EP0445636A1 - Electrically operated hammer - Google Patents

Electrically operated hammer Download PDF

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Publication number
EP0445636A1
EP0445636A1 EP19910102887 EP91102887A EP0445636A1 EP 0445636 A1 EP0445636 A1 EP 0445636A1 EP 19910102887 EP19910102887 EP 19910102887 EP 91102887 A EP91102887 A EP 91102887A EP 0445636 A1 EP0445636 A1 EP 0445636A1
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EP
European Patent Office
Prior art keywords
handle
pawl
tool according
hand tool
housing
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
EP19910102887
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German (de)
French (fr)
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EP0445636B1 (en
Inventor
Ulrich Dipl.-Ing. Mütschele
Karl Dr. Ing. Wanner
Johann Kaltenecker
Gerhard Meixner
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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 EP0445636A1 publication Critical patent/EP0445636A1/en
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Publication of EP0445636B1 publication Critical patent/EP0445636B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/04—Cases; Covers
    • H01H21/10—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings

Definitions

  • the invention relates to an electrically operated hand tool according to the preamble of claim 1.
  • a rotary hammer which has a closed handle and a switch arranged therein with a handle having. This means that the electrical lines from the switch to the motor must be passed through the handle. The power cord is also inserted into the handle.
  • This widespread design requires a lot of installation work for the cabling.
  • the hammer falls and is hit hard, there is a risk of damaging the sensitive grip area and subsequently exposing live cables. This can pose a danger to the operator.
  • the handheld power tool according to the invention with the characterizing features of claim 1 has the advantage that the assembly effort is considerably reduced, the electrical lines are better protected and the handle can be ergonomically optimized.
  • the area beyond the handle openings of the handle is well protected when the hammer is struck hard on the handle.
  • a location that is easy to manufacture and assemble is preferably selected for the switch, in particular on the outside of the housing.
  • the pawl and the means for power transmission consist of a coherent piece and are articulated together. It is also advantageous that no additional parts such as bolts etc. are used for the rotary bearing of the pawl. This makes assembly considerably easier.
  • Another advantage is a frame for the pawl that can be inserted into a groove of the handle. In this way, the handle can be mounted without tools with two handles and only needs to be screwed onto the hammer housing. Also advantageous is the arrangement of the pawl in the handle part of the handle and the laying of the linkage for power transmission in a web of the handle; this means that the familiar, convenient location of the pawl is retained.
  • inexpensive vibration damping can be achieved in that the handle has a rigid frame which is coated with an elastic material.
  • Figure 1 shows a hammer in partial section
  • Figure 2 shows a cross section along line II-II in Figure 1.
  • a hammer drill 1 has a housing 2 made of plastic, which has a cylindrical housing part in which a motor 3 is housed. Furthermore, a striking mechanism 4, which is only indicated in the drawing, is contained in the housing 2 perpendicular to the motor 3. In an extension of the striking mechanism 4, a tool holder 5 with a drilling tool 6 is arranged in a manner known per se. At the end of the hammer opposite the tool holder, a handle 7 is fastened to the housing 2 with screws 8.
  • the handle 7 has the shape of a spade handle and consists of a frame 9 made of plastic, which has a substantially U-shaped cross section (see FIG. 2).
  • the handle 7 has webs 10 and a central web 11.
  • the handle 7 has in its grip part 12 gripped by the hand of the operator and in the upper web 10 and the central web 11 a circumferential central groove 13 which faces the housing 2.
  • the scaffold 9 is provided with an easily accessible elastic sheath 14, e.g. B. enclosed a foam material.
  • the whole handle 7 consists of an undivided solid part.
  • the webs 10, 11 form an upper 15 and a lower handle opening 16 for holding with both hands, so that a so-called double spade handle is created.
  • the handle openings 15, 16 are closed by a wall 17 facing the housing 2.
  • a closed frame 18 is inserted, which can be made of plastic or sheet metal.
  • the frame In the area of the grip part 12, the frame consists of 2 parallel tabs 19 and 20 which rest in the walls of the groove 13.
  • the two tabs 19, 20 each have a bore 21, 22 on the opposite side.
  • the tabs 19, 20 At the ends facing the handle part 12, the tabs 19, 20 each have an insertion bevel 23, 24 on their inner side opposite each other.
  • the switching pawl 26 has two opposite pins 27, 28 which engage in the bores 21, 22 and thus form a pivot bearing for the switching pawl designed as a two-armed lever.
  • a manually operable actuating part 29 is arranged above the pins 27, 28.
  • a lever 30 is formed with a pan 31 at the end.
  • a resilient connecting element 32 runs parallel to the lever and is integrally connected to a linkage 34.
  • the linkage 34 runs in the central web 11 and has a contact piece 35 which bears against the pan 31.
  • the front end 36 of the linkage 34 is connected to a switch 37 for switching the hammer drill 1 on and off.
  • the linkage 34 and the contact piece 35 together with the socket 31 form means for transmitting the actuating force exerted on the pawl 26 to the switch 37
  • This is accommodated outside the handle 7 in or on the housing 2 of the rotary hammer, advantageously in particular in the space between the handle 7 and the housing 2.
  • the switch 37 can also be attached to the wall 17 of the handle 7 facing the housing 2.
  • the switch 37 is designed as a non-latching pressure switch and is connected to a connecting cable 38 inserted into the housing 2.
  • the pawl and the linkage 34 firmly connected to it are first pressed in in the direction of arrow A, that is to say from the outside, between the tabs 19, 20 of the frame 18.
  • the pins 27, 28 slide over the insertion bevel 23, 24 until they snap into the bores 21, 22.
  • the frame 18 is inserted with the mounted pawl 26 in the direction of arrow B into the groove 13 of the handle 7.
  • the frame 18 closes the groove 13 in the connecting webs 10, 11.
  • the actuating part 29 is inserted into the groove 13.
  • the completely pre-assembled handle 7 is now attached to the housing 2 the screws 8 screwed on.
  • the linkage 34 comes to lie exactly in front of the switch 37, so that the switch can be operated correctly.
  • the invention is not limited to the exemplary embodiment described.
  • the pawl can also be pushed in longitudinally displaceably instead of rotatably with longitudinal guides in the frame arranged in the handle.
  • the invention is also applicable to other power tools such as drills or screwdrivers.

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

Abstract

In an electrically driven hammer, in particular drill hammer, the outlay for assembly, in particular of the electrical components, is to be reduced. For this purpose, the on/off switch (37), which is conventionally located in the handle (7), is moved to the housing (2) opposite the handle and is connected via a linkage (34) to a pawl (26) in the handle (7). This has the advantage that there are no longer any electrical components accommodated inside the handle (7). The pawl (26) is inserted, ready assembled together with a frame (18), into the handle (7), which is then screwed to the housing (2) of the hammer (1). All electrical and electronic components, such as motor (3), switch (37) and mains cable (38), are accommodated in the housing (2). As a result, the electrical components are better protected in the event of an impact of the hammer. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer elektrisch betriebenen Handwerkzeugmaschine nach der Gattung des Anspruchs 1. Aus der DE-OS 34 04 962 (=GB-PS 21 53 735) ist bereits ein Bohrhammer bekannt, der einen geschlossenen Handgriff und einen darin angeordneten Schalter mit Handhabe aufweist. Dies bringt es mit sich, daß die elektrischen Leitungen von dem Schalter zum Motor durch den Handgriff hindurchgeführt werden müssen. Auch die Netzanschlußleitung ist in den Handgriff eingeführt. Diese weitverbreitete Konstruktion erfordert einen hohen Montageaufwand bei der Verkabelung. Außerdem besteht beim Herabfallen und harten Aufschlagen des Hammers die Gefahr, daß der empfindliche Griffbereich beschädigt wird und anschließend spannungsführende Leitungen freiliegen. Davon können Gefahren für die Bedienungsperson ausgehen.The invention relates to an electrically operated hand tool according to the preamble of claim 1. From DE-OS 34 04 962 (= GB-PS 21 53 735) a rotary hammer is already known which has a closed handle and a switch arranged therein with a handle having. This means that the electrical lines from the switch to the motor must be passed through the handle. The power cord is also inserted into the handle. This widespread design requires a lot of installation work for the cabling. In addition, if the hammer falls and is hit hard, there is a risk of damaging the sensitive grip area and subsequently exposing live cables. This can pose a danger to the operator.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Handwerkzeugmaschine mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß der Montageaufwand erheblich verringert wird, die elektrischen Leitungen besser geschützt sind und der Handgriff ergonomisch optimal ausgestaltet werden kann.The handheld power tool according to the invention with the characterizing features of claim 1 has the advantage that the assembly effort is considerably reduced, the electrical lines are better protected and the handle can be ergonomically optimized.

Der Bereich jenseits der Grifföffnungen des Handgriffs ist bei hartem Aufschlagen des Hammers auf den Handgriff gut geschützt. Vorzugsweise wird ein fertigungs- und montagefreundlicher Ort für den Schalter, insbesondere an der Außenseite des Gehäuses gewählt.The area beyond the handle openings of the handle is well protected when the hammer is struck hard on the handle. A location that is easy to manufacture and assemble is preferably selected for the switch, in particular on the outside of the housing.

Durch die in den Ansprüchen 2 folgende aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Handwerkzeugmaschine möglich. Besonders vorteilhaft ist es, daß die Schaltklinke und die Mittel zur Kraftübertragung aus einem zusammenhängendem Stück bestehen und gelenkig miteinander verbunden sind. Vorteilhaft ist es auch, daß für das Drehlager der Schaltklinke keine zusätzlichen Teile wie Bolzen etc. verwendet werden. Dies erleichtert die Montage ganz erheblich. Vorteilhaft ist weiter ein in eine Nut des Handgriffs einschiebbarer Rahmen für die Schaltklinke. Auf diese Weise läßt sich der Handgriff ohne Werkzeug mit zwei Griffen montieren und braucht nur noch an das Hammergehäuse angeschraubt zu werden. Von Vorteil ist auch die Anordnung der Schaltklinke im Griffteil des Handgriffs und die Verlegung des Gestänges zur Kraftübertragung in einen Steg des Handgriffs; damit wird die gewohnte, griffgünstige Lage der Schaltklinke beibehalten. Eine kostengünstige Schwingungsdämpfung kann bei der erfindungsgemäßen Handwerkzeugmaschine dadurch erreicht werden, daß der Handgriff ein starres Gerüst aufweist, das mit einem elastischen Werkstoff ummantelt ist.Advantageous further developments and improvements of the hand-held power tool specified in claim 1 are possible through the measures listed in claims 2. It is particularly advantageous that the pawl and the means for power transmission consist of a coherent piece and are articulated together. It is also advantageous that no additional parts such as bolts etc. are used for the rotary bearing of the pawl. This makes assembly considerably easier. Another advantage is a frame for the pawl that can be inserted into a groove of the handle. In this way, the handle can be mounted without tools with two handles and only needs to be screwed onto the hammer housing. Also advantageous is the arrangement of the pawl in the handle part of the handle and the laying of the linkage for power transmission in a web of the handle; this means that the familiar, convenient location of the pawl is retained. In the handheld power tool according to the invention, inexpensive vibration damping can be achieved in that the handle has a rigid frame which is coated with an elastic material.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Figur 1 zeigt einen Hammer im Teilschnitt und Figur 2 einen Querschnitt 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 hammer in partial section and Figure 2 shows a cross section along line II-II in Figure 1.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein Bohrhammer 1 hat ein Gehäuse 2 aus Kunststoff, das einen zylindrischen Gehäuseteil aufweist, in dem ein Motor 3 untergebracht ist. Weiter ist in dem Gehäuse 2 senkrecht zum Motor 3 ein in der Zeichnung nur angedeutetes Schlagwerk 4 enthalten. In Verlängerung des Schlagwerks 4 ist in an sich bekannter Weise eine Werkzeugaufnahme 5 mit Bohrwerkzeug 6 angeordnet. Am der Werkzeugaufnahme gegenüberliegenden Ende des Hammers ist an das Gehäuse 2 ein Handgriff 7 mit Schrauben 8 befestigt. Der Handgriff 7 hat die Form eines Spatenhandgriffs und besteht aus einem Gerüst 9 aus Kunststoff, das im Querschnitt im wesentliche U-förmige Form hat (vgl. Figur 2). Der Handgriff 7 weist Stege 10 und einen Mittelsteg 11 auf. Der Handgriff 7 weist in seinem von der Hand der Bedienungsperson umgriffenen Griffteil 12 sowie in dem oberen Steg 10 und dem Mittelsteg 11 eine umlaufende mittige Nut 13 auf, die dem Gehäuse 2 zugewandt ist. Das Gerüst 9 ist mit einer griffgünstig geformten elastischen Ummantelung 14, z. B. einem Schaummaterial umschlossen. Der ganze Handgriff 7 besteht aus einem nicht geteilten massiven Teil. Durch die Stege 10, 11 ist eine obere 15 und eine untere Grifföffnung 16 zum beidhändigen Halten ausgebildet, sodaß ein sogenannter Doppelspatengriff entsteht. Die Grifföffnungen 15, 16 werden durch eine dem Gehäuse 2 zugewandte Wandung 17 abgeschlossen.A hammer drill 1 has a housing 2 made of plastic, which has a cylindrical housing part in which a motor 3 is housed. Furthermore, a striking mechanism 4, which is only indicated in the drawing, is contained in the housing 2 perpendicular to the motor 3. In an extension of the striking mechanism 4, a tool holder 5 with a drilling tool 6 is arranged in a manner known per se. At the end of the hammer opposite the tool holder, a handle 7 is fastened to the housing 2 with screws 8. The handle 7 has the shape of a spade handle and consists of a frame 9 made of plastic, which has a substantially U-shaped cross section (see FIG. 2). The handle 7 has webs 10 and a central web 11. The handle 7 has in its grip part 12 gripped by the hand of the operator and in the upper web 10 and the central web 11 a circumferential central groove 13 which faces the housing 2. The scaffold 9 is provided with an easily accessible elastic sheath 14, e.g. B. enclosed a foam material. The whole handle 7 consists of an undivided solid part. The webs 10, 11 form an upper 15 and a lower handle opening 16 for holding with both hands, so that a so-called double spade handle is created. The handle openings 15, 16 are closed by a wall 17 facing the housing 2.

In die Nut 13 des Handgriffs 7 ist ein geschlossener Rahmen 18 eingesetzt, der aus Kunststoff oder Blech bestehen kann. Im Bereich des Griffteils 12 besteht der Rahmen aus 2 parallelen, in den Wandungen der Nut 13 anliegenden Lappen 19 und 20. Die beiden Lappen 19, 20 weisen gegenüberliegend jeweils eine Bohrung 21, 22 auf. An den dem Griffteil 12 zugewandten Enden haben die Lappen 19, 20 an ihrer Innenseite gegenüberliegend jeweils eine Einführschräge 23, 24.In the groove 13 of the handle 7, a closed frame 18 is inserted, which can be made of plastic or sheet metal. In the area of the grip part 12, the frame consists of 2 parallel tabs 19 and 20 which rest in the walls of the groove 13. The two tabs 19, 20 each have a bore 21, 22 on the opposite side. At the ends facing the handle part 12, the tabs 19, 20 each have an insertion bevel 23, 24 on their inner side opposite each other.

Zwischen den Lappen 19, 20, also in dem Griffteil 12 ist eine Schaltklinke 26, vorzugsweise aus Kunststoff angeordnet. Die Schaltklinke 26 weist zwei gegenüberliegende Zapfen 27, 28 auf, die in die Bohrungen 21, 22 eingreifen und damit ein Drehlager für die als zweiarmiger Hebel ausgeführte Schaltklinke bilden. Oberhalb der Zapfen 27, 28 ist ein von Hand bedienbares Betätigungsteil 29 angeordnet. Unterhalb der Zapfen 27, 28 ist ein Hebel 30 mit einer Pfanne 31 am Ende ausgebildet. Parallel zu dem Hebel verläuft ein federndes Verbindungselement 32, das mit einem Gestänge 34 einstückig verbunden ist. Das Gestänge 34 verläuft in dem Mittelsteg 11 und weist ein Anlagestück 35 auf, das an der Pfanne 31 anliegt. Das vordere Ende 36 des Gestänges 34 steht in Verbindung mit einem Schalter 37 zum Ein- und Ausschalten des Bohrhammers 1. Das Gestänge 34 und das Anlagestück 35 bilden zusammen mit der Pfanne 31 Mittel zur Übertragung der auf die Schaltklinke 26 ausgeübten Betätigungskraft auf den Schalter 37. Dieser ist außerhalb des Handgriffs 7 im oder auf dem Gehäuse 2 des Bohrhammers, vorteilhaft insbesondere in dem Raum zwischen dem Handgriff 7 und dem Gehäuse 2, untergebracht. Der Schalter 37 kann auch an der dem Gehäuse 2 zu gerichteten Wandung 17 des Handgriffs 7 befestigt sein. Der Schalter 37 ist als nicht rastender Druckschalter ausgebildet und mit einem in das Gehäuse 2 eingeführten Anschlußkabel 38 verbunden.A switching pawl 26, preferably made of plastic, is arranged between the tabs 19, 20, that is to say in the handle part 12. The switching pawl 26 has two opposite pins 27, 28 which engage in the bores 21, 22 and thus form a pivot bearing for the switching pawl designed as a two-armed lever. A manually operable actuating part 29 is arranged above the pins 27, 28. Below the pin 27, 28, a lever 30 is formed with a pan 31 at the end. A resilient connecting element 32 runs parallel to the lever and is integrally connected to a linkage 34. The linkage 34 runs in the central web 11 and has a contact piece 35 which bears against the pan 31. The front end 36 of the linkage 34 is connected to a switch 37 for switching the hammer drill 1 on and off. The linkage 34 and the contact piece 35 together with the socket 31 form means for transmitting the actuating force exerted on the pawl 26 to the switch 37 This is accommodated outside the handle 7 in or on the housing 2 of the rotary hammer, advantageously in particular in the space between the handle 7 and the housing 2. The switch 37 can also be attached to the wall 17 of the handle 7 facing the housing 2. The switch 37 is designed as a non-latching pressure switch and is connected to a connecting cable 38 inserted into the housing 2.

Bei der Montage des Bohrhammers 1 wird zunächst die Schaltklinke und das damit fest verbundene Gestänge 34 in Pfeilrichtung A, also von außen zwischen die Lappen 19, 20 des Rahmens 18 eingedrückt. Dabei gleiten die Zapfen 27, 28 über die Einführschräge 23, 24 bis sie in den Bohrungen 21, 22 einschnappen. Anschließend wird der Rahmen 18 mit montierter Schaltklinke 26 in Pfeilrichtung B in die Nut 13 des Handgriffs 7 eingeschoben. Der Rahmen 18 verschließt dabei die Nut 13 in den Verbindungsstegen 10, 11. Im Griffteil 12 ist das Betätigungsteil 29 in die Nut 13 eingesetzt. In diesem Zustand wird nun der komplett vormontierte Handgriff 7 an das Gehäuse 2 mittels der Schrauben 8 angeschraubt. Dabei kommt das Gestänge 34 genau vor dem Schalter 37 zu liegen, so daß eine einwandfreie Betätigung des Schalters ermöglicht ist. Beim Betätigen der Schaltklinke 26 wird die Kraft über den Hebel 30 auf die Pfanne 31 übertragen und von dort über das Anlagestück 35 auf das als Druckstange wirkende Gestänge 34 weitergegeben. Pfanne 31 und Anlagestück 35 sind nicht starr gekoppelt sondern gegeneinander verschieblich, so daß die Drehbewegung der Schaltklinke 26 problemlos auf die Längsbewegung des Gestänges 34 übertragen wird. Den Zusammenhalt von Schaltklinke 26 und Gestänge 34 bewirkt das mit beiden Teilen einstückige Verbindungselement 32.When installing the rotary hammer 1, the pawl and the linkage 34 firmly connected to it are first pressed in in the direction of arrow A, that is to say from the outside, between the tabs 19, 20 of the frame 18. The pins 27, 28 slide over the insertion bevel 23, 24 until they snap into the bores 21, 22. Then the frame 18 is inserted with the mounted pawl 26 in the direction of arrow B into the groove 13 of the handle 7. The frame 18 closes the groove 13 in the connecting webs 10, 11. In the handle part 12, the actuating part 29 is inserted into the groove 13. In this state, the completely pre-assembled handle 7 is now attached to the housing 2 the screws 8 screwed on. The linkage 34 comes to lie exactly in front of the switch 37, so that the switch can be operated correctly. When the pawl 26 is actuated, the force is transmitted via the lever 30 to the pan 31 and from there passed on via the contact piece 35 to the linkage 34 acting as a push rod. Pan 31 and contact piece 35 are not rigidly coupled but can be displaced relative to one another, so that the rotary movement of the pawl 26 is easily transmitted to the longitudinal movement of the linkage 34. The cohesion of pawl 26 and linkage 34 is brought about by the connecting element 32, which is integral with both parts.

Die Erfindung beschränkt sich nicht auf das beschriebene Ausführungsbeispiel. So kann die Schaltklinke statt drehbar auch längsverschieblich eindrückbar sein mit Längsführungen in dem im Handgriff angeordneten Rahmen. Die Erfindung ist auch auf andere Elektrowerkzeuge wie zum Beispiel Bohrmaschinen oder Schrauber anwendbar.The invention is not limited to the exemplary embodiment described. For example, the pawl can also be pushed in longitudinally displaceably instead of rotatably with longitudinal guides in the frame arranged in the handle. The invention is also applicable to other power tools such as drills or screwdrivers.

Claims (13)

Elektrisch angetriebene Handwerkzeugmaschine, insbesondere Bohrhammer, mit einem Gehäuse, das, vorzugsweise in zylindrischen Gehäuseteilen einen Motor und Maschinenelemente wie Getriebe, Schlagwerk usw. aufnimmt, und mit einem mit dem Gehäuse verbundenen Handgriff, insbesondere Spat enhandgriff, in dem eine Schaltklinke zur Betätigung eines elektrischen Schalters zum Ein- und Ausschalten untergebracht ist, dadurch gekennzeichnet, daß der Schalter (17) jenseits der Grifföffnung (15, 16) des Handgriffs (7) im Bereich des Gehäuses (2) angebracht ist und Mittel (31, 34, 35) zur Kraftübertragung von der Schaltklinke (26) auf den Schalter (37) angeordnet sind.Electrically powered hand-held power tool, in particular rotary hammer, with a housing that accommodates a motor and machine elements, such as gears, striking mechanisms, etc., preferably in cylindrical housing parts, and with a handle connected to the housing, in particular a spade handle, in which a pawl for actuating an electrical Switch for switching on and off is located, characterized in that the switch (17) is mounted beyond the handle opening (15, 16) of the handle (7) in the region of the housing (2) and means (31, 34, 35) for Power transmission from the pawl (26) to the switch (37) are arranged. Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel (31, 34, 35) einstückig mit der Schaltklinke (26) verbunden sind.Hand tool according to Claim 1, characterized in that the means (31, 34, 35) are connected in one piece to the switching pawl (26). Handwerkzeugmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Mittel (34, 35) mit der Schaltklinke (26) gelenkig verbunden sind.Hand tool according to claim 1 or 2, characterized in that the means (34, 35) are articulated to the switching pawl (26). Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mittel zur Kraftübertragung als starres Gestänge (34) ausgebildet sind, an das ein federndes Verbindungselement (32) zur Schaltklinke (26) angeformt ist.Hand machine tool according to one of the preceding claims, characterized in that the means for power transmission are designed as a rigid linkage (34) on which a resilient connecting element (32) for the pawl (26) is molded. Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Handgriff (7) als Doppelspatengriff mit einem Mittelsteg (11) ausgebildet ist.Hand tool according to one of the preceding claims, characterized in that the handle (7) is designed as a double spade handle with a central web (11). Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schaltklinke (26) in einem Griffteil (12) des Handgriffs (7) angeordnet ist und das Gestänge (34) in einem Steg (10, 11) verläuft.Hand tool according to one of the preceding claims, characterized in that the switching pawl (26) is arranged in a handle part (12) of the handle (7) and the linkage (34) runs in a web (10, 11). Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schaltklinke (26) und die Mittel (34, 35) zur Kraftübertragung in einem in den Handgriff (7) einsetzbaren Rahmen (18) angeordnet sind.Hand tool according to one of the preceding claims, characterized in that the switching pawl (26) and the means (34, 35) for power transmission are arranged in a frame (18) which can be inserted into the handle (7). Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schaltklinke (26) drehbar in dem Rahmen (18) gelagert ist.Hand tool according to one of the preceding claims, characterized in that the switching pawl (26) is rotatably mounted in the frame (18). Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Drehlager für die Schaltklinke (26) ausschließlich von Teilen (21, 22, 27, 28) des Rahmens (18) und der Schaltklinke (26) selbst gebildet wird.Hand tool according to one of the preceding claims, characterized in that the rotary bearing for the pawl (26) is formed exclusively by parts (21, 22, 27, 28) of the frame (18) and the pawl (26) itself. Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schaltklinke (26) als zweiarmiger Hebel ausgebildet ist, der auf das als Druckstange wirkende Gestänge (34) wirkt.Hand tool according to one of the preceding claims, characterized in that the switching pawl (26) is designed as a two-armed lever which acts on the linkage (34) which acts as a push rod. Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Handgriff (7) massiv ausgebildet ist und dem Gehäuse (2) zugewandt eine Nut (13) zur Aufnahme des Rahmens (18) aufweist.Hand tool according to one of the preceding claims, characterized in that the handle (7) is solid and has a groove (13) facing the housing (2) for receiving the frame (18). Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Handgriff (7) keine spannungsführenden Bauteile wie Drähte, Kontakte oder Schalter enthält.Hand tool according to one of the preceding claims, characterized in that the handle (7) contains no live components such as wires, contacts or switches. Handwerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Handgriff (7) mit einer griffgünstig geformten elastischen Ummantelung (14) versehen ist.Hand tool according to one of the preceding claims, characterized in that the handle (7) is provided with an elastic casing (14) which is shaped to be easy to grip.
EP91102887A 1990-03-03 1991-02-28 Electrically operated hammer Expired - Lifetime EP0445636B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006721 1990-03-03
DE4006721A DE4006721A1 (en) 1990-03-03 1990-03-03 ELECTRICALLY POWERED HAMMER

Publications (2)

Publication Number Publication Date
EP0445636A1 true EP0445636A1 (en) 1991-09-11
EP0445636B1 EP0445636B1 (en) 1995-01-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102887A Expired - Lifetime EP0445636B1 (en) 1990-03-03 1991-02-28 Electrically operated hammer

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EP (1) EP0445636B1 (en)
DE (2) DE4006721A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1585154A1 (en) * 2004-04-02 2005-10-12 BLACK &amp; DECKER INC. Trigger configuration for a power tool

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB142922A (en) * 1919-02-12 1920-05-12 Alexander George Slade Improvements in or relating to percussive pneumatic hand tools
DE2839545A1 (en) * 1978-09-12 1980-03-20 Maco Meudon Sa Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe
EP0028029A1 (en) * 1979-10-29 1981-05-06 Black & Decker Inc. Portable electric tool
DE3404962A1 (en) * 1984-02-11 1985-08-14 Robert Bosch Gmbh, 7000 Stuttgart HANDLE FOR DRILLING MACHINES AND / OR DRILLING HAMMER
DE3610682A1 (en) * 1986-03-29 1987-10-01 Bosch Gmbh Robert Handle for hand-held machine tools
GB2230728A (en) * 1989-04-17 1990-10-31 Kioritz Corp Engine hammer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB142922A (en) * 1919-02-12 1920-05-12 Alexander George Slade Improvements in or relating to percussive pneumatic hand tools
DE2839545A1 (en) * 1978-09-12 1980-03-20 Maco Meudon Sa Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe
EP0028029A1 (en) * 1979-10-29 1981-05-06 Black & Decker Inc. Portable electric tool
DE3404962A1 (en) * 1984-02-11 1985-08-14 Robert Bosch Gmbh, 7000 Stuttgart HANDLE FOR DRILLING MACHINES AND / OR DRILLING HAMMER
DE3610682A1 (en) * 1986-03-29 1987-10-01 Bosch Gmbh Robert Handle for hand-held machine tools
GB2230728A (en) * 1989-04-17 1990-10-31 Kioritz Corp Engine hammer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1585154A1 (en) * 2004-04-02 2005-10-12 BLACK &amp; DECKER INC. Trigger configuration for a power tool

Also Published As

Publication number Publication date
DE59104279D1 (en) 1995-03-02
DE4006721A1 (en) 1991-09-19
EP0445636B1 (en) 1995-01-18

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