EP0152376A1 - Schlaggerät - Google Patents

Schlaggerät Download PDF

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Publication number
EP0152376A1
EP0152376A1 EP85810037A EP85810037A EP0152376A1 EP 0152376 A1 EP0152376 A1 EP 0152376A1 EP 85810037 A EP85810037 A EP 85810037A EP 85810037 A EP85810037 A EP 85810037A EP 0152376 A1 EP0152376 A1 EP 0152376A1
Authority
EP
European Patent Office
Prior art keywords
casing
cylinder
anvil
percussion
tool
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
EP85810037A
Other languages
English (en)
French (fr)
Other versions
EP0152376B1 (de
Inventor
Paul Dummermuth
Jean-Pierre Budlinger
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.)
Von Arx AG
Original Assignee
Von Arx AG
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 Von Arx AG filed Critical Von Arx AG
Priority to AT85810037T priority Critical patent/ATE35101T1/de
Publication of EP0152376A1 publication Critical patent/EP0152376A1/de
Application granted granted Critical
Publication of EP0152376B1 publication Critical patent/EP0152376B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/04—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
    • 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • 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
    • B25D17/11—Arrangements of noise-damping means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/275—Tools having at least two similar components
    • B25D2250/285—Tools having three or more similar components, e.g. three motors
    • B25D2250/291—Tools having three or more parallel bits, e.g. needle guns
    • 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
    • Y10T29/00—Metal working
    • Y10T29/45—Scale remover or preventor
    • Y10T29/4572—Mechanically powered operator
    • Y10T29/4578—Tack or needle type

Definitions

  • the present invention relates to a percussion device corrlois a housing elongated in the front end of which a metal needle bundle axially protrusion, a door - needles longitudinally slidably mounted within said housing, a spring for resiliently pressing this needle holder against an anvil, a cylinder mounted longitudinally sliding inside said casing and the front end of which serves as a rear stop for this anvil and is open to allow axially a free piston mounted in this cylinder and jpuant the role percussion member, motor means for initiating and maintaining a series of percussion at a given frequency of said percussion member against said anvil and an elastic compression element disposed between the respective rear ends of this casing and of this cylinder.
  • Such devices are used for the stripping of surfaces and for this purpose comprise a bundle of metal needles.
  • Other devices of the same type have a chisel and are used for example to remove the weld bead which projects at the junction of two parts, to remove burrs etc. Prolonged use of these devices is annoying because of the noise and due to the vibrations of the device.
  • percussion device is a device without anvil or free piston, but with two coaxial pistons pressed against each other by two springs and spreading one of the 'other then approaching alternately under the effect of a pneumatic motor mechanism.
  • Such a device is relatively silent, but is limited to low powers and its performance with respect to the flow of compressed air consumed is quite poor. Given their low power, these devices cannot be used for work such as pickling rusty sheets or attacking concrete surfaces.
  • the object of the present invention is precisely to provide a solution which makes it possible to effectively reduce the vibrations transmitted to the casing in this type of device, while retaining in particular the convenience of the supply of lateral compressed air by the handle.
  • the subject of the present invention is a percussion device of the aforementioned type as defined by claims 1 and 2.
  • the advantage of this device lies in a considerable damping of vibrations.
  • the measures taken to increase this depreciation do not entail costly modifications to the device, or structural or operational corrections.
  • the solution object of this invention practically does not interfere with the motor mechanism and therefore does not reduce the initial useful power of the device, contrary to what has been proposed in the case of devices in which the tool is integral with a reciprocating piston.
  • the apparatus illustrated in fig. l comprises a cylinder 1, the front end of which is open and the rear end of which is closed by a plug 2 held in place by an elastic ring 3.
  • This cylinder 1 has two compartments 4 and 5.
  • a light 8 places the compartment 4 of the cylinder 1 in communication with an annular space 9 formed between the cylinder 1 and a casing 10 in which this cylinder is mounted axially sliding.
  • This annular space is sealed by two annular seals 11 arranged in the cylinder 1 on either side of this annular space 9.
  • Another light 12 passes through the wall of the casing 10 and serves to communicate the annular space 9 with a supply duct 13 passing longitudinally through a handle 14 fixed laterally to the casing 10 and giving the device the appearance of a gun.
  • This supply duct 13 is intended to be connected to a source of compressed air (not shown).
  • a lever 15 articulated around a transverse axis 16 to the handle 14 is used to control the opening and closing of a valve 17 controlling the supply duct 13.
  • the open front end of the cylinder 1 is in contact with an anvil 18 against the front face of which a tool holder 19 is pressed by a spring 20 which bears against a narrowing 10a of the diameter of the casing 10.
  • the tool holder 19 carries a bundle of needles 21 of which only one needle is shown, intended for the etching of surfaces.
  • the needles 21 are freely mounted through the tool holder 19 and have a head 2la intended to come into contact with the front face of the anvil 18 when the tool is applied against a surface to be worked.
  • the rear end of the cylinder 1 is biased by a spring 22 compressed between this cylinder and the rear end of the casing 10.
  • the diameter of the cylinder 1 is dimensioned so as to fit in this casing with sufficient clearance so that there is no contact between this cylinder and the casing.
  • the clearance is 0.2 mm over the diameter.
  • the centering of the cylinder 1 and its suspension in the casing are ensured by the seals there which therefore serve two purposes.
  • these seals have a Z-shaped section so as to make the suspension of the cylinder sufficiently elastic and to absorb as much as possible the vibrations transmitted to the casing 10.
  • FIG. 5 A partial view in very enlarged section of the detail of the elastic suspension of the cylinder 1 in the casing 10.
  • the casing and the cylinder are separated from each other, the internal surface of the casing 10 does not need to be treated by case hardening, which constitutes a saving in manufacturing cost.
  • the proposed solution lends itself particularly well to the lateral supply of compressed air which constitutes the least expensive solution.
  • the cylinder 1 and the supply duct 13 have no mechanical connection so that the cylinder cannot be subjected to stresses making an angle with the longitudinal axis of the device as this occurs with the supply axial when the supply duct is off-center.
  • the front end of the needles 21 is applied against the surface to be worked, so that their heads 2la come into contact with the front face of the anvil 18.
  • the spring 22 is more or less compressed.
  • the valve 17 controlling the supply duct 13 by depression of the lever 15 against the handle 14, the compressed air is brought into the compartment 4 of the cylinder 1.
  • the T duct 7 this air is brought between the face rear of the free piston 6 and the rear end of the compartment 4, the bottom of which is constituted by the shutter plug 2. This results in a displacement of the free piston 6 forwards in the direction of the anvil 18, against the rear face which this piston hits.
  • compartment 4 In this position, the rear part of compartment 4 is no longer in contact with the pressurized air supply, but with compartment 5 open towards the front so that the pressurized air being in the rear part from compartment 4 escapes.
  • compartment 4 constituted by an annular space formed around the small diameter front section 6a of the free piston 6 remains in contact with the source of air under pressure, the pressure rises in this annular space and brings the piston 6 back, after which the cycle begins again.
  • the presence of the spring 22 does not in any way interfere with the operation of the free piston engine mechanism.
  • This spring 22 is compressed as a function of the pressure exerted to apply the tool or tools 21 against the surface to be worked.
  • the vibrations due to the shock of the free piston 6 against the anvil 18 and that of the tools 21 against the working surface are absorbed by the springs 20 and 22 between which the seat of the mechanism is mounted in the casing 10.
  • the absence of any rigid connection between the striking mechanism and the casing 10 has the effect that these vibrations are practically not transmitted to this casing and to the handle 14, thus considerably reducing the fatigue of the user, without significantly reducing the efficiency of the device.
  • This improvement does not lead, moreover, to a noticeable increase in the cost price since it requires only an additional spring, the presence of which does not affect the cost of assembly, compensated for by the fact that the inside of the casing 10 must not be case-hardened.
  • the variant illustrated in FIG. 2 relates to a device with a single tool consisting of a chisel 23 and a percussion mechanism identical to that of FIG. l and which, therefore, will not be described.
  • the chisel 23 is directly in contact with the free piston 6.
  • the rear part of square section is slidably mounted in a guide member 24 fixed to the front end of the cylinder 1 and the chisel is held in place by a cap 25 hooked at the front end of the guide member 24 and to a flange 23a formed on this chisel 23.
  • the guide member 24 also has two openings 26 for the exhaust of air leaving the cylinder 1.
  • the front end of the spring 20 bears against a ring 27 secured to the casing 10.
  • FIG. 4 shows an apparatus whose casing 10 is surrounded over a part of its length by a tubular element 30.
  • An acoustic absorbent material such as a plastic foam 31, in particular a polyurethane foam, fills the space between these tubular elements and is in contact with inside the casing 10 thanks to openings 32.
  • This acoustic insulating casing makes it possible to dampen the parasitic vibrations which could remain in the area of the anvil 18 and of the needle holder 19. Such vibrations result from non-longitudinal components generated following the striking action of the free piston 6 on the anvil 18.
  • Such a tubular acoustic insulating element therefore compièces the action of the damping springs and the suspension of the cylinder 1, further reduces the level of residual vibrations and decreases the effect of the noise generated by the repeated shock of the free piston 6 on the anvil 18.
  • the increase in surface temperature was also measured at the fingertips after use of the device. It is 3-4 ° C for the three comparison devices and 2 ° C for the device according to the invention.
  • annular suspension seals 11 with an annular Z-shaped straight section has proved to be extremely important insofar as it makes it possible to produce an effective seal and a suspension which is sufficiently elastic to absorb vibrations. Indeed, the replacement of these seals by 0-rings with a full circular section has made it possible to note an already significant reduction in the vibration damping effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Saccharide Compounds (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP85810037A 1984-02-09 1985-02-04 Schlaggerät Expired EP0152376B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810037T ATE35101T1 (de) 1984-02-09 1985-02-04 Schlaggeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH60584A CH655682B (de) 1984-02-09 1984-02-09
CH605/84 1984-02-09

Publications (2)

Publication Number Publication Date
EP0152376A1 true EP0152376A1 (de) 1985-08-21
EP0152376B1 EP0152376B1 (de) 1988-06-15

Family

ID=4190862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810037A Expired EP0152376B1 (de) 1984-02-09 1985-02-04 Schlaggerät

Country Status (12)

Country Link
US (1) US4723610A (de)
EP (1) EP0152376B1 (de)
JP (1) JPS60180784A (de)
AT (1) ATE35101T1 (de)
AU (1) AU3853585A (de)
CA (1) CA1275601C (de)
CH (1) CH655682B (de)
DE (1) DE3563319D1 (de)
DK (1) DK55485A (de)
FI (1) FI80840C (de)
NO (1) NO159478C (de)
ZA (1) ZA85948B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006021121A1 (de) * 2004-08-26 2006-03-02 Von Arx Ag Nadelpistole

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325929A (en) * 1991-07-09 1994-07-05 Bretec Oy Hydraulic impact hammer
US5251367A (en) * 1991-08-21 1993-10-12 Equipment Development Company, Inc. Pneumatically driven descaling tools
SE469549B (sv) * 1991-11-04 1993-07-26 Atlas Copco Tools Ab Vibrationsdaempande organ foer ett handhaallet verktyg
US5259462A (en) * 1992-08-28 1993-11-09 Ingersoll-Rand Company Soft mount air distributor
US5588323A (en) * 1995-05-22 1996-12-31 U.S. Industrial Tool And Supply Hand-held rivet bucking tool using energy dissipative polymer
US5626199A (en) * 1995-07-05 1997-05-06 T.C. Service Company Pneumatic impact tool having improved vibration and noise attenuation
US5573075A (en) * 1995-07-05 1996-11-12 T.C. Service Company Pneumatic impact tool having improved vibration and noise attenuation
SE508812C2 (sv) * 1996-03-14 1998-11-09 Goeran Nilsson Tryckmediumdriven slagmekanism
US5813477A (en) * 1996-05-23 1998-09-29 Chicago Pneumatic Tool Company Vibration-reduced impact tool and vibration isolator therefor
US6622802B2 (en) 2001-03-29 2003-09-23 Intel Corporation Fastener installation tool and methods of use
US7013986B2 (en) * 2003-05-12 2006-03-21 Nitto Kohki Co., Ltd. Impact tool
JP4494042B2 (ja) * 2004-03-02 2010-06-30 株式会社テクノサカト ブレーカー
SE528469C2 (sv) * 2004-07-05 2006-11-21 Atlas Copco Constr Tools Ab Slående verktyg med en rörligt upphängd slagmekanism
SE528471C2 (sv) * 2004-07-05 2006-11-21 Atlas Copco Constr Tools Ab Vibrationsdämpat slående verktyg med tryckluftmatningsorgan
TWM296773U (en) * 2006-03-31 2006-09-01 Shuen Tai Prec Entpr Co Ltd Portable power drill with shock absorption protective sheath
US7806201B2 (en) * 2007-07-24 2010-10-05 Makita Corporation Power tool with dynamic vibration damping
US8240394B2 (en) * 2008-12-09 2012-08-14 Sp Air Kabushiki Kaisha Hammer with vibration reduction mechanism
CN102776860A (zh) * 2012-08-14 2012-11-14 韶关学院 气动冲击式破冰机
US20160271778A1 (en) * 2015-03-21 2016-09-22 Chih Kuan Hsieh Fixing Structure for Cylinder
US11628550B2 (en) 2020-02-07 2023-04-18 Storm Pneumatic Tool Co., Ltd. Vibration reducing structure of pneumatic hammer
TWI778908B (zh) * 2022-01-21 2022-09-21 大里興業股份有限公司 具有改良減振結構之氣動衝擊工具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1059349A (fr) * 1951-09-07 1954-03-24 Marteau pneumatique
FR1348165A (fr) * 1963-02-15 1964-01-04 Outil à percussion
CH379433A (de) * 1960-08-18 1964-06-30 Wirz Friedrich Pressluftwerkzeug, insbesondere Pressluft-Abbauhammer
US3680643A (en) * 1969-03-01 1972-08-01 Nitto Kohki Co Fluid actuated tool having removable coil spring biasing means
CH600993A5 (en) * 1976-06-30 1978-06-30 Arx Ag Percussion tool for cleaning surfaces
GB2114495A (en) * 1981-10-30 1983-08-24 Nitto Kohki Co Impact tool

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Publication number Priority date Publication date Assignee Title
US2392182A (en) * 1943-06-19 1946-01-01 Crane Packing Co Piston construction
US2638749A (en) * 1951-01-19 1953-05-19 Henry J Clay Electropneumatic hammering device
US2899934A (en) * 1956-01-19 1959-08-18 salengro
US3094900A (en) * 1956-12-27 1963-06-25 Fastener Corp Fastener driving apparatus
US3032998A (en) * 1961-05-05 1962-05-08 Black & Decker Mfg Co Ram catcher for piston-ram assembly
US3496840A (en) * 1968-01-29 1970-02-24 Fastener Corp Fastener driving apparatus
US3601205A (en) * 1970-04-07 1971-08-24 Ingersoll Rand Co Rock drill
CS149009B1 (de) * 1971-02-01 1973-05-24
DE3010479A1 (de) * 1980-03-19 1981-10-08 Robert Bosch Gmbh, 7000 Stuttgart Werkzeugmaschine, insbesondere handwerkzeugmaschine mit einem luftfederschlagwerk
CH654513A5 (fr) * 1983-11-04 1986-02-28 Arx Ag Appareil a percussion.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1059349A (fr) * 1951-09-07 1954-03-24 Marteau pneumatique
CH379433A (de) * 1960-08-18 1964-06-30 Wirz Friedrich Pressluftwerkzeug, insbesondere Pressluft-Abbauhammer
FR1348165A (fr) * 1963-02-15 1964-01-04 Outil à percussion
US3680643A (en) * 1969-03-01 1972-08-01 Nitto Kohki Co Fluid actuated tool having removable coil spring biasing means
CH600993A5 (en) * 1976-06-30 1978-06-30 Arx Ag Percussion tool for cleaning surfaces
GB2114495A (en) * 1981-10-30 1983-08-24 Nitto Kohki Co Impact tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006021121A1 (de) * 2004-08-26 2006-03-02 Von Arx Ag Nadelpistole
CN101052479B (zh) * 2004-08-26 2011-02-16 沃恩阿克斯公开股份有限公司 针枪

Also Published As

Publication number Publication date
FI850547A0 (fi) 1985-02-08
NO159478B (no) 1988-09-26
FI850547L (fi) 1985-08-10
FI80840B (fi) 1990-04-30
ZA85948B (en) 1985-09-25
US4723610A (en) 1988-02-09
JPS60180784A (ja) 1985-09-14
ATE35101T1 (de) 1988-07-15
NO159478C (no) 1989-01-04
CH655682B (de) 1986-05-15
NO850479L (no) 1985-08-12
DK55485A (da) 1985-08-10
EP0152376B1 (de) 1988-06-15
DK55485D0 (da) 1985-02-07
AU3853585A (en) 1985-08-15
FI80840C (fi) 1990-08-10
CA1275601C (en) 1990-10-30
DE3563319D1 (en) 1988-07-21

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