EP0837214A2 - Foreuse à percussion - Google Patents

Foreuse à percussion Download PDF

Info

Publication number
EP0837214A2
EP0837214A2 EP97117438A EP97117438A EP0837214A2 EP 0837214 A2 EP0837214 A2 EP 0837214A2 EP 97117438 A EP97117438 A EP 97117438A EP 97117438 A EP97117438 A EP 97117438A EP 0837214 A2 EP0837214 A2 EP 0837214A2
Authority
EP
European Patent Office
Prior art keywords
hammer drill
control pin
sleeve
control
drill according
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.)
Ceased
Application number
EP97117438A
Other languages
German (de)
English (en)
Other versions
EP0837214A3 (fr
Inventor
Ralf Buczeck
Hans-Philipp Walter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0837214A2 publication Critical patent/EP0837214A2/fr
Publication of EP0837214A3 publication Critical patent/EP0837214A3/fr
Ceased legal-status Critical Current

Links

Images

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
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers

Definitions

  • the present invention relates to a pneumatically driven hammer drill, especially deep hole hammer, according to the preamble of claim 1.
  • DE-U-9 202 336 describes a hammer drill of the type mentioned at the outset can also be used in difficult rock. He has for air dosing a rotatably driven tubular body and a slidable one Central passage shaft, the lower end with the tubular body Shut-off device, e.g. forms a slide that creates an air deflection space as required releases or - if necessary partially - closes.
  • Shut-off device e.g. forms a slide that creates an air deflection space as required releases or - if necessary partially - closes.
  • the neck can the shaft connected to the tubular body and a leading shaft on it Pipe head provided with a number of holes as a result of relative weak cross-sections are at risk of breakage, especially since the length of the hammer drill is included large lever arm attacks it.
  • the hammer drill is said to be large Provide long service life, even with an increased stroke frequency manage with low compressed air consumption and work relatively quietly.
  • the invention provides according Claim 1 before that between the piston-guiding cylinder liner with a Rifle attachment and the outer tube at least partially form-fitting to one Unit is firmly connected, and one above, with the outer tube an annular gap is welded along a circumferentially welded threaded sleeve is present and that the upper end of the percussion piston with the control pin cooperating shut-off forms, in particular a slide valve.
  • control pin according to claim 2 has a tubular body upwards with a perforated flange or disc head on one axial and / or radially projecting collar within the threaded sleeve and after supported at the bottom on a sleeve that delimits the annular gap on the inside.
  • claim 3 according to which the check valve is advantageous, is structurally advantageous is carried by a cover plate which is attached to the screw cap connects and passages close to the circumference as well as one protruding downwards Bund has.
  • This arrangement is extremely simple and stable; it ensures always good air supply.
  • this is supported by a convex Curving of the control pin plate head, especially with rounded transitions to the circumferential passages and / or to the inner chamber.
  • a particularly reliable construction results according to claim 5 by the Sleeve is formed hat-shaped and with a lower bounding the annular gap below Collar, flange or the like is supported on a rifle attachment on the Cylinder liner sits and on its upper part axially parallel to the outer tube Has recesses. This ensures a stable attachment still leaves room for small movements of the control pin, e.g. at operational vibrations.
  • This is further promoted by the measure of claim 6, after which between the plate head and the sleeve Sealing ring and / or between the sleeve and the sleeve top part flexible ring is arranged to compensate for a certain position and tolerance to achieve.
  • the cylinder liner and the Rifle top part are designed as finned tubes with the same profile, results there is also a large-volume channeled air duct in the lower hammer area.
  • control bush according to claim 10 has such an axial length that the circumferential recess of the Control pin and its cross holes closed. With the drill bit pressed the hammer drill therefore starts up easily; at the same time the Compression chamber vented above the percussion piston.
  • the Inner chamber of the control pin receives an insert and with one in it preferably centrally arranged channel flow-connected or connectable is. This makes it possible to flow through a constant amount of air to let. This is particularly advantageous in difficult rock conditions.
  • a flow restrictor attached or attachable according to claim 14
  • a lockable or screwable plug can be with or without passage. So in particular with different large bores equipped flow restrictors selected and used in order to take account of the air requirements caused by local conditions to wear.
  • a hammer drill generally designated 10, has, as can be seen from FIG. 1, a screw cap 11 with a central passage 12 and a threaded connection 13, with the interposition of a sealing ring 14 for connection of the main hammer body is used.
  • a strainer 16 is in the Screw cap 11 which can be screwed to a threaded bushing 50. This is welded to an outer tube 15 along a cylindrical welding zone S.
  • An annular gap 54 is between the outer tube 15 and a cylinder liner 70 formed, which leads a percussion piston 75.
  • the outer tube 15 has - starting at the lower area of welding zone S and threaded bush 50 - over the Scope distributed longitudinal longitudinal grooves 17, the approach of a Serve tool when screwing to the cap 11.
  • the screw cap 11 encloses an upward check valve 30, which is guided on a shaft 28 and the valve spring 29 there to a valve seat 18 charged.
  • Bottom side engages in the screw cap 11 within the Threaded sleeve 50 a cover plate 26, which preferably with the circumference axially extending passages 24 is provided, e.g. with a wreath of four Arch slits (Fig. 4).
  • An adjoining control pin 40 takes one preferably tapered insert 45 and projects into a central bore without contact 82 of the percussion piston 75 guided in the cylinder liner 70, even if this is in its lowest position (left in Fig. 1).
  • the use 45 of the Control pin 40 runs narrow from a diameter step 46 and has in particular an inner channel 105 in the center.
  • the threaded bushing 50 delimits a distribution chamber below the screw cap 11 56, which is fluidly connected to an inner chamber 42 of the control pin 40 is.
  • a control bushing 100 of the percussion piston 75 slides on the latter Slider valve through which the stroke air can be controlled.
  • the closes Control pin 40 having an upwardly convex flange or plate head 41 e.g. has twelve passages 48, directly on the flat or concave cover plate 26, which is axially and / or radially projecting on the circumference Bund 52 can have.
  • the plate head 41 has a groove receptacle on its underside for a sealing ring 53 to which the inner circumference of a sleeve 51 connects. This holds the plate head 41 and delimits the inside between the outer tube 15 and an upper sleeve part 55 an annular gap 54, which together with a radial gap 22 an upper chamber of relatively large volume forms.
  • the cylinder liner 70 has outer ribs 71, between which the air-guiding outer channels or Longitudinal slots 60 are distributed over the circumference (Fig. 6).
  • the latter sit down the with the cylinder liner 70 profile top sleeve 55, the with a collar 57 at the transition to the lower part 58 on the upper edge of the cylinder liner 70 sits and on which the sleeve 51 or the like with a flange 62.
  • the lower part of the rifle attachment 58 is rotationally fixed to the cylinder liner 70 by at least one pin 59 connected.
  • the control pin 40 has the shape of a tubular body. Its arched upwards Flange, plate head 41 or the like externally directed passages 48 provided the wreath of arch slots 24 of the cover plate 26 face upwards (FIGS. 4 and 5). At a paragraph 47 the plate head 41 has a circumferential groove 43 for receiving a sealing ring 53 the inner chamber 42 lead transverse or reversing bores 44 over a Circumferential recess 102 in the surrounding space. This represents in the raised position of the piston 75 is a compression chamber 83.
  • the lower end of the piston 75 is with a valve surface 79 on a foot valve 97 slidable, which sits in the head 91 of a drill bit 90. It has a central one Passage 92 and is held in a retaining cap 93, which after insertion of Head 91 and shaft 95 with the interposition of a buffer sleeve 85 and one Retaining rings 86 is screwed into the outer tube 15. A shoulder 88 of the retaining ring 86 comes to a stop on the head 91 of the drill bit 90 when the percussion piston 75 hits their impact surface 89 with his punch.
  • Fig. 1 also shows 3 shows two different working positions of the rotary hammer 10. The percussion piston can be seen in the right half of FIG. 3 75 in its impact position, in which its lower end on the surface 89 of the Drill bit 90 opens or is opened.
  • the structure of the percussion piston 75 is shown in FIG. 2. It is generally cylindrical and has transverse grooves 77 on the outside and an outer groove approximately in its longitudinal center Annular groove 76, which defines an upper control edge 80 and a lower control edge 81. These edges guide the opening and closing of the air flow Passages 72 at the lower end of a groove-shaped annular chamber 76 (FIG. 1). Distributed over the circumference, axial bores go from the annular groove 76 open to the outside 78 to the bottom of the piston 75. Its central bore 82 can beveled at the lower end and forms a valve surface immediately above 79 with the foot valve 97 when sliding on this in the lower piston position cooperates.
  • the percussion piston 75 in its upper part massive, not weakened by axial holes, so that the head surface 74 together with that of an attached control bush 100 fully for the working pressure is available.
  • the control pin 40 has an outer circumferential recess 102 with an upper one Control edge 106 and a lower control edge 107. In the area between the Control edges 106, 107 of the control pin 40 have radial outlets leading to the outside 101 and / or transverse bores 44 (FIGS. 1 and 3), which also have elongated holes or longitudinal slots (Fig. 2) and with the compression chamber 83 in constant flow connection.
  • the axial length of the control bush 100 is dimensioned so that it is in the deepest Position of the percussion piston 75 (right in Fig. 3), the cross bores 44 of the Control pin 40 still closes.
  • the percussion piston 75 moves on the return stroke high (left in Fig. 3), so the upper end of the control bushing 100 comes from below in a sleeve attachment 55/58, the control pin 40 in concentric Distance surrounds and down with a shoulder or flange 62 below Intermediate layer of a flexible ring 64 on a collar 57 of the cylinder liner 70 is supported.
  • the tubular control pin 40 goes on a diameter step 46 in the tapered insert 45 over that through the axial channel 105 to the inner chamber 42 is flow connected or connectable and as a flow restrictor or can act as a closure.
  • inserts can 45 with different sized bores or without a passage (see Fig. 1 and 3) can be used to ensure that drilling operations are carried out in the best possible To adapt conditions.
  • the invention is not restricted to the exemplary embodiments described, but can be modified in many ways. So you can easily between the screw cap 11 and the threaded bush 50 an adapter and / or a so-called. Install the turbo attachment as described in detail in DE-U-9 202 336. To can sit a sleeve between the connection cap 11 and an adapter, the Outer diameter is equal to that of the outer tube 15; she is with the Adapter directly or via a sliding piece including a short one guided in it Profile shaft drive-connectable. An additional, mechanical one is achieved Protected control option for airflow division, whereby on the one hand Central air brought into the drill bit 90 and on the other hand blown air as required is branched off.
  • the pneumatically driven hammer drill 10 has a connection cap 11 for a compressed air source and an outer tube 15, which is firmly connected to a threaded bushing 50.
  • a connection cap 11 for a compressed air source On a top part of a rifle 55 sits as a tubular body with an inner chamber 42, outer peripheral recess 102 and transverse bores 44 trained control pin 40, the has an insert 45 below and contactlessly in a central bore 82 Percussion piston 75 protrudes. This is massive at the top; to its externally open annular groove 76 - which need not be semi-oval, but e.g. as indicated by dashed lines in FIG.
  • the percussion piston 75 slides on a foot valve 97, which in a Cylinder liner 70 is guided, which also has the upper part of the bushing with outer ribs 55 and the outer tube 15 at least partially positively firmly connected to a unit e.g. has shrunk.
  • the control bush 100 is axially long enough to be in the impact position of the Percussion piston 75 closes the cross bores 44 of the control pin 40. in the In the lower area it has radial passages 101, which are e.g. can be formed at 60 ° circumferential intervals (Fig. 2).
  • the outer Circumferential recess 102 of the control pin 40 has control edges 106 or 107, in order - in particular through the circumferential recess 102, the transverse bores 44 and the radial passages 101 - between the inner chamber 42 and a compression chamber 83 delimited by the cylinder liner 70 To establish flow connection in the upper positions of the percussion piston 75 and to close in lower positions.
  • the inner chamber 42 of the control pin 40 is fluidly connectable to an insert channel 105.
  • the hammer drill 10 works without additional blowing air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP97117438A 1996-10-18 1997-10-09 Foreuse à percussion Ceased EP0837214A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29618066U DE29618066U1 (de) 1996-10-18 1996-10-18 Bohrhammer
DE29618066U 1996-10-18

Publications (2)

Publication Number Publication Date
EP0837214A2 true EP0837214A2 (fr) 1998-04-22
EP0837214A3 EP0837214A3 (fr) 1999-12-08

Family

ID=8030701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117438A Ceased EP0837214A3 (fr) 1996-10-18 1997-10-09 Foreuse à percussion

Country Status (2)

Country Link
EP (1) EP0837214A3 (fr)
DE (1) DE29618066U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978625A2 (fr) * 1998-08-03 2000-02-09 Hans-Philipp Walter Foreuse à percussion
DE102005015886A1 (de) * 2005-04-06 2006-10-26 Hans-Philipp Walter Bohrhammer
CN112901063A (zh) * 2021-02-24 2021-06-04 重庆科技学院 一种射吸式钻井提速工具

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2477778C2 (ru) * 2011-06-22 2013-03-20 Государственное образовательное учреждение высшего профессионального образования Новосибирский государственный архитектурно-строительный университет (Сибстрин) Пневматический ударный механизм
RU2477362C1 (ru) * 2011-06-23 2013-03-10 Государственное образовательное учреждение высшего профессионального образования Новосибирский государственный архитектурно-строительный университет (Сибстрин) Пневматический ударный механизм

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2705191A1 (de) 1976-02-09 1977-08-11 Reed Tool Co Schlagbohrwerkzeug
DE9202336U1 (fr) 1992-02-22 1992-05-07 Walter, Hans-Philipp, 7102 Lehrensteinsfeld, De

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3806407C2 (de) * 1988-02-29 1995-08-31 Keller Grundbau Gmbh Vorrichtung zur Herstellung von durch Zugabe von Binde- oder Abdichtmitteln verdichteten Bodenabschnitten
CZ278934B6 (en) * 1990-11-09 1994-09-14 Permon Air-operated submersible drilling machine
DE9319223U1 (de) * 1993-12-15 1994-02-24 Walter Hans Philipp Bohrhammer
US5562170A (en) * 1995-08-30 1996-10-08 Ingersoll-Rand Company Self-lubricating, fluid-actuated, percussive down-the-hole drill

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2705191A1 (de) 1976-02-09 1977-08-11 Reed Tool Co Schlagbohrwerkzeug
DE9202336U1 (fr) 1992-02-22 1992-05-07 Walter, Hans-Philipp, 7102 Lehrensteinsfeld, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978625A2 (fr) * 1998-08-03 2000-02-09 Hans-Philipp Walter Foreuse à percussion
EP0978625A3 (fr) * 1998-08-03 2001-06-06 Hans-Philipp Walter Foreuse à percussion
DE102005015886A1 (de) * 2005-04-06 2006-10-26 Hans-Philipp Walter Bohrhammer
DE102005015886B4 (de) * 2005-04-06 2008-06-19 Hans-Philipp Walter Bohrhammer
CN112901063A (zh) * 2021-02-24 2021-06-04 重庆科技学院 一种射吸式钻井提速工具

Also Published As

Publication number Publication date
DE29618066U1 (de) 1996-12-19
EP0837214A3 (fr) 1999-12-08

Similar Documents

Publication Publication Date Title
DE60118717T2 (de) Im-bohrloch-bohrhammer und kolben dafür
DE2541837A1 (de) Druckgasbetaetigtes schlagbohrgeraet
EP0004946B1 (fr) Marteau de forage, notamment marteau fond-de-trou
EP0060827B1 (fr) Dispositif de refroidissement pour le trépan d'une haveuse
EP0658681B1 (fr) Marteau à forage
DE60124271T2 (de) Bohrlochgesteinsbohrhammer, oberes anschlusstück und verfahren zur regelung des luftdruckes
AT404969B (de) Meisselhalter mit einer lösbar festgelegten meisselbüchse
DE1558992B1 (de) Tiefloch-Schlagbohrhammer
DE3628327C2 (fr)
DE2015270A1 (de) Mei&elvorrichtung für ein Schlagbohrwerkzeug zur Herstellung eines Grundloches
EP0837214A2 (fr) Foreuse à percussion
DE3840923A1 (de) Rammbohrgeraet
EP0154778B1 (fr) Perforateur à percussion
EP0978625A2 (fr) Foreuse à percussion
DE2733508C3 (de) Versenkbohrhammer
DE19500622A1 (de) Fluiddosiereinrichtung für ein durch ein komprimiertes Fluid betriebenes Werkzeug
DE1552320A1 (de) Bohrwerkzeug
DE1256597B (de) Pneumatisch betaetigter Schlagbohrhammer
DE1811202A1 (de) Bohrer
DE2609376C3 (de) Tieflochbohrhammer
DE3544126C1 (de) Werkzeug zum Hereingewinnen von mineralischen Rohstoffen,insbesondere von Kohle oder Hartstein
DE3526996C2 (de) Bohr- und Meisselhammer mit Entlüftung
DE102005015886B4 (de) Bohrhammer
DE935182C (de) Von einem Verbrennungsmotor angetriebene Gesteinsschlagbohrmaschine od. dgl.
DE3519592C2 (de) Drehschlagbohrkrone

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE FR GB LI

AX Request for extension of the european patent

Free format text: AL;LT;LV;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;RO;SI

17P Request for examination filed

Effective date: 19991104

AKX Designation fees paid
RBV Designated contracting states (corrected)

Designated state(s): AT CH DE FR GB LI

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20010719

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20020119