US3926266A - Electropneumatic hammer - Google Patents

Electropneumatic hammer Download PDF

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Publication number
US3926266A
US3926266A US493660A US49366074A US3926266A US 3926266 A US3926266 A US 3926266A US 493660 A US493660 A US 493660A US 49366074 A US49366074 A US 49366074A US 3926266 A US3926266 A US 3926266A
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US
United States
Prior art keywords
sleeve member
driving piston
hammer
tool
piston
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
US493660A
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English (en)
Inventor
Roger Dorgnon
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.)
Societe de Prospection et dInventions Techniques SPIT SAS
Illinois Tool Works Inc
Original Assignee
Societe de Prospection et dInventions Techniques SPIT SAS
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 Societe de Prospection et dInventions Techniques SPIT SAS filed Critical Societe de Prospection et dInventions Techniques SPIT SAS
Application granted granted Critical
Publication of US3926266A publication Critical patent/US3926266A/en
Assigned to ILLINOIS TOOL WORKS INC, A CORP. OF DE. reassignment ILLINOIS TOOL WORKS INC, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OLIN CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18024—Rotary to reciprocating and rotary

Definitions

  • ABSTRACT An electropneumatic hammer of the type in which a driving piston is caused to undergo a reciprocating movement of translation under the action of an electric motor and a striking piston is driven by the driving piston, with the striking piston and the driving piston being mounted in a sleeve, the striking piston being disposed in such a manner as to impart a strike to a tool mounted in a tool-holder spindle, the driving piston being adapted to transmit, in the course of its reciprocating movements of translation, an alternating movement of rotation to the sleeve, the sleeve being connected to rotate with the tool through unidirectional connecting means, and means for imparting to the driving piston, in the course of its reciprocating movements of translation, an alternating movement of rotation about an axis parallel to its direction of translation.
  • the present invention relates to an electropneumatic hammer of the type comprising a driving piston caused to reciprocate under the action of an electric motor, and a striking piston driven by the driving piston through resiliently yieldable means, such as an air cushion, the striking piston and the driving piston moving in a common cylindrical sleeve, with the striking piston being disposed in such manner as to strike the rear part of a tool mounted in a tool-holder spindle.
  • Such hammers are employed, in particular, for making holes in hard walls so as to insert therein sealing or bedding means.
  • PRIOR ART Hammers are known for this purpose in which a gear system transmits from the driving means, a movement of rotation directly to the tool or to the cylindrical member with which the tool is connected to rotate.
  • gear transmissions which are noisy and consume energy.
  • these known devices do not allow the extent and the speed of rotation of the tool to be adjusted, which may be very useful for adapting the hammer to materials of various natures.
  • Hammers are also known in which the driving piston is arranged to transmit, in the course of its reciprocating movements of translation, an alternating movement of rotation to the cylindrical sleeve, with the latter being connected to rotate with the striking tool, through unidirectional connecting means.
  • the sleeve has a helical slot with which an extension integral with the driving piston cooperates.
  • An object of the present invention is to overcome these drawbacks of known hammers by the use of means for adjusting the speed of rotation of the tool.
  • means are provided for imparting to the driving piston, in the course of its reciprocating movements of translation, an alternating movement of rotation about an axis parallel to its direction of translation, which movement of rotation is preferably adjustable in amplitude.
  • the driving piston is reciprocated by an electric motor through a ball joint and the driving piston is provided with a second extension which co-operates with a slideway fixed to the housing of the hammer and inclinable about a pin integral with the housing and perpendicular to the axis of the sleeve.
  • FIG. 1 is a longitudinal sectional view of one embodiment of a pneumatic hammer according to the invention
  • FIG. 2 is a sectional view taken on line II-II of FIG. 1, the view looking in the direction of the arrows
  • FIG. 3 is a sectional view taken on line III-III of FIG. 2, the view looking in the direction of the arrows.
  • the hammer comprises a driving piston l movable in a cylindrical sleeve member 2, in which is also movable a striking piston 3, which is separated from the driving piston 1 by an air cushion 4.
  • An electric motor 5 rotates through a torque limiter 6, a disc 7 which drives an eccentric arm 8, connected by a ball joint 9 to the rear of the driving piston 1.
  • the sleeve member 2 is mounted on two bearings 10 and 1 l integral with a housing 12 of the hammer.
  • a tool holder spindle 13 is connected to the cylindrical sleeve member 2 by a free-wheel system or pawl system 14 so that it is connected to rotate with the sleeve member in only one direction.
  • the driving piston l carries a radial stud 15 which co-operates with a helical slot 16 provided in the sleeve member 2.
  • the driving piston 1 also carries a radial pin 17 having a free end portion which extends through the sleeve member 2 and carries a roller 18 co-operating with a rectilinear slideway 19.
  • the slideway 19 is mounted on the housing 12 to rotate about a shaft connected to this housing, and the inclination of the slideway 19 with respect to the axis of the cylindrical sleeve member 2 being is adjustable by a control knob 20 (FIG.2
  • the hammer further is provided with a grip 21 integral with the housing 12 and having a button 22 for actuating the motor 5 which is supplied with current through a cable 23.
  • the driving piston 1 When the motor 5 is supplied with current, the driving piston 1 is caused to undergo a reciprocating movement of translation in the sleeve member 2 through the eccentric arm 8 and the ball joint 9. It causes the striking piston 3 to move in translation through the air cushion 4.
  • the co-operation of the stud 15 with the slot 16 causes, in the course of the reciprocating movements of translation of the driving piston l, the sleeve member 2 to undergo an alternating movement of rotation about its axis of revolution, with this rotation being transmitted to the tool-holder spindle l3, and consequently to the striking tool (not shown), only in respect of one direction of rotation, preferably the direction corresponding to the rearward return movement of the driving piston l.
  • the co-operation of the roller 18 with the slideway 19 causes, if the slideway is not parallel to the axis of the sleeve member 2, the driving piston l to undergo an alternating movement of rotation about its axis when the driving piston reciprocates in the sleeve member 2.
  • This rotation of the driving piston 1, which is allowed by the ball joint 9, is added to or substracted from, depending on its direction of rotation, the rotation imparted by the driving piston 1 to the sleeve member 2 and consequently to the tool.
  • the extent to which the tool rotates, and therefore its speed, are adjustable over a wide range.
  • An electropneumatic hammer of the type including a rotatable sleeve member having an axis, a driving piston mounted in said sleeve member for reciprocating movement along the axis of the sleeve member, an electric motor for effecting the reciprocating movement, a tool-holder spindle, and a striking piston mounted in said sleeve member and driven by said driving piston, the striking piston being disposed in such a manner as to impart a strike to a tool mounted in the tool-holder spindle, the improvement comprising:
  • the hammer as claimed in claim 1 further including means for adjusting the amount of reciprocal rotational movement of said driving piston so that the amount of reciprocal rotation of said sleeve member can be varied.
  • the hammer as claimed in claim 4 further including means for mounting said slideway so that it is inclinable about an axis perpendicular to the axis of said sleeve member.
  • the hammer as claimed in claim 5 further including a ball joint connection between said driving piston and said electric motor.
  • the hammer as claimed in claim 6 further including a torque limiter interposed between the electric motor and the ball joint connection.
  • the hammer as claimed in claim 4 further including a free-wheel mechanism connecting said sleeve member and the tool-holder spindle.
  • the hammer as claimed in claim 4 further including a pawl system connecting said sleeve member and the tool-holder spindle.
  • the hammer as claimed in claim 4 including a housing, the sleeve member extending axially of and being mounted in the housing, and the slideway being mounted in the housing.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
US493660A 1973-08-10 1974-07-30 Electropneumatic hammer Expired - Lifetime US3926266A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7329404A FR2240086B1 (de) 1973-08-10 1973-08-10

Publications (1)

Publication Number Publication Date
US3926266A true US3926266A (en) 1975-12-16

Family

ID=9123898

Family Applications (1)

Application Number Title Priority Date Filing Date
US493660A Expired - Lifetime US3926266A (en) 1973-08-10 1974-07-30 Electropneumatic hammer

Country Status (9)

Country Link
US (1) US3926266A (de)
JP (1) JPS547482B2 (de)
AU (1) AU474976B2 (de)
BR (1) BR7406637D0 (de)
CA (1) CA1023222A (de)
DE (1) DE2437980A1 (de)
ES (1) ES428988A1 (de)
FR (1) FR2240086B1 (de)
GB (1) GB1442104A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276941A (en) * 1978-10-10 1981-07-07 Robert Bosch Gmbh Hand-held power tool
US4646852A (en) * 1985-02-14 1987-03-03 Senco Products, Inc. Pneumatic mallet
US5050687A (en) * 1988-09-23 1991-09-24 Prokhorov Ivan A Compression-vacuum action percussive machine
US5871059A (en) * 1995-02-28 1999-02-16 Makita Corporation Mechanism for preventing idling strikes in power-driven striking tools
US6116352A (en) * 1998-03-10 2000-09-12 Robert Bosch Gmbh Drilling and/or percussion power tool
US6127751A (en) * 1998-09-02 2000-10-03 Hilti Aktiengesellschaft Electric tool
US6325157B1 (en) * 1998-11-19 2001-12-04 Makita Corporation Striking tool with an improved cooling mechanism
US6488195B2 (en) * 1998-09-18 2002-12-03 Stanley Fastening Systems, L.P. Multi-stroke fastening device
CN101347814B (zh) * 2008-09-02 2010-06-02 夏德仕 液压电液锤
US11170598B2 (en) 2019-09-17 2021-11-09 Whirlpool Corporation Token collection assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2605998C3 (de) * 1976-02-14 1981-12-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Bohrhammer mit in einem Zylinder untergebrachten Antriebs- und Schlagelementen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275088A (en) * 1963-03-15 1966-09-27 Wacker Hermann Reversing means for percussion hammers
US3850255A (en) * 1969-08-04 1974-11-26 Rockwell International Corp Power driven hammers or the like

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275088A (en) * 1963-03-15 1966-09-27 Wacker Hermann Reversing means for percussion hammers
US3850255A (en) * 1969-08-04 1974-11-26 Rockwell International Corp Power driven hammers or the like

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276941A (en) * 1978-10-10 1981-07-07 Robert Bosch Gmbh Hand-held power tool
US4646852A (en) * 1985-02-14 1987-03-03 Senco Products, Inc. Pneumatic mallet
US5050687A (en) * 1988-09-23 1991-09-24 Prokhorov Ivan A Compression-vacuum action percussive machine
US5871059A (en) * 1995-02-28 1999-02-16 Makita Corporation Mechanism for preventing idling strikes in power-driven striking tools
US6116352A (en) * 1998-03-10 2000-09-12 Robert Bosch Gmbh Drilling and/or percussion power tool
US6127751A (en) * 1998-09-02 2000-10-03 Hilti Aktiengesellschaft Electric tool
US6488195B2 (en) * 1998-09-18 2002-12-03 Stanley Fastening Systems, L.P. Multi-stroke fastening device
US6325157B1 (en) * 1998-11-19 2001-12-04 Makita Corporation Striking tool with an improved cooling mechanism
CN101347814B (zh) * 2008-09-02 2010-06-02 夏德仕 液压电液锤
US11170598B2 (en) 2019-09-17 2021-11-09 Whirlpool Corporation Token collection assembly
US11935371B2 (en) 2019-09-17 2024-03-19 Whirlpool Corporation Token collection assembly

Also Published As

Publication number Publication date
CA1023222A (en) 1977-12-27
AU7199074A (en) 1976-02-05
FR2240086A1 (de) 1975-03-07
JPS547482B2 (de) 1979-04-07
FR2240086B1 (de) 1977-05-27
JPS5072260A (de) 1975-06-14
BR7406637D0 (pt) 1975-09-09
DE2437980A1 (de) 1975-02-20
ES428988A1 (es) 1976-09-01
GB1442104A (en) 1976-07-07
AU474976B2 (en) 1976-08-05

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ILLINOIS TOOL WORKS INC, A CORP. OF DE.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:OLIN CORPORATION;REEL/FRAME:004511/0377

Effective date: 19860131