-02 2005-04-28 Hilti Ag Schlagendes Elektrohandwerkzeuggerät mit schwingungsentkoppelten Baugruppen
US20060144605A1 (en) * 2003-11-06 2006-07-06 Hsiu-Ju Chen Shock-absorbing structure for pneumatic tool
US20060144604A1 (en) * 2004-12-23 2006-07-06 Martin Soika Power tool housing
US20070215370A1 (en) * 2006-03-01 2007-09-20 Basso Industry Corp. Shock-Absorbing Structure for Pneumatic Tool
CN102536130A (zh) * 2012-02-10 2012-07-04 江苏省无锡探矿机械总厂有限公司 钻机旋转式接头装置
CN102536129A (zh) * 2011-12-30 2012-07-04 中国地质大学（武汉） 一种用于智能柔管钻探装置的快速接头
US20130192861A1 (en) * 2010-04-20 2013-08-01 Robert Bosch Gmbh Hand power tool device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE398066B (sv) * 1975-03-18 1977-12-05 Atlas Copco Ab Sett och anordning vid slaende bearbetning for dempning av rekylen fran ett arbetsverktyg
SE392830B (sv) * 1975-03-18 1977-04-25 Atlas Copco Ab Anordning vid bergborrmaskiner for dempning av rekylen fran ett till maskinen anslutet arbetsverktyg
DE3405922A1 (de) * 1984-02-18 1985-08-22 Robert Bosch Gmbh, 7000 Stuttgart Handwerkzeugmaschine, insbesondere bohr- oder schlaghammer
DE19837754A1 (de) 1998-08-20 2000-03-02 Wafios Maschinen Wagner Hochgeschwindigkeits-Schlagschere zum Abscheren von Stangen- und Drahtabschnitten
CN101787852B (zh) * 2010-02-04 2012-10-31 冯静 以锤击作为动力的冲击钻及其使用方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292867A (en) * 1940-01-15 1942-08-11 Gas Tool Patents Corp Drilling apparatus
US2609813A (en) * 1946-08-15 1952-09-09 Chicago Pneumatic Tool Co Gas hammer
US2638749A (en) * 1951-01-19 1953-05-19 Henry J Clay Electropneumatic hammering device
US3086501A (en) * 1959-06-24 1963-04-23 Henry E Kyburg Fluid-operated hammer
US3114421A (en) * 1960-04-04 1963-12-17 Skil Corp Pneumatic system for a rotary hammer device
US3666024A (en) * 1970-07-29 1972-05-30 Richard W Beaumont Rock drill

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292867A (en) * 1940-01-15 1942-08-11 Gas Tool Patents Corp Drilling apparatus
US2609813A (en) * 1946-08-15 1952-09-09 Chicago Pneumatic Tool Co Gas hammer
US2638749A (en) * 1951-01-19 1953-05-19 Henry J Clay Electropneumatic hammering device
US3086501A (en) * 1959-06-24 1963-04-23 Henry E Kyburg Fluid-operated hammer
US3114421A (en) * 1960-04-04 1963-12-17 Skil Corp Pneumatic system for a rotary hammer device
US3666024A (en) * 1970-07-29 1972-05-30 Richard W Beaumont Rock drill

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161990A (en) * 1976-11-04 1979-07-24 Atlas Copco Aktiebolag Rock drilling apparatus
US4141671A (en) * 1977-04-20 1979-02-27 Tarsoly Balazs K Tool gas turbine motor
DE10021355B4 (de) * 2000-05-02 2005-04-28 Hilti Ag Schlagendes Elektrohandwerkzeuggerät mit schwingungsentkoppelten Baugruppen
US20040094315A1 (en) * 2002-11-18 2004-05-20 Chen, Hsiu-Ju Shock-absorbing structure for pneumatic tool
US20060144605A1 (en) * 2003-11-06 2006-07-06 Hsiu-Ju Chen Shock-absorbing structure for pneumatic tool
US20060144604A1 (en) * 2004-12-23 2006-07-06 Martin Soika Power tool housing
US8430182B2 (en) 2004-12-23 2013-04-30 Black & Decker Inc. Power tool housing
US20070215370A1 (en) * 2006-03-01 2007-09-20 Basso Industry Corp. Shock-Absorbing Structure for Pneumatic Tool
US20130192861A1 (en) * 2010-04-20 2013-08-01 Robert Bosch Gmbh Hand power tool device
US9440345B2 (en) * 2010-04-20 2016-09-13 Robert Bosch Gmbh Hand power tool device
CN102536129A (zh) * 2011-12-30 2012-07-04 中国地质大学（武汉） 一种用于智能柔管钻探装置的快速接头
CN102536130A (zh) * 2012-02-10 2012-07-04 江苏省无锡探矿机械总厂有限公司 钻机旋转式接头装置

Also Published As

Publication number Publication date
FI57547C (fi) 1980-09-10
ATA424574A (de) 1976-02-15
DE2423902C3 (de) 1978-06-22
DE2423902B2 (de) 1976-07-29
AT332838B (de) 1976-10-25
FI57547B (fi) 1980-05-30
GB1444862A (en) 1976-08-04
FR2230468B1 (ja) 1978-05-26
CA1012959A (en) 1977-06-28
SE391666B (sv) 1977-02-28
FI150774A (ja) 1974-11-24
DE2423902A1 (de) 1974-12-12
JPS5027171A (ja) 1975-03-20
ZA743299B (en) 1975-08-27
IT1011495B (it) 1977-01-20
FR2230468A1 (ja) 1974-12-20

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