EP2090405A1 - Marteau à air comprimé - Google Patents

Marteau à air comprimé Download PDF

Info

Publication number
EP2090405A1
EP2090405A1 EP20090450010 EP09450010A EP2090405A1 EP 2090405 A1 EP2090405 A1 EP 2090405A1 EP 20090450010 EP20090450010 EP 20090450010 EP 09450010 A EP09450010 A EP 09450010A EP 2090405 A1 EP2090405 A1 EP 2090405A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
compressed air
holding
jackhammer
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
EP20090450010
Other languages
German (de)
English (en)
Other versions
EP2090405B1 (fr
Inventor
Johann Pfeffer
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.)
BBG Baugeraete GmbH
Original Assignee
BBG Baugeraete GmbH
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 BBG Baugeraete GmbH filed Critical BBG Baugeraete GmbH
Priority to SI200931299T priority Critical patent/SI2090405T1/sl
Publication of EP2090405A1 publication Critical patent/EP2090405A1/fr
Application granted granted Critical
Publication of EP2090405B1 publication Critical patent/EP2090405B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • 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
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/69—Foamed polymers, e.g. polyurethane foam

Definitions

  • the invention relates to a pneumatic hammer, in particular a hand-held pneumatic hammer, consisting of a holding or gripping part, a controllable compressed air inlet valve, a cylinder with a percussion piston, a valve body or control body for compressed air path control from a pressure ring space for a stroke or stroke a return stroke of the piston and a silencer with exhaust air discharge.
  • a pneumatic hammer in particular a hand-held pneumatic hammer, consisting of a holding or gripping part, a controllable compressed air inlet valve, a cylinder with a percussion piston, a valve body or control body for compressed air path control from a pressure ring space for a stroke or stroke a return stroke of the piston and a silencer with exhaust air discharge.
  • the invention For pneumatic tools, there are a variety of controls for the regular reciprocation of the percussion piston, the invention relates to hammers with air intake control via a valve body and an outlet through the stroke of the working piston.
  • the opening and closing of the air inlet is done by a simple valve body, the air outlet is released controlled by the percussion piston itself.
  • An air intake control can alternatively be done by flutter control, full valve control and pipe slide control.
  • the invention is based on the use of a flutter control, in which a valve body between two seats is tossed back and forth while alternately applied to one or the other side of the cylinder with compressed air and terminates the opposite side.
  • a flutter control can be performed with a ball, flap, disc or plate and annular valve body, wherein a serving for the return stroke pressure line is usually designed as a bore in the cylinder or in the cylinder wall.
  • the invention aims to avoid the disadvantages of the previous embodiments and has set itself the goal of creating a new concept of a pneumatic hammer, by means of which at the same time a simple and safe flutter control with favorable compressed air, a low weight of the hammer and high efficiency and ease of service are present.
  • valve body or control body for opening and closing the air inlets for pressurizing the piston with compressed air in the cylinder is designed as a tubular ring and the respective air inlets substantially are arranged perpendicular to the axis of movement of the piston in a direction opposite one another in the cylinder and in the holding or gripping body.
  • control body for opening and closing the air inlets in cooperation with a structural design of the compressed air guide.
  • a control body designed as a tubular ring, is movably guided on the face side between cylinder and grip body in a valve space and has connecting means in the guide area.
  • a supply line into a pipe system in the handle body, which ultimately serves for
  • a structurally particularly favorable form with high reliability and functional stability of the control body is present when the tubular valve body or control body at least on one of the end faces in Rohraxetti Recesses or recesses as a connecting means to the pressure ring space.
  • the cylinder or rather the cylinder wall thickness, has to be designed only according to the mechanical stress, whereby a small wall thickness and thus a weight reduction of the hammer in a favorable manner compared to the prior art is possible.
  • the muffler for the exhaust air outlet with the holding or gripping body and the cylinder is in operative connection and integrated has a Druck Kunststoffleitsch for acting on the piston for the return stroke.
  • a Druck Kunststoffleitsch for acting on the piston for the return stroke.
  • the silencer is formed of engineering polyurethane (TPU), and the connections to the holding or gripping body and to the cylinder and the connection of the Druck Kunststoffleitffens are designed as connectors, the soundproofing can further intensified and greatly facilitates installation and / or disassembly and be carried out with high economy.
  • TPU engineering polyurethane
  • Fig. 1 shows a pneumatic hammer A according to the invention with resilient in the direction of impact handles for vibration reduction.
  • a percussion piston 1 is positioned in a cylinder 2, which cylinder 2 has a substantially axsymmetric, small wall thickness without axial bore.
  • a cylinder 2 made of steel is economical in such an embodiment, for example, by turning and by radial drilling, can be produced and may have low weight.
  • a handle body 3 which has a controllable compressed air inlet valve, optionally a switchable by means of actuating means on a handle ball valve and a compressed air supply to a pressure chamber 32, formed by handle body 3 and cylinder 2.
  • an air inlet 21 is formed at the end in the region of the starting position for the stroke of the piston 1 by a radial bore, which or which can be closed by a tubular valve body 4.
  • a radial bore which or which can be closed by a tubular valve body 4.
  • the composite part 5 is positioned einragend in a PTU silencer 6, in which a compressed air line to the inlets for a return stroke in the cylinder 2 is continued.
  • the assembly of the parts takes place essentially in a first step by inserting a cylinder 2 with inserted valve body 4 and piston 1 in a preassembled handle part 3, which is provided with a composite part 5.
  • securing means must be used, as well as a silencer 6 postponed and brought to a snap.
  • a pneumatic hammer according to the invention can be overcome by locking means or solution of securing means in a simple way the PTU silencer 6 removed from the handle body 3 with a composite part 5 and cylinder 2 and handle body 3 are slidingly separated, so that the valve body and the Um Kunststoffponenten 21,31 exposed.
  • Fig. 2 is a section AA of a pneumatic hammer A according to Fig. 1 shown in principle perpendicular to the hammer length in the area of a valve control.
  • a valve body 4 In the end region forms a recess in a cylinder 2 a clearance or valve space between the cylinder 2 and a handle body 3, in which valve chamber, a valve body 4 is arranged radially displaceable.
  • valve chamber area In the radial direction with the same axis 3 holes are provided in the valve chamber area as an air inlet 21 in the cylinder 2 and as an air inlet 31 in the handle body.
  • FIG. 3 shows in an axially guided section in the region of the air inlets 21,31, immediately below the valve chamber and connected to this a pressure chamber 32 formed by radial recesses of the cylinder 2 and the handle body 3.
  • a tubular valve body 4 has in the tube alignment recesses in several places, so that in spite of stim beginnerem concern to a radial partial surface of the cylinder 2 in each case a connecting means 41 is given to the pressure chamber 32, which pressure chamber 32 with a controllable compressed air supply ( Fig. 1 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP09450010.5A 2008-02-12 2009-01-14 Marteau à air comprimé Active EP2090405B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200931299T SI2090405T1 (sl) 2008-02-12 2009-01-14 Pnevmatsko kladivo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT2292008A AT506424B1 (de) 2008-02-12 2008-02-12 Drucklufthammer

Publications (2)

Publication Number Publication Date
EP2090405A1 true EP2090405A1 (fr) 2009-08-19
EP2090405B1 EP2090405B1 (fr) 2015-08-05

Family

ID=40551517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09450010.5A Active EP2090405B1 (fr) 2008-02-12 2009-01-14 Marteau à air comprimé

Country Status (5)

Country Link
EP (1) EP2090405B1 (fr)
AT (1) AT506424B1 (fr)
ES (1) ES2548773T3 (fr)
PT (1) PT2090405E (fr)
SI (1) SI2090405T1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1770676A (en) * 1928-09-07 1930-07-15 Ingersoll Rand Co Valve mechanism for rock drills
US1931042A (en) * 1931-01-12 1933-10-17 Chicago Pneumatic Tool Co Fluid pressure hammer
DE2730567A1 (de) * 1976-07-07 1978-01-12 Inst Gornogo Dela Sibirskogo O Schlagwerk
EP0009229A1 (fr) * 1978-09-18 1980-04-02 Samuel David Gunning Marteaux pneumatiques
US4303131A (en) * 1980-02-27 1981-12-01 Compair Construction And Mining Ltd. Compressed-gas-operated reciprocating piston devices
US4327807A (en) * 1978-09-19 1982-05-04 Maco-Meudon Percussion tool casing
WO1993025831A1 (fr) * 1992-06-15 1993-12-23 Cummins Engine Company, Inc. Injecteur de carburant equipe d'une soupape limitatrice de pression

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1770676A (en) * 1928-09-07 1930-07-15 Ingersoll Rand Co Valve mechanism for rock drills
US1931042A (en) * 1931-01-12 1933-10-17 Chicago Pneumatic Tool Co Fluid pressure hammer
DE2730567A1 (de) * 1976-07-07 1978-01-12 Inst Gornogo Dela Sibirskogo O Schlagwerk
EP0009229A1 (fr) * 1978-09-18 1980-04-02 Samuel David Gunning Marteaux pneumatiques
US4327807A (en) * 1978-09-19 1982-05-04 Maco-Meudon Percussion tool casing
US4303131A (en) * 1980-02-27 1981-12-01 Compair Construction And Mining Ltd. Compressed-gas-operated reciprocating piston devices
WO1993025831A1 (fr) * 1992-06-15 1993-12-23 Cummins Engine Company, Inc. Injecteur de carburant equipe d'une soupape limitatrice de pression

Also Published As

Publication number Publication date
SI2090405T1 (sl) 2015-12-31
ES2548773T3 (es) 2015-10-20
PT2090405E (pt) 2015-11-18
AT506424B1 (de) 2010-09-15
AT506424A1 (de) 2009-09-15
EP2090405B1 (fr) 2015-08-05

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