US3924691A - Combustion engine driven hammer machines - Google Patents

Combustion engine driven hammer machines Download PDF

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Publication number
US3924691A
US3924691A US368081A US36808173A US3924691A US 3924691 A US3924691 A US 3924691A US 368081 A US368081 A US 368081A US 36808173 A US36808173 A US 36808173A US 3924691 A US3924691 A US 3924691A
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US
United States
Prior art keywords
rotation
throttle
servomotor
drill
combustion engine
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
US368081A
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English (en)
Inventor
Kurt Osten Brannstrom
Levi Johannes Karlfors
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
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Filing date
Publication date
Application filed by Atlas Copco AB filed Critical Atlas Copco AB
Publication of USB368081I5 publication Critical patent/USB368081I5/en
Application granted granted Critical
Publication of US3924691A publication Critical patent/US3924691A/en
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
    • 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
    • E21B1/00—Percussion drilling
    • E21B1/12—Percussion drilling with a reciprocating impulse member
    • E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
    • E21B1/30—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure
    • E21B1/32—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses
    • E21B1/34—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses the impulse member being a piston of an internal-combustion engine

Definitions

  • FIG. 1 shows a schematized rock-drilling machine partly in section.
  • FIG. 2 shows, on a larger scale, a clutch unit incorporated in the machine partly in section.
  • FIG. 3 shows the clutch unit in section according to the line AA in FIG. 2.
  • the machine shown in FIG. 1 is provided with a machine housing 1 which, for the sake of simplicity, is shown as made in one piece.
  • the machine comprises a combustion engine 5 with a spark-plug 24 and an engine piston 25.
  • the engine piston 25 drives via a connecting rod 26 a crankshaft 2.
  • the crankshaft 2 drives via a connecting rod 27 a compressor piston 3.
  • Through the inlet conduit 29 the compression chamber 30 is supplied with air, which is compressed by the compressor piston 3 for driving the hammer piston 28 towards a tool 8, which is inserted into the drill-sleeve 7.
  • the machine is provided with two handles 20, which are elastically connected to the machine housing 1 as shown by the lines of dashes 23 for attenuating vibrations caused by gas-pressure forces in the machine.
  • a device 6 for transferring rotation from the crank shaft 2 to the drill-sleeve 7 comprises a clutch unit which is closer described below, and a therefrom outgoing axle 58 and a toothed wheel 17 which cooperates with teeth 18 on the drill-sleeve 7.
  • the drill-sleeve 7 is provided with projections 19 for cooperation with a dog 35 which is loaded by a spring 34.
  • a cylindrical part 32 is rotatably journalled in the machine housing 1 and connected to a function selector 31.
  • the cylindrical part 32 is provided with an eccentric terminal 33 for lifting the dog 35 out of engagement with the projections 19 at drilling.
  • air is conducted through channels 40, 41 to a chamber 42 for flushing air through a central, not shown, channel in the tool 8.
  • From the compression chamber air is also conducted via a checkvalv 38'and channels 37 39 toa conduit 11 for actuating a servo-motor 9 for engaging the drill-rotation.
  • the slide-valve 36 is turned so, when the machine is switched over for breakingby meansof the function se lector 31, that the air supply to the conduit 11 and the chamber 42 is broken.
  • the eccentric terminal 33 is furthermore removed so that the spring 34 pushes the dog into engagement withthe projections 19 on the drillsleeve 7 in order tobar the tool-rotation.
  • the combustion engine 5 works at idling speed when the throttle 4 is in the position shown in FIG. 1.
  • the airflow through the conduit 11 is conducted via a venting conduit '22 and a valve 12 to the atmosphere. This means that the drill-rotation is disengaged as shown below.
  • the number of revolutions of the combustion engine 5 is increased in a well-known manner.
  • the spring 21 presses the valve member 12 downwards so that the airflow through the venting conduit 22 is blocked.
  • the airflow is through this conducted to the servo-motor 9 for engaging the drill-rotation.
  • FIG. 2 the clutch unit 10 and the servo-motor 9 are shown on a larger scale whereby a part of the device has been broken away according to the line BB in order to show the crankshaft 2 and the worm 65.
  • the clutch unit 10 and the servo-motor 9 are mounted in a housing which consists of a mantle 68, a lower part 67, and a lid 60. This housing is a part of the machine housing 1.
  • the worm 65 of the crankshaft 2 cooperates with the worm wheel 64.
  • the worm wheel 64, a driving part 51, and a distance sleeve 69 are by means of a sleeve 62 and a nut 66 clamped to a ball bearing 63, which is axially fixed in the mantle 68.
  • the driving part 51 is provided with three recesses 52 each of which accommodates a roller 53.
  • the rollers 53 are pressed by a spring means 54 against a cam 55 on a driven part 56, which constitutes a first coupling part.
  • the driven part 56 is provided with clutch jaws 70 for cooperation with clutch jaws 71 on a second coupling part 57.
  • the second coupling part 57 is provided with splines 72 for C0- operation with recesses 73 in the outgoing axle 58.
  • the second coupling part 57 is displacable by means of an actuator 13 against the action of a spring 16.
  • the actuator 13 is fluidtightly connected to a diaphragm 14 which is fluidtightly clamped between the mantle 68 and the lid 60.
  • compressed air is conducted from the conduit 11 via the channel 61 to the chamber 15 through which the actuator 13 displaces the second coupling part 57 so that the clutch jaws 70, 71 are brought into cooperation. Through this the rotation of the crankshaft 2 is transferred to the outgoing axle 58.
  • a device relating to combustion engine driven hammer machines comprising a machine housing, a crankshaft which is arranged in the machine housing and connected to a compressor piston and driven by a combustion engine, a throttle controlling said engine, a device comprising a servomotor, which is controlled in dependence on the position of the throttle, for transferring rotation from the crankshaft to a drill-sleeve for rotating a tool which is inserted into the drill-sleeve, and a clutch unit which is actuated by the servomotor for engagement or disengagement of the rotation.
  • a device in which a conduit is arranged for transferring a fluid-pressure, created by the compressor piston, to the servomotor for engaging the rotation, and connected to a valve, which is actuated by the throttle and connects the conduit to a low pressure when the throttle is moved to a certain part of its adjustment range, through which the rotation is disengaged.
  • the servomotor comprises an actuator which is fluidtightly connected to a diaphragm, which is fluidtightly connected to the machine housing in order to form a chamber together therewith, to which the fluid-pressure, created by the compressor piston, is conducted for displacing the actuator against the action of a spring for engagement of the rotation.
  • the clutch unit comprises a driving part provided with a number of recesses each accommodating a roller, one or more radially acting spring means for pressing the rollers against a cam on a driven part which is made as one coupling part of the clutch unit, the other coupling part of which is coaxial with and essentially surrounded by the driven part and axially displaceably arranged partly in relation to this and partly on an outgoing axle for moment-transferring cooperation with the latter.
  • a device in which a function selector comprising an essentially cylindrical part, which is guided in the machine housing and provided with, an eccentric first terminal for .actuating a springloaded dog for barring the drill-sleeve against rotation when the function selector is in a certain adjustment position, and a second-terminal which is made as a slide-valve for blocking the transferring of fluid-pressure, created by the compressor piston, to the servomotor when the function selector is in said adjustment position, through which the rotation remains disengaged independent of the adjustment of the throttle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Drilling And Boring (AREA)
US368081A 1972-06-30 1973-06-08 Combustion engine driven hammer machines Expired - Lifetime US3924691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7208601A SE374163B (xx) 1972-06-30 1972-06-30

Publications (2)

Publication Number Publication Date
USB368081I5 USB368081I5 (xx) 1975-01-28
US3924691A true US3924691A (en) 1975-12-09

Family

ID=20274536

Family Applications (1)

Application Number Title Priority Date Filing Date
US368081A Expired - Lifetime US3924691A (en) 1972-06-30 1973-06-08 Combustion engine driven hammer machines

Country Status (7)

Country Link
US (1) US3924691A (xx)
JP (1) JPS5613594B2 (xx)
CA (1) CA991036A (xx)
DE (1) DE2333584C3 (xx)
GB (1) GB1383720A (xx)
SE (1) SE374163B (xx)
SU (1) SU652908A3 (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4609053A (en) * 1982-09-22 1986-09-02 Atlas Copco Aktiebolag Hammer tool
US4641714A (en) * 1983-11-18 1987-02-10 Filippo Ferioli Multiuse portable equipment for driving rotating tools, rotating percussion tools and percussion tools
US4766963A (en) * 1982-09-22 1988-08-30 Institut Cerac S.A. Hand-held hammer tool
US20080190988A1 (en) * 2007-02-09 2008-08-14 Christopher Pedicini Fastener Driving Apparatus
US20150343625A1 (en) * 2013-01-18 2015-12-03 Illinois Tool Works Inc. Electropneumatic gas fastening device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5116183Y1 (xx) * 1970-07-29 1976-04-28
JPS5042715A (xx) * 1973-08-20 1975-04-18
DE2820128A1 (de) * 1978-05-09 1979-11-22 Bosch Gmbh Robert Handwerkzeugmaschine
US4305326A (en) * 1979-06-08 1981-12-15 Hughes Helicopter, Inc. Compact clutch mechanism
GB2223545B (en) * 1988-09-30 1992-11-11 Rolls Royce Plc Variable guide vane and clutch arrangement
JPH081844Y2 (ja) * 1990-02-17 1996-01-24 清水建設株式会社 コンクリート等表面のはつり機
DE19700754A1 (de) * 1997-01-11 1998-07-16 Bosch Gmbh Robert Handwerkzeugmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1938080A (en) * 1932-02-24 1933-12-05 Henry J De N Mccollum Pneumatic clutch controller with supplemental spring
US1996256A (en) * 1931-10-12 1935-04-02 Bendix Aviat Corp Clutch control mechanism
US2923280A (en) * 1957-10-22 1960-02-02 Kagitani Takeo Portable power tool
US3570608A (en) * 1968-05-08 1971-03-16 Atlas Copco Ab Hammer mechanism for percussion tools

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1196608B (de) * 1962-10-04 1965-07-15 Duss Maschf Schlaggeraet, insbesondere Bohrhammer mit aufhebbarem Rotationsantrieb
DE1193449B (de) * 1962-11-06 1965-05-26 J K Smit & Sons Internat Ltd Tragbares Gesteinsbohrgeraet
DE1948055A1 (de) * 1969-09-23 1971-04-01 Impex Essen Vertrieb Elektrisch betriebener Bohrhammer
DE1964083C3 (de) * 1969-12-22 1983-01-27 Robert Bosch Gmbh, 7000 Stuttgart Gesteinsbohrmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1996256A (en) * 1931-10-12 1935-04-02 Bendix Aviat Corp Clutch control mechanism
US1938080A (en) * 1932-02-24 1933-12-05 Henry J De N Mccollum Pneumatic clutch controller with supplemental spring
US2923280A (en) * 1957-10-22 1960-02-02 Kagitani Takeo Portable power tool
US3570608A (en) * 1968-05-08 1971-03-16 Atlas Copco Ab Hammer mechanism for percussion tools

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4609053A (en) * 1982-09-22 1986-09-02 Atlas Copco Aktiebolag Hammer tool
US4766963A (en) * 1982-09-22 1988-08-30 Institut Cerac S.A. Hand-held hammer tool
US4641714A (en) * 1983-11-18 1987-02-10 Filippo Ferioli Multiuse portable equipment for driving rotating tools, rotating percussion tools and percussion tools
US20080190988A1 (en) * 2007-02-09 2008-08-14 Christopher Pedicini Fastener Driving Apparatus
US8875969B2 (en) * 2007-02-09 2014-11-04 Tricord Solutions, Inc. Fastener driving apparatus
US20150343625A1 (en) * 2013-01-18 2015-12-03 Illinois Tool Works Inc. Electropneumatic gas fastening device

Also Published As

Publication number Publication date
DE2333584C3 (de) 1975-03-13
CA991036A (en) 1976-06-15
JPS4943805A (xx) 1974-04-25
DE2333584B2 (de) 1974-07-25
DE2333584A1 (de) 1974-01-17
SE374163B (xx) 1975-02-24
GB1383720A (en) 1974-02-12
JPS5613594B2 (xx) 1981-03-30
SU652908A3 (ru) 1979-03-15
USB368081I5 (xx) 1975-01-28

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