EP0739691A1 - Appareil pour le réglage de la course de frappe d'un appareil à percussion mû par un fluide - Google Patents

Appareil pour le réglage de la course de frappe d'un appareil à percussion mû par un fluide Download PDF

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Publication number
EP0739691A1
EP0739691A1 EP96890077A EP96890077A EP0739691A1 EP 0739691 A1 EP0739691 A1 EP 0739691A1 EP 96890077 A EP96890077 A EP 96890077A EP 96890077 A EP96890077 A EP 96890077A EP 0739691 A1 EP0739691 A1 EP 0739691A1
Authority
EP
European Patent Office
Prior art keywords
control
control valve
valve piston
piston
channels
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
EP96890077A
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German (de)
English (en)
Other versions
EP0739691B1 (fr
Inventor
Karl Meisenbichler
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.)
Boehler Pneumatik International GmbH
Original Assignee
BOEHLER DRUCKLUFT und HYDRAULIK BAUGERAETE GmbH
Boehler Druckluft & Hydraulik
Bohler Druckluft und Hydraulik Baugerate GmbH
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Application filed by BOEHLER DRUCKLUFT und HYDRAULIK BAUGERAETE GmbH, Boehler Druckluft & Hydraulik, Bohler Druckluft und Hydraulik Baugerate GmbH filed Critical BOEHLER DRUCKLUFT und HYDRAULIK BAUGERAETE GmbH
Publication of EP0739691A1 publication Critical patent/EP0739691A1/fr
Application granted granted Critical
Publication of EP0739691B1 publication Critical patent/EP0739691B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof

Definitions

  • the invention relates to a device for adjusting the stroke of fluid-controlled impact devices, with a fluid-loaded control valve piston which interacts with control bores or control channels distributed in the axial direction of the control valve piston, control bores or control channels with control edges of the working piston of the impact device for alternately connecting work spaces of the Interact the working piston of the impact device with pressure or return lines.
  • a control valve is provided, the control valve piston of which is acted upon by a control pressure.
  • different control bores or control channels are released, which are connected to corresponding openings in the area of the working piston.
  • the control valve itself generally interacts with a changeover valve switched into the pressure line or the tank line.
  • a drilling process can be designed particularly effectively if the drilling speed is linked to a defined impact energy for a certain energy expenditure.
  • a low impact impact drill deforms rocks but does not necessarily break brittle rocks.
  • the impact energy must therefore be adapted to the desired propulsive power, and it is usually done in such a way that a long piston stroke of the working piston is chosen for a lower number of blows but a larger single impact energy is, conversely, a short piston stroke is set when a large number of strokes with low single impact energy was recognized as advantageous.
  • the automatic adjustment of such a piston stroke can be carried out as a function of the hammer system pressure.
  • a device suitable for this is described in DE-A-21 28 263.
  • a pin can be adjusted transversely to control bores or control channels so that in each case other control channels or control bores are completed when the working piston is lifted after they have been smoothed over by a control edge of the working piston and in this way the reversal of the stroke is triggered by the control valve.
  • the invention now aims to develop a device of the type mentioned in such a way that not only an automatic adjustment of the stroke of the percussion piston depending on operating parameters, such as the impact system pressure, but simultaneously and with the same device enables manual adjustment in a simple manner becomes.
  • the invention aims to provide a particularly compact and reliable design of the control valve which is suitable for this double task and which, despite its compact dimensions, can be operated in a simple manner.
  • the invention aims to enable a largely continuous adjustment of the stroke in the case of the automatic adjustment of the working stroke of the percussion piston as a function of an impact mechanism system pressure.
  • the device according to the invention consists essentially of the fact that the control valve piston can be rotatably coupled to a rotatable actuator and can be axially displaced in one rotational position against the force of a spring by fluid pressure and is axially displaceable in other rotational positions and is axially immovable in other rotational positions.
  • a rotatable actuator can be rotatably coupled to the control valve piston, it is possible to achieve a position by rotating the control valve piston, in which different control bores or control channels for controlling the stroke or for reversing the stroke of the percussion piston take effect.
  • control valve piston is axially displaceable against the force of a spring by fluid pressure in one rotational position and is axially immovable in the other rotational positions which correspond to the execution of the mechanical specifications.
  • the design according to the invention is further developed in such a way that the control valve piston has bores or channels offset in the axial direction and circumferential direction, which, in the case of axially immovable coupling to the rotatable actuator, can be placed in alignment with the control edges of the working piston of the impact device either with different control bores or control channels .
  • Such an arrangement of bores or channels offset in the axial direction and circumferential direction makes it possible to have different control bores or control channels become effective simply by rotating the control piston.
  • the regulation can take place in such a way that fluid is pressed out via the first open control bore or the first such open control channel, which is connected to a working chamber of the working piston, thereby simultaneously reversing the system pressure to the opposite working chamber for the purpose of reversing the movement of the percussion piston is effected. It is essential that with such a manual rotation and adjustment, in which a certain control bore or a certain control channel to the control edges of the working piston to the striking device in alignment is set, an axial displacement is prevented in order to actually be able to exactly adhere to the mechanical or manual default values.
  • the design is advantageously such that the control valve piston in the axially displaceable rotational position has channels on its side facing the control bores or control channels, which extend over part of the circumference of the control piston over a central angle in the manner of annular grooves.
  • Such a design of the control valve piston in which in a rotational position in which the axial displacement movement and thus the automatic adjustment is possible using a hammer mechanism system pressure, has the advantage that, due to the recesses or channels in the control valve piston extending over a central angle, a plurality of control bores offset in the circumferential direction can be ground by the control valve piston.
  • the design is advantageously made such that a plurality of control bores or control channels are arranged adjacent to one another in the axial direction and are distributed within the center angle of the channels extending over a part of the circumference of the control valve piston. In this way, a large number of bores are accommodated over a small axial length, which ensures compact dimensions.
  • a particularly simple design of the mechanical or manual adjustability can be achieved in that the rotationally locking coupling of the control valve piston to the rotatable actuator is effected by bolts of a sleeve engaging in grooves.
  • the axial displaceability of the control valve piston must be limited, the design preferably being such that the axial displaceability of the control valve piston is dependent on the rotational position, for example, on a stop axial groove adjoining annular groove or end faces of the control valve piston is limited.
  • the inventive training allows all effective components essentially to be accommodated concentrically with one another and in the smallest space, the configuration preferably being such that the fluid pressure line for actuating the control valve piston opens on the side of the control valve piston opposite the rotatable actuator.
  • the design is advantageously made such that the spring for the control valve piston is designed as the rotatable actuator concentrically overlapping compression spring is.
  • FIG. 1 shows a schematic illustration of the control of the percussion piston using a control valve piston acted upon by a control line
  • FIG. 2 shows an axial section through a first embodiment of the device according to the invention, the illustration being chosen in the rotational position in which the control valve piston is actuated by the 3 is a section along the line III / III of FIG. 2
  • FIG. 4 is a section along the line IV / IV of FIG. 2
  • FIG. 5 is a section along the line V / V of FIG.
  • Fig. 6 is a section along the line VI / VI / Fig. 2
  • FIG. 7 is a plan view in the direction of arrow VII on the control valve bores
  • Fig. 8 is an axial section through a modified design of a control valve in a pressure-dependent controllable position of the Control valve piston
  • FIG. 9 shows a section similar to FIG. 8 in a further displacement position of the control valve piston
  • FIG. 10 shows an adjustment of the control valve F 8 and 9 into the manually operable position, in which the axial stroke of the control valve piston is limited by a stop.
  • Fig. 1 denotes a percussion piston, the working spaces 2 and 3 of which are optionally connected to the pressure line 5 or the tank line 6 via a valve 4.
  • the switching valve 4 is reversed by a control valve 7, the control valve piston 8 of which can be displaced in the axial direction as a function of the pressure in a control line 9.
  • different control valve bores 10, 11 or 12 are brought into alignment with control edges 13 of the working piston 1, whereby the stroke reversal is brought about.
  • the line 15 is depressurized and causes the stroke to be reversed by switching the switching valve 4 via the pressure line 5.
  • 14 denotes a line to the tank and 16 a branch line connected to the pressure line 5.
  • the operating mode is selected by a locking device which consists of a rotatable actuator 17. On this, along the circumference, countersinks are fitted, into which a ball 19 preloaded by a spring 18 engages and thereby holds the set position.
  • the actuator 17 is rotated to the position at which the cylinder pin 20 overlaps with a longitudinal groove milled into the control valve housing and the control valve piston 8 executes axial movements in the feed line 9 depending on the control pressure.
  • the control valve piston is displaced against the spring force of the spring 22 up to a maximum possible stop at position 23.
  • the channels 24 of the control valve piston 8 pass over the staggered outflow channels 10, 11, 12, 26 or 27. The fluid can flow out via a cavity in the control valve piston and an outlet opening 25.
  • Fig. 3 shows the section III / III through the locking device.
  • the actuator 17 has recesses which engage with the ball 19 biased by a spring 18. The position of the control valve piston 8 necessary for the desired mode of operation is thus made.
  • Fig. 4 shows in section IV / IV the guide mechanism of the control valve piston 8, wherein axial projections of the control valve piston 8 are guided in the longitudinal grooves of the actuator 17.
  • the section V / V in FIG. 5 shows the continuous overlap of control bores or control channels 10, 11, 12, 26 and 27 with the arcuate recess or the channel 24 of the control valve piston 8 clearly.
  • different areas of the various control valve bores 10, 11, 12, 26 and 27 are covered and thus a largely continuous, automatic stroke control is possible.
  • Fig. 6 shows the section VI / VI through the area of the longitudinal groove made in the control valve housing.
  • the cylindrical pin 20 is guided in an annular groove of the housing and, in automatic operation, reaches the axially aligned longitudinal groove in which sliding in the axial direction is possible.
  • a movement in the axial direction is not possible since outside the longitudinal groove area the width of the cylindrical pin corresponds exactly to the width of the annular groove and thus locks the control valve piston 8 against axial displacement.
  • FIG. 7 shows the top view of the connecting bores 10, 11 and 12, which, depending on the position of the striking device, are covered or opened by the striking piston 1 thereof.
  • the holes are both axial as control channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
EP19960890077 1995-04-27 1996-04-24 Appareil pour le réglage de la course de frappe d'un appareil à percussion mû par un fluide Expired - Lifetime EP0739691B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT731/95 1995-04-27
AT73195 1995-04-27
AT73195A AT407280B (de) 1995-04-27 1995-04-27 Einrichtung zum verstellen des hubes von fluidgesteuerten schlageinrichtungen

Publications (2)

Publication Number Publication Date
EP0739691A1 true EP0739691A1 (fr) 1996-10-30
EP0739691B1 EP0739691B1 (fr) 2000-03-08

Family

ID=3498323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960890077 Expired - Lifetime EP0739691B1 (fr) 1995-04-27 1996-04-24 Appareil pour le réglage de la course de frappe d'un appareil à percussion mû par un fluide

Country Status (3)

Country Link
EP (1) EP0739691B1 (fr)
AT (1) AT407280B (fr)
DE (1) DE59604569D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1074810C (zh) * 1999-02-12 2001-11-14 地质矿产部勘探技术研究所 可输出高冲击功的液动潜孔锤
WO2006137775A1 (fr) * 2005-06-22 2006-12-28 Atlas Copco Rock Drills Ab Dispositif a percussion pour perforatrice de roches, methode permettant de realiser un mouvement de piston a percussion alternative et perforatrice de roches
WO2006137776A1 (fr) * 2005-06-22 2006-12-28 Atlas Copco Rock Drills Ab Dispositif de valve pour dispositif a percussion et dispositif a percussion pour perforatrice de roches
CN103492131A (zh) * 2011-04-27 2014-01-01 阿特拉斯·科普柯凿岩设备有限公司 冲击机构及包括这种冲击机构的凿岩机和钻机
KR20160114046A (ko) * 2014-01-30 2016-10-04 후루까와 로크 드릴 가부시끼가이샤 액압식 타격 장치
WO2018043175A1 (fr) * 2016-08-31 2018-03-08 古河ロックドリル株式会社 Dispositif de percussion hydraulique
FR3077753A1 (fr) * 2018-02-14 2019-08-16 Montabert Procede de reglage de la course de frappe d’un piston de frappe d’un appareil a percussions, et un appareil a percussions pour la mise en œuvre de ce procede

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244769A1 (de) * 1972-09-13 1974-03-21 Salzgitter Maschinen Ag Hydrohammer
CH597500A5 (en) * 1975-03-17 1978-04-14 Linden Alimak Ab Rotary percussive rock drill
DE3115361A1 (de) * 1981-04-16 1982-10-28 Hydroc Gesteinsbohrtechnik GmbH, 5960 Olpe "hydraulische schlagvorrichtung"

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2838940C3 (de) * 1978-09-07 1981-05-27 Danfoss A/S, 6430 Nordborg Druckbeeinflussungsvorrichtung für ein hydraulisches System
DE3103856A1 (de) * 1981-02-05 1982-09-09 Hydroc Gesteinsbohrtechnik GmbH, 5960 Olpe Hydraulische schlagvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244769A1 (de) * 1972-09-13 1974-03-21 Salzgitter Maschinen Ag Hydrohammer
CH597500A5 (en) * 1975-03-17 1978-04-14 Linden Alimak Ab Rotary percussive rock drill
DE3115361A1 (de) * 1981-04-16 1982-10-28 Hydroc Gesteinsbohrtechnik GmbH, 5960 Olpe "hydraulische schlagvorrichtung"

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1074810C (zh) * 1999-02-12 2001-11-14 地质矿产部勘探技术研究所 可输出高冲击功的液动潜孔锤
EP1907141A4 (fr) * 2005-06-22 2015-02-18 Atlas Copco Rock Drills Ab Dispositif de valve pour dispositif a percussion et dispositif a percussion pour perforatrice de roches
WO2006137775A1 (fr) * 2005-06-22 2006-12-28 Atlas Copco Rock Drills Ab Dispositif a percussion pour perforatrice de roches, methode permettant de realiser un mouvement de piston a percussion alternative et perforatrice de roches
WO2006137776A1 (fr) * 2005-06-22 2006-12-28 Atlas Copco Rock Drills Ab Dispositif de valve pour dispositif a percussion et dispositif a percussion pour perforatrice de roches
EP1907141A1 (fr) * 2005-06-22 2008-04-09 Atlas Copco Rock Drills AB Dispositif de valve pour dispositif a percussion et dispositif a percussion pour perforatrice de roches
US7581599B2 (en) 2005-06-22 2009-09-01 Atlas Copco Rock Drills Ab Percussive device for a rock drilling machine, method for achieving a reciprocating piston movement and rock drilling machine
CN101189077B (zh) * 2005-06-22 2010-05-19 阿特拉斯科普科凿岩机股份公司 用于撞击装置的阀装置和用于钻岩机的撞击装置
CN101189078B (zh) * 2005-06-22 2010-05-19 阿特拉斯科普科凿岩机股份公司 用于钻岩机的撞击装置、用于获得往复式撞击活塞运动的方法以及钻岩机
US7896100B2 (en) 2005-06-22 2011-03-01 Atlas Copco Rock Drills Ab Valve device for a percussion device and a percussion device for a rock drilling machine
NO340527B1 (no) * 2005-06-22 2017-05-02 Atlas Copco Rock Drills Ab Slaganordning for en fjellboremaskin og en fjellboremaskin
AU2012249219B2 (en) * 2011-04-27 2016-09-22 Epiroc Rock Drills Aktiebolag An impact mechanism, rock drill and drill rig comprising such impact mechanism
CN103492131A (zh) * 2011-04-27 2014-01-01 阿特拉斯·科普柯凿岩设备有限公司 冲击机构及包括这种冲击机构的凿岩机和钻机
JP2014512278A (ja) * 2011-04-27 2014-05-22 アトラス コプコ ロツク ドリルス アクチボラグ 衝撃機構と該衝撃機構を備えた削岩機及びドリルリグ
CN103492131B (zh) * 2011-04-27 2015-10-07 阿特拉斯·科普柯凿岩设备有限公司 冲击机构及包括这种冲击机构的凿岩机和钻机
EP2701880A1 (fr) * 2011-04-27 2014-03-05 Atlas Copco Rock Drills AB Mécanisme à chocs, marteau perforateur et foreuse comportant un tel mécanisme à chocs
EP2701880A4 (fr) * 2011-04-27 2014-09-10 Atlas Copco Rock Drills Ab Mécanisme à chocs, marteau perforateur et foreuse comportant un tel mécanisme à chocs
US9511489B2 (en) 2011-04-27 2016-12-06 Atlas Copco Rock Drills Ab Impact mechanism, rock drill and drill rig comprising such impact mechanism
KR20160114046A (ko) * 2014-01-30 2016-10-04 후루까와 로크 드릴 가부시끼가이샤 액압식 타격 장치
JPWO2015115105A1 (ja) * 2014-01-30 2017-03-23 古河ロックドリル株式会社 液圧式打撃装置
EP3100829A1 (fr) * 2014-01-30 2016-12-07 Furukawa Rock Drill Co., Ltd. Dispositif de martelage hydraulique
EP3100829A4 (fr) * 2014-01-30 2017-05-10 Furukawa Rock Drill Co., Ltd. Dispositif de martelage hydraulique
US10150209B2 (en) 2014-01-30 2018-12-11 Furukawa Rock Drill Co., Ltd. Hydraulic hammering device
EP3928927A1 (fr) * 2014-01-30 2021-12-29 Furukawa Rock Drill Co., Ltd. Dispositif de percussion hydraulique
WO2018043175A1 (fr) * 2016-08-31 2018-03-08 古河ロックドリル株式会社 Dispositif de percussion hydraulique
JPWO2018043175A1 (ja) * 2016-08-31 2019-02-21 古河ロックドリル株式会社 液圧式打撃装置
US11084155B2 (en) 2016-08-31 2021-08-10 Furukawa Rock Drill Co., Ltd. Hydraulic striking device
FR3077753A1 (fr) * 2018-02-14 2019-08-16 Montabert Procede de reglage de la course de frappe d’un piston de frappe d’un appareil a percussions, et un appareil a percussions pour la mise en œuvre de ce procede
WO2019158849A1 (fr) * 2018-02-14 2019-08-22 Montabert Procédé de réglage de la course de frappe d'un piston de frappe d'un appareil à percussions, et un appareil à percussions pour la mise en œuvre de ce procédé

Also Published As

Publication number Publication date
DE59604569D1 (de) 2000-04-13
AT407280B (de) 2001-02-26
EP0739691B1 (fr) 2000-03-08
ATA73195A (de) 2000-06-15

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