EP0771618B1 - Drilling and/or chiseling tool - Google Patents

Drilling and/or chiseling tool Download PDF

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Publication number
EP0771618B1
EP0771618B1 EP96810496A EP96810496A EP0771618B1 EP 0771618 B1 EP0771618 B1 EP 0771618B1 EP 96810496 A EP96810496 A EP 96810496A EP 96810496 A EP96810496 A EP 96810496A EP 0771618 B1 EP0771618 B1 EP 0771618B1
Authority
EP
European Patent Office
Prior art keywords
drilling
bearing
wobble
countershaft
pinion
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
EP96810496A
Other languages
German (de)
French (fr)
Other versions
EP0771618A2 (en
EP0771618A3 (en
Inventor
Josef Fünfer
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.)
Hilti AG
Original Assignee
Hilti 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 Hilti AG filed Critical Hilti AG
Publication of EP0771618A2 publication Critical patent/EP0771618A2/en
Publication of EP0771618A3 publication Critical patent/EP0771618A3/en
Application granted granted Critical
Publication of EP0771618B1 publication Critical patent/EP0771618B1/en
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
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate

Definitions

  • the invention relates to a drilling and / or chisel device with a striking mechanism a wobble pin of a wobble mechanism is driven.
  • a drilling and chiseling device is known, the striking mechanism and whose tool spindle is driven by an electric drive motor.
  • a wobble mechanism is arranged between the drive motor and the striking mechanism, that consists of a gear shaft with two bearings, one on the gear shaft non-rotatably arranged hub body, one arranged on the hub body, compared to this freely rotatable swash ring with a wobble pin and one with the drive motor cooperating, non-rotatably connected to the gear shaft Drive pinion.
  • the non-rotatable connection of the hub body and the Drive pinion opposite the gear shaft is used on the hub body and the drive pinion arranged internal spline, which in an external spline the gear shaft engages.
  • The serves as the rotary drive for the tool spindle Output sprocket external spline toothing of the gear shaft, which rotates in a engages gear connected to the tool spindle.
  • the spline gears are manufactured on processing machines whose high Hourly rates negatively affect the manufacturing costs of the gear shaft, the bearing body and the drive pinion. Because of this high manufacturing cost, this can known drilling and / or chiseling device cannot be produced economically.
  • the invention has for its object to provide a drilling and / or chisel device, its striking mechanism and tool spindle drive are simple and easy to assemble as well as being economically producible.
  • the object is achieved in that for actuating the wobble pin an integral countershaft is provided which has a groove for one Swash ring having wobble pin, at least one drive pinion and on both sides of the Groove has one bearing each.
  • the countershaft according to the invention in which the raceway and the drive pinion are in one piece arranged on it is simple in its construction, economical to manufacture and can be installed quickly and safely in the drilling and / or chiseling device.
  • the two Bearing points are spaced apart and act with corresponding ones in the housing of the drilling and / or chiseling device arranged storage areas together.
  • the countershaft has the groove on one, essentially one spherical bearing body forming outer contour.
  • the groove runs inclined to the longitudinal axis of the countershaft and is used to accommodate, for example Balls protruding into another groove on the inside of a swash ring.
  • On the wobble ring is the wobble pin projecting radially from the wobble ring.
  • the first is expediently located at a first, free end of the countershaft Bearing arranged.
  • This freely accessible bearing point can be used in a plain bearing be pressed into a corresponding storage area of the housing.
  • the diameter of the bearing corresponds to the inside diameter of the plain bearing.
  • This first bearing point can be from the opposite of the drilling direction, free end of the countershaft be formed.
  • the drive pinion is arranged between the first bearing point and the raceway. The The drive pinion is thus located in the area of the first, free end of the countershaft.
  • the one transferred from the countershaft to the striking mechanism via the wobble pin Drive movement creates loads that are perpendicular to the longitudinal extension on the Counter shaft act.
  • a good storage or support of the countershaft is achieved by preferably between the second, free end of the countershaft and the groove is arranged the second bearing point.
  • the drive pinion of which preferably has a larger effective diameter has as the output pinion, a tool spindle can be driven in this way that the speed of the tool spindle is lower than the speed of the drive motor.
  • the drilling and chiseling device shown in FIGS. 1 and 2 has a housing 1 a handle 6 in an end region of the housing opposite the drilling direction 1, an operating switch 7 arranged in the handle 6, one from the handle 6 protruding electric cable 8 and one with a tool spindle 23 in connection standing tool holder 9 in an end region of the drilling direction Housing 1 on.
  • the tool holder 9 is a drilling or chisel tool, not shown used.
  • the housing 1 consists of a counter to the drilling direction to the tool holder 9 adjoining gear housing 2 and one to the Gear housing 2 connecting motor housing 3 together.
  • an electric drive motor 4 is arranged, which is connected to the actuation switch 7 can be switched on.
  • the wobble mechanism 25 shown in particular in FIG. 2 is composed of a countershaft 11 with two bearings 19, 20, a drive pinion 10, one on the countershaft 11 arranged groove 15, a wobble ring 13, one on the wobble ring 13 arranged groove 16, a plurality of balls 14 and one arranged on the swash ring 13 Swashpin 12 together.
  • the swash ring 13 is on the balls 14 with respect to the countershaft 11 in the circumferential direction rotatably mounted.
  • the balls 14 partially protrude into the inclined to the longitudinal axis of the countershaft 11, arranged on the outer contour of the countershaft 11, circumferential groove 15, and partially in the on the inner contour of the Swash ring 13 arranged groove 16.
  • the drive pinion 10 acts with a toothing the drive shaft 5 of the drive motor 4 together.
  • free end is the first bearing 19, which is is supported on a first bearing region 17 of the housing 1 via a slide bearing 26.
  • An output pinion is located on a free end of the countershaft 11 facing the drilling direction 21 arranged in a rotatably connected to a tool spindle 23 Gear 22 engages.
  • the second bearing 20 is arranged, which is a ball bearing 27 is supported on a second bearing area 18 of the housing 1.
  • the striking mechanism 28 is composed of a cylinder 29 and an axially displaceable in the cylinder 29 Percussion piston 30 together.
  • the cylinder 29 is in one of the drilling directions opposite end area closed.
  • a movement joint 31 arranged with a pivot pin 32 which is perpendicular to the longitudinal extent of the pivot pin 32 extending bore.
  • the grips into this hole Swash pin 12 of the swash ring 13 a longitudinally displaceable.
  • the cylinder 29 is secured against rotation with the wobble pin 12 coupled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Description

Die Erfindung betrifft ein Bohr- und/oder Meisselgerät mit einem Schlagwerk, das von einem Taumelzapfen eines Taumelgetriebes angetrieben wird.The invention relates to a drilling and / or chisel device with a striking mechanism a wobble pin of a wobble mechanism is driven.

Aus der DE-OS 31 20 326 ist ein Bohr- und Meisselgerät bekannt, dessen Schlagwerk und dessen Werkzeugspindel von einem elektrischen Antriebsmotor angetrieben wird. Zwischen dem Antriebsmotor und dem Schlagwerk ist ein Taumelgetriebe angeordnet, das sich aus einer Getriebewelle mit zwei Lagerstellen, einem auf der Getriebewelle drehfest angeordneten Nabenkörper, einem auf dem Nabenkörper angeordneten, gegenüber diesem frei drehbaren Taumelring mit einem Taumelzapfen und einem mit dem Antriebsmotor zusammenwirkendes, drehfest mit der Getriebewelle verbundenen Antriebsritzel zusammensetzt. Der drehfesten Verbindung des Nabenkörpers und des Antriebsritzels gegenüber der Getriebewelle dient eine am Nabenkörper und dem Antriebsritzel angeordnete Innenkeilwellenverzahnung, die in eine Aussenkeilwellenverzahnung der Getriebewelle eingreift. Dem Drehantrieb der Werkzeugspindel dient die als Abtriebsritzel wirkende Aussenkeilwellenverzahnung der Getriebewelle, die in ein drehfest mit der Werkzeugspindel verbundenes Zahnrad eingreift.From DE-OS 31 20 326 a drilling and chiseling device is known, the striking mechanism and whose tool spindle is driven by an electric drive motor. A wobble mechanism is arranged between the drive motor and the striking mechanism, that consists of a gear shaft with two bearings, one on the gear shaft non-rotatably arranged hub body, one arranged on the hub body, compared to this freely rotatable swash ring with a wobble pin and one with the drive motor cooperating, non-rotatably connected to the gear shaft Drive pinion. The non-rotatable connection of the hub body and the Drive pinion opposite the gear shaft is used on the hub body and the drive pinion arranged internal spline, which in an external spline the gear shaft engages. The serves as the rotary drive for the tool spindle Output sprocket external spline toothing of the gear shaft, which rotates in a engages gear connected to the tool spindle.

Die Keilwellenverzahnungen werden auf Bearbeitungsmaschinen hergestellt, deren hohe Stundensätze sich negativ auf die Herstellkosten der Getriebewelle, des Lagerkörpers und des Antriebsritzels auswirken. Aufgrund dieser hohen Herstellkosten kann dieses bekannte Bohr- und/oder Meisselgerät nicht wirtschaftlich hergestellt werden.The spline gears are manufactured on processing machines whose high Hourly rates negatively affect the manufacturing costs of the gear shaft, the bearing body and the drive pinion. Because of this high manufacturing cost, this can known drilling and / or chiseling device cannot be produced economically.

Der Erfindung liegt die Aufgabe zugrunde, ein Bohr- und/oder Meisselgerät zu schaffen, dessen Schlagwerk- und Werkzeugspindelantrieb einfach und montagefreundlich aufgebaut sowie wirtschaftlich herstellbar ist.The invention has for its object to provide a drilling and / or chisel device, its striking mechanism and tool spindle drive are simple and easy to assemble as well as being economically producible.

Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass zur Betätigung des Taumelzapfens eine einstückige Vorgelegewelle vorgesehen ist, die eine Laufrille für einen, den Taumelzapfen aufweisenden Taumelring, wenigstens ein Antriebsritzel und beidseits der Laufrille je eine Lagerstelle aufweist.According to the invention, the object is achieved in that for actuating the wobble pin an integral countershaft is provided which has a groove for one Swash ring having wobble pin, at least one drive pinion and on both sides of the Groove has one bearing each.

Die erfindungsgemässe Vorgelegewelle, bei der die Laufrille und das Antriebsritzel einstückig daran angeordnet sind, ist einfach in ihrem Aufbau, wirtschaftlich herstellbar und lässt sich schnell und sicher in das Bohr- und/oder Meisselgerät einbauen. Die beiden Lagerstellen sind voneinander beabstandet und wirken mit entsprechenden, im Gehäuse des Bohr- und/oder Meisselgerätes angeordneten Lagerbereichen zusammen. Zwischen den Lagerstellen weist die Vorgelegewelle die Laufrille an einer, einen im wesentlichen kugelförmig ausgebildeten Lagerkörper bildenden Aussenkontur auf. Die Laufrille verläuft geneigt zur Längsachse der Vorgelegewelle und dient der Aufnahme beispielsweise von Kugeln, die in eine weitere Laufrille, an der Innenseite eines Taumelringes ragen. An dem Taumelring befindet sich der von dem Taumelring radial abragende Taumelzapfen.The countershaft according to the invention, in which the raceway and the drive pinion are in one piece arranged on it is simple in its construction, economical to manufacture and can be installed quickly and safely in the drilling and / or chiseling device. The two Bearing points are spaced apart and act with corresponding ones in the housing of the drilling and / or chiseling device arranged storage areas together. Between the bearing points, the countershaft has the groove on one, essentially one spherical bearing body forming outer contour. The groove runs inclined to the longitudinal axis of the countershaft and is used to accommodate, for example Balls protruding into another groove on the inside of a swash ring. On the wobble ring is the wobble pin projecting radially from the wobble ring.

Zweckmässigerweise ist an einem ersten, freien Ende der Vorgelegewelle die erste Lagerstelle angeordnet. Diese frei zugängliche Lagerstelle kann in ein Gleitlager eingesetzt werden, das in einem entsprechenden Lagerbereich des Gehäuses eingepresst ist. Der Durchmesser der Lagerstelle entspricht dabei dem Innendurchmesser des Gleitlagers. Diese erste Lagerstelle kann von dem der Bohrrichtung entgegengesetzten, freien Ende der Vorgelegewelle gebildet sein.The first is expediently located at a first, free end of the countershaft Bearing arranged. This freely accessible bearing point can be used in a plain bearing be pressed into a corresponding storage area of the housing. The diameter of the bearing corresponds to the inside diameter of the plain bearing. This first bearing point can be from the opposite of the drilling direction, free end of the countershaft be formed.

Bei Bohr- und /oder Meisselgeräten, bei denen der Antriebsmotor in einem der Bohrrichtung entgegengesetzten Bereich des Gehäuses angeordnet ist, und dessen Antriebswelle in Bohrrichtung aus dem Motorengehäuse ragt, ist vorteilhafterweise zwischen der ersten Lagerstelle und der Laufrille das Antriebsritzel angeordnet. Das Antriebsritzel befindet sich somit im Bereich des ersten, freien Endes der Vorgelegewelle.For drilling and / or chiseling devices in which the drive motor is in one of the drilling directions opposite region of the housing is arranged, and its drive shaft protrudes from the motor housing in the direction of drilling, is advantageous the drive pinion is arranged between the first bearing point and the raceway. The The drive pinion is thus located in the area of the first, free end of the countershaft.

Die von der Vorgelegewelle über den Taumelzapfen auf das Schlagwerk übertragene Antriebsbewegung erzeugt Belastungen, die senkrecht zur Längserstreckung auf die Vorgelegewelle wirken. Eine gute Lagerung bzw. Abstützung der Vorgelegewelle wird erreicht, indem vorzugsweise zwischen dem zweiten, freien Ende der Vorgelegewelle und der Laufrille die zweite Lagerstelle angeordnet ist. The one transferred from the countershaft to the striking mechanism via the wobble pin Drive movement creates loads that are perpendicular to the longitudinal extension on the Counter shaft act. A good storage or support of the countershaft is achieved by preferably between the second, free end of the countershaft and the groove is arranged the second bearing point.

Damit zusätzlich zum Schlagwerk eine mit einem Bohrwerkzeug zusammenwirkende Werkzeugspindel angetrieben werden kann, ist vorteilhafterweise an dem zweiten, freien Ende der Vorgelegewelle ein Abtriebsritzel angeordnet.So that, in addition to the striking mechanism, one that interacts with a drilling tool Tool spindle can be driven is advantageously on the second, free An output pinion is arranged at the end of the countershaft.

Mit einer Vorgelegewelle, deren Antriebsritzel vorzugsweise einen grösseren Wirkdurchmesser aufweist als das Abtriebsritzel, kann eine Werkzeugspindel derart angetrieben werden, dass die Drehzahl der Werkzeugspindel geringer ist als die Drehzahl des Antriebsmotors.With a countershaft, the drive pinion of which preferably has a larger effective diameter has as the output pinion, a tool spindle can be driven in this way that the speed of the tool spindle is lower than the speed of the drive motor.

Die Erfindung wird anhand von Zeichnungen, die ein Ausführungsbeispiel wiedergeben, näher erlautert. Es zeigen:

Fig. 1
ein erfindungsgemässes Bohr- und Meisselgerät mit Taumelgetriebe, schematisch dargestellt;
Fig. 2
ein Getriebegehäuse und ein Motorgehäuse des Bohr- und Meisselgerätes gemäss Fig. 1, teilweise geschnitten.
The invention will be explained in more detail with reference to drawings which show an exemplary embodiment. Show it:
Fig. 1
an inventive drilling and chiseling device with wobble mechanism, shown schematically;
Fig. 2
a gear housing and a motor housing of the drilling and chiseling device according to FIG. 1, partially cut.

Das in den Fig. 1 und 2 dargestellte Bohr- und Meisselgerät weist ein Gehäuse 1 mit einem Handgriff 6 in einem der Bohrrichtung entgegengesetzten Endbereich des Gehäuses 1, einen im Handgriff 6 angeordneten Betätigungsschalter 7, ein vom Handgriff 6 abragendes Elektrokabel 8 und einen mit einer Werkzeugspindel 23 in Verbindung stehenden Werkzeughalter 9 in einem der Bohrrichtung zugewandten Endbereich des Gehäuses 1 auf. In dem Werkzeughalter 9 ist ein nicht dargestelltes Bohr- oder Meisselwerkzeug einsetzbar. Das Gehäuse 1 setzt sich aus einem entgegen der Bohrrichtung an den Werkzeughalter 9 anschliessenden Getriebegehäuse 2 und einem sich an das Getriebegehäuse 2 anschliessende Motorgehäuse 3 zusammen. In dem Motorgehäuse 3 ist ein elektrischer Antriebsmotor 4 angeordnet, der mit dem Betätigungsschalter 7 einschaltbar ist.The drilling and chiseling device shown in FIGS. 1 and 2 has a housing 1 a handle 6 in an end region of the housing opposite the drilling direction 1, an operating switch 7 arranged in the handle 6, one from the handle 6 protruding electric cable 8 and one with a tool spindle 23 in connection standing tool holder 9 in an end region of the drilling direction Housing 1 on. In the tool holder 9 is a drilling or chisel tool, not shown used. The housing 1 consists of a counter to the drilling direction to the tool holder 9 adjoining gear housing 2 and one to the Gear housing 2 connecting motor housing 3 together. In the engine case 3, an electric drive motor 4 is arranged, which is connected to the actuation switch 7 can be switched on.

Das insbesondere in Fig. 2 dargestellte Taumelgetriebe 25 setzt sich aus einer Vorgelegewelle 11 mit zwei Lagerstellen 19, 20, einem Antriebsritzel 10, einer an der Vorgelegewelle 11 angeordneten Laufrille 15, einem Taumelring 13, einer an dem Taumelring 13 angeordneten Laufrille 16, mehreren Kugeln 14 und einem am Taumelring 13 angeordneten Taumelzapfen 12 zusammen. The wobble mechanism 25 shown in particular in FIG. 2 is composed of a countershaft 11 with two bearings 19, 20, a drive pinion 10, one on the countershaft 11 arranged groove 15, a wobble ring 13, one on the wobble ring 13 arranged groove 16, a plurality of balls 14 and one arranged on the swash ring 13 Swashpin 12 together.

Der Taumelring 13 ist über die Kugeln 14 gegenüber der Vorgelegewelle 11 in Umfangsrichtung drehbar gelagert. Die Kugeln 14 ragen zum Teil in die geneigt zur Längsachse der Vorgelegewelle 11 verlaufende, an der Aussenkontur der Vorgelegewelle 11 angeordnete, umlaufend ausgebildete Laufrille 15, und zum Teil in die an der Innenkontur des Taumelringes 13 angeordnete Laufrille 16. Das Antriebsritzel 10 wirkt mit einer Verzahnung der Antriebswelle 5 des Antriebsmotors 4 zusammen. An einem der Bohrrichtung entgegengesetzten, freien Ende befindet sich die erste Lagerstelle 19, die sich über ein Gleitlager 26 an einem ersten Lagerbereich 17 des Gehäuses 1 abstützt.The swash ring 13 is on the balls 14 with respect to the countershaft 11 in the circumferential direction rotatably mounted. The balls 14 partially protrude into the inclined to the longitudinal axis of the countershaft 11, arranged on the outer contour of the countershaft 11, circumferential groove 15, and partially in the on the inner contour of the Swash ring 13 arranged groove 16. The drive pinion 10 acts with a toothing the drive shaft 5 of the drive motor 4 together. At one of the drilling directions opposite, free end is the first bearing 19, which is is supported on a first bearing region 17 of the housing 1 via a slide bearing 26.

An einem der Bohrrichtung zugewandten, freien Ende der Vorgelegewelle 11 ist ein Abtriebsritzel 21 angeordnet, das in ein drehfest mit einer Werkzeugspindel 23 verbundenes Zahnrad 22 eingreift. Zwischen der Laufrille 15 und dem Abtriebsritzel 21 der Vorgelegewelle 11 ist die zweite Lagerstelle 20 angeordnet, die sich über ein Kugellager 27 an einem zweiten Lagerbereich 18 des Gehäuses 1 abstützt.An output pinion is located on a free end of the countershaft 11 facing the drilling direction 21 arranged in a rotatably connected to a tool spindle 23 Gear 22 engages. Between the raceway 15 and the driven pinion 21 Layshaft 11, the second bearing 20 is arranged, which is a ball bearing 27 is supported on a second bearing area 18 of the housing 1.

Das Schlagwerk 28 setzt sich aus einem Zylinder 29 und einem im Zylinder 29 axial versetzbaren Schlagkolben 30 zusammen. Der Zylinder 29 ist in einem der Bohrrichtung entgegengesetzten Endbereich geschlossen. An diesem Endbereich ist ein Bewegungsgelenk 31 mit einem Drehbolzen 32 angeordnet, der eine senkrecht zur Längserstreckung des Drehbolzens 32 verlaufende Bohrung aufweist. In diese Bohrung greift der Taumelzapfen 12 des Taumelringes 13 längsverschieblich ein. Über das Bewegungsgelenk 31 und den Drehbolzen 32 ist der Zylinder 29 verdrehsicher mit dem Taumelzapfen 12 gekuppelt.The striking mechanism 28 is composed of a cylinder 29 and an axially displaceable in the cylinder 29 Percussion piston 30 together. The cylinder 29 is in one of the drilling directions opposite end area closed. At this end area is a movement joint 31 arranged with a pivot pin 32 which is perpendicular to the longitudinal extent of the pivot pin 32 extending bore. The grips into this hole Swash pin 12 of the swash ring 13 a longitudinally displaceable. About the movement joint 31 and the pivot pin 32, the cylinder 29 is secured against rotation with the wobble pin 12 coupled.

Claims (6)

  1. A drilling and/or chiselling tool with a percussion or striking mechanism (28), which is driven by a wobble pin (12) of a wobble mechanism (25), characterized in that, for operating the wobble pin (12), a one-piece intermediate shaft (11) is provided, which has a raceway (15) for a wobble ring (13) including the wobble pin (12), at least one driving pinion (10) and a bearing (19, 20) on each side of the raceway (15).
  2. A drilling and/or chiselling tool according to Claim 1, characterized in that the first bearing (19) is disposed on a first free end of the intermediate shaft (11).
  3. A drilling and/or chiselling tool according to Claim 2, characterized in that the driving pinion (10) is disposed between the first bearing (19) and the raceway (15).
  4. A drilling and/or chiselling tool according to one of Claims 1 to 3, characterized in that the second bearing (20) is disposed between the second free end of the intermediate shaft (11) and the raceway (15).
  5. A drilling and/or chiselling tool according to Claim 4, characterized in that a driven pinion (21) is disposed on the second free end of the intermediate shaft (11).
  6. A drilling and/or chiselling tool according to Claim 5, characterized in that the driving pinion (10) has a larger working diameter than the driven pinion (21).
EP96810496A 1995-10-30 1996-07-26 Drilling and/or chiseling tool Expired - Lifetime EP0771618B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19540396A DE19540396A1 (en) 1995-10-30 1995-10-30 Drilling and / or chiseling device
DE19540396 1995-10-30

Publications (3)

Publication Number Publication Date
EP0771618A2 EP0771618A2 (en) 1997-05-07
EP0771618A3 EP0771618A3 (en) 1998-06-10
EP0771618B1 true EP0771618B1 (en) 2002-01-02

Family

ID=7776170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810496A Expired - Lifetime EP0771618B1 (en) 1995-10-30 1996-07-26 Drilling and/or chiseling tool

Country Status (5)

Country Link
US (1) US5787996A (en)
EP (1) EP0771618B1 (en)
JP (1) JPH09168979A (en)
CN (1) CN1068538C (en)
DE (2) DE19540396A1 (en)

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DE3120326A1 (en) * 1980-10-21 1982-05-27 Robert Bosch Gmbh, 7000 Stuttgart DRILLING HAMMER
FI67126C (en) * 1982-09-27 1985-01-10 Tampella Oy Ab KONTINUERLIGT ROTERANDE SLAGBORRMASKIN
NL8304043A (en) * 1983-11-24 1985-06-17 Skil Nederland Nv DEVICE FOR DRIVING A DRILL AND / OR IMPACT TOOL.
DE3506695A1 (en) * 1985-02-26 1986-08-28 Robert Bosch Gmbh, 7000 Stuttgart DRILLING HAMMER
DE3516494A1 (en) * 1985-05-08 1986-11-13 Hilti Ag, Schaan DRILLING HAMMER
DE9015285U1 (en) * 1990-02-13 1991-06-06 Kiefer, Klaus Jürgen, 2000 Hamburg Hand-held machine tool for multiple work functions
CN2098341U (en) * 1991-05-20 1992-03-11 庄建龙 Device for turning electric drill into percussion one
DE4215288A1 (en) * 1991-07-08 1993-01-14 Bosch Gmbh Robert DRILLING HAMMER

Also Published As

Publication number Publication date
DE59608538D1 (en) 2002-02-07
JPH09168979A (en) 1997-06-30
CN1068538C (en) 2001-07-18
DE19540396A1 (en) 1997-05-07
EP0771618A2 (en) 1997-05-07
EP0771618A3 (en) 1998-06-10
US5787996A (en) 1998-08-04
CN1153091A (en) 1997-07-02

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