EP0403789A1 - Drill- or impacthammer - Google Patents

Drill- or impacthammer Download PDF

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Publication number
EP0403789A1
EP0403789A1 EP19900109177 EP90109177A EP0403789A1 EP 0403789 A1 EP0403789 A1 EP 0403789A1 EP 19900109177 EP19900109177 EP 19900109177 EP 90109177 A EP90109177 A EP 90109177A EP 0403789 A1 EP0403789 A1 EP 0403789A1
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EP
European Patent Office
Prior art keywords
holding
housing
bearing
holding plate
drill
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
EP19900109177
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German (de)
French (fr)
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EP0403789B1 (en
Inventor
Manfred Bleicher
Ulrich Dipl.-Ing. Bohne (Fh)
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0403789A1 publication Critical patent/EP0403789A1/en
Application granted granted Critical
Publication of EP0403789B1 publication Critical patent/EP0403789B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms

Definitions

  • the invention relates to a rotary hammer or percussion hammer according to the preamble of claim 1.
  • the fixed bearing for the wobble mechanism was pressed into the housing. This solution is complex to assemble.
  • the bearing is held with a locking ring, which can lead to accumulation of tolerances due to production in series production and subsequently to play in the wobble hub bearing.
  • the hammer drill or percussion hammer according to the invention with the characterizing features of claim 1 has the advantage over the prior art of providing play-free mounting of the wobble mechanism, which is also space-saving, easy to assemble and insensitive to tolerances.
  • Figure 1 shows a longitudinal section through a hammer drill
  • Figure 2 shows a section along line II-II in Figure 1.
  • the rotary hammer 10 has a motor 11 with a fan wheel 12 in a motor housing 13 which is screwed to an outer housing 14 in which a pneumatic hammer mechanism 15 is accommodated.
  • a tool holder 16 adjoins the striking mechanism 15, into which a tool 17 can be inserted.
  • the striking mechanism has a swash plate gear 19 as a movement conversion gear, which is driven by an intermediate shaft 20 connected to the motor 11.
  • a wobble hub 21 with a ball groove 23 that is at an angle to its axis 22 and a ball groove 24 that is perpendicular to its axis 22.
  • the ball groove 23 belongs to a bearing for a wobble finger 25 shown in broken lines, which has a hollow piston 26 with a beater 27 guided therein drives.
  • the holding housing 31 has a recess 32 in which the outer ring 29 is held radially in the sliding seat and towards the motor 11.
  • the holding housing 31 further receives the motor-side end of the intermediate shaft 20 in its lower region.
  • the holding housing 31 carries a tubular connection piece 33 projecting toward the striking mechanism 15 and having a slot 34 for the wobble finger 25 to pass through stored.
  • the hollow piston 26 is also guided in the drive tube 36.
  • the spigot 33 has lateral recesses 37, 38 on both sides above the roller bearing 28, into which a U-shaped holding plate 40 with legs 41 and 42 and the web part 43 connecting them can be inserted.
  • the holding plate 40 is elastic and preferably made of spring steel. It extends with its legs 41, 42 in the assembled state down to the height of the axis 22 of the wobble hub 21. The ends of the legs 41, 42 rest on the facing contact surface 44 of the outer bearing ring 29 (see FIG. 2). In the inserted state of the holding plate 40, a gap 45 remains between the web part 43 and the connection piece 33, which gap is formed, for example, in the form of a milling on the connection piece 33.
  • the side of the web part 43 facing away from the leg 41, 42 is expediently flattened so that it comes to lie approximately at the level of a mounting cam 46 cast onto the holding housing 31.
  • the cam 46 can also be designed as an indentation or protruding edge in the holding housing 31.
  • the tensioning cams can also extend upwards in the direction of the mounting cam 46.
  • the clamping cams are cast onto the holding housing 31 in such a way that the holding plate 40 comes to rest on the clamping cams with two support points 49, 50 near the web on its side facing the rolling bearing 28.
  • two cast-on housing cams 51, 52 protrude sideways. These cams 51, 52 are axially spaced from the bearing surface 44 by approximately the material thickness of the holding plate 40, so that it can be inserted between the roller bearing 28 and the housing cams 51, 52.
  • the side of the cams 51, 52 facing the rolling bearing 28 is chamfered in each case, so that the holding plate 40 rests on the lower edges 55, 56 of the cams 51, 52 with support points 53, 54 located approximately in the center of its legs.
  • the cams can be formed block-like. In the exemplary embodiment, they are more contoured for casting reasons.
  • the mounting of the holding plate 40 is carried out in a simple manner, for. B. with a screwdriver.
  • the holding plate 40 Before inserting the holding housing 31 into the outer housing 14, the holding plate 40 is inserted via the recesses 37, 38 between the housing cams 51, 52 and the roller bearing 28 until the web part 43 rests on the clamping cams 47, 48. Then the web part 43 is levered away from the holding housing 31 in the direction of the striking mechanism with a screwdriver, the holding plate flexing and coming to rest in front of the clamping cams 47, 48. Now the screwdriver is attached to the mounting cam 46 from the front and pressed against the flattened top of the web part 43. In this way, the holding plate 40 is pushed down into its end position shown in the drawing on the rolling bearing.
  • roller bearing 28 is pressed on its outer ring 29 without play against the recess 32 in the holding housing and is fixed in any direction.
  • the stop sheet metal holds self-locking in its tense end position. After installation in the outer housing 14, it is additionally prevented from evading upwards since the web part 43 abuts the outer housing 14 (see FIG. 2).
  • a screwdriver or the like is simply inserted into the gap 43 and the holding plate 40 is levered upwards.
  • the invention is not restricted to U-shaped holding plates.
  • two rod-shaped holding plates can rest on the left and right on the roller bearing 28 and each can be braced on the housing by itself.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Abstract

In a hammer with a pneumatic impact mechanism (15), the wobble mechanism (19) is to be mounted in the housing (31) in such a manner as to be free from play, space-saving, easy to assemble and insensitive to tolerance. For this purpose, a rolling bearing 28, seated on the wobble hub 21, is inserted with its outer ring 29 into a turned-down portion 32 of a retaining housing 31. Subsequently, the bearing is pressed against the turned-down portion 32 by means of a resilient retaining plate 40. The retaining plate is tensioned via cams 51 and 47 which are cast integral with the retaining housing 31. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Bohroder Schlaghammer nach der Gat­tung des Anspruchs 1. Bei bekannten Konstruktionen wurde das Festla­ger für das Taumelgetriebe in das Gehäuse eingepreßt. Diese Lösung ist in der Montage aufwendig. Gemäß Patentanmeldung P.38 19 125 ist das Lager mit einem Sicherungsring gehalten, was zu fertigungsbe­dingten Toleranzanhäufungen in der Serienproduktion und in der Folge zu Spiel in der Taumelnabenlagerung führen kann.The invention relates to a rotary hammer or percussion hammer according to the preamble of claim 1. In known constructions, the fixed bearing for the wobble mechanism was pressed into the housing. This solution is complex to assemble. According to patent application P.38 19 125, the bearing is held with a locking ring, which can lead to accumulation of tolerances due to production in series production and subsequently to play in the wobble hub bearing.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Bohroder Schlaghammer mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, eine spiel­freie Lagerung des Taumelgetriebes bereitzustellen, die außerdem noch platzsparend, montagefreundlich und toleranzunempfindlich ist.The hammer drill or percussion hammer according to the invention with the characterizing features of claim 1 has the advantage over the prior art of providing play-free mounting of the wobble mechanism, which is also space-saving, easy to assemble and insensitive to tolerances.

Durch die in den Ansprüchen 2ff aufgeführten Maßnahmen sind vorteil­hafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegeben Hammers möglich. Besonders vorteilhaft ist es, das Halteblech aus Federstahl herzustellen und an Nocken des Haltegehäuses zu verspan­nen. Die Nocken können mit geringem Aufwand an einen zum Halten des Schlagwerks ohnehin erforderlichen Stutzen des Haltegehäuses ange­gossen werden.Advantageous further developments and improvements of the hammer specified in claim 1 are possible through the measures listed in claims 2ff. It is particularly advantageous to manufacture the holding plate from spring steel and to clamp it to cams of the holding housing. The cams can be cast with little effort onto a nozzle of the holding housing which is required anyway for holding the striking mechanism.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung darge­stellt und in der nachfolgenden Beschreibung näher erläuert. Figur 1 zeigt einen Längsschnitt durch einen Bohrhammer, Figur 2 zeigt einen Schnitt gemäß Linie II-II in Figur 1.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. Figure 1 shows a longitudinal section through a hammer drill, Figure 2 shows a section along line II-II in Figure 1.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Der Bohrhammer 10 weist einen Motor 11 mit Lüfterrad 12 in einem Mo­torgehäuse 13 auf, das mit einem Außengehäuse 14 verschraubt ist, in dem ein pneumatisches Schlagwerk 15 untergebracht ist. An das Schlagwerk 15 schließt sich eine Werkzeugaufnahme 16 an, in die ein Werkzeug 17 einsetzbar ist.The rotary hammer 10 has a motor 11 with a fan wheel 12 in a motor housing 13 which is screwed to an outer housing 14 in which a pneumatic hammer mechanism 15 is accommodated. A tool holder 16 adjoins the striking mechanism 15, into which a tool 17 can be inserted.

Das Schlagwerk weist als Bewegungswandlungsgetriebe ein Taumelschei­bengetriebe 19 auf, das von einer mit dem Motor 11 in Verbindung stehenden Zwischenwelle 20 angetrieben wird. Auf dieser sitzt eine Taumelnabe 21 mit einer schräg zu ihrer Achse 22 stehenden Kugel­laufrille 23 und einer senkrecht zu ihrer Achse 22 stehenden Kugel­laufrille 24. Die Kugellaufrille 23 gehört zu einem Lager für einen gestrichelt dargestellten Taumelfinger 25, der einen Hohlkolben 26 mit darin geführtem Schläger 27 antreibt. Die Kugellaufrille 24 ge­ hört zu einem Wälzlager 28 mit Außenring 29, das der Lagerung der Taumelnabe 21 in einem Haltegehause 31 dient.The striking mechanism has a swash plate gear 19 as a movement conversion gear, which is driven by an intermediate shaft 20 connected to the motor 11. On this sits a wobble hub 21 with a ball groove 23 that is at an angle to its axis 22 and a ball groove 24 that is perpendicular to its axis 22. The ball groove 23 belongs to a bearing for a wobble finger 25 shown in broken lines, which has a hollow piston 26 with a beater 27 guided therein drives. The ball groove 24 ge listens to a rolling bearing 28 with an outer ring 29, which serves to support the wobble hub 21 in a holding housing 31.

Das Haltegehäuse 31 hat dazu eine Eindrehung 32, in der der Außen­ring 29 im Schiebesitz radial und zum Motor 11 hin gehalten ist. Das Haltegehäuse 31 nimmt in seinem unteren Bereich weiter das motorsei­tige Ende der Zwischenwelle 20 auf. In dem Bereich oberhalb der Tau­melnabe 21 trägt das Haltegehäuse 31 einen zum Schlagwerk 15 hin vorstehenden rohrartigen Stutzen 33 mit einem Schlitz 34 zum Durch­tritt des Taumelfingers 25. In dem Stutzen 33 ist über ein Nadella­ger 35 ein drehend angetriebenes Antriebsrohr 36 für den Drehantrieb der Werkzeugaufnahme 16 gelagert. In dem Antriebsrohr 36 ist auch der Hohlkolben 26 geführt.For this purpose, the holding housing 31 has a recess 32 in which the outer ring 29 is held radially in the sliding seat and towards the motor 11. The holding housing 31 further receives the motor-side end of the intermediate shaft 20 in its lower region. In the area above the wobble hub 21, the holding housing 31 carries a tubular connection piece 33 projecting toward the striking mechanism 15 and having a slot 34 for the wobble finger 25 to pass through stored. The hollow piston 26 is also guided in the drive tube 36.

Der Stutzen 33 weist beidseitig oberhalb des Wälzlagers 28 seitliche Aussparungen 37, 38 auf, in die ein U-förmiges Halteblech 40 mit Schenkein 41 und 42 und diese verbindendem Stegteil 43 einführbar ist. Das Halteblech 40 ist elastisch und vorzugsweise aus Feder­stahl. Es reicht mit seinen Schenkein 41, 42 im montierten Zustand bis auf die Höhe der Achse 22 der Taumelnabe 21 herunter. Dabei lie­gen die Enden der Schenkel 41, 42 an der zugewandten Anlagefläche 44 des Wälzlageraußenrings 29 an (siehe Figur 2). In eingesetztem Zu­stand des Halteblechs 40 bleibt zwischen dem Stegteil 43 und dem Stutzen 33 ein Spalt 45, der z.B. in Form einer Einfräsung am Stutzen 33 gebildet wird. Die den Schenkein 41,42 abgewandte Seite des Stegteils 43 ist zweckmäßigerweise abgeflacht, damit sie etwa in Höhe eines an das Haltegehäuse 31 angegossenen Montagenockens 46 zu liegen kommt. Der Nocken 46 kann auch als Einbuchtung oder hervor­stehende Kante im Haltegehäuse 31 ausgebildet sein. Seitlich vom Stutzen 33 ragen etwa in Höhe des Spalts 45 beidseitig Spannocken 47, 48 heraus, die axial in Richtung Schlagwerk gesehen die Ebene der Anlagefläche 44 des Wälzlagers 28 überragen. Die Spannocken kön­nen sich auch nach oben in Richtung des Montagenockens 46 er­strecken. Die Spannocken sind so an das Haltegehäuse 31 angegossen, daß das Halteblech 40 mit zwei stegnahen Auflagestellen 49, 50 auf seiner dem Wälzlager 28 zugewandten Seite an den Spannocken zu lie­gen kommt. Im unteren Bereich des Stutzens 33, nahe dem Schlitz 34 ragen seitwärts zwei angegossene Gehäusenocken 51, 52 heraus. Diese Nocken 51, 52 haben von der Anlagefläche 44 einen axialen Abstand von etwa der Materialstärke des Halteblechs 40, so daß dieses sich zwischen das Wälzlager 28 und die Gehäusenocken 51, 52 einführen läßt. Die dem Wälzlager 28 zugewandte Seite der Nocken 51, 52 ist jeweils abgeschrägt, so daß das Halteblech 40 mit etwa in dessen Schenkelmitten gelegenen Auflagestellen 53, 54 an den unteren Kanten 55, 56 der Nocken 51, 52 anliegt. Im übrigen können die Nocken klotzartig ausgebildet sein. Im Ausführungsbeispiel sind sie aus gußtechnischen Gründen stärker konturiert.The spigot 33 has lateral recesses 37, 38 on both sides above the roller bearing 28, into which a U-shaped holding plate 40 with legs 41 and 42 and the web part 43 connecting them can be inserted. The holding plate 40 is elastic and preferably made of spring steel. It extends with its legs 41, 42 in the assembled state down to the height of the axis 22 of the wobble hub 21. The ends of the legs 41, 42 rest on the facing contact surface 44 of the outer bearing ring 29 (see FIG. 2). In the inserted state of the holding plate 40, a gap 45 remains between the web part 43 and the connection piece 33, which gap is formed, for example, in the form of a milling on the connection piece 33. The side of the web part 43 facing away from the leg 41, 42 is expediently flattened so that it comes to lie approximately at the level of a mounting cam 46 cast onto the holding housing 31. The cam 46 can also be designed as an indentation or protruding edge in the holding housing 31. To the side of the stub 33 protrude at approximately the height of the gap 45 on both sides clamping cams 47, 48, the plane seen axially in the direction of the striking mechanism protrude from the contact surface 44 of the rolling bearing 28. The tensioning cams can also extend upwards in the direction of the mounting cam 46. The clamping cams are cast onto the holding housing 31 in such a way that the holding plate 40 comes to rest on the clamping cams with two support points 49, 50 near the web on its side facing the rolling bearing 28. In the lower area of the connecting piece 33, near the slot 34, two cast-on housing cams 51, 52 protrude sideways. These cams 51, 52 are axially spaced from the bearing surface 44 by approximately the material thickness of the holding plate 40, so that it can be inserted between the roller bearing 28 and the housing cams 51, 52. The side of the cams 51, 52 facing the rolling bearing 28 is chamfered in each case, so that the holding plate 40 rests on the lower edges 55, 56 of the cams 51, 52 with support points 53, 54 located approximately in the center of its legs. In addition, the cams can be formed block-like. In the exemplary embodiment, they are more contoured for casting reasons.

Die Montage des Halteblechs 40 erfolgt auf einfache Weise z. B. mit einem Schraubendreher. Vor dem Einsetzen des Haltegehäuses 31 in das Außengehäuse 14 wird das Halteblech 40 über die Aussparungen 37, 38 zwischen Gehäusenocken 51, 52 und Wälzlager 28 eingeschoben bis der Stegteil 43 an den Spannocken 47, 48 aufliegt. Sodann wird der Steg­teil 43 mit einem Schraubendreher vom Haltegehäuse 31 weg in Rich­tung Schlagwerk gehebelt, wobei sich das Halteblech durchbiegt und vor den Spannocken 47, 48 zu liegen kommt. Nun wird der Schrauben­dreher von vorne an den Montagenocken 46 angesetzt und gegen die ab­geflachte Oberseite des Stegteils 43 gedrückt. Auf diese Weise wird das Halteblech 40 bis in seine in der Zeichnung dargestellte Endpo­sition auf das Wälzlager hin heruntergeschoben. Damit wird das Wälz­lager 28 an seinem Außenring 29 spielfrei gegen die Eindrehung 32 im Haltegehäuse gepreßt und ist in jeder Richtung fixiert. Das Halte­ blech hält selbsthemmend in seiner verspannten Endlage. Nach der Montage in das Außengehäuse 14 wird es zusätzlich von diesem an ei­nem Ausweichen nach oben gehindert, da der Stegteil 43 an das Außen­gehäuse 14 anstößt (siehe Fig. 2).The mounting of the holding plate 40 is carried out in a simple manner, for. B. with a screwdriver. Before inserting the holding housing 31 into the outer housing 14, the holding plate 40 is inserted via the recesses 37, 38 between the housing cams 51, 52 and the roller bearing 28 until the web part 43 rests on the clamping cams 47, 48. Then the web part 43 is levered away from the holding housing 31 in the direction of the striking mechanism with a screwdriver, the holding plate flexing and coming to rest in front of the clamping cams 47, 48. Now the screwdriver is attached to the mounting cam 46 from the front and pressed against the flattened top of the web part 43. In this way, the holding plate 40 is pushed down into its end position shown in the drawing on the rolling bearing. Thus, the roller bearing 28 is pressed on its outer ring 29 without play against the recess 32 in the holding housing and is fixed in any direction. The stop sheet metal holds self-locking in its tense end position. After installation in the outer housing 14, it is additionally prevented from evading upwards since the web part 43 abuts the outer housing 14 (see FIG. 2).

Zur Demontage wird einfach mit einem Schraubendreher oder derglei­chen in den Spalt 43 eingegriffen und das Halteblech 40 nach oben abgehebelt.For disassembly, a screwdriver or the like is simply inserted into the gap 43 and the holding plate 40 is levered upwards.

Die Erfindung bleibt nicht auf U-förmige Haltebleche beschränkt. Stattdessen können beispielsweise auch zwei stabförmige Haltebleche links und rechts am Wälzlager 28 anliegen und jedes für sich am Gehäuse verspannt sein.The invention is not restricted to U-shaped holding plates. Instead of this, for example, two rod-shaped holding plates can rest on the left and right on the roller bearing 28 and each can be braced on the housing by itself.

Claims (9)

1. Bohr- oder Schlaghammer mit einem hin- und hergehenden Schlag­werk, das über ein Bewegungswandlungsgetriebe insbesondere Taumel­scheibengetriebe, angetrieben wird, welches eine rotierend angetrie­bene Taumelnabe aufweist mit einer senkrecht zu ihrer Achse angeord­neten Kugellaufrille für ein Wälzlager, dessen Außenring radial und auf einer Seite axial in einem Haltegehäuse fixiert ist, dadurch gekennzeichnet, daß das Wälzlager (28) axial von einem ela­stischen Halteblech (40) gegen das Haltegehäuse (31) gepreßt wird, das einerseits am Außenring (29) des Wälzlagers (28) und anderer­seits mit mindestens zwei auf gegenüberliegenden Seiten des Halte­blechs (40) gelegenen Auflagestellen (49, 50; 53, 54) an dem Halte­gehäuse (31) anliegt.1. drill or percussion hammer with a reciprocating percussion mechanism, which is driven via a motion converting gear, in particular a swash plate gear, which has a rotatingly driven wobble hub with a ball race groove arranged perpendicular to its axis for a rolling bearing, the outer ring of which is radial and one side is axial is fixed in a holding housing, characterized in that the rolling bearing (28) is pressed axially by an elastic holding plate (40) against the holding housing (31) which on the one hand on the outer ring (29) of the rolling bearing (28) and on the other hand with at least two opposing sides of the holding plate (40) lying support points (49, 50; 53, 54) on the holding housing (31). 2. Bohr- oder Schlaghammer nach Anspruch 1, dadurch gekennzeichnet, daß die dem Wälzlager (28) entfernt gelegenen Auflagestellen (49, 50) auf derselben Seite des Halteblechs (40) liegen wie das Wälzla­ger (28), und daß die dem Lager (28) nähergelegenen Auflagestellen (53, 54) sich auf der anderen Seite des Halteblechs (40) befinden.2. hammer drill or percussion hammer according to claim 1, characterized in that the roller bearings (28) remote support points (49, 50) on the same side of the retaining plate (40) as the roller bearing (28), and that the bearing ( 28) closer support points (53, 54) are on the other side of the holding plate (40). 3. Bohr- oder Schlaghammer nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß die Auflagestellen (49, 50; 53, 54) an am Haltegehäuse (31) angebrachten Nocken (47, 48; 51, 52) anliegen, die gegenüber der Ebene der Anlagefläche 44 am Wälzlager (28) gegeneinander ver­setzt sind, sodaß das Halteblech (40) in eingebautem Zustand durch­gebogen und gegen das Wälzlager (28) gepreßt wird.3. hammer drill or percussion hammer according to claim 1 or 2, characterized in that the support points (49, 50; 53, 54) on the holding housing (31) attached cams (47, 48; 51, 52) bear against the plane the contact surface 44 on the roller bearing (28) are offset from one another, so that the retaining plate (40) is bent in the installed state and pressed against the roller bearing (28). 4. Bohr- oder Schlaghammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Halteblech (40) U-förmig mit zwei Schenkeln (41, 42) ausgebildet ist und daß diese jeweils an dem Wälzlager (28) und dem Haltegehäuse (31) anliegen.4. hammer drill or percussion hammer according to one of the preceding claims, characterized in that the holding plate (40) is U-shaped with two legs (41, 42) and that these are each on the rolling bearing (28) and the holding housing (31) issue. 5. Bohr- oder Schlaghammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Halteblech (40) mit seinen Schenkeln (41, 42) einen rohrartigen Stutzen (33) des Haltegehäuses (31) zur Aufnahme eines Teils des Schlagwerks (15) umgreift.5. hammer drill or percussion hammer according to one of the preceding claims, characterized in that the holding plate (40) with its legs (41, 42) engages around a tubular socket (33) of the holding housing (31) for receiving a part of the striking mechanism (15) . 6. Bohr- oder Schlaghammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Stutzen (33) seitliche Aussparungen (37, 38) zum Einschieben des Halteblechs (40) aufweist.6. hammer drill or percussion hammer according to one of the preceding claims, characterized in that the connecting piece (33) has lateral recesses (37, 38) for inserting the holding plate (40). 7. Bohr- oder Schlaghammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Haltegehäuse (31) eine den Schenkeln (41, 42) zugewandte Kante oder Montagenocken (46) aufweist, der von einem Werkzeug hintergreifbar ist, um das Halteblech (40) zu mon­tieren.7. hammer drill or percussion hammer according to one of the preceding claims, characterized in that the holding housing (31) has an edge or mounting cam (46) facing the legs (41, 42), which can be gripped behind by a tool, around the holding plate (40 ) to assemble. 8. Bohr- oder Schlaghammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Stutzen (33) einen der Taumelnabe (21) zugewandten Schlitz (34) zum Durchtritt des Taumelfingers (25) aufweist.8. hammer drill or percussion hammer according to one of the preceding claims, characterized in that the connecting piece (33) has a slot (34) facing the wobble hub (21) for the passage of the wobble finger (25). 9. Bohr- oder Schlaghammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Stutzen (33) des Haltegehäuses (31) ein Lager (35) für ein rotierendes Antriebsrohr (36) aufnimmt.9. hammer drill or percussion hammer according to one of the preceding claims, characterized in that the connecting piece (33) of the holding housing (31) receives a bearing (35) for a rotating drive tube (36).
EP90109177A 1989-06-19 1990-05-16 Drill- or impacthammer Expired - Lifetime EP0403789B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919936 1989-06-19
DE3919936A DE3919936A1 (en) 1989-06-19 1989-06-19 DRILLING HAMMER

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EP0403789A1 true EP0403789A1 (en) 1990-12-27
EP0403789B1 EP0403789B1 (en) 1993-04-07

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JP (1) JP2924976B2 (en)
DE (2) DE3919936A1 (en)

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WO2004085118A1 (en) 2003-03-24 2004-10-07 Robert Bosch Gmbh Electric hand tool
US7705497B2 (en) 2004-12-23 2010-04-27 Black & Decker Inc. Power tool cooling
US8430182B2 (en) 2004-12-23 2013-04-30 Black & Decker Inc. Power tool housing

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DE19738813B4 (en) * 1997-09-05 2004-05-27 Ina-Schaeffler Kg axial piston

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DE2738057A1 (en) * 1977-06-29 1979-02-15 Bosch Gmbh Robert CRAFT MACHINE
GB2170746A (en) * 1985-02-12 1986-08-13 Bosch Gmbh Robert Hammer drill
DE3819125A1 (en) * 1988-06-04 1989-12-14 Bosch Gmbh Robert DRILLING HAMMER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738057A1 (en) * 1977-06-29 1979-02-15 Bosch Gmbh Robert CRAFT MACHINE
GB2170746A (en) * 1985-02-12 1986-08-13 Bosch Gmbh Robert Hammer drill
DE3819125A1 (en) * 1988-06-04 1989-12-14 Bosch Gmbh Robert DRILLING HAMMER

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004085118A1 (en) 2003-03-24 2004-10-07 Robert Bosch Gmbh Electric hand tool
US7036607B2 (en) 2003-03-24 2006-05-02 Robert Bosch Gmbh Electric hand tool
CN100352612C (en) * 2003-03-24 2007-12-05 罗伯特·博世有限公司 Electric hand tool
US7705497B2 (en) 2004-12-23 2010-04-27 Black & Decker Inc. Power tool cooling
US8430182B2 (en) 2004-12-23 2013-04-30 Black & Decker Inc. Power tool housing

Also Published As

Publication number Publication date
DE59001163D1 (en) 1993-05-13
JPH0326473A (en) 1991-02-05
DE3919936A1 (en) 1990-12-20
EP0403789B1 (en) 1993-04-07
JP2924976B2 (en) 1999-07-26

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